Filed Pursuant to Rule 424(b)(5)

Registration No. 333-224918

CALCULATION OF REGISTRATION FEE

Title of Securities to be Registered	Amount to be Registered(1)(2)	Maximum Offering Price Per Share	Maximum Aggregate Offering Price	Amount of Registration Fee(3)
Common stock, $0.00001 par value per share:	4,945,000	$53.00	$262,085,000	$32,629.58

(1) Includes shares of Common Stock that may be purchased by the underwriters pursuant to their option to purchase additional shares of Common Stock.

(2) Includes shares of Common Stock sold by the selling stockholder.

(3) Calculated in accordance with Rule 457(r) under the Securities Act of 1933, as amended. Represents deferred payment of the registration fees in connection with the registrant’s Registration Statement on Form S-3 (Registration No. 333-224918) being paid herewith.

Prospectus Supplement
(To prospectus dated May 14, 2018)

Axon Enterprise, Inc.

4,300,000 Shares of Common Stock

This is a public offering of shares of common stock of Axon Enterprise, Inc.

We are offering 4,000,000 shares of our common stock in this offering. The selling stockholder identified in this prospectus supplement is offering an additional 300,000 shares of our common stock. We will not receive any of the proceeds from the sale of the shares being sold by the selling stockholder.

Our common stock is listed on The NASDAQ Global Select Market under the symbol “AAXN.” On May 16, 2018, the closing sale price for our common stock was $54.33 per share.

Investing in our common stock involves a high degree of risk. See “Risk Factors” beginning on page S-7 of this prospectus supplement and any other risk factors included in the documents incorporated by reference herein for a discussion of certain risks that you should consider in connection with an investment in our common stock.

	Per Share		Total
Public offering price	$	53.00	$	227,900,000
Underwriting discounts and commissions(1)	$	2.5175	$	10,825,250
Proceeds, before expenses, to us	$	50.4825	$	201,930,000
Proceeds, before expenses, to the selling stockholder	$	50.4825	$	15,144,750

(1) See “Underwriting” beginning on page S-19 of this prospectus supplement for additional information regarding underwriting compensation to be paid by us and the selling stockholder.

We have granted the underwriters the right to purchase, exercisable within a 30-day period, up to an additional 645,000 shares of our common stock. The selling stockholder will not receive any proceeds from the exercise of the underwriters’ option to purchase additional shares from us.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this prospectus supplement or the accompanying prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

Delivery of shares of our common stock will be made to investors on or about May 21, 2018.

J.P. Morgan		Morgan Stanley
Baird	Needham & Company	Raymond James	William Blair

May 17, 2018

TABLE OF CONTENTS

Prospectus Supplement

	Page
About this Prospectus Supplement	S-ii
Cautionary Note Regarding Forward-Looking Statements	S-iii
Summary	S-1
The Offering	S-3
Risk Factors	S-7
Use of Proceeds	S-9
Price Range of Common Stock	S-10
Dividend Policy	S-11
Capitalization	S-12
Description of Common Stock	S-13
Selling Stockholder	S-14
Material U.S. Federal Income Tax Considerations for Non-U.S. Holders	S-15
Underwriting	S-19
Legal Matters	S-24
Experts	S-25
Where You Can Find More Information	S-26
Incorporation of Certain Documents by Reference	S-27

Prospectus

	Page
Risk Factors	1
About this Prospectus	2
Cautionary Statement Regarding Forward-Looking Statements	2
The Company	3
Ratio of Earnings to Fixed Charges	4
Use of Proceeds	5
Securities We May Offer	6
Description of Capital Stock	6
Description of Debt Securities	10
Description of Warrants	17
Description of Units	19
Plan of Distribution	22
Selling Securityholders	25
Legal Matters	25
Experts	25
Where You Can Find More Information	26
Incorporation by Reference	26

Unless the context suggests otherwise, all references to “us,” “our,” “Axon” “we,” the “Company” and similar designations refer to Axon Enterprise, Inc. and, where appropriate, our subsidiaries.

S-i

ABOUT THIS PROSPECTUS SUPPLEMENT

This document is in two parts. The first part is this prospectus supplement, which describes the specific terms of this offering and also adds to and updates information contained in the accompanying prospectus and the documents incorporated by reference into this prospectus supplement and the accompanying prospectus. The second part, the accompanying prospectus, gives more general information, some of which may not apply to this offering. You should read this prospectus supplement and the accompanying prospectus, including the information incorporated by reference herein and therein and any free writing prospectus we have authorized for use in connection with this offering, in their entirety before making an investment decision.

You should rely only on the information contained, or incorporated by reference, in this prospectus supplement and the accompanying prospectus and any free writing prospectus we authorize for use in connection with this offering. Neither we nor the selling stockholder nor the underwriters have authorized anyone to provide you with different information. If anyone provides you with different or inconsistent information, you should not rely on it. You should assume that the information in this prospectus supplement, the accompanying prospectus, any document incorporated by reference herein or therein or any free writing prospectus we have authorized for use in connection with this offering is accurate or complete only as of their respective dates, regardless of the time of delivery of this prospectus supplement, the accompanying prospectus and any authorized free writing prospectus. Our business, financial condition, results of operations and prospects may have changed since those dates.

In this prospectus supplement, as permitted by law, we “incorporate by reference” information from other documents that we file with the Securities and Exchange Commission, or the SEC. This means that we can disclose important information to you by referring you to those documents. The information incorporated by reference is considered to be a part of this prospectus supplement and the accompanying prospectus and should be read with the same care. When we update the information contained in documents that have been incorporated by reference by making future filings with the SEC, the information included or incorporated by reference in this prospectus supplement is considered to be automatically updated and superseded. In other words, in case of a conflict or inconsistency between information contained in this prospectus supplement and the accompanying prospectus or the information contained in a document incorporated by reference into this prospectus supplement, you should rely on the information contained in the document that was filed later. Please refer to “Incorporation by Reference” in this prospectus supplement.

Neither we nor the selling stockholder nor and the underwriters are making an offer to sell the securities in any jurisdiction where the offer or sale is not permitted or in which the person making such offer or solicitation is not qualified to do so or to any person to whom it is unlawful to make such offer or solicitation.

You should not consider any information included or incorporated by reference in this prospectus supplement or the accompanying prospectus to be investment, legal or tax advice. You should consult your own counsel, accountants and other advisers for legal, tax, business, financial and related advice regarding the purchase of the shares of common stock offered by this prospectus supplement.

S-ii

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

This prospectus supplement and the accompanying prospectus, including the documents incorporated by reference into this prospectus supplement and the accompanying prospectus, and any free writing prospectus we authorize for use in connection with this offering may contain forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, or the Securities Act, and Section 21E of the Securities Exchange Act of 1934, as amended, or the Exchange Act, which are subject to risks and uncertainties. In some cases, you can identify these statements by forward-looking words such as “may,” “might,” “will,” “should,” “expects,” “plans,” “anticipates,” “believes,” “estimates,” “predicts,” “potential” or “continue,” the negative of these terms and other comparable terminology. These forward-looking statements, which are subject to risks, uncertainties and assumptions about us, may include projections of our future financial performance, our anticipated growth strategies and anticipated trends in our business. Examples of forward-looking statements include statements regarding:

our intentions about future development efforts and activities, including our intentions to invest in research and development as well as the development of new product and service lines and enhanced features for our existing product and service lines;

• customer upgrades and replacements of existing conducted electrical weapons, or CEW, units;

• the impact of foreign currencies in 2018;

• our investment in the development of sales in the international, military and law enforcement market;

• the expansion of our sales force;

• the impact of cloud and mobile technologies are having on the police environment;

• our marketing and sales activities, including our efforts to increase direct sales;

• the growth of the video evidence capture and management market;

• the expected growth of the personal security market;

• the sufficiency of our facilities and our strategy to expand manufacturing capacity if needed;

• the benefits of our CEW products compared to other lethal and less-lethal alternatives;

• the benefits of our Software and Sensors products compared to our competitors’;

• our ability to maintain secure and consistent customer data access and storage, including the use of third-party data storage providers, and the impact of a loss of customer data, a breach of security or an extended outage;

• the impact of the U.S. Tax Cuts and Jobs Act, or the Tax Act;

• the complaint filed by Digital Ally; and

• our financing and growth strategies.

Forward-looking statements are not guarantees of future performance and involve risks and uncertainties. Such forward-looking statements included or incorporated by reference in this prospectus supplement, the accompanying prospectus or any applicable free writing prospectus are based on information available to us as of the date such statements were made and our then-current expectations about future events, which are inherently subject to change and involve risks

S-iii

and uncertainties. There are important factors that could cause our actual results, level of activity, performance or achievements to differ materially from the results, level of activity, performance or achievements expressed or implied by the forward-looking statements, including those factors discussed under the heading “Risk Factors” in our Annual Report on Form 10-K for the fiscal year ended December 31, 2017 and Quarterly Report on Form 10-Q for the quarter ended March 31, 2018, as well as the heading “Risk Factors” in this prospectus supplement.

We do not undertake any obligation to update any forward-looking statements included or incorporated by reference in this prospectus supplement or the accompanying prospectus or any applicable free writing prospectus, whether as a result of new information, future events or otherwise, except as required by law. All such forward-looking statements should be read as of the time the statements were made and with the recognition that these forward-looking statements may not be complete or accurate at a later date.

S-iv

SUMMARY

This summary highlights information contained elsewhere in this prospectus supplement, the accompanying prospectus and the documents incorporated by reference in the prospectus supplement and the accompanying prospectus. This summary sets forth the material terms of this offering but does not contain all of the information you should consider before investing in our common stock. You should read carefully this entire prospectus supplement and the accompanying prospectus, including the documents incorporated by reference in this prospectus supplement and the accompanying prospectus, and any free writing prospectus we authorize for use in connection with this offering, before making an investment decision to purchase our common stock.

You should pay special attention to the risks of investing in our common stock which are discussed in the section titled “Risk Factors” in this prospectus supplement, as well as the consolidated financial statements and notes to those consolidated financial statements incorporated by reference into this prospectus supplement and the accompanying prospectus. This prospectus supplement may add to, update or change information in the accompanying prospectus.

Overview

Our core mission is to protect life through innovative technologies that make communities safer. We are the market leader in the development, manufacture and sale of CEWs designed for use by law enforcement, corrections, military forces, private security personnel and by private individuals for personal defense. We are also the market leader in developing, manufacturing and selling connected wearable on-officer cameras as well as developing and selling cloud-based digital evidence management software. We have established a robust network that connects devices, apps and people primarily in the law enforcement vertical market. We aim to have every public safety officer in the world carry a TASER, deploy an Axon camera and be connected to the Axon network.

The three foundations for our growth strategy are devices, apps and people.

Devices

Our TASER CEWs are one of the few weapons that can incapacitate a person while drastically limiting the risk for death and/or serious injury. Over the past two decades, the TASER CEW has become one of the most frequently used weapons in the North American law enforcement market, with use-of-force injuries and deaths dropping dramatically as a result. Outside of weapons, we produce devices that primarily fall within three categories: on-officer cameras that capture critical digital evidence aimed at protecting truth, a range of related accessory hardware devices and an in-car camera variant called Axon Fleet. We refer to these cameras, related accessories and devices collectively as “Axon” products. We believe our CEWs and Axon cameras should be standard-issue equipment for all patrol officers domestically and internationally. We have created, and are continuing to create, service plans and product bundles to allow agencies to have the latest devices and technology at predictable annual costs.

Apps

Axon’s Evidence.com platform is designed to help agencies securely store, manage and share all digital evidence. Our software platform features continuous improvement with regular software updates that enable our customers to always have access to the latest technology. Recent new features include secure sharing, audit trails, integration of other data sources and transcription and redaction services. These feature sets are designed to provide our customers with valuable tools to police more efficiently and effectively while enabling greater transparency with the communities they serve. An increasing number police agencies trust Axon to host their video evidence data, which is captured via our devices, apps and software, stored in our secure cloud and accessed via the Axon network.

S-1

People

Our TASER weapons and Axon software and sensors platforms have allowed us to build relationships with more than 20,000 public safety agencies worldwide. Axon’s goal is to bring modern information technology capabilities to every law enforcement officer. Some of our customers report that police officers are spending over 60% of their time on paperwork-related tasks, rather than on value-added public safety work. We see a large opportunity to leverage our connected platform to enable a broad suite of mobile, wearable and data management capabilities. Axon is also improving workflows throughout the public safety chain, from the incident on the scene to the court room. With our software, police officers can share evidence with prosecutors during discovery while maintaining a secure and encrypted chain of custody. Axon’s cohesive ecosystem is delivering increased value to all public safety stakeholders, including state and municipal police agencies, police chiefs and other leadership, patrol officers, state patrols and officers, agency detectives, public prosecutors, district attorneys and others in the public safety and judicial communities, as well as the public communities they serve.

Corporate History and Information

We were incorporated in Arizona in September 1993 as ICER Corporation. We changed our name to AIR TASER, Inc. in December 1993 and to TASER International, Incorporated in April 1998. In January 2001, we reincorporated in Delaware as TASER International, Inc. and changed our name to Axon Enterprise, Inc. in April 2017.

Our principal executive offices are located at 17800 North 85th Street, Scottsdale, Arizona, 85255 and our telephone number is (480) 991-0797. Our website address is www.axon.com. Information contained on our website is not incorporated by reference into this prospectus supplement, and you should not consider any information contained on, or that can be accessed through, our website as part of this prospectus supplement or in deciding whether to purchase the shares of common stock in this offering.

S-2

THE OFFERING

The following summary is provided solely for your convenience and is not intended to be complete. You should read the full text and more specific details contained elsewhere in this prospectus supplement and the accompanying prospectus. As used in this section, “we,” “our” and “us” refer only to Axon Enterprise, Inc. and not to any of its subsidiaries. For a more detailed description of our common stock, see “Description of Common Stock” in this prospectus supplement and “Description of Capital Stock — Common Stock” in the accompanying prospectus.

