10-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 10-K

(Mark One)

x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For fiscal year ended March 31, 2015

OR

¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from                     to                    

Commission File Number: 001-09585

ABIOMED, Inc.

(Exact Name of Registrant as Specified in Its Charter)

Delaware	04-2743260
(State or Other Jurisdiction of Incorporation or Organization)	(I.R.S. Employer Identification No.)
22 Cherry Hill Drive Danvers, Massachusetts	01923
(Address of Principal Executive Offices)	(Zip Code)

(978) 646-1400

(Registrant’s Telephone Number, Including Area Code)

Securities registered pursuant to Section 12(b) of the Act:

Title of Each Class	Name of Each Exchange on Which Registered
Common Stock, $.01 par value	The NASDAQ Stock Market LLC

Securities registered pursuant to Section 12(g) of the Act:

None

Indicate by check mark whether the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.    Yes  ¨    No  x

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.    Yes  ¨    No  x

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  x    No  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate website, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§ 229.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  x    No  ¨

Indicate by check mark if disclosure of delinquent filers pursuant to Rule 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K  x

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated  filer  x	Accelerated filer  ¨
Non-accelerated filer  ¨	Smaller reporting company  ¨
(Do not check if a smaller reporting company)

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ¨    No  x

The aggregate market value of the registrant’s common stock as of September 30, 2014, held by non-affiliates of the registrant (without admitting that any person whose shares are not included in such calculation is an affiliate) computed by reference to the price at which the common stock was last sold as of such date was $1,007,530,237. As of May 12, 2015, 41,737,054 shares of the registrant’s common stock, $.01 par value, were outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the definitive Proxy Statement for Abiomed, Inc.’s 2015 Annual Meeting of Stockholders, which is scheduled to be filed within 120 days after the end of Abiomed, Inc.’s fiscal year, are incorporated by reference into Part III (Items 10, 11, 12, 13 and 14) of this Form 10-K.

TABLE OF CONTENTS

		Page
PART I
Item 1.	Business		1
Item 1A.	Risk Factors		13
Item 1B.	Unresolved Staff Comments		27
Item 2.	Properties		27
Item 3.	Legal Proceedings		27
Item 4.	Mine Safety Disclosures		27
PART II
Item 5.	Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities		28
Item 6.	Selected Financial Data		30
Item 7.	Management’s Discussion and Analysis of Financial Condition and Results of Operations		31
Item 7A.	Quantitative and Qualitative Disclosure About Market Risk		40
Item 8.	Financial Statements and Supplementary Data		40
Item 9.	Changes in and Disagreements with Accountants on Accounting and Financial Disclosure		40
Item 9A.	Controls and Procedures		41
Item 9B.	Other Information		43
PART III
Item 10.	Directors, Executive Officers and Corporate Governance		43
Item 11.	Executive Compensation		43
Item 12.	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters		43
Item 13.	Certain Relationships and Related Transactions, and Director Independence		43
Item 14.	Principal Accountant Fees and Services		43
PART IV
Item 15.	Exhibits, Financial Statement Schedules		44

SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

This report, including the documents incorporated by reference in this report, includes forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended and Section 21E of the Securities Exchange Act of 1934, as amended. These forward-looking statements may be accompanied by such words as “anticipate,” “believe,” “estimate,” “expect,” “forecast,” “intend,” “may,” “plan,” “potential,” “project,” “target,” “will” and other words and terms of similar meaning. We have based these forward-looking statements on what we believe are our reasonable current expectations and projections about future events. Each forward-looking statement in this report is subject to risks and uncertainties that could cause actual results to differ materially from those expressed or implied by such statement. Forward-looking statements in these documents include, but are not necessarily limited to, those relating to:

• our ability to obtain and maintain regulatory approval both in the U.S. and abroad for our existing products as well as for new products in development, and our plans to submit Impella CP, Impella 5.0 and Impella LD as Pre-Market Approval, or PMA, supplements in fiscal 2016;

• the ability of patients and other customers using our products to obtain reimbursement of their medical expenses by government healthcare programs and private insurers including potential changes to current government and private insurers’ reimbursements;

• other competing therapies that may in the future be available to heart failure patients;

• the development of new and existing products and anticipated costs, including research and development, sales and marketing, manufacturing and training costs associated with product development;

• our plans to potentially acquire new businesses or technologies;

• the potential markets that exist or could develop for our products and products under development;

• our business strategy, and commercial plans for our products, including our expansion into new markets such as Japan;

• our revenue growth expectations, our level of operating expenses and our goal of maintaining profitability;

• expected capital expenditures for the fiscal year ending March 31, 2016;

• demand for and expected shipments of our products;

• possible shifts in the revenue mix associated with our products;

• our ability to increase revenues from our Impella line of products and the sufficiency of revenues and cash flows to fund future operations;

• future actions related to ongoing investigations and litigation, and expenditures related thereto;

• plans with respect to clinical trials; and

• the sufficiency of our liquidity and capital resources.

Factors that could cause actual results or conditions to differ from those anticipated by these and other forward-looking statements include our inability to predict the outcome of investigations and litigation and associated expenses; possible delays in our research and development programs; our ability to obtain regulatory approvals and market our products, and uncertainties related to regulatory processes; greater government scrutiny and regulation of the medical device industry and our ability to respond to changing laws and regulations affecting our industry and changing enforcement practices related thereto; the inability to manufacture products in commercial quantities at an acceptable costs, the acceptance by physicians and hospitals of our products; the impact of competitive products and pricing; uncertainties associated with future capital needs and the risks identified under “Risk Factors” section set forth in Item 1A of Part I and elsewhere in this report, as well as other information we file with the Securities and Exchange Commission. Readers are cautioned not to place undue reliance on any forward-looking statements contained in this report, which speak only as of the date of this report. We do not undertake any obligation to update or revise these forward-looking statements whether as a result of new information, future events or otherwise, unless otherwise required by law. Our business is subject to substantial risks and uncertainties, including those referenced above. Investors, potential investors, and others should give careful consideration to these risks and uncertainties.

PART I

ITEM 1. BUSINESS

Overview

We are a leading provider of temporary percutaneous mechanical circulatory support devices and we offer a continuum of care to heart failure patients. We develop, manufacture and market proprietary products that are designed to enable the heart to rest, heal and recover by improving blood flow to the coronary arteries and end-organs and/or temporarily performing the pumping function of the heart. Our products are used in the cardiac catheterization lab (cath lab) by interventional cardiologists, the electrophysiology lab, the hybrid lab and in the heart surgery suite by heart surgeons. A physician may use our devices for patients who are in need of hemodynamic support before, during or after angioplasty or heart surgery procedures. We believe heart recovery is the optimal clinical outcome for patients experiencing heart failure because it enables patients to go home with their own native heart and restores their quality of life. In addition, we believe that for the care of such patients, heart recovery is the most cost-effective solution for the healthcare system.

Our strategic focus and the driver of the majority of our revenue growth is the market penetration of our Impella family of products. Our Impella 2.5 product received 510(k) clearance in June 2008 from the U.S. Food and Drug Administration, or FDA, for partial circulatory support for up to six hours. In March 2015, we received Pre-Market Approval, or PMA, from the FDA for Impella 2.5 during elective and urgent high-risk percutaneous coronary intervention, or PCI, procedures. Impella 2.5 is the first hemodynamic support device to receive a PMA indication for use during high-risk PCI procedures, demonstrating its safety and effectiveness for this complex patient population. With this approval, the Impella 2.5 is a temporary (up to six hours) ventricular support device indicated for use during high-risk PCI performed in elective or urgent hemodynamically stable patients with severe coronary artery disease and depressed left ventricular ejection fraction, when a heart team, including a cardiac surgeon, has determined high-risk PCI is the appropriate therapeutic option. Use of the Impella 2.5 in these patients may prevent hemodynamic instability that may occur during planned temporary coronary occlusions and may reduce peri- and post-procedural adverse events. The product labeling allows for the clinical decision to leave Impella 2.5 in place beyond the intended duration of £6 hours due to unforeseen circumstances. Per our PMA approval, we will conduct a single-arm, post approval study on the Impella 2.5, collecting data on high-risk PCI patients. The study will be a prospective, multi-center study comprised of 369 patients from 70 sites supported with the Impella 2.5 system. The Impella 2.5 heart pump is supported by clinical guidelines, has been eligible to be reimbursed in the U.S. by the Centers for Medicare & Medicaid Services, or CMS under ICD-9-CM code 37.68 since 2008 for multiple indications, including high-risk PCI.

We received 510(k) clearance in April 2009 for our Impella 5.0 and Impella LD devices for circulatory support for up to six hours. These devices are larger and provide more blood flow to patients than the Impella 2.5. In September 2012, our Impella CP product received 510(k) clearance from the FDA for partial circulatory support for up to six hours. We expect to submit Impella CP, Impella 5.0 and Impella LD in fiscal 2016 as PMA supplements and that these devices will retain their 510(k) clearances until FDA completes its review of the PMA supplements. We received FDA approval for Impella RP under a Humanitarian Device Exemption, or HDE, in January 2015. The Impella RP is the first percutaneous single access heart pump designed for right heart support to receive FDA approval. Our Impella 2.5, Impella 5.0, Impella LD, Impella CP and Impella RP products also have CE Mark approval and Health Canada approval which allows us to market these devices in the European Union and Canada.

The Impella product portfolio, which includes the Impella 2.5, Impella CP, Impella RP, Impella LD and Impella 5.0, has supported over 25,000 patients in the U.S.

Our revenues are primarily generated from this product portfolio. Revenues from our non-Impella products, largely focused on the heart surgery suite, have been lower over the past several years as we have strategically shifted our sales and marketing efforts towards our Impella products and the cath lab. We expect that most of our product and service revenues in the near future will be from our Impella products.

Corporate Background

Our Company was founded in 1981 and we are currently incorporated in Delaware and trade on the NASDAQ Global Select Market under the ticker symbol ABMD.

Our principal executive offices are located at 22 Cherry Hill Drive, Danvers, Massachusetts 01923. Our telephone number is (978) 646-1400. We make available, free of charge on our website located at www.abiomed.com, our annual report on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and any amendments to those reports, as soon as reasonably practicable after filing such reports with the Securities and Exchange Commission, or SEC. ABIOMED, Inc. has a code of conduct known as, “Guidelines of Company Principles and Practices,” that applies to all of its directors, officers, and employees. These documents are available free of charge upon request in writing to the Compliance Officer at our principal executive office located at 22 Cherry Hill Drive, Danvers, Massachusetts or by e-mail to ir@abiomed.com. Our audit committee, governance and nominating committee and compensation committee charters are also posted on our website. The contents of our website are not incorporated by reference into this report.

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Our Products

Impella 2.5

The Impella 2.5 catheter is a percutaneous micro heart pump with an integrated motor and sensors. The device is designed primarily for use by interventional cardiologists to support patients in the cath lab who may require assistance to maintain their circulation. The Impella 2.5 catheter can be quickly inserted via the femoral artery to reach the left ventricle of the heart where it is directly deployed to draw blood out of the ventricle and deliver it to the circulatory system. This function is intended to reduce ventricular work and provide flow to vital organs. The Impella 2.5 is introduced with normal interventional cardiology procedures and can pump up to 2.5 liters of blood per minute.

The Impella 2.5 product received 510(k) clearance in June 2008 from the U.S. Food and Drug Administration, or FDA, for partial circulatory support for up to six hours. In March 2015, we received Pre-Market Approval, or PMA, from the FDA for Impella 2.5 during elective and urgent high-risk PCI procedures. Impella 2.5 is the first hemodynamic support device to receive a PMA indication for use during high-risk PCI procedures, demonstrating its safety and effectiveness for this complex patient population. With this approval, the Impella 2.5 is a temporary (up to six hours) ventricular support device indicated for use during high-risk PCI performed in elective or urgent hemodynamically stable patients with severe coronary artery disease and depressed left ventricular ejection fraction, when a heart team, including a cardiac surgeon, has determined high-risk PCI is the appropriate therapeutic option. Use of the Impella 2.5 in these patients may prevent hemodynamic instability that may occur during planned temporary coronary occlusions and may reduce peri- and post-procedural adverse events. The product labeling allows for the clinical decision to leave Impella 2.5 in place beyond the intended duration of £6 hours due to unforeseen circumstances. Per our PMA approval, we will conduct a single-arm, post-approval study on the Impella 2.5, collecting data on high-risk PCI patients. The study will be a prospective, multi-center study comprised of 369 patients from 70 sites supported with the Impella 2.5 system. The Impella 2.5 device has CE mark approval in Europe for up to five days of use and is approved for use in over 40 countries.

A November 2011 update to the American College of Cardiology Foundation, or ACCF, / American Heart Association, or AHA, Task Force on Practice Guidelines and the Society for Cardiovascular Angiography and Interventions Guidelines for Percutaneous Coronary Intervention, for the first time, included Impella in both the emergent and prophylactic hemodynamic support settings. In addition, a December 2012 update to the AHA’s Recommendations for the Use of Mechanical Circulatory Support: Device Strategies and Patient Selection recommended Impella for use in mechanical circulatory support; a December 2012 update to the ACCF/AHA Guidelines for the Management of ST-Elevation Myocardial Infarction (STEMI) included Impella 2.5 for use in patients requiring urgent coronary artery bypass grafting with STEMI and in treatment of patients with cardiogenic shock complications after STEMI; and a January 2013 update to the International Society for Heart and Lung Transplantation Guidelines for Mechanical Circulatory Support included Impella for the first time for patients with multi-organ failure. In addition, Impella was included in a January 2013 update to the ACCF /AHA Task Force on Practice Guidelines for the Management of ST-Elevation Myocardial Infarction and a September 2014 AHA /the American College of Cardiology (ACC) Task Force on Practice Guidelines for the Management of Patients with Non-ST-Elevation Acute Coronary Syndromes.

In addition to the U.S. clinical trial data, the Impella 2.5 PMA submission included clinical and scientific supporting evidence from more than 215 publications, covering 1,638 Impella 2.5 patients and incorporated a medical device reporting (MDR) analysis from 13,981 Impella 2.5 patients. In addition to PROTECT I and PROTECT II, further data was provided in the submission from 637 high-risk patients enrolled in the U.S. Impella registry. The U.S. Impella registry is an ongoing multicenter, observational retrospective registry that includes 49 centers. The data collection from the registry includes Institutional Review Board, or IRB, approval, complete data monitoring and Clinical Events Committee adjudication. Additionally, the PMA analysis included hemodynamic science described in the literature and validated with a series of pre-clinical and clinical studies.

Impella CP

In September 2012, we announced that the Impella CP received 510(k) clearance from the FDA. The Impella CP provides blood flow of approximately one liter more per minute than the Impella 2.5 and is primarily used by either interventional cardiologists to support patients in the cath lab or by surgeons in the heart surgery suite. The Impella CP is indicated for up to six hours of partial circulatory support using an extracorporeal bypass control unit. It is also intended to be used to provide partial circulatory support, for up to six hours, during procedures not requiring cardiopulmonary bypass. The Impella CP received CE Mark approval to be marketed in the European Union in April 2012 and Health Canada approval to be marketed in Canada in June 2012.

We are currently working with the FDA on a PMA supplement for the Impella CP and we expect to file the application in fiscal 2016. We expect Impella CP to retain its 510(k) clearance until FDA completes its review of the PMA supplement.

Impella 5.0 and Impella LD

The Impella 5.0 and Impella LD are percutaneous micro heart pumps with integrated motors and sensors for use primarily in the heart surgery suite. These devices are designed to support patients who require higher levels of circulatory support as compared to the Impella 2.5. The Impella 5.0 and Impella LD devices received 510(k) clearance in April 2009, for circulatory support for up to six hours and have CE Mark approval in Europe for up to ten days’ duration and are approved for use in over 40 countries.

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The Impella 5.0 can be inserted into the left ventricle via femoral cut down or through the axillary artery. The Impella 5.0 pump goes through the ascending aorta, across the valve and into the left ventricle. The Impella LD is similar to the Impella 5.0 but is implanted directly through an aortic graft. The Impella 5.0 and Impella LD can pump up to five liters of blood per minute, providing full circulatory support.

We are currently working with the FDA on a PMA supplement for the Impella 5.0 and LD devices and we expect to file the application for these products in fiscal 2016. The Impella 5.0 and Impella LD will retain their 510(k) clearances until completion of the FDA process.

Impella RP

The Impella RP is a percutaneous catheter-based axial flow pump that is designed to allow greater than four liters of flow per minute and is intended to provide the flow and pressure needed to compensate for right side heart failure.

In November 2012, we announced that the Impella RP received U.S. investigational device exemption, or IDE, approval from the FDA for use in RECOVER RIGHT, a pivotal clinical study in the U.S. In March 2014, we completed enrollment of 30 patients at sites that present with signs of right side heart failure, require hemodynamic support, and are being treated in the catheterization lab or cardiac surgery suite. The study collected safety and effectiveness data on the percutaneous use of the Impella RP and was submitted to the FDA in connection with the HDE application towards the submission of an HDE. In January 2015, we received FDA approval for Impella RP under an HDE.

Impella RP is the first percutaneous single access heart pump designed for right heart support to receive FDA approval. An HDE is similar to a PMA application but is intended for patient populations of 4,000 or less per year in the U.S. and is subject to certain profit and use restrictions. The Impella RP is a percutaneous device approved to provide support of the right heart during times of acute failure for certain patients who have received a left ventricle assist device or have suffered heart failure due to acute myocardial infarction, or AMI, or a failed heart transplant. An HDE requires demonstration of the safety and probable benefit of the product, which is a lower standard than is applied to a PMA. In order to receive an HDE, there must be no comparable devices approved under PMA that are available to treat the targeted population. An approved HDE authorizes sales of the device to any hospital after Institutional Review Board review and approval by the hospital. In April 2014, the Impella RP received CE Marking approval which allows for commercial sales of Impella RP in the EU and other countries that require a CE Marking approval for sales.

AB5000

We manufacture and sell the AB5000 Circulatory Support System for the temporary support of acute heart failure patients in profound shock, including patients suffering from cardiogenic shock after a heart attack, post-cardiotomy cardiogenic shock, or myocarditis. We believe the AB5000 is the only commercially available cardiac assist device that is approved by the FDA for all indications where heart recovery is the desired outcome, including patients who have undergone successful cardiac surgery and subsequently develop low cardiac output, or patients who suffer from acute cardiac disorders leading to hemodynamic instability. We expect revenues from the AB5000 to be a smaller part of our business in the future as we focus our efforts on the Impella suite of products.

Symphony

In November 2011, we announced Symphony, a synchronized minimally invasive implantable cardiac assist device designed to treat chronic patients with moderate heart failure by improving patient hemodynamics and potentially improving their quality of life. The device is designed with the primary goal of stabilizing the progression of heart failure and recovering or remodeling the heart. To date, we have implanted the device in four patients in first-in-human clinical trials of Symphony outside the U.S. We are evaluating the results of these cases and what impact on the Symphony product program moving forward. If we do continue to proceed, we would expect to conduct additional Symphony trials outside of the U.S. in the future. Symphony is not currently approved by the FDA for sale in the U.S.

ECP

In July 2014, we acquired all of the issued shares of ECP Entwicklungsgesellschaft mbH, or ECP, a German limited liability company, for $13.0 million in cash, with additional potential payments up to a maximum of $15.0 million based on the achievement of certain technical, regulatory and commercial milestones. ECP, based in Berlin, Germany, is engaged in research, development, prototyping and the pre-serial production of a percutaneous expandable catheter pump which increases blood circulation from the heart with an external drive shaft. In connection with our acquisition of ECP, ECP acquired all of the issued shares of AIS GmbH Aachen Innovative Solutions, or AIS, a German limited liability company, for $2.8 million in cash which was provided by us. AIS, based in Aachen, Germany, holds certain intellectual property useful to ECP’s business, and, prior to being acquired by ECP, had licensed such intellectual property to ECP.

Summary of Recent Financial Performance

During fiscal 2015, we recognized net income of $113.7 million, or $2.80 per basic share and $2.65 per diluted share, compared to $7.4 million, or $0.19 per basic share and $0.18 per diluted share for the prior fiscal year. The increase in net income in fiscal 2015 was primarily

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due to the net income tax benefit of $84.9 million primarily due to the release of the valuation allowance on deferred tax assets in the quarter ended March 31, 2015. We also had higher Impella product revenue due to greater utilization of our Impella products in the U.S. and Europe in fiscal 2015.

Our Markets

According to the AHA, Heart Disease and Stroke Statistics 2014 Update Report, coronary heart disease, or CHD, causes approximately one of every seven deaths in the United States. Coronary heart disease is a condition of the coronary arteries that causes reduced blood flow and insufficient oxygen delivery to the affected portion of the heart. Coronary heart disease leads to AMI, commonly known as a heart attack, which may lead to heart failure, a condition in which the heart is unable to pump enough blood to the body’s major organs. In 2011, CHD mortality was 375,295. Each year, an estimated 635,000 Americans have a new coronary attack (defined as first hospitalized myocardial infarction or coronary heart disease death) and approximately 300,000 have a recurrent attack. It is estimated that an additional 155,000 “silent” first myocardial infarctions occur each year.

A broad spectrum of therapies exists for the treatment of patients in early stages of CHD. Angioplasty procedures and stents are commonly used in the cath lab to restore and increase blood flow to the heart. These treatments are often successful in slowing the progression of heart disease, extending life, and/or improving the quality of life for some period of time. Patients presenting with acute cardiac injuries potentially have recoverable hearts. Treatment for these patients in pre-shock in the cath lab is primarily focused on hemodynamic stabilization. Acute heart failure patients in profound shock typically require treatment in the surgery suite. These are patients suffering from cardiogenic shock after a heart attack, post-cardiotomy cardiogenic shock or myocarditis complicated with cardiogenic shock. Chronic heart failure patients have hearts that are unlikely to be recoverable due to left and/or right-side heart failure and their conditions cause their hearts to fail over time. Limited therapies exist today for patients with severe, end-stage, or chronic heart failure.

In more severe cases of heart failure, patients are sent directly to the surgery suite for coronary bypass or valve replacement surgery. The most severe acute heart failure patients are in profound cardiogenic shock, including those suffering from myocarditis (a viral attack of the heart), or from those suffering from an impaired ability of the heart to pump blood after a heart attack or heart surgery. According to results of the SHOCK (Should We Emergently Revascularize Occluded Coronaries for Cardiogenic Shock) trial published in the August 26, 1999 edition of The New England Journal of Medicine, approximately 7 to 10% of the patients who are hospitalized for a heart attack suffer from cardiogenic shock and 60 to 80% of those patients die. These patients typically require treatments involving the use of mechanical circulatory support devices that provide increased blood flow and reduce the stress on the heart. Many less severe patients in the cath lab could also benefit from circulatory support devices or other clinical treatment, which could potentially prevent them from entering into profound shock.

There are a few primary types of devices used in the cath lab and surgery suite in the U.S. for circulatory support for pre-shock and profound shock patients: IABs, percutaneous assist devices, and surgical ventricular assist devices, or VADs.

An IAB is an inflatable balloon inserted via a catheter into a patient’s circulatory system and is inflated and deflated in the aorta. This is used as an initial line of therapy in the cath lab or the surgery suite for patients with diminished heart function. There are an estimated 170,000 annual IAB procedures globally, with an estimated 75,000 IAB procedures annually in the U.S. However, IABs typically provide only limited enhancement and depend on the patient’s own heart to generate the majority of the patient’s blood flow. In addition, IABs are often required to be used in conjunction with inotropes or other drugs to stimulate heart muscle ejection. The use of these drugs, however, increases the risk of mortality. Clinical publications have demonstrated that the need for two or more inotropes to improve blood flow results in mortality rates of approximately 80%. Further, the clinical efficacy of IABs has recently come into question due to the conclusions of the randomized, prospective, open-label, multicenter “SHOCK II” Trial. The conclusion of the trial was that the use of IAB counterpulsation did not significantly reduce 30-day mortality in patients with cardiogenic shock complicating acute myocardial infarction for whom an early revascularization strategy was planned. Further, IABs have limited effectiveness in patients that are arrhythmic and/or in cardiogenic shock and published reports have indicated that IABs do not reduce mortality for patients in cardiogenic shock.

Percutaneous assist devices and VADs are mechanical devices that help the failing heart pump blood or take over the pumping function of the failing heart. Historically, VADs have been highly invasive and require implantation in the surgery suite. Percutaneous assist devices allow for less invasive placement and removal, and can be done through a small puncture in the leg in the catheterization lab, electrophysiology lab, or operating room. The use of surgically placed VADs generally falls into three sub-categories: recovery, bridge-to-transplant and destination therapy.

Recovery VADs are designed to enable the patient’s heart to rest and potentially recover so that the patient can return home with his or her own heart. Because recovery is the goal, these devices are designed to minimize damage to heart tissue and are removed once the patient’s heart has recovered. If possible, recovery of a patient’s heart is generally preferred to transplantation or prolonged device implantation, both of which have significant side effects for the patient and increase the risk of mortality. We believe heart recovery is a preferred clinical outcome for patients, since it also generally lowers the overall relative cost to the healthcare system versus alternative therapies and treatment paths that may require multiple surgeries, lengthy or repeated hospital stays, chronic therapeutic and immunosuppressant drugs and other related healthcare costs.

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Research and Product Development

Since our founding in 1981, we have gained substantial expertise in circulatory support through the development of many product platforms to support heart patients. This includes our Impella platform and AB5000 systems that we currently market and other technologies that we previously supported, such as our BVS system and AbioCor program. We also continue to work on developing new technologies as well, such as ECP and Symphony development programs. Our current strategy is to develop a complete portfolio of products for partial and full circulatory support to treat acute heart failure patients. We intend to continue to use this experience to develop additional circulatory support products. Our research and development efforts are focused on developing a broader portfolio of products across the continuum of care in heart recovery, primarily focused in the area of circulatory care. In addition, we have a number of new products at various stages of development some of which integrate the Impella technology platform.

As of March 31, 2015, our research and development staff consisted of 123 employees. We expended $36.0 million, $30.7 million and $25.6 million on research and development in fiscal years 2015, 2014 and 2013, respectively. Our research and development expenditures include costs related to clinical trials, including ongoing clinical studies for our Impella products.

Sales, Clinical Support, Marketing and Field Service

As of March 31, 2015, our worldwide sales, clinical support, marketing and field service teams included 235 full-time employees, 213 of whom are in the U.S. and Canada and 22 of whom are in Europe and Japan. Over the past five years, we have significantly increased the number of our direct sales and clinical support personnel in the U.S and Europe.

Our clinical support personnel consist primarily of registered nurses and other personnel with considerable experience in either the surgery suite or the cath lab, and they play a critical role in training current and prospective customers in the use of our products.

International sales (sales outside the U.S., primarily in Europe) accounted for 10%, 9% and 7% of total product revenue during the fiscal years ended March 31, 2015, 2014 and 2013, respectively.

Manufacturing

We manufacture our products in Danvers, Massachusetts and Aachen, Germany. Our Aachen facility performs final assembly and manufactures most of our Impella disposable products, including Impella 2.5, Impella 5.0, Impella LD, Impella CP and Impella RP. Our Danvers facility manufactures certain Impella subsystems and accessories, including our Automated Impella Console, or AIC, our console for our Impella products, the AB5000, and Portable Driver. Beginning in the quarter ended March 31, 2015, we started producing the Impella CP product in our Danvers facility. In addition, we rely on third-party suppliers to provide us with components used in our existing products and products under development. For example, we outsource some of the manufacturing for components and circuit cards within our consoles.

We believe our existing manufacturing facilities give us the necessary physical capacity to produce sufficient quantities of products to meet anticipated demand for at least the next twelve months based on our current revenue forecast. We expect to continue to increase Impella manufacturing capacity in our Aachen and Danvers facilities in fiscal 2016 to support the growing demand for our Impella products. Our U.S. and German manufacturing facilities are certified by the International Organization for Standardization, or ISO, and operate under the FDA’s good manufacturing practice requirements set forth in the current quality system regulation, or QSR.

Intellectual Property

We have developed significant know-how and proprietary technology, upon which our business depends. To protect our know-how and proprietary technology, we rely on trade secret laws, patents, copyrights, trademarks, and confidentiality agreements and contracts. However, these methods afford only limited protection. Others may independently develop substantially equivalent proprietary information or technology, gain access to our trade secrets or disclose or use such secrets or technology without our approval.

A substantial portion of our intellectual property rights relating to the Impella products, AB5000, and other products under development is in the form of trade secrets, rather than patents. We protect our trade secrets and proprietary knowledge in part through confidentiality agreements with employees, consultants and other parties. We cannot assure you that our trade secrets will not become known to or be independently developed by our competitors.

We own or have rights to numerous U.S. and foreign patents. Our U.S. patents have expiration dates ranging from 2015 to 2031 and our foreign patents have expiration dates ranging from 2016 to 2032. We also own or have rights to certain pending U.S. and foreign patent applications. We believe patents will issue pursuant to such applications, but cannot guarantee it. Moreover, neither the timing of any issuance, the scope of protection, nor the actual issue date of these pending applications can be forecasted with precision. We have licensed patent rights from third parties in connection with which we are generally required to pay royalties.

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Our patents may not provide us with competitive advantages. Our pending or future patent applications may not be issued. The patents of others may render our patents obsolete, limit our ability to patent future innovations, or otherwise have an adverse effect on our ability to conduct business. Because foreign patents may afford less protection than U.S. patents, they may not adequately protect our technology.

The medical device industry is characterized by a large number of patents and by frequent and substantial intellectual property litigation. Our products and technologies could infringe on the proprietary rights of third parties. If third parties successfully assert infringement or other claims against us, we may not be able to sell our products or we may have to pay significant damages and ongoing royalties. In addition, patent or intellectual property disputes or litigation may be costly, result in product development delays, or divert the efforts and attention of our management and technical personnel. If any such disputes or litigation arise, we may seek to enter into a royalty or licensing arrangement. However, such an arrangement may not be available on commercially acceptable terms, if at all. We may decide, in the alternative, to litigate the claims or seek to design around the patented or otherwise protected proprietary technology.

The U.S. government may obtain certain rights to use or disclose technical data developed under government contracts that supported the development of some of our products. We retain the right to obtain patents on any inventions developed under those contracts, provided we follow prescribed procedures and are subject to a non-exclusive, non-transferable, royalty-free license to the U.S. government.

Competition

Competition among providers of treatments for the failing heart is intense and subject to rapid technological change and evolving industry requirements and standards. We compete with companies that have substantially greater or broader financial, product development, sales and marketing resources and experience than we do. Other advances in medical technology, biotechnology and pharmaceuticals may reduce the size of the potential markets for our products or render those products obsolete. Among our medical device competitors are Getinge (Maquet Cardiovascular), Teleflex Inc., Thoratec Corporation, HeartWare International Inc., Terumo Heart, Inc. and CardiacAssist Inc.

Our customers are hospitals that have limited budgets. As a result, our products compete against a broad range of medical devices and other therapies for these limited funds. Our continued success will depend in large part upon our ability to enhance our existing products, to develop new products to meet regulatory and customer requirements, and to achieve market acceptance. We believe that important competitive factors with respect to the development and commercialization of our products include the relative speed with which we can develop products, establish clinical utility, complete clinical trials and regulatory approval processes, obtain and protect reimbursement, maintain cost effectiveness for our products, and supply commercial quantities of our product to meet customer demand.

Third-Party Reimbursement

Our products and services are generally purchased by healthcare institutions that rely on third-party payers to cover and reimburse the costs of related patient care. In the U.S., as well as in many foreign countries, government-funded or private insurance programs pay the cost of a significant portion of a patient’s medical expenses. No uniform policy of coverage or reimbursement for medical technology exists among all these payers. Therefore, coverage and reimbursement can differ significantly from payer to payer and by jurisdiction.

Third-party payers may include government healthcare programs such as Medicare or Medicaid, private insurers or managed care organizations. The Centers for Medicare & Medicaid Services, or CMS, is responsible for administering the Medicare program in the U.S. and, along with its contractors, establishes coverage and reimbursement policies for the Medicare program. Medicare’s coverage and reimbursement policies are particularly significant to our business because a large percentage of the population for which our products are intended includes elderly individuals who are Medicare beneficiaries. In addition, private payers often follow the coverage and reimbursement policies of Medicare. We cannot assure that government or private third-party payers will continue to cover and reimburse the procedures using our products in whole or in part in the future or that payment rates will be adequate.

Medicare payment may be made, in appropriate cases, for procedures performed in the in-patient hospital setting using our technology. Medicare generally reimburses healthcare institutions in which the procedures are performed based upon prospectively determined amounts. For hospital in-patient stays, the prospective payment generally is determined by the patient’s condition and other patient data and procedures performed during the in-patient stay, using a classification system known as International Classification of Diseases, or ICD-9, and medical severity diagnosis-related groups, or MS DRGs. Prospective rates are adjusted for, among other things, regional differences, co-morbidity and complications. Hospitals performing in-patient procedures using our devices generally do not receive separate Medicare reimbursement for the specific costs of purchasing or implanting our products. Rather, reimbursement for these costs is bundled with the MS DRG-based payments made to hospitals for the procedures during which our devices are implanted, removed, repaired or replaced. Because prospective payments are based on predetermined rates and may be less than a hospital’s actual costs in furnishing care, hospitals have incentives to lower their in-patient operating costs by utilizing products, devices and supplies that will reduce the length of in-patient stays, decrease labor or otherwise lower their costs.

Medicare has announced plans to transition to a new system of ICD-10 in October 2015. CMS has stated that the transition from ICD-9 to ICD-10 codes is intended to provide more descriptive information about procedures used to deliver care to patients, and is not a mechanism

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for remapping DRGs or changing payment. Recently CMS updated their description for Impella to use 5A02(1,2)1D: “Assistance with Cardiac Output Using Impeller Pump,” which continues to map to DRG 216-221. We believe this is an accurate description/DRG assignment and do not expect changes. However future updates before and after implementation are possible.

Coverage and reimbursements for procedures to implant, remove, replace or repair our products are generally established in the U.S. market. For instance, Medicare covers the use of LVADs when used for support of blood circulation post-cardiotomy, as a temporary life-support system until a human heart becomes available for transplant, or as destination therapy for patients who require permanent mechanical cardiac support, when the use is consistent with FDA approval and FDA-approved labeling instructions, as applicable. Coverage and reimbursements for procedures to implant the Impella 2.5, CP, 5.0, or LD are also established for in-hospital use by Medicare including ICD-9 for procedures and MS DRG coding. Actual coverage and payment may vary by local Medicare fiscal intermediary or third-party insurer. We also announced in 2013 recent coverage decisions by third party insurers including Aetna, Humana, Cigna, HCSC Blue Cross Blue Shield, and United Healthcare, to include Impella policies in their commercial and/or Medicare plans.

In addition to payments to hospitals for procedures using our technology, Medicare makes separate payments to physicians for their professional services when they perform surgeries to implant, remove, replace or repair our devices or when they perform percutaneous insertion and removal of Impella. Physicians generally bill for such services using a coding system known as Current Procedural Terminology, or CPT, codes. Physician services performed in connection with the implantation, removal, replacement or repair of our approved products are billed using a variety of CPT codes. Generally, Medicare payment levels for physician services are based on the Medicare Physician Fee Schedule and are revised annually by CMS.

In general, third-party reimbursement programs in the U.S. and abroad, whether government-funded or commercially insured, are developing a variety of increasingly sophisticated methods of controlling healthcare costs, including prospective reimbursement and capitation programs, group purchasing, reducing benefit coverage, requiring second opinions prior to major surgery, negotiating reductions to charges on patient bills, promoting healthier lifestyle initiatives and exploring more cost-effective methods of delivering healthcare. These types of cost-containment programs, as well as legislative or regulatory changes to reimbursement policies, could limit the amount which healthcare providers may be willing to pay for our medical devices.

Government Regulation

The healthcare industry, and thus our business, is subject to extensive federal, state, local and foreign regulation. Some of the pertinent laws have not been definitively interpreted by the regulatory authorities or the courts, and their provisions are open to a variety of interpretations. In addition, these laws and their interpretations are subject to change.

Premarket Regulation

In the U.S., the FDA strictly regulates medical devices under the authority of the Federal Food, Drug and Cosmetic Act, or FFDCA, and its regulations. The FDA classifies U.S. medical devices into one of three classes (Class I, II or III) based on the statutory framework described in the FFDCA. Class III devices, which are typically life-sustaining, life-supporting or implantable devices, or new devices that have been found not to be substantially equivalent to legally marketed devices. Class III devices must generally receive a PMA by the FDA to ensure their safety and effectiveness.

The PMA approval pathway requires reasonable assurance of the safety and effectiveness of the device to the FDA’s satisfaction. The PMA approval pathway is much more costly, lengthy and uncertain than the 510(k) path. In the PMA process, the FDA examines detailed data to assess the safety and effectiveness of the device. This information includes design, development, manufacture, labeling, advertising, preclinical testing and clinical study data. Prior to approving a PMA, the FDA may conduct an inspection of the manufacturing facilities and the clinical sites where the supporting study was conducted. The facility inspection evaluates the company’s compliance with the Quality System Regulation, or QSR. An inspection of clinical sites evaluates compliance with the IDE requirements. Typically, the FDA will convene an advisory panel meeting to seek review of the data presented in the PMA. The panel’s recommendation is given substantial weight, but is not binding on the agency. By regulation, the FDA has 180 days to review a PMA application not requiring an advisory panel meeting, and 320 days to review a PMA application that does require an advisory panel meeting. While the FDA has approved PMA applications within the allotted time period, reviews can occur over a significantly protracted period, usually 18 to 36 months, but sometimes longer, and a number of devices have never been approved for marketing.

If the FDA’s evaluation is favorable, the PMA is approved and the device may be marketed in the U.S. The FDA may approve a PMA with post-approval conditions intended to ensure the safety and effectiveness of the device including, among other things, restrictions on labeling and promotion, and post-market collection of clinical data. Failure to comply with the conditions of approval can result in material adverse enforcement action, including the loss or withdrawal of the approval. Even after approval of a PMA, a new PMA or PMA supplement is required in the event of a modification to the device, its labeling or its manufacturing process. Even if a device receives 510(k) clearance or PMA approval, the FDA may include significant limitations on the indicated uses for which a device may be marketed. FDA enforcement policy prohibits the promotion of approved medical devices for unapproved uses. In addition, product approvals can be withdrawn for failure to comply with regulatory requirements or the occurrence of unforeseen problems following initial marketing.

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Certain Class III devices that were on the market before May 28, 1976, known as pre-amendment Class III devices, and devices that are determined to be substantially equivalent to them, can be brought to market through the 510(k) process until the FDA, by regulation, calls for PMA applications for these devices. In addition, the Safe Medical Devices Act of 1990, as amended by the Food and Drug Administration Safety and Innovation Act (FDAISIA) of 2012, requires the FDA either to down-classify pre-amendment Class III devices to Class I or Class II or to publish an administrative order retaining the devices in Class III. Manufacturers of pre-amendment Class III devices that the FDA retains in Class III must submit a PMA application within 90 days after the FDA publishes a final order requiring premarket approval for the device, or 30 months after final classification of the device, whichever is later. Failure to meet the deadline can lead the FDA to prevent continued marketing of the device during the PMA application review period. The Impella 2.5, Impella CP, Impella 5.0 and Impella LD received 510(k) clearance based on substantial equivalence to a pre-amendment Class III device. In December 2012, as part of the FDA’s 515 Program Initiative, an FDA panel voted to recommend continuation of Class III status for temporary ventricular support devices within the non-roller type cardiopulmonary bypass blood pumps category, which includes our Impella products. The panel’s recommendation of Class III for this category of device is consistent with the current Class III designation for these device types. The FDA accepted the panel’s recommendation and has issued a proposed administrative order reflecting this categorization.

During the 510(k) process, the FDA reviews a premarket notification and determines whether or not a proposed device is “substantially equivalent” to “predicate devices.” If the intended use and technological characteristics are comparable to a predicate device, the device may be cleared for marketing. If the device has the same intended use as a predicate device and different technological characteristics, but data is submitted to the FDA showing that the device is at least as safe and effective as the legally marketed device, it may also be cleared for marketing. The FDA’s 510(k) clearance pathway usually takes three to 12 months, but it can often last longer and clearance is never assured. In reviewing a premarket notification, the FDA may request additional information, including clinical data. After a device receives 510(k) clearance, any modification that could significantly affect its safety or effectiveness, or that would constitute a major change in its intended use, requires a new 510(k) clearance or could require PMA approval. The FDA requires each manufacturer to make this determination in the first instance, but the agency can review any such decision. If the FDA disagrees with a manufacturer’s decision not to seek a new 510(k) clearance, the agency may retroactively require the manufacturer to seek 510(k) clearance or PMA approval. The FDA can also require the manufacturer to cease marketing and/or recall the modified device until 510(k) clearance or PMA approval is obtained. Additionally, the manufacturer may be subject to significant regulatory fines or penalties.

In 2009, the FDA began implementing the 515 Program Initiative to facilitate the potential reclassification of twenty-six medical device types that are currently considered Class III devices. Class I and II devices are generally considered to be lower risk than Class III devices and require clearance through the FDA’s 510(k) premarket notification process. Class III devices, however, are typically higher risk and first-of-a-kind and require approval through a PMA which is more costly and uncertain process to approval than the 510(k) premarket notification process.

In December 2012, as part of the FDA’s 515 Program Initiative, an FDA panel voted to recommend continuation of Class III status for temporary ventricular support devices within the non-roller type cardiopulmonary bypass blood pumps category, which includes our Impella products. The panel’s recommendation of Class III for this category of device is consistent with the current Class III designation for these device types. The FDA accepted the panel’s recommendation and we worked with the FDA on the PMA application for our Impella 2.5 pump for use during high-risk PCI procedures. Under the 515 Program Initiative, we are permitted to continue to market our Impella products pursuant to the 510(k) clearance for a sufficient time to allow for the submission and review of PMA applications relating to our Impella products.

In March 2015, we received Pre-Market Approval, or PMA , from the FDA for Impella 2.5 during elective and urgent high-risk percutaneous coronary intervention, or PCI, procedures. Impella 2.5 is the first hemodynamic support device to receive a PMA indication for use during high-risk PCI procedures, demonstrating its safety and effectiveness for this complex patient population. With this approval, the Impella 2.5 is a temporary (up to six hours) ventricular support device indicated for use during high-risk PCI performed in elective or urgent hemodynamically stable patients with severe coronary artery disease and depressed left ventricular ejection fraction, when a heart team, including a cardiac surgeon, has determined high-risk PCI is the appropriate therapeutic option. Use of the Impella 2.5 in these patients may prevent hemodynamic instability that may occur during planned temporary coronary occlusions and may reduce peri- and post-procedural adverse events. The product labeling allows for the clinical decision to leave Impella 2.5 in place beyond the intended duration of up to six hours due to unforeseen circumstances. Per our PMA approval, we will conduct a single-arm, post approval study on the Impella 2.5, collecting data on high-risk PCI patients. The study will be a prospective, multi-center study comprised of 369 patients from 70 sites supported with the Impella 2.5 system.

When clinical trials of a device are required in order to obtain FDA approval, the sponsor of the trial is required to file an IDE application before commencing clinical trials. The FDA reviews and must approve an IDE before a study may begin in the U.S. In addition, the study must be approved by an Institutional Review Board, or IRB, for each clinical site.

We are currently conducting the U.S. Impella registry, the first U.S. multicenter observational registry collecting clinical data and outcomes for general use patients supported with the Impella 2.5, CP, and 5.0. The FDA, the IRB at each institution at which a clinical trial is being performed or we, may suspend a clinical trial at any time for various reasons, including a belief that the subjects are being exposed to an unacceptable health risk. All clinical studies of investigational devices must be conducted in compliance with FDA requirements. Following the completion of a study, the data from the study must be collected, analyzed and presented in an appropriate submission to the FDA, either through an IDE, 510(k) premarket notification or a PMA.

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In addition, certain medical devices can be approved by the FDA in the U.S. under an HDE rather than a PMA. In order for a device to be eligible for an HDE, there must be a qualifying target patient population of less than 4,000 patients per year for which there is no other comparable device available to treat the condition. The FDA must agree that a device meets these criteria before it can be approved under an HDE. To treat that qualifying patient population FDA approval of an HDE also requires demonstration that the device is safe for its intended application, that it is potentially effective, and that the probable benefits outweigh the associated risks. Within the regulations for an HDE, if a device becomes available through the PMA process that addresses the same patient population as the HDE device, the HDE device may need to be withdrawn from the U.S. market. An approved HDE authorizes sales of the device to any hospital after Institutional Review Board review and approval by the hospital. Proposed modifications to approved HDE devices, like modifications to approved PMA devices, require FDA approval through a new HDE application or an HDE supplement.

We received FDA approval for Impella RP under an HDE in January 2015. Impella RP is the first percutaneous single access heart pump designed for right heart support to receive FDA approval. The Impella RP is a percutaneous device approved to provide support of the right heart during times of acute failure for certain patients who have received a LVAD or have suffered heart failure due to AMI or a failed heart transplant.

Our AB5000 system is approved by the FDA for use in patients who have undergone successful cardiac surgery and subsequently develop low cardiac output, or patients who suffer from acute cardiac disorders leading to hemodynamic instability. The intent of therapy is to provide circulatory support, restore normal hemodynamics, reduce ventricular work, and allow the heart time to recover adequate mechanical function. In April 2003, the AB5000 Circulatory Support System Console and in September 2003, the AB5000 VAD were approved under PMA supplements. We received FDA clearance for our IAB in December 2006. Our iPulse console was approved by the FDA under a PMA supplement in December 2007. Our Impella 2.5 device received 510(k) clearance in June 2008 for partial circulatory support for up to six hours. We received FDA 510(k) clearance of our Impella 5.0 and Impella LD devices in April 2009 for circulatory support for up to six hours. Our AB Portable Driver received FDA approval under a PMA supplement in March 2009. All of these products have CE marks allowing distribution within the European Union. In September 2012, we announced that the Impella CP received 510(k) clearance from the FDA for up to six hours of partial circulatory support using an extracorporeal bypass control unit. The Impella CP (previously marketed outside of the U.S. as Impella cVAD) received CE Mark approval to market the device in the European Union in April 2012 and Health Canada approval to market the device in Canada in June 2012. . In April 2014, the Impella RP received CE Marking approval which allows for commercial sales of Impella RP in the EU and other countries that require a CE Marking approval for sales.

Postmarket Regulation

The medical devices that we manufacture and distribute pursuant to FDA clearances or approvals are subject to continuing regulation by the FDA and other regulatory authorities. The FDA reviews design, manufacturing, and distribution practices, labeling and record keeping, and manufacturers’ required reports of adverse experience and other information to identify potential problems with marketed medical devices. Among other FDA requirements, we must comply with the FDA’s good manufacturing practice regulations. These regulations govern the methods used in, and the facilities and controls used for, the design, manufacture, packaging and servicing of all finished medical devices intended for human use. We must also comply with Medical Devices Reporting, or MDR, which requires us to report to the FDA any incident in any of our products that may have caused or contributed to a death or serious injury, or required an unnecessary intervention for a patient, or in which any of our products malfunctioned and, if such malfunction were to recur, would be likely to cause or contribute to a death or serious injury. Labeling, advertising, and promotional activities are subject to scrutiny by the FDA and, in certain circumstances, by the Federal Trade Commission. Current FDA enforcement policy prohibits the marketing of approved medical devices for unapproved uses. We are subject to routine inspection by the FDA and other regulatory authorities for compliance with QSR and MDR requirements, as well as other applicable regulations. If the FDA were to conclude that we are not in compliance with applicable laws or regulations, or that any of our medical devices are ineffective or pose an unreasonable health risk, the FDA could ban such medical devices, detain or seize adulterated or misbranded medical devices, order a recall, repair, replacement, or refund of such devices, and require us to notify health professionals and others that the devices present unreasonable risks of substantial harm to the public health. The FDA may also impose operating restrictions, enjoin and restrain certain violations of applicable law pertaining to medical devices, and assess civil or criminal fines and penalties against our officers, employees, or us. The FDA may also recommend prosecution to the U.S. Department of Justice.

The FDA and other regulatory agencies actively enforce regulations prohibiting promotion of off-label uses and the promotion of products for which marketing clearance has not been obtained. If the FDA or another regulatory agency determines that our promotional materials or training constitutes promotion of an unapproved use, it could request that we modify our training or promotional materials or subject us to regulatory enforcement actions, including the issuance of a warning letter, injunction, seizure, civil fine and criminal penalties. Although our policy is to refrain from statements that could be considered off-label promotion of our products, the FDA or another regulatory agency could disagree and conclude that we have engaged in off-label promotion.

In June 2011, we received a warning letter from the FDA stating that some of our promotional materials marketed the Impella 2.5 for uses that had not been approved by the FDA. We cooperated with the FDA and made changes to our promotional materials in response to the warning letter. However, in April 2012, we received a follow up letter from the FDA stating that some of our promotional materials continued to market the Impella 2.5 in ways that are not compliant with FDA regulations. After additional action by us, we received a close-out letter in February 2013 from the FDA with respect to this matter, which noted that the FDA’s Office of Compliance had completed its review of the corrective actions we took in response to the warning letter and that the concerns cited appeared to have been addressed.

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On October 26, 2012, we were informed that the Department of Justice, United States Attorney’s Office for the District of Columbia was conducting an investigation, or the “Marketing and Labeling Investigation” focused on our marketing and labeling of the Impella 2.5. On October 31, 2012, we accepted service of a subpoena related to this investigation seeking documents related to the Impella 2.5. We believe that we have substantially complied with the subpoena and have submitted the requested documents to the United States Attorney’s Office. On September 13, 2013, we entered into a tolling agreement with the United States Attorney’s Office, pursuant to which we and the United States Attorney’s Office mutually agreed to toll the applicable statutes of limitations for all criminal, civil and administrative offenses and violations that could be charged or claimed against us as of that date. On May 27, 2014 and January 30, 2015, we executed extensions of the tolling agreement. These extensions expired on March 2, 2015. The investigation is ongoing and we are unable to predict the ultimate outcome or determine whether a liability has been incurred or make an estimate of the reasonably possible liability, if any, that could result from any unfavorable outcome associated with this investigation. We have incurred significant expenses related to this investigation and we could continue to incur additional expenses in the future related to this action.

On April 25, 2014, we received a subpoena from the Boston regional office of the United States Department of Health and Human Services, or HHS, Office of Inspector General requesting materials relevant to our reimbursement of expenses and remuneration to healthcare providers for a six month period from July 2012 through December 2012 in connection with a civil investigation under the False Claims Act (the “FCA Investigation” and, together with the Marketing and Labeling Investigation, the “DOJ Investigations”). We submitted the requested documents to HHS and believe that we have substantially complied with the subpoena. On November 6, 2014, we received notice from the Department of Justice, United States Attorney’s Office for the District of Massachusetts in the form of a Civil Investigative Demand (“CID”) requesting additional materials relating to this matter for the time period of January 1, 2012 through December 31, 2013. We are currently in the process of responding to the additional requests for information contained in the CID and intend to continue to cooperate with the U.S. Attorney’s Office in connection with the FCA investigation.

The FDA often requires post-market surveillance, or PMS, for significant risk devices, such as VADs, that require ongoing collection of clinical data during commercialization that must be gathered, analyzed and submitted to the FDA periodically for up to several years. The PMS data collection requirements are often burdensome and expensive and have an effect on the PMA approval status. The failure to comply with the FDA’s regulations can result in enforcement action, including seizure of products, injunction, prosecution, civil fines and penalties, recall and/or suspension of FDA approval. The export of devices such as ours is also subject to regulation in certain instances.

The FDA, in cooperation with U.S. Customs and Border Protection, or CBP, administers controls over the import and export of medical devices into and out of the U.S. The CBP imposes its own regulatory requirements on the import of medical devices, including inspection and possible sanctions for noncompliance. The FDA also administers certain controls over the export of medical devices from the U.S. International sales of our medical devices that have not received FDA approval are therefore subject to FDA export requirements.

Fraud and Abuse Laws

Our business is regulated by laws pertaining to healthcare fraud and abuse including anti-kickback laws and false claims laws. Violations of these laws are punishable by significant criminal and civil sanctions, including, in some instances, exclusion from participation in federal and state healthcare programs, such as Medicare and Medicaid. Because of the far-reaching nature of these laws, we may be required to alter one or more of our practices to be in compliance with these laws. Evolving interpretations of current laws, or the adoption of new laws or regulations, could adversely affect our arrangements with customers and physicians. In addition, any violation of these laws or regulations could have a material adverse effect on our financial condition and results of operations.

Anti-Kickback Statute

Subject to a number of statutory exceptions, the federal healthcare programs Anti-Kickback Statute prohibits persons from knowingly and willfully soliciting, offering, receiving or providing remuneration, directly or indirectly, in cash or in kind, in exchange for or to induce either the referral of an individual for, or the furnishing, recommending, purchasing, leasing, ordering, or arranging for, a good or service for which payment may be made under a federal healthcare program such as Medicare and Medicaid. The term “remuneration” has been broadly interpreted to include anything of value, including gifts, discounts, the furnishing of supplies or equipment, credit arrangements, waiver of payments, and providing anything of value at less than fair market value. The Office of the Inspector General of the U.S. Department of Health and Human Services, or the OIG, and the Department of Justice are responsible for enforcing the federal healthcare programs Anti-Kickback Statute and the OIG is primarily responsible for identifying fraud and abuse activities affecting government healthcare programs.

Penalties for violating the federal healthcare programs Anti-Kickback Statute include substantial criminal fines and/or imprisonment, substantial civil fines and possible exclusion from participation in federal healthcare programs such as Medicare and Medicaid. Many states have adopted prohibitions similar to the federal healthcare programs Anti-Kickback Statute, some of which apply to the referral of patients for healthcare services reimbursed by any source, not only by the Medicare and Medicaid programs and do not include comparable exceptions to those provided by the federal healthcare programs Anti-Kickback Statute.

The OIG has issued safe harbor regulations that identify activities and business relationships that are deemed safe from prosecution under the federal healthcare programs Anti-Kickback Statute. There are safe harbors for various types of arrangements, including certain investment interests, leases, personal service arrangements, discounts and management contracts. The failure of a particular activity to comply with all

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requirements of an applicable safe harbor regulation does not mean that the activity violates the federal healthcare programs Anti-Kickback Statute or that prosecution will be pursued. However, activities and business arrangements that do not fully satisfy each applicable safe harbor may result in increased scrutiny by government enforcement authorities such as the OIG.

In recent years, the federal government and several states have enacted legislation requiring biotechnology, pharmaceutical and medical device companies to establish marketing compliance programs and file periodic reports on sales, marketing, and other activities. Similar legislation is being considered in other states. Many of these requirements are new and uncertain, and available guidance is limited. We could face enforcement action, fines and other penalties and could receive adverse publicity, all of which could harm our business, if it is alleged that we have failed to fully comply with such laws and regulations. Similarly, if the physicians or other providers or entities that we do business with are found to have not complied with applicable laws, they may be subject to sanctions, which could also have a negative impact on our business.

Federal False Claims Act

The federal False Claims Act prohibits knowingly filing or causing the filing of a false claim or the knowing use of false statements to obtain payment from the federal government. A claim that is filed pursuant to an unlawful kickback may be a false claim under this law. When an entity is determined to have violated the False Claims Act, it may be required to pay up to three times the actual damages sustained by the government, plus mandatory civil penalties for each separate false claim. Private individuals can file suits under the False Claims Act on behalf of the government. These lawsuits are known as “qui tam” actions, and the individuals bringing such suits, sometimes known as “relators” or, more commonly, “whistleblowers,” may share in any amounts paid by the entity to the government in fines or settlement. In addition, certain states have enacted laws modeled after the federal False Claims Act. Qui tam actions have increased significantly in recent years, causing greater numbers of healthcare companies to have to defend a false claim action, pay fines or be excluded from Medicare, Medicaid or other federal or state healthcare programs as a result of an investigation arising out of such action.

