ARCA Biopharma Inc

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ARCA Biopharma Inc
TickerORKA
CIK #0000907654
CUSIP687604108
SectorLife Sciences - In Vitro & In Vivo Diagnostic Substances
Address8001 Arista Place Suite 200, Broomfield, CO 80021
Source [EDGAR]
Reg D Offering (Form D) Filed Raised Terms
ARCA Biopharma Inc 2015-06-25 51.7 M Exemption: 506(b) · Duration: One year or less · Commission: $2,590,000 · Revenue: Decline to Disclose
CIK Filing 2011 - 2026
[0000907654] 10-K
[0000907654] 10-Q
[0000907654] 3
[0000907654] 4
[0000907654] 8-K
[0000907654] D
[0000907654] SC 13D
[0000907654] SC 13G
Form 13D/13G Filer Form 13D/13G Subject Filed % Owned
Vanguard Group Inc Oruka Therapeutics Inc [2026-01-30] 0.0
BlackRock Inc Oruka Therapeutics Inc [2026-01-21] 0.0
BlackRock Inc Oruka Therapeutics Inc [2025-07-17] 0.0
RTW Investments LP Oruka Therapeutics Inc [2025-05-15] 0.0
Deep Track Capital LP Oruka Therapeutics Inc [2025-05-13] 0.0
FMR LLC Oruka Therapeutics Inc [2024-10-07] 0.0
Fairmount Funds Management LLC Oruka Therapeutics Inc [2024-09-06] 19.99
Venrock Healthcare Capital Partners III LP ARCA Biopharma Inc [2024-04-29] 5.2
Allostery Investments LP ARCA Biopharma Inc [2024-04-15] 7.3
Janus Henderson Group PLC ARCA Biopharma Inc [2024-04-11] 7.4
Avidity Partners Management LP ARCA Biopharma Inc [2024-04-09] 6.9
Adage Capital Management LP ARCA Biopharma Inc [2024-04-05] 8.28
Western Standard LLC ARCA Biopharma Inc [2023-09-11] 0.0
Funicular Fund LP ARCA Biopharma Inc [2022-03-28] 6.49
BML Investment Partners LP ARCA Biopharma Inc [2022-01-27] 5.3
Altium Capital Management LP ARCA Biopharma Inc [2020-06-10] 9.99
Sabby Management LLC ARCA Biopharma Inc [2020-06-01] 0.99
Renaissance Technologies LLC ARCA Biopharma Inc [2019-02-12] 5.88
Tekla Capital Management LLC ARCA Biopharma Inc [2016-02-12] 0.0
Franklin Resources Inc ARCA Biopharma Inc [2016-01-08] 17.9
Franklin Resources Inc ARCA Biopharma Inc [2015-07-09] 13.7
Growth Equity Opportunities IV LLC ARCA Biopharma Inc [2015-06-29] 21.3
Venrock Healthcare Capital Partners LP ARCA Biopharma Inc [2015-06-25] 17.1
RA Capital Management LLC ARCA Biopharma Inc [2015-06-25] 0.0
McCormack Riley ARCA Biopharma Inc [2013-10-07] 18.26
Sabby Management LLC ARCA Biopharma Inc [2013-06-03] 0.99
[2012-12-28] None
Atlas Venture Fund VII L P ARCA Biopharma Inc [2012-11-02] 12.0
Sabby Management LLC ARCA Biopharma Inc [2012-08-08] 5.83
Form 3/4/5 Filer 2011 - 2026
Sandler Laura Lee
Oruka Therapeutics Inc
Kiselak Tomas
Fairmount Funds Management LLC
Fairmount Healthcare Co-Invest III LP
Fairmount Healthcare Fund II LP
Harwin Peter Evan
Agarwal Arjun
Quinlan Paul T
Klein Lawrence Otto
Goncalves Joana
Dambkowski Carl
Kulkarni Samarth
Martin Christopher Nathan
Ball Kristine M
Turtle Cameron
Shah Nimish P
VHCP Management EG LLC
VHCP Management III LLC
Venrock Healthcare Capital Partners EG LP
Koh Bong Y
Venrock Healthcare Capital Partners III LP
VHCP Co-Investment Holdings III LLC
Ma-Weaver Jacob
Janus Henderson Group PLC
Janus Henderson Biotech Innovation Master Fund Ltd
Grais Linda
Flynn James P
Conway Robert E
Mitchell Daniel J
Hove Anders D
Woosley Raymond L
Funicular Funds LP
Dekker C Jeffrey
Keuer Thomas A
Funicular Fund LP
Bristow Michael R
Ozeroff Christopher David
Selby Brian L
VHCP Management LLC
VHCP Co-Investment Holdings II LLC