Issuer	Axon Enterprise, Inc.
Common Stock Offered by Us	4,000,000 shares of our common stock (or 4,645,000 shares of our common stock if the underwriters exercise their option to purchase additional shares in full).
Common Stock Offered by the Selling Stockholder	300,000 shares of our common stock.
Common Stock to be Outstanding after This Offering	57,489,160 shares immediately after this offering (assuming no exercise of the underwriters’ option to purchase additional shares and 53,322,608 shares outstanding on April 30, 2018).
Public Offering Price per Share	$ 53.00
Use of Proceeds	We anticipate that the net proceeds of this offering will be $201,430,000 (or $233,991,212 if the underwriters exercise their option to purchase additional shares in full), after deducting the underwriting discounts and commissions and our estimated offering expenses related to this offering. We intend to use the net proceeds from this offering for working capital and other general corporate purposes. The amount and timing of these expenditures will vary depending on a number of factors, including competitive, market and technological developments and the rate of growth, if any, of our business. In addition, we may use a portion of the net proceeds to acquire or invest in complementary companies, product lines, products, services or technologies. However, currently, we have no understandings or agreements with respect to any such acquisition or investment. We will not receive any proceeds from the sale of 300,000 shares of our common stock by Mr. Patrick W. Smith, our Chief Executive Officer and Co-Founder, or the selling stockholder. If the underwriters exercise their options to purchase additional shares, the selling shareholder will not receive any proceeds from such exercise.

S-3

U.S. Federal Income Tax Considerations

For a discussion of certain U.S. federal income tax consequences relating to the ownership and disposition of the shares of our common stock. See “Material U.S. Federal Income Tax Considerations for Non-U.S. Holders.” You should consult your tax adviser with respect to the U.S. federal income tax consequences of owning and disposing of shares of our common stock in light of your own particular situation and with respect to any tax consequences arising under the laws of any state, local, foreign or other taxing jurisdiction.

Risk Factors

Your investment in our common stock involves risk. Please refer to “Risk Factors” and all other information included in this prospectus supplement, the accompanying prospectus and the documents incorporated by reference for a discussion of factors that should be considered before you invest in our common stock.

S-4

SUMMARY CONSOLIDATED FINANCIAL DATA

The following tables set forth our summary consolidated financial data as of the dates and for the periods indicated. The summary consolidated financial data as of December 31, 2017 and 2016 and for the years ended December 31, 2017, 2016 and 2015 are derived from our audited consolidated financial statements included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2017, or 2017 Form 10-K, which is incorporated by reference into this prospectus supplement. The summary consolidated financial data as of March 31, 2018 and for the three months ended March 31, 2018 and 2017 are derived from our unaudited consolidated financial statements included in our Quarterly Report on Form 10-Q for the quarter ended March 31, 2018, which is incorporated by reference into this prospectus supplement. The unaudited interim condensed consolidated financial statements were prepared on a basis substantially consistent with our audited consolidated financial statements and, in the opinion of management, reflect all adjustments, consisting only of normal recurring adjustments, necessary to present fairly the financial position and results of operations for the interim periods presented. The operating results for any period should not be considered indicative of results for any future period and our interim results are not necessarily indicative of the results to be expected for the full year. The following summary consolidated financial data should be read in conjunction with the section entitled “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and the consolidated financial statements and the related notes thereto included in our 2017 Form 10-K and our Quarterly Report on Form 10-Q for the quarter ended March 31, 2018, each of which is incorporated by reference into this prospectus supplement and the accompanying prospectus.

	Fiscal Year Ended December 31,						Three Months Ended March 31, (unaudited)
	2017		2016		2015		2018		2017
	(in thousands, except per share data)
Consolidated Statement of Operations Data:
Net sales	$	343,798	$	268,245	$	197,892	$	101,215	$	79,242
Total cost of sales	136,710		97,709		69,245		36,754		30,572
Gross margin	207,088		170,536		128,647		64,461		48,670
Income from operations	13,023		31,851		35,335		13,583		5,350
Net income	$	5,207	$	17,297	$	19,933	$	12,926	$	4,580
Net income per share:
Basic	$	0.10	$	0.33	$	0.37	$	0.24	$	0.09
Diluted	$	0.10	$	0.32	$	0.36	$	0.24	$	0.09
Shares used in computing net income per share:
Basic	52,726		52,667		53,548		53,119		52,418
Diluted	53,898		53,536		54,638		54,532		53,677

S-5

	As of December 31,				As of March 31,(unaudited)
	2017		2016		2018
	(in thousands)
Consolidated Balance Sheet Data:
Cash and cash equivalents	$	75,105	$	40,651	$	92,330
Short-term investments	6,862		48,415		4,475
Working capital	97,242		99,192		130,260
Total assets	338,112		278,163		392,985
Total liabilities	170,668		127,275		193,656
Total stockholders’ equity	167,444		150,888		199,329

S-6

RISK FACTORS

Investing in our common stock involves a high degree of risk. In addition to the other information contained in this prospectus supplement, the accompanying prospectus and in the documents that we incorporate by reference in this prospectus supplement and the accompanying prospectus, you should carefully consider the risks discussed below and under the heading “Risk Factors” in our 2017 Form 10-K and our Quarterly Report on Form 10-Q for the quarter ended March 31, 2018 before making a decision about investing in our common stock. The risks and uncertainties discussed below and in our 2017 Form 10-K and our Quarterly Report on Form 10-Q for the quarter ended March 31, 2018 are not the only ones facing us. Additional risks and uncertainties not presently known to us, or that we currently see as immaterial, may also harm our business. If any of these risks occur, our business, financial condition and operating results could be harmed, the trading price of our common stock could decline and you could lose part or all of your investment.

Risks Related to Our Common Stock

If we seek additional financing in the future, your ownership interest could be significantly diluted

We may need additional financing to execute on our current or future business strategies, including to develop new or enhance existing products and services, acquire businesses and technologies, or otherwise to respond to competitive pressures.

If we obtain such financing through the issuance of equity or debt securities, your percentage ownership in us could be significantly diluted, and newly-issued securities may have rights, preferences or privileges senior to those of existing stockholders. If we obtain debt financing, a substantial portion of our operating cash flows may be dedicated to the payment of principal and interest on such indebtedness and, consequently, limit the funds available for our business activities. Further, if adequate funds are not available to us on acceptable terms, our ability to fund our operations, take advantage of unanticipated opportunities, develop or enhance our products and services or otherwise respond to competitive pressures would be significantly limited, all of which could harm our business.

Our stock price may be volatile, which could result in securities class action litigation against us.

The market price of our common stock could be subject to wide fluctuations in response to, among other things, the risk factors described in this prospectus supplement, the accompanying prospectus and the documents incorporated by reference in the prospectus supplement or the accompanying prospectus, and other factors beyond our control, such as fluctuations in the valuation of companies perceived by investors to be comparable to us and research analyst coverage about our business.

Furthermore, the stock markets have experienced price and volume fluctuations that have affected and continue to affect the market prices of equity securities of many companies. These fluctuations often have been unrelated or disproportionate to the operating performance of those companies. These broad market and industry fluctuations, as well as general economic, political and market conditions, such as recessions, interest rate changes or international currency fluctuations, have and may continue to affect the market price of our common stock.

In the past, many companies that have experienced volatility in the market price of their stock have been subject to securities class action litigation. We may become the target of this type of litigation in the future. Securities litigation against us could result in substantial costs and divert our management’s attention from other business concerns, which could seriously harm our business.

S-7

We currently do not intend to pay dividends on our common stock and, consequently, your only opportunity to achieve a return on your investment in our common stock is if the price of our common stock appreciates.

We currently do not plan to declare dividends on shares of our common stock in the foreseeable future. Consequently, the only opportunity to achieve a return on investment on our common stock will be if the market price of our common stock appreciates and shares are sold at a profit.

Certain provisions of our certificate of incorporation and bylaws and of Delaware law could prevent a takeover that stockholders consider favorable and could also reduce the market price of our stock.

Our amended and restated certificate of incorporation and our bylaws contain provisions that could delay or prevent a merger, acquisition or other change in control that stockholders may consider favorable, including transactions in which stockholders might otherwise receive a premium for their shares. These provisions may also prevent or delay attempts by stockholders to replace or remove our current management or members of our board of directors. These provisions include:

• providing for a classified board of directors with staggered three-year terms, which could delay the ability of stockholders to change the membership of a majority of our board of directors;

• requiring super-majority approval to amend or repeal our amended and restated certificate of incorporation and our bylaws, which may discourage or deter a potential acquirer from attempting to obtain control over us;

• limiting the ability of our stockholders to act by written consent and call a special meeting, which could delay the ability of our stockholders to take action or force consideration of a proposal;

• requiring advance notice of stockholder business, nominations and proposals to be considered at annual meetings of stockholders, which may discourage or deter a potential acquirer from conducting a solicitation of proxies to elect the acquirer’s own slate of directors or otherwise attempting to obtain control of us;

• not providing for cumulative voting in the election of directors, which limits the ability of minority stockholders to elect director candidates;

• authorizing our board of directors to issue, without stockholder approval, preferred stock rights senior to those of common stock, which could be used to significantly dilute the ownership of a hostile acquirer; and

• requiring super-majority approval to remove a director, with or without cause, which may discourage or deter a potential acquirer from attempting to obtain control of us by removing a director and electing the acquirer’s own slate of directors.

In addition, we are subject to the provisions of Section 203 of the Delaware General Corporation Law. These provisions may prohibit large stockholders, in particular those owning 15% or more of our outstanding common stock, from engaging in certain business combinations without approval of substantially all of our stockholders for a certain period of time.

These and other provisions in our amended and restated certificate of incorporation, our bylaws and under Delaware law could discourage potential takeover attempts and reduce the price that acquirers might be willing to pay for shares of our common stock which, in turn, may result in the market price of our common stock being lower than it would be without these provisions.

S-8

USE OF PROCEEDS

We estimate that the net proceeds from this offering of common stock will be approximately $201,430,000, after deducting underwriting discounts and estimated offering expenses payable by us. If the underwriters’ option to purchase additional shares of our common stock in this offering is exercised in full, we estimate that the net proceeds from this offering will be approximately $233,991,212, after deducting underwriting discounts and estimated offering expenses payable by us. The selling stockholder will not receive any proceeds from the exercise of the underwriters’ option to purchase additional shares from us.

We intend to use the net proceeds from this offering for working capital and other general corporate purposes. The amount and timing of these expenditures will vary depending on a number of factors, including competitive, market and technological developments and the rate of growth, if any, of our business. In addition, we may use a portion of the net proceeds to acquire or invest in complementary companies, product lines, products, services or technologies. However, currently, we have no understandings or agreements with respect to any such acquisition or investment.

Pending their use, we plan to invest the net proceeds from this offering in cash, money market funds, commercial paper, corporate bonds, U.S. agency debt securities and U.S. government bonds.

We will not receive any proceeds from the sale of shares of common stock by Mr. Patrick W. Smith, our Chief Executive Officer and Co-Founder

S-9

PRICE RANGE OF COMMON STOCK

Our common stock is listed on The NASDAQ Global Select Market under the symbol “AAXN.” The following table sets forth the high and low sales price per share of our common stock as reported on The NASDAQ Global Select Market for the periods indicated:

	High	Low
Fiscal Year Ending December 31, 2018
First Quarter	$40.49	$24.50
Second Quarter through May 16, 2018	$58.18	$38.83
Fiscal Year Ended December 31, 2017
First Quarter	$27.56	$22.05
Second Quarter	$28.17	$21.18
Third Quarter	$26.31	$21.25
Fourth Quarter	$27.09	$20.57
Fiscal Year Ended December 31, 2016
First Quarter	$20.69	$13.56
Second Quarter	$24.94	$17.18
Third Quarter	$30.15	$24.46
Fourth Quarter	$28.49	$21.50

On May 16, 2018, the last reported sale price of our common stock on The NASDAQ Global Select Market was $54.33 per share. As of March 31, 2018, we had 253 holders of record of our common stock. The actual number of stockholders is greater than this number of record holders, and includes stockholders who are beneficial owners, but whose shares are held in street name by brokers and other nominees. This number of holders of record also does not include stockholders whose shares may be held in trust by other entities.

S-10

DIVIDEND POLICY

We have never declared or paid cash dividends on our common stock. We currently intend to retain all available funds and any future earnings for use in the operation of our business and do not anticipate paying any dividends on our common stock in the foreseeable future. Any future determination to declare dividends will be made at the discretion of our board of directors and will depend on our financial condition, results of operations, capital requirements, general business conditions and other factors that our board of directors may deem relevant.

S-11

CAPITALIZATION

The following table sets forth our consolidated cash, cash equivalents and short-term investments and capitalization as of March 31, 2018:

• on an actual basis; and

• on an as-adjusted basis to give effect to this offering of common stock (assuming the underwriters in this offering do not exercise their option to purchase additional shares of common stock), after deducting underwriting discounts and estimated offering expenses payable by us and the net exercise of 300,000 options by the selling stockholder as part of this offering. The shares of common stock issued to the selling stockholder upon such exercise are being sold in this offering.

You should read this table in conjunction with “Use of Proceeds” as well as our “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and our consolidated financial statements, including the related notes, included in our Quarterly Report on Form 10-Q for the quarter ended March 31, 2018, which is incorporated by reference herein.

	As of March 31, 2018
	Actual			As Adjusted
	(unaudited) (in thousands, except per share data)
Cash, cash equivalents and short-term investments	$	96,805		$	298,235
Debt:
Capital lease obligation	100			100
Total debt	100			100
Stockholders’ equity:
Preferred stock, $0.00001 par value per share; 25,000,000 shares authorized; no shares issued and outstanding	—			—
Common stock, $0.00001 par value per share; 200,000,000 shares authorized; 53,307,083 shares issued and outstanding, actual; 57,463,635 shares issued and outstanding, as adjusted(1)	1			1
Additional paid-in capital	202,344			403,774
Treasury stock at cost, 20,220,227 shares, actual; 20,220,227 shares issued and outstanding, as adjusted	(155,947		)	155,947
Accumulated other comprehensive income (loss)	(2,174		)	(2,174		)
Retained earnings	155,105			155,105
Total stockholders’ equity	199,329			400,759
Total capitalization	$	296,234		$	699,094

(1) The number of shares of common stock issued and outstanding in the actual and as adjusted columns in the table above excludes, as of March 31, 2018 (shares in thousands):

• 725,884 shares of common stock issuable upon the exercise of options outstanding with a weighted average exercise price of $5.04 per share;

• 425,884 shares of common stock issuable upon the exercise of options outstanding with a weighted average exercise price of $4.76 per share (as adjusted);

• 2,026,517 shares of common stock issuable upon the vesting of outstanding RSUs; and

• 801,936 shares of our common stock reserved for future issuance under our 2016 Stock Incentive Plan and any future increase in shares reserved for issuance under such plan.

