Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  Selby Brian L.
 2. Date of Event Requiring Statement (Month/Day/Year)
12/30/2014		 3. Issuer Name and Ticker or Trading Symbol
ARCA biopharma, Inc. [ABIO]
(Last)
(First)
(Middle)
11080 CIRCLEPOINT ROAD, SUITE 140		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
VP, Finance
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

WESTMINSTER, CO 80020		 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock 11,166 (1)
D
 

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Stock Options (Right to buy) 05/01/2011 05/02/2017 Common Stock 834 $ 10.8 D  
Stock Options (Right to buy) 02/12/2012 02/11/2018 Common Stock 1,252 $ 11.16 D  
Stock Options (Right to buy) 01/23/2013 01/22/2019 Common Stock 417 $ 33.42 D  
Stock Options (Right to buy) 06/25/2013 06/25/2019 Common Stock 626 $ 17.4 D  
Stock Options (Right to buy) 02/18/2013 02/18/2020 Common Stock 533 $ 17.82 D  
Stock Options (Right to buy) 05/20/2014 05/20/2021 Common Stock 1,333 $ 13.44 D  
Stock Options (Right to buy)   (2) 09/16/2023 Common Stock 29,214 $ 1.38 D  
Stock Options (Right to buy)   (3) 02/26/2024 Common Stock 7,500 $ 1.95 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Selby Brian L.
11080 CIRCLEPOINT ROAD, SUITE 140
WESTMINSTER, CO 80020		       VP, Finance  

Signatures

/s/ Brian L. Selby 12/30/2014
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Represents 11,166 unvested shares issued as restricted stock units (an "RSU") under the Issuer's 2013 Equity Incentive Plan (the "Plan"). A total of 10,000 RSUs that vest in three equal annual installments were granted on September 17, 2013. 6,666 of the remaining RSUs vest in two equal annual installments on September 17, 2015 and September 17, 2016, provided that the Reporting Person's continuous service to the Issuer has not been terminated as defined in or as determined under the Plan prior to such time. 4,500 of the RSUs vest in four equal annual installments from February 27, 2014, the date of grant, provided that the Reporting Person's continuous service to the Issuer has not been terminated as defined in or as determined under the Plan prior to such time.
(2) Grant to the Reporting Person of a stock option under the Plan, vesting in 36 equal monthly installments from September 17, 2013, the date of grant, provided that the Reporting Person's continuous service to the Issuer has not been terminated as defined in or as determined under the Plan prior to such time.
(3) Grant to the Reporting Person of a stock option under the Plan, vesting in 48 equal monthly installments from February 27, 2014, the date of grant, provided that the Reporting Person's continuous service to the Issuer has not been terminated as defined in or as determined under the Plan prior to such time.

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