HIPAA

The Health Insurance Portability and Accountability Act of 1996, or HIPAA, created two new federal crimes: healthcare fraud and false statements relating to healthcare matters. The healthcare fraud statute prohibits knowingly and willfully executing, or attempting to execute, a scheme to defraud any healthcare benefit program, including private payers. A violation of this statute is a felony and may result in fines, imprisonment or exclusion from government-sponsored programs. The false statements statute prohibits knowingly and willfully falsifying, concealing or covering up a material fact or making any materially false, fictitious or fraudulent statement in connection with the delivery of or payment for healthcare benefits, items or services. A violation of this statute is a felony and may result in fines or imprisonment.

HIPAA also protects the security and privacy of individually identifiable health information maintained or transmitted by healthcare providers, health plans and healthcare clearinghouses and their business associates. HIPAA restricts the use and disclosure of patient health information, including patient records. Although we believe that HIPAA does not apply to us directly, most of our customers have significant obligations under HIPAA, and we intend to cooperate with our customers and others to ensure compliance with HIPAA with respect to patient information that comes into our possession. Failure to comply with HIPAA obligations can result in civil fines and/or criminal penalties. Some states have also enacted rigorous laws or regulations protecting the security and privacy of patient information. If we fail to comply with these laws and regulations, we could face additional sanctions.

Patient Protection and Affordable Care Act and the Health Care and Education Reconciliation Act

In March 2010, Congress enacted the Patient Protection and Affordable Care Act and the Health Care and Education Reconciliation Act, or together, the Affordable Care Act. The law includes provisions that, among other things, reduce or limit Medicare reimbursement, require all individuals to have health insurance (with limited exceptions) and impose increased taxes. Specifically, the law requires the medical device industry to subsidize healthcare reform in the form of a 2.3% excise tax on United States sales of most medical devices beginning in 2013. We began paying the medical device excise tax in January 2013. We expect that the excise tax will continue to impact our operating expenses in the future. Because many other parts of the Affordable Care Act remain subject to implementation, the long-term impact to us is uncertain. The new law or any future legislation could reduce medical procedure volumes, lower reimbursement for our products, and impact the demand for our products or the prices at which we sell our products.

The Affordable Care Act also includes provisions known as the Physician Payments Sunshine Act, or PPSA, which requires manufacturers of drugs, biologics, devices and medical supplies covered under Medicare and Medicaid to record any transfers of value to physicians and teaching hospitals and to report this data to CMS, for subsequent public disclosure. Similar reporting requirements have also been enacted in several states, and an increasing number of countries worldwide either have adopted or are considering similar laws requiring transparency of interactions with healthcare professionals. Particularly, some states such as Massachusetts and Vermont impose an outright ban on certain gifts to physicians. Failure to report appropriate data may result in civil or criminal fines and/or penalties. We have reported the information as required by the PPSA for the period from August 1, 2013 through December 31, 2014.

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Additionally, the compliance environment is changing, with more states, such as California, Connecticut, Nevada and Massachusetts, mandating implementation of compliance programs, compliance with industry ethics codes, and spending limits, and other states, such as Vermont, requiring reporting to state governments of gifts, compensation and other remuneration to physicians. The shifting regulatory environment, along with the requirement to comply in multiple jurisdictions with different compliance and reporting requirements, increases the possibility that a company may run afoul of one or more laws.

International Regulation

We are also subject to regulation in each of the foreign countries in which we sell our products. Many of the regulations applicable to our products in these countries are similar to those of the FDA. The European Union requires that our medical devices comply with the Medical Device Directive or the Active Implantable Medical Device Directive, which includes quality system and CE certification requirements. To obtain a CE Mark in the European Union, defined products must meet minimum standards of safety and quality (i.e., the essential requirements) and then undergo an appropriate conformity assessment procedure. A Notified Body assesses the quality management systems of the manufacturer and the product conformity to the essential and other requirements within the Medical Device Directive. In the European Union, we are also required to maintain certain ISO certifications in order to sell our products. Our Impella 2.5, Impella 5.0, Impella LD, Impella CP, Impella RP, AB5000, BVS 5000, IAB, iPulse console and Portable Driver are all approved under CE mark and are available for sale in the European Union. We are also subject to regulations and periodic review from various regulatory bodies in Canada, Japan and other countries where we sell our products. Lack of regulatory compliance in any of these jurisdictions could limit our ability to distribute products in these countries.

Foreign Corrupt Practices Act

The U.S. Foreign Corrupt Practices Act and similar worldwide anti-bribery laws in non-U.S. jurisdictions generally prohibit companies and their intermediaries from making improper payments to foreign government officials for the purpose of obtaining or retaining business. Many of our customer relationships outside of the United States are, either directly or indirectly, with governmental entities and employees (such as physicians) and are therefore subject to various anti-bribery laws. Although our corporate policies mandate compliance with these anti-bribery laws, we operate in many parts of the world that have experienced governmental corruption to some degree, and in certain circumstances strict compliance with anti-bribery laws may conflict with local customs and practices. Our internal control policies and procedures may not always protect us from reckless or criminal acts committed by our employees or agents. Violations of these laws, or allegations of such violations, could disrupt our business and result in a material adverse effect on our business, results of operations and financial condition.

Other Regulations

We are also subject to various international, federal, state and local laws and regulations relating to such matters as safe working conditions, laboratory and manufacturing practices and the use, handling and disposal of hazardous or potentially hazardous substances used in connection with our research and development and manufacturing activities. Specifically, the manufacture of our biomaterials is subject to compliance with federal environmental regulations and by various state and local agencies. Although we believe we are in compliance with these laws and regulations in all material respects, we cannot provide assurance that we will not be required to incur significant costs to comply with these and other laws or regulations in the future.

Seasonality

Our quarterly net sales are influenced by many factors, including new product introductions, acquisitions, regulatory approvals, patient and physician holiday schedules, and other factors. Net sales in the first half of our fiscal year are typically lower than the second half of our fiscal year due to the seasonality of the United States and European markets, where summer vacation schedules normally result in fewer medical procedures.

Employees

As of March 31, 2015, we had 589 full-time employees, including:

• 123 in product engineering, research and development, and regulatory;

• 235 in sales, clinical support, marketing, field service and related support;

• 174 in manufacturing; and

• 57 in general and administration.

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We routinely enter into contractual agreements with our employees, which typically include confidentiality and non-competition commitments. Our employees are not represented by unions. We consider our employee relations to be good. If we were unable to attract and retain qualified personnel in the future, our operations could be negatively impacted.

ITEM 1A. RISK FACTORS

Investing in our common stock involves a high degree of risk. Before making an investment decision, you should carefully consider these risks as well as the other information we include or incorporate by reference in this report, including our consolidated financial statements and the related notes. The risks and uncertainties we have described are not the only ones we face. If any of these risks materializes, the trading price of our common stock could fall and you could lose all or part of your investment.

This section includes or refers to forward-looking statements. You should read the explanation of the qualifications and limitations of such forward-looking statements discussed at the beginning of the report.

Risks Related to Our Business

If we fail to obtain and maintain necessary governmental approvals for our products and indications, we may be unable to market and sell our products in certain jurisdictions.

Medical devices such as ours are extensively regulated by the FDA in the U.S. and by other federal, state, local and foreign authorities. Governmental regulations relate to the testing, development, manufacturing, labeling, design, sale, promotion, distribution, importing, exporting and shipping of our products. In the U.S., before we can market a new medical device, or a new use of, or claim for, or significant modification to, an existing product, we must generally first receive either PMA approval or 510(k) clearance from the FDA. Both of these processes can be expensive and lengthy and entail significant expenses, primarily related to clinical trials. The FDA’s 510(k) clearance process usually takes between three to twelve months, but it can often last longer.

The process of obtaining a PMA approval is much more costly and uncertain than the 510(k) clearance process. It generally takes between one to three years, or even longer, from the time the PMA application is submitted to the FDA. We cannot assure you that any regulatory clearances or approvals, either foreign or domestic, will be granted on a timely basis, if at all. If we are unable to obtain regulatory approvals or clearances for use of our products under development, or if the patient populations for which they are approved are not sufficiently broad, the commercial success of these products could be limited. The FDA may also limit the claims that we can make about our products. Our devices will increasingly be subject to the PMA and HDE processes as it converts its Impella products from 510(k) clearance to the PMA approvals which were called for under the FDA 515 program. The FDA has indicated it will allow for all Impella products to remain on the market while this conversion takes place. Once approved, any significant modifications to the design, materials, or intended use of those devices will require FDA approval through PMA or HDE supplemental applications, and the devices will be subject to more burdensome regulatory reporting requirements than they have been as 510(k) cleared devices.

If we do not receive FDA approval or clearance for one or more of our products, we will be unable to market and sell those products in the U.S. which would have a material adverse effect on our operations and prospects.

We intend to market our products in international markets, including the European Union, Canada, and Japan. Approval processes differ among those jurisdictions and approval in the U.S. or any other single jurisdiction does not guarantee approval in any other jurisdiction. Obtaining foreign approvals could involve significant delays, difficulties and costs for us and could require additional clinical trials.

If the FDA or another regulatory or enforcement agency determines that we have promoted off-label use of our products, we may be subject to various penalties, including civil or criminal penalties. We have received an administrative subpoena from the U.S. Department of Justice which is conducting an investigation that is focused on our marketing and labeling of the Impella 2.5 device.

The FDA, the U.S. Department of Justice, the Department of Health and Human Services, Office of the Inspector General and other regulatory or enforcement agencies actively enforce regulations prohibiting promotion of off-label use and the promotion of medical products for which marketing clearance has not been obtained. If any such agency determines that our promotional materials or training constitutes promotion of an unapproved use, it could request that we modify our training or promotional materials or subject us to regulatory enforcement actions, including the issuance of a warning letter, injunction, seizure, civil fine and criminal penalties. Although our policy is to refrain from statements that could be considered off-label promotion of our products, such agency could disagree and conclude that we have engaged in off-label promotion. In June 2011 we received a warning letter from the FDA stating that some of our promotional materials marketed the Impella 2.5 for uses that had not been approved by the FDA. We cooperated with the FDA and made changes to our promotional materials in response to the warning letter. However, in April 2012, we received a follow-up letter from the FDA stating that some of our promotional materials continued to market the Impella 2.5 in ways that are not compliant with FDA regulations. After additional actions by us, we

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received a close-out letter in February 2013 from the FDA with respect to this matter, which noted that the FDA’s Office of Compliance had completed its review of the corrective actions we took in response to the warning letter and that the concerns cited appeared to have been addressed. The close-out letter, however, provides no assurance that there may not be other occurrences that may be subject to regulatory or enforcement action.

On October 26, 2012, we were informed that the Department of Justice, United States Attorney’s Office for the District of Columbia was conducting an investigation, or the “Marketing and Labeling Investigation”, focused on our marketing and labeling of the Impella 2.5. On October 31, 2012, we accepted service of a subpoena related to this investigation seeking documents related to the Impella 2.5. We believe that we have substantially complied with the subpoena and have submitted the requested documents to the United States Attorney’s Office. On September 13, 2013, we entered into a tolling agreement with the United States Attorney’s Office, pursuant to which we and the United States Attorney’s Office mutually agreed to toll the applicable statutes of limitations for all criminal, civil and administrative offenses and violations that could be charged or claimed against us as of that date. On May 27, 2014 and January 30, 2015, we executed extensions of the tolling agreement. These extensions expired on March 2, 2015. The investigation is ongoing and we are unable to predict the ultimate outcome or determine whether a liability has been incurred or make an estimate of the reasonably possible liability, if any, that could result from any unfavorable outcome associated with this investigation. We have incurred significant expenses related to this investigation and we could continue to incur additional expenses in the future related to this action.

We may not be able to resolve these matters, or any similar matters that may come up in the future, without incurring penalties or facing significant consequences. Even if we are successful in resolving this matter without incurring penalties, responding to the subpoena has resulted and in the future could result in substantial costs and could significantly and adversely impact our reputation and divert management’s attention and resources, which could have a material adverse effect on our business, operating results, financial condition and ability to finance our operations.

Off-label use of our products may result in injuries that lead to product liability suits, which could be costly to our business.

The use of our products outside the indications cleared for use, or “off-label use,” may increase the risk of injury to patients. Clinicians may use our products for off-label uses, as the FDA does not restrict or regulate a clinician’s choice of treatment within the practice of medicine. Off-label use of our products may increase the risk of product liability claims against us. Product liability claims are expensive to defend and could divert our management’s attention and result in substantial damage awards against us.

We have historically been named as a party to purported stockholder class actions and a derivative action, and we may be named in additional litigation in the future, which may require significant management time and attention, and result in significant legal expenses and may result in an unfavorable outcome, which could have a material adverse effect on our business, operating results and financial condition.

On June 10, 2014, U.S. Court of Appeals for the First Circuit, or the First Circuit affirmed the dismissal by the U.S. District Court for the District of Massachusetts, or the District Court, of a previously disclosed complaint brought by an alleged stockholder as a derivative action instituted on our behalf against each of our directors. The complaint alleged that the directors breached their fiduciary duties to us and our stockholders in connection with disclosures related to our marketing and labeling of its Impella 2.5 product and sought damages in an unspecified amount. On February 6, 2015, the First Circuit, affirmed the dismissal by the District Court of a previously disclosed complaint brought by alleged purchasers of our common stock, on behalf of themselves and persons or entities that purchased or acquired our common stock between August 5, 2011 and October 31, 2012. The complaint related to two previously reported complaints that were filed on November 16 and 19, 2012 and alleged that we and certain of our officers violated federal securities laws in connection with disclosures related to our marketing and labeling of the Impella 2.5 product and sought damages in an unspecified amount. We do not expect any further activity related to this matter or the derivative action.

We may continue to be the subject of class action or derivative actions, which we intend to defend vigorously. We cannot be assured, however, that we will be successful. We may have to pay damage awards, indemnify our officers and directors from damage awards that may be entered against them or otherwise may enter into settlement arrangements in connection with such claims. Any such payments or settlement arrangements could have material adverse effects on our business, operating results or financial condition. Even if the plaintiffs’ claims are not successful, defending litigation could result in substantial costs and significantly and adversely impact our reputation and divert management’s attention and resources, which could have a material adverse effect on our business, operating results, financial condition and ability to finance our operations.

Our current and planned clinical trials may not begin on time, or at all, and may not be completed on schedule, or at all.

In order to obtain PMA approval and in some cases, 510(k) clearance, we may be required to conduct well-controlled clinical trials designed to test the safety and effectiveness of the product. In order to conduct clinical studies, we must generally receive an IDE for each device from the FDA. An IDE allows us to use an investigational device in a clinical trial to collect data on safety and effectiveness that will support an application for premarket approval or 510(k) clearance from the FDA.

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Conducting clinical trials is a long, expensive and uncertain process that is subject to delays and failure at any stage. Clinical trials can take months or years to complete. The commencement or completion of any of our clinical trials may be delayed or halted for numerous reasons, including:

• the FDA may not approve a clinical trial protocol or a clinical trial, or may place a clinical trial on hold;

• subjects may not enroll in clinical trials at the rate we expect and/or subjects may not be followed-up on at the rate we expect;

• subjects may experience adverse side effects or events related or unrelated to our products;

• third-party clinical investigators may not perform our clinical trials on our anticipated schedule or consistent with the clinical trial protocol and good clinical practices, or other third-party organizations may not perform data collection and analysis in a timely or accurate manner;

• the interim results of any of our clinical trials may be inconclusive or negative;

• regulatory inspections of our clinical trials may require us to undertake corrective action or suspend or terminate our clinical trials if investigators find us not to be in compliance with regulatory requirements;

• 510(k) clearance of our devices may have the effect of slowing down the progress of related clinical trials since physicians can use our cleared devices commercially outside of the trials;

• our manufacturing process may not produce finished products that conform to design and performance specifications expected with the clinical trial; or

• governmental regulations or administrative actions may change and impose new requirements, particularly with respect to reimbursement for products used in clinical trials.

The results of pre-clinical studies do not necessarily predict future clinical trial results and previous clinical trial results may not be repeated in subsequent clinical trials. We may suffer delays and cost overruns, and terminate manufacturing of certain of our products despite achieving promising results in pre-clinical testing or early clinical testing. In addition, the data obtained from clinical trials may be inadequate to support approval or clearance of a submission. The FDA may disagree with our interpretation of the data from our clinical trials, or may find the clinical trial design, conduct or results inadequate to demonstrate the safety and effectiveness of the product candidate. The FDA may also require us to conduct additional pre-clinical studies or clinical trials which could further delay approval of our products. The FDA or other international regulatory agencies will require post-market studies which can be burdensome and expensive. Per our PMA approval, the FDA has required that we conduct a single-arm, post approval study on the Impella 2.5, collecting data on high-risk PCI patients. The study will be a prospective, multi-center study comprised of 369 patients from 70 sites supported with the Impella 2.5 system. If we are unable to receive FDA approval of an IDE to conduct clinical trials or the trials are halted by the FDA or others or if we are unsuccessful in receiving FDA approval of a product candidate, we would not be able to sell or promote the product candidate in the U.S., which could seriously harm our business. Moreover, we face similar risks in each jurisdiction in which we sell or propose to sell our products. If we make modifications to a product, whether in response to results of clinical testing or otherwise, we could be required to start our clinical trials over, which could cause serious delays that would adversely affect our results of operations. Even modest changes to certain components of our products could result in months or years of additional clinical trials.

Our products are subject to extensive regulatory requirements, including continuing regulatory review, which could affect the manufacturing and marketing of our products.

The FDA and other regulatory agencies continue to review products even after they have received initial approval. If and when the FDA or another regulatory agency clears or approves our products under development, the manufacture and marketing of these products will be subject to continuing regulation, including compliance with the FDA’s adverse event reporting requirements, prohibitions on promoting a product for unapproved uses, and QSR requirements, which obligate manufacturers, including third-party and contract manufacturers, to adhere to stringent design, testing, control, documentation and other quality assurance procedures during the design and manufacture of a device.

Any modification to an FDA-cleared device that could significantly affect its safety or effectiveness or that would constitute a major change in its intended use, requires a new 510(k) clearance or PMA approval. The FDA requires each manufacturer to make this determination in the first instance, but the FDA may review any such decision. Modifications of this type are common with new products. We anticipate that the first generation of each of our products will undergo a number of changes, refinements, enhancements and improvements over time. If the FDA requires us to seek clearance or approval for modification of a previously cleared product for which we have concluded that new clearances or approvals are unnecessary, we may be required to cease marketing or to recall the modified product until we obtain clearance or approval and we may be subject to significant regulatory fines or penalties, which could have a material adverse effect on our financial results and competitive position. We also cannot assure you that we will be successful in obtaining clearances or approvals for our modifications, if required. We and our third-party suppliers of product components are also subject to inspection and market surveillance by the FDA and other regulatory agencies for QSR and other requirements, the interpretation of which can change. Compliance with QSR and similar legal requirements can be difficult and expensive. Enforcement actions resulting from failure to comply with government requirements

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could result in fines, suspensions of approvals or clearances, recalls or seizure of products, operating restrictions or shutdown, and criminal prosecutions that could adversely affect the manufacture and marketing of our products. The FDA or another regulatory agency could withdraw a previously approved product from the market upon receipt of newly discovered information, including a failure to comply with regulatory requirements, the occurrence of unanticipated problems with products following approval, or other reasons, which could adversely affect our operating results.

Even after receiving regulatory clearance or approval, our products may be subject to product recalls which may harm our reputation and divert our managerial and financial resources.

The FDA and similar governmental authorities in other countries have the authority to order mandatory recall of our products or order their removal from the market if the government finds that our products might cause adverse health consequences or death. A government-mandated or voluntary recall by us could occur as a result of component failures, manufacturing errors or design defects, including labeling defects. We have in the past initiated voluntary recalls of some of our products and we could do so in the future. Any recall of our products may harm our reputation with customers and divert managerial and financial resources.

We depend on third-party reimbursement to our customers for market acceptance of our products. If third-party payers fail to provide appropriate levels of reimbursement for purchase and use of our products, our sales and profitability would be adversely affected.

Sales of medical devices largely depend on the reimbursement of patients’ medical expenses by government healthcare programs and private health insurers. Without the financial support of government reimbursement or third-party insurers’ payments for patient care, the market for our products will be limited. Medical products and devices incorporating new technologies are closely examined by governments and private insurers to determine whether the products and devices will be covered by reimbursement, and if so, the level of reimbursement which may apply.

We cannot be sure that additional third-party payers will cover and/or adequately reimburse sales of our products or other products under development, to enable us to sell them at profitable prices.

In addition, third-party payers are increasingly requiring evidence that medical devices are cost-effective and if we are unable to meet this requirement, the third-party payer may not reimburse the use of our products, which could reduce sales of our products to healthcare providers who depend upon reimbursement for payment. We also cannot be sure that third-party payers will continue the current level of reimbursement to physicians and medical centers for use of our products. Any reduction in the amount of this reimbursement could harm our business.

Changes in healthcare reimbursement systems in the U.S. and abroad could reduce our revenues and profitability.

In March 2010, the federal government enacted healthcare reform legislation. The legislation has changed the manner in which healthcare services are provided and paid for in the U.S. These changes may impact reimbursement for healthcare services, including reimbursement to hospitals and physicians. States may also enact further legislation that impacts Medicaid payments to hospitals and physicians. In addition, CMS, the federal agency responsible for administering the Medicare program in the U.S., has established payment levels for hospitals and physicians in line with the legislation, which can increase or decrease payment to such entities.

The healthcare reform legislation and any future legislative, regulatory and reimbursement initiatives or changes to the reimbursement for our products could adversely affect demand for our products and have a material adverse impact on our revenues. Our business and results of operations could therefore be adversely affected by the healthcare reform legislation as well as future healthcare reform or regulatory actions.

Internationally, medical reimbursement systems vary significantly from country to country, with some countries limiting medical centers spending through fixed budgets, regardless of levels of patient treatment, and other countries requiring application for, and approval of, government or third-party reimbursement. Even if we succeed in bringing our new products to market, uncertainties regarding future healthcare policy, legislation and regulation, as well as private market practices, could affect our ability to sell our products in commercially acceptable quantities at profitable prices.

We must comply with healthcare “fraud and abuse” laws, and we could face substantial penalties for non-compliance and be excluded from government healthcare programs, which would adversely affect our business, financial condition and results of operations.

Certain federal and state healthcare laws and regulations pertaining to fraud and abuse and patients’ rights may be applicable to our business. We may be subject to healthcare fraud and abuse regulation and patient privacy regulation by both the federal government and the states in which we conduct our business. The laws that may affect our ability to operate include:

• The federal healthcare program Anti-Kickback Statute, which prohibits, among other things, knowingly and willfully soliciting, receiving or providing remuneration, directly or indirectly, to induce (i) the referral of an individual, for an item or service, or (ii) the recommending, purchasing or ordering of a good or service, for which payment may be made under federal healthcare programs such as the Medicare and Medicaid programs;

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• The Federal False Claims Act, which prohibits, among other things, knowingly presenting, or causing to be presented, claims for payment from Medicare, Medicaid, or other third-party payers that are false or fraudulent, including claims made pursuant to an unlawful kickback, and which may apply to entities like us that promote medical devices, provide medical device management services and may provide coding and billing advice to customers;

• HIPAA, which prohibits executing a scheme to defraud any healthcare benefit program or making false statements relating to healthcare matters and which also imposes certain requirements relating to the privacy, security and transmission of individually identifiable health information; and

• State law equivalents of each of the above federal laws, such as anti-kickback and false claims laws that may apply to items or services reimbursed by any third-party payer, including commercial insurers, and state laws governing the privacy and security of health information in certain circumstances, many of which differ in significant ways from state to state and often are not preempted by HIPAA, thus complicating compliance efforts.

Additionally, the compliance environment is changing, with more states, such as California, Connecticut, Nevada and Massachusetts, mandating implementation of compliance programs, compliance with industry ethics codes, and spending limits, and other states, such as Vermont, requiring reporting to state governments of gifts, compensation and other remuneration to physicians. The Physician Payments Sunshine Act, or PPSA, which was signed into law on March 23, 2010, requires manufacturers of drug, device, biologics, and medical supplies covered under Medicare, Medicaid, or State Children’s Health Insurance Program, or SCHIP, to report payments made to physicians and teaching hospitals on an annual basis to the HHS. These laws all provide for penalties for non-compliance. The shifting regulatory environment, along with the requirement to comply with multiple jurisdictions with different compliance and reporting requirements, increases the possibility that we may run afoul of one or more laws.

Many of these requirements are new and their application is uncertain, and regulatory guidance is limited. We could face enforcement action, fines and other penalties and could receive adverse publicity, all of which could harm our business, if it is alleged that we have failed to fully comply with such laws and regulations. Similarly, if the physicians or other providers or entities that we do business with are found not to comply with applicable laws, they may be subject to sanctions, which could also have a negative impact on our business.

On April 25, 2014, we received a subpoena from the Boston regional office of HHS, OIG requesting materials relevant to our reimbursement of expenses and remuneration to healthcare providers for a six month period from July 2012 through December 2012 in connection with a civil investigation under the False Claims Act (the “FCA Investigation” and, together with the Marketing and Labeling Investigation, the “DOJ Investigations”). We submitted the requested documents to HHS and believe that we have substantially complied with the subpoena. On November 6, 2014, we received notice from the Department of Justice, United States Attorney’s Office for the District of Massachusetts in the form of a Civil Investigative Demand (“CID”) requesting additional materials relating to this matter for the time period of January 1, 2012 through December 31, 2013. We are currently in the process of responding to the additional requests for information contained in the CID and intend to continue to cooperate with the U.S. Attorney’s Office in connection with the FCA investigation.

We depend on Impella products for a significant portion of our revenues.

We derive, and expect to continue to derive, most of our revenues from sales of our Impella products. While we cannot fully predict what level of revenues our Impella products will generate, we anticipate that Impella product sales will continue to account for a significant portion of our revenues in the foreseeable future. Implementation of our business strategy depends on continued sales of our Impella products. Our ability to generate sales of our Impella products may be impaired by the factors described below:

• our failure to obtain approvals from the FDA and foreign regulatory authorities or to comply with government regulations, or the withdrawal of market clearance or the taking of other enforcement actions;

• lack of acceptance or continued acceptance by physicians;

• our reliance on specialized suppliers for certain components and materials;

• manufacturing or quality control problems;

• our inability to protect our proprietary technologies or an infringement of others’ patents;

• the loss of a distributor or a distributor’s failure to perform its obligations;

• our failure to compete successfully against our existing or potential competitors;

• additional risks associated with selling in international markets;

• long and variable sales and deployment cycles;

• failure by third-party payers to provide appropriate levels of reimbursement;

• our failure to comply with federal and state regulations; and

• product liability claims.

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If we fail to compete successfully against our existing or potential competitors, our sales or operating results may be harmed.

Competition from other companies offering circulatory care products is intense and subject to rapid technological change and evolving industry requirements and standards. We compete with companies that have substantially greater or broader financial, product development, sales and marketing resources and experience than we do. Our ability to compete effectively depends upon our ability to distinguish our company and our products from our competitors and their products. Factors affecting our competitive position include:

• the availability of other products and procedures that are technically equivalent or superior to our products, and which may be sold at lower prices;

• product performance and design;

• product safety;

• sales, marketing and distribution capabilities;

• comparable clinical outcomes;

• success and timing of new product development and introductions;

• penetration into existing and new geographic markets; and

• intellectual property protection.

Our customers are primarily hospitals that have limited budgets. As a result, our products compete against a broad range of medical devices and other therapies for these limited funds. Our success will depend in large part upon our ability to enhance our existing products, to develop new products to meet regulatory and customer requirements and to achieve market acceptance for our products. We believe that important competitive factors with respect to the development and commercialization of our products include the relative speed with which we can develop products, establish clinical utility, complete clinical trials and regulatory approval processes, obtain and protect reimbursement, maintain cost effectiveness for our products, and supply commercial quantities of our products to our customers.

Advances in medical technology, biotechnology and pharmaceuticals may reduce the size of the potential markets for our products or render those products obsolete. We are aware of other heart replacement device research efforts in the U.S., Canada, Europe and Japan. In addition, there are a number of companies; including Getinge, Thoratec Corporation, CardiacAssist, HeartWare International, Terumo Heart and several early-stage companies, that are developing heart assist products, including implantable left ventricular assist devices and miniaturized rotary ventricular assist devices.

If we do not effectively manage our growth, we may be unable to successfully develop, market and sell our products.

Our future revenue and operating results will depend on our ability to manage the anticipated growth of our business. We have experienced significant growth in recent years in the scope of our operations and we have increased our employee headcount. This growth has placed significant demands on our management as well as our financial and operations resources. In order to achieve our business objectives, we will need to continue to grow. However, continued growth presents numerous challenges, including:

• developing our global sales and marketing infrastructure and capabilities;

• expanding manufacturing capacity, maintaining quality and increasing production;

• increasing our foreign and domestic regulatory compliance capabilities;

• implementing appropriate operational, financial and IT systems and internal controls;

• identifying, attracting and retaining qualified personnel, particularly experienced clinical staff; and

• training, managing and supervising our personnel worldwide.

Any failure to manage our growth effectively could impede our ability to successfully develop, market and sell our products, which could seriously harm our business.

The demand for some of our products and products under development is unproven, and we may be unable to successfully commercialize our products.

Our products and products under development may not enjoy commercial acceptance or success, which could adversely affect our business and operational results. We need to create markets for our Impella products and other existing products, as well as other new or future products, including achieving market acceptance among physicians, hospitals, patients and third-party payers. In particular, we need to gain acceptance of our Impella products among interventional cardiologists. The obstacles we will face in trying to create successful commercial markets for our products include:

• limitations inherent in first-generation devices, and our potential inability to develop successive improvements, including increases in service life and improvements in the ease of use of our products;

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• introduction by other companies of new treatments, products and technologies that compete with our products;

• timing and amount of reimbursement for these products, if any, by third-party payers;

• potential reluctance of clinicians to obtain adequate training to use our products;

• cost of our products; and

• potential reluctance of physicians, patients and society as a whole to accept medical devices that replace or assist the heart and risk of mechanical failure inherent in such devices.

Our future success depends in part on the development of new circulatory assist products, and our development efforts may not be successful.

We are devoting most of our research and development and regulatory efforts, and significant financial resources, to the development of our Impella products and product extensions of existing commercial products and new products. In July 2014, we acquired ECP, a German limited liability company engaged in the research, development, prototyping and pre-serial production of a percutaneous expandable catheter pump which increases blood circulation from the heart with an external drive shaft. The development of new products and product extensions presents enormous challenges in a variety of areas, including blood compatible surfaces, blood compatible flow, manufacturing techniques, pumping mechanisms, physiological control, energy transfer, anatomical fit and surgical techniques. We may be unable to overcome all of these challenges, which could adversely affect our results of operations and prospects.

The commercial success of our products will require acceptance by surgeons and interventional cardiologists, a limited number of whom have significant influence over medical device selection and purchasing decisions.

We may achieve our business objectives only if our products are accepted and recommended by leading cardiovascular surgeons and interventional cardiologists, whose decisions are likely to be based on a determination by these clinicians that our products are safe and cost-effective and represent acceptable methods of treatment. Although we have developed relationships with leading cardiac surgeons, the commercial success of Impella and our other products will require that we also develop relationships with leading interventional cardiologists in cath labs. We cannot assure you that we can maintain our existing relationships and arrangements or that we can establish new relationships in support of our products. If cardiovascular surgeons and interventional cardiologists do not consider our products to be adequate for the treatment of our target cardiac patient population or if a sufficient number of these clinicians recommend and use competing products, it would seriously harm our business.

Expansion into hospitals that have not historically used our products may incur long sales and training cycles that may cause our product sales and operating results to vary significantly from quarter-to-quarter.

Our products have lengthy sales cycles and we may incur substantial sales and marketing expenses and expend significant effort without making a sale. Even after making the decision to purchase our Impella products, our customers often deploy our products slowly. In addition, cardiac centers that buy the majority of our products are usually led by cardiac surgeons who are heavily recruited by competing centers or by centers looking to increase their profiles. When one of these surgeons moves to a new center we sometimes experience a temporary but significant reduction in purchases by the hospital that the surgeon previously worked in while it replaces its lead surgeon. As a result, our product sales and operating results may vary significantly from quarter to quarter. In addition, product purchases often lag initial expressions of interest in our product by new centers as training of the products and internal hospital administrative procedures are typically required prior to the initial implant procedures.

The training required for clinicians to use our products could reduce the market acceptance of our products and reduce our revenue.

Clinicians must be trained to use our products proficiently. It is critical to the success of our business that we ensure that there are a sufficient number of clinicians familiar with, trained on and proficient in the use of our products. Convincing clinicians to dedicate the time and energy necessary to obtain adequate training in the use of our products is challenging and we may not be successful in these efforts. If clinicians are not properly trained, they may misuse or ineffectively use our products. Any improper use of our products may result in unsatisfactory outcomes, patient injury, negative publicity or lawsuits against us, any of which could harm our reputation and affect future product sales. Furthermore, our inability to educate and train clinicians to use our products may lead to lower demand for our products.

If we are unable to develop additional, high-quality manufacturing capacity, our growth may be limited and our business could be seriously harmed.

To be successful, we believe we will need to increase our manufacturing capacity. We do not have experience in manufacturing our Impella products in the commercial quantities that might be required to meet potential demand, nor do we have experience manufacturing our other products in large quantities. We may encounter difficulties in scaling up manufacturing of our products, including problems related to

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product yields, quality control and assurance, component and service availability, dependable sources of supply, adequacy of internal control policies and procedures and lack of skilled personnel. If we cannot hire, train and retain enough experienced and capable scientific and technical workers, we may not be able to manufacture sufficient quantities of our existing or future products on-time and at an acceptable cost, which could limit market acceptance of our products or otherwise damage our business. In order for our manufacturing to meet the expected demand for our Impella products, we have been implementing process improvements on the Impella production line at our manufacturing facilities in Aachen, Germany and Danvers, Massachusetts to increase the output that we can produce at the facility. In addition to programs designed to further increase yield and capacity levels, we have expanded manufacturing employment in Aachen and Danvers and have increased manufacturing floor space in Danvers and Aachen. We have relocated selected Impella sub-assembly production to our manufacturing facility in Danvers, Massachusetts and we began production of the Impella CP in Danvers to support manufacturing at our main Impella production facility in Aachen. We continue to work on initiatives to expand our Impella manufacturing capacity in both Aachen and Danvers. We are also working with our existing suppliers and new suppliers to ensure we are able to have sufficient inventory and sub assembly parts as we increase our manufacturing capability to support growing demand. If we are unable to implement these process improvements on a timely basis, it could inhibit our revenue growth.

Any failure to achieve and maintain the high manufacturing standards that our products require may seriously harm our business.

Our products require precise, high-quality manufacturing. Achieving precision and quality control requires skill and diligence by our personnel. Any failure to achieve and maintain these high manufacturing standards, including the incidence of manufacturing errors, design defects or component failures, could result in patient injury or death, product recalls or withdrawals, delays or failures in product testing or delivery, cost overruns or other problems that could seriously hurt our business. Despite our very high manufacturing standards, we cannot completely eliminate the risk of errors, defects or failures. If we are unable to manufacture our products in accordance with necessary quality standards, or if we are unable to procure additional high-quality manufacturing facilities, our business and results of operations may be negatively affected.

If we cannot attract and retain key management, scientific, sales and other personnel we need, we will not be successful.

We depend heavily on the contributions of the principal members of our business, financial, technical, sales and support, regulatory and clinical, operating, manufacturing and administrative management and staff, many of whom would be difficult to replace. Our key personnel include our senior officers, many of whom have very specialized scientific, medical or operational knowledge. The loss of the service of any of the key members of our senior management team may significantly delay or prevent our achievement of our business objectives. Our ability to attract and retain qualified personnel, consultants and advisors is critical to our success. For example, many of the members of our clinical staff are registered nurses with experience in the surgery suite or cath lab, of which only a limited number of whom seek employment with a company like ours. Competition for skilled and experienced personnel in the medical devices industry is intense. We face competition for skilled and experienced management, scientific, clinical, engineering and sales personnel from numerous medical device and life sciences companies, universities, governmental entities and other research institutions. If we lose the services of any of the principal members of our management and staff, or if we are unable to attract and retain qualified personnel in the future, especially scientific and sales personnel, our business could be adversely affected.

If our suppliers cannot provide the components we require, our ability to manufacture our products could be harmed.

We rely on third-party suppliers to provide us with some components used in our existing products and products under development. For example, we outsource the manufacturing of most of our consoles other than final assembly and testing and the sterilization process for our products. Relying on third-party suppliers makes us vulnerable to component part failures or obsolescence and to interruptions in supply, either of which could impair our ability to conduct clinical tests or to ship our products to our customers on a timely basis. Using third-party vendors makes it difficult and sometimes impossible for us to test fully certain components, such as components on circuit boards, maintain quality control, manage inventory and production schedules and control production costs. Manufacturers of our product components may be required to comply with the FDA or other regulatory manufacturing regulations and to satisfy regulatory inspections in connection with the manufacture of the components. Any failure by a supplier to comply with applicable requirements could lead to a disruption in supply. Vendor lead times to supply us with ordered components vary significantly and often can exceed six months or more. Both now and as we expand our manufacturing capacity, we cannot be sure that our suppliers will furnish us required components when we need them or be able to provide us inventory materials to support our expected growth in demand for our products. These factors could make it more difficult for us to manufacture our products effectively and efficiently and could adversely impact our results of operations.

Some of our suppliers may be the only source for a particular component, which makes us vulnerable to significant cost increases. We have many foreign suppliers for some of our parts in which we are subject to currency exchange rate volatility. Some of our vendors are small in size and may have difficulty supplying the quantity and quality of materials required for our products as our business grows. Vendors that are the sole source of certain products may decide to limit or eliminate sales of certain components due to product liability or other concerns and we might not be able to find a suitable replacement for those products. Our inventory may run out before we find alternative suppliers and we might be forced to purchase substantial inventory, if available, to last until we are able to qualify an alternate supplier. If we cannot obtain a necessary component, we may need to find, test and obtain regulatory approval or clearance for a replacement component, produce the component ourselves or redesign the related product, which would cause significant delay and could increase our manufacturing costs. Any of these events could adversely impact our results of operations.

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General economic and political conditions could have a material adverse effect on our business.

External factors can affect our profitability and financial condition. Such external factors include general domestic and global economic conditions, such as interest rates, foreign currency exchange rates, tax rates and factors affecting global economic stability, and the political environment regarding healthcare in general. While the economic environment has shown some signs of improvement, the strength and timing of any economic recovery remains uncertain, and we cannot predict to what extent the global economic slowdown may negatively impact our business. For example, an increase in interest rates could result in an increase in our borrowing costs and could otherwise restrict our ability to access the capital markets. Negative conditions in the credit and capital markets could impair our ability to access the financial markets for working capital or other funds, and could negatively impact our ability to borrow. Such conditions could result in decreased liquidity and impairments in the carrying value of our investments, and could adversely affect our results of operations and financial condition. These and other conditions could also adversely affect our customers, and may impact their ability or decision to purchase our products or make payments on a timely basis.

We do business with foreign governments outside the United States. A number of these countries, including certain European countries, have experienced deterioration in credit and economic conditions. These conditions have resulted in, and may continue to result in, a reduction in the number of procedures that use our products and an increase in the average length of time that it takes to collect accounts receivable outstanding in these countries.

We may not be successful in expanding our direct sales activities into international markets.

We are seeking to expand our international sales of our products by recruiting direct sales and support teams outside the U.S. Our international operations in Germany, France, Canada, Japan and the United Kingdom are or will be subject to a number of risks, which may vary from the risks we experience in the U.S., including:

• the need to obtain regulatory approvals in foreign countries before our products may be sold or used;

• the need to procure reimbursement for our products in each foreign market;

• the generally lower level of reimbursement available in foreign markets relative to the U.S.;

• longer sales cycles;

• limited protection of intellectual property rights;

• difficulty and delays in collecting accounts receivable;

• different income tax and sales tax environments;

• difficulty in supporting patients using our products;

• different payroll, employee benefits and statutory requirements;

• fluctuations in the values of foreign currencies; and

• political and economic instability.

If we are unable to effectively expand our sales activities in international markets, our results of operations could be negatively impacted.

We intend to expand our reliance on distributors in some international markets and poor performance by a distributor could reduce our sales and harm our business.

We rely on distributors to market and sell our products in certain parts of Europe, Asia, South America and the Middle East. Many of these distributors have the exclusive right to distribute our products in their territory. We may hire distributors to market our products in additional international markets. Our success in these markets will depend almost entirely upon the efforts of our distributors, over whom we have little or no control. If a distributor does not market and sell our products aggressively and maintain a continued focus on the sale and distribution of our products, we could lose sales and impair our ability to compete in that market. We are also subject to credit risk associated with shipments to our distributors and this could negatively impact our financial condition and liquidity in the future.

Many of our customer relationships outside of the United States are, either directly or indirectly, with governmental entities, and we could be adversely affected by violations of the United States Foreign Corrupt Practices Act and similar worldwide anti-bribery laws outside the United States.

The U.S. Foreign Corrupt Practices Act and similar worldwide anti-bribery laws in non-U.S. jurisdictions generally prohibit companies and their intermediaries from making improper payments to foreign government officials for the purpose of obtaining or retaining business. Many of our customer relationships outside of the United States are, either directly or indirectly, with governmental entities and employees

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(such as physicians) and are therefore subject to such anti-bribery laws. Although our corporate policies mandate compliance with these anti- bribery laws, we operate in many parts of the world that have experienced governmental corruption to some degree, and in certain circumstances strict compliance with anti-bribery laws may conflict with local customs and practices. Our internal control policies and procedures may not always protect us from reckless or criminal acts committed by our employees or agents. Violations of these laws, or allegations of such violations, could disrupt our business and result in a material adverse effect on our business, results of operations and financial condition.

We have incurred losses in previous periods and it is possible that we may incur losses in future periods.

We have recognized net income of approximately $113.7 million, $7.4 million and $15.0 million for the years ended March 31, 2015, 2014 and 2013, respectively. The profitability we achieved in recent years may not be indicative of our ability to sustain profitability and it is possible that we may incur losses from operations in future periods. The increase in net income for the year ended March 31, 2015 was primarily due to the income tax benefit of $84.9 million primarily due to the release of the valuation allowance on certain of our deferred tax assets in the quarter ended March 31, 2015. Although we have been profitable in recent years, it is possible that we may incur losses in future periods. Any losses incurred in the future may result primarily from, among other things:

• the expansion of our global distribution network;

• investments in new markets such as Japan;

• ongoing product and clinical development;

• costs related to new business development initiatives;

• legal and other expenses related to our compliance with the subpoena received from the U.S. Department of Justice in October 2012, the subpoena we received from the Boston regional office of the U.S. Department of Health and Human Services, Office of Inspector General in April 2014, civil investigative demand, or CID we received from the United States Attorney’s Office for the District of Massachusetts in November 2014 and our defense of other legal claims;

• U.S. medical device taxes on the sales of certain of our products in the U.S.;

• costs associated with hiring additional personnel, performing clinical trials, continuing our research and development relating to our products under development, seeking regulatory approvals and, if we receive these approvals, commencing commercial manufacturing and marketing activities; and

• Significant expenditures necessary to market and manufacture in commercial quantities our approved circulatory care products.

• The amount of these expenditures is difficult to forecast accurately and cost overruns may occur.

Our operating results may fluctuate unpredictably.

Historically, our annual and quarterly operating results have fluctuated widely and we expect these fluctuations to continue. Among the factors that may cause our operating results to fluctuate are:

• the timing of customer orders and deliveries;

• competitive changes, such as price changes or new product introductions that we or our competitors may make;

• the timing of regulatory actions, such as product approvals or recalls;

• costs we incur developing and testing our Impella heart pumps and other products;

• costs we incur in anticipation of future sales, such as inventory purchases, expansion of manufacturing facilities, or establishment of international sales offices;

• costs we incur in connection with the class action suits and derivative action that has been filed against us;

• costs we incur in connection with the investigation being conducted by the DOJ;

• additional taxes, such as the Medical Device tax;

• timing of certain marketing programs and events;

• impact of any businesses or technologies we may acquire in the future;

• economic conditions in the healthcare industry; and

• efforts by governments, insurance companies and others to contain healthcare costs, including changes to reimbursement policies.

We believe that period-to-period comparisons of our historical results are not necessarily meaningful, and investors should not rely on them as an indication of our future performance. To the extent we experience the factors described above, our future operating results may not meet the expectations of securities analysts or investors from time to time, which may cause the market price of our common stock to decline.

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We may undergo an “ownership change” for U.S. federal income tax purposes, which would limit our ability to utilize net operating losses from prior tax years.

If we undergo an “ownership change” for U.S. federal income tax purposes, our ability to utilize net operating loss carry-forwards from prior years to reduce taxable income in future tax years might be limited by operation of the Internal Revenue Code, either by limiting the amount of net operating losses that can be utilized to offset taxable income in a given year, or in total over the entire carry-forward period. Certain changes in the ownership of our common stock may result in an ownership change sufficient to limit the availability of our net operating losses. We also have net operating loss carry-forwards in other countries outside of the U.S. and our ability to use those losses in the future to offset taxable income could be limited by tax regulations in those countries.

We may not have sufficient funds to develop and commercialize our new products or make acquisitions of desirable companies, products or technologies.

The development, manufacture and sale of any medical device is very expensive and we may require additional funds to make acquisitions of desirable companies, products or technologies. We cannot be sure that we will have the necessary funds to develop and commercialize our new products or acquire companies, products, or technologies, or that additional funds will be available on commercially acceptable terms, if at all. If we are unable to obtain the necessary funding to support these efforts, our business may be adversely affected. We believe we have sufficient liquidity to finance our operations for the next fiscal year. We also may evaluate from time to time other financing alternatives as necessary to fund operations, and any equity or convertible debt financing may involve substantial dilution to our existing stockholders.

We own patents, trademarks, trade secrets, copyrights and other intellectual property and know-how that we believe gives us a competitive advantage. If we cannot protect our intellectual property and develop or otherwise acquire additional intellectual property, competition could force us to lower our prices, which could hurt our profitability.

Our intellectual property rights are and will continue to be a critical component of our success. A substantial portion of our intellectual property rights relating to the Impella products and other products under development is in the form of trade secrets, rather than patents. Unlike patents, trade secrets are only recognized under applicable law if they are kept secret by restricting their disclosure to third parties. We protect our trade secrets and proprietary knowledge in part through confidentiality agreements with employees, consultants and other parties. However, certain consultants and third parties with whom we have business relationships, and to whom in some cases we have disclosed trade secrets and other proprietary knowledge, may also provide services to other parties in the medical device industry, including companies, universities and research organizations that are developing competing products. In addition, some of our former employees who were exposed to certain of our trade secrets and other proprietary knowledge in the course of their employment may seek employment with, and become employed by, our competitors. We cannot be assured that consultants, employees and other third parties with whom we have entered into confidentiality agreements will not breach the terms of such agreements by improperly using or disclosing our trade secrets or other proprietary knowledge, that we will have adequate remedies for any such breach, or that our trade secrets will not become known to or be independently developed by our competitors. The loss of trade secret protection for technologies or know-how relating to our product portfolio and products under development could adversely affect our business and our prospects.

Our business position also depends in part on our ability to maintain and defend our existing patents and obtain, maintain, and defend additional patents and other intellectual property rights. We intend to seek additional patents, but our pending and future patent applications may not be approved, may not give us a competitive advantage, could be challenged by others, or if issued, could be deemed invalid or unenforceable. Patent prosecution, related proceedings, and litigation in the U.S. and in other countries may be expensive, time consuming and ultimately unsuccessful. In addition, patents issued by foreign countries may afford less protection than is available under U.S. patent law and may not adequately protect our proprietary information. Our competitors may independently develop proprietary technologies and processes that are the same as or substantially equivalent to ours or design around our patents. The expiration of patents on which we rely for protection of key products could diminish our competitive advantage and adversely affect our business and our prospects.

Companies in the medical device industry typically obtain patents and frequently engage in substantial intellectual property litigation. Our products and technologies could infringe on the rights of others. If a third-party successfully asserts a claim for infringement against us, we may be liable for substantial damages, be unable to sell products using that technology, or have to seek a license or redesign the related product. These alternatives may be uneconomical or impossible. Intellectual property litigation could be costly, result in product development delays and divert the efforts and attention of management from our business.

Product liability claims could damage our reputation and adversely affect our financial results.

The clinical use of medical products, even after regulatory approval, poses an inherent risk of product liability claims. We maintain limited product liability insurance coverage, subject to certain deductibles and exclusions. We cannot be sure that product liability insurance will be available in the future or will be available on acceptable terms or at reasonable costs, or that such insurance will provide us with adequate coverage against potential liabilities. Claims against us, regardless of their merit or potential outcome, may also hurt our ability to obtain physician endorsement of our products or expand our business. As we continue to introduce more products, we face an increased risk that a product liability claim will be brought against us.

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Some of our products are designed for patients who suffer from late-stage or end-stage heart failure, and many of these patients do not survive, even when supported by our products. There are many factors beyond our control that could result in patient death, including the condition of the patient prior to use of the product, the skill and reliability of physicians and hospital personnel using and monitoring the product and product maintenance by customers. However, the failure of the products we distribute for clinical testing or sale could give rise to product liability claims and negative publicity.

The risk of product liability claims is heightened when we sell products that are intended to support a patient until the end of life. The finite life of our products, as well as complications associated with their use, could give rise to product liability claims whether or not the products have extended or improved the quality of a patient’s life. If we have to pay product liability claims in excess of our insurance coverage, our financial condition will be adversely affected.

Quality problems can result in substantial costs and inventory write-downs.

Government regulations require us to track materials used in the manufacture of our products, so that if a problem is identified in one product it can be traced to other products that may have the same problem. An identified quality problem may require reworking or scrapping related inventory and recalling previous shipments. Because a malfunction in our products can be life-threatening, we may be required to recall and replace, free of charge, products already in the marketplace. Any quality problem could cause us to incur significant expenses, lead to significant write-offs, injure our reputation and harm our business and financial results.

Disruptions of critical information systems or material breaches in the security of our systems could harm our business, customer relations and financial condition.

We rely in part on information technology to store information, interface with customers, maintain financial accuracy, secure our data and accurately produce our financial statements. If our information technology systems do not effectively and securely collect, store, process and report relevant data for the operation of our business, whether due to equipment malfunction or constraints, software deficiencies or human error, our ability to effectively plan, forecast and execute our business plan and comply with applicable laws and regulations would be materially impaired. Any such impairment could have a material adverse effect on our results of operations, financial condition and the timeliness with which we report our operating results.

Our business requires us to use and store customer, vendor, employee and business partner and, in certain instances patient, personally identifiable information. We are subject to various domestic and international privacy and security regulations, including but not limited to HIPAA, which mandates, among other things, the adoption of uniform standards for the electronic exchange of information in common healthcare transactions, as well as standards relating to the privacy and security of individually identifiable health information, which require the adoption of administrative, physical and technical safeguards to protect such information. In addition, many states have enacted comparable laws addressing the privacy and security of health information, some of which are more stringent than HIPAA. If we fail to comply with these standards, we could be subject to criminal penalties and civil sanctions.

While we devote significant resources to network security, data encryption and other security measures to protect our systems and data, including our own proprietary information and the confidential and personally identifiable information of our customers, employees, business partners and patients, these measures cannot provide absolute security. The costs to us to eliminate or alleviate network security problems, bugs, viruses, worms, malicious software programs and security vulnerabilities could be significant, and our efforts to address these problems may not be successful, resulting potentially in the theft, loss, destruction or corruption of information we store electronically, as well as unexpected interruptions, delays or cessation of service, any of which could cause harm to our business operations. Moreover, if a computer security breach or cyber-attack affects our systems or results in the unauthorized release of proprietary or personally identifiable information, our reputation could be materially damaged and our operations could be impaired. We would also be exposed to a risk of loss or litigation and potential liability, which could have a material adverse effect on our business, results of operations and financial condition.

If we acquire other companies or businesses, we will be subject to risks that could hurt our business.

We may pursue acquisitions to obtain complementary businesses, products or technologies. Any such acquisition may not produce the revenues, earnings or business synergies that we anticipate and an acquired business, product or technology might not perform as we expect. Our management could spend a significant amount of time, effort and money in identifying, pursuing and completing the acquisition. If we complete an acquisition, we may encounter significant difficulties and incur substantial expenses in integrating the operations and personnel of the acquired company into our operations. In particular, we may lose the services of key employees of the acquired company and we may make changes in management that impair the acquired company’s relationships with employees, vendors and customers. Additionally, we may acquire development-stage companies that are not yet profitable and which require continued investment, which could decrease our future earnings.

Any of these outcomes could prevent us from realizing the anticipated benefits of an acquisition. To pay for an acquisition, we might use stock or cash. Alternatively, we might borrow money from a bank or other lender. If we use stock, our stockholders would experience dilution of their ownership interests. If we use cash or debt financing, our financial liquidity would be reduced.

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If we include future milestones as part of the potential purchase price of an acquisition, as we did in connection with our 2014 acquisition of ECP, then we will have to estimate the value of these milestones each reporting period and any changes underlying these estimates with respect to expected timing or valuation of these milestones could have a volatile impact on our earnings.

Revisions to accounting standards and financial reporting and corporate governance requirements could result in changes to our standard practices and could require a significant expenditure of time, attention and resources, especially by senior management.

We must follow accounting standards and financial reporting and corporate governance requirements and tax laws set by the governing bodies and lawmakers in the U.S. and in other jurisdictions where we do business, as well as NASDAQ. From time to time, these governing bodies and lawmakers implement new and revised rules and laws. These new and revised accounting standards and financial reporting and corporate governance requirements may require changes to our financial statements, the composition of our Board of Directors, the responsibility and manner of operation of various board level committees and the information filed by us with the governing bodies. Our accounting practices that may be affected by changes in the accounting principles are as follows:

• accounting for revenue recognition;

• accounting for intangibles—goodwill and other;

• fair value measurement;

• accounting for income taxes;

• accounting for stock-based compensation;

• accounting for leases; and

• accounting for business combinations.

Implementing changes required by new standards, requirements or laws likely will require a significant expenditure of time, attention and resources. It is impossible to completely predict the impact, if any, on us of future changes to accounting standards and financial reporting and corporate governance requirements.

We use estimates, make judgments and apply certain methods in measuring the progress of our business in determining our financial results and in applying our accounting policies. As these estimates, judgments and methods change, our assessment of the progress of our business and our results of operations could vary.

The methods, estimates and judgments we use in applying our accounting policies have a significant impact on our results of operations. Such methods, estimates and judgments are, by their nature, subject to substantial risks, complexities, uncertainties and assumptions, and factors may arise over time that may lead us to change our methods, estimates and judgments. Changes in any of our assumptions may cause variation in our reporting and may adversely affect our reported financial results.

Environmental and health safety laws may result in liabilities, expenses and restrictions on our operations.

Federal, state, local and foreign laws regarding environmental protection, hazardous substances and human health and safety may adversely affect our business. Using hazardous substances in our operations exposes us to the risk of accidental injury, contamination or other liability from the use, storage, importation, handling, or disposal of hazardous materials. If our or our suppliers’ operations result in the contamination of the environment or expose individuals to hazardous substances, we could be liable for damages and fines, and any liability could significantly exceed our insurance coverage and have a material adverse effect on our financial condition. We maintain insurance for certain environmental risks, subject to substantial deductibles; however, we cannot assure you we can continue to maintain this insurance in the future at an acceptable cost or at all. Future changes to environmental and health and safety laws could cause us to incur additional expenses or restrict our operations.

Fluctuations in foreign currency exchange rates could result in declines in our reported sales and results of operations.

Because some of our international sales are denominated in local currencies and not in U.S. dollars, our reported sales and earnings are subject to fluctuations in foreign currency exchange rates, primarily the Euro. At present, we do not hedge our exposure to foreign currency fluctuations. As a result, sales and expenses occurring in the future that are denominated in foreign currencies may be translated into U.S. dollars at less favorable rates, resulting in reduced revenues and earnings.

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Risks Related to Our Common Stock

The market price of our common stock is volatile.