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DESCRIPTION OF COMMON STOCK

Please read the information discussed under the heading “Description of Capital Stock — Common Stock” beginning on page 6 of the accompanying prospectus. As of March 31, 2018, we had 53,307,083 shares of common stock issued and outstanding and had reserved approximately 802,000 additional shares of common stock for issuance under our equity compensation plans.

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SELLING STOCKHOLDER

We present the information below based on 53,322,608 shares of our common stock outstanding on April 30, 2018.

We have presented the beneficial ownership of our common stock by our Co-Founder and Chief Executive Officer, Patrick W. Smith, in accordance with SEC rules. Under these rules, Mr. Smith’s beneficial ownership includes common stock over which Mr. Smith has sole or shared voting or investment power as of April 30, 2018. In addition, Mr. Smith’s beneficial ownership includes common stock that (1) could be purchased pursuant to the exercise of all all of Mr. Smith’s stock options that vest within 60 days of April 30, 2018, or (2) vest under Mr. Smith’s restricted stock awards within 60 days of April 30, 2018.

We present Mr. Smith’s beneficial ownership (after giving effect to Mr. Smith’s net exercise of 300,000 options) prior to this offering and after Mr. Smith’s sale of 300,000 shares of common stock in this offering, assuming our sale of 4,000,000 shares of common stock in this offering or our sale of an additional 645,000 shares of common stock if the underwriters exercise in full their option to purchase additional shares. Mr. Smith will not receive any proceeds from the exercise of the underwriters’ option to purchase additional shares from us.

Mr. Smith has informed us that he is not a broker-dealer or an affiliate of a broker-dealer. Mr. Smith’s address is c/o Axon Enterprise, Inc., 17800 North 85th Street, Scottsdale, Arizona, 85255.

	Beneficial Ownership Prior to this Offering			Beneficial Ownership After this Offering if the Option to Purchase Additional Shares is not Exercised by Us		Beneficial Ownership After this Offering if the Option to Purchase Additional Shares is Exercised in Full by Us
Selling Stockholder Name	Shares Beneficially Owned	Percentage of Shares Beneficially Owned	Number of Shares Being Offered by the Selling Stockholder	Shares Beneficially Owned	Percentage of Beneficial Ownership	Shares Beneficially Owned	Percentage of Beneficial Ownership
Patrick W. Smith(1)	1,137,633	2.12%	300,000	837,633	1.46%	837,633	1.44%

(1) Includes 218,397 shares of common stock issuable to Mr. Smith (after giving effect to Mr. Smith’s net exercise of 300,000 options) if, within 60 days of April 30, 2018, 218,397 options vested and were hypothetically exercised. Mr. Smith had no restricted stock awards scheduled to vest within 60 days.

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MATERIAL U.S. FEDERAL INCOME TAX CONSIDERATIONS FOR NON-U.S. HOLDERS

The following is a summary of the material U.S. federal income tax considerations of the ownership and disposition of our common stock to non-U.S. holders (defined below), but does not purport to be a complete analysis of all the potential tax considerations relating thereto. This summary is based upon the provisions of the Internal Revenue Code of 1986, as amended, or the Code, Treasury regulations promulgated thereunder, administrative rulings and judicial decisions, all as of the date hereof. These authorities may be changed or subject to differing interpretations, possibly with retroactive effect, so as to result in U.S. federal income tax consequences different from those set forth below. We have not sought any ruling from the Internal Revenue Service, or the IRS, with respect to the statements made and the conclusions reached in the following summary, and there can be no assurance that the IRS will agree with such statements and conclusions.

This summary also does not address the tax considerations arising under the laws of any U.S. state or local or any non-U.S. jurisdiction, U.S. federal estate or gift tax laws, the Medicare tax on net investment income or any alternative minimum tax consequences. In addition, this discussion does not address tax considerations applicable to an investor’s particular circumstances or to investors that may be subject to special tax rules, including, without limitation:

• banks, insurance companies or other financial institutions;

• tax-exempt organizations;

• dealers in securities or currencies;

• traders in securities that elect to use a mark-to-market method of accounting for their securities holdings;

• persons that own, or are deemed to own, more than five percent of our capital stock;

• certain former citizens or long-term residents of the United States;

• persons who hold our common stock as a position in a hedging transaction, “straddle,” “conversion transaction” or other risk reduction transaction;

• persons who do not hold our common stock as a capital asset within the meaning of Section 1221 of the Code (generally, for investment purposes);

• S corporations, partnerships or other entities or arrangements treated as partnerships for U.S. federal income tax purposes (or investors in any such entities);

• persons deemed to sell our common stock under the constructive sale provisions of the Code;

• regulated investment companies or real estate investment trusts;

• pension plans;

• controlled foreign corporations;

• passive foreign investment companies; or

• persons that acquire our common stock as compensation for services.

In addition, if a partnership, including any entity or arrangement classified as a partnership for U.S. federal income tax purposes, holds our common stock, the tax treatment of a partner generally will depend on the status of the partner and upon the activities of the partnership. Accordingly,

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partnerships that hold our common stock, and partners in such partnerships, should consult their tax advisors.

You are urged to consult your tax advisor with respect to the application of the U.S. federal income tax laws to your particular situation, as well as any tax consequences of the ownership and disposition of our common stock arising under the U.S. federal estate or gift tax rules or under the laws of any U.S. state or local or any non-U.S. or other taxing jurisdiction or under any applicable tax treaty.

Non-U.S. Holder Defined

For purposes of this discussion, you are a non-U.S. holder if you are a beneficial owner of our common stock that is for U.S. federal income tax purposes (i) a foreign corporation or any other foreign organization taxable as a corporation for U.S. federal income tax purposes, (ii) a nonresident alien individual or (iii) a foreign estate or trust that in either case is not subject to U.S. federal income tax on a net-income basis on income or gain from a share of common stock.

Distributions

As discussed under “Dividend Policy,” above, we do not anticipate paying any dividends on our capital stock in the foreseeable future. If we were to make distributions on our common stock, those payments will constitute dividends for U.S. federal income tax purposes to the extent paid from our current or accumulated earnings and profits, as determined under U.S. federal income tax principles. To the extent those distributions exceed both our current and our accumulated earnings and profits, they will constitute a return of capital and will first reduce your basis in our common stock, but not below zero, and then will be treated as gain from the sale of stock, subject to the tax treatment described in the discussion below regarding taxable dispositions of our common stock. Any such distributions would also be subject to the discussions below regarding backup withholding and FATCA.

Subject to the discussion below regarding a dividend received by you that is effectively connected with the conduct of a U.S. trade or business, a dividend paid to you generally will be subject to U.S. withholding tax either at a rate of 30% of the gross amount of the dividend or such lower rate as may be specified by an applicable income tax treaty. In order to receive a reduced treaty rate, you must provide us with an IRS Form W-8BEN (generally including a U.S. taxpayer identification number), IRS Form W-8-BEN-E or another appropriate version of IRS Form W-8 (or a successor form), in each case, certifying qualification for the reduced rate.

Dividends received by you that are effectively connected with the conduct of a U.S. trade or business (and, if required by an applicable income tax treaty, are attributable to a permanent establishment maintained by you in the United States) generally are exempt from such withholding tax. In order to obtain this exemption, you must provide us with an IRS Form W-8ECI or successor form or other applicable IRS Form W-8 properly certifying such exemption. Such effectively connected dividends, although not subject to withholding tax, are taxed at the same graduated rates applicable to U.S. persons, net of certain deductions and credits, subject to an applicable income tax treaty providing otherwise. In addition, if you are a corporate non-U.S. holder, you may also be subject to a branch profits tax at a rate of 30% or such lower rate as may be specified by an applicable income tax treaty on your earnings and profits in respect of such effectively connected dividend income.

If you are eligible for a reduced rate of withholding tax pursuant to a tax treaty, you may be able to obtain a refund of any excess amounts currently withheld if you file an appropriate claim for refund with the IRS.

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Gain on Sale or Other Taxable Disposition of Common Stock

Subject to the discussion below regarding backup withholding and FATCA, a non-U.S. Holder generally will not be required to pay U.S. federal income tax on any gain realized upon the sale or other taxable disposition of our common stock unless:

• the gain is effectively connected with the conduct of a U.S. trade or business (and, if required by an applicable income tax treaty, the gain is attributable to a permanent establishment maintained by you in the U.S.), in which case you will be required to pay tax on the net gain derived from the sale under regular graduated U.S. federal income tax rates, and for a non-U.S. holder that is a corporation, such non-U.S. holder may be subject to the branch profits tax on any earnings and profits attributable to such gains at a 30% rate or such lower rate as may be specified by an applicable income tax treaty;

• you are an individual who is present in the United States for a period or periods aggregating 183 days or more during the calendar year in which the sale or disposition occurs and certain other conditions are met, in which case you will be required to pay a flat 30% tax on the gain derived from the sale, which tax may be offset by U.S. source capital losses in the taxable year of disposition (even though you are not considered a resident of the United States) (subject to applicable income tax or other treaties); or

• our common stock constitutes a U.S. real property interest by reason of our status as a “U.S. real property holding corporation” for U.S. federal income tax purposes, a USRPHC, at any time within the shorter of the five-year period preceding the disposition or your holding period for our common stock. We believe that we are not currently and will not become a USRPHC. However, because the determination of whether we are a USRPHC depends on the fair market value of our U.S. real property relative to the fair market value of our other business assets, there can be no assurance that we will not become a USRPHC in the future. Even if we become a USRPHC, however, as long as our common stock is regularly traded on an established securities market (as determined under the Code), such common stock will be treated as U.S. real property interests only if you actually or constructively hold more than five percent of such regularly traded common stock at any time during the applicable period that is specified in the Code.

Backup Withholding and Information Reporting

Generally, we must report annually to the IRS the amount of dividends paid to you, your name and address, and the amount of tax withheld, if any. A similar report will generally be sent to you. Pursuant to applicable income tax treaties or other agreements, the IRS may make these reports available to tax authorities in your country of residence.

Payments of dividends or of proceeds on the disposition of stock made to you may be subject to additional information reporting and backup withholding at the then applicable rate unless you establish an exemption, for example by properly certifying your non-U.S. status on an IRS Form W-8BEN, IRS Form W-8BEN-E or another appropriate version of IRS Form W-8 (or a successor form). Notwithstanding the foregoing, backup withholding and information reporting may apply if either we or our paying agent has actual knowledge, or reason to know, that you are a U.S. person.

Backup withholding is not an additional tax; rather, the U.S. income tax liability of persons subject to backup withholding will be reduced by the amount of tax withheld. If withholding results in an overpayment of taxes, a refund or credit may generally be obtained from the IRS, provided that the required information is furnished to the IRS in a timely manner.

Foreign Account Tax Compliance Act (“FATCA”)

Provisions commonly referred to as “FATCA” may impose withholding tax on certain types of payments made to “foreign financial institutions” and certain other non-U.S. entities. The legislation imposes a 30% withholding tax on dividends on, or gross proceeds from the sale or other

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disposition of, our common stock paid to a foreign financial institution or to certain non-financial foreign entities, unless (i) the foreign financial institution undertakes certain diligence and reporting obligations, (ii) the non-financial foreign entity either certifies it does not have any substantial U.S. owners or furnishes identifying information regarding each substantial U.S. owner and such entity meets certain other specified requirements or (iii) the foreign financial institution or non-financial foreign entity otherwise qualifies for an exemption from these rules. If the payee is a foreign financial institution and is subject to the requirements in (i) above, it must enter into an agreement with the U.S. Treasury requiring, among other things, that it undertake to identify accounts held by certain U.S. persons or U.S.-owned foreign entities, annually report certain information about such accounts, and withhold 30% on payments to account holders whose actions prevent it from complying with these reporting and other requirements. If the country in which a payee is resident has entered into an “intergovernmental agreement” with the United States regarding FATCA, that agreement may permit the payee to report to that country rather than to the U.S. Treasury. Under final regulations and published guidance, the obligation to withhold from payments made to a foreign financial institution or a foreign non-financial entity under the new legislation with respect to dividends on our common stock are currently in effect, but with respect to the gross proceeds of a sale or other disposition of our common stock will not begin until January 1, 2019. Prospective investors should consult their tax advisors regarding FATCA.

The preceding discussion of U.S. federal income tax considerations is for general information only. It is not tax advice. Each prospective investor should consult its own tax advisor regarding the particular U.S. federal, state and local and non-U.S. tax consequences of holding and disposing of our common stock, including the consequences of any proposed change in applicable laws.

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PLAN OF DISTRIBUTION

We and the selling stockholder are offering the shares of common stock described in this prospectus supplement through a number of underwriters. J.P. Morgan Securities LLC and Morgan Stanley & Co. LLC are acting as joint book‑running managers of the offering and as representatives of the underwriters. We and the selling stockholder have entered into an underwriting agreement with the underwriters. Subject to the terms and conditions of the underwriting agreement, we and the selling stockholder have agreed to sell to the underwriters, and each underwriter has severally agreed to purchase, at the public offering price less the underwriting discounts and commissions set forth on the cover page of this prospectus supplement, the number of shares of common stock listed next to its name in the following table:

Name	Number of Shares
J.P. Morgan Securities LLC	1,935,000
Morgan Stanley & Co. LLC	1,505,000
Robert W. Baird & Co. Inc.	215,000
Needham & Company, LLC	215,000
Raymond James & Associates, Inc.	215,000
William Blair & Company, L.L.C.	215,000
Total	4,300,000

The underwriters are committed to purchase all of the common shares offered by us and the selling stockholder if they purchase any shares. The underwriting agreement also provides that if an underwriter defaults, the purchase commitments of non-defaulting underwriters may also be increased or the offering may be terminated.

