SC 13G: ARCA biopharma, Inc.

AI Summary

SC 13G filing by ARCA biopharma, Inc..

Risk Assessment

Risk Level: low

FAQ

Key Financial Figures

• $0.0001 — Inc. (Name of Issuer) Common Stock, $0.0001 par value (Title of Class of Securiti

Filing Documents

• d11021961_13-g.htm (SC 13G) — 162KB
• 0000919574-24-002436.txt ( ) — 164KB

From the Filing

SC 13G 1 d11021961_13-g.htm UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No.)* ARCA biopharma, Inc. (Name of Issuer) Common Stock, $0.0001 par value (Title of Class of Securities) 00211Y506 (CUSIP Number) April 3, 2024 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is filed: [_] Rule 13d-1(b) [X] Rule 13d-1(c) [_] Rule 13d-1(d) __________ *The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page. The information required in the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes). CUSIP No. 00211Y506 1. NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Avidity Partners Management LP 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (a) [_] (b) [X] 3. SEC USE ONLY 4. CITIZENSHIP OR PLACE OF ORGANIZATION Delaware NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH 5. SOLE VOTING POWER 0 6. SHARED VOTING POWER 1,000,000 7. SOLE DISPOSITIVE POWER 0 8. SHARED DISPOSITIVE POWER 1,000,000 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,000,000 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [_] 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 6.9% 1 12. TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) IA, PN 1 The percentage of ownership based on 14,501,143 shares of Common Stock of the Company outstanding as of March 28, 2024, as reported on the Issuer’s Form 8-K filed on April 3, 2024. CUSIP No. 00211Y506 1. NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Avidity Partners Management (GP) LLC 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (a) [_] (b) [X] 3. SEC USE ONLY 4. CITIZENSHIP OR PLACE OF ORGANIZATION Delaware NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH 5. SOLE VOTING POWER 0 6. SHARED VOTING POWER 1,000,000 7. SOLE DISPOSITIVE POWER 0 8. SHARED DISPOSITIVE POWER 1,000,000 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,000,000 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [_] 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 6.9% 2 12. TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) OO 2 The percentage of ownership based on 14,501,143 shares of Common Stock of the Company outstanding as of March 28, 2024, as reported on the Issuer’s Form 8-K filed on April 3, 2024. CUSIP No. 00211Y506 1. NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Avidity Capital Partners Fund (GP) LP 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (a) [_] (b) [X] 3. SEC USE ONLY 4. CITIZENSHIP OR PLACE OF ORGANIZATION Delaware NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH 5. SOLE VOTING POWER 0 6. SHARED VOTING POWER 1,000,000 7. SOLE DISPOSITIVE POWER 0 8. SHARED DISPOSITIVE POWER 1,000,000 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,000,000 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [_] 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 6.9% 3 12. TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) OO, PN 3 The percentage of ownership based on 14,501,143 shares of Common Stock of the Company outstanding as of March 28, 2024, as reported on the Issuer’s Form 8-K filed on April 3, 2024. CUSIP No. 00211Y506 1. NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Avidity Capital Partners (GP) LLC 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (a) [_] (b) [X] 3. SEC USE ONLY 4. CITIZENSHIP OR PLACE OF ORGANIZATION Delaware NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH 5. SOLE VOTING POWER 0 6. SHARED VOTING POWER 1,000,000 7. SOLE DISPOSITIVE POWER 0 8. SHARED DISPOSITIVE POWER 1,000,000 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,000,000 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [_] 11. PERCENT OF CLASS REPRESENTED BY AMOUNT I

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