The market price of our common stock has fluctuated widely and may continue to do so. For example, from April 1, 2014 to March 31, 2015, the price of our stock ranged from a low of $20.29 per share to a high of $74.70 per share. Many factors could cause the market price of our common stock to rise and fall. Some of these factors are:

• variations in our quarterly results of operations;

• status of regulatory approvals for our products;

• introduction of new products by us or our competitors;

• acquisitions or strategic alliances involving us or our competitors;

• changes in healthcare policy or third-party reimbursement practices;

• changes in estimates of our performance or recommendations by securities analysts;

• the hiring or departure of key personnel;

• results of clinical trials of our products;

• future sales of shares of common stock in the public market;

• the outcome of currently pending litigation and governmental investigations; and

• market conditions in the industry, particularly around reimbursement for our products and the economy as a whole.

In addition, the stock market in general and the market for shares of medical device companies in particular have experienced extreme price and volume fluctuations in recent years. These fluctuations are often unrelated to the operating performance of particular companies. These broad market fluctuations may adversely affect the market price of our common stock. When the market price of a company’s stock drops significantly, stockholders often institute securities class action litigation against that company. Any litigation against us could cause us to incur substantial costs, divert the time and attention of our management and other resources, or otherwise harm our business.

The sale of additional shares of our common stock, or the exercise of outstanding options to purchase our common stock, would dilute our stockholders’ ownership interest.

We have issued a substantial number of options to acquire our common stock and we expect to continue to issue options to our employees and others. If all outstanding stock options were exercised, our stockholders would suffer dilution of their ownership interest. In addition, we have issued from time to time, additional shares of our common stock in connection with acquisitions, public offerings, and other activities. Future issuances of our common stock would also result in a dilution of our stockholders’ ownership interest.

The sale of material amounts of common stock could encourage short sales by third parties and depress the price of our common stock. As a result, our stockholders may lose all or part of their investment.

The downward pressure on our stock price caused by the sale of a significant number of shares of our common stock or the perception that such sales could occur by any of our significant stockholders could cause our stock price to decline, thus allowing short sellers of our stock an opportunity to take advantage of any decrease in the value of our stock. The presence of short sellers in our common stock may further depress the price of our common stock.

Our certificate of incorporation and Delaware law could make it more difficult for a third-party to acquire us and may prevent our stockholders from realizing a premium on our stock.

Provisions of our certificate of incorporation and Delaware General Corporation Law may make it more difficult for a third-party to acquire us, even if doing so would allow our stockholders to receive a premium over the prevailing market price of our stock. Those provisions of our certificate of incorporation and Delaware law are intended to encourage potential acquirers to negotiate with us and allow our Board of Directors the opportunity to consider alternative proposals in the interest of maximizing stockholder value. However, such provisions may also discourage acquisition proposals or delay or prevent a change in control which could negatively affect our stock price.

The market value of our common stock could vary significantly based on market perceptions of the status of our development efforts.

The perception of securities analysts regarding our product development efforts could significantly affect our stock price. As a result, the market price of our common stock has and could in the future change substantially when we or our competitors make product announcements. Many factors affecting our stock price are industry related and beyond our control.

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We have not paid and do not expect to pay dividends and any return on our stockholders’ investment will likely be limited to the value of our common stock.

We have never paid dividends on our common stock and do not anticipate paying dividends on our common stock in the foreseeable future. The payment of dividends on our common stock will depend on our earnings, financial condition and other business and economic factors affecting us at such time as our board of directors may consider relevant. If we do not pay dividends, our common stock may be less valuable because a return on our stockholders’ investment will only occur if our stock price appreciates.

ITEM 1B. UNRESOLVED STAFF COMMENTS

None.

ITEM 2. PROPERTIES

Our headquarters is located at 22 Cherry Hill Drive in Danvers, Massachusetts and consisted of approximately 96,000 square feet of space under an operating lease as of March 31, 2015. On April 30, 2015, we entered into an amendment to the lease in which we agreed to lease an additional 24,560 square feet of space. In addition, we have certain rights to terminate the lease early, subject to the payment of a specified termination fee based on the timing of the termination, as further outlined in the lease amendment. The amendment also grants us a one-time right of first offer to lease new space in the facility and a one-time first right of refusal to buy the facility, subject to certain conditions set forth therein. This facility encompasses most of our U.S. operations, including research and development, manufacturing, sales and marketing and general and administrative departments. The monthly lease payments over the term of the lease are as follows:

• The base rent for May 2014 through December 2015 is $74,050 per month; and

• The base rent for January 2016 through February 2016 will be $85,818 per month; and

• The base rent for March 2016 through February 2018 will be $82,518 per month; and

• The base rent for March 2018 through February 2021 will be $85,030 per month.

Our European headquarters is located in Aachen, Germany and consists of approximately 33,000 square feet of space under an operating lease. In July 2013, we entered into a lease agreement to continue renting our existing space in Aachen, Germany through July 31, 2023. The lease payments are approximately 34,500€ (euro) (approximately U.S. $37,400 at March 31, 2015 exchange rates) per month. The building houses most of the manufacturing operations for our Impella product line as well as certain research and development functions and the sales, marketing and general and administrative functions for most of our product lines sold in Europe and the Middle East.

We lease a small office in Paris, France, which focuses on the sales and marketing of our product lines sold in France. We also lease a small office in Tokyo, Japan which houses regulatory and training personnel as we prepare for commercial launch in Japan.

ITEM 3. LEGAL PROCEEDINGS

We are from time to time involved in various legal actions, the outcomes of which are not within our complete control and may not be known for prolonged periods of time. For a discussion of our material legal proceedings as of March 31, 2015, please see Note 12 to our consolidated financial statements entitled “Commitments and Contingencies,” which is incorporated by reference into this item.

ITEM 4. MINE SAFETY DISCLOSURES

Not applicable.

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PART II

ITEM 5. MARKET FOR REGISTRANT’S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES

Market Price

Our common stock is traded on the NASDAQ Global Market under the symbol “ABMD.” The following table sets forth the range of high and low sales prices per share of common stock, as reported by the NASDAQ Global Market for our two most recent fiscal years:

	High		Low
Fiscal Year Ended March 31, 2014
First Quarter	$	23.50	$	16.05
Second Quarter		25 .25		18 .15
Third Quarter		29 .24		18 .54
Fourth Quarter		30 .77		25 .26
	High		Low
Fiscal Year Ended March 31, 2015
First Quarter	$	26.57	$	20.29
Second Quarter		26 .94		24 .19
Third Quarter		39 .02		21.84
Fourth Quarter		74 .70		35 .75

Number of Stockholders

As of May 12, 2015, we had approximately 513 holders of record of our common stock and there were approximately 17,776 beneficial holders of our common stock. Many beneficial holders hold their stock through depositories, banks and brokers included as a single holder in the single “street” name of each respective depository, bank, or broker.

Dividends

We have never declared or paid any cash dividends on our common stock and do not anticipate paying any cash dividends on our common stock in the foreseeable future. We anticipate that we will retain all of our future earnings, if any, to support operations and to finance the growth and development of our business. Our payment of any future dividends will be at the discretion of our board of directors and will depend upon our financial condition, operating results, cash needs and growth plans.

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Performance Graph

The following graph compares the yearly change in the cumulative total stockholder return for our last five full fiscal years, based upon the market price of our common stock, with the cumulative total return on a NASDAQ Composite Index (U.S. Companies) and a peer group, the NASDAQ Medical Equipment-SIC Code 3840-3849 Index, which is comprised of medical equipment companies, for that period. The performance graph assumes the investment of $100 on March 31, 2010 in our Common Stock, the NASDAQ Composite Index (U.S. Companies) and the peer group index, and the reinvestment of any and all dividends.

Cumulative Total Return ($)

	3/31/2010		3/31/2011		3/31/2012		3/31/2013		3/31/2014		3/31/2015
ABIOMED, Inc		100		140.79		215.02		180.91		252.33		693.60
Nasdaq Composite Index		100		115.98		128.93		136.26		175.11		204.38
Nasdaq Medical Equipment SIC Code 3840-3849		100		108.31		115.05		105.56		123.18		118.95

This graph is not “soliciting material” under Regulation 14A or 14C of the rules promulgated under the Securities Exchange Act of 1934, is not deemed filed with the Securities and Exchange Commission and is not to be incorporated by reference in any of our filings under the Securities Act of 1933, as amended, or the Exchange Act whether made before or after the date hereof and irrespective of any general incorporation language in any such filing.

Transfer Agent

American Stock Transfer & Trust Company, 59 Maiden Lane, New York, NY 10038, is our stock Transfer Agent.

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ITEM 6. SELECTED FINANCIAL DATA

SELECTED CONSOLIDATED FINANCIAL DATA

(In thousands, except per share data)

	Fiscal Years Ended March 31,
	2015			2014		2013			2012			2011
	(in $000’s)
Statement of Operations Data:
Revenue:
Products	$	229,950		$	183,280	$	157,614		$	125,286		$	99,837
Funded research and development		361			363		510			1,089			1,314
		230,311			183,643		158,124			126,375			101,151
Costs and expenses:
Cost of product revenue		39,945			37,322		31,596			24,507			21,977
Research and development		35,973			30,707		25,647			27,159			26,677
Selling, general and administrative		125,727			107,251		84,227			71,711			62,287
Amortization of intangible assets		—			—		111			1,478			1,395
		201,645			175,280		141,581			124,855			112,336
Income (loss) from operations		28,666			8,363		16,543			1,520			(11,185	)
Other income (expense):
Investment income (expense), net		196			118		(7	)		(3	)		9
Gain on sale of WorldHeart stock		—			—		—			—			456
Gain on settlement of investment		—			—		—			1,017			—
Other (expense) income, net		(97	)		49		326			9			(143	)
		99			167		319			1,023			322
Income (loss) before income taxes		28,765			8,530		16,862			2,543			(10,863	)
Income tax (benefit) provision(1)		(84,923	)		1,179		1,848			1,048			892
Net income (loss)	$	113,688		$	7,351	$	15,014		$	1,495		$	(11,755	)
Basic net income (loss) per share	$	2.80		$	0.19	$	0.38		$	0.04		$	(0.32	)
Basic weighted average shares outstanding		40,632			39,334		39,113			38,374			37,167
Diluted net income (loss) per share	$	2.65		$	0.18	$	0.37		$	0.04		$	(0.32	)
Diluted weighted average shares outstanding		42,858			41,606		41,052			40,172			37,167
Balance Sheet Data:
Cash, cash equivalents, and short and long term marketable securities	$	145,954		$	118,340	$	88,113		$	77,223		$	60,312
Working capital		180,820			87,555		89,549			88,124			62,394
Total assets		338,367			205,407		169,999			153,911			131,588
Stockholder’s equity		291,560			168,353		137,080			126,297			104,743

The financial data included within the tables above should be read in conjunction with our consolidated financial statements and related notes and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” section of this report and our previously filed Form 10-Ks.

(1) Our net income for the year ended March 31, 2015 included an income tax benefit of $84.9 million, primarily due to the release of our valuation allowance on certain of our deferred tax assets in the quarter ended March 31, 2015.

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ITEM 7. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

All statements, trend analysis and other information contained in the following discussion relative to markets for our products and trends in revenue, gross margin and anticipated expense levels, as well as other statements, including words such as “may,” “anticipate,” “believe,” “plan,” “estimate,” “expect,” and “intend” and other similar expressions constitute forward-looking statements. These forward-looking statements are subject to business and economic risks and uncertainties and our actual results of operations may differ materially from those contained in the forward-looking statements. Factors that could cause or contribute to such differences include, but are not limited to, those discussed under Item 1A Risk Factors as well as other risks and uncertainties referenced in this report.

Overview

We are a leading provider of temporary percutaneous mechanical circulatory support devices and we offer a continuum of care to heart failure patients. We develop, manufacture and market proprietary products that are designed to enable the heart to rest, heal and recover by improving blood flow to the coronary arteries and end-organs and/or temporarily performing the pumping function of the heart. Our products are used in the cath lab by interventional cardiologists, the electrophysiology lab, the hybrid lab and in the heart surgery suite by heart surgeons. A physician may use our devices for patients who are in need of hemodynamic support before, during or after angioplasty or heart surgery procedures. We believe heart recovery is the optimal clinical outcome for patients experiencing heart failure because it enables patients to go home with their own native heart and restores their quality of life. In addition, we believe that for the care of such patients, heart recovery is the most cost-effective solution for the healthcare system.

Our strategic focus and the driver of the majority of our revenue growth is the market penetration of our Impella family of products. Our Impella 2.5 product received 510(k) clearance in June 2008 from the FDA for partial circulatory support for up to six hours. In March 2015, we received PMA from the FDA for Impella 2.5 during elective and urgent high-risk PCI procedures. Impella 2.5 is the first hemodynamic support device to receive a PMA indication for use during high-risk PCI procedures, demonstrating its safety and effectiveness for this complex patient population. With this approval, the Impella 2.5 is a temporary (up to six hours) ventricular support device indicated for use during high-risk PCI performed in elective or urgent hemodynamically stable patients with severe coronary artery disease and depressed left ventricular ejection fraction, when a heart team, including a cardiac surgeon, has determined high-risk PCI is the appropriate therapeutic option. Use of the Impella 2.5 in these patients may prevent hemodynamic instability that may occur during planned temporary coronary occlusions and may reduce peri- and post-procedural adverse events. The product labeling allows for the clinical decision to leave Impella 2.5 in place beyond the intended duration of £6 hours due to unforeseen circumstances. Per our PMA approval, we will conduct a single-arm, post approval study on the Impella 2.5, collecting data on high-risk PCI patients. The study will be a prospective, multi-center study comprised of 369 patients from 70 sites supported with the Impella 2.5 system. The Impella 2.5 heart pump is supported by clinical guidelines, has been eligible to be reimbursed in the U.S. by the Centers for Medicare & Medicaid Services, or CMS under ICD-9-CM code 37.68 since 2008 for multiple indications, including high-risk PCI.

We received 510(k) clearance in April 2009 for our Impella 5.0 and Impella LD devices for circulatory support for up to six hours. These devices are larger and provide more blood flow to patients than the Impella 2.5. In September 2012, our Impella CP product received 510(k) clearance from the FDA for partial circulatory support for up to six hours. The Impella CP and Impella 5.0 will be submitted in the future as PMA supplements and will retain their 510(k) clearances until completion of the FDA process. We received FDA approval for Impella RP under an HDE in January 2015. The Impella RP is the first percutaneous single access heart pump designed for right heart support to receive FDA approval. Our Impella 2.5, Impella 5.0, Impella LD, Impella CP and Impella RP products also have CE Mark approval and Health Canada approval which allows us to market these devices in the European Union and Canada.

The Impella product portfolio, which includes the Impella 2.5, Impella CP, Impella RP, Impella LD and Impella 5.0, has supported over 25,000 patients in the U.S.

In July 2014, we acquired all of the issued shares of ECP, a German limited liability company, for $13.0 million in cash, with additional potential payments up to a maximum of $15.0 million based on the achievement of certain technical, regulatory and commercial milestones. ECP, based in Berlin, Germany, is engaged in research, development, prototyping and the pre-serial production of a percutaneous expandable catheter pump which increases blood circulation from the heart with an external drive shaft. In connection with our acquisition of ECP, ECP acquired all of the issued shares of AIS, a German limited liability company, for $2.8 million in cash which was provided by us. AIS, based in Aachen, Germany, holds certain intellectual property useful to ECP’s business, and, prior to being acquired by ECP, had licensed such intellectual property to ECP.

Our revenues are primarily generated from our Impella line of products. Revenues from our non-Impella products, largely focused on the heart surgery suite, have been lower over the past several years as we have strategically shifted our sales and marketing efforts towards our Impella products and the cath lab. We expect that most of our product and service revenues in the near future will be from our Impella products.

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Summary of Recent Financial Performance

During fiscal 2015, we recognized net income of $113.7 million, or $2.80 per basic share and $2.65 per diluted share, compared to $7.4 million, or $0.19 per basic share and $0.18 per diluted share for the prior fiscal year. Our net income for the year ended March 31, 2015 included an income tax benefit of $84.9 million, primarily due to the release of our valuation allowance on certain of our deferred tax assets in the quarter ended March 31, 2015. We also had higher Impella product revenue due to greater utilization of our Impella products in the U.S. and Europe in fiscal 2015.

Critical Accounting Policies and Estimates

We prepare our consolidated financial statements in accordance with accounting principles generally accepted in the United States. Preparation of the consolidated financial statements requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the consolidated financial statements, as well as the reported amounts of revenue and expenses during the reporting period. Actual results could differ from these estimates. The accounting policies we believe are critical in the preparation of our consolidated financial statements relate to revenue recognition, in-process research and development, contingent consideration and income taxes. Our significant accounting policies are more fully described under the heading “Summary of Significant Accounting Policies” in Note 2 to our consolidated financial statements contained elsewhere herein.

Revenue Recognition

We recognize revenue when evidence of an arrangement exists, title has passed (generally upon shipment) or services have been rendered, the selling price is fixed or determinable and collectability is reasonably assured.

Revenue from product sales to customers is recognized when delivery has occurred. All costs related to product sales are recognized at time of delivery. We do not provide for rights of return to customers on our product sales and therefore we do not record a provision for returns.

Maintenance and service support contract revenues are included in product revenue and are recognized ratably over the term of the service contracts. Revenue is recognized as it is earned in limited instances where we rent console medical devices to customers on a month-to-month basis or for a longer specified period of time. Other service revenues are recognized as the services are performed.

In-Process Research and Development

In-process research and development, or IPR&D, assets are considered to be indefinite-lived until the completion or abandonment of the associated research and development projects. IPR&D assets represent the fair value assigned to technologies that we acquire, which at the time of acquisition have not reached technological feasibility and have no alternative future use. During the period that the assets are considered indefinite-lived, they are tested for impairment on an annual basis, or more frequently if we become aware of any events occurring or changes in circumstances that indicate that the fair value of the IPR&D assets are less than their carrying amounts. If and when development is complete, which generally occurs when we have regulatory approval and are able to commercialize products associated with the IPR&D assets, these assets are then deemed definite-lived and are amortized based on their estimated useful lives at that point in time. If development is terminated or abandoned, we may have a full or partial impairment charge related to the IPR&D assets, calculated as the excess of carrying value of the IPR&D assets over fair value.

Contingent Consideration

Contingent consideration is recorded as a liability and measured at fair value using a discounted cash flow model utilizing significant unobservable inputs including the probability of achieving each of the potential milestones and an estimated discount rate associated with the risks of the expected cash flows attributable to the various milestones. Significant increases or decreases in any of the probabilities of success or changes in expected timelines for achievement of any of these milestones would result in a significantly higher or lower fair value of these milestones, respectively, and commensurate changes to the associated liability. The fair value of the contingent consideration at each reporting date will be updated by reflecting the changes in fair value reflected in our statement of operations. Increases or decreases in the fair value of the contingent consideration obligations can result from changes in the estimates of earn out results. We have a liability of $6.5 million of contingent consideration related to $15.0 million in potential payments as of March 31, 2015, related to the ECP acquisition.

Income Taxes

Our provision for income taxes is composed of a current and a deferred portion. The current income tax provision is calculated as the estimated taxes payable or refundable on tax returns for the current year. The deferred income tax provision is calculated for the estimated future tax effects attributable to temporary differences and net operating loss carryforwards using expected tax rates in effect in the years during which the differences are expected to reverse.

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We regularly assess our ability to realize our deferred tax assets. Assessing the realization of deferred tax assets requires significant management judgment. We consider whether a valuation allowance is needed on our deferred tax assets by evaluating all positive and negative evidence relative to our ability to recover deferred tax assets. Prior to March 31, 2015, we had determined that the objectively verifiable negative evidence outweighed the positive evidence due to our history of net operating losses incurred for most of our existence, the then-pending status of our PMA application with the FDA for our Impella 2.5 product, the uncertainties relative to the DOJ investigations, among other factors, and as a result we recorded a full valuation allowance against our deferred tax assets. During the quarter ended March 31, 2015, we determined based on our consideration of the weight of positive and negative evidence that there was sufficient positive evidence that most of our federal, state and certain foreign deferred tax assets are more likely than not recoverable as of March 31, 2015. Our conclusion was primarily driven by the receipt of PMA approval for our Impella 2.5 product in March 2015, the $28.8 million of income before taxes in fiscal 2015, our history of profits in recent years and our expectation of sustainable future profitability now that we have obtained PMA approval for Impella 2.5. Accordingly, we recorded a $101.5 million reversal of the valuation allowance during the quarter ended March 31, 2015, primarily related to the Company expecting to be able to use NOL carryforwards in the future in the U.S. and Germany.

As of March 31, 2015, the remaining $2.9 million valuation allowance represents deferred tax assets related to NOL carryforwards in certain foreign jurisdictions. Based on the review of all available evidence, we recorded a valuation allowance to reduce these deferred tax assets to the amount that is more likely than not to be realizable as of March 31, 2015.

Recent Accounting Pronouncements

Information regarding recent accounting pronouncements is included in Note 2. “Summary of Significant Accounting Policies” to our consolidated financial statements in this Report.

Results of Operations

	Year Ended March 31,
	2015			2014			2013
Revenues:
Product		99.8	%		99.8	%		99.7	%
Funded research and development		0.2			0.2			0.3
Total revenues		100.0			100.0			100.0
Costs and expenses:
Cost of product revenue		17.3			20.3			20.0
Research and development		15.6			16.7			16.2
Selling, general and administrative		54.6			58.4			53.3
Total costs and expenses		87.5			95.4			89.5
Income from operations		12.5			4.6			10.5
Income before income taxes		12.5			4.6			10.7
Income tax (benefit) provision		(36.9	)		0.6			1.2
Net income		49.4	%		4.0	%		9.5	%

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The following table sets forth certain consolidated statements of operations data for the periods indicated as a percentage of total revenues:

Fiscal Years Ended March 31, 2015 and March 31, 2014 (“fiscal 2015” and “fiscal 2014”)

Revenue

Our revenues are comprised of the following:

	Year Ended March 31,
	2015		2014
	(in $000’s)
Impella product revenue	$	212,665	$	166,971
Service and other revenue		13,768		10,944
Other products		3,517		5,365
Total product revenues		229,950		183,280
Funded research and development		361		363
Total revenues	$	230,311	$	183,643

Impella product revenue encompasses Impella 2.5, Impella CP, Impella 5.0, Impella LD and Impella RP product sales. Other product revenue includes AB5000, BVS5000 and product accessory revenue. Service and other revenue represents revenue earned on service maintenance contracts and preventive maintenance calls.

Total revenues for fiscal 2015 increased by $46.7 million, or 25%, to $230.3 million from $183.6 million for fiscal 2014. The increase in total revenue was primarily due to higher Impella revenue due mainly to greater utilization of our products in the U.S.

Impella product revenues for fiscal 2015 increased by $45.7 million, or 27%, to $212.7 million from $167.0 million for fiscal 2014. Most of our increase in Impella revenue was from disposable catheter sales in the U.S., as we focus on increasing utilization of our disposable catheter products through continued investment in our field organization and physician training programs. Impella product revenues outside the US increased by $6.2 million, or 41%, during fiscal 2015. Most of this increase was due to Impella product sales in Europe, primarily Germany, as we continue to expand our commercial infrastructure there. We expect Impella revenues to continue to increase with our recent PMA approval in the U.S. and as we add new customer sites, increase utilization at existing customer sites, continue our commercial launch of Impella CP, begin our introduction of Impella RP to the market and expand our efforts in Europe.

Service and other revenue for fiscal 2015 increased by $2.9 million, or 27%, to $13.8 million from $10.9 million for fiscal 2014. The increase in service revenue was primarily due to an increase in preventative maintenance service contracts, as we expand the use of our Impella AIC consoles to additional sites.

Other product revenues for fiscal 2015 decreased by $1.9 million, or 35%, to $3.5 million from $5.4 million for fiscal 2014. The decrease in other revenue was due to a decline in AB5000 disposable sales. We also had no sales of BVS 5000 in fiscal 2015 and we are no longer actively producing that product. We also expect that AB5000 revenue will continue to decline in fiscal 2016 as we focus our sales efforts in the surgical suite on Impella 5.0 and LD.

Costs and Expenses

Cost of Product Revenue

Cost of product revenue for fiscal 2015 increased by $2.6 million, or 7%, to $39.9 million from $37.3 million for fiscal 2014. Gross margin was 83% for fiscal 2015 and 80% for fiscal 2014. The increase in cost of product revenues was related to increased Impella demand and higher production volume and costs to support growing demand for our Impella products. Gross margin was impacted favorably by higher manufacturing production volume, fewer shipments of AIC consoles, improved efficiencies in manufacturing production and a favorable Euro in the second half of fiscal 2015.

Research and Development Expenses

Research and development expenses for fiscal 2015 increased by $5.3 million, or 17%, to $36.0 million from $30.7 million in fiscal 2014. The increase in research and development expenses was primarily due to operating expenses associated with the ECP business in Berlin

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that we acquired in July 2014 and a $1.5 million up-front license payment made to Opsens, Inc. in April 2014 for optical sensor technology. We expect research and development expenses to increase in fiscal 2016 as we continue to pursue our PMA supplements for Impella CP, Impella 5.0 and Impella LD products in the U.S., incur clinical spending related to our U.S. Impella registry, and apply for regulatory approval for our Impella products in Japan. In addition, we expect to incur additional costs as we continue to focus on product development initiatives associated with existing products and new technologies.

Selling, General and Administrative Expenses

Selling, general and administrative expenses for fiscal 2015 increased by $18.4 million, or 17%, to $125.7 million from $107.3 million in fiscal 2014. The increase in selling, general and administrative expenses was primarily due to the hiring of additional U.S. field sales and clinical personnel, increased spending on marketing initiatives as we continue to educate physicians on the benefits of hemodynamic support, higher stock-based compensation expense, higher excise taxes associated with the medical device tax in the U.S. and legal and professional expenses related to the ECP acquisition. These amounts were partially offset by lower legal expenses related to the DOJ Investigations and shareholder suit discussed in “Note 12. Commitments and Contingencies—Litigation,” in the notes to consolidated financial statements.

We expect to continue to increase our expenditures on sales and marketing activities, with particular investments in field sales and clinical personnel with cath lab expertise to drive recovery awareness for acute heart failure patients. We also plan to increase our marketing, service and training investments after PMA approval in the U.S. for Impella 2.5. For the foreseeable future, we also expect to continue to incur significant legal expenses related to the DOJ Investigations, each discussed in “Note 12. Commitments and Contingencies—Litigation” in the notes to consolidated financial statements.

Income Tax Provision

We recorded an income tax benefit of $84.9 million in fiscal 2015 compared to an income tax expense of $1.2 million in fiscal 2014. The income tax benefit in fiscal 2015 was comprised of an $87.1 million deferred tax benefit primarily due to the release of our valuation allowance on certain of our deferred tax assets in the quarter ended March 31, 2015, partially offset by a current income tax provision of $2.2 million in U.S and Germany. The income tax provision for fiscal 2014 was comprised of income taxes in Germany and income taxes related to the deferred tax liability associated with tax deductible goodwill.

Net Income

During fiscal 2015, we recognized net income of $113.7 million, or $2.80 per basic share and $2.65 per diluted share, compared to $7.4 million, or $0.19 per basic share and $0.18 per diluted share for the prior fiscal year. Our net income for the year ended March 31, 2015 included an income tax benefit of $84.9 million, primarily due to the release of our valuation allowance on certain of our deferred tax assets in the quarter ended March 31, 2015. The increase in net income in fiscal 2015 was also due to higher Impella product revenue in the U.S. and Europe.

Fiscal Years Ended March 31, 2014 and March 31, 2013 (“fiscal 2014” and “fiscal 2013”)

Revenue

Our revenues are comprised of the following:

	Year Ended March 31,
	2014		2013
	(in $000’s)
Impella product revenue	$	166,971	$	140,325
Service and other revenue		10,944		9,155
Other products		5,365		8,134
Total product revenues		183,280		157,614
Funded research and development		363		510
Total revenues	$	183,643	$	158,124

Impella product revenue encompasses Impella 2.5, Impella CP, Impella 5.0, and Impella LD product sales. Other product revenue includes AB5000, BVS5000 and product accessory sales. Service and other revenue represents revenue earned on service maintenance contracts and preventive maintenance calls.

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Total revenues for fiscal 2014 increased by $25.5 million, or 16%, to $183.6 million from $158.1 million for fiscal 2013. The increase in total revenue was primarily due to higher Impella revenue due to greater utilization in the U.S., which was primarily attributable to the introduction of Impella CP in the second half of fiscal 2013.

Impella product revenues for fiscal 2014 increased by $26.7 million, or 19%, to $167.0 million from $140.3 million for fiscal 2013. Most of our increase in Impella revenue was from disposable catheter sales in the U.S., as we focus on increasing utilization of our disposable catheter products through continued investment in our field organization and physician training programs. Also, contributing to the sales increase was the introduction of Impella CP to 389 sites in the U.S. since 510(k) clearance was obtained in fiscal 2013. Impella product revenues outside the US increased by $6.0 million, or 67%, during fiscal 2014. Most of this increase was due to Impella product sales in Europe, primarily Germany, as we expanded our commercial infrastructure there.

Service and other revenue for fiscal 2014 increased by $1.7 million, or 18%, to $10.9 million from $9.2 million for fiscal 2013. The increase in service revenue was primarily due to an increase in preventative maintenance service contracts, as we expand the use of our Impella AIC consoles to additional sites.

Other product revenues for fiscal 2014 decreased by $2.7 million, or 33%, to $5.4 million from $8.1 million for fiscal 2013. The decrease in other revenue was due to a decline in BVS 5000 and AB5000 disposable sales. We are no longer actively producing the BVS 5000 and currently only actively selling the BVS 5000 upon request. We also expect that AB5000 revenue will continue to decline in fiscal 2015 as we focus our sales efforts in the surgical suite on Impella 5.0 and LD.

Costs and Expenses

Cost of Product Revenue

Cost of product revenue for fiscal 2014 increased by $5.7 million, or 18%, to $37.3 million from $31.6 million for fiscal 2013. Gross margin for each of fiscal 2014 and fiscal 2013 was 80%. The increase in cost of product revenues was related to increased Impella demand and higher production volume and costs to support the higher demand for Impella products. Gross margin rates remained stable in fiscal 2014 as we maintained average selling price for Impella products in the U.S., improved manufacturing yields and product cost savings from suppliers on increased volume. These improvements were offset by increased shipments of AIC consoles and higher costs for product testing and inspection.

Research and Development Expenses

Research and development expenses for fiscal 2014 increased by $5.1 million, or 20%, to $30.7 million from $25.6 million in fiscal 2013. The increase in research and development expenses was due primarily to an increase in spending associated with our PMA application for our existing Impella products, increased headcount in quality control, clinical spending related to our U.S. Impella registry and our Impella RP IDE study and product development initiatives associated with Impella RP and Impella CP.

Selling, General and Administrative Expenses

Selling, general and administrative expenses for fiscal 2014 increased by $23.1 million, or 27%, to $107.3 million from $84.2 million in fiscal 2013. The increase in selling, general and administrative expenses was primarily due to the hiring of additional U.S. field sales and clinical personnel, increased spending on marketing initiatives as we continue to educate physicians on the benefits of hemodynamic support, implementation of the medical device tax and higher legal expenses related to the Department of Justice investigation and shareholder suits as well as expanded compliance functions. During the year ended March 31, 2014, we incurred legal expenses of approximately $6.2 million in connection with complying with the subpoena received from the Department of Justice in October 2012 and defense of other legal claims. We also incurred $2.7 million of expenses in the year ended March 31, 2014 as a result of the medical device tax, which was implemented in the U.S. in January 2013.

Income Tax Provision

During fiscal 2014 and 2013, we recorded a provision for income taxes of $1.2 million and $1.8 million, respectively. The income tax provision for fiscal 2014 is comprised of $0.5 million of income taxes in Germany and $0.8 million for income taxes related to the deferred tax liability relating to tax deductible goodwill. These amounts are offset by $0.1 million reduction in federal and state income taxes due to change in estimate of alternative minimum tax in the U.S.

Net Income

During fiscal 2014, we recognized net income of $7.4 million, or $0.19 per basic share and $0.18 per diluted share compared to net income of $15.0 million, or $0.38 per basic share and $0.37 per diluted share, for the prior fiscal year. The decrease in net income in fiscal

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2014 was driven by higher operating expenses from expanding our commercial infrastructure, additional research and development costs, the implementation of the medical device tax in the U.S. in January 2013, and additional legal fees to comply with the subpoena received from the Department of Justice in October 2012 and defend ourselves from other legal claims, which were partially offset by increased Impella sales resulting from greater demand for our products, particularly the Impella CP.

Liquidity and Capital Resources

At March 31, 2015, our total cash, cash equivalents, and short and long-term marketable securities totaled $146.0 million, an increase of $27.7 million compared to $118.3 million at March 31, 2014. The increase in our cash, cash equivalents, and short and long-term marketable securities was due primarily to positive cash flows from operations in fiscal 2015 and proceeds from stock option exercises, partially offset by the ECP and AIS acquisitions discussed above in “Overview.” We paid approximately $15.7 million in net cash for the initial purchase price of these acquisitions. We also could be required to pay up to an additional $15.0 million, which may be paid, at our discretion, as cash, shares of our common stock or a combination of both, in connection with the acquisition of ECP, if certain technical, regulatory and commercial milestones are met.

Following is a summary of our cash flow activities:

	Years Ended March 31,
	2015			2014			2013
Net cash provided by operating activities	$	43,279		$	23,466		$	26,399
Net cash used for investing activities		(49,863	)		(22,272	)		(10,265	)
Net cash provided by (used for) financing activities		9,534			9,632			(11,811	)
Effect of exchange rate changes on cash		(1,465	)		639			(862	)
Net increase in cash and cash equivalents	$	1,485		$	11,465		$	3,461

Cash Provided by Operating Activities

For the year ended March 31, 2015, cash provided by operating activities consisted of net income of $113.7 million, less non-cash items of $65.7 million and cash used for working capital of $4.7 million. The increase in net income in fiscal 2015 included a deferred income tax benefit of $87.1 million primarily due to the release of our valuation allowance on certain of our deferred tax assets and higher Impella product revenue due to greater utilization in the U.S. and Europe. Other non-cash items primarily consisted of $16.5 million of stock-based compensation expense, $2.8 million of depreciation and amortization of long-lived assets, $2.2 million of write-downs of inventory and a $0.5 million change in fair value of contingent consideration. The decrease in cash from changes in working capital included an $8.0 million increase in accounts receivable from higher revenues, a $7.0 million increase in inventory to support growing demand for our Impella products, and a $1.5 million increase in prepaid expenses. These amounts were partially offset by $9.4 million increase in accounts payable and accrued expenses due to increase in operating expenses as discussed above in “Costs and Expenses” and an increase in deferred revenue of $2.3 million primarily due to an increase in preventative maintenance service contracts as we expand the use of our Impella AIC consoles to additional sites.

For the year ended March 31, 2014, cash provided by operating activities consisted of net income of $7.4 million, adjustments for non-cash items of $16.6 million and cash used for working capital of $0.5 million. Adjustments for non-cash items primarily consisted of $11.2 million of stock-based compensation expense, $2.5 million of depreciation and amortization of long-lived assets, $2.0 million of write-downs of inventory and a $0.9 million change in deferred tax provision. The decrease in cash from changes in working capital was primarily due to a $2.4 million increase in accounts receivable and prepaid expenses, partially offset by a $1.9 million decrease in accounts payable and accrued expenses mostly related to timing of vendor payments.

For the year ended March 31, 2013, cash provided by operating activities consisted of net income of $15.0 million, adjustments for non-cash items of $14.2 million and cash used in working capital of $2.8 million. Adjustments for non-cash items primarily consisted of $9.5 million of stock-based compensation expense, $2.7 million of depreciation and amortization of long-lived assets, $1.2 million of write-downs of inventory and a $0.8 million change in deferred tax provision. The decrease in cash from changes in working capital was primarily due to a $2.9 million increase in accounts receivable and prepaid expenses, a $5.3 million increase in inventory and a $1.2 million increase in deferred revenue, partially offset by a $4.2 million decrease in accounts payable and accrued expenses mostly related to timing of vendor payments.

Cash Used in Investing Activities

For the year ended March 31, 2015, net cash used for investing activities included $26.1 million for the purchase (net of maturities) of marketable securities, $15.7 million for our acquisition of ECP and AIS, $5.2 million for the purchase of property and equipment mostly related to expansion of manufacturing capacity in Danvers, Massachusetts and Aachen, Germany and $2.9 million of investments in private medical technology companies.

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For the year ended March 31, 2014, net cash used for investing activities included $18.8 million for the purchase (net of maturities) of marketable securities, $2.8 million for the purchase of property and equipment mostly related to leasehold improvements in Danvers, Massachusetts and Aachen, Germany and $0.8 million of investments in private medical technology companies.

For the year ended March 31, 2013, net cash used for investing activities included $7.4 million for the purchase (net of maturities) of marketable securities and $2.8 million for the purchase of property and equipment mostly related to leasehold improvements in Danvers, Massachusetts and Aachen, Germany.

Capital expenditures for fiscal 2016 are estimated to range from $15.0 to $20.0 million, and are expected to be for manufacturing capacity expansions in both our Danvers, Massachusetts and Aachen, Germany facilities, leasehold improvements and software development projects.

Cash Provided by Financing Activities

For the year ended March 31, 2015, net cash provided by financing activities included $10.9 million in proceeds from the exercise of stock options, $0.8 million in proceeds from the issuance of stock under the employee stock purchase plan and $0.6 million in excess tax benefits on stock-based awards. These amounts were partially offset by $2.8 million in payments in lieu of issuance of common stock for payroll withholding taxes upon vesting of certain equity awards.

For the year ended March 31, 2014, net cash provided by financing activities included $9.4 million in proceeds from the exercise of stock options and $0.7 million in proceeds from the issuance of stock under the employee stock purchase plan. These amounts were partially offset by $0.4 million in payments in lieu of issuance of common stock for payroll withholding taxes upon vesting of certain equity awards.

For the year ended March 31, 2013, net cash used for financing activities included $15.0 million in cash used for the repurchase of common stock under our share repurchase program and $0.3 million in payments in lieu of issuance of common stock for payroll withholding taxes upon vesting of certain equity awards. These amounts were partially offset by $2.9 million in proceeds from the exercise of stock options and $0.6 million in proceeds from the issuance of stock under the employee stock purchase plan.

Operating Capital and Liquidity Requirements

We believe that our revenue from product sales together with existing resources will be sufficient to fund our operations for at least the next twelve months, exclusive of activities involving any future acquisitions of products or companies that complement or augment our existing line of products.

Our primary liquidity requirements are to fund the expansion of our commercial infrastructure in the U.S., increase our Impella manufacturing capacity, expand our office space in Danvers, Massachusetts and Aachen, Germany, increase our inventory levels in order to meet increasing customer demand for our Impella products, fund new product development, prepare for commercial launches of Impella in new markets in the future, such as Japan, costs of legal fees related to the DOJ Investigations and to provide for general working capital needs. Through March 31, 2015, we have funded our operations principally from product sales and through the sale of equity securities.

Our liquidity is influenced by our ability to sell our products in a competitive industry and our customers’ ability to pay for our products. Factors that may affect liquidity include our ability to penetrate the market for our products, maintain or reduce the length of the selling cycle for our products, capital expenditure requirements, invest in collaborative arrangements with other partners, and collect cash from customers after our products are sold. We also expect to continue to incur legal expenses for the foreseeable future related to the DOJ Investigations and our response to requests for information. We continue to review our long-term cash needs on a regular basis. At March 31, 2015, we had no long-term debt outstanding.

Marketable securities at March 31, 2015 consisted of $123.6 million held in funds that invest in U.S. Treasury and government-backed securities. We are not a party to any interest rate swaps, currency hedges or derivative contracts of any type and have no exposure to commercial paper or auction rate securities markets.

Cash and cash equivalents held by our foreign subsidiaries totaled $3.6 million and $3.3 million at March 31, 2015 and March 31, 2014, respectively. Our operating income outside the U.S. is deemed to be permanently reinvested in foreign jurisdictions. We do not intend or currently foresee a need to repatriate cash and cash equivalents held by our foreign subsidiaries. If these funds are needed in the U.S., we believe that the potential U.S. tax impact to repatriate these funds would be immaterial.

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Contractual Obligations and Commercial Commitments

The following table summarizes our contractual obligations at March 31, 2015 and the effects such obligations are expected to have on our liquidity and cash flows in future periods.

	Payments Due By Fiscal Year (in $000’s)
	Total		Less than 1 Year		1-3 Years		3-5 Years		More than 5 Years
Contractual Obligations
Operating lease commitments	$	9,698	$	1,511	$	3,038	$	3,040	$	2,109
Contractual obligations(1)		225		75		150		—		—
Total obligations	$	9,923	$	1,586	$	3,188	$	3,040	$	2,109

(1) Contractual obligations represent future cash commitments and expected liabilities under agreements with third parties, primarily for research and development activities, such as clinical trials and material purchases for new product testing.

On July 1, 2014, we acquired ECP for $13.0 million in cash, with additional potential payouts totaling $15.0 million based on the achievement of certain technical, regulatory and commercial milestones. These milestone payments may be made, at our option, by a combination of cash or our common stock. The above table does not reflect these milestone payments, which may be payable over the next 20 years as the timing and amount of the milestone payments are indeterminate at this time. The maximum amount of the aggregate milestone payments could be $15.0 million. As of March 31, 2015, the fair value of the contingent payments was approximately $6.5 million and is reflected on our consolidated balance sheet.

We had no long-term debt, capital leases or other material commitments at March 31, 2015 other than those shown in the table above.

Our headquarters is located at 22 Cherry Hill Drive in Danvers, Massachusetts and consisted of approximately 96,000 square feet of space under an operating lease as of March 31, 2015. On April 30, 2015, we entered into an amendment to the lease in which we agreed to lease an additional 24,560 square feet of space. In addition, we have certain rights to terminate the lease early, subject to the payment of a specified termination fee based on the timing of the termination, as further outlined in the lease amendment. The amendment also grants us a one-time right of first offer to lease new space in the facility and a one-time first right of refusal to buy the facility, subject to certain conditions set forth therein. This facility encompasses most of our U.S. operations, including research and development, manufacturing, sales and marketing and general and administrative departments. The monthly lease payments over the term of the lease are as follows:

• The base rent for May 2014 through December 2015 is $74,050 per month; and

• The base rent for January 2016 through February 2016 will be $85,818 per month; and

• The base rent for March 2016 through February 2018 will be $82,518 per month; and

• The base rent for March 2018 through February 2021 will be $85,030 per month.

Our European headquarters is located in Aachen, Germany and consists of approximately 33,000 square feet of space under an operating lease. In July 2013, we entered into a lease agreement to continue renting our existing space in Aachen, Germany through July 31, 2023. The lease payments are approximately 34,500€ (euro) (approximately U.S. $37,400 at March 31, 2015 exchange rates) per month. The building houses most of the manufacturing operations for our Impella product line as well as certain research and development functions and the sales, marketing and general and administrative functions for most of our product lines sold in Europe and the Middle East.

We are also party to a license agreement related to certain circulatory care device patents and know-how. Under this agreement, we would be obligated to pay up to $3.0 million in cash or stock, if certain development and regulatory milestones are achieved. The amount has not been included in the contractual obligations table above due to the uncertainty related to the successful achievement of these milestones.

In April 2014, we entered into an exclusive license agreement with Opsens, Inc. for the rights to certain optical sensor technologies in the field of cardio-circulatory assist devices. Pursuant to the terms of the license agreement, we made a $1.5 million upfront payment upon execution of the agreement and agreed to make additional payments of up to $4.5 million upon achievement of specified development milestones. The future milestone payment amounts have not been included in the contractual obligations table above due to the uncertainty related to the successful achievement of these milestones.

We apply the disclosure provisions of Guarantor’s Accounting and Disclosure Requirements for Guarantees, Including Guarantees of Indebtedness of Others, to our agreements that contain guarantee or indemnification clauses. These disclosure provisions require that guarantors disclose certain types of guarantees, even if the likelihood of requiring the guarantor’s performance is remote. The following is a description of arrangements in which we are a guarantor.

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We enter into agreements with other companies in the ordinary course of business, typically with underwriters, contractors, clinical sites and customers that include indemnification provisions. Under these provisions we generally indemnify and hold harmless the indemnified party for losses suffered or incurred by the indemnified party as a result of our activities. These indemnification provisions generally survive termination of the underlying agreement. The maximum potential amount of future payments we could be required to make under these indemnification provisions is unlimited. We have never incurred any material costs to defend lawsuits or settle claims related to these indemnification agreements. As a result, the estimated fair value of these agreements is minimal. Accordingly, we have no liabilities recorded for these agreements at March 31, 2015.

In our clinical study agreements, we have agreed to indemnify the participating institutions against losses incurred by them for claims related to any personal injury of subjects taking part in the study to the extent they relate to use of our devices in accordance with the clinical study agreement, the protocol for the device and our instructions. The indemnification provisions contained within our clinical study agreements do not generally include limits on the claims. We have never incurred any material costs related to the indemnification provisions contained in our clinical study agreements.

In many sales transactions, we indemnify customers against possible claims of patent infringement caused by our products. The indemnifications contained within sales contracts usually do not include limits on the claims. We have never incurred any material costs to defend lawsuits or settle patent infringement claims related to sales transactions.

ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURE ABOUT MARKET RISK

Primary Market Risk Exposures

Our cash, cash equivalents and short-term marketable securities are subject to interest rate risk and will fall in value if market interest rates increase. Marketable securities at March 31, 2015 consisted of $123.6 million held in funds that invest in U.S. Treasury and government-backed securities. If market interest rates were to increase immediately and uniformly by 10 percent from levels at March 31, 2015, we believe the decline in fair market value of our investment portfolio would be immaterial.

Currency Exchange Rates

We have foreign currency exposure to exchange rate fluctuations and particularly with respect to the euro, British pound sterling and Japanese yen. Therefore, our investment in our subsidiaries is sensitive to fluctuations in currency exchange rates. The effect of a change in currency exchange rates on our net investment in international subsidiaries is reflected in the accumulated other comprehensive income component of stockholders’ equity. If rates of exchange for the euro, British pound and Japanese yen were to have depreciated immediately and uniformly by 10% relative to the U.S. dollar from levels at March 31, 2015, the result would have been a reduction of stockholders’ equity of approximately $4.2 million.

Fair Value of Financial Instruments

Our financial instruments consist primarily of cash and cash equivalents, and short-term marketable securities, accounts receivable, accounts payable and accrued expenses. The estimated fair values of the financial instruments have been determined by us using available market information and appropriate valuation techniques. Considerable judgment is required, however, to interpret market data to develop the estimates of fair value. Accordingly, the estimates presented are not necessarily indicative of the amounts that we could realize in a current market exchange. The use of different market assumptions and/or estimation methodologies may have a material effect on the estimated fair value amounts.

ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

Our consolidated financial statements and supplementary data are provided under Part IV, Item 15 of this Form 10-K.

ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE

None.

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ITEM 9A. CONTROLS AND PROCEDURES

Evaluation of Disclosure Controls and Procedures

Our management, with the participation of our principal executive officer and principal financial officer, has evaluated the effectiveness of our disclosure controls and procedures (as defined in Rule 13a-15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”)) as of March 31, 2015. Based on this evaluation, our principal executive officer and principal financial officer concluded that, as of March 31, 2015, these disclosure controls and procedures were effective to provide reasonable assurance that material information required to be disclosed by us, including our consolidated subsidiaries, in reports that we file or submit under the Exchange Act, is recorded, processed, summarized and reported, within the time periods specified in the Commission rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed by us in the reports that we file or submit under the Act is accumulated and communicated to our management, including our principal executive officer and principal financial officer, as appropriate to allow timely decisions regarding required disclosure.

Evaluation of Changes in Internal Control over Financial Reporting

During the fourth quarter of our fiscal year ended March 31, 2015, there were no changes in our internal control over financial reporting that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Management’s Report on Internal Control over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Exchange Act Rule 13a-15(f). Under the supervision and with the participation of our management, including our principal executive officer and principal financial officer, we assessed the effectiveness of our internal control over financial reporting based on the framework in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on our assessment under the framework in Internal Control—Integrated Framework (2013), our management concluded that our internal control over financial reporting was effective as of March 31, 2015.

Important Considerations

Our internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. Our internal control over financial reporting includes those policies and procedures that: (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (ii) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (iii) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of our assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

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Deloitte & Touche LLP, an independent registered public accounting firm that audited our financial statements for the year ended March 31, 2015, included in this annual report, has issued an attestation report on the effectiveness of our internal control over financial reporting. This report is set forth below:

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and Stockholders of

ABIOMED, Inc.

Danvers, Massachusetts

We have audited the internal control over financial reporting of ABIOMED, Inc. and subsidiaries (the “Company”) as of March 31, 2015 based on criteria established in Internal Control—Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management’s Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit.

We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

A company’s internal control over financial reporting is a process designed by, or under the supervision of, the company’s principal executive and principal financial officers, or persons performing similar functions, and effected by the company’s board of directors, management, and other personnel to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of the inherent limitations of internal control over financial reporting, including the possibility of collusion or improper management override of controls, material misstatements due to error or fraud may not be prevented or detected on a timely basis. Also, projections of any evaluation of the effectiveness of the internal control over financial reporting to future periods are subject to the risk that the controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

In our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of March 31, 2015, based on the criteria established in Internal Control—Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) the consolidated financial statements and financial statement schedule as of and for the year ended March 31, 2015 of the Company and our report dated May 28, 2015 expressed an unqualified opinion on those financial statements and financial statement schedule.

/s/ DELOITTE & TOUCHE LLP

Boston, Massachusetts

May 28, 2015

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ITEM 9B. OTHER INFORMATION

Not applicable.

PART III

ITEM 10. DIRECTOR, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE

The information required by Item 10 is incorporated by reference from our definitive proxy statement which will be filed no later than 120 days after the close of the fiscal year covered by this Annual Report on Form 10-K.

Code of Ethics

We have adopted a code of ethics that applies to our principal executive officer, principal financial officer, principal accounting officer or controller and persons performing similar functions. A paper copy of our code of ethics may be obtained free of charge by writing to us care of our Compliance Officer at our principal executive office located at 22 Cherry Hill Drive, Danvers, Massachusetts 01923, or by email at IR@abiomed.com.

ITEM 11. EXECUTIVE COMPENSATION

The information required by Item 11 is incorporated by reference from our definitive proxy statement which will be filed no later than 120 days after the close of the fiscal year covered by this Annual Report on Form 10-K.

ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCK HOLDER MATTERS

The information required by Item 12 is incorporated by reference from our definitive proxy statement which will be filed no later than 120 days after the close of the fiscal year covered by this Annual Report on Form 10-K.

ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE

The information required by Item 13 is incorporated by reference from our definitive proxy statement which will be filed no later than 120 days after the close of the fiscal year covered by this Annual Report on Form 10-K.

ITEM 14. PRINCIPAL ACCOUNTANT FEES AND SERVICES

The information required by Item 14 is incorporated by reference from our definitive proxy statement which will be filed no later than 120 days after the close of the fiscal year covered by this Annual Report on Form 10-K.

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PART IV

ITEM 15. EXHIBITS, FINANCIAL STATEMENT SCHEDULES

(a) The following documents are filed as part of this report:

(1) The financial statements from our Annual Report for our fiscal year ending March 31, 2015 are attached hereto.

	Page
Report of Independent Registered Public Accounting Firm	F-2
Consolidated Balance Sheets as of March 31, 2015 and 2014	F-3
Consolidated Statements of Operations for the Fiscal Years Ended March 31, 2015, 2014 and 2013	F-4
Consolidated Statements of Comprehensive Income for the Fiscal Years Ended March  31, 2015, 2014 and 2013	F-5
Consolidated Statements of Stockholders’ Equity for the Fiscal Years Ended March 31, 2015, 2014 and 2013	F-6
Consolidated Statements of Cash Flows for the Fiscal Years Ended March 31, 2015, 2014 and 2013	F-7
Notes to Consolidated Financial Statements	F-8

(2) Consolidated financial statement schedule

Schedule II: Valuation and Qualifying Accounts

(3) Exhibits

EXHIBIT INDEX

Exhibit No.	Description	Filed with this Form 10-K	Incorporated by Reference
			Form	Filing Date	Exhibit No.
2.1	Share Purchase Agreement for the acquisition of Impella Cardio Systems AG, dated April 26, 2005.		8-K (File No. 001-09585)	May 16, 2005	2.1
2.2	Agreement on the Sale and Transfer of all shares in ECP Entwicklungsgellschaft mbH		8-K (File No. 001-09585)	July 7, 2014	2.1
2.3	Agreement on the Sale and Transfer of all shares in AIS GmbH Aachen Innovative Solutions		8-K (File No. 001-09585)	July 7, 2014	2.2
3.1	Restated Certificate of Incorporation.		S-3	September 29, 1997	3.1
3.2	Restated By-Laws, as amended.		10-K (File No. 001-09585)	May 27, 2004	3.2
3.3*	Certificate of Designations of Series A Junior Participating Preferred Stock—filed as Exhibit 3.3 to the 1997 Registration Statement.		S-3	September 29, 1997	3.3
3.4	Amendment to the Company’s Restated Certificate of Incorporation to increase the authorized shares of common stock from 25,000,000 to 100,000,000.		8-K (File No. 001-09585)	March 21, 2007	3.4
4.1	Specimen Certificate of common stock.		S-1	June 5, 1987	4.1
10.1*	Form of Indemnification Agreement for Directors and Officers.		S-1	June 5, 1987	10.13
10.2*	Amendment to 1992 Combination Stock Option Plan.		10-Q (File No. 001-09585)	October 14, 1997	10.2
10.3*	1988 Employee Stock Purchase Plan, as amended.		10-Q (File No. 001-09585)	February 8, 2005	10.11
10.4*	1989 Non-Qualified Stock Option Plan for Non-Employee Directors.		10-Q (File No. 001-09585)	October 27, 1995	10.1
10.5*	1998 Equity Incentive Plan.		10-Q/A (File No. 001-09585)	January 8, 1999	10

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Exhibit No.	Description	Filed with this Form 10-K		Incorporated by Reference
				Form	Filing Date	Exhibit No.
10.6*	2000 Stock Incentive Plan Agreement, as amended.			Sch. 14A (File No. 001-09585)	July 15, 2005	Appendix A
10.7*	Form of Abiomed, Inc. Non-Statutory Stock Option Agreement for the 2000 Stock Incentive Plan for Directors.			10-Q (File No. 001-09585)	February 9, 2006	10.16
10.8*	Form of Abiomed, Inc. Non-Statutory Stock Option Agreement for the 2000 Stock Incentive Plan for Employees or Consultants.			10-Q (File No. 001-09585)	February 9, 2006	10.17
10.9*	Fourth Amended and Restated 2008 Stock Incentive Plan.		X
10.10*	Form of Non-Statutory Stock Option Agreement for Employees and Consultants under 2008 Stock Incentive Plan.			8-K (File No. 001-09585)	August 18, 2008	10.1
10.11*	Form of Non-Statutory Stock Option Agreement for Non-Employee Directors under 2008 Stock Incentive Plan.			8-K (File No. 001-09585)	August 18, 2008	10.2
10.12*	Form of Restricted Stock Agreement under 2008 Stock Incentive Plan.			8-K (File No. 001-09585)	August 18, 2008	10.3
10.13*	Form of Performance Share Award (Time Based RSU) (updated 2015).		X
10.14*	Form of Performance Share Award (Performance and Time Based RSU) (updated 2015).		X
10.15*	Form of Performance Share Award (Performance and Time Based RSU) (updated 2015).		X
10.16*	Form of Performance Share Award (Performance and Time Based RSU).			10-Q	August 5, 2011	10.1
10.17*	Form of Performance Share Award (Time Based RSU).			10-Q	August 5, 2011	10.2
10.18*	Employment Agreement of Michael R. Minogue dated April 5, 2004 (including Change in Control Agreement).			10-Q (File No. 001-09585)	August 9, 2004	10.10
10.19*	Amendment to Employment Agreement with Michael R. Minogue dated December 31, 2008.			10-Q (File No. 001-09585)	February 9, 2009	10.1
10.20*	Amendment to Change in Control Agreement with Michael R. Minogue dated December 31, 2008.			10-Q (File No. 001-09585)	February 9, 2009	10.1
10.21*	Inducement stock option granted to Michael R. Minogue dated April 5, 2004.			10-Q (File No. 001-09585)	August 9, 2004	10.11
10.22*	Restricted Stock Agreement between Abiomed, Inc. and Michael R. Minogue.			10-Q (File No. 001-09585)	October 9, 2005	10.15
10.23*	Offer Letter with Robert L. Bowen dated December 15, 2008.			8-K (File No. 001-09585)	December 22, 2008	99.2
10.24*	Offer letter with David Weber dated April 23, 2007			10-Q (File No. 001-09585)	August 9, 2007	10.1
10.25*	Summary of Executive Compensation.		X
10.26*	Form of Employment, Nondisclosure and Non Competition Agreement.			10-K (File No. 001-09585)	June 14, 2006	10.20
10.27	Lease agreement dated July 29, 2013 for the facility located in Aachen, Germany.			10-Q	November 8, 2013	10.1
10.28	Amended and Restated Lease dated as of February 24, 2014 between Abiomed, Inc. and Leo C. Thibeault, Jr., Trustee of The Thibeault Nominee Trust.			10-K (File No. 001-09585)	May 28, 2014	10.27
10.29	Amended Lease dated as of April 30, 2015 between Abiomed, Inc. and Leo C. Thibeault, Jr., Trustee of The Thibeault Nominee Trust.		X
10.30*	Form of Change of Control Agreement.			8-K (File No. 001-09585)	August 18, 2008	10.4
11.1	Statement regarding computation of Per Share Earnings (see Note 2, Notes to Consolidated Financial Statements).		X

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Exhibit No.	Description	Filed with this Form 10-K		Incorporated by Reference
				Form	Filing Date	Exhibit No.
21.1	Subsidiaries of the Registrant.		X
23.1	Consent of Deloitte & Touche LLP, independent registered public accounting firm.		X
31.1	Rule 13a—14(a)/15d—14(a) certification of principal executive officer.		X
31.2	Rule 13a—14(a)/15d—14(a) certification of principal accounting officer.		X
32.1	Section 1350 certification.		X
101	The following financial information from the ABIOMED, Inc. Annual Report on Form 10-K for the fiscal year ended March 31, 2015, formatted in Extensible Business Reporting Language (XBRL): (i) Consolidated Balance Sheets as of March 31, 2015 and 2014; (ii) Consolidated Statements of Operations for the fiscal years ended March 31, 2015, 2014 and 2013; (iii) Consolidated Statements of Comprehensive Income for the fiscal years ended March 31, 2015, 2014 and 2013; (iv) Consolidated Statements of Stockholders’ Equity for the fiscal years ended March 2015, 2014 and 2013; (v) Consolidated Statements of Cash Flows for the fiscal years ended March 31, 2015, 2014 and 2013; and (vi) Notes to Consolidated Financial Statements.		X

* Management contract or compensatory plan.