The underwriters propose to offer the common shares directly to the public at the initial public offering price set forth on the cover page of this prospectus supplement and to certain dealers at that price less a concession not in excess of $1.5105 per share. After the initial offering of the shares to the public, if all of the common shares are not sold at the initial public offering price, the underwriters may change the offering price and the other selling terms. Sales of shares made outside of the United States may be made by affiliates of the underwriters.

The underwriters have an option to purchase up to 645,000 additional shares of common stock from us to cover sales of shares by the underwriters which exceed the number of shares specified in the table above. The underwriters have 30 days from the date of this prospectus supplement to exercise this option to purchase additional shares. If any additional shares of common stock are purchased with this option, the underwriters will purchase shares in approximately the same proportion as shown in the table above. If any additional shares of common stock are purchased, the underwriters will offer the additional shares on the same terms as the shares in the table above are being offered. The selling stockholder will not receive any proceeds from the exercise of the underwriters’ option.

The underwriting fee is equal to the public offering price per share of common stock less the amount paid by the underwriters to us and the selling stockholder per share of common stock. The underwriting fee is $2.5175 per share. The following table shows the per share and total underwriting discounts and commissions to be paid to the underwriters assuming both no exercise and full exercise of the underwriters’ option to purchase additional shares.

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	Paid by Us
	Without option to purchase additional shares		With full option to purchase additional shares		Paid by the Selling Stockholder
Per Share	$	2.5175	$	2.5175	$	2.5175
Total	$	10,070,000	$	11,693,788	$	755,250

We and the selling stockholder estimate that the total expenses of this offering, including registration, filing and listing fees, printing fees and legal and accounting expenses, but excluding the underwriting discounts and commissions, will be approximately $500,000.

A prospectus supplement in electronic format may be made available on the websites maintained by one or more underwriters, or selling group members, if any, participating in the offering. The underwriters may agree to allocate a number of shares to underwriters and selling group members for sale to their online brokerage account holders. Internet distributions will be allocated by the representatives to underwriters and selling group members that may make Internet distributions on the same basis as other allocations.

We have agreed that we will not: (1) offer, pledge, sell, contract to sell, sell any option or contract to purchase, purchase any option or contract to sell, grant any option, right or warrant to purchase or otherwise dispose of, directly or indirectly, or file with the SEC a registration statement under the Securities Act relating to, any shares of our common stock or securities convertible into, or exchangeable or exercisable for, any shares of our common stock, or publicly disclose the intention to make any offer, sale, pledge, disposition or filing; or (2) enter into any swap or other arrangement that transfers all or a portion of the economic consequences associated with the ownership of any shares of common stock or any such other securities (regardless of whether any of these transactions are to be settled by the delivery of shares of common stock or such other securities, in cash or otherwise), in each case without the prior written consent of J.P. Morgan Securities LLC and Morgan Stanley & Co. LLC for a period of 90 days after the date of this prospectus supplement, other than the shares of our common stock to be sold hereunder and any shares of our common stock issued as distributions to our members or stockholders.

Our directors, executive officers and the selling stockholder have entered into lock-up agreements with the underwriters prior to the commencement of this offering pursuant to which each of these persons or entities, with limited exceptions, for a period of 90 days after the date of this prospectus supplement, may not, without the prior written consent of J.P. Morgan Securities LLC and Morgan Stanley & Co. LLC: (1) offer, pledge, sell, contract to sell, sell any option or contract to purchase, purchase any option or contract to sell, grant any option, right or warrant to purchase or otherwise transfer or dispose of, directly or indirectly, any shares of our common stock or any securities convertible into, or exercisable or exchangeable for, our common stock (including, without limitation, common stock or such other securities which may be deemed to be beneficially owned by such directors, executive officers, selling stockholder, managers and members in accordance with the rules and regulations of the SEC and securities which may be issued upon exercise of a stock option or warrant); (2) enter into any swap or other agreement that transfers, in whole or in part, any of the economic consequences of ownership of the common stock or such other securities-whether any such transaction described in clause (1) or (2) above is to be settled by delivery of common stock or such other securities, in cash or otherwise; or (3) make any demand for, or exercise any right with respect to, the registration of any shares of our common stock or any security convertible into, or exercisable or exchangeable for, our common stock.

We and the selling stockholder have agreed to indemnify the underwriters against certain liabilities, including liabilities under the Securities Act. In connection with the offering of shares of our

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common stock described in this prospectus supplement, the selling stockholder may be deemed to be an “underwriter” within the meaning of the Securities Act.

In connection with this offering, the underwriters may engage in stabilizing transactions, which involves making bids for, purchasing and selling shares of, our common stock in the open market for the purpose of preventing or retarding a decline in the market price of our common stock while this offering is in progress. These stabilizing transactions may include making short sales of our common stock, which involves the sale by the underwriters of a greater number of shares of our common stock than they are required to purchase in this offering, and purchasing shares of common stock on the open market to cover positions created by such short sales. Short sales may be “covered” shorts, which are short positions in an amount not greater than the underwriters’ option to purchase additional shares referred to above, or may be “naked” shorts, which are short positions in excess of that amount. The underwriters may close out any covered short position either by exercising their option to purchase additional shares, in whole or in part, or by purchasing shares in the open market. In making this determination, the underwriters will consider, among other things, the price of our shares of our common stock available for purchase in the open market compared to the price at which the underwriters may purchase shares through the option to purchase additional shares. A naked short position is more likely to be created if the underwriters are concerned that there may be downward pressure on the price of our common stock in the open market that could adversely affect investors who purchase in this offering. To the extent that the underwriters create a naked short position, they will purchase shares of our common stock in the open market to cover the position.

The underwriters have advised us that, pursuant to Regulation M of the Securities Act, they may also engage in other activities that stabilize, maintain or otherwise affect the price of our common stock, including the imposition of penalty bids. This means that if the representatives of the underwriters purchase our common stock in the open market in stabilizing transactions or to cover short sales, the representatives can require the underwriters that sold our common shares of our common stock as part of this offering to repay the underwriting discount received by them.

These activities may have the effect of raising or maintaining the market price of our common stock or preventing or retarding a decline in the market price of our common stock and, as a result, the price of our common stock may be higher than the price that otherwise might exist in the open market. If the underwriters commence these activities, they may discontinue them at any time. The underwriters may carry out these transactions on The  Nasdaq Global Select Market, in the over‑the‑counter market or otherwise.

In addition, in connection with this offering certain of the underwriters (and selling group members) may engage in passive market making transactions in our common stock on The Nasdaq Global Select Market prior to the pricing and completion of this offering. Passive market making consists of displaying bids on The Nasdaq Global Select Market no higher than the bid prices of independent market makers and making purchases at prices no higher than these independent bids and effected in response to order flow. Net purchases by a passive market maker on each day are generally limited to a specified percentage of the passive market maker’s average daily trading volume in our common stock during a specified period and must be discontinued when such limit is reached. Passive market making may cause the price of our common stock to be higher than the price that otherwise would exist in the open market in the absence of these transactions. If passive market making is commenced, it may be discontinued at any time.

Other than in the United States, no action has been taken by us or the underwriters that would permit a public offering of the securities offered by this prospectus supplement in any jurisdiction where action for that purpose is required. The securities offered by this prospectus supplement may not be offered or sold, directly or indirectly, nor may this prospectus supplement or any other offering material or advertisements in connection with the offer and sale of any such securities be distributed or published in any jurisdiction, except under circumstances that will result in

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compliance with the applicable rules and regulations of that jurisdiction. Persons into whose possession this prospectus supplement comes are advised to inform themselves about, and to observe, any restrictions relating to the offering and the distribution of this prospectus supplement. This prospectus supplement does not constitute an offer to sell, or a solicitation of an offer to buy, any securities offered by this prospectus supplement in any jurisdiction in which such an offer or a solicitation is unlawful.

Notice to Prospective Investors in the European Economic Area

In relation to each Member State of the European Economic Area (each, a “Relevant Member State”), no offer of shares may be made to the public in that Relevant Member State other than:

A. to any legal entity which is a qualified investor as defined in the Prospectus Directive; 

B. to fewer than 100 or, if the Relevant Member State has implemented the relevant provision of the 2010 PD Amending Directive, 150, natural or legal persons (other than qualified investors as defined in the Prospectus Directive), as permitted under the Prospectus Directive, subject to obtaining the prior consent of the representatives; or

C. in any other circumstances falling within Article 3(2) of the Prospectus Directive, provided that no such offer of shares shall require us or the representatives to publish a prospectus pursuant to Article 3 of the Prospectus Directive or supplement a prospectus pursuant to Article 16 of the Prospectus Directive.

Each person in a Relevant Member State who initially acquires any shares of our common stock or to whom any offer is made will be deemed to have represented, acknowledged and agreed that it is a “qualified investor” within the meaning of the law in that Relevant Member State implementing Article 2(1)(e) of the Prospectus Directive.  In the case of any shares being offered to a financial intermediary as that term is used in Article 3(2) of the Prospectus Directive, each such financial intermediary will be deemed to have represented, acknowledged and agreed that the shares of our common stock acquired by it in the offer have not been acquired on a non-discretionary basis on behalf of, nor have they been acquired with a view to their offer or resale to, persons in circumstances which may give rise to an offer of any shares of our common stock  to the public other than their offer or resale in a Relevant Member State to qualified investors as so defined or in circumstances in which the prior consent of the representatives has been obtained to each such proposed offer or resale.

We and the representatives and their affiliates will rely upon the truth and accuracy of the foregoing representations, acknowledgments and agreements.

This prospectus supplement has been prepared on the basis that any offer of shares of our common stock in any Relevant Member State will be made pursuant to an exemption under the Prospectus Directive from the requirement to publish a prospectus for offers of shares. Accordingly any person making or intending to make an offer in that Relevant Member State of shares of our common stock, which are the subject of the offering contemplated in this prospectus, may only do so in circumstances in which no obligation arises for us or any of the underwriters to publish a prospectus pursuant to Article 3 of the Prospectus Directive in relation to such offer.  Neither we nor the underwriters have authorized, nor do they authorize, the making of any offer of shares of our common stock in circumstances in which an obligation arises for us or the underwriters to publish a prospectus for such offer.

For the purpose of the above provisions, the expression “an offer to the public” in relation to any shares of our common stock in any Relevant Member State means the communication in any form and by any means of sufficient information on the terms of the offer and the shares of our common stock to be offered so as to enable an investor to decide to purchase or subscribe for the shares, as the same may be varied in the Relevant Member State by any measure implementing the Prospectus Directive in the Relevant Member State; the expression “Prospectus Directive” means Directive

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2003/71/EC (including the 2010 PD Amending Directive, to the extent implemented in the Relevant Member States) and includes any relevant implementing measure in the Relevant Member State; and the expression “2010 PD Amending Directive” means Directive 2010/73/EU.

Notice to Prospective Investors in the United Kingdom

In addition, in the United Kingdom, this document is being distributed only to, and is directed only at, and any offer subsequently made may only be directed at persons who are “qualified investors” (as defined in the Prospectus Directive) (1) who have professional experience in matters relating to investments falling within Article 19 (5) of the Financial Services and Markets Act 2000 (Financial Promotion) Order 2005, as amended (the “Order”) and/or (2) who are high net worth companies (or persons to whom it may otherwise be lawfully communicated) falling within Article 49(2)(a) to (d) of the Order (all such persons together being referred to as “relevant persons”). 

Any person in the United Kingdom that is not a relevant person should not act or rely on the information included in this document or use it as basis for taking any action. In the United Kingdom, any investment or investment activity that this document relates to may be made or taken exclusively by relevant persons. Any person in the United Kingdom that is not a relevant person should not act or rely on this document or any of its contents.

Certain of the underwriters and their affiliates have provided in the past to us and our affiliates, and may provide from time to time in the future, certain commercial banking, financial advisory, investment banking and other services for us and such affiliates in the ordinary course of their business, for which they have received and may continue to receive customary fees and commissions. In addition, from time to time, certain of the underwriters and their affiliates may effect transactions for their own account or the account of customers, and hold on behalf of themselves or their customers, long or short positions in our debt or equity securities or loans, and may do so in the future. In particular, an affiliate of J.P. Morgan Securities LLC is a lender under our amended and restated credit agreement and has provided its consent for this offering.

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LEGAL MATTERS

Certain legal matters relating to the shares of common stock offered hereby will be passed upon for us by Goodwin Procter LLP, Boston, Massachusetts. Certain legal matters will be passed upon for the underwriters by Skadden, Arps, Slate, Meagher & Flom LLP, Palo Alto, California.

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EXPERTS

The financial statements incorporated by reference in this prospectus and elsewhere in the registration statement have been so incorporated by reference in reliance on the reports of Grant Thornton LLP, independent registered public accountants, upon the authority of said firm as experts in auditing and accounting.

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WHERE YOU CAN FIND MORE INFORMATION

We have filed a registration statement on Form S-3 with the SEC with respect to the common stock offered by this prospectus supplement. This prospectus supplement, filed as part of the registration statement, does not contain all the information set forth in the registration statement and its exhibits and schedules, portions of which have been omitted as permitted by the rules and regulations of the SEC. For further information about us, we refer you to the registration statement and to its exhibits and schedules.

We file annual, quarterly and current reports, proxy statements and other information with the SEC. You may read and copy any document that we file at the Public Reference Room of the SEC at 100 F Street, N.E., Washington, D.C. 20549. You may obtain information on the operation of the Public Reference Room by calling the SEC at 1-800-SEC-0330. In addition, the SEC maintains a website at www.sec.gov where you can electronically access our SEC filings, including the registration statement, of which this prospectus forms a part, and its exhibits and schedules.

Any document that we file with the SEC is also available, free of charge, through the Investors section of our website, www.axon.com. Information contained on, or that can be accessed through, our website is neither part of, nor incorporated by reference into, this prospectus supplement or the accompanying prospectus. Therefore, you should not consider such information to be part of this prospectus supplement or the accompanying prospectus.

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INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

The SEC allows us to incorporate by reference into this prospectus supplement the information and reports we file with it, which means that we can disclose important information to you by referring you to these documents. The information incorporated by reference is an important part of this prospectus, and information that we file later with the SEC will automatically update and supersede the information already incorporated by reference. We are incorporating by reference the documents listed below, which we have already filed with the SEC, and any future filings we make with the SEC under Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act, including all filings made on or after the date of this prospectus supplement and prior to the termination of the offering under this prospectus and any prospectus supplement.

