8-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): February 4, 2015 (February 4, 2015)

ARCA biopharma, Inc.

(Exact Name of Registrant as Specified in Charter)

Delaware	000-22873	36-3855489
(State or Other Jurisdiction of Incorporation)	(Commission File Number)	(I.R.S. Employer Identification No.)

11080 CirclePoint Road, Suite 140, Westminster, CO 80020

(Address of Principal Executive Offices) (Zip Code)

(720) 940-2200

(Registrant’s telephone number, including area code)

Not Applicable

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Section 8 — Other Events

Item 8.01. Other Events.

On February 4, 2015, ARCA biopharma, Inc. (“ARCA”) announced that the U.S. Patent and Trademark Office issued a patent on methods and compositions of the S-isomer formulation of Gencaro (bucindolol hydrochloride). The press release is furnished as Exhibit 99.1 hereto, the contents of which are incorporated herein by reference.

Section 9 — Financial Statements and Exhibits

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits.

Exhibit Number	Description
99.1	Press Release titled “ARCA biopharma Announces Patent Issuance for Methods and Compositions of S-Isomer Formulation of Gencaro” dated February 4, 2015.

SIGNATURES

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

Dated: February 4, 2015

ARCA biopharma, Inc. (Registrant)
By:	/s/ Christopher Ozeroff
Name:	Christopher Ozeroff
Title:	SVP and General Counsel

INDEX TO EXHIBITS

Exhibit Number	Description
99.1	Press Release titled “ARCA biopharma Announces Patent Issuance for Methods and Compositions of S-Isomer Formulation of Gencaro” dated February 4, 2015.

EX-99.1

Exhibit 99.1

ARCA BIOPHARMA ANNOUNCES PATENT ISSUANCE FOR METHODS AND

COMPOSITIONS OF S-ISOMER FORMULATION OF GENCARO

Patent Includes Methods for Treating Multiple Cardiovascular Disease Indications

Westminster, CO, February 4, 2015 – ARCA biopharma, Inc. (Nasdaq: ABIO), a biopharmaceutical company developing genetically targeted therapies for cardiovascular diseases, today announced that the U.S. Patent and Trademark Office (USPTO) has issued a patent on methods and compositions of the S-isomer formulation of Gencaro^TM (bucindolol hydrochloride). The patent (USP# 8946284), entitled “Methods and Compositions involving (S)-Bucindolol,” provides intellectual property protection in the United States for the use of S-isomer Gencaro (Gencaro substantially free of its R-stereoisomer) as a potential treatment for right ventricular heart failure, congestive heart failure, hypertension, angina, myocardial infarction, cardiac arrhythmia, mitral valve prolapse, hypertrophic obstructive cardiomyopathy, or acute dissecting aortic aneurysm.

“We are pleased with the USPTO’s issuance of this patent, which we believe broadens our intellectual property protection around Gencaro in multiple important cardiovascular disease indications which impact large patient populations globally,” said Michael R. Bristow, President and Chief Executive Officer of ARCA. “This patent is a result of ARCA’s continued focus on innovation in cardiovascular drug development. The S-isomer of Gencaro contains the high affinity beta-1 and beta-2 receptor-blocking action as well as nitric oxide generating activity. In GENETIC-AF, our on-going Phase 2B/3 clinical trial, we are evaluating racemic (contains both S and R isomers) Gencaro as a potential treatment for the prevention of atrial fibrillation in a pharmacogenetically defined heart failure population at high risk of developing recurrent atrial fibrillation.

About ARCA biopharma

ARCA is dedicated to developing genetically-targeted therapies for cardiovascular diseases. The Company’s lead product candidate, Gencaro^TM (bucindolol hydrochloride), is an investigational, pharmacologically unique beta-blocker and mild vasodilator being evaluated as a potential treatment for atrial fibrillation in the Phase 2B/3 GENETIC-AF clinical trial, which is enrolling patients in the United States and Canada. ARCA has identified common genetic variations that it believes predict individual patient response to Gencaro, giving it the potential to be the first approved genetically-targeted atrial fibrillation prevention treatment. ARCA has a collaboration with Medtronic, Inc. for support of the GENETIC-AF trial. For more information please visit www.arcabiopharma.com.

Safe Harbor Statement

This press release contains “forward-looking statements” for purposes of the safe harbor provided by the Private Securities Litigation Reform Act of 1995. These statements include, but are not limited to, statements regarding, the potential for S-isomer Gencaro to possibly be a treatment for several different cardiovascular indications, the potential for genetic variations to predict individual patient response to Gencaro, Gencaro’s potential to treat atrial fibrillation, future treatment options for patients with atrial fibrillation, and the potential for Gencaro to be the first genetically-targeted atrial fibrillation prevention treatment. Such statements are based on management’s current expectations and involve risks and uncertainties. Actual results and performance could differ materially from those projected in the forward-looking statements as a result of many factors, including, without limitation, the risks and uncertainties associated with: the Company’s financial resources and whether they will be sufficient to meet the Company’s business objectives and operational requirements; results of earlier clinical trials may not be confirmed in future trials, the protection and market exclusivity provided by the Company’s intellectual property; risks related to the drug discovery and the regulatory approval process; and, the impact of competitive products and technological changes. These and other factors are identified and described in more detail in ARCA’s filings with the SEC, including without limitation the Company’s annual report on Form 10-K for the year ended December 31, 2013, and subsequent filings. The Company disclaims any intent or obligation to update these forward-looking statements.

Investor & Media Contact:

Derek Cole

720.940.2163

derek.cole@arcabiopharma.com

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