46

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	ABIOMED, Inc.
Dated: May 28, 2015	By	/s/    ROBERT L. BOWEN
		Robert L. Bowen
		Vice President, Chief Financial Officer
		(Principal Financial Officer and Principal Accounting Officer)

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

SIGNATURE	TITLE	DATE
/S/    MICHAEL R. MINOGUE       Michael R. Minogue	President, Chief Executive Officer, President and Chairman (Principal Executive Officer)	May 28, 2015
/S/    ROBERT L. BOWEN       Robert L. Bowen	Vice President, Chief Financial Officer (Principal Financial Officer and Principal Accounting Officer)	May 28, 2015
/S/    W. GERALD AUSTEN       W. Gerald Austen	Director	May 28, 2015
/S/    LOUIS E. LATAIF       Louis E. Lataif	Director	May 28, 2015
/S/    DOROTHY E. PUHY       Dorothy E. Puhy	Director	May 28, 2015
/S/    ERIC ROSE       Eric Rose	Director	May 28, 2015
/S/    MARTIN P. SUTTER       Martin P. Sutter	Director	May 28, 2015
/S/    HENRI A. TERMEER       Henri A. Termeer	Director	May 28, 2015
/S/    PAUL THOMAS       Paul Thomas	Director	May 28, 2015

47

ABIOMED, INC.

Consolidated Financial Statements

Index

	Page
Report of Independent Registered Public Accounting Firm	F-2
Consolidated Balance Sheets as of March 31, 2015 and 2014	F-3
Consolidated Statements of Operations for the Fiscal Years Ended March 31, 2015, 2014 and 2013	F-4
Consolidated Statements of Comprehensive Income for the Fiscal Years Ended March  31, 2015, 2014 and 2013	F-5
Consolidated Statements of Stockholders’ Equity for the Fiscal Years Ended March 31, 2015, 2014 and 2013	F-6
Consolidated Statements of Cash Flows for the Fiscal Years Ended March 31, 2015, 2014 and 2013	F-7
Notes to Consolidated Financial Statements	F-8

F-1

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and Stockholders of

ABIOMED, Inc.

Danvers, Massachusetts

We have audited the accompanying consolidated balance sheets of ABIOMED, Inc. and subsidiaries (the “Company”) as of March 31, 2015 and 2014, and the related consolidated statements of operations, comprehensive income, stockholders’ equity, and cash flows for each of the three years in the period ended March 31, 2015. Our audits also included the financial statement schedule listed in the Index at Item 15. These financial statements and financial statement schedule are the responsibility of the Company’s management. Our responsibility is to express an opinion on the financial statements and financial statement schedule based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, such consolidated financial statements present fairly, in all material respects, the financial position of ABIOMED, Inc. and subsidiaries as of March 31, 2015 and 2014, and the results of their operations and their cash flows for each of the three years in the period ended March 31, 2015, in conformity with accounting principles generally accepted in the United States of America. Also, in our opinion, such financial statement schedule, when considered in relation to the basic consolidated financial statements taken as a whole, presents fairly, in all material respects, the information set forth therein.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the Company’s internal control over financial reporting as of March 31, 2015, based on the criteria established in Internal Control—Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated May 28, 2015 expressed an unqualified opinion on the Company’s internal control over financial reporting.

/s/ DELOITTE & TOUCHE LLP

Boston, Massachusetts

May 28, 2015

F-2

ABIOMED, INC. AND SUBSIDIARIES

Consolidated Balance Sheets

(in thousands, except share data)

	March 31, 2015			March 31, 2014
ASSETS
Current assets:
Cash and cash equivalents	$	22,401		$	20,916
Short-term marketable securities		109,557			55,663
Accounts receivable, net		31,828			24,357
Inventories		16,774			13,948
Prepaid expenses and other current assets		4,479			3,082
Deferred tax assets, net		35,100			—
Total current assets		220,139			117,966
Long-term marketable securities		13,996			41,761
Property and equipment, net		9,127			6,889
Goodwill		31,534			37,990
In-process research and development		14,711			—
Long-term deferred tax assets, net		45,206			—
Other assets		3,654			801
Total assets	$	338,367		$	205,407
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable	$	10,389		$	7,746
Accrued expenses		21,894			17,899
Deferred revenue		7,036			4,766
Total current liabilities		39,319			30,411
Other long-term liabilities		183			228
Contingent consideration		6,510			—
Long-term deferred tax liabilities		795			6,415
Total liabilities		46,807			37,054
Commitments and contingencies (Note 12)
Stockholders’ equity:
Class B Preferred Stock, $.01 par value		—			—
Authorized—1,000,000 shares; Issued and outstanding—none
Common stock, $.01 par value		413			411
Authorized—100,000,000 shares; Issued—42,618,717 shares at March 31, 2015 and 41,122,695 shares at March 31, 2014;
Outstanding—41,335,773 shares at March 31, 2015 and 39,916,328 shares at March 31, 2014
Additional paid in capital		465,046			436,136
Accumulated deficit		(137,222	)		(250,910	)
Treasury stock at cost—1,282,944 shares at March 31, 2015 and 1,206,367 shares at March 31, 2014		(19,347	)		(16,554	)
Accumulated other comprehensive loss		(17,330	)		(730	)
Total stockholders’ equity		291,560			168,353
Total liabilities and stockholders’ equity	$	338,367		$	205,407

The accompanying notes are an integral part of the consolidated financial statements.

F-3

ABIOMED, INC. AND SUBSIDIARIES

Consolidated Statements of Operations

(in thousands, except per share data)

	Fiscal Years Ended March 31,
	2015			2014		2013
Revenue:
Product revenue	$	229,950		$	183,280	$	157,614
Funded research and development		361			363		510
		230,311			183,643		158,124
Costs and expenses:
Cost of product revenue		39,945			37,322		31,596
Research and development		35,973			30,707		25,647
Selling, general and administrative		125,727			107,251		84,227
Amortization of intangible assets		—			—		111
		201,645			175,280		141,581
Income from operations		28,666			8,363		16,543
Other income:
Investment income (expense), net		196			118		(7	)
Other (expense) income, net		(97	)		49		326
		99			167		319
Income before income taxes		28,765			8,530		16,862
Income tax (benefit) provision		(84,923	)		1,179		1,848
Net income	$	113,688		$	7,351	$	15,014
Basic net income per share	$	2.80		$	0.19	$	0.38
Basic weighted average shares outstanding		40,632			39,334		39,113
Diluted net income per share	$	2.65		$	0.18	$	0.37
Diluted weighted average shares outstanding		42,858			41,606		41,052

The accompanying notes are an integral part of the consolidated financial statements.

F-4

ABIOMED, INC. AND SUBSIDIARIES

Consolidated Statements of Comprehensive Income

(in thousands)

	Fiscal Years Ended March 31,
	2015			2014			2013
Net income	$	113,688		$	7,351		$	15,014
Other comprehensive (loss) income:
Foreign currency translation (losses) gains		(16,613	)		3,025			(1,974	)
Net unrealized gains (losses) on marketable securities		13			(18	)		2
Other comprehensive (loss) income		(16,600	)		3,007			(1,972	)
Comprehensive income	$	97,088		$	10,358		$	13,042

The accompanying notes are an integral part of the consolidated financial statements.

F-5

ABIOMED, INC. AND SUBSIDIARIES

Consolidated Statements of Stockholders’ Equity

(dollars in thousands)

	Common Stock						Treasury Stock					Additional Paid in Capital			Accumulated Deficit			Accumulated Other Comprehensive (Loss) Income			Total Stockholders’ Equity
	Number of shares			Par value			Number of shares		Amount
Balance, April 1, 2012		39,272,754		$	393			50,954	$	(827	)	$	401,771		$	(273,275	)	$	(1,765	)	$	126,297
Restricted stock issued		91,503			1			—		—			(1	)		—			—			—
Stock options exercised		337,212			3			—		—			2,933			—			—			2,936
Stock issued under employee stock purchase plan		33,132			—			—		—			555			—			—			555
Stock issued to directors		2,828			—			—		—			51			—			—			51
Repurchase of common stock		(1,123,587	)		—			1,123,587		(15,045	)		—			—			—			(15,045	)
Return of common stock to pay withholding taxes on restricted stock		(12,458	)		—			12,458		(257	)		—			—			—			(257	)
Stock compensation expense		—			—			—					9,501			—			—			9,501
Comprehensive loss		—			—			—		—			—			—			(1,972	)		(1,972	)
Net income		—			—			—		—			—			15,014			—			15,014
Balance, March 31, 2013		38,601,384			397			1,186,999		(16,129	)		414,810			(258,261	)		(3,737	)		137,080
Restricted stock issued		254,991			3			—		—			(3	)		—			—			—
Stock options exercised		1,029,024			11			—		—			9,349			—			—			9,360
Stock issued under employee stock purchase plan		43,779			—			—		—			697			—			—			697
Stock issued to directors		6,518			—			—		—			65			—			—			65
Return of common stock to pay withholding taxes on restricted stock		(19,368	)		—			19,368		(425	)		—			—			—			(425	)
Stock compensation expense		—			—			—		—			11,218			—			—			11,218
Other comprehensive income		—			—			—		—			—			—			3,007			3,007
Net income		—			—			—		—			—			7,351			—			7,351
Balance, March 31, 2014		39,916,328			411			1,206,367		(16,554	)		436,136			(250,910	)		(730	)		168,353
Restricted stock issued		543,420			5			—		—			(5	)		—			—			—
Stock options exercised		911,553			9			—		—			10,918			—			—			10,927
Stock issued under employee stock purchase plan		39,095			—			—		—			795			—			—			795
Stock issued to directors		1,954			—			—		—			76			—			—			76
Return of common stock to pay withholding taxes on restricted stock		(76,577	)		(12	)		76,577		(2,793	)					—			—			(2,805	)
Stock compensation expense		—			—			—		—			16,520			—			—			16,520
Excess tax benefit from stock-based awards		—			—			—		—			606			—			—			606
Other comprehensive loss		—			—			—		—			—			—			(16,600	)		(16,600	)
Net income		—			—			—		—			—			113,688			—			113,688
Balance, March 31, 2015		41,335,773		$	413			1,282,944	$	(19,347	)	$	465,046		$	(137,222	)	$	(17,330	)	$	291,560

The accompanying notes are an integral part of the consolidated financial statements.

F-6

ABIOMED, INC. AND SUBSIDIARIES

Consolidated Statements of Cash Flows

(in thousands)

	Fiscal Years Ended March 31,
	2015			2014			2013
Operating activities:
Net income	$	113,688		$	7,351		$	15,014
Adjustments required to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		2,770			2,508			2,723
Bad debt expense		(5	)		47			33
Stock-based compensation		16,520			11,218			9,501
Write-down of inventory		2,231			2,012			1,172
Excess tax benefit from stock-based awards		(606	)		—			—
Loss on disposal of fixed assets		—			—			10
Deferred tax (benefit) provision		(87,094	)		860			755
Change in fair value of contingent consideration		510			—			—
Changes in assets and liabilities:
Accounts receivable		(7,970	)		(1,312	)		(2,586	)
Inventories		(6,967	)		(622	)		(5,315	)
Prepaid expenses and other assets		(1,479	)		(1,039	)		(326	)
Accounts payable		3,372			(54	)		1,183
Accrued expenses and other long-term liabilities		6,011			1,938			3,057
Deferred revenue		2,309			559			1,178
Net cash provided by operating activities		43,290			23,466			26,399
Investing activities:
Purchases of marketable securities		(97,658	)		(87,026	)		(49,429	)
Proceeds from the sale and maturity of marketable securities		71,530			68,265			42,000
Payments for acquisitions, net of cash assumed		(15,697	)		—			—
Purchase of other investments		(2,850	)		(750	)		—
Purchases of property and equipment		(5,188	)		(2,761	)		(2,836	)
Net cash used for investing activities		(49,863	)		(22,272	)		(10,265	)
Financing activities:
Proceeds from the exercise of stock options		10,927			9,360			2,936
Excess tax benefit from stock-based awards		606
Repurchase of common stock		—			—			(15,045	)
Taxes paid related to net share settlement of vesting of stock awards		(2,805	)		(425	)		(257	)
Proceeds from the issuance of stock under employee stock purchase plan		795			697			555
Net cash provided by (used for) financing activities		9,523			9,632			(11,811	)
Effect of exchange rate changes on cash		(1,465	)		639			(862	)
Net increase in cash and cash equivalents		1,485			11,465			3,461
Cash and cash equivalents at beginning of year		20,916			9,451			5,990
Cash and cash equivalents at end of year	$	22,401		$	20,916		$	9,451
Supplemental disclosure of cash flow information:
Cash paid for income taxes	$	1,215		$	1,324		$	131
Supplemental disclosure of non-cash investing and financing activities:
Contingent consideration related to acquisition of ECP		6,000			—			—
Fixed asset expenditures incurred, not yet paid		193			60			250

The accompanying notes are an integral part of the consolidated financial statements.

F-7

ABIOMED, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

(Dollars in thousands, except per share data)

Note 1. Nature of Operations

Abiomed, Inc. (the “Company” or “Abiomed”) is a leading provider of mechanical circulatory support devices and offers a continuum of care in heart recovery to heart failure patients. The Company develops, manufactures and markets proprietary products that are designed to enable the heart to rest, heal and recover by improving blood flow and/or performing the pumping function of the heart. The Company’s products are used in the cardiac catheterization lab, or cath lab, by interventional cardiologists and in the heart surgery suite by heart surgeons for patients who are in need of hemodynamic support before, during or after angioplasty or heart surgery procedures.

Note 2. Summary of Significant Accounting Policies

The accompanying consolidated financial statements reflect the application of certain significant accounting policies described below.

Principles of Consolidation

The accompanying consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation.

Use of Estimates

The preparation of financial statements in conformity with generally accepted accounting principles of the United States of America, or GAAP, requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. The Company bases its estimates on historical experience and various other factors believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying value of assets and liabilities that are not readily apparent from other sources. On an ongoing basis, the Company evaluates its estimates, including those related to revenue recognition, collectability of receivables, realizability of inventory, goodwill, intangible and long-lived assets, accrued expenses, stock-based compensation, income taxes including deferred tax assets and liabilities, contingencies and litigation. Provisions for depreciation are based on their estimated useful lives using the straight-line method. Some of these estimates can be subjective and complex and, consequently, actual results may differ from these estimates under different assumptions or conditions.

Cash Equivalents and Marketable Securities

The Company classifies any marketable security with a maturity date of 90 days or less at the time of purchase as a cash equivalent. Cash equivalents are carried on the balance sheet at fair market value.

The Company classifies any security with a maturity date of greater than 90 days at the time of purchase as marketable securities and classifies marketable securities with a maturity date of greater than one year from the balance sheet date as long-term marketable securities. Securities that the Company has the positive intent and ability to hold to maturity are reported at amortized cost and classified as held-to-maturity securities. If the Company does not have the intent and ability to hold a security to maturity, it reports the investment as available-for-sale securities. The Company reports available-for-sale securities at fair value, and includes unrealized gains and, to the extent deemed temporary, unrealized losses in stockholders’ equity. If any adjustment to fair value reflects a decline in the value of the investment, the Company considers available evidence to evaluate whether the decline is “other than temporary” and, if so, marks the security to market through a charge to unrealized loss on short-term marketable securities in the consolidated statements of operations.

Major Customers and Concentrations of Credit Risk

The Company primarily sells its products to hospitals and distributors. No customer accounted for more than 10% of total product revenues in fiscal year 2015, 2014 or 2013. No customer had an accounts receivable balance greater than 10% of total accounts receivable at March 31, 2015 and 2014.

Credit is extended based on an evaluation of a customer’s financial condition and generally collateral is not required. To date, credit losses have not been significant and the Company maintains an allowance for doubtful accounts based on its assessment of the collectability of accounts receivable. Receivables are geographically dispersed, primarily throughout the U.S., as well as in Europe and other foreign countries where formal distributor agreements exist.

F-8

ABIOMED, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—(Continued)

Note 2. Summary of Significant Accounting Policies (Continued)

Financial instruments which potentially subject the Company to a concentration of credit risk consist of cash, cash equivalents, short and long-term marketable securities and accounts receivable. Management mitigates credit risk by limiting the investment type and maturity to securities that preserve capital, maintain liquidity and have a high credit quality.

Financial Instruments

The Company’s financial instruments are comprised of cash and cash equivalents, marketable securities, accounts receivable, accounts payable and accrued expenses, the carrying amounts of which approximate fair market value as they are highly liquid and primarily short term in nature.

Inventories

Inventories are stated at the lower of cost or market. Cost is based on the first in, first out method. The Company regularly reviews inventory quantities on hand and writes down to its net realizable value any inventory that it believes to be impaired. Management considers forecast demand in relation to the inventory on hand, competitiveness of product offerings, market conditions and product life cycles when determining excess and obsolescence and net realizable value adjustments. Once inventory is written down and a new cost basis is established, it is not written back up if demand increases.

Property and Equipment

Property and equipment is recorded at cost less accumulated depreciation. Depreciation is computed using the straight line method based on estimated useful lives of three to five years for machinery and equipment, computer software, and furniture and fixtures. Leasehold improvements are amortized using the straight-line method over the shorter of the lease term or the estimated useful lives of the related assets. Expenditures for maintenance and repairs are expensed as incurred. Upon retirement or other disposition of assets, the costs and related accumulated depreciation are eliminated from the accounts and the resulting gain or loss is reflected in operating expenses.

Property and equipment is reviewed for impairment losses whenever events or changes in circumstances indicate the carrying amount may not be recoverable. An impairment loss would be recognized based on the amount by which the carrying value of the asset or asset group exceeds its fair value. Fair value is determined primarily using the estimated future cash flows associated with the asset or asset group under review discounted at a rate commensurate with the risk involved and other valuation techniques.

Goodwill

Goodwill is recorded when consideration for an acquisition exceeds the fair value of the net tangible and intangible assets acquired. Goodwill is not amortized, instead the Company evaluates goodwill for impairment at least annually at October 31, as well as whenever events or changes in circumstances suggest that the carrying amount may not be recoverable.

Goodwill impairment assessments are performed at the reporting unit level. The goodwill test involves a two-step process. The first step is a comparison of the reporting unit’s fair value to its carrying value. If the reporting unit’s fair value exceeds its carrying value, no further procedures are required. However, if the reporting unit’s fair value is less than the carrying value, an impairment of goodwill may exist, requiring a second step to measure the amount of impairment loss. If the implied fair value of goodwill is less than the recorded goodwill, an impairment charge is recorded for the difference.

In applying the goodwill impairment test, the Company may assess qualitative factors to determine whether it is more likely than not that the fair value of the reporting unit is less than its carrying value (“Step 0”). Qualitative factors may include, but are not limited to, macroeconomic conditions, industry conditions, the competitive environment, changes in the market for our products and services, regulatory and political developments, cost factors, and entity specific factors such as strategies and overall financial performance. If, after assessing these qualitative factors, the Company determines it is not more likely than not that the fair value of a reporting unit is less than its carry amount, then performing the two-step impairment test is unnecessary.

When necessary, the goodwill impairment test is performed at the reporting unit level by comparing the reporting unit’s carrying amount, including goodwill, to the fair value of the reporting unit. The Company estimates the fair value of its single reporting unit using a

F-9

ABIOMED, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—(Continued)

Note 2. Summary of Significant Accounting Policies (Continued)

combination of the income approach and the market approach. The income approach incorporates the use of a discounted cash flow method in which the estimated future cash flows and terminal values for the reporting unit is discounted to a present value using an appropriate discount rate. Cash flow projections are based on management’s estimates of economic and market conditions which drive key assumptions of revenue growth rates, operating margins, capital expenditures and working capital requirements. The discount rate is based on the specific risk characteristics of the reporting unit and its underlying forecast. The market approach estimates fair value by comparing publicly traded companies with similar operating and investment characteristics as the reporting unit. The fair values determined by the market approach and income approach, are weighted to determine the fair value for the reporting unit based primarily on the similarity of the operating and investment characteristics of the reporting unit to the comparable publicly traded companies used in the market approach. In order to assess the reasonableness of the calculated reporting unit’s fair value, the Company also compares the reporting unit’s fair value to its market capitalization (per share stock price times number of common shares outstanding) and calculate an implied control premium (the excess of the reporting unit’s fair value over the market capitalization).

If the carrying amount of the reporting unit exceeds its fair value, then a second step is performed to measure the amount of impairment loss, if any, by comparing the fair value of each identifiable asset and liability in the reporting unit to the total fair value of the reporting unit. Any impairment loss is expensed in the consolidated statement of operations and is not reversed if the fair value subsequently increases.

In-Process Research and Development

In-process research and development, or IPR&D, assets are considered to be indefinite-lived until the completion or abandonment of the associated research and development projects. IPR&D assets represent the fair value assigned to technologies that are acquired, which at the time of acquisition have not reached technological feasibility and have no alternative future use. During the period that the IPR&D assets are considered indefinite-lived, they are tested for impairment on an annual basis, or more frequently if the Company becomes aware of any events occurring or changes in circumstances that indicate that the fair value of the IPR&D assets are less than their carrying amounts. If and when development is complete, which generally occurs upon regulatory approval and are able to commercialize products associated with the IPR&D assets, these assets are then deemed definite-lived and are amortized based on their estimated useful lives at that point in time. If development is terminated or abandoned, the Company may have a full or partial impairment charge related to the IPR&D assets, calculated as the excess of carrying value of the IPR&D assets over fair value.

Contingent Consideration

Contingent consideration is recorded as a liability and is the estimate of the fair value of potential milestone payments related to business acquisitions. Contingent consideration is measured at fair value using a discounted cash flow model utilizing significant unobservable inputs including the probability of achieving each of the potential milestones and an estimated discount rate associated with the risks of the expected cash flows attributable to the various milestones. Significant increases or decreases in any of the probabilities of success or changes in expected timelines for achievement of any of these milestones would result in a significantly higher or lower fair value of these milestones, respectively, and commensurate changes to the associated liability. The fair value of the contingent consideration at each reporting date is updated by reflecting the changes in fair value reflected within research and development expenses in our statement of operations.

Accrued Expenses

As part of the process of preparing its financial statements, the Company is required to estimate accrued expenses. This process involves identifying services that third parties have performed and estimating the level of service performed and the associated cost incurred on these services as of each balance sheet date in its financial statements. Examples of estimated accrued expenses include contract service fees, such as amounts due to clinical research organizations, investigators in conjunction with clinical trials, professional service fees, such as attorneys and accountants, and third party expenses relating to marketing efforts associated with commercialization of the Company’s product and product candidates. Accrued expenses also include estimates for payroll costs, such as bonuses and commissions. In the event that the Company does not identify certain costs that have been incurred or it under or over-estimates the level of services or the costs of such services, reported expenses for a reporting period could be overstated or understated. The date in which certain services commence, the level of services performed on or before a given date and the cost of services is often subject to the Company’s judgment. The Company makes these judgments and estimates based upon known facts and circumstances.

Revenue Recognition

The Company recognizes revenue when evidence of an arrangement exists, title has passed (generally upon shipment) or services have been rendered, the selling price is fixed or determinable and collectability is reasonably assured.

F-10

ABIOMED, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—(Continued)

Note 2. Summary of Significant Accounting Policies (Continued)

Revenue from product sales to customers is recognized when delivery has occurred. All costs related to product sales are recognized at time of delivery. The Company does not provide for rights of return to customers on product sales and therefore does not record a provision for returns.

Maintenance and service support contract revenues are included in product sales and are recognized ratably over the term of the service contracts. Revenue is recognized as earned in limited instances where the Company rents its console medical devices on a month-to-month basis or for a longer specified period of time to customers.

Government-sponsored research and development contracts and grants generally provide for payment on a cost-plus-fixed-fee basis. Revenues from these contracts and grants are recognized as work is performed, provided the government has appropriated sufficient funds for the work. Under contracts in which the Company elects to spend significantly more on the development project during the term of the contract than the total contract amount, the Company prospectively recognizes revenue on such contracts ratably over the term of the contract as related research and development costs are incurred.

Product Warranty

The Company generally provides a one-year warranty for certain products sold in which estimated contractual warranty obligations are recorded as an expense at the time of shipment and are included in accrued expenses in the accompanying consolidated balance sheets. The Company’s products are subject to regulatory and quality standards. Future warranty costs are estimated based on historical product performance rates and related costs to repair given products. The accounting estimate related to product warranty involves judgment in determining future estimated warranty costs. Should actual performance rates or repair costs differ from estimates, revisions to the estimated warranty liability would be required.

Translation of Foreign Currencies

The functional currency of the Company’s foreign subsidiaries is their local currency. The assets and liabilities of the Company’s foreign subsidiaries are translated into U.S. dollars at exchange rates in effect at the balance sheet date. Income and expense items are translated at the average exchange rates prevailing during the period. The cumulative translation effect for subsidiaries using a functional currency other than the U.S. dollar is included in accumulated other comprehensive income or loss as a separate component of stockholders’ equity.

The Company’s intercompany accounts are denominated in the functional currency of the foreign subsidiary. Gains and losses resulting from the remeasurement of intercompany receivables that the Company considers to be of a long-term investment nature are recorded as a cumulative translation adjustment in accumulated other comprehensive income or loss as a separate component of stockholders’ equity, while gains and losses resulting from the remeasurement of intercompany receivables from those foreign subsidiaries for which the Company anticipates settlement in the foreseeable future are recorded in the consolidated statement of operations. The net gains and losses recorded in the consolidated statements of operations for the years ended March 31, 2015, 2014 and 2013 were not significant.

Net Income Per Share

Basic net income per share is computed by dividing net income by the weighted average number of common shares outstanding during the fiscal year. Diluted net income per share is computed using the treasury stock method by dividing net income by the weighted average number of dilutive common shares outstanding during the fiscal year. Diluted shares outstanding is calculated by adding to the weighted average shares outstanding any potential dilutive securities outstanding for the fiscal year. Potential dilutive securities include stock options, restricted stock awards, restricted stock units, performance-based awards and shares to be purchased under the employee stock purchase plan. In fiscal years when a net loss is reported, all common stock equivalents are excluded from the calculation because they would have an anti-dilutive effect, meaning the loss per share would be reduced. Therefore, in periods when a loss is reported basic and dilutive loss per share are the same.

F-11

ABIOMED, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—(Continued)

Note 2. Summary of Significant Accounting Policies (Continued)

	March 31,
	2015		2014		2013
Basic Net Income Per Share
Net income	$	113,688	$	7,351	$	15,014
Weighted average shares used in computing basic net income per share		40,632		39,334		39,113
Net income per share—basic	$	2.80	$	0.19	$	0.38

	March 31,
	2015		2014		2013
Diluted Net Income Per Share
Net income	$	113,688	$	7,351	$	15,014
Weighted average shares used in computing basic net income per share		40,632		39,334		39,113
Effect of dilutive securities		2,226		2,272		1,939
Weighted average shares used in computing diluted net income per share		42,858		41,606		41,052
Net income per share—diluted	$	2.65	$	0.18	$	0.37

For the fiscal years ended March 31, 2015, 2014 and 2013, approximately 2,000, 94,000 and 438,000 shares of common stock underlying outstanding securities primarily related to out-of-the-money stock options and performance-based awards where milestones were not met were not included in the computation of diluted earnings per share because their inclusion would be anti-dilutive.

Stock-Based Compensation

The Company’s stock-based compensation cost is measured at the grant date based on the fair value of the award and is recognized as an expense over the requisite service period, and includes an estimate of awards that will be forfeited.

The fair value of stock option grants is estimated using the Black-Scholes option pricing model. Use of the valuation model requires management to make certain assumptions with respect to selected model inputs. The risk-free interest rate is based on the U.S. Treasury yield curve in effect at the time of grant for a term consistent with the expected life of the stock options. Volatility assumptions are calculated based on historical volatility of the Company’s stock. The Company estimates the expected term of options based on historical exercise experience and estimates of future exercises of unexercised options. In addition, an expected dividend yield of zero is used in the option valuation model because the Company does not pay dividends and does not expect to pay any cash dividends in the foreseeable future. Forfeitures are estimated based on an analysis of actual option forfeitures, adjusted to the extent historical forfeitures may not be indicative of forfeitures in the future.

For awards with service conditions only, the Company recognizes compensation cost on a straight-line basis over the requisite service period. For awards with service and performance conditions, the Company recognizes compensation costs using the graded vesting method over the requisite service period. Accruals of compensation cost for an award with performance conditions are based on the probable outcome of the performance conditions. The cumulative effect of changes in the probability outcomes are recorded in the period in which the changes occur.

Income Taxes

The Company’s provision for income taxes is comprised of a current and a deferred provision. The current income tax provision is calculated as the estimated taxes payable or refundable on tax returns for the current fiscal year. The deferred income tax provision is calculated for the estimated future income tax effects attributable to temporary differences and carryforwards using expected tax rates in effect in the years during which the differences are expected to reverse.

Deferred income taxes are recognized for the tax consequences in future years of differences between the tax bases of assets and liabilities and their financial reporting amounts at each fiscal year end based on enacted tax laws and statutory tax rates applicable to the periods in which the differences are expected to impact taxable income.

F-12

ABIOMED, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—(Continued)

Note 2. Summary of Significant Accounting Policies (Continued)

The Company regularly assesses its ability to realize its deferred tax assets. Assessing the realization of deferred tax assets requires significant management judgment. Valuation allowances are established when necessary to reduce net deferred tax assets to the amount that is more likely than not to be realized.

The Company recognizes and measures uncertain tax positions using a two-step approach. The first step is to evaluate the tax position for recognition by determining if, based on the technical merits, it is more likely than not that the position will be sustained upon audit, including resolution of related appeals or litigation processes, if any. The second step is to measure the tax benefit at the largest amount that is more than 50% likely of being realized upon ultimate settlement. The Company reevaluates these uncertain tax positions on a quarterly basis. This evaluation is based on factors including, but not limited to, changes in facts or circumstances, changes in tax laws, effectively settled issues under audit and new audit activity. Any changes in these factors could result in the recognition of a tax benefit or an additional charge to the tax provision. When applicable, the Company accrues for the effects of uncertain tax positions and the related potential penalties and interest through income tax expense. As of March 31, 2015, the Company has no material uncertain tax positions and no interest and penalties have been recognized to date.

Recent Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-09, Revenue from Contracts with Customers to provide updated guidance on revenue recognition. ASU 2014-09 requires a company to recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. In doing so, companies may need to use more judgment and make more estimates than under today’s guidance. These may include identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. This standard was initially released as effective for fiscal years beginning after December 15, 2016; however, the FASB has tentatively decided to defer the effective date of ASU 2014-09 for one year. The new guidelines can be implemented using either of the following transition methods: (i) a full retrospective approach reflecting the application of the standard in each prior reporting period with the option to elect certain practical expedients, or (ii) a retrospective approach with the cumulative effect of initially adopting ASU 2014-09 recognized at the date of adoption. The Company is currently evaluating the impact of this ASU on its consolidated financial statements and has not yet determined the method by which it will adopt the standard.

Note 3. Acquisitions

Acquisition of ECP Entwicklungsgesellschaft mbH

On July 1, 2014, the Company entered into a share purchase agreement with its wholly owned German subsidiary, Abiomed Europe GmbH (“Abiomed Europe”) and Syscore GmbH (“Syscore”), a limited liability company located in Berlin, Germany, providing for the Company’s acquisition of all of the share capital of ECP Entwicklungsgesellschaft mbH (“ECP”), a limited liability company incorporated in Germany. ECP is engaged in research, development, prototyping and the production of a percutaneous expandable catheter pump which increases blood circulation from the heart with an external drive shaft. The Company’s acquisition of ECP closed on July 1, 2014.

The Company acquired ECP for $13.0 million in cash, with additional potential payouts totaling $15.0 million payable to Syscore based on the achievement of certain technical, regulatory and commercial milestones. These milestone payments may be made, at the Company’s option, by a combination of cash or the Company’s common stock. With respect to such milestone payments, the share purchase agreement provides:

• that, upon the earlier of (i) the Company’s receipt of European CE Marking approval relating to the sale of an expandable device based on certain patent rights acquired from ECP, or (ii) the Company’s bringing of a successful claim against a third party competitor (or reaching an economically equivalent settlement) for the infringement of certain patent rights acquired from ECP, it will pay Syscore an additional $7.0 million (provided that if such claim or settlement does not prohibit the third party competitor’s further marketing, production, sale, distribution, lease or use of any violating or infringing products, but only awards monetary damages to the Company or to Abiomed Europe, the amount payable to Syscore shall be limited to the lower of the amount of aggregate damages received and $7.0 million); and

• that, upon the first to occur of (i) the Company’s successful commercialization of one or more rotatable and expandable devices based on certain patent rights acquired from ECP, where such devices achieve aggregate worldwide revenues of $125.0 million,

F-13

ABIOMED, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—(Continued)

Note 3. Acquisitions (Continued)

including the revenues of third-party licensees, or (ii) the Company’s sale of (A) ECP, (B) all or substantially all of ECP’s assets, or (C) certain of ECP’s patent rights, the Company will pay to Syscore the lesser of (x) one-half of the profits earned from such sale described in the foregoing item (ii), after accounting for the costs of acquiring and operating ECP, or (y) $15.0 million (less any previous milestone payment).

ECP’s Acquisition of AIS GmbH Aachen Innovative Solutions

In connection with the Company’s acquisition of ECP, ECP acquired all of the share capital of AIS GmbH Aachen Innovative Solutions (“AIS”), a limited liability company incorporated in Germany, pursuant to a share purchase agreement dated as of June 30, 2014, by and among ECP and AIS’s four individual shareholders. AIS, based in Aachen, Germany, holds certain intellectual property useful to ECP’s business, and, prior to being acquired by ECP, had licensed such intellectual property to ECP.

The purchase price for the acquisition of AIS’s share capital was approximately $2.8 million in cash, which was provided by the Company, and the acquisition closed immediately prior to Abiomed Europe’s acquisition of ECP. The share purchase agreement contains representations, warranties and closing conditions customary for transactions of its size and nature.

Purchase Price Allocation

The acquisition of ECP and AIS was accounted for as a business combination. The purchase price for the acquisition has been allocated to the assets acquired and liabilities assumed based on their estimated fair values.

The acquisition-date fair value of the consideration transferred is as follows:

	Total Acquisition Date Fair Value (in thousands)
Cash consideration	$	15,750
Contingent consideration		6,000
Total consideration transferred	$	21,750

F-14

ABIOMED, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—(Continued)

Note 3. Acquisitions (Continued)

The following table summarizes the estimated fair values of the assets acquired and liabilities assumed on July 1, 2014, the date of acquisition (in thousands):

Acquired assets:
Cash and cash equivalents	$	53
Accounts receivable		25
Property and equipment		619
In-process research and development		18,500
Goodwill		1,964
Long-term deferred tax assets		1,874
Other assets acquired		141
Total assets acquired		23,176
Liabilities assumed:
Accounts payable		295
Accrued liabilities		131
Long-term deferred tax liabilities		1,000
Total liabilities assumed		1,426
Net assets acquired	$	21,750

IPR&D is principally the estimated fair value of the ECP and AIS technology which had not reached commercial technological feasibility nor had alternative future use at the time of the acquisition and therefore the Company considered IPR&D, with assigned values to be allocated among the various IPR&D assets acquired.

Goodwill is calculated as the difference between the acquisition-date fair value of the consideration transferred and the fair values of the assets acquired and liabilities assumed. The goodwill resulting from these acquisitions arises largely from synergies expected from combining the operations of ECP and AIS with the Company’s existing operations. The goodwill is not deductible for income tax purposes.

All legal, consulting and other costs related to the acquisition, aggregating approximately $1.1 million, have been expensed as incurred and are included in selling, general and administrative expenses in the Company’s consolidated statements of operations. The results of operations for ECP and AIS are included in the Company’s consolidated statements of operations for the period from the July 1, 2014 acquisition date to March 31, 2015. The Company has no material revenues and incurred $2.3 million in net losses from July 1, 2014 through March 31, 2015 associated with the operations of ECP. This also includes a $0.5 million expense for the change in fair value of the contingent consideration from July 1, 2014 to March 31, 2015.

F-15

ABIOMED, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—(Continued)

Note 3. Acquisitions (Continued)

The following unaudited pro forma information presents the combined results of operations for the years ended March 31, 2015 and March 31, 2014, as if the Company had completed the ECP and AIS acquisitions at the beginning of fiscal 2014. The pro forma financial information is provided for comparative purposes only and is not necessarily indicative of what actual results would have been had the acquisition occurred on the date indicated, nor does it give effect to synergies, cost savings, fair market value adjustments, immaterial amortization expense and other changes expected to result from the acquisition. Accordingly, the pro forma financial results do not purport to be indicative of consolidated results of operations as of the date hereof, for any period ended on the date hereof, or for any other future date or period. The pro forma consolidated financial information has been calculated after applying the Company’s accounting policies and includes adjustments for transaction-related costs, to eliminate revenues earned by AIS from ECP and expenses paid by ECP to AIS associated with a license agreement between the two parties, interest expense incurred by ECP related to bank loans accounted as if the repayment of ECP debt had occurred on April 1, 2013 and was not outstanding during the periods, and income tax provision of AIS due to the elimination of revenue on the license agreement with ECP.

	Year Ended March 31,
	2015		2014
	(in $000’s)
Revenue	$	230,323	$	183,689
Income before income taxes		28,871		4,802
Net income		113,794		3,623

Note 4. Marketable Securities and Fair Value Measurements

Marketable Securities

The Company’s marketable securities are classified as available-for-sale securities and, accordingly, are recorded at fair value. The difference between amortized cost and fair value is reported as a component of other comprehensive (loss) income.

The Company’s marketable securities at March 31, 2015 and 2014 are classified on the balance sheet as follows (in thousands):

	March 31,
	2015		2014
	(in $000’s)
Short-term marketable securities (within one year to maturity)	$	109,557	$	55,663
Long-term marketable securities (one to five years to maturity)		13,996		41,761
	$	123,553	$	97,424

F-16

ABIOMED, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—(Continued)

Note 4. Marketable Securities and Fair Value Measurements (Continued)

The Company’s marketable securities at March 31, 2015 and 2014 are invested in the following (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Market Value
	(in $000’s)
At March 31, 2015:
US Treasury mutual fund securities	$	19,487	$	—	$	—		$	19,487
Short-term government-backed securities		90,070		9		(9	)		90,070
Long-term government-backed securities		13,999		2		(5	)		13,996
	$	123,556	$	11	$	(14	)	$	123,553
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Market Value
	(in $000’s)
At March 31, 2014:
US Treasury mutual fund securities	$	31,487	$	—	$	—		$	31,487
Short-term government-backed securities		24,174		6		(4	)		24,176
Long-term government-backed securities		41,779		8		(26	)		41,761
	$	97,440	$	14	$	(30	)	$	97,424

Fair Value Hierarchy

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Financial assets and liabilities carried at fair value are to be classified and disclosed in one of the following three categories:

Level 1: Quoted market prices in active markets for identical assets or liabilities.

Level 2: Observable market based inputs or unobservable inputs that are corroborated by market data.

Level 3: Unobservable inputs that are not corroborated by market data.

Level 1 primarily consists of financial instruments whose value is based on quoted market prices such as exchange-traded instruments and listed equities.

Level 2 includes financial instruments that are valued using models or other valuation methodologies. These models are primarily industry-standard models that consider various assumptions, including time value, yield curve, volatility factors, prepayment speeds, default rates, loss severity, current market and contractual prices for the underlying financial instruments, as well as other relevant economic measures. Substantially all of these assumptions are observable in the marketplace, can be derived from observable data or are supported by observable levels at which transactions are executed in the marketplace.

Level 3 is comprised of unobservable inputs that are supported by little or no market activity. Financial assets are considered Level 3 when their fair values are determined using pricing models, discounted cash flows or similar techniques and at least one significant model assumption or input is unobservable.

F-17

ABIOMED, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—(Continued)

Note 4. Marketable Securities and Fair Value Measurements (Continued)

The following table presents the Company’s fair value hierarchy for its financial instruments measured at fair value as of March 31, 2015 and 2014:

	Level 1		Level 2		Level 3		Total
	(in $000’s)
At March 31, 2015:
Assets
U.S. Treasury mutual fund securities	$	—	$	19,487	$	—	$	19,487
Short-term government-backed securities		—		90,070		—		90,070
Long-term government-backed securities		—		13,996		—		13,996
Liabilities
Contingent consideration		—		—		6,510		6,510
	Level 1		Level 2		Level 3		Total
	(in$000’s)
At March 31, 2014:
U.S. Treasury mutual fund securities	$	—	$	31,487	$	—	$	31,487
Short-term government-backed securities		—		24,176		—		24,176
Long-term government-backed securities		—		41,761		—		41,761

The Company has determined that the estimated fair value of its investments in U.S. Treasury mutual fund securities, short-term government-backed securities and long-term government-backed securities are reported as Level 2 financial assets as they are not exchange-traded instruments.

The Company’s financial liabilities consisted of contingent consideration potentially payable to former ECP shareholders related to the acquisition of ECP in July 2014. This liability is reported as Level 3 as estimated fair value of the contingent consideration related to the acquisition of the ECP requires significant management judgment or estimation and is calculated using the income approach, using various revenue and cost assumptions and applying a probability to each outcome.

The following table summarizes the change in fair value, as determined by Level 3 inputs, of the contingent consideration for the year ended March 31, 2015:

	March 31, 2015
	(in $000’s)
Beginning balance	$	—
Additions		6,000
Payments		—
Change in fair value		510
Ending balance	$	6,510

The change in fair value of the contingent consideration of $0.5 million for the year ended March 31, 2015 was primarily due to an increase in fair value due to the effect of the passage of time on the fair value measurement of milestones related to the ECP acquisition. Adjustments associated with the change in fair value of contingent consideration are included in research and development expenses on the Company’s consolidated statements of operations.

F-18

ABIOMED, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—(Continued)

Note 4. Marketable Securities and Fair Value Measurements (Continued)

The following table presents quantitative information about the inputs and valuation methodologies used for the Company’s fair value measurements as of July 1, 2014 and March 31, 2015 classified in Level 3:

	Valuation Methodology	Significant Unobservable Input	Weighted Average (range, if applicable)
Contingent consideration	Probability weighted income approach	Milestone dates	2018 to 2021
		Discount rate	8% to 12%
		Probability of occurrence	Probability adjusted level of 40% for the base case scenario and 5% to 25% for various upside and downside scenarios

Other Investments

In May 2013 and September 2014, the Company invested $0.8 million and $0.7 million in preferred stock of a private medical technology company. There are no additional outstanding funding commitments associated with this investment.

In November 2014, the Company invested $0.5 million in a 0% interest promissory note to a separate private medical technology company that is convertible into preferred stock of the company based upon a qualified financing as defined in the agreement governing the investment. The promissory note was converted into preferred stock on May 19, 2015. There are no additional outstanding funding commitments associated with this investment.

In January 2015, the Company invested $0.6 million in a 5% interest promissory note to another private medical technology company. This promissory note and accrued interest is convertible into preferred stock of the company upon a qualified financing as defined in the agreement governing the investment. The Company could also be required to invest an additional $0.4 million in the form of a promissory note if certain milestones are met.

In March 2015, the Company invested $1.0 million in preferred stock of a private medical technology company. There are no additional outstanding funding commitments associated with this investment.

The Company’s other investments are accounted for using the cost method and are measured at fair value on a nonrecurring basis only if there are identified events or changes in circumstances that may have a significant adverse effect on the fair value of these investments. The aggregate carrying amount of these investments was $3.6 million and $0.8 million at March 31, 2015 and March 31, 2014, respectively, and is classified within other assets in the consolidated balance sheets.

Note 5. Accounts Receivable

The components of accounts receivable are as follows:

	March 31,
	2015			2014
	(in $000’s)
Trade receivables	$	32,005		$	24,542
Allowance for doubtful accounts		(177	)		(185	)
	$	31,828		$	24,357

F-19

ABIOMED, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—(Continued)

Note 6. Inventories

The components of inventories are as follows:

	March 31,
	2015		2014
	(in $000’s)
Raw materials and supplies	$	7,417	$	6,414
Work-in-progress		6,466		6,261
Finished goods		2,891		1,273
	$	16,774	$	13,948

The Company’s inventories relate to its circulatory care product lines, primarily the Impella and AB5000 product platforms. Finished goods and work-in-process inventories consist of direct material, labor and overhead. During the years ended March 31, 2015, 2014 and 2013, the Company recorded $2.2 million, $2.0 million and $1.2 million, respectively, in write-downs of inventory.

Note 7. Property and Equipment

The components of property and equipment are as follows:

	March 31,
	2015			2014
	(in $000’s)
Machinery and equipment	$	19,335		$	16,805
Furniture and fixtures		1,000			960
Leasehold improvements		2,874			1,876
Construction in progress		1,685			1,226
Total cost		24,894			20,867
Less accumulated depreciation		(15,767	)		(13,978	)
	$	9,127		$	6,889

Depreciation expense related to property and equipment was $2.7 million, $2.4 million and $2.5 million for the years ending March 31, 2015, 2014 and 2013, respectively.

Note 8. Goodwill and In-Process Research and Development

The carrying amount of goodwill at March 31, 2015 and 2014 was $31.5 million and $38.0 million, respectively, and has been recorded in connection with the Company’s acquisition of Impella Cardiosystems AG, or Impella, in 2005 and ECP and AIS in July 2014. The goodwill activity is as follows:

	March 31, 2015
	(in $000’s)
Balance at March 31, 2013	$	35,410
Foreign currency translation impact		2,580
Balance at March 31, 2014	$	37,990
Additions		1,964
Foreign currency translation impact		(8,420	)
Balance at March 31, 2015	$	31,534

F-20

ABIOMED, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—(Continued)

Note 8. Goodwill and In-Process Research and Development (Continued)

The Company has no accumulated impairment losses on goodwill. The Company performed a Step 0 qualitative assessment during the annual impairment review for fiscal 2015 as of October 31, 2014 and concluded that it is not more likely than not that the fair value of the Company’s single reporting unit is less than its carrying amount. Therefore, the two-step goodwill impairment test for the reporting unit was not necessary in fiscal 2015.

As described in Note 3. “Acquisitions,” in July 2014, the Company acquired ECP and AIS and recorded $18.5 million of IPR&D. The estimated fair value of the IPR&D was determined using a probability-weighted income approach, which discounts expected future cash flows to present value. The projected cash flows from the expandable catheter pump technology were based on certain key assumptions, including estimates of future revenue and expenses, taking into account the stage of development of the technology at the acquisition date and the time and resources needed to complete development. The Company used a discount rate of 22.5% and cash flows that have been probability adjusted to reflect the risks of product commercialization, which the Company believes are appropriate and representative of market participant assumptions.

The carrying value of the Company’s IPR&D assets and the change in the balance for the year ended March 31, 2015 is as follows:

	March 31, 2015
	(in $000’s)
Beginning balance	$	—
Additions		18,500
Foreign currency translation impact		(3,789	)
Ending balance	$	14,711

Note 9. Stockholders’ Equity

Class B Preferred Stock

The Company has authorized 1,000,000 shares of Class B Preferred Stock, $.01 par value, of which the Board of Directors can set the designation, rights and privileges. No shares of Class B Preferred Stock have been issued or are outstanding.

Stock Repurchase Program

In November 2012, the Company’s Board of Directors authorized a stock repurchase program for up to $15.0 million of its common stock. The Company financed the stock repurchase program with its available cash. During the year ended March 31, 2013, the Company repurchased 1,123,587 shares for $15.0 million in open market purchases at an average cost of $13.39 per share, including commission expense. The Company completed the purchase of common stock under this stock repurchase program in January 2013.

Note 10. Stock Award Plans and Stock-Based Compensation

Stock Award Plans

The Company grants stock options and restricted stock awards to employees and others. All outstanding stock options of the Company as of March 31, 2015 were granted with an exercise price equal to the fair market value on the date of grant. Outstanding stock options, if not exercised, expire 10 years from the date of grant.

The Company’s 2008 Stock Incentive Plan (the “Plan”) authorizes the grant of a variety of equity awards to the Company’s officers, directors, employees, consultants and advisers, including awards of unrestricted and restricted stock, restricted stock units, incentive and nonqualified stock options to purchase shares of common stock, performance share awards and stock appreciation rights. The Plan provides that options may only be granted at the current market value on the date of grant. Each share of stock issued pursuant to a stock option or stock appreciation right counts as one share against the maximum number of shares issuable under the Plan, while each share of stock issued

F-21

ABIOMED, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—(Continued)

Note 10. Stock Award Plans and Stock-Based Compensation (Continued)

pursuant to any other type of award counts as 1.58 shares against the maximum number of shares issuable under the Plan for grants made on or after August 11, 2010 (and as 1.5 shares for grants made prior to that date). The Company’s policy for issuing shares upon exercise of stock options or the vesting of its restricted stock awards and restricted stock units is to issue shares of common stock at the time of exercise or conversion. At March 31, 2015, a total of approximately 1,841,000 shares were available for future issuance under the Plan.

Stock-Based Compensation

The following table summarizes stock-based compensation expense by financial statement line item in the Company’s consolidated statements of operations for the fiscal years ended March 31, 2015, 2014 and 2013 (in thousands):

	March 31,
	2015		2014		2013
	(in $000’s)
Cost of product revenue	$	665	$	614	$	450
Research and development		3,205		2,347		1,843
Selling, general and administrative		12,650		8,257		7,208
	$	16,520	$	11,218	$	9,501

The components of stock-based compensation for the fiscal years ended March 31, 2015, 2014 and 2013 were as follows (in thousands):

	March 31,
	2015		2014		2013
	(in $000’s)
Restricted stock units	$	13,524	$	8,008	$	5,970
Stock options		2,708		2,679		2,680
Restricted stock		15		314		653
Employee stock purchase plan		273		217		198
	$	16,520	$	11,218	$	9,501

Stock Options

The following table summarized stock option activity for the year ended March 31, 2015:

	Options (in thousands)			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (years)		Aggregate Intrinsic Value (in thousands)
Outstanding at beginning of year		3,492		$	13.27		4.92
Granted		322			22.83
Exercised		(911	)		11.99
Cancelled and expired		(11	)		18.34
Outstanding at end of year		2,892		$	14.72		5.18	$	164,439
Exercisable at end of year		2,150		$	11.95		4.08	$	128,200
Options vested and expected to vest at end of year		2,827		$	14.52		5.11	$	161,304

The remaining unrecognized stock-based compensation expense for unvested stock option awards at March 31, 2015 was approximately $4.6 million, net of forfeitures, and the weighted-average period over which this cost will be recognized is 2.1 years.

F-22

ABIOMED, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—(Continued)

Note 10. Stock Award Plans and Stock-Based Compensation (Continued)

The aggregate intrinsic value of options exercised for fiscal years 2015, 2014 and 2013 was $20.0 million, $16.3 million and $4.6 million, respectively. The total cash received as a result of employee stock option exercises during the years ended March 31, 2015, 2014 and 2013 was approximately $10.9 million, $9.4 million and $2.9 million, respectively. The total fair value of options vested in fiscal years 2015, 2014 and 2013 was $2.6 million, $2.5 million and $2.6 million, respectively.

The weighted average grant-date fair value for options granted during the years ended March 31, 2015, 2014 and 2013 was $9.29, $9.85 and $9.66 per share, respectively.

The Company estimates the fair value of each stock option granted at the grant date using the Black-Scholes option valuation model. The fair value of options granted during the years ended March 31, 2015, 2014 and 2013 were calculated using the following weighted average assumptions:

	2015			2014			2013
Risk-free interest rate		1.60	%		0.94	%		0.78	%
Expected option life (years)		4.19			4.25			4.31
Expected volatility		49.3	%		51.7	%		56.2	%

The risk-free interest rate is based on the U.S. Treasury yield curve in effect at the time of grant for a term consistent with the expected life of the stock options. Volatility assumptions are calculated based on the historical volatility of the Company’s stock and adjustments for factors not reflected in historical volatility that may be more indicative of future volatility. The Company estimates the expected term of options based on historical exercise experience and estimates of future exercises of unexercised options. An expected dividend yield of zero is used in the option valuation model because the Company does not pay cash dividends and does not expect to pay any cash dividends in the foreseeable future. The Company estimates forfeitures based on an analysis of actual historical forfeitures, adjusted to the extent historic forfeitures may not be indicative of forfeitures in the future.

Restricted Stock and Restricted Stock Units

The following table summarizes restricted stock and restricted stock unit activity for the fiscal year ended March 31, 2015:

	Number of Shares (in thousands)			Weighted Average Grant Date Fair Value (per share)
Restricted stock and restricted stock units at beginning of year		1,174		$	21.37
Granted		674			22.07
Vested		(543	)		20.67
Forfeited		(145	)		22.95
Restricted stock and restricted stock units at end of year		1,160		$	21.90

The remaining unrecognized compensation expense for outstanding restricted stock and restricted stock units, including performance-based awards, as of March 31, 2015 was $10.9 million and the weighted-average period over which this cost will be recognized is 1.7 years.

The weighted average grant-date fair value for restricted stock and restricted stock units granted during the years ended March 31, 2015, 2014 and 2013 was $22.07, $23.34 and $21.82 per share, respectively. The total fair value of restricted stock and restricted stock units vested in fiscal years 2015, 2014 and 2013 was $11.2 million, $6.0 million and $3.0 million, respectively.

Performance-Based Awards

Included in the restricted stock and restricted stock units activity discussed above are certain awards that vest subject to certain performance-based criteria.