Notwithstanding the foregoing, we are not incorporating by reference any documents, portions of documents, exhibits or other information-including any information and related exhibits which are furnished under Item 2.02 and Item 7.01 of Current Report on Form 8-K-that is deemed to have been furnished to, rather than filed with, the SEC.

• Annual Report on Form 10-K for the fiscal year ended December 31, 2017, filed with the SEC on March 1, 2018;

• The information specifically incorporated by reference into our Annual Report on Form 10-K for the year ended December 31, 2017 from our definitive proxy statement on Schedule 14A (other than information furnished rather than filed), which was filed with the SEC on April 13, 2018;

• Quarterly Report on Form 10-Q for the quarter ended March 31, 2018, filed with the SEC on May 10, 2018;

• Current Reports on Form 8-K filed with the SEC on February 27, 2018, April 6, 2018 and May 8, 2018; and

• The description of our common stock contained in our registration statement on Form 8-A filed with the SEC on March 7, 2001 under Section 12(b) of the Exchange Act, including any amendments or reports filed for the purpose of updating such description.

Any statement made in this prospectus supplement will be deemed to be modified or superseded to the extent that any statement made in any subsequently filed document, which is incorporated by reference herein, modifies or supersedes such statement. Further, any statement made in a document so incorporated by reference also will be deemed to be modified or superseded to the extent that a subsequently filed document, which is incorporated by reference herein, modifies or supersedes such statement. Any statements, which are so modified or superseded, will not be deemed to be part of this prospectus supplement, except as so modified or superseded.

This prospectus supplement is part of a registration statement on Form S-3 filed with the SEC. This prospectus does not contain all of the information set forth in the registration statement. You should read the registration statement for further information about us.

If you write or call us, we will provide—without charge to each person, including any beneficial owner, to whom a copy of this prospectus supplement is delivered—a copy of (i) the documents incorporated by reference into this prospectus supplement but not delivered, and (ii) the exhibits, which we have specifically incorporated by reference into this prospectus supplement:

Axon Enterprise, Inc.

Attention: Corporate Secretary

17800 North 85th Street

Scottsdale, Arizona 85255

(480) 991-0797

S-27

PROSPECTUS

Axon Enterprise, Inc.

Common Stock

Preferred Stock

Debt Securities

Warrants

Units

We may from time to time issue, in one or more series or classes, common stock, preferred stock, debt securities, warrants or units. We may offer these securities separately or together in units. We will specify in the accompanying prospectus supplement the terms of the securities being offered. We may sell these securities to or through underwriters and also to other purchasers or through agents. We will set forth the names of any underwriters or agents, and any fees, conversions or discount arrangements, in the accompanying prospectus supplement. We may not sell any securities under this prospectus without delivery of the applicable prospectus supplement.

In addition, certain selling securityholders to be identified in a prospectus supplement may use this prospectus from time to time to offer shares of common stock. Specific terms of these securities will be provided in supplements to this prospectus.

You should read this document and any prospectus supplement carefully before you invest in our securities.

Our common stock is listed on The NASDAQ Global Select Market under the symbol “AAXN.”

Investing in our securities involves a high degree of risk. You should review carefully the risks and uncertainties referenced under the heading “Risk Factors” contained in this prospectus beginning on page 1 and any applicable prospectus supplement, and under similar headings in the other documents that are incorporated by reference into this prospectus.

NEITHER THE SECURITIES AND EXCHANGE COMMISSION NOR ANY STATE SECURITIES COMMISSION HAS APPROVED OR DISAPPROVED OF THESE SECURITIES OR DETERMINED IF THIS PROSPECTUS OR THE ACCOMPANYING PROSPECTUS SUPPLEMENT IS TRUTHFUL OR COMPLETE. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE

The date of this prospectus is May 14, 2018.

TABLE OF CONTENTS

	Page
Risk Factors	1
About this Prospectus	2
Cautionary Statement Regarding Forward-Looking Statements	2
The Company	3
Ratio of Earnings to Fixed Charges	4
Use of Proceeds	5
Securities We May Offer	6
Description of Capital Stock	6
Description of Debt Securities	10
Description of Warrants	17
Description of Units	19
Plan of Distribution	22
Selling Securityholders	25
Legal Matters	25
Experts	25
Where You Can Find More Information	26
Incorporation by Reference	26

RISK FACTORS

Investing in our securities involves a high degree of risk. You should carefully consider the risks described in the documents incorporated by reference in this prospectus and any prospectus supplement, as well as any other information we include or incorporate by reference into this prospectus and any applicable prospectus supplement, before making an investment decision. Our business, financial condition or results of operations could be materially adversely affected by the materialization of any of these risks. In addition, the trading price of our securities could decline due to the materialization of any of these risks, and you may lose all or part of your investment.

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ABOUT THIS PROSPECTUS

This prospectus is part of a registration statement that we filed with the Securities and Exchange Commission, or the SEC, using a “shelf” registration process. Under this shelf registration process, we may from time to time sell any combination of the securities described in this prospectus in one or more offerings. This prospectus provides you with a general description of the securities we may offer. Each time we sell securities, we will provide one or more prospectus supplements that will contain specific information about the terms of the offering. The prospectus supplement may also add, update or change information contained in this prospectus. You should read both this prospectus and the accompanying prospectus supplement together with the additional information described under the headings “Where You Can Find More Information” and “Incorporation by Reference.”

You should rely only on the information contained, or incorporated by reference, in this prospectus, any accompanying prospectus supplement or in any related free writing prospectus filed by us with the SEC. We have not authorized anyone to provide you with different information. This prospectus and the accompanying prospectus supplement do not constitute (1) an offer to sell or the solicitation of an offer to buy any securities other than the securities described in the accompanying prospectus supplement, or (2) an offer to sell or the solicitation of an offer to buy such securities in any circumstances in which such offer or solicitation is unlawful. You should assume that the information appearing in this prospectus, any prospectus supplement, the documents incorporated by reference and any related free writing prospectus is accurate only as of their respective dates. Our business, financial condition, results of operations and prospects may have changed materially since those dates.

Unless the context suggests otherwise, all references to “us,” “our,” “Axon” “we,” the “Company” and similar designations refer to Axon Enterprise, Inc. and, where appropriate, our subsidiaries.

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

This prospectus and any applicable prospectus supplement, as well as any other information we include or incorporate by reference into this prospectus and any applicable prospectus supplement, contain forward-looking statements. In some cases, you can identify these statements by forward-looking words such as “may,” “might,” “will,” “should,” “expects,” “plans,” “anticipates,” “believes,” “estimates,” “predicts,” “potential” or “continue,” the negative of these terms and other comparable terminology. These forward-looking statements, which are subject to risks, uncertainties and assumptions about us, may include projections of our future financial performance, our anticipated growth strategies and anticipated trends in our business. These statements are only predictions based on current expectations at that time and projections about future events. There are important factors that could cause our actual results, level of activity, performance or achievements to differ materially from the results, level of activity, performance or achievements expressed or implied by the forward-looking statements, including those factors described in any applicable prospectus supplement, as well as those factors discussed under the caption entitled “Risk Factors” in our (1) Annual Report on Form 10-K for the fiscal year ended December 31, 2017, (2) Quarterly Report on Form 10-Q for the quarter ended March 31, 2018 and (3) any other documents we file with the SEC that are deemed incorporated by reference into this prospectus and any applicable prospectus supplement.

Although we believe the expectations and projections reflected in the forward-looking statements are reasonable, we cannot guarantee future results, level of activity, performance or achievements. Moreover, neither we nor any other person assumes responsibility for the accuracy and completeness of any of these forward-looking statements. We are under no duty to update any of these forward-looking statements after the date of this prospectus to conform our prior statements to actual results or revised expectations. 

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THE COMPANY

Our core mission is to protect life through innovative technologies that make communities safer. We are the market leader in the development, manufacture and sale of conducted electrical weapons, or CEWs, designed for use by law enforcement, corrections, military forces, private security personnel and by private individuals for personal defense. We are also the market leader in developing, manufacturing and selling connected wearable on-officer cameras as well as developing and selling cloud-based digital evidence management software. We have established a robust network that connects devices, apps and people primarily in the law enforcement vertical market. We aim to have every public safety officer in the world carry a TASER, deploy an Axon camera and be connected to the Axon network.

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RATIO OF EARNINGS TO FIXED CHARGES

The following table sets forth our ratio of earnings to fixed charges for the periods shown. You should read this table in conjunction with the financial statements and notes incorporated by reference in this prospectus. For the periods indicated below, we had no outstanding shares of preferred stock with required dividend payments. Therefore, the ratios of earnings to fixed charges and preferred dividends are the same as the ratios of earnings to fixed charges presented below.

	Year ended December 31,					Three Months Ended March 31,
	2013	2014	2015	2016	2017	2018
Ratio of Earnings to Fixed Charges (1)	94.76x	107.29x	104.70x	52.98x	14.69x	49.84x

(1) Earnings consist of net income before income taxes. Fixed charges include any interest expense on indebtedness, interest imputed on contingent consideration related to business acquisitions, interest imputed on lease obligations and an estimate of the interest expense within rental expense.

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USE OF PROCEEDS

Unless otherwise indicated in the applicable prospectus supplement, we intend to use the net proceeds from the sale of any securities offered under this prospectus for working capital and other general corporate purposes. The amount and timing of these expenditures will vary depending on a number of factors, including competitive, market and technological developments and the rate of growth, if any, of our business. In addition, we may use a portion of the net proceeds to acquire or invest in complementary companies, product lines, products, services or technologies. However, currently, we have no understandings or agreements with respect to any such acquisition or investment.

We will have broad discretion over the uses of the net proceeds of any securities offerings and investors will be relying on the judgment of our management regarding the application of such net proceeds.

We will not receive any proceeds from the sales of securities offered by any selling securityholders under this prospectus.

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SECURITIES WE MAY OFFER

This prospectus contains summary descriptions of the securities we may offer from time to time. These summary descriptions are not meant to be complete descriptions of each security. The particular terms of any security will be described in the applicable prospectus supplement.

DESCRIPTION OF CAPITAL STOCK

The following description of our capital stock does not purport to be complete and is subject to, and qualified in its entirety by, our amended and restated certificate of incorporation and bylaws, which are exhibits to the registration statement of which this prospectus forms a part, and by applicable law, including the Delaware General Corporation Law, or the DGCL.

General

As of March 31, 2018, our authorized capital stock consisted of 225,000,000 shares of two classes of stock: 200,000,000 shares of common stock, par value $.00001 per share, and 25,000,000 shares of preferred stock, par value $.00001 per share.

Common Stock

As of March 31, 2018, there were 53,307,083 shares of our common stock outstanding. Each holder of our common stock is entitled to one vote for each share on all matters submitted to a vote of the stockholders, including the election of directors. Our stockholders do not have cumulative voting rights. Accordingly, holders of a majority of the voting shares are able to elect each class of directors. Subject to any preferences that may be applicable to any preferred stock outstanding at that time, holders of our common stock are entitled to receive dividends, if any, as may be declared from time to time by our board of directors out of legally available funds. In the event of our dissolution, holders of our common stock will be entitled to share in the net assets legally available for distribution to stockholders after the payment of all of our debts and other liabilities and the satisfaction of any liquidation preference granted to the holders of any outstanding shares of preferred stock at that time. Holders of our common stock have no preemptive, conversion, subscription or other rights, and there are no redemption or sinking fund provisions applicable to our common stock. The rights, preferences and privileges of the holders of our common stock are subject to, and may be adversely affected by, the rights of the holders of shares of any series of our preferred stock that we may designate in the future.

Preferred Stock

Our board of directors is authorized to issue shares of preferred stock in one or more series without stockholder approval. Our board of directors has the discretion to determine the rights, preferences, privileges and restrictions, including voting rights, dividend rights, conversion rights, redemption privileges and liquidation preferences, of each series of preferred stock.

The purpose of authorizing our board of directors to issue preferred stock and determine its rights and preferences is to eliminate delays associated with a stockholder vote on specific issuances. The issuance of preferred stock could adversely affect the voting power of holders of our common stock and the likelihood that such holders will receive dividend payments and payments upon liquidation. The issuance of preferred stock, while providing flexibility in connection with possible acquisitions, future financings and other corporate purposes, could have the effect of making it more difficult for a third party to acquire, or could discourage a third party from seeking to acquire, a majority of our outstanding voting stock. There are no shares of preferred stock outstanding, and we have no present plans to issue any shares of preferred stock.

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Anti-Takeover Provisions

The following paragraphs summarize certain provisions of our amended and restated certificate of incorporation, our bylaws and the DGCL. The summary does not purport to be complete and is subject to, and qualified in its entirety by reference to, the DGCL and to our amended and restated certificate of incorporation and bylaws. Copies of these documents are on file with the SEC and are exhibits to the registration statement of which this prospectus forms a part. See “Where You Can Find More Information” and “Incorporation By Reference.”

Our amended and restated certificate of incorporation and bylaws contain certain provisions that could have the effect of delaying, deterring or preventing another party—whether friendly or hostile—from acquiring control over us. These provisions and certain provisions of Delaware law, which are summarized below, are expected to discourage coercive takeover practices and inadequate takeover bids. These provisions are also designed, in part, to encourage persons seeking to acquire control of us to negotiate first with our board of directors. We believe that the benefits of increased protection of our potential ability to negotiate more favorable terms with an unfriendly or unsolicited acquirer outweigh the disadvantages of discouraging a proposal to acquire us.

Amendment of Amended and Restated Certificate of Incorporation and Bylaws

The amendment or repeal of our amended and restated certificate of incorporation requires approval of the holders of 75% of the voting power of the then-outstanding shares of capital stock entitled to vote thereon, or the Voting Stock, voting together as a single class. Further, unless otherwise specified, amendment or repeal of our bylaws requires the approval of not less than 66.67% of the Voting Stock, voting together as a single class.

Board Classification

Our board of directors is divided into three classes, one class of which is elected each year by our stockholders. The directors in each class will serve for a three-year term. A third party may be discouraged from making a tender offer or otherwise attempting to obtain control of us because it is more difficult and time-consuming for stockholders to replace a majority of the directors on a classified board. Further, the approval of 66.76% of the Voting Stock, voting together as a single class, is necessary to amend or repeal, or adopt any provision inconsistent with, the classification of our board of directors as set forth in our bylaws.

