ARCA BIOPHARMA INC
COM · CUSIP 00211Y506
33
institutional holders
+9 vs Q1 2024
12.9m
shares reported held*
$49.4mreported value*
13 new
5 added
5 reduced
4 sold out
net bought ≈ $21.9m (+5.7m shares)
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once. Holder counts are more reliable. Implied quarter-end price ≈ $3.83. Options: 5 managers hold calls ($163.2k notional), 4 hold puts ($42.1k).
Trends to Q2 2024
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 26 |
| Q4 2022 | 23 |
| Q1 2023 | 27 |
| Q2 2023 | 24 |
| Q3 2023 | 22 |
| Q4 2023 | 26 |
| Q1 2024 | 24 |
| Q2 2024 | 33 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Bought or addedCut or sold out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q4 2022 | 10 | 9 |
| Q1 2023 | 14 | 4 |
| Q2 2023 | 5 | 12 |
| Q3 2023 | 7 | 11 |
| Q4 2023 | 11 | 5 |
| Q1 2024 | 7 | 9 |
| Q2 2024 | 18 | 9 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
CallsPuts
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2023 | $79.2k | $201 | 0.00 |
| Q4 2023 | $36.5k | $170 | 0.00 |
| Q1 2024 | $97.4k | $0 | 0.00 |
| Q2 2024 | $163.2k | $42.1k | 0.26 |
Biggest buyers
| RTW INVESTMENTS, LP | New | +1.4m |
| JANUS HENDERSON GROUP PLC | New | +1.4m |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | New | +1.2m |
| Avidity Partners Management LP | New | +1.0m |
| Venrock Adviser, LLC | New | +866.4k |
| COWEN AND COMPANY, LLC | New | +700.0k |
| MORGAN STANLEY | New | +650.0k |
| Commodore Capital LP | New | +414.3k |
| ADAR1 Capital Management, LLC | New | +84.7k |
| Affinity Asset Advisors, LLC | New | +72.5k |
Biggest sellers
| Western Standard LLC | Sold out | -1.4m |
| BML Capital Management, LLC | Sold out | -706.9k |
| HRT FINANCIAL LP | Sold out | -12.7k |
| Tower Research Capital LLC (TRC) | Reduced | -2.7k |
| FMR LLC | Sold out | -201 |
| WELLS FARGO & COMPANY/MN | Reduced | -80 |
| BANK OF AMERICA CORP /DE/ | Reduced | -25 |
| ROYAL BANK OF CANADA | Reduced | -23 |
| JPMORGAN CHASE & CO | Reduced | -4 |
Biggest calls
| CITADEL ADVISORS LLC | Reduced | $84.6k22.1k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | New | $74.7k19.5k shares |
| GROUP ONE TRADING LLC | New | $3.8k1.0k shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
| SIMPLEX TRADING, LLC | New | $0200 shares |
Biggest puts
| CITADEL ADVISORS LLC | New | $21.4k5.6k shares |
| GROUP ONE TRADING LLC | New | $20.7k5.4k shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
| SIMPLEX TRADING, LLC | Added | $0200 shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Holders, Q2 2024
| Manager | Shares | Change |
|---|---|---|
| Cable Car Capital, LP 16.16% of their portfolio | 4.0m $15.3m | Unchanged |
| RTW INVESTMENTS, LP 0.08% of their portfolio | 1.4m $5.4m | New |
| JANUS HENDERSON GROUP PLC 0.00% of their portfolio | 1.4m $5.2m | New |
| ADAGE CAPITAL PARTNERS GP, L.L.C. 0.01% of their portfolio | 1.2m $4.6m | New |
| Avidity Partners Management LP 0.16% of their portfolio | 1.0m $3.8m | New |
| Venrock Adviser, LLC 0.21% of their portfolio | 866.4k $3.3m | New |
| COWEN AND COMPANY, LLC 0.07% of their portfolio | 700.0k $2.7m | New |
| MORGAN STANLEY 0.00% of their portfolio | 650.0k $2.5m | New |
| VANGUARD GROUP INC 0.00% of their portfolio | 453.6k $1.7m | Unchanged |
| Commodore Capital LP 0.11% of their portfolio | 414.3k $1.6m | New |
| BlackRock Inc. 0.00% of their portfolio | 247.9k $949.5k | Added +16.7k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 161.7k $619.5k | Added +19.4k |
| ADAR1 Capital Management, LLC 0.07% of their portfolio | 84.7k $324.3k | New |
| RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio | 73.1k $280.0k | Added +7.4k |
| Affinity Asset Advisors, LLC 0.04% of their portfolio | 72.5k $277.6k | New |
| STATE STREET CORP 0.00% of their portfolio | 59.7k $228.7k | Unchanged |
| DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio | 42.5k $162.8k | Unchanged |
| Aberdeen Group plc 0.00% of their portfolio | 32.5k $124.3k | Unchanged |
| Cubist Systematic Strategies, LLC 0.00% of their portfolio | 27.8k $106.4k | New |
| NORTHERN TRUST CORP 0.00% of their portfolio | 21.0k $80.4k | Unchanged |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 15.0k $57.4k | Unchanged |
| GROUP ONE TRADING LLC 0.00% of their portfolio | 7.1k $27.3k | New |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 4.0k $15.3k | Added +2.8k |
| Activest Wealth Management 0.00% of their portfolio | 2.0k $7.7k | New |
| Tower Research Capital LLC (TRC) 0.00% of their portfolio | 344 $1.3k | Reduced -2.7k |
| SIMPLEX TRADING, LLC 0.00% of their portfolio | 275 $1.0k | Added +272 |
| Parallel Advisors, LLC 0.00% of their portfolio | 244 $935 | Unchanged |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 151 $579 | Reduced -25 |
| Qube Research & Technologies Ltd 0.00% of their portfolio | 50 $192 | Unchanged |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 33 $0 | Reduced -23 |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 32 $122 | Reduced -4 |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 0 $1 | Reduced -80 |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. 0.00% of their portfolio | 0 $0 | Unchanged |