F-23

ABIOMED, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—(Continued)

Note 10. Stock Award Plans and Stock-Based Compensation (Continued)

In May 2014, performance-based awards of restricted stock units for the potential issuance of 379,752 shares of common stock were issued to certain executive officers and employees, all of which vest upon achievement of prescribed service milestones by the award recipients and performance milestones by the Company. The Company met the prescribed performance milestones in fiscal 2015 such that the remaining outstanding 373,938 shares of common stock as of March 31, 2015 will vest subject to service requirements for vesting for these employees and the compensation expense is being recognized accordingly over the remaining service term.

In March 2014, the Company modified the performance condition on 50,000 restricted stock units originally granted in June 2011. As of March 31, 2015, the Company believes that it is probable that the prescribed performance milestones will be met and the compensation expense is being recognized accordingly.

In May 2013, performance-based awards of restricted stock units for the potential issuance of 268,988 shares of common stock were issued to certain executive officers and employees, all of which vest upon achievement of prescribed service milestones by the award recipients and performance milestones by the Company. The Company met the prescribed performance milestones in fiscal 2014 such that the remaining outstanding 149,265 shares of common stock as of March 31, 2015 will vest subject to service requirements for vesting for these employees and the compensation expense is being recognized accordingly over the remaining service term.

In May 2012, performance-based awards of restricted stock units for the potential issuance of 195,188 shares of common stock were issued to certain executive officers and employees of the Company, all of which will vest upon achievement of prescribed service milestones by the award recipients and performance milestones by the Company. The Company met the prescribed performance milestones in fiscal 2013 such that the remaining outstanding shares of common stock as of March 31, 2015 will vest subject to service requirements for vesting for these employees and the compensation expense is being recognized accordingly over the remaining service term.

During the year ended March 31, 2015, the Company has recorded $8.0 million in stock-based compensation expense for equity awards in which the prescribed performance milestones have been achieved or are probable of being achieved. The remaining unrecognized compensation expense related to these equity awards at March 31, 2015 is $4.3 million based on the Company’s current assessment of probability of achieving the performance milestones. The weighted-average period over which this cost will be recognized is 1.5 years.

Employee Stock Purchase Plan

The Company has an employee stock purchase plan, or ESPP. Under the ESPP, eligible employees, including officers and directors, who have completed at least three months of employment with the Company or its subsidiaries who elect to participate in the purchase plan instruct the Company to withhold a specified amount of the employee’s income each payroll period during a six-month payment period (the periods April 1—September 30 and October 1—March 31). On the last business day of each six-month payment period, the amount withheld is used to purchase shares of the Company’s common stock at an exercise price equal to 85% of the lower of its market price on the first business day or the last business day of the payment period. The Company recognized compensation expense of $0.3 million, $0.2 million and $0.2 million for the fiscal years ended March 31, 2015, 2014 and 2013, respectively, related to the ESPP.

F-24

ABIOMED, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—(Continued)

Note 11. Income Taxes

The components of the Company’s income tax benefit (provision) for the years ended March 31, 2015, 2014 and 2013 are as follows:

	2015			2014			2013
	(in $000’s)
Income before income taxes:
United States	$	22,243		$	4,267		$	10,202
Foreign		6,522			4,263			6,660
Income before income taxes	$	28,765		$	8,530		$	16,862
Current tax expense (benefit):
Federal	$	464		$	(100	)	$	97
State		424			(106	)		—
Foreign		1,283			525			996
		2,171			319			1,093
Deferred tax (benefit) expense:
Federal		(66,140	)		825			825
State		(13,430	)		35			(70	)
Foreign		(7,524	)		—			—
		(87,094	)		860			755
Total income tax (benefit) provision	$	(84,923	)	$	1,179		$	1,848

F-25

ABIOMED, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—(Continued)

Note 11. Income Taxes (Continued)

The components of the Company’s net deferred taxes were as follows:

	March 31,
	2015			2014
	(in $000’s)
Deferred tax assets
NOL carryforwards and tax credit carryforwards	$	60,081		$	72,430
Stock-based compensation		10,568			10,519
Nondeductible reserves and accruals		7,573			6,775
Amortizable intangibles other than goodwill		2,993			3,470
Capitalized research and development		1,597			3,208
Foreign NOL carryforwards		19,617			2,705
Deferred revenue		2,669			1,767
Depreciation		276			561
Other, net		1,298			658
		106,672			102,093
Deferred tax liabilities
Indefinite lived intangibles		(7,530	)		(6,415	)
In-process research and development		(4,443	)		—
Domestic deferred tax liability on foreign NOL carryforwards		(12,276	)		—
		(24,249	)		(6,415	)
Net deferred tax assets		82,423			95,678
Valuation allowance		(2,912	)		(102,093	)
Net deferred tax assets	$	79,511		$	(6,415	)
Reported as:
Current deferred tax assets, net	$	35,100		$	—
Long-term deferred tax assets, net		45,206			—
Long-term deferred tax liabilities		(795	)		(6,415	)
Net deferred tax assets	$	79,511		$	(6,415	)

F-26

ABIOMED, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—(Continued)

Note 11. Income Taxes (Continued)

A reconciliation of the federal statutory income tax rate to the Company’s effective income tax rate is as follows for the years ended March 31, 2015, 2014, and 2013:

	2015			2014			2013
Statutory income tax rate		35.0	%		34.0	%		34.0	%
(Decrease) increase resulting from:
Change in valuation allowance		(342.8	)		(53.7	)		(11.5	)
Credits		(1.9	)		(20.1	)		(17.0	)
Foreign taxes		4.5			—			—
State taxes, net		4.0			12.9			(6.9	)
Permanent differences		3.9			0.4			—
Stock based compensation		0.3			0.9			0.4
Rate differential on foreign operations		0.2			31.1			9.7
Expiry of state NOL carryforwards		—			—			2.1
Other		1.6			8.4			0.2
Effective tax rate		(295.2	)%		13.9	%		11.0	%

The Company classifies its deferred tax assets and liabilities as current or non-current based on the classification of the related asset or liability for financial reporting giving rise to the temporary difference. A deferred tax asset that is not related to an asset or liability for financial reporting, including deferred tax assets related to net operating loss (“NOL”) carryforwards, is classified in current or long-term according to the expected reversal date.

The Company regularly assesses its ability to realize its deferred tax assets. Assessing the realization of deferred tax assets requires significant management judgment. In determining whether its deferred tax assets are more likely than not realizable, the Company evaluated all available positive and negative evidence, and weighted the evidence based on its objectivity. Prior to March 31, 2015, the Company had determined that the objectively verifiable negative evidence outweighed the positive evidence due to its history of net operating losses incurred for most of its existence, the then-pending status of the Company’s Pre-Market Approval (“PMA”) application with the U.S. Food and Drug Administration (“FDA”) for its Impella 2.5 product in the U.S., among other factors, and as a result it recorded a full valuation allowance against its deferred tax assets.

During the quarter ended March 31, 2015, the Company determined based on its consideration of the weight of positive and negative evidence that there was sufficient positive evidence that most of its federal, state and certain foreign deferred tax assets are more likely than not recoverable as of March 31, 2015. The Company’s conclusion was primarily driven by the Company’s receipt of PMA approval for its Impella 2.5 product in March 2015, the $28.8 million of income before taxes in fiscal 2015, its history of profits in recent years and its expectation for sustainable future profitability now that it has obtained PMA approval for Impella 2.5. Accordingly, the Company recorded a $101.5 million reversal of the valuation allowance in the quarter ended March 31, 2015, primarily related to the Company expecting to be able to use NOL carryforwards in the future in the U.S. and Germany.

As of March 31, 2015, the remaining $2.9 million valuation allowance represents deferred tax assets related to NOL carryforwards in certain foreign jurisdictions in which the Company has had limited history of profitability. Based on the review of all available evidence, the Company recorded a valuation allowance to reduce these deferred tax assets to the amount that is more likely than not to be realizable as of March 31, 2015.

Changes in the valuation allowance for deferred tax assets during the years ended March 31, 2015 and 2014 were as follows:

	2015			2014
	(in $000’s)
Valuation allowance as of beginning of year	$	102,093		$	106,670
Decreases recorded as benefit to income tax provision		(101,468	)		(4,577	)
Increases due to foreign net operating loss in certain foreign jurisdictions		2,287			—
Valuation allowance as of end of year	$	2,912		$	102,093

F-27

ABIOMED, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—(Continued)

Note 11. Income Taxes (Continued)

At March 31, 2015, the Company had federal and state net operating loss carryforwards, or NOLs, of approximately $175.6 million which expire in varying years from fiscal 2016 through fiscal 2034. During the year ended March 31, 2015, state NOLs of approximately $1.5 million expired. At March 31, 2015, the Company had German NOLs of approximately $32.2 million, which do not expire. In addition, at March 31, 2015, the Company had federal and state research and development credit carryforwards of approximately $11.8 million and $5.2 million, respectively, which expire in varying years from fiscal 2016 through fiscal 2034.

Of the total amount of available U.S. federal NOLs, $63.0 million relates to stock-based compensation tax deductions in excess of stock-based compensation expense for financial reporting purposes (“excess tax benefits”). Excess tax benefits are realized when they reduce income taxes payable, as determined using a “with and without” method, and are credited to additional paid-in capital rather than as a reduction of the income tax provision. During the year ended March 31, 2015, the Company realized excess tax benefits from state tax deductions of $0.6 million which were credited to additional paid-in capital.

The Company and its subsidiaries are subject to U.S. federal income tax, as well as income tax of multiple state and foreign jurisdictions. Fiscal years 2012 through 2015 remain open to examination in Germany. All tax years remain subject to examination by the Internal Revenue Service and state tax authorities, because the Company has net operating loss and tax credit carryforwards which may be utilized in future years to offset taxable income, those years may also be subject to review by relevant taxing authorities if the carryforwards are utilized.

Note 12. Commitments and Contingencies

Commitments

The following is a description of the Company’s significant arrangements in which the Company is a guarantor.

Indemnifications—In many sales transactions, the Company indemnifies customers against possible claims of patent infringement caused by the Company’s products. The indemnifications contained within sales contracts usually do not include limits on the claims. The Company has never incurred any material costs to defend lawsuits or settle patent infringement claims related to sales transactions.

The Company enters into agreements with other companies in the ordinary course of business, typically with underwriters, contractors, clinical sites and customers that include indemnification provisions. Under these provisions the Company generally indemnifies and holds harmless the indemnified party for losses suffered or incurred by the indemnified party as a result of its activities. These indemnification provisions generally survive termination of the underlying agreement. The maximum potential amount of future payments the Company could be required to make under these indemnification provisions is unlimited. The Company has never incurred any material costs to defend lawsuits or settle claims related to these indemnification agreements. As a result, the estimated fair value of these agreements is immaterial. Accordingly, the Company has no liabilities recorded for these agreements as of March 31, 2015.

Clinical study agreements—In the Company’s clinical study agreements, the Company has agreed to indemnify the participating institutions against losses incurred by them for claims related to any personal injury of subjects taking part in the study to the extent they relate to uses of the Company’s devices in accordance with the clinical study agreement, the protocol for the device and the Company’s instructions. The indemnification provisions contained within the Company’s clinical study agreements do not generally include limits on the claims. The Company has never incurred any material costs related to the indemnification provisions contained in its clinical study agreements.

Facilities leases— The Company’s headquarters is located at 22 Cherry Hill Drive in Danvers, Massachusetts and consists of approximately 96,000 square feet of space under an operating lease as of March 31, 2015. On April 30, 2015, the Company entered into an amendment to the lease in which it agreed to lease an additional 24,560 square feet of space. In addition, the Company has certain rights to terminate the lease early, subject to the payment of a specified termination fee based on the timing of the termination, as further outlined in the lease amendment. The amendment also grants the Company a one-time right of first offer to lease new space in the facility and a one-time first right of refusal to buy the facility, subject to certain conditions set forth therein This facility encompasses most of its U.S. operations, including research and development, manufacturing, sales and marketing and general and administrative departments. The monthly lease payments over the term of the lease are as follows:

• The base rent for May 2014 through December 2015 is $74,050 per month; and

• The base rent for January 2016 through February 2016 will be $85,818 per month; and

• The base rent for March 2016 through February 2018 will be $82,518 per month; and

• The base rent for March 2018 through February 2021 will be $85,030 per month.

F-28

ABIOMED, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—(Continued)

Note 12. Commitments and Contingencies (Continued)

The Company’s European headquarters is located in Aachen, Germany and consists of approximately 33,000 square feet of space under an operating lease. In July 2013, the Company entered into a lease agreement to continue renting our existing space in Aachen, Germany through July 31, 2023. The lease payments are approximately 34,500€ (euro) (approximately U.S. $37,400 at March 31, 2015 exchange rates) per month. The building houses most of the manufacturing operations for the Impella product line as well as certain research and development functions and the sales, marketing and general and administrative functions for most of its product lines sold in Europe and the Middle East.

Total rent expense for the Company’s operating leases included in the accompanying consolidated statements of operations approximated $1.9 million, $1.5 million and $1.6 million for the fiscal years ended March 31, 2015, 2014 and 2013, respectively.

Future minimum lease payments under non-cancelable operating leases as of March 31, 2015 are approximately as follows:

Fiscal Year Ending March 31,
	(in $000s)
2016	$	1,511
2017		1,528
2018		1,510
2019		1,520
2020		1,520
Thereafter		2,109
Total future minimum lease payments	$	9,698

License agreements—In April 2014, the Company entered into an exclusive license agreement with Opsens, Inc. for the rights to certain optical sensor technologies in the field of cardio-circulatory assist devices. Under the agreement, the Company made a $1.5 million upfront payment upon execution of the agreement and agreed to make additional payments of up to $4.5 million upon achievement of development milestones.

The Company is also party to a license agreement related to certain circulatory care device patents and know-how. Under this agreement, the Company would be obligated to pay up to $3.0 million in cash or stock, if certain development and regulatory milestones are achieved.

Contingencies

From time to time, the Company is involved in legal and administrative proceedings and claims of various types. In some actions, the claimants seek damages, as well as other relief, which, if granted, would require significant expenditures. The Company records a liability in its consolidated financial statements for these matters when a loss is known or considered probable and the amount can be reasonably estimated. The Company reviews these estimates each accounting period as additional information is known and adjusts the loss provision when appropriate. If a matter is both probable to result in liability and the amounts of loss can be reasonably estimated, the Company estimates and discloses the possible loss or range of loss. If the loss is not probable or cannot be reasonably estimated, a liability is not recorded in its consolidated financial statements.

On October 26, 2012, the Company was informed that the Department of Justice, United States Attorney’s Office for the District of Columbia was conducting an investigation, or the “Marketing and Labeling Investigation”, focused on its marketing and labeling of the Impella 2.5. On October 31, 2012, the Company accepted service of a subpoena related to this investigation seeking documents related to the Impella 2.5. The Company believes that it has substantially complied with the subpoena and has submitted the requested documents to the United States Attorney’s Office. On September 13, 2013, the Company entered into a tolling agreement with the United States Attorney’s Office, pursuant to which the Company and the United States Attorney’s Office mutually agreed to toll the applicable statutes of limitations for all criminal, civil and administrative offenses and violations that could be charged or claimed against the Company as of that date. On May 27, 2014 and January 30, 2015, the Company executed extensions of the tolling agreement. These extensions expired on March 2, 2015. The investigation is ongoing and is unable to predict the ultimate outcome or determine whether a liability has been incurred or make an estimate of the reasonably possible liability, if any, that could result from any unfavorable outcome associated with this investigation. The Company has incurred significant expenses related to this investigation and it could continue to incur additional expenses in the future related to this action.

F-29

ABIOMED, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—(Continued)

Note 12. Commitments and Contingencies (Continued)

On February 6, 2015, the U.S. Court of Appeals for the First Circuit, or the First Circuit, affirmed the dismissal by the U.S. District Court for the District of Massachusetts, or the District Court, of a previously disclosed complaint brought by alleged purchasers of the Company’s common stock, on behalf of themselves and persons or entities that purchased or acquired common stock of the Company between August 5, 2011 and October 31, 2012. The complaint related to two previously reported complaints that were filed on November 16 and 19, 2012 and alleged that the Company and certain of its officers violated federal securities laws in connection with disclosures related to the Company’s marketing and labeling of the Impella 2.5 product and sought damages in an unspecified amount. The District Court consolidated these complaints, and a consolidated amended complaint was filed by the plaintiffs on May 20, 2013. On July 8, 2013, the defendants filed a motion to dismiss the consolidated class action. The Company does not expect any further activity related to this matter.

On April 25, 2014, the Company received a subpoena from the Boston regional office of the United States Department of Health and Human Services, or HHS, Office of Inspector General requesting materials relevant to the Company’s reimbursement of expenses and remuneration to healthcare providers for a six month period from July 2012 through December 2012 in connection with a civil investigation under the False Claims Act (the “FCA Investigation” and, together with the Marketing and Labeling Investigation, the “DOJ Investigations”). The Company submitted the requested documents to HHS and believes that it substantially complied with the subpoena. On November 6, 2014, the Company received notice from the Department of Justice, United States Attorney’s Office for the District of Massachusetts in the form of a Civil Investigative Demand (“CID”) requesting additional materials relating to this matter for the time period of January 1, 2012 through December 31, 2013. The Company is currently is the process of responding to the additional requests for information contained in the CID and intends to continue to cooperate with the U.S. Attorney’s Office in connection with the FCA investigation.

The Company is unable to estimate a potential liability with respect to the DOJ Investigations. There are numerous factors that make it difficult to meaningfully estimate possible loss or range of loss at this stage of these investigations and lawsuits, including that: the proceedings are in relatively early stages, there are significant factual and legal issues to be resolved and information obtained or rulings made during any lawsuits or investigations could affect the methodology for calculation. In addition, with respect to claims for which damages are the requested relief, no amount of loss or damages has been specified. Therefore, the Company is unable at this time to estimate its possible losses and accordingly, no adjustment has been made to the financial statements to reflect the outcome of these uncertainties.

Note 13. Accrued Expenses

Accrued expenses consisted of the following:

	March 31,
	2015		2014
	(in $000’s)
Employee compensation	$	15,978	$	11,967
Research and development		1,744		1,587
Sales and income taxes		1,506		1,445
Warranty		1,103		794
Professional, legal and accounting fees		710		1,304
Other		853		802
	$	21,894	$	17,899

Accrued employee compensation consists primarily of accrued bonuses, accrued commissions and accrued employee benefits at March 31, 2015 and 2014.

Note 14. Segment and Enterprise Wide Disclosures

The Company operates in one business segment—the research, development and sale of medical devices to assist or replace the pumping function of the failing heart. The Company’s chief operating decision maker (determined to be the Chief Executive Officer) does not manage any part of the Company separately, and the allocation of resources and assessment of performance are based on the Company’s consolidated operating results. Approximately 77% and 74% of the Company’s total consolidated assets are located within the U.S. as of March 31, 2015 and 2014, respectively. The remaining assets are mostly located in Europe and are primarily related to the Company’s Impella production

F-30

ABIOMED, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements—(Continued)

Note 14. Segment and Enterprise Wide Disclosures (Continued)

facility in Germany, and include goodwill and in-process research and development of $46.2 million and $38.0 million at March 31, 2015 and 2014, respectively, associated with the Impella acquisition in May 2005 and ECP acquisition in July 2014. Total assets outside of the U.S. excluding goodwill amounted to 10% and 8% of total consolidated assets at March 31, 2015 and 2014, respectively. International sales (sales outside the U.S. and primarily in Europe) accounted for 10%, 9% and 7% of total product revenue during the fiscal years ended March 31, 2015, 2014 and 2013, respectively.

Note 15. Quarterly Results of Operation (Unaudited)

The following is a summary of the Company’s unaudited quarterly results of operations for the fiscal years ending March 31, 2015 and 2014:

	Fiscal Year Ended March 31, 2015
	1st Quarter			2nd Quarter			3rd Quarter		4th Quarter			Total Year
	(in $000’s)
Total revenues	$	48,811		$	51,938		$	62,005	$	67,557		$	230,311
Cost of product revenue		9,689			9,612			9,838		10,806			39,945
Other operating expenses		40,660			38,148			38,504		44,388			161,700
Other income (expense), net		55			(3	)		38		9			99
Income (loss) before income taxes		(1,483	)		4,175			13,701		12,372			28,765
Income tax (benefit) provision(1)		226			336			1,017		(86,502	)		(84,923	)
Net income (loss)	$	(1,709	)	$	3,839		$	12,684	$	98,874		$	113,688
Basic net income (loss) per share	$	(0.04	)	$	0.09		$	0.31	$	2.40		$	2.80
Diluted net income (loss) per share	$	(0.04	)	$	0.09		$	0.30	$	2.24		$	2.65

	Fiscal Year Ended March 31, 2014
	1st Quarter			2nd Quarter		3rd Quarter		4th Quarter		Total Year
	(in $000’s)
Total revenues	$	42,670		$	44,345	$	46,195	$	50,433	$	183,643
Cost of product revenue		8,723			9,027		9,458		10,114		37,322
Other operating expenses		35,254			33,920		32,143		36,641		137,958
Other income (expense), net		(5	)		31		57		84		167
Income (loss) before income tax provision		(1,312	)		1,429		4,651		3,762		8,530
Income tax provision		411			370		258		140		1,179
Net income (loss)	$	(1,723	)	$	1,059	$	4,393	$	3,622	$	7,351
Basic net income (loss) per share	$	(0.04	)	$	0.03	$	0.11	$	0.09	$	0.19
Diluted net income (loss) per share	$	(0.04	)	$	0.03	$	0.11	$	0.09	$	0.18

(1) Net income for the quarter and year ended March 31, 2015 included an income tax benefit of $84.9 million, primarily due to the release of the valuation allowance on certain deferred tax assets in the quarter ended March 31, 2015.

F-31

ABIOMED, INC. AND SUBSIDIARIES

SCHEDULE II

Valuation and Qualifying Accounts

(in thousands)

Description	Balance at Beginning of Period		Additions		Deductions		Balance at End of Period
Allowance for Doubtful Accounts
Fiscal Year Ended March 31, 2013	$	230	$	200	$	294	$	136
Fiscal Year Ended March 31, 2014	$	136	$	81	$	32	$	185
Fiscal Year Ended March 31, 2015	$	185	$	115	$	123	$	177

EX-10.9

Exhibit 10.9

ABIOMED, Inc.

FOURTH AMENDED AND RESTATED

2008 STOCK INCENTIVE PLAN

SECTION 1. General Purpose of the Plan

The purpose of this ABIOMED, Inc. 2008 Stock Incentive Plan (the “Plan”) is to encourage and enable officers and employees of, and other persons providing services to, ABIOMED, Inc. (the “Company”) and its Affiliates to acquire a proprietary interest in the Company. It is anticipated that providing such persons with a direct stake in the Company’s welfare will assure a closer identification of their interests with those of the Company and its stockholders, thereby stimulating their efforts on the Company’s behalf and strengthening their desire to remain with the Company.

SECTION 2. Definitions

The following terms shall be defined as set forth below:

“Affiliate” means a parent corporation, if any, and each subsidiary corporation of the Company, as those terms are defined in Section 424 of the Code.

“Award” or “Awards”, except where referring to a particular category of grant under the Plan, shall include Incentive Stock Options, Non-Statutory Stock Options, Restricted Stock Awards, Unrestricted Stock Awards, Performance Share Awards, Restricted Stock Unit Awards, and Stock Appreciation Rights. Awards shall be evidenced by a written agreement (which may be in electronic form and may be electronically acknowledged and accepted by the recipient) containing such terms and conditions not inconsistent with the provisions of this Plan as the Committee shall determine.

“Board” means the Board of Directors of the Company.

“Cause” shall mean, with respect to any Award holder, a determination by the Company (including the Board) or any Affiliate that the Holder’s employment or other relationship with the Company or any such Affiliate should be terminated as a result of (i) a material breach by the Award holder of any agreement to which the Award holder and the Company (or any such Affiliate) are parties, (ii) any act (other than retirement) or omission to act by the Award holder that may have a material and adverse effect on the business of the Company, such Affiliate or any other Affiliate or on the Award holder’s ability to perform services for the Company or any such Affiliate, including, without limitation, the commission of any crime (other than an ordinary traffic violation), or (iii) any material misconduct or material neglect of duties by the Award holder in connection with the business or affairs of the Company or any such Affiliate.

“Change of Control” shall have the meaning set forth in Section 16.

“Code” means the Internal Revenue Code of 1986, as amended, and any successor Code, and related rules, regulations and interpretations.

“Committee” shall have the meaning set forth in Section 3.

“Disability” means disability as set forth in Section 22(e)(3) of the Code.

“Effective Date” means the date on which the Plan is approved by the Board of Directors as set forth in Section 18.

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“Eligible Person” shall have the meaning set forth in Section 5.

“Exchange Act” shall mean the Securities Exchange Act of 1934, as amended.

“Fair Market Value” on any given date means the closing price per share of the Stock on such date as reported by NASDAQ or such other registered national securities exchange on which the Stock is listed; provided, that, if there is no trading on such date, Fair Market Value shall be deemed to be the closing price per share on the last preceding date on which the Stock was traded. If the Stock is not listed on any registered national securities exchange, the Fair Market Value of the Stock shall be determined in good faith by the Committee.

“Incentive Stock Option” means any Stock Option designated and qualified as an “incentive stock option” as defined in Section 422 of the Code.

“Non-Employee Director” means any director who: (i) is not currently an officer of the Company or an Affiliate, or otherwise currently employed by the Company or an Affiliate, (ii) does not receive compensation, either directly or indirectly, from the Company or an Affiliate, for services rendered as a consultant or in any capacity other than as a director, except for an amount that does not exceed the dollar amount for which disclosure would be required pursuant to Rule 404(a) of Regulation S-K promulgated by the SEC, (iii) does not possess an interest in any other transaction for which disclosure would be required pursuant to Rule 404(a) of Regulation S-K, (iv) is not engaged in a business relationship for which disclosure would be required pursuant to Rule 404(b) of Regulation S-K, and (v) is an “independent director” as defined the marketplace rules of NASDAQ or such other registered national securities exchange on which the Stock is listed.

“Non-Statutory Stock Option” means any Stock Option that is not an Incentive Stock Option.

“Normal Retirement” means retirement in good standing from active employment with the Company and its Affiliates in accordance with the retirement policies of the Company and its Affiliates then in effect.

“Option” or “Stock Option” means any option to purchase shares of Stock granted pursuant to Section 6.

“Outside Director” means any director who (i) is not an employee of the Company or of any “affiliated group,” as such term is defined in Section 1504(a) of the Code, which includes the Company (an “Affiliated Group Member”), (ii) is not a former employee of the Company or any Affiliated Group Member who is receiving compensation for prior services (other than benefits under a tax-qualified retirement plan) during the Company’s or any Affiliated Group Member’s taxable year, (iii) has not been an officer of the Company or any Affiliated Group Member and (iv) does not receive remuneration from the Company or any Affiliated Group Member, either directly or indirectly, in any capacity other than as a director. “Outside Director” shall be determined in accordance with Section 162(m) of the Code and the Treasury regulations issued thereunder.

“Performance Share Award” means an Award of Performance Shares granted pursuant to Section 9.

“Restricted Stock Award” means an Award granted pursuant to Section 7.

“Restricted Stock Unit” means an unfunded and unsecured promise, denominated in shares of Stock, to deliver Stock or cash measured by the value of Stock in the future that is, or as to which the delivery of Stock or cash in lieu of Stock is, subject to the satisfaction of specified performance or other vesting conditions.

“Restricted Stock Unit Award” means an Award of Restricted Stock Units granted pursuant to Section 9.

“SEC” means the Securities and Exchange Commission or any successor authority.

“Stock” means the common stock, $0.01 par value per share, of the Company, subject to adjustments pursuant to Section 4.

“Stock Appreciation Right” means an Award granted pursuant to Section 10.

“Unrestricted Stock Award” means Awards granted pursuant to Section 8.

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SECTION 3. Administration of Plan; Committee Authority to Select Participants and Determine Awards.

(a) Committee. It is intended that the Plan shall be administered by the Compensation Committee of the Board (the “Committee”), consisting of not less than two (2) persons each of whom qualifies as an Outside Director and a Non-Employee Director, but the authority and validity of any act taken or not taken by the Committee shall not be affected if any person administering the Plan is not an Outside Director or a Non-Employee Director. Except as specifically reserved to the Board under the terms of the Plan, and subject to any limitations set forth in the charter of the Committee, the Committee shall have full and final authority to operate, manage and administer the Plan on behalf of the Company. The Board may establish an additional single-member committee (consisting of an executive officer) that shall have the power and authority to grant Awards to non-executive officers and to make all other determinations under the Plan with respect thereto.

(b) Powers of Committee. The Committee shall have the power and authority to grant and modify Awards consistent with the terms of the Plan, including the power and authority:

(i) to select the persons to whom Awards may from time to time be granted;

(ii) to determine the time or times of grant, and the extent, if any, of Incentive Stock Options, Non-Statutory Stock Options, Restricted Stock, Unrestricted Stock, Performance Shares, Restricted Stock Units, and Stock Appreciation Rights, or any combination of the foregoing, granted to any one or more participants;

(iii) to determine the number of shares to be covered by any Award;

(iv) to determine and modify the terms and conditions, including restrictions, not inconsistent with the terms of the Plan, of any Award, which terms and conditions may differ among individual Awards and participants, and to approve the form of written instruments evidencing the Awards and to approve any agreements modifying the terms and conditions of any Awards; provided, however, that no such action shall adversely affect rights under any outstanding Award without the participant’s consent;

(v) to accelerate the exercisability or vesting of all or any portion of any Award;

(vi) to extend the period in which any outstanding Stock Option or Stock Appreciation Right may be exercised; and

(vii) to adopt, alter and repeal such rules, guidelines and practices for administration of the Plan and for its own acts and proceedings as it shall deem advisable; to interpret the terms and provisions of the Plan and any Award (including related written instruments); to make all determinations it deems advisable for the administration of the Plan; to decide all disputes arising in connection with the Plan; and to otherwise supervise the administration of the Plan.

All decisions and interpretations of the Committee shall be binding on all persons, including the Company and Plan participants. No member or former member of the Committee or the Board shall be liable for any action or determination made in good faith with respect to this Plan.

SECTION 4. Shares Issuable under the Plan; Mergers; Substitution.

(a) Shares Issuable. The maximum number of shares of Stock which may be issued in respect of Awards (including Stock Appreciation Rights) granted under the Plan, subject to adjustment upon changes in capitalization of the Company as provided in this Section 4, shall be 7,900,000 shares; provided, however, that as of the date the Plan is approved by stockholders of the Company, such maximum number of shares issuable shall be increased by any shares of Stock available for future awards under the Company’s 2000 Stock Incentive Plan, 1998 Equity Incentive Plan or 1989 Non-Qualified Stock Option Plan for Non-Employee Directors (collectively, the “Current Plans”) as of such date. For purposes of this limitation, the shares of Stock underlying any Awards

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which are forfeited, cancelled, reacquired by the Company or otherwise terminated (other than by exercise), whether under the Plan or under the Current Plans, shall be added back to the shares of Stock with respect to which Awards may be granted under the Plan; provided, however, that shares of Stock used to pay the exercise price of a Stock Option pursuant to Section 6(d)(i)(ii) or (iii), or to pay withholding taxes with respect to an Award pursuant to Section 12(b), (or shares of Stock used to pay the exercise price of any award or to pay withholding taxes under corresponding provisions of any of the Current Plans), and shares of Stock subject to Stock Appreciation Rights (whether under the Plan or under any of the Current Plans) that are not issued upon the exercise of such Stock Appreciation Right, shall not be added back to the shares of Stock with respect to which Awards may be granted; and provided further any increase in the number of shares as a result of forfeiture, cancellation or reacquisition by the Company of shares pursuant to awards under the Current Plans shall not exceed 4,500,000 shares of Stock (subject to adjustment as provided in Section 4(c) below). Shares issued under the Plan may be authorized but unissued shares or shares reacquired by the Company. Solely for the purpose of applying the limitation on the maximum number of shares issuable as set forth in this Section 4(a) (and not for purposes of Section 4(b) below), any shares of Stock that are subject to Options or Stock Appreciation Rights shall be counted against this limit by one share of Stock for every one share of Stock subject to a grant, and any shares of Stock that are subject to Awards other than Options or Stock Appreciation Rights shall be counted against this limit (i) as 1.5 shares of Stock for every one share of Stock subject to a grant for Awards made prior to August 11, 2010 and (ii) as 1.58 shares of Stock for every one share of Stock subject to a grant for Awards made on or after August 11, 2010. As of the date the Plan is approved by stockholders of the Company, no additional awards shall be permitted to be granted from the Current Plans and all unexpired awards granted from the Current Plans shall continue in full force and operation except as they may be exercised, be terminated or lapse, by their own terms and conditions.

(b) Limitation on Awards. In no event may any Plan participant be granted Awards (including Stock Appreciation Rights) with respect to more than 300,000 shares of Stock in any calendar year. The number of shares of Stock relating to an Award granted to a Plan participant in a calendar year that is subsequently forfeited, cancelled or otherwise terminated shall continue to count toward the foregoing limitation in such calendar year. In addition, if the exercise price of an Award is subsequently reduced, the transaction shall be deemed a cancellation of the original Award and the grant of a new one so that both transactions shall count toward the maximum shares issuable in the calendar year of each respective transaction.

(c) Stock Dividends, Mergers, etc. In the event that after the effective date of the Plan, the Company effects a stock dividend, stock split or similar change in capitalization affecting the Stock, the Committee shall make appropriate adjustments in (i) the number and kind of shares of stock or securities with respect to which Awards may thereafter be granted (including without limitation the limitations set forth in Sections 4(a) and (b) above), (ii) the number and kind of shares remaining subject to outstanding Awards, and (iii) the exercise or purchase price in respect of such shares. In the event of any merger, consolidation, dissolution or liquidation of the Company, the Committee in its sole discretion may, as to any outstanding Awards, make such substitution or adjustment in the aggregate number of shares reserved for issuance under the Plan and in the number and purchase price (if any) of shares subject to such Awards as it may determine and as may be permitted by the terms of such transaction, or accelerate, amend or terminate such Awards upon such terms and conditions as it shall provide (which, in the case of the termination of the vested portion of any Award, shall require payment or other consideration which the Committee deems equitable in the circumstances), subject, however, to the provisions of Section 16.

(d) Substitute Awards. The Committee may grant Awards under the Plan in substitution for stock and stock based awards held by employees of another corporation who concurrently become employees of the Company or an Affiliate as the result of a merger or consolidation of the employing corporation with the Company or an Affiliate or the acquisition by the Company or an Affiliate of property or stock of the employing corporation. The Committee may direct that the substitute awards be granted on such terms and conditions as the Committee considers appropriate in the circumstances.

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SECTION 5. Eligibility.

Awards may be granted to officers, directors and employees of, and consultants and advisers to, the Company or its Affiliates (“Eligible Persons”).

SECTION 6. Stock Options.

The Committee may grant Stock Options to Eligible Persons. Any Stock Option granted under the Plan shall be in such form as the Committee may from time to time approve. Stock Options granted under the Plan may be either Incentive Stock Options (subject to compliance with applicable law) or Non-Statutory Stock Options. Unless otherwise so designated, an Option shall be a Non-Statutory Stock Option. To the extent that any Option does not qualify as an Incentive Stock Option, it shall constitute a Non-Statutory Stock Option. No Incentive Stock Option shall be granted under the Plan after the tenth anniversary of the date of adoption of the Plan by the Board. The Committee in its discretion may determine the effective date of Stock Options, provided, however, that grants of Incentive Stock Options shall be made only to persons who are, on the effective date of the grant, employees of the Company or an Affiliate. Stock Options granted pursuant to this Section 6 shall contain such additional terms and conditions, not inconsistent with the terms of the Plan, as the Committee shall deem desirable.

(a) Exercise Price. The exercise price per share for the Stock covered by a Stock Option granted pursuant to this Section 6 shall be determined by the Committee at the time of grant but shall be not less than one hundred percent (100%) of Fair Market Value on the date of grant. If an employee owns or is deemed to own (by reason of the attribution rules applicable under Section 424(d) of the Code) more than ten percent (10%) of the combined voting power of all classes of stock of the Company or any subsidiary or parent corporation and an Incentive Stock Option is granted to such employee, the exercise price shall be not less than one hundred ten percent (110%) of Fair Market Value on the date of grant.

(b) Option Term. The term of each Stock Option shall be fixed by the Committee, but no Stock Option shall be exercisable more than ten (10) years after the date the Stock Option is granted. If an employee owns or is deemed to own (by reason of the attribution rules of Section 424(d) of the Code) more than ten percent (10%) of the combined voting power of all classes of stock of the Company or any subsidiary or parent corporation and an Incentive Stock Option is granted to such employee, the term of such Incentive Stock Option shall be no more than five (5) years from the date of grant.

(c) Exercisability; Rights of a Stockholder. Stock Options shall become vested and exercisable at such time or times, whether or not in installments, as shall be determined by the Committee. The Committee may at any time accelerate the exercisability of all or any portion of any Stock Option. An optionee shall have the rights of a stockholder only as to shares acquired upon the exercise of a Stock Option and not as to unexercised Stock Options.

(d) Method of Exercise. Stock Options may be exercised in whole or in part, by delivering written notice of exercise to the Company, specifying the number of shares to be purchased. Payment of the purchase price may be made by delivery of cash or bank check or other instrument acceptable to the Committee in an amount equal to the exercise price of such Options, or, to the extent provided in the applicable agreement setting forth the terms and conditions of such Option, by one or more of the following methods:

(i) by delivery to the Company of shares of Stock of the Company having a fair market value equal in amount to the aggregate exercise price of the Options being exercised and not subject to restriction under any Company incentive plan; or

(ii) if the class of Stock is registered under the Exchange Act at such time, by delivery to the Company of a properly executed exercise notice along with irrevocable instructions to a broker to deliver promptly to the Company cash or a check payable and acceptable to the Company for the purchase price; provided that in the

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event that the optionee chooses to pay the purchase price as so provided, the optionee and the broker shall comply with such procedures and enter into such agreements of indemnity and other agreements as the Committee shall prescribe as a condition of such payment procedure (including, in the case of an optionee who is an executive officer of the Company, such procedures and agreements as the Committee deems appropriate in order to avoid any extension of credit in the form of a personal loan to such officer). The Company need not act upon such exercise notice until the Company receives full payment of the exercise price; or

(iii) by reducing the number of Option shares otherwise issuable to the optionee upon exercise of the Option by a number of shares of Common Stock having a fair market value equal to such aggregate exercise price of the Options being exercised; or

(iv) by any combination of such methods of payment.

The delivery of certificates representing shares of Stock to be purchased pursuant to the exercise of a Stock Option will be contingent upon receipt from the Optionee (or a purchaser acting in his stead in accordance with the provisions of the Stock Option) by the Company of the full purchase price for such shares and the fulfillment of any other requirements contained in the Stock Option or imposed by applicable law.

(e) Non-transferability of Options. Except as the Committee may provide with respect to a Non-Statutory Stock Option, no Stock Option shall be transferable other than by will or by the laws of descent and distribution and all Stock Options shall be exercisable, during the optionee’s lifetime, only by the optionee.

(f) Annual Limit on Incentive Stock Options. To the extent required for “incentive stock option” treatment under Section 422 of the Code, the aggregate Fair Market Value (determined as of the time of grant) of the Stock with respect to which Incentive Stock Options granted under this Plan and any other plan of the Company or its Affiliates become exercisable for the first time by an optionee during any calendar year shall not exceed $100,000.

SECTION 7. Restricted Stock Awards.

(a) Nature of Restricted Stock Award. The Committee in its discretion may grant Restricted Stock Awards to any Eligible Person, entitling the recipient to acquire, for such purchase price, if any, as may be determined by the Committee, shares of Stock subject to such restrictions and conditions as the Committee may determine at the time of grant (“Restricted Stock”), including continued employment and/or achievement of pre-established performance goals and objectives.

(b) Acceptance of Award. A participant who is granted a Restricted Stock Award shall have no rights with respect to such Award unless the participant shall have accepted the Award within sixty (60) days (or such shorter date as the Committee may specify) following the award date by making payment to the Company of the specified purchase price, if any, of the shares covered by the Award and by executing and delivering to the Company a written instrument that sets forth the terms and conditions applicable to the Restricted Stock in such form as the Committee shall determine.

(c) Rights as a Stockholder. Upon complying with Section 7(b) above, a participant shall have all the rights of a stockholder with respect to the Restricted Stock, including voting and dividend rights, subject to non-transferability restrictions and Company repurchase or forfeiture rights described in this Section 7 and subject to such other conditions contained in the written instrument evidencing the Restricted Award. Unless the Committee shall otherwise determine, certificates evidencing shares of Restricted Stock Award shall remain in the possession of the Company until such shares are vested as provided in Section 7(e) below.

(d) Restrictions. Shares of Restricted Stock may not be sold, assigned, transferred, pledged or otherwise encumbered or disposed of except as specifically provided herein. In the event of termination of employment by

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the Company and its Affiliates for any reason (including death, Disability, Normal Retirement and for Cause), any shares of Restricted Stock which have not then vested shall automatically be forfeited to the Company.

(e) Vesting of Restricted Stock. The Committee at the time of grant shall specify the date or dates and/or the attainment of pre-established performance goals, objectives and other conditions on which the non-transferability of the Restricted Stock and the Company’s right of forfeiture shall lapse. Subsequent to such date or dates and/or the attainment of such pre-established performance goals, objectives and other conditions, the shares on which all restrictions have lapsed shall no longer be Restricted Stock and shall be deemed “vested.” The Committee at any time may accelerate such date or dates and otherwise waive or, subject to Section 14, amend any conditions of the Award.

(f) Waiver, Deferral and Reinvestment of Dividends. The written instrument evidencing the Restricted Stock Award may require or permit the immediate payment, waiver, deferral or investment of dividends paid on the Restricted Stock.

SECTION 8. Unrestricted Stock Awards.

(a) Grant or Sale of Unrestricted Stock. The Committee in its discretion may grant or sell to any Eligible Person shares of Stock free of any restrictions under the Plan (“Unrestricted Stock”) at a purchase price determined by the Committee. Shares of Unrestricted Stock may be granted or sold as described in the preceding sentence in respect of past services or other valid consideration.

(b) Restrictions on Transfers. The right to receive unrestricted Stock may not be sold, assigned, transferred, pledged or otherwise encumbered, other than by will or the laws of descent and distribution.

SECTION 9. Performance Share Awards; Restricted Stock Unit Awards.

A Performance Share Award is an award entitling the recipient to acquire shares of Stock upon the attainment of specified performance goals. The Committee may make Performance Share Awards independent of or in connection with the granting of any other Award under the Plan. Performance Share Awards may be granted under the Plan to any Eligible Person. The Committee in its discretion shall determine whether and to whom Performance Share Awards shall be made, the performance goals applicable under each such Award (which may include, without limitation, continued employment by the recipient or a specified achievement by the recipient, the Company or any business unit of the Company), the periods during which performance is to be measured, and all other limitations and conditions applicable to the Award or the Stock issuable thereunder. Upon the attainment of the specified performance goal shares of Stock shall be issued pursuant to the Performance Share Award as soon as practicable thereafter, but in no event later than two and one-half months after the calendar year in which such performance goal is attained. The Committee in its discretion may also grant Restricted Stock Unit Awards to any Eligible Person, which may be in the form of Performance Shares, with such terms and conditions as the Committee may specify, including the time or times or the conditions under which the Restricted Stock Units shall vest and be settled.

SECTION 10. Stock Appreciation Rights.

The Committee in its discretion may grant Stock Appreciation Rights to any Eligible Person. A Stock Appreciation Right shall entitle the participant upon exercise thereof to receive from the Company, upon written request to the Company at its principal offices (the “Request”), a number of shares of Stock having an aggregate Fair Market Value equal to the product of (a) the excess of Fair Market Value, on the date of such Request, over the exercise price per share of Stock specified in such Stock Appreciation Right (which exercise price shall be not less than one hundred percent (100%) of Fair Market Value on the date of grant), multiplied by (b) the number of shares of Stock for which such Stock Appreciation Right shall be exercised. The term of each Stock Appreciation Right shall be fixed by the Committee, but no Stock Appreciation Right shall be exercisable more than ten (10) years after the date the Stock Appreciation Right is granted.

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SECTION 11. Termination of Stock Options and Stock Appreciation Rights.

(a) Incentive Stock Options:

(i) Termination by Death. If any participant’s employment by the Company and its Affiliates terminates by reason of death, any Incentive Stock Option owned by such participant may thereafter be exercised to the extent exercisable at the date of death, by the legal representative or legatee of the participant, for a period of one hundred eighty (180) days from the date of death, or until the expiration of the stated term of the Incentive Stock Option, if earlier.

(ii) Termination by Reason of Disability or Normal Retirement.

(A) Any Incentive Stock Option held by a participant whose employment by the Company and its Affiliates has terminated by reason of Disability may thereafter be exercised, to the extent it was exercisable at the time of such termination, for a period of ninety (90) days from the date of such termination of employment, or until the expiration of the stated term of the Incentive Stock Option, if earlier.

(B) Any Incentive Stock Option held by a participant whose employment by the Company and its Affiliates has terminated by reason of Normal Retirement may thereafter be exercised, to the extent it was exercisable at the time of such termination, for a period of ninety (90) days from the date of such termination of employment, or until the expiration of the stated term of the Incentive Stock Option, if earlier.

(C) The Committee shall have sole authority and discretion to determine whether a participant’s employment has been terminated by reason of Disability or Normal Retirement.

(iii) Termination for Cause. If any participant’s employment by the Company and its Affiliates has been terminated for Cause, as determined by the Committee in its sole discretion, any Incentive Stock Option held by such participant shall immediately terminate and be of no further force and effect.

(iv) Other Termination. Unless otherwise determined by the Committee, if a participant’s employment by the Company and its Affiliates terminates for any reason other than death, Disability, Normal Retirement or for Cause, any Incentive Stock Option held by such participant may thereafter be exercised, to the extent it was exercisable on the date of termination of employment, for thirty (30) days from the date of termination of employment or until the expiration of the stated term of the Incentive Stock Option, if earlier.

(b) Non-Statutory Stock Options and Stock Appreciation Rights. Any Non-Statutory Stock Option or Stock Appreciation Right granted under the Plan shall contain such terms and conditions with respect to its termination as the Committee, in its discretion, may from time to time determine.

SECTION 12. Tax Withholding and Notice.

(a) Payment by Participant. Each participant shall, no later than the date as of which the value of an Award or of any Stock or other amounts received thereunder first becomes includable in the gross income of the participant for Federal income tax purposes, pay to the Company, or make arrangements satisfactory to the Committee regarding payment of any Federal, state, local and/or payroll taxes of any kind required by law to be withheld with respect to such income. The Company and its Affiliates shall, to the extent permitted by law, have the right to deduct any such taxes from any payment of any kind otherwise due to the participant.

(b) Payment in Shares. A Participant may elect, with the consent of the Committee, to have such tax withholding obligation satisfied, in whole or in part, by (i) authorizing the Company to withhold from shares of Stock to be issued pursuant to an Award a number of shares with an aggregate Fair Market Value (as of the date the withholding is effected) that would satisfy the withholding amount due with respect to such Award, or (ii) delivering to the Company a number of shares of Stock with an aggregate Fair Market Value (as of the date

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the withholding is effected) that would satisfy the withholding amount due. For purposes of Section 4 hereof, shares of stock that are withheld by or delivered to the Company pursuant to this Section 12 shall not be added back to the shares of Stock with respect to which Awards may be granted under the Plan.

(c) Notice of Disqualifying Disposition. Each holder of an Incentive Stock Option shall agree to notify the Company in writing immediately after making a disqualifying disposition (as defined in Section 421(b) of the Code) of any Stock purchased upon exercise of an Incentive Stock Option.

SECTION 13. Transfer and Leave of Absence.

For purposes of the Plan, the following events shall not be deemed a termination of employment:

(a) a transfer to the employment of the Company from an Affiliate or from the Company to an Affiliate, or from one Affiliate to another;

(b) an approved leave of absence for military service or sickness, or for any other purpose approved by the Company, if the employee’s right to re-employment is guaranteed either by a statute or by contract or under the policy pursuant to which the leave of absence was granted or if the Committee otherwise so provides in writing; provided, that the vesting date or dates of any unvested Award held by such employee shall automatically be extended by a period of time equal to the period of such approved leave of absence.

SECTION 14. Amendments and Termination.

The Board may at any time amend or discontinue the Plan and the Committee may at any time amend or cancel any outstanding Award for the purpose of satisfying changes in law or for any other lawful purpose, but no such action shall adversely affect rights under any outstanding Award without the holder’s consent. Notwithstanding the foregoing, neither the Board nor the Committee shall have the power or authority to (i) decrease the exercise price of any outstanding Stock Option or Stock Appreciation Right, whether through amendment, cancellation and regrant, exchange or any other means, or (ii) cancel any outstanding Stock Option or Stock Appreciation Right at a time when its exercise price exceeds the fair market value of the underlying stock, in exchange for cash, in each case except for changes made pursuant to Section 4(c).

This Plan shall terminate as of the tenth anniversary of its effective date. The Board may terminate this Plan at any earlier time for any reason. No Award may be granted after the Plan has been terminated. No Award granted while this Plan is in effect shall be adversely altered or impaired by termination of this Plan, except with the consent of the holder of such Award. The power of the Committee to construe and interpret this Plan and the Awards granted prior to the termination of this Plan shall continue after such termination.

SECTION 15. Status of Plan.

With respect to the portion of any Award which has not been exercised and any payments in cash, Stock or other consideration not received by a participant, a participant shall have no rights greater than those of a general creditor of the Company unless the Committee shall otherwise expressly determine in connection with any Award or Awards.

SECTION 16. Change of Control Provisions.

(a) Upon the occurrence of a Change of Control as defined in this Section 16:

(i) subject to the provisions of clause (iii) below, after the effective date of such Change of Control, each holder of an outstanding Stock Option, Restricted Stock Award, Performance Share Award, Restricted Stock Unit Award or Stock Appreciation Right shall be entitled, upon exercise of such Award, to receive, in lieu of shares of Stock (or consideration based upon the Fair Market Value of Stock), shares of such stock or other securities, cash or

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property (or consideration based upon shares of such stock or other securities, cash or property) as the holders of shares of Stock received in connection with the Change of Control;

(ii) the Committee may accelerate, fully or in part, the time for exercise of, and waive any or all conditions and restrictions on, each unexercised and unexpired Stock Option, Restricted Stock Award, Performance Share Award, Restricted Stock Unit Award and Stock Appreciation Right, effective upon a date prior or subsequent to the effective date of such Change of Control, as specified by the Committee; or

(iii) each outstanding Stock Option, Restricted Stock Award, Performance Share Award, Restricted Stock Unit Award and Stock Appreciation Right may be cancelled by the Committee as of the effective date of any such Change of Control provided that (x) prior written notice of such cancellation shall be given to each holder of such an Award and (y) the Committee shall have accelerated the time for exercise of all such unexercised and unexpired Awards and each holder of such an Award shall have the right to exercise such Award, during the ten (10) day period preceding the effective date of such Change of Control.

(b) “Change of Control” shall mean the occurrence of any one of the following events:

(i) any “person” (as such term is used in Sections 13(d) and 14(d)(2) of the Exchange Act) becomes, after the Effective Date of this Plan, a “beneficial owner” (as such term is defined in Rule 13d-3 promulgated under the Exchange Act) (other than the Company, any trustee or other fiduciary holding securities under an employee benefit plan of the Company, or any corporation owned, directly or indirectly, by the stockholders of the Company in substantially the same proportions as their ownership of stock of the Company), directly or indirectly, of securities of the Company representing fifty percent (50%) or more of the combined voting power of the Company’s then outstanding securities; or

(ii) the consummation of a merger or consolidation of the Company with any other corporation or other entity, other than a merger or consolidation which would result in the voting securities of the Company outstanding immediately prior thereto continuing to represent (either by remaining outstanding or by being converted into voting securities of the surviving entity) more than fifty percent (50%) of the combined voting power of the voting securities of the Company or such surviving entity outstanding immediately after such merger or consolidation; or

(iii) the stockholders of the Company approve a plan of complete liquidation of the Company or an agreement for the sale or disposition by the Company of all or substantially all of the Company’s assets.

SECTION 17. General Provisions.

(a) No Distribution; Compliance with Legal Requirements. The Committee may require each person acquiring shares pursuant to an Award to represent to and agree with the Company in writing that such person is acquiring the shares without a view to distribution thereof.

No shares of Stock shall be issued pursuant to an Award until all applicable securities laws and other legal and stock exchange requirements have been satisfied. The Committee may require the placing of such stop orders, with respect to and restrictive legends on, certificates for Stock and Awards as it deems appropriate.

(b) Delivery of Stock Certificates. Delivery of stock certificates to participants under this Plan shall be deemed effected for all purposes when the Company or a stock transfer agent of the Company shall have delivered such certificates in the United States mail, addressed to the participant, at the participant’s last known address on file with the Company.

(c) Other Compensation Arrangements; No Employment Rights. Nothing contained in this Plan shall prevent the Board from adopting other or additional compensation arrangements, including trusts, subject to stockholder

A-10

approval if such approval is required; and such arrangements may be either generally applicable or applicable only in specific cases. The adoption of the Plan or grant of any Award under the Plan does not confer upon any employee any right to continued employment with the Company or any Affiliate.

(d) Lock-Up Agreement. By accepting any Award, the recipient shall be deemed to have agreed that, if so requested by the Company or by the underwriters managing any offering of securities of the Company that is the subject of a registration statement filed under the United States Securities Act of 1933, as amended from time to time (the “Act” ) , the recipient will not, without the prior written consent of the Company or such underwriters, as the case may be, sell, make any short sale of, loan, grant any option for the purchase of, or otherwise dispose of any shares subject to any such Award during the Lock-up Period, as defined below. The “Lock-Up Period” shall mean a period of time not to exceed 180 days, plus such additional number of days (not to exceed 35) as may reasonably be requested to enable the underwriter(s) of such offering to comply with Rule 2711(f) of the Financial Industry Regulatory Authority or any amendment or successor thereto from the effective date of the registration statement under the Act for such offering , or, if greater, such number of days as shall have been agreed to by each director and executive officer of the Company in connection with such offering in a substantially similar lock-up agreement by which each such director and executive officer is bound. If requested by the Company or such underwriters, the recipient shall enter into an agreement with such underwriters consistent with the foregoing.

SECTION 18. Effective Date of Plan.

This Plan shall become effective upon its adoption by the Company’s Board of Directors. If the Plan shall not be approved by the stockholders of the Company within twelve months following its adoption, this Plan shall terminate and be of no further force or effect.

SECTION 19. Governing Law.

This Plan shall be governed by, and construed and enforced in accordance with, the substantive laws of The Commonwealth of Massachusetts, without regard to its principles of conflicts of laws.

A-11

EX-10.13

Exhibit 10.13

ABIOMED, Inc.

Time-Based Restricted Stock Unit Award Agreement

This Time-Based Restricted Stock Unit Award Agreement (this “Agreement”) is made effective as of [GRANT DATE] (the “Grant Date”), between ABIOMED, Inc. (the “Company”), and [EMPLOYEE NAME] (the “Employee”), pursuant to the Company’s 2008 Stock Incentive Plan, as it may be amended from time to time (the “Plan”). This Agreement and the Award (as defined below) are expressly subject to all of the terms and conditions contained in the Plan, which is hereby incorporated herein by reference. In the event that any of the terms and conditions contained in this Agreement are inconsistent with the Plan, the terms of the Plan shall control. All capitalized terms not defined in this Agreement have the meanings specified in the Plan.

WITNESSETH:

1. Time-Based Restricted Stock Units. The Company hereby grants to the Employee on the Grant Date an award (the “Award”) consisting of the right to receive, on the terms provided herein and in the Plan, one share of common stock of the Company (“Stock”) with respect to each restricted stock unit forming part of the Award (collectively, the “Restricted Stock Units”), in each case, subject to adjustment pursuant to Section 4 of the Plan in respect of transactions occurring after the Grant Date. The Employee is hereby granted [        ] Restricted Stock Units. On each of the following dates (each, a “Vesting Date”), provided that the Employee remains continuously employed by the Company through such Vesting Date, the Employee shall be entitled to vest in the number of Restricted Stock Units as set forth below:

[DESCRIBE VESTING]

Notwithstanding the foregoing, the Restricted Stock Units, to the extent then unvested, shall be immediately and fully vested upon the closing of a Change of Control if (i) such Change of Control shall occur before the [        ] anniversary of the Grant Date and (ii) the Employee remains employed by the Company as of the closing of such Change of Control.