Limits on Ability of Stockholders to Act by Written Consent

Our bylaws contains provisions that limit the ability of stockholders to act by written consent when the solicitation of stockholder action by written consent is not at the direction of our board of directors. These limitations do not apply to solicitations of stockholder action by written consent at the direction of our board of directors. These limitations, in general, concern the subject matter of the requested stockholder action, notice and ownership requirements applicable to stockholders seeking action by written consent, manner of solicitation, the timeliness and procedures for delivery of the written consents and the certification and effectiveness of such consents. The ownership requirements establish that, at a minimum, holders of record representing 20% of the outstanding shares of common stock of the Company are needed to request that a record date be fixed to take action by written consent when the solicitation is not at the direction of our board of directors. Further, when such solicitation is not at the direction of our board of directors, the subject matter of the requested action cannot concern an identical or substantially similar item of stockholder action that was presented at a meeting of stockholders held in the12 months prior to the request for a record date or the election or removal of directors under certain conditions.

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Limits on Ability of Stockholders to Call a Special Meeting

Our bylaws contains provisions that limit the ability of stockholders to call a special meeting. Unless otherwise specified by our amended and restated certificate of incorporation or the DGCL, special meetings of the stockholders may only be called and proposed by the Chairman of the Board, Chief Executive Officer, the holder of a majority of the voting power of the Voting Stock, or the board of directors pursuant to a resolution adopted by a majority of the then-authorized number of directors.

Requirements for Advance Notification of Stockholder Business, Nominations and Proposals

Our bylaws establish advance notice procedures for any business proposed by stockholders, including nominations of persons to be elected as a director or other proposals to be adopted by the Company, to be considered at an annual meeting of stockholders. These bylaw provisions may have the effect of precluding the conduct of certain stockholder business at the annual meeting if proper procedures are not followed. These provisions may also discourage or deter a potential acquirer from conducting a solicitation of proxies to elect the acquirer’s own slate of directors or otherwise attempting to obtain control of our company. Further, the approval of 66.67% of the Voting Stock, voting together as a single class, is necessary to amend these bylaw provisions.

No Cumulative Voting

Our amended and restated certificate of incorporation does not permit cumulative voting in the election of directors. Cumulative voting allows a stockholder to vote a portion or all of its shares for one or more candidates for seats on the board of directors. Without cumulative voting, a minority stockholder may not be able to gain as many seats on our board of directors as the stockholder would be able to gain if cumulative voting were permitted. The absence of cumulative voting makes it more difficult for a minority stockholder to gain a seat on our board of directors to influence our board’s decision regarding a takeover.

Preferred Stock

In addition, the authorization of undesignated preferred stock makes it possible for our board of directors to issue preferred stock with voting or other rights or preferences that could impede the success of any attempt to change our control.

Removal of Directors and Vacancy in the Board of Directors

Our amended and restated certificate of incorporation provides that a director may be removed from office before the expiration date of that director’s term of office, with or without cause, only by an affirmative vote of the holders of 66.67% of the Voting Stock, voting together as a single class. Any vacancy on our board of directors, including a vacancy resulting from any increase in the authorized number of directors, may be filled by no less than a majority vote of the remaining directors then in office.

Delaware Anti-Takeover Statute

We are subject to the provisions of Section 203 of the DGCL regulating corporate takeovers. In general, Section 203 prohibits a publicly held Delaware corporation from engaging, under certain circumstances, in a business combination with an interested stockholder for a period of three years following the date the person became an interested stockholder unless:

• prior to the date of the transaction, our board of directors approved either the business combination or the transaction which resulted in the stockholder becoming an interested stockholder;

• upon completion of the transaction that resulted in the stockholder becoming an interested stockholder, the interested stockholder owned at least 85% of the voting stock of the

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corporation outstanding at the time the transaction commenced, calculated as provided under Section 203; or

• at, or subsequent to, the date of the transaction, the business combination is approved by our board of directors and authorized at an annual or special meeting of stockholders, and not by written consent, by the affirmative vote of at least two-thirds of the outstanding voting stock which is not owned by the interested stockholder.

Generally, a business combination includes a merger, asset or stock sale, or other transaction resulting in a financial benefit to the interested stockholder. An interested stockholder is a person who, together with affiliates and associates, owns or, within three years prior to the determination of interested stockholder status did own, 15% or more of a corporation’s outstanding voting stock. We expect the existence of this provision to have an anti-takeover effect with respect to transactions our board of directors does not approve in advance. We also anticipate that Section 203 may discourage attempts that might result in a premium over the market price for the shares of common stock held by stockholders.

Transfer Agent and Registrar

The transfer agent and registrar for our common stock is Broadridge Corporate Issuer Solutions. The address of the transfer agent and registrar 51 Mercedes Way Edgewood, NY 11717.

Listing

Our common stock is listed on The NASDAQ Global Select Market under the symbol “AAXN.”

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DESCRIPTION OF DEBT SECURITIES

This section describes the general terms and provisions of our debt securities that we may issue from time to time. We may issue debt securities, in one or more series, as either senior or subordinated debt or as senior or subordinated convertible debt. While the terms we have summarized below will apply generally to any future debt securities we may offer under this prospectus, the applicable prospectus supplement or free writing prospectus will describe the specific terms of any debt securities offered through that prospectus supplement or free writing prospectus. The terms of any debt securities we offer under a prospectus supplement or free writing prospectus may differ from the terms we describe below. Unless the context requires otherwise, whenever we refer to the “indentures,” we also are referring to any supplemental indentures that specify the terms of a particular series of debt securities.

We will issue any senior debt securities under the senior indenture that we will enter into with the trustee named in the senior indenture. We will issue any subordinated debt securities under the subordinated indenture that we will enter into with the trustee named in the subordinated indenture. We have filed forms of these documents as exhibits to the registration statement, of which this prospectus is a part. Supplemental indentures and forms of debt securities containing the terms of the debt securities being offered will be filed as exhibits to the registration statement of which this prospectus is a part or will be incorporated by reference from reports that we file with the SEC.

The indentures will be qualified under the Trust Indenture Act of 1939, as amended, or the Trust Indenture Act. We use the term “trustee” to refer to either the trustee under the senior indenture or the trustee under the subordinated indenture, as applicable.

The following summaries of material provisions of the senior debt securities, the subordinated debt securities and the indentures are subject to, and qualified in their entirety by reference to, all of the provisions of the indenture applicable to a particular series of debt securities. We urge you to read the applicable prospectus supplement or free writing prospectus and any related free writing prospectuses related to the debt securities that we may offer under this prospectus, as well as the complete applicable indenture that contains the terms of the debt securities. Except as we may otherwise indicate, the terms of the senior indenture and the subordinated indenture are identical.

General

We will describe in the applicable prospectus supplement or free writing prospectus the terms of the series of debt securities being offered, including:

• the title;

• the principal amount being offered, and if a series, the total amount authorized and the total amount outstanding;

• any limit on the amount that may be issued;

• whether or not we will issue the series of debt securities in global form, and, if so, the terms and who the depository will be;

• the maturity date;

• whether and under what circumstances, if any, we will pay additional amounts on any debt securities held by a person who is not a United States person for tax purposes, and whether we can redeem the debt securities if we have to pay such additional amounts;

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• the annual interest rate, which may be fixed or variable, or the method for determining the rate and the date interest will begin to accrue, the dates interest will be payable and the regular record dates for interest payment dates or the method for determining such dates;

• whether or not the debt securities will be secured or unsecured, and the terms of any secured debt;

• the terms of the subordination of any series of subordinated debt;

• the place where payments will be payable;

• the restrictions on transfer, sale or other assignment, if any;

• our right, if any, to defer payment of interest and the maximum length of any such deferral period;

• the date, if any, after which, the conditions upon which, and the price at which, we may, at our option, redeem the series of debt securities pursuant to any optional or provisional redemption provisions and the terms of those redemption provisions;

• the date, if any, on which, and the price at which we are obligated, pursuant to any mandatory sinking fund or analogous fund provisions or otherwise, to redeem, or at the holder’s option, to purchase, the series of debt securities and the currency or currency unit in which the debt securities are payable;

• whether the indenture will restrict our ability or the ability of our subsidiaries to:

• incur additional indebtedness;

• issue additional securities;

• create liens;

• pay dividends or make distributions in respect of our capital stock or the capital stock of our subsidiaries;

• redeem capital stock;

• place restrictions on our subsidiaries’ ability to pay dividends, make distributions or transfer assets;

• make investments or other restricted payments;

• sell or otherwise dispose of assets;

• enter into sale-leaseback transactions;

• engage in transactions with stockholders or affiliates;

• issue or sell stock of our subsidiaries; or

• effect a consolidation or merger;

• whether the indenture will require us to maintain any interest coverage, fixed charge, cash flow-based, asset-based or other financial ratios;

• a discussion of certain material or special United States federal income tax considerations applicable to the debt securities;

• any information describing any book-entry features;

• the provisions for a sinking fund purchase or other analogous fund, if any;

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• the applicability of the provisions in the indenture on discharge;

• whether the debt securities are to be offered at a price such that they will be deemed to be offered at an “original issue discount” as defined in paragraph (a) of Section 1273 of the Internal Revenue Code of 1986, as amended;

• the denominations in which we will issue the series of debt securities, if other than denominations of $1,000 and any integral multiple thereof;

• the currency of payment of debt securities if other than U.S. dollars and the manner of determining the equivalent amount in U.S. dollars; and

• any other specific terms, preferences, rights or limitations of, or restrictions on, the debt securities, including any additional events of default or covenants provided with respect to the debt securities, and any terms that may be required by us or advisable under applicable laws or regulations or advisable in connection with the marketing of the debt securities.

Conversion or Exchange Rights

We will set forth in the applicable prospectus supplement or free writing prospectus the terms on which a series of debt securities may be convertible into, or exchangeable for, our common stock, our preferred stock or other securities (including securities of a third-party). We will include provisions as to whether conversion or exchange is mandatory, at the option of the holder or at our option. We may include provisions pursuant to which the number of shares of our common stock, our preferred stock or other securities (including securities of a third-party) that the holders of the series of debt securities receive would be subject to adjustment.

Consolidation, Merger or Sale

Unless we provide otherwise in the prospectus supplement or free writing prospectus applicable to a particular series of debt securities, the indentures will not contain any covenant that restricts our ability to merge or consolidate, or sell, convey, transfer or otherwise dispose of all or substantially all of our assets. However, any successor to, or acquirer of, such assets must assume all of our obligations under the indentures or the debt securities, as appropriate. If the debt securities are convertible into, or exchangeable for, other securities of ours or securities of other entities, the person with whom we consolidate or merge or to whom we sell all of our property must make provisions for the conversion of the debt securities into securities that the holders of the debt securities would have received if they had converted the debt securities before the consolidation, merger or sale.

Events of Default Under the Indenture

Unless we provide otherwise in the prospectus supplement or free writing prospectus applicable to a particular series of debt securities, the following are events of default under the indentures with respect to any series of debt securities that we may issue:

• if we fail to pay interest when due and payable and our failure continues for 90 days and the time for payment has not been extended;

• if we fail to pay the principal, premium or sinking fund payment, if any, when due and payable at maturity, upon redemption or repurchase or otherwise, and the time for payment has not been extended;

• if we fail to observe or perform any other covenant contained in the debt securities or the indentures, other than a covenant specifically relating to another series of debt securities, and our failure continues for 90 days after we receive notice from the trustee or holders of at least 25% in aggregate principal amount of the outstanding debt securities of the applicable series; and

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• if specified events of bankruptcy, insolvency or reorganization occur.

We will describe in each applicable prospectus supplement or free writing prospectus any additional events of default relating to the relevant series of debt securities.

If an event of default with respect to debt securities of any series occurs and is continuing, other than an event of default specified in the last bullet point above, the trustee or the holders of at least 25% in aggregate principal amount of the outstanding debt securities of that series, by notice to us in writing, and to the trustee if notice is given by such holders, may declare the unpaid principal, premium, if any, and accrued interest, if any, due and payable immediately. If an event of default specified in the last bullet point above occurs with respect to us, the unpaid principal, premium, if any, and accrued interest, if any, of each issue of debt securities then outstanding shall be due and payable without any notice or other action on the part of the trustee or any holder.

The holders of a majority in principal amount of the outstanding debt securities of an affected series may waive any default or event of default with respect to the series and its consequences, except defaults or events of default regarding payment of principal, premium, if any, or interest, unless we have cured the default or event of default in accordance with the indenture. Any waiver shall cure the default or event of default.

Subject to the terms of the indentures, if an event of default under an indenture shall occur and be continuing, the trustee will be under no obligation to exercise any of its rights or powers under such indenture at the request or direction of any of the holders of the applicable series of debt securities, unless such holders have offered the trustee reasonable indemnity or security satisfactory to it against any loss, liability or expense. The holders of a majority in principal amount of the outstanding debt securities of any series will have the right to direct the time, method and place of conducting any proceeding for any remedy available to the trustee, or exercising any trust or power conferred on the trustee, with respect to the debt securities of that series, provided that:

• the direction so given by the holder is not in conflict with any law or the applicable indenture; and

• subject to its duties under the Trust Indenture Act, the trustee need not take any action that might involve it in personal liability or might be unduly prejudicial to the holders not involved in the proceeding.

A holder of the debt securities of any series will have the right to institute a proceeding under the indentures or to appoint a receiver or trustee, or to seek other remedies if:

•  the holder has given written notice to the trustee of a continuing event of default with respect to that series;

• the holders of at least 25% in aggregate principal amount of the outstanding debt securities of that series have made written request, and such holders have offered reasonable indemnity, to the trustee or security satisfactory to it against any loss, liability or expense or to be incurred in compliance with instituting the proceeding as trustee; and

• the trustee does not institute the proceeding, and does not receive from the holders of a majority in aggregate principal amount of the outstanding debt securities of that series other conflicting directions within 90 days after the notice, request and offer.

These limitations do not apply to a suit instituted by a holder of debt securities if we default in the payment of the principal, premium, if any, or interest on, the debt securities, or other defaults that may be specified in the applicable prospectus supplement or free writing prospectus.

