ARCA BIOPHARMA INC (ABIO)
Institutional ownership reported to the SEC as of Q2 2024, across 21 quarters.
32
Reporting holders
$49.6M
Reported value
0.3%
Calls
0.1%
Puts
+11
Holder change
Calls and puts are the parts of reported value carried in derivative lines rather than shares, and they point in opposite directions: a manager holding calls is positioned for the security, one holding puts against it - or hedging shares they already own, which is why index funds carry so many. Most sites add the two together and report one figure, which averages away the only interesting part.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| Cable Car Capital LLC | $15.3M | 4,000,452 | 16.14% | 3q | HELD |
| RTW INVESTMENTS, LP | $5.4M | 1,400,000 | 0.08% | new | NEW |
| JANUS HENDERSON GROUP PLC | $5.2M | 1,382,736 | 0.00% | new | NEW |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | $4.6M | 1,200,000 | 0.01% | new | NEW |
| Avidity Partners Management LP | $3.8M | 1,000,000 | 0.16% | new | NEW |
| VR Adviser, LLC | $3.3M | 866,375 | 0.21% | new | NEW |
| COWEN AND COMPANY, LLC | $2.7M | 700,000 | 0.07% | new | NEW |
| MORGAN STANLEY | $2.5M | 650,000 | 0.00% | new | NEW |
| VANGUARD GROUP INC | $1.7M | 453,598 | 0.00% | 16q | HELD |
| COMMODORE CAPITAL LP | $1.6M | 414,325 | 0.11% | new | NEW |
| BlackRock Inc. | $949.5K | 247,909 | 0.00% | 16q | +7.2%+$63.8K |
| GEODE CAPITAL MANAGEMENT, LLC | $619.5K | 161,735 | 0.00% | 15q | +13.6%+$74.3K |
| ADAR1 Capital Management, LLC | $324.3K | 84,676 | 0.06% | new | NEW |
| RENAISSANCE TECHNOLOGIES LLC | $280.0K | 73,099 | 0.00% | 9q | +11.3%+$28.3K |
| Affinity Asset Advisors, LLC | $277.6K | 72,484 | 0.03% | new | NEW |
| STATE STREET CORP | $228.7K | 59,707 | 0.00% | 13q | HELD |
| DIMENSIONAL FUND ADVISORS LP | $162.8K | 42,502 | 0.00% | 11q | HELD |
| abrdn plc | $124.3K | 32,461 | 0.00% | 3q | HELD |
| CITADEL ADVISORS LLC | $121.4K | 3,985 | 0.00% | 14q | +225.6%+$84.1K |
| Cubist Systematic Strategies, LLC | $106.4K | 27,779 | 0.00% | new | NEW |
| NORTHERN TRUST CORP | $80.4K | 20,982 | 0.00% | 15q | HELD |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $74.7K | options only | 0.00% | new | OPTIONS |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $57.4K | 14,988 | 0.00% | 6q | HELD |
| GROUP ONE TRADING, L.P. | $51.8K | 7,131 | 0.00% | new | NEW |
| Activest Wealth Management | $7.7K | 2,000 | 0.00% | new | NEW |
| Tower Research Capital LLC (TRC) | $1.3K | 344 | 0.00% | 8q | -88.8%-$10.5K |
| SIMPLEX TRADING, LLC | $1.0K | 275 | 0.00% | new | NEW |
| Parallel Advisors, LLC | $935 | 244 | 0.00% | 12q | HELD |
| BANK OF AMERICA CORP /DE/ | $579 | 151 | 0.00% | 7q | -14.2% |
| Qube Research & Technologies Ltd | $192 | 50 | 0.00% | 4q | HELD |
| JPMORGAN CHASE & CO | $122 | 32 | 0.00% | 4q | -11.1% |
| WELLS FARGO & COMPANY/MN | $1 | 0 | 0.00% | 7q | -100.0% |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q2 2024 | 32 | $49.6M | 12,920,020 | 17 | 4 | 4 | 0.4% |
| Q1 2024 | 21 | $12.8M | 7,198,849 | 2 | 5 | 2 | 0.8% |
| Q4 2023 | 24 | $12.7M | 7,477,180 | 2 | 7 | 2 | 0.3% |
| Q3 2023 | 23 | $6.6M | 3,257,695 | 4 | 3 | 7 | 1.2% |
| Q2 2023 | 25 | $5.9M | 2,830,616 | 3 | 2 | 6 | 1.9% |
| Q1 2023 | 28 | $5.4M | 2,523,080 | 7 | 8 | 3 | 6.7% |
| Q4 2022 | 24 | $6.5M | 2,614,171 | 4 | 3 | 3 | 4.6% |
| Q3 2022 | 22 | $8.2M | 2,260,845 | 5 | 5 | 3 | 43.1% |
| Q2 2022 | 22 | $8.5M | 1,675,731 | 6 | 4 | 3 | 50.7% |
| Q1 2022 | 21 | $3.0M | 1,133,069 | 6 | 4 | 5 | 12.3% |
| Q4 2021 | 17 | $3.0M | 1,152,745 | 3 | 4 | 3 | 17.3% |
| Q3 2021 | 16 | $5.0M | 1,528,270 | 7 | 5 | 2 | 8.8% |
| Q2 2021 | 14 | $4.5M | 1,193,080 | 4 | 4 | 2 | 7.9% |
| Q1 2021 | 14 | $3.6M | 876,401 | 6 | 6 | 1 | 11.4% |
| Q4 2020 | 15 | $3.5M | 853,236 | 11 | 3 | 0 | 3.5% |
| Q3 2020 | 9 | $1.8M | 411,828 | 7 | 0 | 1 | 0.0% |
| Q2 2020 | 3 | $898.0K | 135,652 | 0 | 0 | 3 | 0.0% |
| Q1 2020 | 5 | $562.0K | 201,095 | 1 | 2 | 1 | 0.0% |
| Q4 2019 | 7 | $1.2M | 211,047 | 3 | 1 | 0 | 0.0% |
| Q3 2019 | 7 | $910.0K | 170,259 | 2 | 1 | 1 | 0.0% |
| Q2 2019 | 8 | $2.0M | 272,542 | 8 | 0 | 0 | 0.0% |