Certificates for the shares of Stock that are issuable as a result of the Restricted Stock Units vesting as set forth above shall be issued as soon as practicable following each Vesting Date, but in no event later than thirty days following each Vesting Date.

2. Termination of Employment. The Employee understands and agrees that if the Employee ceases to be an employee of the Company or a subsidiary of the Company at any time for any reason, whether because of any action of the Company or the Employee, the death or incapacity of the Employee or otherwise (the date of such termination of employment, the “Termination Date”), the Employee’s only rights under this Agreement shall be the right to receive Stock, if any, that was to be issued (but was not yet issued) pursuant to Restricted Stock Units vesting on a Vesting Date that was reached prior to the Termination Date, and the Employee shall have no right to the issuance of Stock with respect to any Restricted Stock Units vesting on a Vesting Date that is reached after the Termination Date and any Restricted Stock Units that are unvested on the Termination Date shall automatically be forfeited on such date.

3. Discretion of the Committee. Unless otherwise provided, the Committee shall make all determinations required to be made hereunder, including determinations required to be made by the Company, and shall interpret all provisions of this Agreement, as it deems necessary or desirable, in its sole and unfettered discretion. Such determinations and interpretations shall be binding and conclusive as to the Company and the Employee. If there shall be no Compensation Committee of the Company’s Board of Directors or if the Board of Directors shall determine that the Board of Directors shall administer this Agreement, all references herein to the Committee shall be deemed references to the Board of Directors.

4. Withholding Taxes.

(a) The Employee expressly acknowledges and agrees that the Employee’s rights hereunder, including the right to be issued shares of Stock upon the vesting of the Restricted Stock Units (or any portion thereof), are subject to the Employee’s promptly paying, or in respect of any later requirement of withholding being liable promptly to pay at such time as such withholdings are due, to the Company all taxes required to be withheld, if any (the “Withholding Obligation”).

(b) By accepting this Award, the Employee hereby acknowledges and agrees that, unless he or she provides notice to the Company at least two (2) days prior to a Time Vesting Date that he or she intends to satisfy the applicable Withholding Obligation by paying such amount in cash or with a check in a form acceptable to the Company and delivers such cash or check no later than such Time Vesting Date, he or she will have been deemed to have elected to have the Company hold back whole shares of Stock otherwise deliverable pursuant to Section 1 having a Fair Market Value sufficient to satisfy the Withholding Obligation (but not in excess of the applicable minimum statutory withholding obligations or such greater amount that would not result in adverse accounting consequences to the Company), with the Company accepting a payment in cash or by check by the Employee to the extent of any remaining balance of the Withholding Obligation not satisfied by such withholding of shares.

(c) The Employee expressly acknowledges that because the Award consists of an unfunded and unsecured promise by the Company to deliver Stock in the future, subject to the terms hereof, it is not possible to make a so-called “83(b) election” with respect to the Award.

5. No Rights to Employment. Nothing contained in this Agreement shall be construed as giving the Employee any right to continued employment with the Company, or to establish or maintain an on-going business relationship with the Company. The Employee acknowledges and agrees that the transactions contemplated hereunder do not constitute an express or implied promise of continued employment for any period, or at all.

6. No Rights as a Shareholder. The Employee shall have no rights as a shareholder of the Company as a result of this Agreement unless and until shares of Stock have been issued to the Employee pursuant to Section 1 above. Without limiting the generality of the foregoing and for the avoidance of doubt, the Employee shall not be entitled to vote any share of Stock subject to the Award or to receive or be credited with any dividend or other distribution declared

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and payable on any such share unless such share has been actually delivered hereunder and is held by the Employee on the record date for such vote or dividend (or other distribution), as the case may be.

7. Nontransferability. Neither the Award nor the Restricted Stock Units may be transferred. In the event the Award or the Restricted Stock Units are transferred, or in the event a spouse or domestic partner has or is deemed to have any community property rights with respect to the Award or the Restricted Stock Units, the transferee, spouse, or domestic partner, as applicable, will be subject to and bound by all terms and conditions of this Agreement and the Plan.

8. Notices. Any notices required to be given under this Agreement shall be sufficient if in writing and if sent by certified mail, return receipt requested, and addressed as follows:

If to the Company:

ABIOMED, Inc.

22 Cherry Hill Drive

Danvers, Massachusetts 01923

Attn: Chief Financial Officer

If to the Employee, at the address of the Employee set forth in the Company’s records or to such other address as either party may designate under the provisions hereof.

9. Form S-8 Prospectus. The Employee acknowledges having received and reviewed a copy of the prospectus required by Part I of Form S-8 relating to shares of Stock that may be issued under the Plan.

10. Section 409A of the Code. This Agreement shall be interpreted and administered in such a manner that all provisions relating to the grant and settlement of the Award are exempt from the requirements of Section 409A of the Code. In no event, however, will the Company or any other person have any liability to the Employee as a result, or in respect, of Section 409A of the Code.

11. Applicable Law This Agreement shall be construed and enforced in accordance with the laws of the State of Delaware, without giving effect to the conflict of law principles thereof. For the purpose of litigating any dispute that arises under this Agreement, whether at law or in equity, the parties hereby consent to exclusive jurisdiction in Massachusetts and agree that such litigation shall be conducted in the state courts of Middlesex County or the federal courts of the United States for the District of Massachusetts.

- 3 -

IN WITNESS WHEREOF, the parties have executed this Agreement as an instrument under seal effective as of the date written on the first page of this Agreement.

ABIOMED, Inc.
By:
	Michael R. Minogue Its: President and Chief Executive Officer
EMPLOYEE:
Name:	[EMPLOYEE NAME]
Acceptance date:

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EX-10.14

Exhibit 10.14

ABIOMED, Inc.

Performance- and Time-Based Restricted Stock Unit Award Agreement

This Performance- and Time-Based Restricted Stock Unit Award Agreement (this “Agreement”) is made effective as of [GRANT DATE] (the “Grant Date”), between ABIOMED, Inc. (the “Company”), and [EMPLOYEE NAME] (the “Employee”), pursuant to the Company’s 2008 Stock Incentive Plan, as it may be amended from time to time (the “Plan”). This Agreement and the Award (as defined below) are expressly subject to all of the terms and conditions contained in the Plan, which is hereby incorporated herein by reference. In the event that any of the terms and conditions contained in this Agreement are inconsistent with the Plan, the terms of the Plan shall control. All capitalized terms not defined in this Agreement have the meanings specified in the Plan.

WITNESSETH:

1. Performance- and Time-Based Restricted Stock Units. The Company hereby grants to the Employee on the Grant Date an award (the “Award”) consisting of the right to receive, on the terms provided herein and in the Plan, one share of common stock of the Company (“Stock”) with respect to each restricted stock unit forming part of the Award (collectively, the “Restricted Stock Units”), in each case, subject to adjustment pursuant to Section 4 of the Plan in respect of transactions occurring after the Grant Date. The Employee is hereby granted [        ] Restricted Stock Units. Shares of Stock shall only be issued to the Employee in respect of the Award to the extent that the terms of this Agreement and the Plan are satisfied and to the extent that the Employee meets both the performance-based vesting conditions and time-based vesting conditions set forth below.

2. Performance Vesting. The Restricted Stock Units shall performance vest and become performance-vested Restricted Stock Units (“Performance-Vested RSUs”), provided that the Employee remains continuously employed by the Company through the applicable performance-vesting date, as follows: [DESCRIBE PERFORMANCE BASED VESTING CONDITION]. Any Restricted Stock Units that are then outstanding and do not become Performance-Vested RSUs as a result of the performance goals hereunder not being satisfied shall automatically be forfeited upon [            ].

3. Time Vesting. The Performance-Vested RSUs shall only vest to the extent that they become vested based on time as provided for below. On each of the following dates (each, a “Time Vesting Date”), and provided that the Employee remains continuously employed by the Company through such Time Vesting Date, a portion of the Performance-Vested RSUs shall vest as set forth below:

[DESCRIBE TIME BASED VESTING CONDITION]

Notwithstanding the foregoing, the Restricted Stock Units shall be fully vested at [        ] of the Restricted Stock Units or, with the approval of the Committee (based in part on

actual performance at the time of such approval), at an amount over [            ] and up to [        ] of the Restricted Stock Units, upon the closing of a Change of Control if the Change of Control shall occur during [            ] and as to [            ] of the Performance-Vested RSUs if the Change of Control shall occur thereafter but before the [            ] anniversary of the Grant Date and in each case while the Employee remains employed by the Company. For purposes of this Agreement, the term “Time Vesting Date” shall also mean a Change of Control.

Certificates for the shares of Stock that are issuable as a result of the Performance-Vested RSUs or Restricted Stock Units, as applicable, vesting as set forth above shall be issued as soon as practicable following each Time Vesting Date, but in no event later than thirty (30) days following each Time Vesting Date.

4. Termination of Employment. The Employee understands and agrees that if the Employee ceases to be an employee of the Company or a subsidiary of the Company at any time for any reason, whether because of any action of the Company or the Employee, the death or incapacity of the Employee or otherwise (the date of such termination of employment, the “Termination Date”), the Employee’s only rights under this Agreement shall be the right to receive Stock, if any, that was to be issued (but was not yet issued) pursuant to Restricted Stock Units or Performance-Vested RSUs, as applicable, vesting on a Time Vesting Date that was reached prior to the Termination Date, and the Employee shall have no right to the issuance of Stock with respect to any Restricted Stock Units or Performance-Vested RSUs, as applicable, vesting on a Time Vesting Date that is reached after the Termination Date and any Restricted Stock Units or Performance-Vested RSUs, as applicable, that are unvested on the Termination Date shall automatically be forfeited on such date.

5. Discretion of the Committee. Unless otherwise provided, the Committee shall make all determinations required to be made hereunder, including determinations required to be made by the Company, which shall include determinations of [PERFORMANCE MEASUREMENT] and the calculation of the number of Performance-Vested RSUs hereunder, and shall interpret all provisions of this Agreement, as it deems necessary or desirable, in its sole and unfettered discretion. Such determinations and interpretations shall be binding and conclusive as to the Company and the Employee. If there shall be no Compensation Committee of the Company’s Board of Directors or if the Board of Directors shall determine that the Board of Directors shall administer this Agreement, all references herein to the Committee shall be deemed references to the Board of Directors.

6. Withholding Taxes.

(a) The Employee expressly acknowledges and agrees that the Employee’s rights hereunder, including the right to be issued shares of Stock upon the vesting of the Restricted Stock Units (or any portion thereof), are subject to the Employee’s promptly paying, or in respect of any later requirement of withholding being liable promptly to pay at such time as such withholdings are due, to the Company all taxes required to be withheld, if any (the “Withholding Obligation”).

(b) By accepting this Award, the Employee hereby acknowledges and agrees that, unless he or she provides notice to the Company at least two (2) days prior to a

- 2 -

Time Vesting Date that he or she intends to satisfy the applicable Withholding Obligation by paying such amount in cash or with a check in a form acceptable to the Company and delivers such cash or check no later than the Time Vesting Date, he or she will have been deemed to have elected to have the Company hold back whole shares of Stock otherwise deliverable pursuant to Section 3 having a Fair Market Value sufficient to satisfy the Withholding Obligation (but not in excess of the applicable minimum statutory withholding obligations or such greater amount that would not result in adverse accounting consequences to the Company), with the Company accepting a payment in cash or by check by the Employee to the extent of any remaining balance of the Withholding Obligation not satisfied by such withholding of shares.

(c) The Employee expressly acknowledges that because the Award consists of an unfunded and unsecured promise by the Company to deliver Stock in the future, subject to the terms hereof, it is not possible to make a so-called “83(b) election” with respect to the Award.

7. No Rights to Employment. Nothing contained in this Agreement shall be construed as giving the Employee any right to continued employment with the Company, or to establish or maintain an on-going business relationship with the Company. The Employee acknowledges and agrees that the transactions contemplated hereunder do not constitute an express or implied promise of continued employment for any period, or at all.

8. No Rights as a Shareholder. The Employee shall have no rights as a shareholder of the Company as a result of this Agreement unless and until shares of Stock have been issued to the Employee pursuant to Section 3 above. Without limiting the generality of the foregoing and for the avoidance of doubt, the Employee shall not be entitled to vote any share of Stock subject to the Award or to receive or be credited with any dividend or other distribution declared and payable on any such share unless such share has been actually delivered hereunder and is held by the Employee on the record date for such vote or dividend (or other distribution), as the case may be.

9. Nontransferability. Neither the Award nor the Restricted Stock Units may be transferred. In the event the Award or the Restricted Stock Units are transferred, or in the event a spouse or domestic partner has or is deemed to have any community property rights with respect to the Award or the Restricted Stock Units, the transferee, spouse, or domestic partner, as applicable, will be subject to and bound by all terms and conditions of this Agreement and the Plan.

10. Notices. Any notices required to be given under this Agreement shall be sufficient if in writing and if sent by certified mail, return receipt requested, and addressed as follows:

If to the Company:

ABIOMED, Inc.

22 Cherry Hill Drive

- 3 -

Danvers, Massachusetts 01923

Attn: Chief Financial Officer

If to the Employee, at the address of the Employee set forth in the Company’s records or to such other address as either party may designate under the provisions hereof.

11. Form S-8 Prospectus. The Employee acknowledges having received and reviewed a copy of the prospectus required by Part I of Form S-8 relating to shares of Stock that may be issued under the Plan.

12. Section 409A of the Code. This Agreement shall be interpreted and administered in such a manner that all provisions relating to the grant and settlement of the Award are exempt from the requirements of Section 409A of the Code. In no event, however, will the Company or any other person have any liability to the Employee as a result, or in respect of, of Section 409A of the Code.

13. Applicable Law. This Agreement shall be construed and enforced in accordance with the laws of the State of Delaware, without giving effect to the conflict of law principles thereof. For the purpose of litigating any dispute that arises under this Agreement, whether at law or in equity, the parties hereby consent to exclusive jurisdiction in Massachusetts and agree that such litigation shall be conducted in the state courts of Middlesex County or the federal courts of the United States for the District of Massachusetts.

- 4 -

IN WITNESS WHEREOF, the parties have executed this Agreement as an instrument under seal effective as of the date written on the first page of this Agreement.

ABIOMED, Inc.
By:
	Michael R. Minogue Its: President and Chief Executive Officer
EMPLOYEE:
Name:	[EMPLOYEE NAME]
Acceptance date:

- 5 -

EX-10.15

Exhibit 10.15

ABIOMED, Inc.

PERFORMANCE- AND TIME-BASED RESTRICTED STOCK UNIT AGREEMENT

This Performance- and Time-Based Restricted Stock Unit Award Agreement (this “Agreement”) is made effective as of [GRANT DATE] (the “Grant Date”), between ABIOMED, Inc. (the “Company”), and [EMPLOYEE NAME] (the “Employee”), pursuant to the Company’s 2008 Stock Incentive Plan, as it may be amended from time to time (the “Plan”). This Agreement and the Award (as defined below) are expressly subject to all of the terms and conditions contained in the Plan, which is hereby incorporated herein by reference. In the event that any of the terms and conditions contained in this Agreement are inconsistent with the Plan, the terms of the Plan shall control. All capitalized terms not defined in this Agreement have the meanings specified in the Plan.

WITNESSETH:

1. Performance- and Time-Based Restricted Stock Units. The Company hereby grants to the Employee on the Grant Date an award (the “Award”) consisting of the right to receive, on the terms provided herein and in the Plan, one share of common stock of the Company (“Stock”) with respect to each restricted stock unit forming part of the Award (collectively, the “Restricted Stock Units”), in each case, subject to adjustment pursuant to Section 4 of the Plan in respect of transactions occurring after the Grant Date. The Employee is hereby granted [        ] Restricted Stock Units. Shares of Stock shall only be issued to the Employee in respect of the Award to the extent that the terms and conditions of this Agreement and the Plan are satisfied and to the extent that the below performance-based vesting criteria are met and then only to the extent that the Employee has remained continuously employed by the Company through the time vesting dates set forth below. The Restricted Stock Units shall performance vest and become performance-vested Restricted Stock Units (“Performance-Vested RSUs”)” if [DESCRIBE PERFORMANCE-BASED VESTING CONDITION]. Any Restricted Stock Units that are then outstanding and do not become Performance-Vested RSUs as a result of the performance goals hereunder not being satisfied shall automatically be forfeited upon such performance goals not being satisfied.

On each of the following dates (each, a “Time Vesting Date”), and provided that the Employee remains continuously employed by the Company through such Time Vesting Date, a portion of the Performance-Vested RSUs shall vest as set forth below:

[DESCRIBE TIME-BASED VESTING CONDITIONS]

Notwithstanding the foregoing, the Performance-Vested RSUs shall be fully vested as to all (100%) of the Performance-Vested RSUs upon the closing of a Change of Control if the Change of Control shall occur (i) on or before [            ], (ii) after the [PERFORMANCE-BASED CONDITION] and (iii) while the Employee is employed by the Company. For purposes of this Agreement, “Time Vesting Date” shall also mean a Change of Control.

Certificates for the shares of Stock that are issuable as a result of the Performance-Vested RSUs vesting as set forth above shall be issued as soon as practicable following each Time Vesting Date, but in no event later than thirty (30) days following each Time Vesting Date.

2. Termination of Employment. The Employee understands and agrees that if the Employee ceases to be an employee of the Company or a subsidiary of the Company at any time for any reason, whether because of any action of the Company or the Employee, the death or incapacity of the Employee or otherwise (the date of such termination of employment, the “Termination Date”), the Employee’s only rights under this Agreement shall be the right to receive Stock, if any, that was to be issued (but was not yet issued) pursuant to Performance-Vesting RSUs vesting on a Time Vesting Date that was reached prior to the Termination Date, and the Employee shall have no right to the issuance of Stock with respect to any Performance-Vested RSUs vesting on a Time Vesting Date that is reached after the Termination Date and any Restricted Stock Units or Performance-Vested RSUs, as applicable, that are unvested on the Termination Date shall automatically be forfeited on such date.

3. Discretion of the Committee. Unless otherwise provided, the Committee shall make all determinations required to be made hereunder, including determinations required to be made by the Company, which shall include determinations of whether [PERFORMANCE-BASED CONDITION] has been obtained and the calculation of the number of Performance-Vested RSUs hereunder, and shall interpret all provisions of this Agreement, as it deems necessary or desirable, in its sole and unfettered discretion. Such determinations and interpretations shall be binding and conclusive as to the Company and the Employee. If there shall be no Compensation Committee of the Company’s Board of Directors or if the Board of Directors shall determine that the Board of Directors shall administer this Agreement, all references herein to the Committee shall be deemed references to the Board of Directors.

4. Withholding Taxes.

(a) The Employee expressly acknowledges and agrees that the Employee’s rights hereunder, including the right to be issued shares of Stock upon the vesting of the Restricted Stock Units (or any portion thereof), are subject to the Employee’s promptly paying, or in respect of any later requirement of withholding being liable promptly to pay at such time as such withholdings are due, to the Company all taxes required to be withheld, if any (the “Withholding Obligation”).

(b) By accepting this Award, the Employee hereby acknowledges and agrees that, unless he or she provides notice to the Company at least two (2) days prior to a Time Vesting Date that he or she intends to satisfy the applicable Withholding Obligation by paying such amount in cash or with a check in a form acceptable to the Company and delivers such cash or check no later than such Time Vesting Date, he or she will have been deemed to have elected to have the Company hold back whole shares of Stock otherwise deliverable pursuant to Section 3 having a Fair Market Value sufficient to satisfy the Withholding Obligation (but not in excess of the applicable minimum statutory withholding obligations or such greater amount that would not result in adverse accounting consequences to the Company), with the Company accepting a payment in cash or by check by the

- 2 -

Employee to the extent of any remaining balance of the Withholding Obligation not satisfied by such withholding of shares.

(c) The Employee expressly acknowledges that because the Award consists of an unfunded and unsecured promise by the Company to deliver Stock in the future, subject to the terms hereof, it is not possible to make a so-called “83(b) election” with respect to the Award.

5. No Rights to Employment. Nothing contained in this Agreement shall be construed as giving the Employee any right to continued employment with the Company, or to establish or maintain an on-going business relationship with the Company. The Employee acknowledges and agrees that the transactions contemplated hereunder do not constitute an express or implied promise of continued employment for any period, or at all.

6. No Rights as a Shareholder. The Employee shall have no rights as a shareholder of the Company as a result of this Agreement unless and until shares of Stock have been issued to the Employee pursuant to Section 1 above. Without limiting the generality of the foregoing and for the avoidance of doubt, the Employee shall not be entitled to vote any share of Stock subject to the Award or to receive or be credited with any dividend or other distribution declared and payable on any such share unless such share has been actually delivered hereunder and is held by the Employee on the record date for such vote or dividend (or other distribution), as the case may be.

7. Nontransferability. Neither the Award nor the Restricted Stock Units may be transferred. In the event the Award or the Restricted Stock Units are transferred, or in the event a spouse or domestic partner has or is deemed to have any community property rights with respect to the Award or the Restricted Stock Units, the transferee, spouse, or domestic partner, as applicable, will be subject to and bound by all terms and conditions of this Agreement and the Plan.

8. Notices. Any notices required to be given under this Agreement shall be sufficient if in writing and if sent by certified mail, return receipt requested, and addressed as follows:

If to the Company:

ABIOMED, Inc.

22 Cherry Hill Drive

Danvers, Massachusetts 01923

Attn: Chief Financial Officer

If to the Employee, at the address of the Employee set forth in the Company’s records or to such other address as either party may designate under the provisions hereof.

9. Form S-8 Prospectus. The Employee acknowledges having received and reviewed a copy of the prospectus required by Part I of Form S-8 relating to shares of Stock that may be issued under the Plan.

- 3 -

10. Section 409A of the Code. This Agreement shall be interpreted and administered in such a manner that all provisions relating to the grant and settlement of the Award are exempt from the requirements of Section 409A of the Code. In no event, however, will the Company or any other person have any liability to the Employee as a result, or in respect, of Section 409A of the Code.

11. Applicable Law. This Agreement shall be construed and enforced in accordance with the laws of the State of Delaware, without giving effect to the conflict of law principles thereof. For the purpose of litigating any dispute that arises under this Agreement, whether at law or in equity, the parties hereby consent to exclusive jurisdiction in Massachusetts and agree that such litigation shall be conducted in the state courts of Middlesex County or the federal courts of the United States for the District of Massachusetts.

- 4 -

IN WITNESS WHEREOF, the parties have executed this Agreement as an instrument under seal effective as of the date written on the first page of this Agreement.

ABIOMED, Inc.
By:
	Michael R. Minogue Its: President and Chief Executive Officer
EMPLOYEE:
Name:	[EMPLOYEE NAME]
Acceptance date:

- 5 -

EX-10.25

Exhibit 10.25

Summary of Executive Officer Compensation

The following executive officers of ABIOMED, Inc. are at will employees of ABIOMED, Inc. and have not entered into a formal employment agreement with ABIOMED, Inc. The current understanding between each employee and ABIOMED, Inc. with respect to the employee’s compensation is as follows:

Name	Base Salary			Target Fiscal 2016 Bonus (Percentage of Salary)
William J. Bolt		$	306,348		60%
Andrew J. Greenfield		$	290,759		60%
Michael G. Howley		$	318,964		65%

These officers are also eligible to receive grants of stock options and other awards at the discretion of ABIOMED’s Compensation Committee.

We have an employment agreement with our Chief Executive Officer, Michael R. Minogue, which sets forth the terms of his employment. Mr. Minogue’s current salary is $629,853 and his target bonus for fiscal 2016 is 120% of salary. We have an offer letter with our Chief Financial Officer, Robert L. Bowen, which sets forth the terms of his employment. Mr. Bowen’s current salary is $333,022 and his target bonus for fiscal 2016 is 60% of salary. We also have an offer letter with our Chief Operating Officer, David M. Weber, which sets forth the terms of his employment. Mr. Weber’s current salary is $364,396 and his target bonus for fiscal 2016 is 70% of salary.

EX-10.29

Exhibit 10.29

FIRST AMENDMENT TO LEASE

THIS FIRST AMENDMENT TO LEASE (this “Amendment”) is dated as of April 30, 2015, and made between Leo C. Thibeault, Jr., Trustee of The Thibeault Nominee Trust u/d/t dated November 20, 1996, recorded with the Essex South Registry of Deeds, Book 13856, Page 290 (“Lessor”), having a usual place of business at 513 Turtle Hatch Lane, Naples, FL 34103, and ABIOMED, Inc., a Delaware corporation (“Lessee”), having a usual place of business at 22 Cherry Hill Drive, Danvers, MA 01923, in connection with that certain lease between the Lessor and Lessee dated February 24, 2014 and relating to the premises located at 18-22 Cherry Hill Drive, Danvers, MA 01923 (the “Lease”).

Whereas, the parties wish to amend the Lease to expand the Premises (as defined in the Lease) leased by Lessee under the Lease from 96,000 square feet to 120,560, thereby adding 24,560 square feet (the “Added Space”) to the Premises, and

Whereas, the parties wish to make other amendments to the Lease related to the expansion of the Premises,

Now, therefore, it is hereby agreed as follows:

1. Attached hereto as Exhibit A is a diagram of the Added Space which is hereby added to the Premises for all purposes of the Lease. The Lessee shall have immediate access to the Added Space for permitting and fit-out purposes. The Lessee shall be solely responsible for obtaining all necessary building and other permits relating to Lessee’s fit-out work. All work performed by the Lessee shall be made in conformity with Section 12 of the Lease. The Lessor at his sole cost and expense shall gut the office space in the front of the Added Space and shall build a demising wall that shall divide the Added Space from the space in the Building retained by the Lessor. The demising wall shall be built using sheetrock or similar material and shall comply with applicable building code provisions.

2. The Lessee shall pay Base Rent for the Added Space at the rate of $5.75 per square foot from the earlier of Lessee’s occupancy of any portion of the Added Space and January 1, 2016 through February 2018, and $6.00 per square foot from March 2018 through February 2021. The monthly Base Rent for the Added Space shall therefore be $11,768.33 through February 2018 and $12,280.00 from March 2018 through February 2021. The total monthly Base Rent for the Premises through February 2016 shall therefore be $85,818.33. The total monthly Base Rent for the Premises for the period from March 2016 through February 2018 shall therefore be $82,518.33. The total monthly Base Rent for the Premises for the period from March 2018 through February 2021 shall therefore be $85,030.00.

3. Beginning upon the earlier of the Lessee’s occupancy of any portion of the Added Space and January 1, 2016, the Lessee’s “Proportionate Share” (as defined in Section 2 of the Lease) of the Building is hereby amended to be 73.29 %, which percentage shall thereafter be used for calculating the Additional Rent owed by Lessee and for all other purposes under the Lease.

4. As part of its fit-out work, the Lessee shall perform all electrical and other utility work necessary to separate and separately meter (whether by means of new meters or the connecting of the Added Space to the meters serving the existing Premises) all utilities serving the Added Space from the utilities serving the space in the Building retained by the Lessor. The Lessee shall be responsible for all utility charges relating to the Added Space in relation to each type of utility charge, upon the earlier of (i) the connecting of the applicable utility to any new or existing meter, (ii) the Lessee’s occupancy of any portion of the Added Space and (iii) January 1, 2016.

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5. Provided that there is no existing Event of Default at the time of its exercise of the Right of First Offer described in this Paragraph 5, the Lessee shall have a one-time Right of First Offer to lease any additional space within the Building as it becomes available to lease. The Lessor shall provide the Lessee with written notice of intention to lease, including terms and conditions under which the Lessor is willing to lease (the “Lease ROFO Notice”). Lessee shall have thirty (30) days from receipt of the Lease ROFO Notice to exercise this right, after which the right will terminate. If Lessee does not timely exercise its Right of First Offer under this Paragraph 5, Lessor may lease the space described in the Lease ROFO Notice to a third-party lessee; provided, however, that if Lessor does not within ninety (90) days effectuate such lease for an aggregate economic value (including rent and any concessions offered to tenant) equal to or greater than ninety-five percent (95%) of the aggregate economic value (including rent and any concessions offered to tenant) described in the Lease ROFO Notice, then Lessee’s Right of First Offer shall again apply with respect to such lease and the Lessor shall be required to first re-offer such lease to the Lessee in a Lease ROFO Notice as provided herein prior to proceeding with any such third-party lease. This Right of First Offer shall in all events expire on December 31, 2015.

6. Provided that there is no existing Event of Default at the time of its exercise of the Right of First Offer described in this Paragraph 6, the Lessee shall have a one-time Right of First Offer to buy the property known and numbered as 18-22 Cherry Hill Drive, Danvers, MA 01923 (the “Danvers Property”) as it becomes available to buy. The Lessor shall provide the Lessee with written notice of intention to sell, including terms and conditions under which the Lessor is willing to sell (the “Sale ROFO Notice”). Lessee shall have thirty (30) days from receipt of the Sale ROFO Notice to exercise this right, after which the right will terminate. If Lessee does not timely exercise its Right of First Offer under this Paragraph 6, Lessor may sell the Danvers Property to a third-party purchaser; provided, however, that if Lessor does not effectuate such sale for a purchase price equal to or greater than ninety-five percent (95%) of the purchase price set forth in the Sale ROFO Notice, then Lessee’s Right of First Offer shall again apply with respect to such sale and the Lessor shall be required to first re-offer such sale to the Lessee in a Sale ROFO Notice as provided herein prior to proceeding with any such third-party sale. This Right of First Offer shall in all events expire on the expiration of the term of the Lease including, if applicable, any extension of the term pursuant to Section 34 of the Lease.

7. All capitalized terms contained in this Amendment that are used without definition shall have the definition set forth in the Lease.

8. Each of the parties hereto represents to the other that it has the legal power, right and authority to enter into this Amendment and that the individuals executing this Amendment on behalf of each of Lessor and Lessee have the legal power, right and actual authority to bind Lessor and Lessee, respectively, to the terms and conditions hereof.

9. This Amendment may be executed in one or more counterparts, each of which shall be deemed an original.

10. Except as otherwise expressly modified or amended by this Amendment, the Lease remains unchanged and in full force and effect in accordance with its terms. In the event of a conflict between the Lease and this Amendment, this Amendment shall control. This Amendment shall be binding upon and inure to the benefit of the Lessor and the Lessee and their respective successors and assigns. The parties hereby reaffirm the terms and provisions of the Lease, as amended by this Amendment.

[Signatures on Following Page]

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Signed as a sealed instrument as of the date or dates indicated below.

Thibeault Nominee Trust, Lessor		ABIOMED, Inc., Lessee
By:	/s/ Leo C. Thibeault, Jr.	By:	/s/ Michael R. Minogue
Its:	Trustee	Its:	President and CEO

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EXHIBIT A

Added Space

[To Be Attached]

4

EXHIBIT A

EX-21.1

Exhibit 21.1

SUBSIDIARIES OF THE REGISTRANT

SUBSIDIARY	ORGANIZED UNDER LAWS OF
Abiomed R&D, Inc.	Delaware
ABD Holding Company, Inc.	Massachusetts
Abiomed Europe, GmbH	Germany
ECP Entwicklungsgesellschaft mbH	Germany
AIS GmbH Aachen Innovative Solutions	Germany
Abiomed SARL	France
Abiomed Limited	United Kingdom
Abiomed Athlone Ltd	Ireland
Abiomed Japan KK	Japan

EX-23.1

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement Nos. 333-23053, 333-38030, 333-65192, 333-38865, 333-66029, 333-103245, 333-114066, 333-123675, 333-123676, 333-132054, 333-152989, 333-176620 and 333-186613 on Form S-8 of our reports dated May 28, 2015, relating to the consolidated financial statements and financial statement schedule of ABIOMED, Inc. and subsidiaries, and the effectiveness of ABIOMED, Inc.’s and subsidiaries internal control over financial reporting, appearing in this Annual Report on Form 10-K of ABIOMED, Inc., for the year ended March 31, 2015.

/s/ DELOITTE & TOUCHE LLP

Boston, Massachusetts

May 28, 2015

EX-31.1

Exhibit 31.1

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER

I, Michael R. Minogue, certify that:

1. I have reviewed this annual report on Form 10-K of ABIOMED, Inc.

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 3a-15(f) and 15d-15(f)) for the registrant and we have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent function):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal controls over financial reporting.

Date: May 28, 2015	/S/ MICHAEL R. MINOGUE
	Michael R. Minogue
	President and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION OF PRINCIPAL ACCOUNTING OFFICER

I, Robert L. Bowen, certify that:

1. I have reviewed this annual report on Form 10-K of ABIOMED, Inc.

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 3a-15(f) and 15d-15(f)) for the registrant and we have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent function):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal controls over financial reporting.

Date: May 28, 2015	/S/ ROBERT L. BOWEN
	Robert L. Bowen
	Vice President, Chief Financial Officer

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. §1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report on Form 10-K of ABIOMED, Inc. (the “Company”) for the year ended March 31, 2015, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), each of the undersigned President and Chief Executive Officer and Chief Financial Officer of the Company, certifies, to the best knowledge and belief of the signatory, pursuant to Section 1350 of Chapter 63 of title 18 of the United States Code (18 U.S.C. 1350), as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/S/ MICHAEL R. MINOGUE	/S/ ROBERT L. BOWEN
Michael R. Minogue	Robert L. Bowen
President and Chief Executive Officer	Vice President, Chief Financial Officer
Date: May 28, 2015	Date: May 28, 2015

XML

Acquisitions - Additional Information (Detail) (USD $)	0 Months Ended	9 Months Ended	12 Months Ended
	Jul. 01, 2014	Mar. 31, 2015	Mar. 31, 2015	Jul. 01, 2014
Business Acquisition [Line Items]
Payments to acquire businesses, cash paid	$ 15,750,000
Expense for the change in fair value contingent consideration			510,000
Selling, general and administrative
Business Acquisition [Line Items]
Legal, consulting and other costs related to the acquisition included in consolidated statements of operations		1,100,000
ECP Entwicklungsgesellschaft mbH
Business Acquisition [Line Items]
Business acquisition, date of acquisition agreement			Jul. 01, 2014
Payments to acquire businesses, cash paid	13,000,000
Potential payouts payments	15,000,000			15,000,000
Business combination, contingent consideration arrangements, descriptions			With respect to such milestone payments, the share purchase agreement provides: • that, upon the earlier of (i) the Company’s receipt of European CE Marking approval relating to the sale of an expandable device based on certain patent rights acquired from ECP, or (ii) the Company bringing of a successful claim against a third party competitor (or reaching an economically equivalent settlement) for the infringement of certain patent rights acquired from ECP, it will pay Syscore an additional $7.0 million (provided that if such claim or settlement does not prohibit the third party competitor’s further marketing, production, sale, distribution, lease or use of any violating or infringing products, but only awards monetary damages to us or to Abiomed Europe, the amount payable to Syscore shall be limited to the lower of the amount of aggregate damages received and $7.0 million); and • that, upon the first to occur of (i) the Company’s successful commercialization of one or more rotatable and expandable devices based on certain patent rights acquired from ECP, where such devices achieve aggregate worldwide revenues of $125.0 million, including the revenues of third party licensees, or (ii) the Company’s sale of (A) ECP, (B) all or substantially all of ECP’s assets, or (C) certain of ECP’s patent rights, the Company will pay to Syscore the lesser of (y) one-half of the profits earned from such sale described in the foregoing item (ii), after accounting for the costs of acquiring and operating ECP, or (z) $15.0 million (less any previous milestone payment).
Expense due to infringement of certain patent rights acquired	7,000,000			7,000,000
Aggregate worldwide revenues, including revenues of third party licensees, targeted to be met for milestone payments	125,000,000			125,000,000
Revenues		0
Net loss		2,300,000
Expense for the change in fair value contingent consideration		500,000
AIS GmbH Aachen Innovative Solutions
Business Acquisition [Line Items]
Business acquisition, date of acquisition agreement			Jun. 30, 2014
Payments to acquire businesses, cash paid	$ 2,800,000

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Property and Equipment - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 2.7	$ 2.4	$ 2.5

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Marketable Securities and Fair Value Measurements - Additional Information (Detail) (USD $)	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Jan. 31, 2015	Nov. 30, 2014	Sep. 30, 2014	May 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Change in fair value of the contingent consideration	$ 510,000
Converted date of promissory note into preferred stock	May 19, 2015
Aggregate carrying amount of other investment	3,654,000	801,000
Other Investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Aggregate carrying amount of other investment	3,600,000	800,000
Convertible Debt Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost method investment, fair value			600,000	500,000
Promissory notes, interest rate			5.00%	0.00%
Convertible Debt Securities | Additional Investment commitment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost method investment, fair value			400,000
Equity Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost method investment, fair value	$ 1,000,000				$ 700,000	$ 800,000

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Future Minimum Lease Payments under All Significant Non Cancelable Operating Leases (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2016	$ 1,511
2017	1,528
2018	1,510
2019	1,520
2020	1,520
Thereafter	2,109
Total future minimum lease payments	$ 9,698

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Goodwill and In-Process Research and Development - Additional Information (Detail) (USD $)	1 Months Ended
	Jul. 31, 2014	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Goodwill and Intangible Assets Disclosure [Line Items]
Goodwill		$ 31,534,000	$ 37,990,000	$ 35,410,000
Accumulated impairment loss, goodwill		0
In-Process Research and Development	$ 18,500,000	$ 14,711,000
Fair value inputs, discount rate	22.50%

XML

Financial Instruments Measured at Fair Value (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, fair value disclosure	$ 123,553	$ 97,424
Contingent consideration	6,510
US Treasury mutual fund Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, fair value disclosure	19,487	31,487
US Government-sponsored Enterprises Debt Securities | Short-term Investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, fair value disclosure	90,070	24,176
US Government-sponsored Enterprises Debt Securities | Long-term Investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, fair value disclosure	13,996	41,761
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, fair value disclosure	123,553	97,424
Level 2 | US Treasury mutual fund Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, fair value disclosure	19,487	31,487
Level 2 | US Government-sponsored Enterprises Debt Securities | Short-term Investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, fair value disclosure	90,070	24,176
Level 2 | US Government-sponsored Enterprises Debt Securities | Long-term Investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, fair value disclosure	13,996	41,761
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration	$ 6,510

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Income Taxes (Tables)

12 Months Ended

Mar. 31, 2015

Income before Income Taxes

The components of the Company’s income tax benefit (provision) for the years ended March 31, 2015, 2014 and 2013 are as follows:

	2015			2014			2013
	(in $000’s)
Income before income taxes:
United States	$	22,243		$	4,267		$	10,202
Foreign		6,522			4,263			6,660
Income before income taxes	$	28,765		$	8,530		$	16,862
Current tax expense (benefit):
Federal	$	464		$	(100	)	$	97
State		424			(106	)		—
Foreign		1,283			525			996
		2,171			319			1,093
Deferred tax (benefit) expense:
Federal		(66,140	)		825			825
State		(13,430	)		35			(70	)
Foreign		(7,524	)		—			—
		(87,094	)		860			755
Total income tax (benefit) provision	$	(84,923	)	$	1,179		$	1,848

Components of Income Tax Benefit (Provision)

The components of the Company’s income tax benefit (provision) for the years ended March 31, 2015, 2014 and 2013 are as follows:

	2015			2014			2013
	(in $000’s)
Income before income taxes:
United States	$	22,243		$	4,267		$	10,202
Foreign		6,522			4,263			6,660
Income before income taxes	$	28,765		$	8,530		$	16,862
Current tax expense (benefit):
Federal	$	464		$	(100	)	$	97
State		424			(106	)		—
Foreign		1,283			525			996
		2,171			319			1,093
Deferred tax (benefit) expense:
Federal		(66,140	)		825			825
State		(13,430	)		35			(70	)
Foreign		(7,524	)		—			—
		(87,094	)		860			755
Total income tax (benefit) provision	$	(84,923	)	$	1,179		$	1,848

Components of Net Deferred Taxes

The components of the Company’s net deferred taxes were as follows:

	March 31,
	2015			2014
	(in $000’s)
Deferred tax assets
NOL carryforwards and tax credit carryforwards	$	60,081		$	72,430
Stock-based compensation		10,568			10,519
Nondeductible reserves and accruals		7,573			6,775
Amortizable intangibles other than goodwill		2,993			3,470
Capitalized research and development		1,597			3,208
Foreign NOL carryforwards		19,617			2,705
Deferred revenue		2,669			1,767
Depreciation		276			561
Other, net		1,298			658
		106,672			102,093
Deferred tax liabilities
Indefinite lived intangibles		(7,530	)		(6,415	)
In-process research and development		(4,443	)		—
Domestic deferred tax liability on foreign NOL carryforwards		(12,276	)		—
		(24,249	)		(6,415	)
Net deferred tax assets		82,423			95,678
Valuation allowance		(2,912	)		(102,093	)
Net deferred tax assets	$	79,511		$	(6,415	)
Reported as:
Current deferred tax assets, net	$	35,100		$	—
Long-term deferred tax assets, net		45,206			—
Long-term deferred tax liabilities		(795	)		(6,415	)
Net deferred tax assets	$	79,511		$	(6,415	)

Differences Between Federal Statutory Income Tax Rate and Effective Tax Rates

A reconciliation of the federal statutory income tax rate to the Company’s effective income tax rate is as follows for the years ended March 31, 2015, 2014, and 2013:

	2015			2014			2013
Statutory income tax rate		35.0	%		34.0	%		34.0	%
(Decrease) increase resulting from:
Change in valuation allowance		(342.8	)		(53.7	)		(11.5	)
Credits		(1.9	)		(20.1	)		(17.0	)
Foreign taxes		4.5			—			—
State taxes, net		4.0			12.9			(6.9	)
Permanent differences		3.9			0.4			—
Stock based compensation		0.3			0.9			0.4
Rate differential on foreign operations		0.2			31.1			9.7
Expiry of state NOL carryforwards		—			—			2.1
Other		1.6			8.4			0.2
Effective tax rate		(295.2	)%		13.9	%		11.0	%

Changes in Valuation Allowance for Deferred Tax Assets

Changes in the valuation allowance for deferred tax assets during the years ended March 31, 2015 and 2014 were as follows:

	2015			2014
	(in $000’s)
Valuation allowance as of beginning of year	$	102,093		$	106,670
Decreases recorded as benefit to income tax provision		(101,468	)		(4,577	)
Increases due to foreign net operating loss in certain foreign jurisdictions		2,287			—
Valuation allowance as of end of year	$	2,912		$	102,093

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Summary of Unaudited Quarterly Results of Operations (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended												12 Months Ended
	Mar. 31, 2015		Dec. 31, 2014		Sep. 30, 2014		Jun. 30, 2014		Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2015		Mar. 31, 2014	Mar. 31, 2013
Quarterly Financial Information Disclosure [Abstract]
Total revenues	$ 67,557		$ 62,005		$ 51,938		$ 48,811		$ 50,433	$ 46,195	$ 44,345	$ 42,670	$ 230,311		$ 183,643	$ 158,124
Cost of product revenue	10,806		9,838		9,612		9,689		10,114	9,458	9,027	8,723	39,945		37,322	31,596
Other operating expenses	44,388		38,504		38,148		40,660		36,641	32,143	33,920	35,254	161,700		137,958
Other income (expense), net	9		38		(3)		55		84	57	31	(5)	99		167	319
Income (loss) before income taxes	12,372		13,701		4,175		(1,483)		3,762	4,651	1,429	(1,312)	28,765		8,530	16,862
Income tax (benefit) provision	(86,502)	[1]	1,017	[1]	336	[1]	226	[1]	140	258	370	411	(84,923)	[1]	1,179	1,848
Net income (loss)	$ 98,874		$ 12,684		$ 3,839		$ (1,709)		$ 3,622	$ 4,393	$ 1,059	$ (1,723)	$ 113,688		$ 7,351	$ 15,014
Basic net income (loss) per share	$ 2.40		$ 0.31		$ 0.09		$ (0.04)		$ 0.09	$ 0.11	$ 0.03	$ (0.04)	$ 2.80		$ 0.19	$ 0.38
Diluted net income (loss) per share	$ 2.24		$ 0.30		$ 0.09		$ (0.04)		$ 0.09	$ 0.11	$ 0.03	$ (0.04)	$ 2.65		$ 0.18	$ 0.37

[1] Net income for the quarter and year ended March 31, 2015 included an income tax benefit of $84.9 million, primarily due to the release of the valuation allowance on certain deferred tax assets in the quarter ended March 31, 2015.

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Stockholders' Equity - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2015	Mar. 31, 2014	Nov. 30, 2012
Shareholders Equity [Line Items]
Class B Preferred Stock, par value		$ 0.01	$ 0.01
Class B Preferred Stock, Authorized		1,000,000	1,000,000
Class B Preferred Stock, Issued		0	0
Class B Preferred Stock, outstanding		0	0
Stock repurchased, shares	1,123,587
Stock repurchased, value	$ 15.0
Average cost of stock repurchased, per share	$ 13.39
Maximum
Shareholders Equity [Line Items]
Stock repurchase program, authorized				$ 15.0

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Accrued Expenses (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Payables and Accruals [Abstract]
Employee compensation	$ 15,978	$ 11,967
Research and development	1,744	1,587
Sales and income taxes	1,506	1,445
Warranty	1,103	794
Professional, legal and accounting fees	710	1,304
Other	853	802
Accrued expenses	$ 21,894	$ 17,899

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Summary of Significant Accounting Policies (Tables)

12 Months Ended

Mar. 31, 2015

Schedule of Earnings Per Share Basic And Diluted

	March 31,
	2015		2014		2013
Basic Net Income Per Share
Net income	$	113,688	$	7,351	$	15,014
Weighted average shares used in computing basic net income per share		40,632		39,334		39,113
Net income per share—basic	$	2.80	$	0.19	$	0.38

	March 31,
	2015		2014		2013
Diluted Net Income Per Share
Net income	$	113,688	$	7,351	$	15,014
Weighted average shares used in computing basic net income per share		40,632		39,334		39,113
Effect of dilutive securities		2,226		2,272		1,939
Weighted average shares used in computing diluted net income per share		42,858		41,606		41,052
Net income per share—diluted	$	2.65	$	0.18	$	0.37

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Components of Accounts Receivable (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Trade receivables	$ 32,005	$ 24,542
Allowance for doubtful accounts	(177)	(185)
Accounts receivable, net	$ 31,828	$ 24,357

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Pro Forma Consolidated Financial Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Revenue	$ 230,323	$ 183,689
Income before income taxes	28,871	4,802
Net income	$ 113,794	$ 3,623

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Schedule II Valuation and Qualifying Accounts (Detail) (Allowance for Doubtful Accounts, Current, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Allowance for Doubtful Accounts, Current
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 185	$ 136	$ 230
Additions	115	81	200
Deductions	123	32	294
Balance at End of Period	$ 177	$ 185	$ 136

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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
	Mar. 31, 2015 Customer	Mar. 31, 2014 Customer	Mar. 31, 2013 Customer
Summary Of Significant Accounting Policy [Line Items]
Number of customers accounted for more than 10% of total product revenues	0	0	0
Number of customers with an accounts receivable balance greater than 10% of total accounts receivable	0	0
Product warranty period	1 year
Expected dividend yield	0.00%
Interest and penalties related to uncertain tax positions	$ 0
Maximum
Summary Of Significant Accounting Policy [Line Items]
Maturity period of marketable security to be classified as cash equivalent	90 days
Maturity period of security to be classified as long-term marketable securities	5 years	5 years
Minimum
Summary Of Significant Accounting Policy [Line Items]
Maturity period of security to be classified as marketable securities	90 days
Maturity period of security to be classified as long-term marketable securities	1 year	1 year
Stock Options and Performance Shares
Summary Of Significant Accounting Policy [Line Items]
Shares excluded from the calculation of diluted weighted average shares outstanding	2,000	94,000	438,000
Machinery and Equipment | Maximum
Summary Of Significant Accounting Policy [Line Items]
Property and Equipment, useful life	5 years
Machinery and Equipment | Minimum
Summary Of Significant Accounting Policy [Line Items]
Property and Equipment, useful life	3 years
Computer Software | Maximum
Summary Of Significant Accounting Policy [Line Items]
Property and Equipment, useful life	5 years
Computer Software | Minimum
Summary Of Significant Accounting Policy [Line Items]
Property and Equipment, useful life	3 years
Furniture and Fixtures | Maximum
Summary Of Significant Accounting Policy [Line Items]
Property and Equipment, useful life	5 years
Furniture and Fixtures | Minimum
Summary Of Significant Accounting Policy [Line Items]
Property and Equipment, useful life	3 years
Leasehold Improvements
Summary Of Significant Accounting Policy [Line Items]
Leasehold improvements, useful life	Shorter of the lease term or the estimated useful lives

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Inventories - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Inventory [Line Items]
Write-down of inventory	$ 2,231	$ 2,012	$ 1,172

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Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended								12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Income Taxes [Line Items]
Income before income taxes	$ 12,372,000	$ 13,701,000	$ 4,175,000	$ (1,483,000)	$ 3,762,000	$ 4,651,000	$ 1,429,000	$ (1,312,000)	$ 28,765,000	$ 8,530,000	$ 16,862,000
Reversal of valuation									101,500,000
Valuation allowance	2,912,000				102,093,000				2,912,000	102,093,000
Net operating loss carry forwards expiration period									2016 through fiscal 2034.
Stock-based compensation tax deductions in excess of book compensation expense									606,000
Federal Ministry of Finance, Germany [Member]
Income Taxes [Line Items]
Net operating loss carry forwards	32,200,000								32,200,000
Federal
Income Taxes [Line Items]
Net operating loss carry forwards	175,600,000								175,600,000
Research and development credit carry forwards	11,800,000								11,800,000
Federal | NOLs relates to stock-based compensation tax deductions
Income Taxes [Line Items]
Net operating loss carry forwards	63,000,000								63,000,000
State
Income Taxes [Line Items]
Net operating loss carry forwards	175,600,000								175,600,000
Net operating loss carry forwards expired									1,500,000
Research and development credit carry forwards	$ 5,200,000								$ 5,200,000

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Summary of Stock Option Activity (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Options
Outstanding at beginning of year	3,492
Granted	322
Exercised	(911)
Cancelled and expired	(11)
Outstanding at end of year	2,892	3,492
Exercisable at end of year	2,150
Options vested and expected to vest at end of year	2,827
Weighted-Average Exercise Price
Outstanding at beginning of year	$ 13.27
Granted	$ 22.83
Exercised	$ 11.99
Cancelled and expired	$ 18.34
Outstanding at end of year	$ 14.72	$ 13.27
Exercisable at end of year	$ 11.95
Options vested and expected to vest at end of year	$ 14.52
Weighted-Average Remaining Contractual Term (years)
Outstanding	5 years 2 months 5 days	4 years 11 months 1 day
Exercisable at end of year	4 years 29 days
Options vested and expected to vest at end of year	5 years 1 month 10 days
Aggregate Intrinsic Value
Outstanding at end of year	$ 164,439
Exercisable at end of year	128,200
Options vested and expected to vest at end of year	$ 161,304

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Change in Fair Value of Contingent Consideration as Determined by Level 3 Inputs (Detail) (Contingent Consideration, ECP Entwicklungsgesellschaft mbH, Level 3, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2015
Contingent Consideration | ECP Entwicklungsgesellschaft mbH | Level 3
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Additions	$ 6,000
Payments	0
Change in fair value	510
Ending balance	$ 6,510

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Summary of Significant Accounting Policies

12 Months Ended

Mar. 31, 2015

Summary of Significant Accounting Policies

Note 2. Summary of Significant Accounting Policies

The accompanying consolidated financial statements reflect the application of certain significant accounting policies described below.

Principles of Consolidation

The accompanying consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation.

Use of Estimates

The preparation of financial statements in conformity with generally accepted accounting principles of the United States of America, or GAAP, requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. The Company bases its estimates on historical experience and various other factors believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying value of assets and liabilities that are not readily apparent from other sources. On an ongoing basis, the Company evaluates its estimates, including those related to revenue recognition, collectability of receivables, realizability of inventory, goodwill, intangible and long-lived assets, accrued expenses, stock-based compensation, income taxes including deferred tax assets and liabilities, contingencies and litigation. Provisions for depreciation are based on their estimated useful lives using the straight-line method. Some of these estimates can be subjective and complex and, consequently, actual results may differ from these estimates under different assumptions or conditions.

Cash Equivalents and Marketable Securities

The Company classifies any marketable security with a maturity date of 90 days or less at the time of purchase as a cash equivalent. Cash equivalents are carried on the balance sheet at fair market value.

The Company classifies any security with a maturity date of greater than 90 days at the time of purchase as marketable securities and classifies marketable securities with a maturity date of greater than one year from the balance sheet date as long-term marketable securities. Securities that the Company has the positive intent and ability to hold to maturity are reported at amortized cost and classified as held-to-maturity securities. If the Company does not have the intent and ability to hold a security to maturity, it reports the investment as available-for-sale securities. The Company reports available-for-sale securities at fair value, and includes unrealized gains and, to the extent deemed temporary, unrealized losses in stockholders’ equity. If any adjustment to fair value reflects a decline in the value of the investment, the Company considers available evidence to evaluate whether the decline is “other than temporary” and, if so, marks the security to market through a charge to unrealized loss on short-term marketable securities in the consolidated statements of operations.

Major Customers and Concentrations of Credit Risk

The Company primarily sells its products to hospitals and distributors. No customer accounted for more than 10% of total product revenues in fiscal year 2015, 2014 or 2013. No customer had an accounts receivable balance greater than 10% of total accounts receivable at March 31, 2015 and 2014.

Credit is extended based on an evaluation of a customer’s financial condition and generally collateral is not required. To date, credit losses have not been significant and the Company maintains an allowance for doubtful accounts based on its assessment of the collectability of accounts receivable. Receivables are geographically dispersed, primarily throughout the U.S., as well as in Europe and other foreign countries where formal distributor agreements exist.

Financial instruments which potentially subject the Company to a concentration of credit risk consist of cash, cash equivalents, short and long-term marketable securities and accounts receivable. Management mitigates credit risk by limiting the investment type and maturity to securities that preserve capital, maintain liquidity and have a high credit quality.

Financial Instruments

The Company’s financial instruments are comprised of cash and cash equivalents, marketable securities, accounts receivable, accounts payable and accrued expenses, the carrying amounts of which approximate fair market value as they are highly liquid and primarily short term in nature.

Inventories

Inventories are stated at the lower of cost or market. Cost is based on the first in, first out method. The Company regularly reviews inventory quantities on hand and writes down to its net realizable value any inventory that it believes to be impaired. Management considers forecast demand in relation to the inventory on hand, competitiveness of product offerings, market conditions and product life cycles when determining excess and obsolescence and net realizable value adjustments. Once inventory is written down and a new cost basis is established, it is not written back up if demand increases.

Property and Equipment

Property and equipment is recorded at cost less accumulated depreciation. Depreciation is computed using the straight line method based on estimated useful lives of three to five years for machinery and equipment, computer software, and furniture and fixtures. Leasehold improvements are amortized using the straight-line method over the shorter of the lease term or the estimated useful lives of the related assets. Expenditures for maintenance and repairs are expensed as incurred. Upon retirement or other disposition of assets, the costs and related accumulated depreciation are eliminated from the accounts and the resulting gain or loss is reflected in operating expenses.

Property and equipment is reviewed for impairment losses whenever events or changes in circumstances indicate the carrying amount may not be recoverable. An impairment loss would be recognized based on the amount by which the carrying value of the asset or asset group exceeds its fair value. Fair value is determined primarily using the estimated future cash flows associated with the asset or asset group under review discounted at a rate commensurate with the risk involved and other valuation techniques.

Goodwill

Goodwill is recorded when consideration for an acquisition exceeds the fair value of the net tangible and intangible assets acquired. Goodwill is not amortized, instead the Company evaluates goodwill for impairment at least annually at October 31, as well as whenever events or changes in circumstances suggest that the carrying amount may not be recoverable.