We will periodically file statements with the trustee regarding our compliance with specified covenants in the indentures.

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Modification of Indenture; Waiver

Subject to the terms of the indenture for any series of debt securities that we may issue, we and the trustee may change an indenture without the consent of any holders with respect to the following specific matters:

• to fix any ambiguity, defect or inconsistency in the indenture;

• to comply with the provisions described above under “Description of Our Debt Securities—Consolidation, Merger or Sale;”

• to comply with any requirements of the SEC in connection with the qualification of any indenture under the Trust Indenture Act;

• to add to, delete from or revise the conditions, limitations and restrictions on the authorized amount, terms or purposes of issue, authentication and delivery of debt securities, as set forth in the indenture;

• to provide for the issuance of, and establish the form and terms and conditions of, the debt securities of any series as provided under “Description of Our Debt Securities—General,” to establish the form of any certifications required to be furnished pursuant to the terms of the indenture or any series of debt securities, or to add to the rights of the holders of any series of debt securities;

• to evidence and provide for the acceptance of appointment hereunder by a successor trustee;

• to provide for uncertificated debt securities and to make all appropriate changes for such purpose;  

• to add to our covenants such new covenants, restrictions, conditions or provisions for the benefit of the holders, to make the occurrence, or the occurrence and the continuance, of a default in any such additional covenants, restrictions, conditions or provisions an event of default or to surrender any right or power conferred to us in the indenture; or

• to change anything that does not materially adversely affect the interests of any holder of debt securities of any series.

In addition, under the indentures, the rights of holders of a series of debt securities may be changed by us and the trustee with the written consent of the holders of at least a majority in aggregate principal amount of the outstanding debt securities of each series that is affected. However, subject to the terms of the indenture for any series of debt securities that we may issue or as otherwise provided in the prospectus supplement or free writing prospectus applicable to a particular series of debt securities, we and the trustee may make the following changes only with the consent of each holder of any outstanding debt securities affected:

• extending the stated maturity of the series of debt securities;

• reducing the principal amount, reducing the rate of or extending the time of payment of interest, or reducing any premium payable upon the redemption or repurchase of any debt securities; or

• reducing the percentage of debt securities, the holders of which are required to consent to any amendment, supplement, modification or waiver.

Discharge

Each indenture provides that, subject to the terms of the indenture and any limitation otherwise provided in the prospectus supplement or free writing prospectus applicable to a particular series of

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debt securities, we can elect to be discharged from our obligations with respect to one or more series of debt securities, except for specified obligations, including obligations to:

• register the transfer or exchange of debt securities of the series; 

• replace stolen, lost or mutilated debt securities of the series;

• maintain paying agencies;

• hold monies for payment in trust;

• recover excess money held by the trustee;

• compensate and indemnify the trustee; and

• appoint any successor trustee.

In order to exercise our rights to be discharged, we must deposit with the trustee money or government obligations sufficient to pay all the principal of, any premium and interest on, the debt securities of the series on the dates payments are due.

Form, Exchange and Transfer

We will issue the debt securities of each series only in fully registered form without coupons and, unless we otherwise specify in the applicable prospectus supplement or free writing prospectus, in denominations of $1,000 and any integral multiple thereof. The indentures provide that we may issue debt securities of a series in temporary or permanent global form and as book-entry securities that will be deposited with, or on behalf of, The Depository Trust Company or another depository named by us and identified in a prospectus supplement or free writing prospectus with respect to that series.

At the option of the holder, subject to the terms of the indentures and the limitations applicable to global securities described in the applicable prospectus supplement or free writing prospectus, the holder of the debt securities of any series can exchange the debt securities for other debt securities of the same series, in any authorized denomination and of like tenor and aggregate principal amount.

Subject to the terms of the indentures and the limitations applicable to global securities set forth in the applicable prospectus supplement or free writing prospectus, holders of the debt securities may present the debt securities for exchange or for registration of transfer, duly endorsed or with the form of transfer endorsed thereon duly executed if so required by us or the security registrar, at the office of the security registrar or at the office of any transfer agent designated by us for this purpose. Unless otherwise provided in the debt securities that the holder presents for transfer or exchange, we will make no service charge for any registration of transfer or exchange, but we may require payment of any taxes or other governmental charges.

We will name in the applicable prospectus supplement or free writing prospectus the security registrar, and any transfer agent in addition to the security registrar, that we initially designate for any debt securities. We may at any time designate additional transfer agents or rescind the designation of any transfer agent or approve a change in the office through which any transfer agent acts, except that we will be required to maintain a transfer agent in each place of payment for the debt securities of each series. If we elect to redeem the debt securities of any series, we will not be required to:

• issue, register the transfer of, or exchange any debt securities of that series during a period beginning at the opening of business 15 days before the day of mailing of a notice of redemption of any debt securities that may be selected for redemption and ending at the close of business on the day of the mailing; or

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• register the transfer of, or exchange, any debt securities so selected for redemption, in whole or in part, except the unredeemed portion of any debt securities we are redeeming in part.

Information Concerning the Trustee

The trustee, other than during the occurrence and continuance of an event of default under an indenture, undertakes to perform only those duties as are specifically set forth in the applicable indenture. Upon an event of default under an indenture, the trustee must use the same degree of care as a prudent person would exercise or use in the conduct of his or her own affairs.

Subject to this provision, the trustee is under no obligation to exercise any of the powers given it by the indentures at the request of any holder of debt securities unless it is offered reasonable security and indemnity against the costs, expenses and liabilities that it might incur.

Payment and Paying Agents

Unless we otherwise indicate in the applicable prospectus supplement or free writing prospectus, we will make payment of the interest on any debt securities on any interest payment date to the person in whose name the debt securities, or one or more predecessor securities, are registered at the close of business on the regular record date for the interest.

We will pay principal of and any premium and interest on the debt securities of a particular series at the office of the paying agents designated by us, except that unless we otherwise indicate in the applicable prospectus supplement or free writing prospectus, we will make interest payments by check that we will mail to the holder or by wire transfer to certain holders. Unless we otherwise indicate in the applicable prospectus supplement or free writing prospectus, we will designate the corporate trust office of the trustee as our sole paying agent for payments with respect to debt securities of each series. We will name in the applicable prospectus supplement or free writing prospectus any other paying agents that we initially designate for the debt securities of a particular series. We will maintain a paying agent in each place of payment for the debt securities of a particular series.

All money we pay to a paying agent or the trustee for the payment of the principal of or any premium or interest on any debt securities that remains unclaimed at the end of two years after such principal, premium or interest has become due and payable will be repaid to us, and the holder of the debt security thereafter may look only to us for payment thereof.

Governing Law

The indentures and the debt securities will be governed by and construed in accordance with the laws of the State of New York, except to the extent that the Trust Indenture Act is applicable.

Ranking of Debt Securities

The subordinated debt securities will be subordinate and junior in priority of payment to certain of our other indebtedness to the extent described in a prospectus supplement or free writing prospectus. The subordinated indenture does not limit the amount of subordinated debt securities that we may issue. It also does not limit us from issuing any other secured or unsecured debt.

The senior debt securities will rank equally in right of payment to all our other senior unsecured debt. The senior indenture does not limit the amount of senior debt securities that we may issue. It also does not limit us from issuing any other secured or unsecured debt.

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DESCRIPTION OF WARRANTS

The following description, together with the additional information we may include in any applicable prospectus supplements, summarizes the material terms and provisions of the warrants that we may offer under this prospectus and the related warrant agreements and warrant certificates. While the terms summarized below will apply generally to any warrants that we may offer, we will describe the particular terms of any series of warrants in more detail in the applicable prospectus supplement. If we indicate in the prospectus supplement, the terms of any warrants offered under that prospectus supplement may differ from the terms described below. Specific warrant agreements will contain additional important terms and provisions and will be incorporated by reference as an exhibit to the registration statement, which includes this prospectus.

General

We may issue warrants for the purchase of common stock, preferred stock and/or debt securities in one or more series. We may issue warrants independently or together with common stock, preferred stock and/or debt securities, and the warrants may be attached to or separate from these securities.

We will evidence each series of warrants by warrant certificates that we will issue under a separate warrant agreement. We will enter into the warrant agreement with a warrant agent. We will indicate the name and address of the warrant agent in the applicable prospectus supplement relating to a particular series of warrants.

We will describe in the applicable prospectus supplement the terms of the series of warrants, including:

• the offering price and aggregate number of warrants offered;

• the currency for which the warrants may be purchased;

• if applicable, the designation and terms of the securities with which the warrants are issued and the number of warrants issued with each such security or each principal amount of such security;

• if applicable, the date on and after which the warrants and the related securities will be separately transferable;  

• in the case of warrants to purchase debt securities, the principal amount of debt securities purchasable upon exercise of one warrant and the price at, and currency in which, this principal amount of debt securities may be purchased upon such exercise;

• in the case of warrants to purchase common stock or preferred stock, the number of shares of common stock or preferred stock, as the case may be, purchasable upon the exercise of one warrant and the price at which these shares may be purchased upon such exercise;

• the effect of any merger, consolidation, sale or other disposition of our business on the warrant agreement and the warrants;

• the terms of any rights to redeem or call the warrants;

• any provisions for changes to, or adjustments in, the exercise price or number of securities issuable upon exercise of the warrants;

• the periods during which, and places at which, the warrants are exercisable;

• the manner of exercise;

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• the dates on which the right to exercise the warrants will commence and expire;

• the manner in which the warrant agreement and warrants may be modified;

• the federal income tax consequences of holding or exercising the warrants;

• the terms of the securities issuable upon exercise of the warrants; and

• any other specific terms, preferences, rights or limitations of, or restrictions on, the warrants.

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DESCRIPTION OF UNITS

We may issue units comprised of shares of common stock, shares of preferred stock, debt securities and warrants in any combination. We may issue units in such amounts and in as many distinct series as we wish. This section outlines certain provisions of the units that we may issue. If we issue units, they will be issued under one or more unit agreements to be entered into between us and a bank or other financial institution, as unit agent. The information described in this section may not be complete in all respects and is qualified entirely by reference to the unit agreement with respect to the units of any particular series. The specific terms of any series of units offered will be described in the applicable prospectus supplement. If so described in a particular supplement, the specific terms of any series of units may differ from the general description of terms presented below. We urge you to read any prospectus supplement related to any series of units we may offer, as well as the complete unit agreement and unit certificate that contain the terms of the units. If we issue units, forms of unit agreements and unit certificates relating to such units will be incorporated by reference as exhibits to the registration statement, which includes this prospectus.

Each unit that we may issue will be issued so that the holder of the unit is also the holder of each security included in the unit. Thus, the holder of a unit will have the rights and obligations of a holder of each included security. The unit agreement under which a unit is issued may provide that the securities included in the unit may not be held or transferred separately, at any time or at any time before a specified date. The applicable prospectus supplement may describe:

• the designation and terms of the units and of the securities comprising the units, including whether and under what circumstances those securities may be held or transferred separately;

• any provisions of the governing unit agreement;

• the price or prices at which such units will be issued;

• the applicable United States federal income tax considerations relating to the units;

• any provisions for the issuance, payment, settlement, transfer or exchange of the units or of the securities comprising the units; and

• any other terms of the units and of the securities comprising the units.

The provisions described in this section, as well as those described under “Description of Capital Stock,” “Description of Debt Securities” and “Description of Warrants” will apply to the securities included in each unit, to the extent relevant and as may be updated in any prospectus supplements.

Issuance in Series

We may issue units in such amounts and in as many distinct series as we wish. This section summarizes terms of the units that apply generally to all series. Most of the financial and other specific terms of a particular series of units will be described in the applicable prospectus supplement.

Unit Agreements

We will issue the units under one or more unit agreements to be entered into between us and a bank or other financial institution, as unit agent. We may add, replace or terminate unit agents from time to time. We will identify the unit agreement under which each series of units will be issued and the unit agent under that agreement in the applicable prospectus supplement.

The following provisions will generally apply to all unit agreements unless otherwise stated in the applicable prospectus supplement:

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Modification without Consent

We and the applicable unit agent may amend any unit or unit agreement without the consent of any holder:

• to cure any ambiguity; any provisions of the governing unit agreement that differ from those described below;

• to correct or supplement any defective or inconsistent provision; or

• to make any other change that we believe is necessary or desirable and will not adversely affect the interests of the affected holders in any material respect.

We do not need any approval to make changes that affect only units to be issued after the changes take effect. We may also make changes that do not adversely affect a particular unit in any material respect, even if they adversely affect other units in a material respect. In those cases, we do not need to obtain the approval of the holder of the unaffected unit; we need only obtain any required approvals from the holders of the affected units.

Modification with Consent

We may not amend any particular unit or a unit agreement with respect to any particular unit unless we obtain the consent of the holder of that unit, if the amendment would:

• impair any right of the holder to exercise or enforce any right under a security included in the unit if the terms of that security require the consent of the holder to any changes that would impair the exercise or enforcement of that right; or

• reduce the percentage of outstanding units or any series or class the consent of whose holders is required to amend that series or class, or the applicable unit agreement with respect to that series or class, as described below.

Any other change to a particular unit agreement and the units issued under that agreement would require the following approval:

• If the change affects only the units of a particular series issued under that agreement, the change must be approved by the holders of a majority of the outstanding units of that series; or

• If the change affects the units of more than one series issued under that agreement, it must be approved by the holders of a majority of all outstanding units of all series affected by the change, with the units of all the affected series voting together as one class for this purpose.

These provisions regarding changes with majority approval also apply to changes affecting any securities issued under a unit agreement, as the governing document.

In each case, the required approval must be given by written consent.

Unit Agreements Will Not Be Qualified under Trust Indenture Act

No unit agreement will be qualified as an indenture, and no unit agent will be required to qualify as a trustee, under the Trust Indenture Act. Therefore, holders of units issued under unit agreements will not have the protections of the Trust Indenture Act with respect to their units.

Mergers and Similar Transactions Permitted; No Restrictive Covenants or Events of Default

The unit agreements will not restrict our ability to merge or consolidate with, or sell our assets to, another corporation or other entity or to engage in any other transactions. If at any time we merge or consolidate with, or sell our assets substantially as an entirety to, another corporation or other entity, the successor entity will succeed to and assume our obligations under the unit agreements. We will then be relieved of any further obligation under these agreements.