VHCP Management II LLC
Venrock Healthcare Capital Partners LP
Venrock Healthcare Capital Partners II LP
VHCP Co-Investment Holdings LLC
NEA 15 GP LLC
NEA Partners 15 LP
Growth Equity Opportunities Fund IV LLC
New Enterprise Associates 15 LP
Viswanathan Ravi
Sonsini Peter W
Sandell Scott D
Sakoda Jon
Mott David M
Makower Joshua
Florence Anthony A Jr
Baskett Forest
Barris Peter J
Weller Harry R
Kolluri Krishna Kittu
McCormack Riley
Wheeler Patrick M
Zabriskie John L
Atlas Venture Associates VII LP
Atlas Venture Fund VII L P
Formela Jean Francois
Sobel Burton E
Brewer Richard B
Insider Transaction (Form 3/4/5) Date Action Shares Price Value ($)
Goncalves Joana
Common Stock
2026-03-16 Option exercise 3,500 $7.80 27,300
Agarwal Arjun
Common Stock
2026-03-16 Sell 395 $41.30 16,313
Goncalves Joana
Employee Stock Option (right to buy) · derivative
2026-03-16 Option exercise 3,500 $0.00
Goncalves Joana
Employee Warrant (right to buy) · derivative
2026-03-16 Option exercise 3,500 $0.00
Goncalves Joana
Common Stock
2026-03-16 Option exercise 3,500 $6.84 23,940
Goncalves Joana
Common Stock
2026-03-16 Sell 641 $41.30 26,473
Quinlan Paul T
Common Stock
2026-03-16 Sell 733 $41.30 30,273
Klein Lawrence Otto
Common Stock
2026-03-16 Sell 1,729 $41.30 71,408
Sandler Laura Lee
Common Stock
2026-03-16 Sell 600 $41.30 24,780
Goncalves Joana
Common Stock
2026-03-16 Sell 1,177 $41.94 49,363
Goncalves Joana
Common Stock
2026-03-16 Sell 2,902 $41.20 119,562
Goncalves Joana
Common Stock
2026-03-16 Sell 2,921 $40.11 117,161
Sandler Laura Lee
Employee Warrant (right to buy) · derivative
2026-03-02 Option exercise 5,000 $0.00
Sandler Laura Lee
Common Stock
2026-03-02 Sell 2,675 $33.81 90,442
Sandler Laura Lee
Common Stock
2026-03-02 Option exercise 5,000 $7.80 39,000
Sandler Laura Lee
Common Stock
2026-03-02 Sell 2,325 $33.28 77,376
Goncalves Joana
Common Stock
2026-02-17 Sell 6,064 $32.30 195,867
Goncalves Joana
Common Stock
2026-02-17 Option exercise 3,500 $7.80 27,300
Goncalves Joana
Common Stock
2026-02-17 Sell 936 $32.78 30,682
Goncalves Joana
Employee Warrant (right to buy) · derivative
2026-02-17 Option exercise 3,500 $0.00
showing 20 of 200 most recent transactions
13F Ownership Over TimeHoldersShares Held
2026-03-31 185 52,352,834
2025-12-31 143 50,733,444
2025-09-30 107 45,153,619
2025-06-30 81 34,424,029
2025-03-31 72 31,730,080
2024-12-31 67 29,730,087
2024-09-30 44 24,297,191
Form 13F Holdings
Firm Period DFND Voting Shares
Moody Aldrich Partners LLC [2026-06-30] SOLE 46,154 101,411
Secure Asset Management LLC [2026-06-30] SOLE 2,695 65,899
Empirical Financial Services LLC DBA Empirical Wealth Ma [2026-06-30] SOLE 19,276 19,312
PSP Research LLC [2026-06-30] SOLE 0 3,000
Gradient Investments LLC [2026-06-30] SOLE 0 2,868
Activest Wealth Management [2026-06-30] SOLE 0 166
Handelsbanken Fonder AB [2026-06-30] SOLE 0 160
Gamma Investing LLC [2026-06-30] DFND 124 124
Versant Capital Management Inc [2026-06-30] SOLE 98 98
Farther Finance Advisors LLC [2026-06-30] SOLE 0 21
Fortitude Family Office LLC [2026-06-30] SOLE 12 12
IFP Advisors LLC [2026-06-30] SOLE 10 10
Ares Financial Consulting LLC [2026-06-30] SOLE 7 7
MassMutual Private Wealth & Trust FSB [2026-06-30] SOLE 3 3
Hughes Financial Services LLC [2026-06-30] SOLE 2 2
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