Goodwill impairment assessments are performed at the reporting unit level. The goodwill test involves a two-step process. The first step is a comparison of the reporting unit’s fair value to its carrying value. If the reporting unit’s fair value exceeds its carrying value, no further procedures are required. However, if the reporting unit’s fair value is less than the carrying value, an impairment of goodwill may exist, requiring a second step to measure the amount of impairment loss. If the implied fair value of goodwill is less than the recorded goodwill, an impairment charge is recorded for the difference.

In applying the goodwill impairment test, the Company may assess qualitative factors to determine whether it is more likely than not that the fair value of the reporting unit is less than its carrying value (“Step 0”). Qualitative factors may include, but are not limited to, macroeconomic conditions, industry conditions, the competitive environment, changes in the market for our products and services, regulatory and political developments, cost factors, and entity specific factors such as strategies and overall financial performance. If, after assessing these qualitative factors, the Company determines it is not more likely than not that the fair value of a reporting unit is less than its carry amount, then performing the two-step impairment test is unnecessary.

When necessary, the goodwill impairment test is performed at the reporting unit level by comparing the reporting unit’s carrying amount, including goodwill, to the fair value of the reporting unit. The Company estimates the fair value of its single reporting unit using a combination of the income approach and the market approach. The income approach incorporates the use of a discounted cash flow method in which the estimated future cash flows and terminal values for the reporting unit is discounted to a present value using an appropriate discount rate. Cash flow projections are based on management’s estimates of economic and market conditions which drive key assumptions of revenue growth rates, operating margins, capital expenditures and working capital requirements. The discount rate is based on the specific risk characteristics of the reporting unit and its underlying forecast. The market approach estimates fair value by comparing publicly traded companies with similar operating and investment characteristics as the reporting unit. The fair values determined by the market approach and income approach, are weighted to determine the fair value for the reporting unit based primarily on the similarity of the operating and investment characteristics of the reporting unit to the comparable publicly traded companies used in the market approach. In order to assess the reasonableness of the calculated reporting unit’s fair value, the Company also compares the reporting unit’s fair value to its market capitalization (per share stock price times number of common shares outstanding) and calculate an implied control premium (the excess of the reporting unit’s fair value over the market capitalization).

If the carrying amount of the reporting unit exceeds its fair value, then a second step is performed to measure the amount of impairment loss, if any, by comparing the fair value of each identifiable asset and liability in the reporting unit to the total fair value of the reporting unit. Any impairment loss is expensed in the consolidated statement of operations and is not reversed if the fair value subsequently increases.

In-Process Research and Development

In-process research and development, or IPR&D, assets are considered to be indefinite-lived until the completion or abandonment of the associated research and development projects. IPR&D assets represent the fair value assigned to technologies that are acquired, which at the time of acquisition have not reached technological feasibility and have no alternative future use. During the period that the IPR&D assets are considered indefinite-lived, they are tested for impairment on an annual basis, or more frequently if the Company becomes aware of any events occurring or changes in circumstances that indicate that the fair value of the IPR&D assets are less than their carrying amounts. If and when development is complete, which generally occurs upon regulatory approval and are able to commercialize products associated with the IPR&D assets, these assets are then deemed definite-lived and are amortized based on their estimated useful lives at that point in time. If development is terminated or abandoned, the Company may have a full or partial impairment charge related to the IPR&D assets, calculated as the excess of carrying value of the IPR&D assets over fair value.

Contingent Consideration

Contingent consideration is recorded as a liability and is the estimate of the fair value of potential milestone payments related to business acquisitions. Contingent consideration is measured at fair value using a discounted cash flow model utilizing significant unobservable inputs including the probability of achieving each of the potential milestones and an estimated discount rate associated with the risks of the expected cash flows attributable to the various milestones. Significant increases or decreases in any of the probabilities of success or changes in expected timelines for achievement of any of these milestones would result in a significantly higher or lower fair value of these milestones, respectively, and commensurate changes to the associated liability. The fair value of the contingent consideration at each reporting date is updated by reflecting the changes in fair value reflected within research and development expenses in our statement of operations.

Accrued Expenses

As part of the process of preparing its financial statements, the Company is required to estimate accrued expenses. This process involves identifying services that third parties have performed and estimating the level of service performed and the associated cost incurred on these services as of each balance sheet date in its financial statements. Examples of estimated accrued expenses include contract service fees, such as amounts due to clinical research organizations, investigators in conjunction with clinical trials, professional service fees, such as attorneys and accountants, and third party expenses relating to marketing efforts associated with commercialization of the Company’s product and product candidates. Accrued expenses also include estimates for payroll costs, such as bonuses and commissions. In the event that the Company does not identify certain costs that have been incurred or it under or over-estimates the level of services or the costs of such services, reported expenses for a reporting period could be overstated or understated. The date in which certain services commence, the level of services performed on or before a given date and the cost of services is often subject to the Company’s judgment. The Company makes these judgments and estimates based upon known facts and circumstances.

Revenue Recognition

The Company recognizes revenue when evidence of an arrangement exists, title has passed (generally upon shipment) or services have been rendered, the selling price is fixed or determinable and collectability is reasonably assured.

Revenue from product sales to customers is recognized when delivery has occurred. All costs related to product sales are recognized at time of delivery. The Company does not provide for rights of return to customers on product sales and therefore does not record a provision for returns.

Maintenance and service support contract revenues are included in product sales and are recognized ratably over the term of the service contracts. Revenue is recognized as earned in limited instances where the Company rents its console medical devices on a month-to-month basis or for a longer specified period of time to customers.

Government-sponsored research and development contracts and grants generally provide for payment on a cost-plus-fixed-fee basis. Revenues from these contracts and grants are recognized as work is performed, provided the government has appropriated sufficient funds for the work. Under contracts in which the Company elects to spend significantly more on the development project during the term of the contract than the total contract amount, the Company prospectively recognizes revenue on such contracts ratably over the term of the contract as related research and development costs are incurred.

Product Warranty

The Company generally provides a one-year warranty for certain products sold in which estimated contractual warranty obligations are recorded as an expense at the time of shipment and are included in accrued expenses in the accompanying consolidated balance sheets. The Company’s products are subject to regulatory and quality standards. Future warranty costs are estimated based on historical product performance rates and related costs to repair given products. The accounting estimate related to product warranty involves judgment in determining future estimated warranty costs. Should actual performance rates or repair costs differ from estimates, revisions to the estimated warranty liability would be required.

Translation of Foreign Currencies

The functional currency of the Company’s foreign subsidiaries is their local currency. The assets and liabilities of the Company’s foreign subsidiaries are translated into U.S. dollars at exchange rates in effect at the balance sheet date. Income and expense items are translated at the average exchange rates prevailing during the period. The cumulative translation effect for subsidiaries using a functional currency other than the U.S. dollar is included in accumulated other comprehensive income or loss as a separate component of stockholders’ equity.

The Company’s intercompany accounts are denominated in the functional currency of the foreign subsidiary. Gains and losses resulting from the remeasurement of intercompany receivables that the Company considers to be of a long-term investment nature are recorded as a cumulative translation adjustment in accumulated other comprehensive income or loss as a separate component of stockholders’ equity, while gains and losses resulting from the remeasurement of intercompany receivables from those foreign subsidiaries for which the Company anticipates settlement in the foreseeable future are recorded in the consolidated statement of operations. The net gains and losses recorded in the consolidated statements of operations for the years ended March 31, 2015, 2014 and 2013 were not significant.

Net Income Per Share

Basic net income per share is computed by dividing net income by the weighted average number of common shares outstanding during the fiscal year. Diluted net income per share is computed using the treasury stock method by dividing net income by the weighted average number of dilutive common shares outstanding during the fiscal year. Diluted shares outstanding is calculated by adding to the weighted average shares outstanding any potential dilutive securities outstanding for the fiscal year. Potential dilutive securities include stock options, restricted stock awards, restricted stock units, performance-based awards and shares to be purchased under the employee stock purchase plan. In fiscal years when a net loss is reported, all common stock equivalents are excluded from the calculation because they would have an anti-dilutive effect, meaning the loss per share would be reduced. Therefore, in periods when a loss is reported basic and dilutive loss per share are the same.

	March 31,
	2015		2014		2013
Basic Net Income Per Share
Net income	$	113,688	$	7,351	$	15,014
Weighted average shares used in computing basic net income per share		40,632		39,334		39,113
Net income per share—basic	$	2.80	$	0.19	$	0.38

	March 31,
	2015		2014		2013
Diluted Net Income Per Share
Net income	$	113,688	$	7,351	$	15,014
Weighted average shares used in computing basic net income per share		40,632		39,334		39,113
Effect of dilutive securities		2,226		2,272		1,939
Weighted average shares used in computing diluted net income per share		42,858		41,606		41,052
Net income per share—diluted	$	2.65	$	0.18	$	0.37

For the fiscal years ended March 31, 2015, 2014 and 2013, approximately 2,000, 94,000 and 438,000 shares of common stock underlying outstanding securities primarily related to out-of-the-money stock options and performance-based awards where milestones were not met were not included in the computation of diluted earnings per share because their inclusion would be anti-dilutive.

Stock-Based Compensation

The Company’s stock-based compensation cost is measured at the grant date based on the fair value of the award and is recognized as an expense over the requisite service period, and includes an estimate of awards that will be forfeited.

The fair value of stock option grants is estimated using the Black-Scholes option pricing model. Use of the valuation model requires management to make certain assumptions with respect to selected model inputs. The risk-free interest rate is based on the U.S. Treasury yield curve in effect at the time of grant for a term consistent with the expected life of the stock options. Volatility assumptions are calculated based on historical volatility of the Company’s stock. The Company estimates the expected term of options based on historical exercise experience and estimates of future exercises of unexercised options. In addition, an expected dividend yield of zero is used in the option valuation model because the Company does not pay dividends and does not expect to pay any cash dividends in the foreseeable future. Forfeitures are estimated based on an analysis of actual option forfeitures, adjusted to the extent historical forfeitures may not be indicative of forfeitures in the future.

For awards with service conditions only, the Company recognizes compensation cost on a straight-line basis over the requisite service period. For awards with service and performance conditions, the Company recognizes compensation costs using the graded vesting method over the requisite service period. Accruals of compensation cost for an award with performance conditions are based on the probable outcome of the performance conditions. The cumulative effect of changes in the probability outcomes are recorded in the period in which the changes occur.

Income Taxes

The Company’s provision for income taxes is comprised of a current and a deferred provision. The current income tax provision is calculated as the estimated taxes payable or refundable on tax returns for the current fiscal year. The deferred income tax provision is calculated for the estimated future income tax effects attributable to temporary differences and carryforwards using expected tax rates in effect in the years during which the differences are expected to reverse.

Deferred income taxes are recognized for the tax consequences in future years of differences between the tax bases of assets and liabilities and their financial reporting amounts at each fiscal year end based on enacted tax laws and statutory tax rates applicable to the periods in which the differences are expected to impact taxable income.

The Company regularly assesses its ability to realize its deferred tax assets. Assessing the realization of deferred tax assets requires significant management judgment. Valuation allowances are established when necessary to reduce net deferred tax assets to the amount that is more likely than not to be realized.

The Company recognizes and measures uncertain tax positions using a two-step approach. The first step is to evaluate the tax position for recognition by determining if, based on the technical merits, it is more likely than not that the position will be sustained upon audit, including resolution of related appeals or litigation processes, if any. The second step is to measure the tax benefit at the largest amount that is more than 50% likely of being realized upon ultimate settlement. The Company reevaluates these uncertain tax positions on a quarterly basis. This evaluation is based on factors including, but not limited to, changes in facts or circumstances, changes in tax laws, effectively settled issues under audit and new audit activity. Any changes in these factors could result in the recognition of a tax benefit or an additional charge to the tax provision. When applicable, the Company accrues for the effects of uncertain tax positions and the related potential penalties and interest through income tax expense. As of March 31, 2015, the Company has no material uncertain tax positions and no interest and penalties have been recognized to date.

Recent Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-09, Revenue from Contracts with Customers to provide updated guidance on revenue recognition. ASU 2014-09 requires a company to recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. In doing so, companies may need to use more judgment and make more estimates than under today’s guidance. These may include identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. This standard was initially released as effective for fiscal years beginning after December 15, 2016; however, the FASB has tentatively decided to defer the effective date of ASU 2014-09 for one year. The new guidelines can be implemented using either of the following transition methods: (i) a full retrospective approach reflecting the application of the standard in each prior reporting period with the option to elect certain practical expedients, or (ii) a retrospective approach with the cumulative effect of initially adopting ASU 2014-09 recognized at the date of adoption. The Company is currently evaluating the impact of this ASU on its consolidated financial statements and has not yet determined the method by which it will adopt the standard.

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Weighted Average Assumptions Used to Calculate Fair Value of Options Granted (Detail)	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Risk-free interest rate	1.60%	0.94%	0.78%
Expected option life (years)	4 years 2 months 9 days	4 years 3 months	4 years 3 months 22 days
Expected volatility	49.30%	51.70%	56.20%

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Marketable Securities (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Investment [Line Items]
Short-term marketable securities (within one year to maturity)	$ 109,557	$ 55,663
Long-term marketable securities (one to five years to maturity)	13,996	41,761
Available-for-sale securities, fair value disclosure	$ 123,553	$ 97,424

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Inventories (Tables)

12 Months Ended

Mar. 31, 2015

Components of Inventories

The components of inventories are as follows:

	March 31,
	2015		2014
	(in $000’s)
Raw materials and supplies	$	7,417	$	6,414
Work-in-progress		6,466		6,261
Finished goods		2,891		1,273
	$	16,774	$	13,948

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Accounts Receivable (Tables)

12 Months Ended

Mar. 31, 2015

Components of Accounts Receivable

The components of accounts receivable are as follows:

	March 31,
	2015			2014
	(in $000’s)
Trade receivables	$	32,005		$	24,542
Allowance for doubtful accounts		(177	)		(185	)
	$	31,828		$	24,357

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Goodwill Activity (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Goodwill [Line Items]
Beginning balance	$ 37,990	$ 35,410
Additions	1,964
Foreign currency translation impact	(8,420)	2,580
Ending balance	31,534	37,990
IPR&D
Goodwill [Line Items]
Beginning balance
Additions	18,500
Foreign currency translation impact	(3,789)
Ending balance	$ 14,711

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Marketable Securities (Parenthetical) (Detail)	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Maximum
Investment [Line Items]
Short-term marketable securities, maturity period	1 year	1 year
Long-term marketable securities, maturity period	5 years	5 years
Minimum
Investment [Line Items]
Long-term marketable securities, maturity period	1 year	1 year

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Property and Equipment (Tables)

12 Months Ended

Mar. 31, 2015

Components of Property and Equipment

The components of property and equipment are as follows:

	March 31,
	2015			2014
	(in $000’s)
Machinery and equipment	$	19,335		$	16,805
Furniture and fixtures		1,000			960
Leasehold improvements		2,874			1,876
Construction in progress		1,685			1,226
Total cost		24,894			20,867
Less accumulated depreciation		(15,767	)		(13,978	)
	$	9,127		$	6,889

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Goodwill and In-Process Research and Development (Tables)

12 Months Ended

Mar. 31, 2015

Goodwill Activity

The goodwill activity is as follows:

	March 31, 2015
	(in $000’s)
Balance at March 31, 2013	$	35,410
Foreign currency translation impact		2,580
Balance at March 31, 2014	$	37,990
Additions		1,964
Foreign currency translation impact		(8,420	)
Balance at March 31, 2015	$	31,534

Carrying value of In-Process Research and Development

The carrying value of the Company’s IPR&D assets and the change in the balance for the year ended March 31, 2015 is as follows:

	March 31, 2015
	(in $000’s)
Beginning balance	$	—
Additions		18,500
Foreign currency translation impact		(3,789	)
Ending balance	$	14,711

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Nature of Operations

12 Months Ended

Mar. 31, 2015

Nature of Operations

Note 1. Nature of Operations

Abiomed, Inc. (the “Company” or “Abiomed”) is a leading provider of mechanical circulatory support devices and offers a continuum of care in heart recovery to heart failure patients. The Company develops, manufactures and markets proprietary products that are designed to enable the heart to rest, heal and recover by improving blood flow and/or performing the pumping function of the heart. The Company’s products are used in the cardiac catheterization lab, or cath lab, by interventional cardiologists and in the heart surgery suite by heart surgeons for patients who are in need of hemodynamic support before, during or after angioplasty or heart surgery procedures.

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Stock Award Plans and Stock-Based Compensation (Tables)

12 Months Ended

Mar. 31, 2015

Stock-Based Compensation Recognized

The following table summarizes stock-based compensation expense by financial statement line item in the Company’s consolidated statements of operations for the fiscal years ended March 31, 2015, 2014 and 2013 (in thousands):

	March 31,
	2015		2014		2013
	(in $000’s)
Cost of product revenue	$	665	$	614	$	450
Research and development		3,205		2,347		1,843
Selling, general and administrative		12,650		8,257		7,208
	$	16,520	$	11,218	$	9,501

Components of Stock-Based Compensation

The components of stock-based compensation for the fiscal years ended March 31, 2015, 2014 and 2013 were as follows (in thousands):

	March 31,
	2015		2014		2013
	(in $000’s)
Restricted stock units	$	13,524	$	8,008	$	5,970
Stock options		2,708		2,679		2,680
Restricted stock		15		314		653
Employee stock purchase plan		273		217		198
	$	16,520	$	11,218	$	9,501

Summary of Stock Option Activity

The following table summarized stock option activity for the year ended March 31, 2015:

	Options (in thousands)			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (years)		Aggregate Intrinsic Value (in thousands)
Outstanding at beginning of year		3,492		$	13.27		4.92
Granted		322			22.83
Exercised		(911	)		11.99
Cancelled and expired		(11	)		18.34
Outstanding at end of year		2,892		$	14.72		5.18	$	164,439
Exercisable at end of year		2,150		$	11.95		4.08	$	128,200
Options vested and expected to vest at end of year		2,827		$	14.52		5.11	$	161,304

Weighted-Average Assumptions Used to Calculate Fair Value of Options Granted

The fair value of options granted during the years ended March 31, 2015, 2014 and 2013 were calculated using the following weighted average assumptions:

	2015			2014			2013
Risk-free interest rate		1.60	%		0.94	%		0.78	%
Expected option life (years)		4.19			4.25			4.31
Expected volatility		49.3	%		51.7	%		56.2	%

Summary of Restricted Stock and Restricted Stock Units Activity

The following table summarizes restricted stock and restricted stock unit activity for the fiscal year ended March 31, 2015:

	Number of Shares (in thousands)			Weighted Average Grant Date Fair Value (per share)
Restricted stock and restricted stock units at beginning of year		1,174		$	21.37
Granted		674			22.07
Vested		(543	)		20.67
Forfeited		(145	)		22.95
Restricted stock and restricted stock units at end of year		1,160		$	21.90

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Fair Value of the Consideration Transferred (Detail) (USD $) In Thousands, unless otherwise specified	0 Months Ended
	Jul. 01, 2014
Business Acquisition [Line Items]
Cash consideration	$ 15,750
Contingent consideration	6,000
Total consideration transferred	$ 21,750

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Components of Property and Equipment (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Property, Plant and Equipment [Line Items]
Machinery and equipment	$ 19,335	$ 16,805
Furniture and fixtures	1,000	960
Leasehold improvements	2,874	1,876
Construction in progress	1,685	1,226
Total cost	24,894	20,867
Less accumulated depreciation	(15,767)	(13,978)
Property and equipment, net	$ 9,127	$ 6,889

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Segment and Enterprise Wide Disclosures - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Segment Reporting Information [Line Items]
Number of business segments	1
Goodwill	31,534	37,990	35,410
United States
Segment Reporting Information [Line Items]
Percentage of total consolidated assets	77.00%	74.00%
Europe
Segment Reporting Information [Line Items]
Goodwill	46,200	38,000
International
Segment Reporting Information [Line Items]
Percentage of total consolidated assets, excluding goodwill	10.00%	8.00%
Percentage of total product revenue	10.00%	9.00%	7.00%

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Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Current assets:
Cash and cash equivalents	$ 22,401	$ 20,916
Short-term marketable securities	109,557	55,663
Accounts receivable, net	31,828	24,357
Inventories	16,774	13,948
Prepaid expenses and other current assets	4,479	3,082
Deferred tax assets, net	35,100
Total current assets	220,139	117,966
Long-term marketable securities	13,996	41,761
Property and equipment, net	9,127	6,889
Goodwill	31,534	37,990
In-Process Research and Development	14,711
Long-term deferred tax assets, net	45,206
Other assets	3,654	801
Total assets	338,367	205,407
Current liabilities:
Accounts payable	10,389	7,746
Accrued expenses	21,894	17,899
Deferred revenue	7,036	4,766
Total current liabilities	39,319	30,411
Other long-term liabilities	183	228
Contingent consideration	6,510
Long-term deferred tax liabilities	795	6,415
Total liabilities	46,807	37,054
Commitments and contingencies (Note 12)
Stockholders' equity:
Class B Preferred Stock, $.01 par value Authorized-1,000,000 shares; Issued and outstanding-none
Common stock, $.01 par value Authorized-100,000,000 shares; Issued-42,618,717 shares at March 31, 2015 and 41,122,695 shares at March 31, 2014; Outstanding-41,335,773 shares at March 31, 2015 and 39,916,328 shares at March 31, 2014	413	411
Additional paid in capital	465,046	436,136
Accumulated deficit	(137,222)	(250,910)
Treasury stock at cost-1,282,944 shares at March 31, 2015 and 1,206,367 shares at March 31, 2014	(19,347)	(16,554)
Accumulated other comprehensive loss	(17,330)	(730)
Total stockholders' equity	291,560	168,353
Total liabilities and stockholders' equity	$ 338,367	$ 205,407

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Investable Marketable Securities (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Market Value	$ 123,553	$ 97,424
US Treasury mutual fund Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Market Value	19,487	31,487
US Government-sponsored Enterprises Debt Securities | Short-term Investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Market Value	90,070	24,176
US Government-sponsored Enterprises Debt Securities | Long-term Investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Market Value	13,996	41,761
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized Cost	123,556	97,440
Gross Unrealized Gains	11	14
Gross Unrealized Losses	(14)	(30)
Fair Market Value	123,553	97,424
Level 2 | US Treasury mutual fund Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized Cost	19,487	31,487
Fair Market Value	19,487	31,487
Level 2 | US Government-sponsored Enterprises Debt Securities | Short-term Investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized Cost	90,070	24,174
Gross Unrealized Gains	9	6
Gross Unrealized Losses	(9)	(4)
Fair Market Value	90,070	24,176
Level 2 | US Government-sponsored Enterprises Debt Securities | Long-term Investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized Cost	13,999	41,779
Gross Unrealized Gains	2	8
Gross Unrealized Losses	(5)	(26)
Fair Market Value	$ 13,996	$ 41,761

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Consolidated Statements of Stockholders' Equity (USD $) In Thousands, except Share data	Total	Common Stock	Treasury Stock	Additional Paid in Capital	Accumulated Deficit	Accumulated Other Comprehensive (Loss) Income
Beginning Balance at Mar. 31, 2012	$ 126,297	$ 393	$ (827)	$ 401,771	$ (273,275)	$ (1,765)
Beginning Balance (in shares) at Mar. 31, 2012		39,272,754	50,954
Restricted stock issued (in shares)		91,503
Restricted stock issued		1		(1)
Stock options exercised (in shares)		337,212
Stock options exercised	2,936	3		2,933
Stock issued under employee stock purchase plan (in shares)		33,132
Stock issued under employee stock purchase plan	555			555
Stock issued to directors (in shares)		2,828
Stock issued to directors	51			51
Repurchase of common stock (in shares)		(1,123,587)	1,123,587
Repurchase of common stock	(15,045)		(15,045)
Return of common stock to pay withholding taxes on restricted stock (in shares)		(12,458)	12,458
Return of common stock to pay withholding taxes on restricted stock	(257)		(257)
Stock compensation expense	9,501			9,501
Other comprehensive income (loss)	(1,972)					(1,972)
Net income	15,014				15,014
Ending Balance at Mar. 31, 2013	137,080	397	(16,129)	414,810	(258,261)	(3,737)
Ending Balance (in shares) at Mar. 31, 2013		38,601,384	1,186,999
Restricted stock issued (in shares)		254,991
Restricted stock issued		3		(3)
Stock options exercised (in shares)		1,029,024
Stock options exercised	9,360	11		9,349
Stock issued under employee stock purchase plan (in shares)		43,779
Stock issued under employee stock purchase plan	697			697
Stock issued to directors (in shares)		6,518
Stock issued to directors	65			65
Return of common stock to pay withholding taxes on restricted stock (in shares)		(19,368)	19,368
Return of common stock to pay withholding taxes on restricted stock	(425)		(425)
Stock compensation expense	11,218			11,218
Other comprehensive income (loss)	3,007					3,007
Net income	7,351				7,351
Ending Balance at Mar. 31, 2014	168,353	411	(16,554)	436,136	(250,910)	(730)
Ending Balance (in shares) at Mar. 31, 2014		39,916,328	1,206,367
Restricted stock issued (in shares)		543,420
Restricted stock issued		5		(5)
Stock options exercised (in shares)	911,000	911,553
Stock options exercised	10,927	9		10,918
Stock issued under employee stock purchase plan (in shares)		39,095
Stock issued under employee stock purchase plan	795			795
Stock issued to directors (in shares)		1,954
Stock issued to directors	76			76
Return of common stock to pay withholding taxes on restricted stock (in shares)		(76,577)	76,577
Return of common stock to pay withholding taxes on restricted stock	(2,805)	(12)	(2,793)
Stock compensation expense	16,520			16,520
Excess tax benefit from stock-based awards	606			606
Other comprehensive income (loss)	(16,600)					(16,600)
Net income	113,688				113,688
Ending Balance at Mar. 31, 2015	$ 291,560	$ 413	$ (19,347)	$ 465,046	$ (137,222)	$ (17,330)
Ending Balance (in shares) at Mar. 31, 2015		41,335,773	1,282,944

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Stock-Based Compensation Recognized (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation	$ 16,520	$ 11,218	$ 9,501
Cost of product revenue
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation	665	614	450
Research and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation	3,205	2,347	1,843
Selling, general and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation	$ 12,650	$ 8,257	$ 7,208

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Accrued Expenses (Tables)

12 Months Ended

Mar. 31, 2015

Accrued Expenses

Accrued expenses consisted of the following:

	March 31,
	2015		2014
	(in $000’s)
Employee compensation	$	15,978	$	11,967
Research and development		1,744		1,587
Sales and income taxes		1,506		1,445
Warranty		1,103		794
Professional, legal and accounting fees		710		1,304
Other		853		802
	$	21,894	$	17,899

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Components of Net Deferred Taxes (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Deferred tax assets
NOL carryforwards and tax credit carryforwards	$ 60,081	$ 72,430
Stock-based compensation	10,568	10,519
Nondeductible reserves and accruals	7,573	6,775
Amortizable intangibles other than goodwill	2,993	3,470
Capitalized research and development	1,597	3,208
Foreign NOL carryforwards	19,617	2,705
Deferred revenue	2,669	1,767
Depreciation	276	561
Other, net	1,298	658
Deferred Tax Assets, Gross, Total	106,672	102,093
Deferred tax liabilities
Indefinite lived intangibles	(7,530)	(6,415)
In-process research and development	(4,443)
Domestic deferred tax liability on foreign NOL carryforwards	(12,276)
Deferred Tax Liabilities, Net	(24,249)	(6,415)
Net deferred tax assets	82,423	95,678
Valuation allowance	(2,912)	(102,093)
Net deferred tax assets	79,511	(6,415)
Current deferred tax assets, net	35,100
Long-term deferred tax assets, net	45,206
Long-term deferred tax liabilities	(795)	(6,415)
Net deferred tax assets	$ 79,511	$ (6,415)

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Quarterly Results of Operation

12 Months Ended

Mar. 31, 2015

Quarterly Results of Operation

Note 15. Quarterly Results of Operation (Unaudited)

The following is a summary of the Company’s unaudited quarterly results of operations for the fiscal years ending March 31, 2015 and 2014:

	Fiscal Year Ended March 31, 2015
	1st Quarter			2nd Quarter			3rd Quarter		4th Quarter			Total Year
	(in $000’s)
Total revenues	$	48,811		$	51,938		$	62,005	$	67,557		$	230,311
Cost of product revenue		9,689			9,612			9,838		10,806			39,945
Other operating expenses		40,660			38,148			38,504		44,388			161,700
Other income (expense), net		55			(3	)		38		9			99
Income (loss) before income taxes		(1,483	)		4,175			13,701		12,372			28,765
Income tax (benefit) provision(1)		226			336			1,017		(86,502	)		(84,923	)
Net income (loss)	$	(1,709	)	$	3,839		$	12,684	$	98,874		$	113,688
Basic net income (loss) per share	$	(0.04	)	$	0.09		$	0.31	$	2.40		$	2.80
Diluted net income (loss) per share	$	(0.04	)	$	0.09		$	0.30	$	2.24		$	2.65

	Fiscal Year Ended March 31, 2014
	1st Quarter			2nd Quarter		3rd Quarter		4th Quarter		Total Year
	(in $000’s)
Total revenues	$	42,670		$	44,345	$	46,195	$	50,433	$	183,643
Cost of product revenue		8,723			9,027		9,458		10,114		37,322
Other operating expenses		35,254			33,920		32,143		36,641		137,958
Other income (expense), net		(5	)		31		57		84		167
Income (loss) before income tax provision		(1,312	)		1,429		4,651		3,762		8,530
Income tax provision		411			370		258		140		1,179
Net income (loss)	$	(1,723	)	$	1,059	$	4,393	$	3,622	$	7,351
Basic net income (loss) per share	$	(0.04	)	$	0.03	$	0.11	$	0.09	$	0.19
Diluted net income (loss) per share	$	(0.04	)	$	0.03	$	0.11	$	0.09	$	0.18

(1) Net income for the quarter and year ended March 31, 2015 included an income tax benefit of $84.9 million, primarily due to the release of the valuation allowance on certain deferred tax assets in the quarter ended March 31, 2015.

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Quarterly Results of Operation (Tables)

12 Months Ended

Mar. 31, 2015

Summary of Unaudited Quarterly Results of Operations

The following is a summary of the Company’s unaudited quarterly results of operations for the fiscal years ending March 31, 2015 and 2014:

	Fiscal Year Ended March 31, 2015
	1st Quarter			2nd Quarter			3rd Quarter		4th Quarter			Total Year
	(in $000’s)
Total revenues	$	48,811		$	51,938		$	62,005	$	67,557		$	230,311
Cost of product revenue		9,689			9,612			9,838		10,806			39,945
Other operating expenses		40,660			38,148			38,504		44,388			161,700
Other income (expense), net		55			(3	)		38		9			99
Income (loss) before income taxes		(1,483	)		4,175			13,701		12,372			28,765
Income tax (benefit) provision(1)		226			336			1,017		(86,502	)		(84,923	)
Net income (loss)	$	(1,709	)	$	3,839		$	12,684	$	98,874		$	113,688
Basic net income (loss) per share	$	(0.04	)	$	0.09		$	0.31	$	2.40		$	2.80
Diluted net income (loss) per share	$	(0.04	)	$	0.09		$	0.30	$	2.24		$	2.65

	Fiscal Year Ended March 31, 2014
	1st Quarter			2nd Quarter		3rd Quarter		4th Quarter		Total Year
	(in $000’s)
Total revenues	$	42,670		$	44,345	$	46,195	$	50,433	$	183,643
Cost of product revenue		8,723			9,027		9,458		10,114		37,322
Other operating expenses		35,254			33,920		32,143		36,641		137,958
Other income (expense), net		(5	)		31		57		84		167
Income (loss) before income tax provision		(1,312	)		1,429		4,651		3,762		8,530
Income tax provision		411			370		258		140		1,179
Net income (loss)	$	(1,723	)	$	1,059	$	4,393	$	3,622	$	7,351
Basic net income (loss) per share	$	(0.04	)	$	0.03	$	0.11	$	0.09	$	0.19
Diluted net income (loss) per share	$	(0.04	)	$	0.03	$	0.11	$	0.09	$	0.18

(1) Net income for the quarter and year ended March 31, 2015 included an income tax benefit of $84.9 million, primarily due to the release of the valuation allowance on certain deferred tax assets in the quarter ended March 31, 2015.

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Summary of Significant Accounting Policies (Policies)

12 Months Ended

Mar. 31, 2015

Principles of Consolidation

Principles of Consolidation

The accompanying consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation.

Use of Estimates

Use of Estimates

The preparation of financial statements in conformity with generally accepted accounting principles of the United States of America, or GAAP, requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. The Company bases its estimates on historical experience and various other factors believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying value of assets and liabilities that are not readily apparent from other sources. On an ongoing basis, the Company evaluates its estimates, including those related to revenue recognition, collectability of receivables, realizability of inventory, goodwill, intangible and long-lived assets, accrued expenses, stock-based compensation, income taxes including deferred tax assets and liabilities, contingencies and litigation. Provisions for depreciation are based on their estimated useful lives using the straight-line method. Some of these estimates can be subjective and complex and, consequently, actual results may differ from these estimates under different assumptions or conditions.

Cash Equivalents and Marketable Securities

Cash Equivalents and Marketable Securities

The Company classifies any marketable security with a maturity date of 90 days or less at the time of purchase as a cash equivalent. Cash equivalents are carried on the balance sheet at fair market value.

The Company classifies any security with a maturity date of greater than 90 days at the time of purchase as marketable securities and classifies marketable securities with a maturity date of greater than one year from the balance sheet date as long-term marketable securities. Securities that the Company has the positive intent and ability to hold to maturity are reported at amortized cost and classified as held-to-maturity securities. If the Company does not have the intent and ability to hold a security to maturity, it reports the investment as available-for-sale securities. The Company reports available-for-sale securities at fair value, and includes unrealized gains and, to the extent deemed temporary, unrealized losses in stockholders’ equity. If any adjustment to fair value reflects a decline in the value of the investment, the Company considers available evidence to evaluate whether the decline is “other than temporary” and, if so, marks the security to market through a charge to unrealized loss on short-term marketable securities in the consolidated statements of operations.

Major Customers and Concentrations of Credit Risk

Major Customers and Concentrations of Credit Risk

The Company primarily sells its products to hospitals and distributors. No customer accounted for more than 10% of total product revenues in fiscal year 2015, 2014 or 2013. No customer had an accounts receivable balance greater than 10% of total accounts receivable at March 31, 2015 and 2014.

Credit is extended based on an evaluation of a customer’s financial condition and generally collateral is not required. To date, credit losses have not been significant and the Company maintains an allowance for doubtful accounts based on its assessment of the collectability of accounts receivable. Receivables are geographically dispersed, primarily throughout the U.S., as well as in Europe and other foreign countries where formal distributor agreements exist.

Financial instruments which potentially subject the Company to a concentration of credit risk consist of cash, cash equivalents, short and long-term marketable securities and accounts receivable. Management mitigates credit risk by limiting the investment type and maturity to securities that preserve capital, maintain liquidity and have a high credit quality.

Financial Instruments

Financial Instruments

The Company’s financial instruments are comprised of cash and cash equivalents, marketable securities, accounts receivable, accounts payable and accrued expenses, the carrying amounts of which approximate fair market value as they are highly liquid and primarily short term in nature.

Inventories

Inventories

Inventories are stated at the lower of cost or market. Cost is based on the first in, first out method. The Company regularly reviews inventory quantities on hand and writes down to its net realizable value any inventory that it believes to be impaired. Management considers forecast demand in relation to the inventory on hand, competitiveness of product offerings, market conditions and product life cycles when determining excess and obsolescence and net realizable value adjustments. Once inventory is written down and a new cost basis is established, it is not written back up if demand increases.

Property and Equipment

Property and Equipment

Property and equipment is recorded at cost less accumulated depreciation. Depreciation is computed using the straight line method based on estimated useful lives of three to five years for machinery and equipment, computer software, and furniture and fixtures. Leasehold improvements are amortized using the straight-line method over the shorter of the lease term or the estimated useful lives of the related assets. Expenditures for maintenance and repairs are expensed as incurred. Upon retirement or other disposition of assets, the costs and related accumulated depreciation are eliminated from the accounts and the resulting gain or loss is reflected in operating expenses.

Property and equipment is reviewed for impairment losses whenever events or changes in circumstances indicate the carrying amount may not be recoverable. An impairment loss would be recognized based on the amount by which the carrying value of the asset or asset group exceeds its fair value. Fair value is determined primarily using the estimated future cash flows associated with the asset or asset group under review discounted at a rate commensurate with the risk involved and other valuation techniques.

Goodwill

Goodwill

Goodwill is recorded when consideration for an acquisition exceeds the fair value of the net tangible and intangible assets acquired. Goodwill is not amortized, instead the Company evaluates goodwill for impairment at least annually at October 31, as well as whenever events or changes in circumstances suggest that the carrying amount may not be recoverable.

Goodwill impairment assessments are performed at the reporting unit level. The goodwill test involves a two-step process. The first step is a comparison of the reporting unit’s fair value to its carrying value. If the reporting unit’s fair value exceeds its carrying value, no further procedures are required. However, if the reporting unit’s fair value is less than the carrying value, an impairment of goodwill may exist, requiring a second step to measure the amount of impairment loss. If the implied fair value of goodwill is less than the recorded goodwill, an impairment charge is recorded for the difference.

In applying the goodwill impairment test, the Company may assess qualitative factors to determine whether it is more likely than not that the fair value of the reporting unit is less than its carrying value (“Step 0”). Qualitative factors may include, but are not limited to, macroeconomic conditions, industry conditions, the competitive environment, changes in the market for our products and services, regulatory and political developments, cost factors, and entity specific factors such as strategies and overall financial performance. If, after assessing these qualitative factors, the Company determines it is not more likely than not that the fair value of a reporting unit is less than its carry amount, then performing the two-step impairment test is unnecessary.

When necessary, the goodwill impairment test is performed at the reporting unit level by comparing the reporting unit’s carrying amount, including goodwill, to the fair value of the reporting unit. The Company estimates the fair value of its single reporting unit using a combination of the income approach and the market approach. The income approach incorporates the use of a discounted cash flow method in which the estimated future cash flows and terminal values for the reporting unit is discounted to a present value using an appropriate discount rate. Cash flow projections are based on management’s estimates of economic and market conditions which drive key assumptions of revenue growth rates, operating margins, capital expenditures and working capital requirements. The discount rate is based on the specific risk characteristics of the reporting unit and its underlying forecast. The market approach estimates fair value by comparing publicly traded companies with similar operating and investment characteristics as the reporting unit. The fair values determined by the market approach and income approach, are weighted to determine the fair value for the reporting unit based primarily on the similarity of the operating and investment characteristics of the reporting unit to the comparable publicly traded companies used in the market approach. In order to assess the reasonableness of the calculated reporting unit’s fair value, the Company also compares the reporting unit’s fair value to its market capitalization (per share stock price times number of common shares outstanding) and calculate an implied control premium (the excess of the reporting unit’s fair value over the market capitalization).

If the carrying amount of the reporting unit exceeds its fair value, then a second step is performed to measure the amount of impairment loss, if any, by comparing the fair value of each identifiable asset and liability in the reporting unit to the total fair value of the reporting unit. Any impairment loss is expensed in the consolidated statement of operations and is not reversed if the fair value subsequently increases.

In-Process Research and Development

In-Process Research and Development

In-process research and development, or IPR&D, assets are considered to be indefinite-lived until the completion or abandonment of the associated research and development projects. IPR&D assets represent the fair value assigned to technologies that are acquired, which at the time of acquisition have not reached technological feasibility and have no alternative future use. During the period that the IPR&D assets are considered indefinite-lived, they are tested for impairment on an annual basis, or more frequently if the Company becomes aware of any events occurring or changes in circumstances that indicate that the fair value of the IPR&D assets are less than their carrying amounts. If and when development is complete, which generally occurs upon regulatory approval and are able to commercialize products associated with the IPR&D assets, these assets are then deemed definite-lived and are amortized based on their estimated useful lives at that point in time. If development is terminated or abandoned, the Company may have a full or partial impairment charge related to the IPR&D assets, calculated as the excess of carrying value of the IPR&D assets over fair value.

Contingent Consideration

Contingent Consideration

Contingent consideration is recorded as a liability and is the estimate of the fair value of potential milestone payments related to business acquisitions. Contingent consideration is measured at fair value using a discounted cash flow model utilizing significant unobservable inputs including the probability of achieving each of the potential milestones and an estimated discount rate associated with the risks of the expected cash flows attributable to the various milestones. Significant increases or decreases in any of the probabilities of success or changes in expected timelines for achievement of any of these milestones would result in a significantly higher or lower fair value of these milestones, respectively, and commensurate changes to the associated liability. The fair value of the contingent consideration at each reporting date is updated by reflecting the changes in fair value reflected within research and development expenses in our statement of operations.

Accrued Expenses

Accrued Expenses

As part of the process of preparing its financial statements, the Company is required to estimate accrued expenses. This process involves identifying services that third parties have performed and estimating the level of service performed and the associated cost incurred on these services as of each balance sheet date in its financial statements. Examples of estimated accrued expenses include contract service fees, such as amounts due to clinical research organizations, investigators in conjunction with clinical trials, professional service fees, such as attorneys and accountants, and third party expenses relating to marketing efforts associated with commercialization of the Company’s product and product candidates. Accrued expenses also include estimates for payroll costs, such as bonuses and commissions. In the event that the Company does not identify certain costs that have been incurred or it under or over-estimates the level of services or the costs of such services, reported expenses for a reporting period could be overstated or understated. The date in which certain services commence, the level of services performed on or before a given date and the cost of services is often subject to the Company’s judgment. The Company makes these judgments and estimates based upon known facts and circumstances.

Revenue Recognition

Revenue Recognition

The Company recognizes revenue when evidence of an arrangement exists, title has passed (generally upon shipment) or services have been rendered, the selling price is fixed or determinable and collectability is reasonably assured.

Revenue from product sales to customers is recognized when delivery has occurred. All costs related to product sales are recognized at time of delivery. The Company does not provide for rights of return to customers on product sales and therefore does not record a provision for returns.

Maintenance and service support contract revenues are included in product sales and are recognized ratably over the term of the service contracts. Revenue is recognized as earned in limited instances where the Company rents its console medical devices on a month-to-month basis or for a longer specified period of time to customers.

Government-sponsored research and development contracts and grants generally provide for payment on a cost-plus-fixed-fee basis. Revenues from these contracts and grants are recognized as work is performed, provided the government has appropriated sufficient funds for the work. Under contracts in which the Company elects to spend significantly more on the development project during the term of the contract than the total contract amount, the Company prospectively recognizes revenue on such contracts ratably over the term of the contract as related research and development costs are incurred.

Product Warranty

Product Warranty

The Company generally provides a one-year warranty for certain products sold in which estimated contractual warranty obligations are recorded as an expense at the time of shipment and are included in accrued expenses in the accompanying consolidated balance sheets. The Company’s products are subject to regulatory and quality standards. Future warranty costs are estimated based on historical product performance rates and related costs to repair given products. The accounting estimate related to product warranty involves judgment in determining future estimated warranty costs. Should actual performance rates or repair costs differ from estimates, revisions to the estimated warranty liability would be required.

Translation of Foreign Currencies

Translation of Foreign Currencies

The functional currency of the Company’s foreign subsidiaries is their local currency. The assets and liabilities of the Company’s foreign subsidiaries are translated into U.S. dollars at exchange rates in effect at the balance sheet date. Income and expense items are translated at the average exchange rates prevailing during the period. The cumulative translation effect for subsidiaries using a functional currency other than the U.S. dollar is included in accumulated other comprehensive income or loss as a separate component of stockholders’ equity.

The Company’s intercompany accounts are denominated in the functional currency of the foreign subsidiary. Gains and losses resulting from the remeasurement of intercompany receivables that the Company considers to be of a long-term investment nature are recorded as a cumulative translation adjustment in accumulated other comprehensive income or loss as a separate component of stockholders’ equity, while gains and losses resulting from the remeasurement of intercompany receivables from those foreign subsidiaries for which the Company anticipates settlement in the foreseeable future are recorded in the consolidated statement of operations. The net gains and losses recorded in the consolidated statements of operations for the years ended March 31, 2015, 2014 and 2013 were not significant.

Net Income Per Share

Net Income Per Share

Basic net income per share is computed by dividing net income by the weighted average number of common shares outstanding during the fiscal year. Diluted net income per share is computed using the treasury stock method by dividing net income by the weighted average number of dilutive common shares outstanding during the fiscal year. Diluted shares outstanding is calculated by adding to the weighted average shares outstanding any potential dilutive securities outstanding for the fiscal year. Potential dilutive securities include stock options, restricted stock awards, restricted stock units, performance-based awards and shares to be purchased under the employee stock purchase plan. In fiscal years when a net loss is reported, all common stock equivalents are excluded from the calculation because they would have an anti-dilutive effect, meaning the loss per share would be reduced. Therefore, in periods when a loss is reported basic and dilutive loss per share are the same.

	March 31,
	2015		2014		2013
Basic Net Income Per Share
Net income	$	113,688	$	7,351	$	15,014
Weighted average shares used in computing basic net income per share		40,632		39,334		39,113
Net income per share—basic	$	2.80	$	0.19	$	0.38

	March 31,
	2015		2014		2013
Diluted Net Income Per Share
Net income	$	113,688	$	7,351	$	15,014
Weighted average shares used in computing basic net income per share		40,632		39,334		39,113
Effect of dilutive securities		2,226		2,272		1,939
Weighted average shares used in computing diluted net income per share		42,858		41,606		41,052
Net income per share—diluted	$	2.65	$	0.18	$	0.37

For the fiscal years ended March 31, 2015, 2014 and 2013, approximately 2,000, 94,000 and 438,000 shares of common stock underlying outstanding securities primarily related to out-of-the-money stock options and performance-based awards where milestones were not met were not included in the computation of diluted earnings per share because their inclusion would be anti-dilutive.

Stock-Based Compensation

Stock-Based Compensation

The Company’s stock-based compensation cost is measured at the grant date based on the fair value of the award and is recognized as an expense over the requisite service period, and includes an estimate of awards that will be forfeited.

The fair value of stock option grants is estimated using the Black-Scholes option pricing model. Use of the valuation model requires management to make certain assumptions with respect to selected model inputs. The risk-free interest rate is based on the U.S. Treasury yield curve in effect at the time of grant for a term consistent with the expected life of the stock options. Volatility assumptions are calculated based on historical volatility of the Company’s stock. The Company estimates the expected term of options based on historical exercise experience and estimates of future exercises of unexercised options. In addition, an expected dividend yield of zero is used in the option valuation model because the Company does not pay dividends and does not expect to pay any cash dividends in the foreseeable future. Forfeitures are estimated based on an analysis of actual option forfeitures, adjusted to the extent historical forfeitures may not be indicative of forfeitures in the future.

For awards with service conditions only, the Company recognizes compensation cost on a straight-line basis over the requisite service period. For awards with service and performance conditions, the Company recognizes compensation costs using the graded vesting method over the requisite service period. Accruals of compensation cost for an award with performance conditions are based on the probable outcome of the performance conditions. The cumulative effect of changes in the probability outcomes are recorded in the period in which the changes occur.

Income Taxes

Income Taxes

The Company’s provision for income taxes is comprised of a current and a deferred provision. The current income tax provision is calculated as the estimated taxes payable or refundable on tax returns for the current fiscal year. The deferred income tax provision is calculated for the estimated future income tax effects attributable to temporary differences and carryforwards using expected tax rates in effect in the years during which the differences are expected to reverse.

Deferred income taxes are recognized for the tax consequences in future years of differences between the tax bases of assets and liabilities and their financial reporting amounts at each fiscal year end based on enacted tax laws and statutory tax rates applicable to the periods in which the differences are expected to impact taxable income.

The Company regularly assesses its ability to realize its deferred tax assets. Assessing the realization of deferred tax assets requires significant management judgment. Valuation allowances are established when necessary to reduce net deferred tax assets to the amount that is more likely than not to be realized.

The Company recognizes and measures uncertain tax positions using a two-step approach. The first step is to evaluate the tax position for recognition by determining if, based on the technical merits, it is more likely than not that the position will be sustained upon audit, including resolution of related appeals or litigation processes, if any. The second step is to measure the tax benefit at the largest amount that is more than 50% likely of being realized upon ultimate settlement. The Company reevaluates these uncertain tax positions on a quarterly basis. This evaluation is based on factors including, but not limited to, changes in facts or circumstances, changes in tax laws, effectively settled issues under audit and new audit activity. Any changes in these factors could result in the recognition of a tax benefit or an additional charge to the tax provision. When applicable, the Company accrues for the effects of uncertain tax positions and the related potential penalties and interest through income tax expense. As of March 31, 2015, the Company has no material uncertain tax positions and no interest and penalties have been recognized to date.

Recent Accounting Pronouncements

Recent Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-09, Revenue from Contracts with Customers to provide updated guidance on revenue recognition. ASU 2014-09 requires a company to recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. In doing so, companies may need to use more judgment and make more estimates than under today’s guidance. These may include identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. This standard was initially released as effective for fiscal years beginning after December 15, 2016; however, the FASB has tentatively decided to defer the effective date of ASU 2014-09 for one year. The new guidelines can be implemented using either of the following transition methods: (i) a full retrospective approach reflecting the application of the standard in each prior reporting period with the option to elect certain practical expedients, or (ii) a retrospective approach with the cumulative effect of initially adopting ASU 2014-09 recognized at the date of adoption. The Company is currently evaluating the impact of this ASU on its consolidated financial statements and has not yet determined the method by which it will adopt the standard.

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Changes in Valuation Allowance for Deferred Tax Assets (Detail) (Valuation Allowance of Deferred Tax Assets, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Valuation Allowance of Deferred Tax Assets
Valuation Allowance [Line Items]
Balance at Beginning of Period	$ 102,093	$ 106,670
Decreases recorded as benefit to income tax provision	(101,468)	(4,577)
Increases due to foreign net operating loss in certain foreign jurisdictions	2,287
Balance at End of Period	$ 2,912	$ 102,093

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Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Operating activities:
Net income	$ 113,688	$ 7,351	$ 15,014
Adjustments required to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	2,770	2,508	2,723
Bad debt expense	(5)	47	33
Stock-based compensation	16,520	11,218	9,501
Write-down of inventory	2,231	2,012	1,172
Excess tax benefit from stock-based awards	(606)
Loss on disposal of fixed assets			10
Deferred tax (benefit) provision	(87,094)	860	755
Change in fair value of contingent consideration	510
Changes in assets and liabilities:
Accounts receivable	(7,970)	(1,312)	(2,586)
Inventories	(6,967)	(622)	(5,315)
Prepaid expenses and other assets	(1,479)	(1,039)	(326)
Accounts payable	3,372	(54)	1,183
Accrued expenses and other long-term liabilities	6,011	1,938	3,057
Deferred revenue	2,309	559	1,178
Net cash provided by operating activities	43,290	23,466	26,399
Investing activities:
Purchases of marketable securities	(97,658)	(87,026)	(49,429)
Proceeds from the sale and maturity of marketable securities	71,530	68,265	42,000
Payments for acquisitions, net of cash assumed	(15,697)
Purchase of other investments	(2,850)	(750)
Purchases of property and equipment	(5,188)	(2,761)	(2,836)
Net cash used for investing activities	(49,863)	(22,272)	(10,265)
Financing activities:
Proceeds from the exercise of stock options	10,927	9,360	2,936
Excess tax benefit from stock-based awards	606
Repurchase of common stock			(15,045)
Taxes paid related to net share settlement of vesting of stock awards	(2,805)	(425)	(257)
Proceeds from the issuance of stock under employee stock purchase plan	795	697	555
Net cash provided by (used for) financing activities	9,523	9,632	(11,811)
Effect of exchange rate changes on cash	(1,465)	639	(862)
Net increase in cash and cash equivalents	1,485	11,465	3,461
Cash and cash equivalents at beginning of year	20,916	9,451	5,990
Cash and cash equivalents at end of year	22,401	20,916	9,451
Supplemental disclosure of cash flow information:
Cash paid for income taxes	1,215	1,324	131
Supplemental disclosure of non-cash investing and financing activities:
Contingent consideration related to acquisition of ECP	6,000
Fixed asset expenditures incurred, not yet paid	$ 193	$ 60	$ 250

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Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2015	Mar. 31, 2014
Class B Preferred Stock, par value	$ 0.01	$ 0.01
Class B Preferred Stock, Authorized	1,000,000	1,000,000
Class B Preferred Stock, Issued	0	0
Class B Preferred Stock, outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, Authorized	100,000,000	100,000,000
Common stock, Issued	42,618,717	41,122,695
Common stock, Outstanding	41,335,773	39,916,328
Treasury stock, shares	1,282,944	1,206,367

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Stock Award Plans and Stock-Based Compensation

12 Months Ended

Mar. 31, 2015

Stock Award Plans and Stock-Based Compensation

Note 10. Stock Award Plans and Stock-Based Compensation

Stock Award Plans

The Company grants stock options and restricted stock awards to employees and others. All outstanding stock options of the Company as of March 31, 2015 were granted with an exercise price equal to the fair market value on the date of grant. Outstanding stock options, if not exercised, expire 10 years from the date of grant.

The Company’s 2008 Stock Incentive Plan (the “Plan”) authorizes the grant of a variety of equity awards to the Company’s officers, directors, employees, consultants and advisers, including awards of unrestricted and restricted stock, restricted stock units, incentive and nonqualified stock options to purchase shares of common stock, performance share awards and stock appreciation rights. The Plan provides that options may only be granted at the current market value on the date of grant. Each share of stock issued pursuant to a stock option or stock appreciation right counts as one share against the maximum number of shares issuable under the Plan, while each share of stock issued pursuant to any other type of award counts as 1.58 shares against the maximum number of shares issuable under the Plan for grants made on or after August 11, 2010 (and as 1.5 shares for grants made prior to that date). The Company’s policy for issuing shares upon exercise of stock options or the vesting of its restricted stock awards and restricted stock units is to issue shares of common stock at the time of exercise or conversion. At March 31, 2015, a total of approximately 1,841,000 shares were available for future issuance under the Plan.

Stock-Based Compensation

The following table summarizes stock-based compensation expense by financial statement line item in the Company’s consolidated statements of operations for the fiscal years ended March 31, 2015, 2014 and 2013 (in thousands):

	March 31,
	2015		2014		2013
	(in $000’s)
Cost of product revenue	$	665	$	614	$	450
Research and development		3,205		2,347		1,843
Selling, general and administrative		12,650		8,257		7,208
	$	16,520	$	11,218	$	9,501

The components of stock-based compensation for the fiscal years ended March 31, 2015, 2014 and 2013 were as follows (in thousands):

	March 31,
	2015		2014		2013
	(in $000’s)
Restricted stock units	$	13,524	$	8,008	$	5,970
Stock options		2,708		2,679		2,680
Restricted stock		15		314		653
Employee stock purchase plan		273		217		198
	$	16,520	$	11,218	$	9,501

Stock Options

The following table summarized stock option activity for the year ended March 31, 2015:

	Options (in thousands)			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (years)		Aggregate Intrinsic Value (in thousands)
Outstanding at beginning of year		3,492		$	13.27		4.92
Granted		322			22.83
Exercised		(911	)		11.99
Cancelled and expired		(11	)		18.34
Outstanding at end of year		2,892		$	14.72		5.18	$	164,439
Exercisable at end of year		2,150		$	11.95		4.08	$	128,200
Options vested and expected to vest at end of year		2,827		$	14.52		5.11	$	161,304

The remaining unrecognized stock-based compensation expense for unvested stock option awards at March 31, 2015 was approximately $4.6 million, net of forfeitures, and the weighted-average period over which this cost will be recognized is 2.1 years.

The aggregate intrinsic value of options exercised for fiscal years 2015, 2014 and 2013 was $20.0 million, $16.3 million and $4.6 million, respectively. The total cash received as a result of employee stock option exercises during the years ended March 31, 2015, 2014 and 2013 was approximately $10.9 million, $9.4 million and $2.9 million, respectively. The total fair value of options vested in fiscal years 2015, 2014 and 2013 was $2.6 million, $2.5 million and $2.6 million, respectively.