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The unit agreements will not include any restrictions on our ability to put liens on our assets, nor will they restrict our ability to sell our assets. The unit agreements also will not provide for any events of default or remedies upon the occurrence of any events of default.

Governing Law

The unit agreements and the units will be governed by Delaware law.

Form, Exchange and Transfer

We will issue each unit in global—i.e., book-entry—form only. Units in book-entry form will be represented by a global security registered in the name of a depositary, which will be the holder of all the units represented by the global security. Those who own beneficial interests in a unit will do so through participants in the depositary’s system, and the rights of these indirect owners will be governed solely by the applicable procedures of the depositary and its participants. We will describe book-entry securities, and other terms regarding the issuance and registration of the units in the applicable prospectus supplement.

Each unit and all securities comprising the unit will be issued in the same form.

If we issue any units in registered, non-global form, the following will apply to them:

• The units will be issued in the denominations stated in the applicable prospectus supplement. Holders may exchange their units for units of smaller denominations or combined into fewer units of larger denominations, as long as the total amount is not changed.

• Holders may exchange or transfer their units at the office of the unit agent. Holders may also replace lost, stolen, destroyed or mutilated units at that office. We may appoint another entity to perform these functions or perform them ourselves.

• Holders will not be required to pay a service charge to transfer or exchange their units, but they may be required to pay for any tax or other governmental charge associated with the transfer or exchange. The transfer or exchange, and any replacement, will be made only if our transfer agent is satisfied with the holder’s proof of legal ownership. The transfer agent may also require an indemnity before replacing any units.

• If we have the right to redeem, accelerate or settle any units before their maturity, and we exercise our right as to less than all those units or other securities, we may block the exchange or transfer of those units during the period beginning 15 days before the day we mail the notice of exercise and ending on the day of that mailing, in order to freeze the list of holders to prepare the mailing. We may also refuse to register transfers of or exchange any unit selected for early settlement, except that we will continue to permit transfers and exchanges of the unsettled portion of any unit being partially settled. We may also block the transfer or exchange of any unit in this manner if the unit includes securities that are or may be selected for early settlement.

Only the depositary will be entitled to transfer or exchange a unit in global form, since it will be the sole holder of the unit.

Payments and Notices

In making payments and giving notices with respect to our units, we will follow the procedures as described in the applicable prospectus supplement.

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PLAN OF DISTRIBUTION

We may sell securities:

• through underwriters;

• through dealers;

• through agents;

• directly to purchasers; or

• through a combination of any of these methods or any other method permitted by law.

In addition, we may issue the securities as a dividend or distribution or in a subscription rights offering to our existing security holders.

We may directly solicit offers to purchase securities, or agents may be designated to solicit such offers. In the prospectus supplement relating to such offering, we will name any agent that could be viewed as an underwriter under the Securities Act and describe any commissions that we must pay to any such agent. Any such agent will be acting on a best efforts basis for the period of its appointment or, if indicated in the applicable prospectus supplement, on a firm commitment basis. This prospectus may be used in connection with any offering of our securities through any of these methods or other methods described in the applicable prospectus supplement.

The distribution of the securities may be effected from time to time in one or more transactions:

• at a fixed price, or prices which may be changed from time to time;

• at market prices prevailing at the time of sale;

• at prices related to such prevailing market prices; or

• at negotiated prices.

Each prospectus supplement will describe the method of distribution of the securities and any applicable restrictions.

The prospectus supplement with respect to the securities of a particular series will describe the terms of the offering of the securities, including the following:

• the name of the agent or any underwriters;

• the public offering or purchase price;

• any discounts and commissions to be allowed or paid to the agent or underwriters;

• all other items constituting underwriting compensation;

• any discounts and commissions to be allowed or paid to dealers; and

• any exchanges on which the securities will be listed.

If any underwriters or agents are used in the sale of the securities in respect of which this prospectus is delivered, we will enter into an underwriting agreement, sales agreement or other agreement with them at the time of sale to them, and we will set forth in the prospectus supplement relating to such offering the names of the underwriters or agents and the terms of the related agreement with them.

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In connection with the offering of securities, we may grant to the underwriters an option to purchase additional securities with an additional underwriting commission, as may be set forth in the accompanying prospectus supplement. If we grant any such option, the terms of such option will be set forth in the prospectus supplement for such securities.

If a dealer is used in the sale of the securities in respect of which the prospectus is delivered, we will sell such securities to the dealer, as principal. The dealer, who may be deemed to be an “underwriter” as that term is defined in the Securities Act, may then resell such securities to the public at varying prices to be determined by such dealer at the time of resale.

If we offer securities in a subscription rights offering to our existing security holders, we may enter into a standby underwriting agreement with dealers, acting as standby underwriters. We may pay the standby underwriters a commitment fee for the securities they commit to purchase on a standby basis. If we do not enter into a standby underwriting arrangement, we may retain a dealer-manager to manage a subscription rights offering for us.

Agents, underwriters, dealers and other persons may be entitled into to indemnification by us against certain civil liabilities, including liabilities under the Securities Act, and may be customers of, engage in transactions with, or perform services for, us in the ordinary course of business.

If so indicated in the applicable prospectus supplement, we will authorize underwriters or other persons acting as our agents to solicit offers by certain institutions to purchase securities from us pursuant to delayed delivery contracts providing for payment and delivery on the date stated in the prospectus supplement. Each contract will be for an amount not less than, and the aggregate amount of securities sold pursuant to such contracts shall not be less nor more than, the respective amounts stated in the prospectus supplement. Institutions with whom the contracts, when authorized, may be made include commercial and savings banks, insurance companies, pension funds, investment companies, educational and charitable institutions and other institutions, but shall in all cases be subject to our approval. Delayed delivery contracts will not be subject to any conditions except that:

• the purchase by an institution of the securities covered under that contract shall not at the time of delivery be prohibited under the laws of the jurisdiction to which that institution is subject; and

• if the securities are also being sold to underwriters acting as principals for their own account, the underwriters shall have purchased such securities not sold for delayed delivery. The underwriters and other persons acting as our agents will not have any responsibility in respect of the validity or performance of delayed delivery contracts.

Offered securities may also be offered and sold, if so indicated in the prospectus supplement, in connection with a remarketing upon their purchase, in accordance with a redemption or repayment pursuant to their terms, or otherwise, by one or more remarketing firms, acting as principals for their own accounts or as agents for us. Any remarketing firm will be identified and the terms of its agreement, if any, with us and its compensation will be described in the applicable prospectus supplement. Remarketing firms may be deemed to be underwriters in connection with their remarketing of offered securities.

Certain agents, underwriters and dealers, and their associates and affiliates, may be customers of, have borrowing relationships with, engage in other transactions with, or perform services, including investment banking services, for us or one or more of our respective affiliates in the ordinary course of business.

In order to facilitate the offering of the securities, any underwriters may engage in transactions that stabilize, maintain or otherwise affect the price of the securities or any other securities the prices of which may be used to determine payments on such securities. Specifically, any underwriters may overallot in connection with the offering, creating a short position for their own accounts. In

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addition, to cover overallotments or to stabilize the price of the securities or of any such other securities, the underwriters may bid for, and purchase, the securities or any such other securities in the open market. Finally, in any offering of the securities through a syndicate of underwriters, the underwriting syndicate may reclaim selling concessions allowed to an underwriter or a dealer for distributing the securities in the offering if the syndicate repurchases previously distributed securities in transactions to cover syndicate short positions, in stabilization transactions or otherwise. Any of these activities may stabilize or maintain the market price of the securities above independent market levels. Any such underwriters are not required to engage in these activities and may end any of these activities at any time.

We may engage in at the market offerings into an existing trading market in accordance with Rule 415(a)(4) under the Securities Act. In addition, we may enter into derivative transactions with third parties, or sell securities not covered by this prospectus to third parties in privately negotiated transactions. If the applicable prospectus supplement so indicates, in connection with those derivatives, the third parties may sell securities covered by this prospectus and the applicable prospectus supplement, including in short sale transactions. If so, the third party may use securities pledged by us or borrowed from us or others to settle those sales or to close out any related open borrowings of stock, and may use securities received from us in settlement of those derivatives to close out any related open borrowings of stock. The third party in such sale transactions will be an underwriter and, if not identified in this prospectus, will be named in the applicable prospectus supplement (or a post-effective amendment). In addition, we may otherwise loan or pledge securities to a financial institution or other third party that in turn may sell the securities short using this prospectus and an applicable prospectus supplement. Such financial institution or other third party may transfer its economic short position to investors in our securities or in connection with a concurrent offering of other securities.

Under Rule 15c6-1 of the Exchange Act, trades in the secondary market generally are required to settle in two business days, unless the parties to any such trade expressly agree otherwise or the securities are sold by us to an underwriter in a firm commitment underwritten offering. The applicable prospectus supplement may provide that the original issue date for your securities may be more than two scheduled business days after the trade date for your securities. Accordingly, in such a case, if you wish to trade securities on any date prior to the second business day before the original issue date for your securities, you will be required, by virtue of the fact that your securities initially are expected to settle in more than two scheduled business days after the trade date for your securities, to make alternative settlement arrangements to prevent a failed settlement.

The securities may be new issues of securities and may have no established trading market. The securities may or may not be listed on a national securities exchange. We can make no assurance as to the liquidity of or the existence of trading markets for any of the securities.

The specific terms of any lock-up provisions in respect of any given offering will be described in the applicable prospectus supplement.

The underwriters, dealers and agents may engage in transactions with us, or perform services for us, in the ordinary course of business for which they receive compensation.

The anticipated date of delivery of offered securities will be set forth in the applicable prospectus supplement relating to each offer.

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SELLING SECURITYHOLDERS

Information about selling security holders, if any, will be set forth in a prospectus supplement, in a post-effective amendment to the registration statement of which this prospectus is a part or in filings we make with the SEC under the Exchange Act, that are incorporated by reference.

LEGAL MATTERS

The validity of the securities in respect of which this prospectus is being delivered will be passed on for us by Goodwin Procter LLP, Boston, Massachusetts. Any underwriters will also be advised about the validity of the securities and other legal matters by their own counsel, which will be named in the prospectus supplement.

EXPERTS

The financial statements incorporated by reference in this prospectus and elsewhere in the registration statement have been so incorporated by reference in reliance on the reports of Grant Thornton LLP, independent registered public accountants, upon the authority of said firm as experts in auditing and accounting.

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WHERE YOU CAN FIND MORE INFORMATION

We file annual, quarterly and current reports, proxy statements and other information with the SEC. You may read and copy any document that we file at the Public Reference Room of the SEC at 100 F Street, N.E., Washington, D.C. 20549. You may obtain information on the operation of the Public Reference Room by calling the SEC at 1-800-SEC-0330. In addition, the SEC maintains a web site at www.sec.gov where you can electronically access our SEC filings, including the registration statement and the exhibits and schedules thereto.

INCORPORATION BY REFERENCE

The SEC allows us to incorporate by reference into this prospectus the information and reports we file with it, which means that we can disclose important information to you by referring you to these documents. The information incorporated by reference is an important part of this prospectus, and information that we file later with the SEC will automatically update and supersede the information already incorporated by reference. We are incorporating by reference the documents listed below, which we have already filed with the SEC, and any future filings we make with the SEC under Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act, including all filings made on or after the date of this prospectus and prior to the termination of the offering under this prospectus and any prospectus supplement. Notwithstanding the foregoing, we are not incorporating by reference any documents, portions of documents, exhibits or other information-including any information and related exhibits which are furnished under Item 2.02 and Item 7.01 of Current Report on Form 8-K-that is deemed to have been furnished to, rather than filed with, the SEC.

• Annual Report on Form 10-K for the fiscal year ended December 31, 2017, filed with the SEC on March 1, 2018;

• The information specifically incorporated by reference into our Annual Report on Form 10-K for the year ended December 31, 2017 from our definitive proxy statement on Schedule 14A (other than information furnished rather than filed), which was filed with the SEC on April 13, 2018;

• Quarterly Report on Form 10-Q for the quarter ended March 31, 2018, filed with the SEC on May 10, 2018;

• Current Reports on Form 8-K filed with the SEC on February 27, 2018, April 6, 2018 and May 8, 2018; and

• The description of our common stock contained in our registration statement on Form 8-A filed with the SEC on March 7, 2001 under Section 12(b) of the Exchange Act, including any amendments or reports filed for the purpose of updating such description.

Upon written or oral request, we will provide, without charge, to each person, including any beneficial owner, to whom a copy of this prospectus is delivered, a copy of the documents incorporated by reference into this prospectus but not delivered with the prospectus. You may request a copy of these filings, and any exhibits we have specifically incorporated by reference as an exhibit in this prospectus, at no cost by writing or calling us at the following:

Axon Enterprise, Inc

Attention: Corporate Secretary

17800 North 85th Street, Scottsdale, Arizona 85255

(480) 991-0797

As noted above, you may also access these documents, free of charge on the SEC’s website at www.sec.gov or on our website at www.axon.com. Information contained on our website is not

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incorporated by reference into this prospectus, and you should not consider any information on, or that can be accessed from, our website as part of this prospectus or any accompanying prospectus supplement. This prospectus is part of a registration statement we filed with the SEC. We have incorporated exhibits into this registration statement. You should read the exhibits carefully for provisions that may be important to you. You should rely only on the information incorporated by reference or provided in this prospectus or any prospectus supplement. We have not authorized anyone to provide you with different information. We are not making an offer of these securities in any state where the offer is not permitted. You should not assume that the information in this prospectus or in the documents incorporated by reference is accurate as of any date other than the date on the front of this prospectus or those documents.  

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4,300,000 Shares of Common Stock

Axon Enterprise, Inc.

J.P. Morgan		Morgan Stanley
Baird	Needham & Company	Raymond James	William Blair

PROSPECTUS

May 17, 2018

We have not authorized any dealer, salesperson or other person to give any information or represent anything not contained in this prospectus. You must not rely on any unauthorized information. If anyone provides you with different or inconsistent information, you should not rely on it. This prospectus does not offer to sell any securities in any jurisdiction where it is unlawful. Neither the delivery of this prospectus, nor any sale made hereunder, shall create any implication that the information in this prospectus is correct after the date hereof.