The weighted average grant-date fair value for options granted during the years ended March 31, 2015, 2014 and 2013 was $9.29, $9.85 and $9.66 per share, respectively.

The Company estimates the fair value of each stock option granted at the grant date using the Black-Scholes option valuation model. The fair value of options granted during the years ended March 31, 2015, 2014 and 2013 were calculated using the following weighted average assumptions:

	2015			2014			2013
Risk-free interest rate		1.60	%		0.94	%		0.78	%
Expected option life (years)		4.19			4.25			4.31
Expected volatility		49.3	%		51.7	%		56.2	%

The risk-free interest rate is based on the U.S. Treasury yield curve in effect at the time of grant for a term consistent with the expected life of the stock options. Volatility assumptions are calculated based on the historical volatility of the Company’s stock and adjustments for factors not reflected in historical volatility that may be more indicative of future volatility. The Company estimates the expected term of options based on historical exercise experience and estimates of future exercises of unexercised options. An expected dividend yield of zero is used in the option valuation model because the Company does not pay cash dividends and does not expect to pay any cash dividends in the foreseeable future. The Company estimates forfeitures based on an analysis of actual historical forfeitures, adjusted to the extent historic forfeitures may not be indicative of forfeitures in the future.

Restricted Stock and Restricted Stock Units

The following table summarizes restricted stock and restricted stock unit activity for the fiscal year ended March 31, 2015:

	Number of Shares (in thousands)			Weighted Average Grant Date Fair Value (per share)
Restricted stock and restricted stock units at beginning of year		1,174		$	21.37
Granted		674			22.07
Vested		(543	)		20.67
Forfeited		(145	)		22.95
Restricted stock and restricted stock units at end of year		1,160		$	21.90

The remaining unrecognized compensation expense for outstanding restricted stock and restricted stock units, including performance-based awards, as of March 31, 2015 was $10.9 million and the weighted-average period over which this cost will be recognized is 1.7 years.

The weighted average grant-date fair value for restricted stock and restricted stock units granted during the years ended March 31, 2015, 2014 and 2013 was $22.07, $23.34 and $21.82 per share, respectively. The total fair value of restricted stock and restricted stock units vested in fiscal years 2015, 2014 and 2013 was $11.2 million, $6.0 million and $3.0 million, respectively.

Performance-Based Awards

Included in the restricted stock and restricted stock units activity discussed above are certain awards that vest subject to certain performance-based criteria.

In May 2014, performance-based awards of restricted stock units for the potential issuance of 379,752 shares of common stock were issued to certain executive officers and employees, all of which vest upon achievement of prescribed service milestones by the award recipients and performance milestones by the Company. The Company met the prescribed performance milestones in fiscal 2015 such that the remaining outstanding 373,938 shares of common stock as of March 31, 2015 will vest subject to service requirements for vesting for these employees and the compensation expense is being recognized accordingly over the remaining service term.

In March 2014, the Company modified the performance condition on 50,000 restricted stock units originally granted in June 2011. As of March 31, 2015, the Company believes that it is probable that the prescribed performance milestones will be met and the compensation expense is being recognized accordingly.

In May 2013, performance-based awards of restricted stock units for the potential issuance of 268,988 shares of common stock were issued to certain executive officers and employees, all of which vest upon achievement of prescribed service milestones by the award recipients and performance milestones by the Company. The Company met the prescribed performance milestones in fiscal 2014 such that the remaining outstanding 149,265 shares of common stock as of March 31, 2015 will vest subject to service requirements for vesting for these employees and the compensation expense is being recognized accordingly over the remaining service term.

In May 2012, performance-based awards of restricted stock units for the potential issuance of 195,188 shares of common stock were issued to certain executive officers and employees of the Company, all of which will vest upon achievement of prescribed service milestones by the award recipients and performance milestones by the Company. The Company met the prescribed performance milestones in fiscal 2013 such that the remaining outstanding shares of common stock as of March 31, 2015 will vest subject to service requirements for vesting for these employees and the compensation expense is being recognized accordingly over the remaining service term.

During the year ended March 31, 2015, the Company has recorded $8.0 million in stock-based compensation expense for equity awards in which the prescribed performance milestones have been achieved or are probable of being achieved. The remaining unrecognized compensation expense related to these equity awards at March 31, 2015 is $4.3 million based on the Company’s current assessment of probability of achieving the performance milestones. The weighted-average period over which this cost will be recognized is 1.5 years.

Employee Stock Purchase Plan

The Company has an employee stock purchase plan, or ESPP. Under the ESPP, eligible employees, including officers and directors, who have completed at least three months of employment with the Company or its subsidiaries who elect to participate in the purchase plan instruct the Company to withhold a specified amount of the employee’s income each payroll period during a six-month payment period (the periods April 1—September 30 and October 1—March 31). On the last business day of each six-month payment period, the amount withheld is used to purchase shares of the Company’s common stock at an exercise price equal to 85% of the lower of its market price on the first business day or the last business day of the payment period. The Company recognized compensation expense of $0.3 million, $0.2 million and $0.2 million for the fiscal years ended March 31, 2015, 2014 and 2013, respectively, related to the ESPP.

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Document and Entity Information (USD $)	12 Months Ended
	Mar. 31, 2015	May 12, 2015	Sep. 30, 2014
Document Information [Line Items]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Mar. 31, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	FY
Trading Symbol	ABMD
Entity Registrant Name	ABIOMED INC
Entity Central Index Key	0000815094
Current Fiscal Year End Date	--03-31
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		41,737,054
Entity Public Float			$ 1,007,530,237

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Income Taxes

12 Months Ended

Mar. 31, 2015

Income Taxes

Note 11. Income Taxes

The components of the Company’s income tax benefit (provision) for the years ended March 31, 2015, 2014 and 2013 are as follows:

	2015			2014			2013
	(in $000’s)
Income before income taxes:
United States	$	22,243		$	4,267		$	10,202
Foreign		6,522			4,263			6,660
Income before income taxes	$	28,765		$	8,530		$	16,862
Current tax expense (benefit):
Federal	$	464		$	(100	)	$	97
State		424			(106	)		—
Foreign		1,283			525			996
		2,171			319			1,093
Deferred tax (benefit) expense:
Federal		(66,140	)		825			825
State		(13,430	)		35			(70	)
Foreign		(7,524	)		—			—
		(87,094	)		860			755
Total income tax (benefit) provision	$	(84,923	)	$	1,179		$	1,848

The components of the Company’s net deferred taxes were as follows:

	March 31,
	2015			2014
	(in $000’s)
Deferred tax assets
NOL carryforwards and tax credit carryforwards	$	60,081		$	72,430
Stock-based compensation		10,568			10,519
Nondeductible reserves and accruals		7,573			6,775
Amortizable intangibles other than goodwill		2,993			3,470
Capitalized research and development		1,597			3,208
Foreign NOL carryforwards		19,617			2,705
Deferred revenue		2,669			1,767
Depreciation		276			561
Other, net		1,298			658
		106,672			102,093
Deferred tax liabilities
Indefinite lived intangibles		(7,530	)		(6,415	)
In-process research and development		(4,443	)		—
Domestic deferred tax liability on foreign NOL carryforwards		(12,276	)		—
		(24,249	)		(6,415	)
Net deferred tax assets		82,423			95,678
Valuation allowance		(2,912	)		(102,093	)
Net deferred tax assets	$	79,511		$	(6,415	)
Reported as:
Current deferred tax assets, net	$	35,100		$	—
Long-term deferred tax assets, net		45,206			—
Long-term deferred tax liabilities		(795	)		(6,415	)
Net deferred tax assets	$	79,511		$	(6,415	)

A reconciliation of the federal statutory income tax rate to the Company’s effective income tax rate is as follows for the years ended March 31, 2015, 2014, and 2013:

	2015			2014			2013
Statutory income tax rate		35.0	%		34.0	%		34.0	%
(Decrease) increase resulting from:
Change in valuation allowance		(342.8	)		(53.7	)		(11.5	)
Credits		(1.9	)		(20.1	)		(17.0	)
Foreign taxes		4.5			—			—
State taxes, net		4.0			12.9			(6.9	)
Permanent differences		3.9			0.4			—
Stock based compensation		0.3			0.9			0.4
Rate differential on foreign operations		0.2			31.1			9.7
Expiry of state NOL carryforwards		—			—			2.1
Other		1.6			8.4			0.2
Effective tax rate		(295.2	)%		13.9	%		11.0	%

The Company classifies its deferred tax assets and liabilities as current or non-current based on the classification of the related asset or liability for financial reporting giving rise to the temporary difference. A deferred tax asset that is not related to an asset or liability for financial reporting, including deferred tax assets related to net operating loss (“NOL”) carryforwards, is classified in current or long-term according to the expected reversal date.

The Company regularly assesses its ability to realize its deferred tax assets. Assessing the realization of deferred tax assets requires significant management judgment. In determining whether its deferred tax assets are more likely than not realizable, the Company evaluated all available positive and negative evidence, and weighted the evidence based on its objectivity. Prior to March 31, 2015, the Company had determined that the objectively verifiable negative evidence outweighed the positive evidence due to its history of net operating losses incurred for most of its existence, the then-pending status of the Company’s Pre-Market Approval (“PMA”) application with the U.S. Food and Drug Administration (“FDA”) for its Impella 2.5 product in the U.S., among other factors, and as a result it recorded a full valuation allowance against its deferred tax assets.

During the quarter ended March 31, 2015, the Company determined based on its consideration of the weight of positive and negative evidence that there was sufficient positive evidence that most of its federal, state and certain foreign deferred tax assets are more likely than not recoverable as of March 31, 2015. The Company’s conclusion was primarily driven by the Company’s receipt of PMA approval for its Impella 2.5 product in March 2015, the $28.8 million of income before taxes in fiscal 2015, its history of profits in recent years and its expectation for sustainable future profitability now that it has obtained PMA approval for Impella 2.5. Accordingly, the Company recorded a $101.5 million reversal of the valuation allowance in the quarter ended March 31, 2015, primarily related to the Company expecting to be able to use NOL carryforwards in the future in the U.S. and Germany.

As of March 31, 2015, the remaining $2.9 million valuation allowance represents deferred tax assets related to NOL carryforwards in certain foreign jurisdictions in which the Company has had limited history of profitability. Based on the review of all available evidence, the Company recorded a valuation allowance to reduce these deferred tax assets to the amount that is more likely than not to be realizable as of March 31, 2015.

Changes in the valuation allowance for deferred tax assets during the years ended March 31, 2015 and 2014 were as follows:

	2015			2014
	(in $000’s)
Valuation allowance as of beginning of year	$	102,093		$	106,670
Decreases recorded as benefit to income tax provision		(101,468	)		(4,577	)
Increases due to foreign net operating loss in certain foreign jurisdictions		2,287			—
Valuation allowance as of end of year	$	2,912		$	102,093

At March 31, 2015, the Company had federal and state net operating loss carryforwards, or NOLs, of approximately $175.6 million which expire in varying years from fiscal 2016 through fiscal 2034. During the year ended March 31, 2015, state NOLs of approximately $1.5 million expired. At March 31, 2015, the Company had German NOLs of approximately $32.2 million, which do not expire. In addition, at March 31, 2015, the Company had federal and state research and development credit carryforwards of approximately $11.8 million and $5.2 million, respectively, which expire in varying years from fiscal 2016 through fiscal 2034.

Of the total amount of available U.S. federal NOLs, $63.0 million relates to stock-based compensation tax deductions in excess of stock-based compensation expense for financial reporting purposes (“excess tax benefits”). Excess tax benefits are realized when they reduce income taxes payable, as determined using a “with and without” method, and are credited to additional paid-in capital rather than as a reduction of the income tax provision. During the year ended March 31, 2015, the Company realized excess tax benefits from state tax deductions of $0.6 million which were credited to additional paid-in capital.

The Company and its subsidiaries are subject to U.S. federal income tax, as well as income tax of multiple state and foreign jurisdictions. Fiscal years 2012 through 2015 remain open to examination in Germany. All tax years remain subject to examination by the Internal Revenue Service and state tax authorities, because the Company has net operating loss and tax credit carryforwards which may be utilized in future years to offset taxable income, those years may also be subject to review by relevant taxing authorities if the carryforwards are utilized.

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Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Mar. 31, 2015		Mar. 31, 2014	Mar. 31, 2013
Revenue:
Product revenue	$ 229,950		$ 183,280	$ 157,614
Funded research and development	361		363	510
Total Revenue	230,311		183,643	158,124
Costs and expenses:
Cost of product revenue	39,945		37,322	31,596
Research and development	35,973		30,707	25,647
Selling, general and administrative	125,727		107,251	84,227
Amortization of intangible assets				111
Costs and Expenses, Total	201,645		175,280	141,581
Income from operations	28,666		8,363	16,543
Other income:
Investment income (expense), net	196		118	(7)
Other (expense) income, net	(97)		49	326
Other income (expense), net	99		167	319
Income (loss) before income taxes	28,765		8,530	16,862
Income tax (benefit) provision	(84,923)	[1]	1,179	1,848
Net income	$ 113,688		$ 7,351	$ 15,014
Basic net income per share	$ 2.80		$ 0.19	$ 0.38
Basic weighted average shares outstanding	40,632		39,334	39,113
Diluted net income per share	$ 2.65		$ 0.18	$ 0.37
Diluted weighted average shares outstanding	42,858		41,606	41,052

[1] Net income for the quarter and year ended March 31, 2015 included an income tax benefit of $84.9 million, primarily due to the release of the valuation allowance on certain deferred tax assets in the quarter ended March 31, 2015.

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Accounts Receivable

12 Months Ended

Mar. 31, 2015

Accounts Receivable

Note 5. Accounts Receivable

The components of accounts receivable are as follows:

	March 31,
	2015			2014
	(in $000’s)
Trade receivables	$	32,005		$	24,542
Allowance for doubtful accounts		(177	)		(185	)
	$	31,828		$	24,357

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Marketable Securities and Fair Value Measurements

12 Months Ended

Mar. 31, 2015

Marketable Securities and Fair Value Measurements

Note 4. Marketable Securities and Fair Value Measurements

Marketable Securities

The Company’s marketable securities are classified as available-for-sale securities and, accordingly, are recorded at fair value. The difference between amortized cost and fair value is reported as a component of other comprehensive (loss) income.

The Company’s marketable securities at March 31, 2015 and 2014 are classified on the balance sheet as follows (in thousands):

	March 31,
	2015		2014
	(in $000’s)
Short-term marketable securities (within one year to maturity)	$	109,557	$	55,663
Long-term marketable securities (one to five years to maturity)		13,996		41,761
	$	123,553	$	97,424

The Company’s marketable securities at March 31, 2015 and 2014 are invested in the following (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Market Value
	(in $000’s)
At March 31, 2015:
US Treasury mutual fund securities	$	19,487	$	—	$	—		$	19,487
Short-term government-backed securities		90,070		9		(9	)		90,070
Long-term government-backed securities		13,999		2		(5	)		13,996
	$	123,556	$	11	$	(14	)	$	123,553
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Market Value
	(in $000’s)
At March 31, 2014:
US Treasury mutual fund securities	$	31,487	$	—	$	—		$	31,487
Short-term government-backed securities		24,174		6		(4	)		24,176
Long-term government-backed securities		41,779		8		(26	)		41,761
	$	97,440	$	14	$	(30	)	$	97,424

Fair Value Hierarchy

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Financial assets and liabilities carried at fair value are to be classified and disclosed in one of the following three categories:

Level 1: Quoted market prices in active markets for identical assets or liabilities.

Level 2: Observable market based inputs or unobservable inputs that are corroborated by market data.

Level 3: Unobservable inputs that are not corroborated by market data.

Level 1 primarily consists of financial instruments whose value is based on quoted market prices such as exchange-traded instruments and listed equities.

Level 2 includes financial instruments that are valued using models or other valuation methodologies. These models are primarily industry-standard models that consider various assumptions, including time value, yield curve, volatility factors, prepayment speeds, default rates, loss severity, current market and contractual prices for the underlying financial instruments, as well as other relevant economic measures. Substantially all of these assumptions are observable in the marketplace, can be derived from observable data or are supported by observable levels at which transactions are executed in the marketplace.

Level 3 is comprised of unobservable inputs that are supported by little or no market activity. Financial assets are considered Level 3 when their fair values are determined using pricing models, discounted cash flows or similar techniques and at least one significant model assumption or input is unobservable.

The following table presents the Company’s fair value hierarchy for its financial instruments measured at fair value as of March 31, 2015 and 2014:

	Level 1		Level 2		Level 3		Total
	(in $000’s)
At March 31, 2015:
Assets
U.S. Treasury mutual fund securities	$	—	$	19,487	$	—	$	19,487
Short-term government-backed securities		—		90,070		—		90,070
Long-term government-backed securities		—		13,996		—		13,996
Liabilities
Contingent consideration		—		—		6,510		6,510
	Level 1		Level 2		Level 3		Total
	(in$000’s)
At March 31, 2014:
U.S. Treasury mutual fund securities	$	—	$	31,487	$	—	$	31,487
Short-term government-backed securities		—		24,176		—		24,176
Long-term government-backed securities		—		41,761		—		41,761

The Company has determined that the estimated fair value of its investments in U.S. Treasury mutual fund securities, short-term government-backed securities and long-term government-backed securities are reported as Level 2 financial assets as they are not exchange-traded instruments.

The Company’s financial liabilities consisted of contingent consideration potentially payable to former ECP shareholders related to the acquisition of ECP in July 2014. This liability is reported as Level 3 as estimated fair value of the contingent consideration related to the acquisition of the ECP requires significant management judgment or estimation and is calculated using the income approach, using various revenue and cost assumptions and applying a probability to each outcome.

The following table summarizes the change in fair value, as determined by Level 3 inputs, of the contingent consideration for the year ended March 31, 2015:

	March 31, 2015
	(in $000’s)
Beginning balance	$	—
Additions		6,000
Payments		—
Change in fair value		510
Ending balance	$	6,510

The change in fair value of the contingent consideration of $0.5 million for the year ended March 31, 2015 was primarily due to an increase in fair value due to the effect of the passage of time on the fair value measurement of milestones related to the ECP acquisition. Adjustments associated with the change in fair value of contingent consideration are included in research and development expenses on the Company’s consolidated statements of operations.

The following table presents quantitative information about the inputs and valuation methodologies used for the Company’s fair value measurements as of July 1, 2014 and March 31, 2015 classified in Level 3:

	Valuation Methodology	Significant Unobservable Input	Weighted Average (range, if applicable)
Contingent consideration	Probability weighted income approach	Milestone dates	2018 to 2021
		Discount rate	8% to 12%
		Probability of occurrence	Probability adjusted level of 40% for the base case scenario and 5% to 25% for various upside and downside scenarios

Other Investments

In May 2013 and September 2014, the Company invested $0.8 million and $0.7 million in preferred stock of a private medical technology company. There are no additional outstanding funding commitments associated with this investment.

In November 2014, the Company invested $0.5 million in a 0% interest promissory note to a separate private medical technology company that is convertible into preferred stock of the company based upon a qualified financing as defined in the agreement governing the investment. The promissory note was converted into preferred stock on May 19, 2015. There are no additional outstanding funding commitments associated with this investment.

In January 2015, the Company invested $0.6 million in a 5% interest promissory note to another private medical technology company. This promissory note and accrued interest is convertible into preferred stock of the company upon a qualified financing as defined in the agreement governing the investment. The Company could also be required to invest an additional $0.4 million in the form of a promissory note if certain milestones are met.

In March 2015, the Company invested $1.0 million in preferred stock of a private medical technology company. There are no additional outstanding funding commitments associated with this investment.

The Company’s other investments are accounted for using the cost method and are measured at fair value on a nonrecurring basis only if there are identified events or changes in circumstances that may have a significant adverse effect on the fair value of these investments. The aggregate carrying amount of these investments was $3.6 million and $0.8 million at March 31, 2015 and March 31, 2014, respectively, and is classified within other assets in the consolidated balance sheets.

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SCHEDULE II Valuation and Qualifying Accounts

12 Months Ended

Mar. 31, 2015

SCHEDULE II Valuation and Qualifying Accounts

ABIOMED, INC. AND SUBSIDIARIES

SCHEDULE II

Valuation and Qualifying Accounts

(in thousands)

Description	Balance at Beginning of Period		Additions		Deductions		Balance at End of Period
Allowance for Doubtful Accounts
Fiscal Year Ended March 31, 2013	$	230	$	200	$	294	$	136
Fiscal Year Ended March 31, 2014	$	136	$	81	$	32	$	185
Fiscal Year Ended March 31, 2015	$	185	$	115	$	123	$	177

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Commitments and Contingencies

12 Months Ended

Mar. 31, 2015

Commitments and Contingencies

Note 12. Commitments and Contingencies

Commitments

The following is a description of the Company’s significant arrangements in which the Company is a guarantor.

Indemnifications—In many sales transactions, the Company indemnifies customers against possible claims of patent infringement caused by the Company’s products. The indemnifications contained within sales contracts usually do not include limits on the claims. The Company has never incurred any material costs to defend lawsuits or settle patent infringement claims related to sales transactions.

The Company enters into agreements with other companies in the ordinary course of business, typically with underwriters, contractors, clinical sites and customers that include indemnification provisions. Under these provisions the Company generally indemnifies and holds harmless the indemnified party for losses suffered or incurred by the indemnified party as a result of its activities. These indemnification provisions generally survive termination of the underlying agreement. The maximum potential amount of future payments the Company could be required to make under these indemnification provisions is unlimited. The Company has never incurred any material costs to defend lawsuits or settle claims related to these indemnification agreements. As a result, the estimated fair value of these agreements is immaterial. Accordingly, the Company has no liabilities recorded for these agreements as of March 31, 2015.

Clinical study agreements—In the Company’s clinical study agreements, the Company has agreed to indemnify the participating institutions against losses incurred by them for claims related to any personal injury of subjects taking part in the study to the extent they relate to uses of the Company’s devices in accordance with the clinical study agreement, the protocol for the device and the Company’s instructions. The indemnification provisions contained within the Company’s clinical study agreements do not generally include limits on the claims. The Company has never incurred any material costs related to the indemnification provisions contained in its clinical study agreements.

Facilities leases— The Company’s headquarters is located at 22 Cherry Hill Drive in Danvers, Massachusetts and consists of approximately 96,000 square feet of space under an operating lease as of March 31, 2015. On April 30, 2015, the Company entered into an amendment to the lease in which it agreed to lease an additional 24,560 square feet of space. In addition, the Company has certain rights to terminate the lease early, subject to the payment of a specified termination fee based on the timing of the termination, as further outlined in the lease amendment. The amendment also grants the Company a one-time right of first offer to lease new space in the facility and a one-time first right of refusal to buy the facility, subject to certain conditions set forth therein This facility encompasses most of its U.S. operations, including research and development, manufacturing, sales and marketing and general and administrative departments. The monthly lease payments over the term of the lease are as follows:

• The base rent for May 2014 through December 2015 is $74,050 per month; and

• The base rent for January 2016 through February 2016 will be $85,818 per month; and

• The base rent for March 2016 through February 2018 will be $82,518 per month; and

• The base rent for March 2018 through February 2021 will be $85,030 per month.

The Company’s European headquarters is located in Aachen, Germany and consists of approximately 33,000 square feet of space under an operating lease. In July 2013, the Company entered into a lease agreement to continue renting our existing space in Aachen, Germany through July 31, 2023. The lease payments are approximately 34,500€ (euro) (approximately U.S. $37,400 at March 31, 2015 exchange rates) per month. The building houses most of the manufacturing operations for the Impella product line as well as certain research and development functions and the sales, marketing and general and administrative functions for most of its product lines sold in Europe and the Middle East.

Total rent expense for the Company’s operating leases included in the accompanying consolidated statements of operations approximated $1.9 million, $1.5 million and $1.6 million for the fiscal years ended March 31, 2015, 2014 and 2013, respectively.

Future minimum lease payments under non-cancelable operating leases as of March 31, 2015 are approximately as follows:

Fiscal Year Ending March 31,
	(in $000s)
2016	$	1,511
2017		1,528
2018		1,510
2019		1,520
2020		1,520
Thereafter		2,109
Total future minimum lease payments	$	9,698

License agreements—In April 2014, the Company entered into an exclusive license agreement with Opsens, Inc. for the rights to certain optical sensor technologies in the field of cardio-circulatory assist devices. Under the agreement, the Company made a $1.5 million upfront payment upon execution of the agreement and agreed to make additional payments of up to $4.5 million upon achievement of development milestones.

The Company is also party to a license agreement related to certain circulatory care device patents and know-how. Under this agreement, the Company would be obligated to pay up to $3.0 million in cash or stock, if certain development and regulatory milestones are achieved.

Contingencies

From time to time, the Company is involved in legal and administrative proceedings and claims of various types. In some actions, the claimants seek damages, as well as other relief, which, if granted, would require significant expenditures. The Company records a liability in its consolidated financial statements for these matters when a loss is known or considered probable and the amount can be reasonably estimated. The Company reviews these estimates each accounting period as additional information is known and adjusts the loss provision when appropriate. If a matter is both probable to result in liability and the amounts of loss can be reasonably estimated, the Company estimates and discloses the possible loss or range of loss. If the loss is not probable or cannot be reasonably estimated, a liability is not recorded in its consolidated financial statements.

On October 26, 2012, the Company was informed that the Department of Justice, United States Attorney’s Office for the District of Columbia was conducting an investigation, or the “Marketing and Labeling Investigation”, focused on its marketing and labeling of the Impella 2.5. On October 31, 2012, the Company accepted service of a subpoena related to this investigation seeking documents related to the Impella 2.5. The Company believes that it has substantially complied with the subpoena and has submitted the requested documents to the United States Attorney’s Office. On September 13, 2013, the Company entered into a tolling agreement with the United States Attorney’s Office, pursuant to which the Company and the United States Attorney’s Office mutually agreed to toll the applicable statutes of limitations for all criminal, civil and administrative offenses and violations that could be charged or claimed against the Company as of that date. On May 27, 2014 and January 30, 2015, the Company executed extensions of the tolling agreement. These extensions expired on March 2, 2015. The investigation is ongoing and is unable to predict the ultimate outcome or determine whether a liability has been incurred or make an estimate of the reasonably possible liability, if any, that could result from any unfavorable outcome associated with this investigation. The Company has incurred significant expenses related to this investigation and it could continue to incur additional expenses in the future related to this action.

On February 6, 2015, the U.S. Court of Appeals for the First Circuit, or the First Circuit, affirmed the dismissal by the U.S. District Court for the District of Massachusetts, or the District Court, of a previously disclosed complaint brought by alleged purchasers of the Company’s common stock, on behalf of themselves and persons or entities that purchased or acquired common stock of the Company between August 5, 2011 and October 31, 2012. The complaint related to two previously reported complaints that were filed on November 16 and 19, 2012 and alleged that the Company and certain of its officers violated federal securities laws in connection with disclosures related to the Company’s marketing and labeling of the Impella 2.5 product and sought damages in an unspecified amount. The District Court consolidated these complaints, and a consolidated amended complaint was filed by the plaintiffs on May 20, 2013. On July 8, 2013, the defendants filed a motion to dismiss the consolidated class action. The Company does not expect any further activity related to this matter.

On April 25, 2014, the Company received a subpoena from the Boston regional office of the United States Department of Health and Human Services, or HHS, Office of Inspector General requesting materials relevant to the Company’s reimbursement of expenses and remuneration to healthcare providers for a six month period from July 2012 through December 2012 in connection with a civil investigation under the False Claims Act (the “FCA Investigation” and, together with the Marketing and Labeling Investigation, the “DOJ Investigations”). The Company submitted the requested documents to HHS and believes that it substantially complied with the subpoena. On November 6, 2014, the Company received notice from the Department of Justice, United States Attorney’s Office for the District of Massachusetts in the form of a Civil Investigative Demand (“CID”) requesting additional materials relating to this matter for the time period of January 1, 2012 through December 31, 2013. The Company is currently is the process of responding to the additional requests for information contained in the CID and intends to continue to cooperate with the U.S. Attorney’s Office in connection with the FCA investigation.

The Company is unable to estimate a potential liability with respect to the DOJ Investigations. There are numerous factors that make it difficult to meaningfully estimate possible loss or range of loss at this stage of these investigations and lawsuits, including that: the proceedings are in relatively early stages, there are significant factual and legal issues to be resolved and information obtained or rulings made during any lawsuits or investigations could affect the methodology for calculation. In addition, with respect to claims for which damages are the requested relief, no amount of loss or damages has been specified. Therefore, the Company is unable at this time to estimate its possible losses and accordingly, no adjustment has been made to the financial statements to reflect the outcome of these uncertainties.

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Goodwill and In-Process Research and Development

12 Months Ended

Mar. 31, 2015

Goodwill and In-Process Research and Development

Note 8. Goodwill and In-Process Research and Development

The carrying amount of goodwill at March 31, 2015 and 2014 was $31.5 million and $38.0 million, respectively, and has been recorded in connection with the Company’s acquisition of Impella Cardiosystems AG, or Impella, in 2005 and ECP and AIS in July 2014. The goodwill activity is as follows:

	March 31, 2015
	(in $000’s)
Balance at March 31, 2013	$	35,410
Foreign currency translation impact		2,580
Balance at March 31, 2014	$	37,990
Additions		1,964
Foreign currency translation impact		(8,420	)
Balance at March 31, 2015	$	31,534

The Company has no accumulated impairment losses on goodwill. The Company performed a Step 0 qualitative assessment during the annual impairment review for fiscal 2015 as of October 31, 2014 and concluded that it is not more likely than not that the fair value of the Company’s single reporting unit is less than its carrying amount. Therefore, the two-step goodwill impairment test for the reporting unit was not necessary in fiscal 2015.

As described in Note 3. “Acquisitions,” in July 2014, the Company acquired ECP and AIS and recorded $18.5 million of IPR&D. The estimated fair value of the IPR&D was determined using a probability-weighted income approach, which discounts expected future cash flows to present value. The projected cash flows from the expandable catheter pump technology were based on certain key assumptions, including estimates of future revenue and expenses, taking into account the stage of development of the technology at the acquisition date and the time and resources needed to complete development. The Company used a discount rate of 22.5% and cash flows that have been probability adjusted to reflect the risks of product commercialization, which the Company believes are appropriate and representative of market participant assumptions.

The carrying value of the Company’s IPR&D assets and the change in the balance for the year ended March 31, 2015 is as follows:

	March 31, 2015
	(in $000’s)
Beginning balance	$	—
Additions		18,500
Foreign currency translation impact		(3,789	)
Ending balance	$	14,711

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Components of Stock-Based Compensation (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation	$ 16,520	$ 11,218	$ 9,501
Restricted stock units
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation	13,524	8,008	5,970
Stock Options
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation	2,708	2,679	2,680
Restricted Stock
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation	15	314	653
Employee Stock Purchase Plan
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation	$ 273	$ 217	$ 198

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Inventories

12 Months Ended

Mar. 31, 2015

Inventories

Note 6. Inventories

The components of inventories are as follows:

	March 31,
	2015		2014
	(in $000’s)
Raw materials and supplies	$	7,417	$	6,414
Work-in-progress		6,466		6,261
Finished goods		2,891		1,273
	$	16,774	$	13,948

The Company’s inventories relate to its circulatory care product lines, primarily the Impella and AB5000 product platforms. Finished goods and work-in-process inventories consist of direct material, labor and overhead. During the years ended March 31, 2015, 2014 and 2013, the Company recorded $2.2 million, $2.0 million and $1.2 million, respectively, in write-downs of inventory.

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Property and Equipment

12 Months Ended

Mar. 31, 2015

Property and Equipment

Note 7. Property and Equipment

The components of property and equipment are as follows:

	March 31,
	2015			2014
	(in $000’s)
Machinery and equipment	$	19,335		$	16,805
Furniture and fixtures		1,000			960
Leasehold improvements		2,874			1,876
Construction in progress		1,685			1,226
Total cost		24,894			20,867
Less accumulated depreciation		(15,767	)		(13,978	)
	$	9,127		$	6,889

Depreciation expense related to property and equipment was $2.7 million, $2.4 million and $2.5 million for the years ending March 31, 2015, 2014 and 2013, respectively.

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Stockholders' Equity

12 Months Ended

Mar. 31, 2015

Stockholders' Equity

Note 9. Stockholders’ Equity

Class B Preferred Stock

The Company has authorized 1,000,000 shares of Class B Preferred Stock, $.01 par value, of which the Board of Directors can set the designation, rights and privileges. No shares of Class B Preferred Stock have been issued or are outstanding.

Stock Repurchase Program

In November 2012, the Company’s Board of Directors authorized a stock repurchase program for up to $15.0 million of its common stock. The Company financed the stock repurchase program with its available cash. During the year ended March 31, 2013, the Company repurchased 1,123,587 shares for $15.0 million in open market purchases at an average cost of $13.39 per share, including commission expense. The Company completed the purchase of common stock under this stock repurchase program in January 2013.

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Components of Income Tax Benefit (Provision) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended												12 Months Ended
	Mar. 31, 2015		Dec. 31, 2014		Sep. 30, 2014		Jun. 30, 2014		Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2015		Mar. 31, 2014	Mar. 31, 2013
Income Taxes [Line Items]
Income (loss) before income taxes, foreign													$ 6,522		$ 4,263	$ 6,660
Income (loss) before income taxes	12,372		13,701		4,175		(1,483)		3,762	4,651	1,429	(1,312)	28,765		8,530	16,862
Current income tax provision, Federal													464		(100)	97
Current income tax provision, State													424		(106)
Current income tax provision, Foreign													1,283		525	996
Current income tax provision													2,171		319	1,093
Deferred income tax provision, Federal													(66,140)		825	825
Deferred income tax provision, State													(13,430)		35	(70)
Deferred income tax provision, Foreign													(7,524)
Deferred income tax provision													(87,094)		860	755
Total income tax (benefit) provision	(86,502)	[1]	1,017	[1]	336	[1]	226	[1]	140	258	370	411	(84,923)	[1]	1,179	1,848
United States
Income Taxes [Line Items]
Income (loss) before income taxes													$ 22,243		$ 4,267	$ 10,202

[1] Net income for the quarter and year ended March 31, 2015 included an income tax benefit of $84.9 million, primarily due to the release of the valuation allowance on certain deferred tax assets in the quarter ended March 31, 2015.

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Differences Between Federal Statutory Income Tax Rate and Effective Tax Rates (Detail)	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Reconciliation of Effective Income Tax Rate [Line Items]
Statutory income tax rate	35.00%	34.00%	34.00%
Change in valuation allowance	(342.80%)	(53.70%)	(11.50%)
Credits	(1.90%)	(20.10%)	(17.00%)
Foreign taxes	4.50%
State taxes, net	4.00%	12.90%	(6.90%)
Permanent differences	3.90%	0.40%
Stock based compensation	0.30%	0.90%	0.40%
Rate differential on foreign operations	0.20%	31.10%	9.70%
Expiry of state NOL carryforwards			2.10%
Other	(1.60%)	8.40%	0.20%
Effective tax rate	(295.20%)	13.90%	11.00%

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Summary of Restricted Stock and Restricted Stock Units Activity (Detail) (Restricted Stock and Restricted Stock Units, USD $)	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Restricted Stock and Restricted Stock Units
Number of Shares
Beginning Balance	1,174,000
Granted	674,000
Vested	(543,000)
Forfeited	(145,000)
Ending Balance	1,160,000	1,174,000
Weighted Average Grant Date Fair Value
Beginning Balance	$ 21.37
Granted	$ 22.07	$ 23.34	$ 21.82
Vested	$ 20.67
Forfeited	$ 22.95
Ending Balance	$ 21.90	$ 21.37

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Commitments and Contingencies (Tables)

12 Months Ended

Mar. 31, 2015

Future Minimum Lease Payments under All Significant Non Cancelable Operating Leases

Future minimum lease payments under non-cancelable operating leases as of March 31, 2015 are approximately as follows:

Fiscal Year Ending March 31,
	(in $000s)
2016	$	1,511
2017		1,528
2018		1,510
2019		1,520
2020		1,520
Thereafter		2,109
Total future minimum lease payments	$	9,698

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Components of Inventories (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Inventory [Line Items]
Raw materials and supplies	$ 7,417	$ 6,414
Work-in-progress	6,466	6,261
Finished goods	2,891	1,273
Inventories	$ 16,774	$ 13,948

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Segment and Enterprise Wide Disclosures

12 Months Ended

Mar. 31, 2015

Segment and Enterprise Wide Disclosures

Note 14. Segment and Enterprise Wide Disclosures

The Company operates in one business segment—the research, development and sale of medical devices to assist or replace the pumping function of the failing heart. The Company’s chief operating decision maker (determined to be the Chief Executive Officer) does not manage any part of the Company separately, and the allocation of resources and assessment of performance are based on the Company’s consolidated operating results. Approximately 77% and 74% of the Company’s total consolidated assets are located within the U.S. as of March 31, 2015 and 2014, respectively. The remaining assets are mostly located in Europe and are primarily related to the Company’s Impella production facility in Germany, and include goodwill and in-process research and development of $46.2 million and $38.0 million at March 31, 2015 and 2014, respectively, associated with the Impella acquisition in May 2005 and ECP acquisition in July 2014. Total assets outside of the U.S. excluding goodwill amounted to 10% and 8% of total consolidated assets at March 31, 2015 and 2014, respectively. International sales (sales outside the U.S. and primarily in Europe) accounted for 10%, 9% and 7% of total product revenue during the fiscal years ended March 31, 2015, 2014 and 2013, respectively.

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Acquisitions (Tables)

12 Months Ended

Mar. 31, 2015

Fair Value of the Consideration Transferred

The acquisition-date fair value of the consideration transferred is as follows:

	Total Acquisition Date Fair Value (in thousands)
Cash consideration	$	15,750
Contingent consideration		6,000
Total consideration transferred	$	21,750

Estimated Fair Values of the Assets Acquired and Liabilities Assumed

The following table summarizes the estimated fair values of the assets acquired and liabilities assumed on July 1, 2014, the date of acquisition (in thousands):

Acquired assets:
Cash and cash equivalents	$	53
Accounts receivable		25
Property and equipment		619
In-process research and development		18,500
Goodwill		1,964
Long-term deferred tax assets		1,874
Other assets acquired		141
Total assets acquired		23,176
Liabilities assumed:
Accounts payable		295
Accrued liabilities		131
Long-term deferred tax liabilities		1,000
Total liabilities assumed		1,426
Net assets acquired	$	21,750

Pro Forma Consolidated Financial Information

	Year Ended March 31,
	2015		2014
	(in $000’s)
Revenue	$	230,323	$	183,689
Income before income taxes		28,871		4,802
Net income		113,794		3,623

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Quantitative Information about Inputs and Valuation Methodologies Used for Fair Value Measurements Classified in Level 3 (Detail)	1 Months Ended	12 Months Ended
	Jul. 31, 2014	Mar. 31, 2015
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Discount rate	22.50%
ECP Entwicklungsgesellschaft mbH | Level 3 | Probability weighted income approach | Contingent Consideration | Base Case Scenario
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Probability of occurrence		40.00%
ECP Entwicklungsgesellschaft mbH | Level 3 | Probability weighted income approach | Contingent Consideration | Minimum
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Milestone date		2018
Discount rate		8.00%
ECP Entwicklungsgesellschaft mbH | Level 3 | Probability weighted income approach | Contingent Consideration | Minimum | Various Upside and Downside Scenarios
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Probability of occurrence		5.00%
ECP Entwicklungsgesellschaft mbH | Level 3 | Probability weighted income approach | Contingent Consideration | Maximum
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Milestone date		2021
Discount rate		12.00%
ECP Entwicklungsgesellschaft mbH | Level 3 | Probability weighted income approach | Contingent Consideration | Maximum | Various Upside and Downside Scenarios
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Probability of occurrence		25.00%

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Estimated Fair Values of the Assets Acquired and Liabilities Assumed (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013	Jul. 01, 2014
Acquired assets:
Goodwill	$ 31,534	$ 37,990	$ 35,410
Long-term deferred tax assets	45,206
ECP
Acquired assets:
Cash and cash equivalents				53
Accounts receivable				25
Property and equipment				619
In-process research and development				18,500
Goodwill				1,964
Long-term deferred tax assets				1,874
Other assets acquired				141
Total assets acquired				23,176
Liabilities assumed:
Accounts payable				295
Accrued liabilities				131
Long-term deferred tax liabilities				1,000
Total liabilities assumed				1,426
Net assets acquired				$ 21,750

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Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Net income	$ 113,688	$ 7,351	$ 15,014
Other comprehensive (loss) income:
Foreign currency translation (losses) gains	(16,613)	3,025	(1,974)
Net unrealized gains (losses) on marketable securities	13	(18)	2
Other comprehensive (loss) income	(16,600)	3,007	(1,972)
Comprehensive income	$ 97,088	$ 10,358	$ 13,042

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Acquisitions

12 Months Ended

Mar. 31, 2015

Acquisitions

Note 3. Acquisitions

Acquisition of ECP Entwicklungsgesellschaft mbH

On July 1, 2014, the Company entered into a share purchase agreement with its wholly owned German subsidiary, Abiomed Europe GmbH (“Abiomed Europe”) and Syscore GmbH (“Syscore”), a limited liability company located in Berlin, Germany, providing for the Company’s acquisition of all of the share capital of ECP Entwicklungsgesellschaft mbH (“ECP”), a limited liability company incorporated in Germany. ECP is engaged in research, development, prototyping and the production of a percutaneous expandable catheter pump which increases blood circulation from the heart with an external drive shaft. The Company’s acquisition of ECP closed on July 1, 2014.

The Company acquired ECP for $13.0 million in cash, with additional potential payouts totaling $15.0 million payable to Syscore based on the achievement of certain technical, regulatory and commercial milestones. These milestone payments may be made, at the Company’s option, by a combination of cash or the Company’s common stock. With respect to such milestone payments, the share purchase agreement provides:

• that, upon the earlier of (i) the Company’s receipt of European CE Marking approval relating to the sale of an expandable device based on certain patent rights acquired from ECP, or (ii) the Company’s bringing of a successful claim against a third party competitor (or reaching an economically equivalent settlement) for the infringement of certain patent rights acquired from ECP, it will pay Syscore an additional $7.0 million (provided that if such claim or settlement does not prohibit the third party competitor’s further marketing, production, sale, distribution, lease or use of any violating or infringing products, but only awards monetary damages to the Company or to Abiomed Europe, the amount payable to Syscore shall be limited to the lower of the amount of aggregate damages received and $7.0 million); and

• that, upon the first to occur of (i) the Company’s successful commercialization of one or more rotatable and expandable devices based on certain patent rights acquired from ECP, where such devices achieve aggregate worldwide revenues of $125.0 million, including the revenues of third-party licensees, or (ii) the Company’s sale of (A) ECP, (B) all or substantially all of ECP’s assets, or (C) certain of ECP’s patent rights, the Company will pay to Syscore the lesser of (x) one-half of the profits earned from such sale described in the foregoing item (ii), after accounting for the costs of acquiring and operating ECP, or (y) $15.0 million (less any previous milestone payment).

ECP’s Acquisition of AIS GmbH Aachen Innovative Solutions

In connection with the Company’s acquisition of ECP, ECP acquired all of the share capital of AIS GmbH Aachen Innovative Solutions (“AIS”), a limited liability company incorporated in Germany, pursuant to a share purchase agreement dated as of June 30, 2014, by and among ECP and AIS’s four individual shareholders. AIS, based in Aachen, Germany, holds certain intellectual property useful to ECP’s business, and, prior to being acquired by ECP, had licensed such intellectual property to ECP.

The purchase price for the acquisition of AIS’s share capital was approximately $2.8 million in cash, which was provided by the Company, and the acquisition closed immediately prior to Abiomed Europe’s acquisition of ECP. The share purchase agreement contains representations, warranties and closing conditions customary for transactions of its size and nature.

Purchase Price Allocation

The acquisition of ECP and AIS was accounted for as a business combination. The purchase price for the acquisition has been allocated to the assets acquired and liabilities assumed based on their estimated fair values.

The acquisition-date fair value of the consideration transferred is as follows:

	Total Acquisition Date Fair Value (in thousands)
Cash consideration	$	15,750
Contingent consideration		6,000
Total consideration transferred	$	21,750

The following table summarizes the estimated fair values of the assets acquired and liabilities assumed on July 1, 2014, the date of acquisition (in thousands):

Acquired assets:
Cash and cash equivalents	$	53
Accounts receivable		25
Property and equipment		619
In-process research and development		18,500
Goodwill		1,964
Long-term deferred tax assets		1,874
Other assets acquired		141
Total assets acquired		23,176
Liabilities assumed:
Accounts payable		295
Accrued liabilities		131
Long-term deferred tax liabilities		1,000
Total liabilities assumed		1,426
Net assets acquired	$	21,750

IPR&D is principally the estimated fair value of the ECP and AIS technology which had not reached commercial technological feasibility nor had alternative future use at the time of the acquisition and therefore the Company considered IPR&D, with assigned values to be allocated among the various IPR&D assets acquired.

Goodwill is calculated as the difference between the acquisition-date fair value of the consideration transferred and the fair values of the assets acquired and liabilities assumed. The goodwill resulting from these acquisitions arises largely from synergies expected from combining the operations of ECP and AIS with the Company’s existing operations. The goodwill is not deductible for income tax purposes.

All legal, consulting and other costs related to the acquisition, aggregating approximately $1.1 million, have been expensed as incurred and are included in selling, general and administrative expenses in the Company’s consolidated statements of operations. The results of operations for ECP and AIS are included in the Company’s consolidated statements of operations for the period from the July 1, 2014 acquisition date to March 31, 2015. The Company has no material revenues and incurred $2.3 million in net losses from July 1, 2014 through March 31, 2015 associated with the operations of ECP. This also includes a $0.5 million expense for the change in fair value of the contingent consideration from July 1, 2014 to March 31, 2015.

The following unaudited pro forma information presents the combined results of operations for the years ended March 31, 2015 and March 31, 2014, as if the Company had completed the ECP and AIS acquisitions at the beginning of fiscal 2014. The pro forma financial information is provided for comparative purposes only and is not necessarily indicative of what actual results would have been had the acquisition occurred on the date indicated, nor does it give effect to synergies, cost savings, fair market value adjustments, immaterial amortization expense and other changes expected to result from the acquisition. Accordingly, the pro forma financial results do not purport to be indicative of consolidated results of operations as of the date hereof, for any period ended on the date hereof, or for any other future date or period. The pro forma consolidated financial information has been calculated after applying the Company’s accounting policies and includes adjustments for transaction-related costs, to eliminate revenues earned by AIS from ECP and expenses paid by ECP to AIS associated with a license agreement between the two parties, interest expense incurred by ECP related to bank loans accounted as if the repayment of ECP debt had occurred on April 1, 2013 and was not outstanding during the periods, and income tax provision of AIS due to the elimination of revenue on the license agreement with ECP.

	Year Ended March 31,
	2015		2014
	(in $000’s)
Revenue	$	230,323	$	183,689
Income before income taxes		28,871		4,802
Net income		113,794		3,623

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Stock Award Plans and Stock-Based Compensation - Additional Information (Detail) (USD $)	12 Months Ended			1 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013	May 31, 2014	May 31, 2013	May 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock award plans, outstanding stock options expiration period	10 years
Description of share counts for awards other than 2008 Stock Incentive Plan	Each share of stock issued pursuant to any other type of award counts as 1.58 shares against the maximum number of shares issuable under the Plan for grants made on or after August 11, 2010 (and as 1.5 shares for grants made prior to that date).
Shares available for future issuance under the Plan	1,841,000
Aggregate intrinsic value of options exercised in period	$ 20,000,000	$ 16,300,000	$ 4,600,000
Proceeds from the exercise of stock options	10,927,000	9,360,000	2,936,000
Fair value of options vested in period	2,600,000	2,500,000	2,600,000
Weighted average grant-date fair value for options granted	$ 9.29	$ 9.85	$ 9.66
Expected dividend yield	0.00%
Stock-based compensation	16,520,000	11,218,000	9,501,000
ESPP, exercise price as a percentage of its market price	85.00%
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized stock-based compensation expense	4,600,000
Unrecognized stock-based compensation expense, weighted-average recognition period	2 years 1 month 6 days
Stock-based compensation	2,708,000	2,679,000	2,680,000
Performance Based Restricted Stock and Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized stock-based compensation expense	4,300,000
Unrecognized stock-based compensation expense, weighted-average recognition period	1 year 6 months
Shares of award granted, it is probable that the prescribed performance targets will be met	50,000
Stock-based compensation	8,000,000
Performance Based Restricted Stock and Restricted Stock Units | Share Based Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of award granted				379,752	268,988	195,188
Performance Based Restricted Stock and Restricted Stock Units | May 2014 Outstanding awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of award vested	373,938
Performance Based Restricted Stock and Restricted Stock Units | May 2013 Outstanding awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of award vested	149,265
Restricted Stock and Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized stock-based compensation expense	10,900,000
Unrecognized stock-based compensation expense, weighted-average recognition period	1 year 8 months 12 days
Weighted average grant-date fair value for restricted stock and restricted stock units granted	$ 22.07	$ 23.34	$ 21.82
Fair value of restricted stock and restricted stock units vested in period	11,200,000	6,000,000	3,000,000
Shares of award granted	674,000
Shares of award vested	543,000
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 273,000	$ 217,000	$ 198,000

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Commitments and Contingencies - Additional Information (Detail)	12 Months Ended									1 Months Ended
	Mar. 31, 2015 USD ($) sqft	Mar. 31, 2014 USD ($)	Mar. 31, 2013 USD ($)	Apr. 30, 2014 USD ($)	Apr. 30, 2015 Subsequent Event sqft	Mar. 31, 2015 For May 2014 through December 2015 USD ($)	Mar. 31, 2015 For January 2016 through February 2016 USD ($)	Mar. 31, 2015 For March 2016 through February 2018 USD ($)	Mar. 31, 2015 For March 2018 through February 2021 USD ($)	Jul. 31, 2013 Europe Lease Agreements sqft	Mar. 31, 2015 Europe Lease Agreements USD ($)	Mar. 31, 2015 Europe Lease Agreements EUR (€)
Commitments and Contingencies [Line Items]
Office space under operating lease	96,000				24,560					33,000
Facilities leases, base rent per month						$ 74,050	$ 85,818	$ 82,518	$ 85,030		$ 37,400	€ 34,500
Lease, expiration date										Jul. 31, 2023
Rent expense	1,900,000	1,500,000	1,600,000
License agreement, upfront payment				1,500,000
License agreement, maximum agreed additional payments upon achievement of development milestones				4,500,000
Payments obligations on achievement of certain development and regulatory milestones	$ 3,000,000

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Marketable Securities and Fair Value Measurements (Tables)

12 Months Ended

Mar. 31, 2015

Marketable Securities by Balance Sheet Classification

The Company’s marketable securities at March 31, 2015 and 2014 are classified on the balance sheet as follows (in thousands):

	March 31,
	2015		2014
	(in $000’s)
Short-term marketable securities (within one year to maturity)	$	109,557	$	55,663
Long-term marketable securities (one to five years to maturity)		13,996		41,761
	$	123,553	$	97,424

Marketable Securities

The Company’s marketable securities at March 31, 2015 and 2014 are invested in the following (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Market Value
	(in $000’s)
At March 31, 2015:
US Treasury mutual fund securities	$	19,487	$	—	$	—		$	19,487
Short-term government-backed securities		90,070		9		(9	)		90,070
Long-term government-backed securities		13,999		2		(5	)		13,996
	$	123,556	$	11	$	(14	)	$	123,553
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Market Value
	(in $000’s)
At March 31, 2014:
US Treasury mutual fund securities	$	31,487	$	—	$	—		$	31,487
Short-term government-backed securities		24,174		6		(4	)		24,176
Long-term government-backed securities		41,779		8		(26	)		41,761
	$	97,440	$	14	$	(30	)	$	97,424

Financial Instruments Measured at Fair Value

The following table presents the Company’s fair value hierarchy for its financial instruments measured at fair value as of March 31, 2015 and 2014:

	Level 1		Level 2		Level 3		Total
	(in $000’s)
At March 31, 2015:
Assets
U.S. Treasury mutual fund securities	$	—	$	19,487	$	—	$	19,487
Short-term government-backed securities		—		90,070		—		90,070
Long-term government-backed securities		—		13,996		—		13,996
Liabilities
Contingent consideration		—		—		6,510		6,510
	Level 1		Level 2		Level 3		Total
	(in$000’s)
At March 31, 2014:
U.S. Treasury mutual fund securities	$	—	$	31,487	$	—	$	31,487
Short-term government-backed securities		—		24,176		—		24,176
Long-term government-backed securities		—		41,761		—		41,761

Change in Fair Value of Contingent Consideration as Determined by Level 3 Inputs

The following table summarizes the change in fair value, as determined by Level 3 inputs, of the contingent consideration for the year ended March 31, 2015:

	March 31, 2015
	(in $000’s)
Beginning balance	$	—
Additions		6,000
Payments		—
Change in fair value		510
Ending balance	$	6,510

Quantitative Information about Inputs and Valuation Methodologies Used for Fair Value Measurements Classified in Level 3

The following table presents quantitative information about the inputs and valuation methodologies used for the Company’s fair value measurements as of July 1, 2014 and March 31, 2015 classified in Level 3:

	Valuation Methodology	Significant Unobservable Input	Weighted Average (range, if applicable)
Contingent consideration	Probability weighted income approach	Milestone dates	2018 to 2021
		Discount rate	8% to 12%
		Probability of occurrence	Probability adjusted level of 40% for the base case scenario and 5% to 25% for various upside and downside scenarios

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Summary of Unaudited Quarterly Results of Operations (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended												12 Months Ended
	Mar. 31, 2015		Dec. 31, 2014		Sep. 30, 2014		Jun. 30, 2014		Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2015		Mar. 31, 2014	Mar. 31, 2013
Quarterly Financial Information Disclosure [Abstract]
Income tax (benefit) provision	$ (86,502)	[1]	$ 1,017	[1]	$ 336	[1]	$ 226	[1]	$ 140	$ 258	$ 370	$ 411	$ (84,923)	[1]	$ 1,179	$ 1,848
Valuation Allowance of Deferred Tax Assets
Quarterly Financial Information Disclosure [Abstract]
Income tax (benefit) provision	$ (84,900)

[1] Net income for the quarter and year ended March 31, 2015 included an income tax benefit of $84.9 million, primarily due to the release of the valuation allowance on certain deferred tax assets in the quarter ended March 31, 2015.

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Computation of Basic and Diluted Net Income Per Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Basic Net Income Per Share
Net income	$ 98,874	$ 12,684	$ 3,839	$ (1,709)	$ 3,622	$ 4,393	$ 1,059	$ (1,723)	$ 113,688	$ 7,351	$ 15,014
Weighted average shares used in computing basic net income per share									40,632	39,334	39,113
Net income per share-basic	$ 2.40	$ 0.31	$ 0.09	$ (0.04)	$ 0.09	$ 0.11	$ 0.03	$ (0.04)	$ 2.80	$ 0.19	$ 0.38
Diluted Net Income Per Share
Net income	$ 98,874	$ 12,684	$ 3,839	$ (1,709)	$ 3,622	$ 4,393	$ 1,059	$ (1,723)	$ 113,688	$ 7,351	$ 15,014
Weighted average shares used in computing basic net income per share									40,632	39,334	39,113
Effect of dilutive securities									2,226	2,272	1,939
Weighted average shares used in computing diluted net income per share									42,858	41,606	41,052
Net income per share-diluted	$ 2.24	$ 0.30	$ 0.09	$ (0.04)	$ 0.09	$ 0.11	$ 0.03	$ (0.04)	$ 2.65	$ 0.18	$ 0.37

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Accrued Expenses

12 Months Ended

Mar. 31, 2015

Accrued Expenses

Note 13. Accrued Expenses

Accrued expenses consisted of the following:

	March 31,
	2015		2014
	(in $000’s)
Employee compensation	$	15,978	$	11,967
Research and development		1,744		1,587
Sales and income taxes		1,506		1,445
Warranty		1,103		794
Professional, legal and accounting fees		710		1,304
Other		853		802
	$	21,894	$	17,899

Accrued employee compensation consists primarily of accrued bonuses, accrued commissions and accrued employee benefits at March 31, 2015 and 2014.