BIOATLA INC BCAB
COM · Common Stock · CUSIP 09077B104
- SectorHealth care
- IndustryBiological Products, (No Diagnostic Substances)
- HeadquartersSan Diego, CA
- FilingsSEC EDGAR
* 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 ≈ $0.16. Options: 3 managers hold calls ($17.5k notional), 1 hold puts ($32).
Trends to Q1 2026
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 74 |
| Q4 2022 | 92 |
| Q1 2023 | 82 |
| Q2 2023 | 88 |
| Q3 2023 | 83 |
| Q4 2023 | 80 |
| Q1 2024 | 85 |
| Q2 2024 | 81 |
| Q3 2024 | 66 |
| Q4 2024 | 68 |
| Q1 2025 | 44 |
| Q2 2025 | 40 |
| Q3 2025 | 43 |
| Q4 2025 | 41 |
| Q1 2026 | 34 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q2 2024 | 41 | 58 |
| Q3 2024 | 22 | 54 |
| Q4 2024 | 33 | 39 |
| Q1 2025 | 16 | 41 |
| Q2 2025 | 13 | 20 |
| Q3 2025 | 21 | 11 |
| Q4 2025 | 21 | 13 |
| Q1 2026 | 13 | 21 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q2 2025 | $12.8k | $0 | 0.00 |
| Q3 2025 | $48.8k | $0 | 0.00 |
| Q4 2025 | $6.8k | $340 | 0.05 |
| Q1 2026 | $17.5k | $32 | 0.00 |
Biggest buyers
| MILLENNIUM MANAGEMENT LLC | Added | +2.0m |
| ACORN CAPITAL ADVISORS, LLC | Added | +571.2k |
| ACADIAN ASSET MANAGEMENT LLC | Added | +476.2k |
| CITADEL ADVISORS LLC | New | +435.7k |
| GEODE CAPITAL MANAGEMENT, LLC | Added | +188.9k |
| UBS Group AG | Added | +149.9k |
| Stonepine Capital Management, LLC | New | +65.4k |
| ADAR1 Capital Management, LLC | Added | +45.0k |
| Kestra Advisory Services, LLC | New | +44.2k |
| StoneX Group Inc. | New | +29.5k |
Biggest sellers
| MARSHALL WACE, LLP | Sold out | -891.6k |
| JANE STREET GROUP, LLC | Reduced | -323.6k |
| RENAISSANCE TECHNOLOGIES LLC | Reduced | -196.7k |
| TWO SIGMA INVESTMENTS, LP | Sold out | -81.3k |
| PVG ASSET MANAGEMENT CORP | Sold out | -69.0k |
| Virtu Financial LLC | Sold out | -55.5k |
| HRT FINANCIAL LP | Sold out | -54.7k |
| SIMPLEX TRADING, LLC | Reduced | -46.5k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | -42.6k |
| COLUMBIA ADVISORY PARTNERS LLC | Sold out | -26.1k |
Biggest calls
| JANE STREET GROUP, LLC | New | $11.3k70.2k shares |
| CITADEL ADVISORS LLC | Added | $6.1k37.9k shares |
| SIMPLEX TRADING, LLC | Added | $144900 shares |
Biggest puts
| SIMPLEX TRADING, LLC | Reduced | $32200 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.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| ACORN BIOVENTURES, L.P. 13G · passive investor filed 2025-05-20 | 8.3% |
| HIGHBRIDGE CAPITAL MANAGEMENT LLC 13G · institution -2.2 pts · filed 2025-04-25 | 7.7% |
| SHORT JAY M PHD 13G · exempt (held before listing) filed 2025-02-07 | 6.6% |
Insider purchases and sales in Q1 2026
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
None reported in Q1 2026.
Holders, Q1 2026
| Manager | Shares | Change |
|---|---|---|
| ACORN CAPITAL ADVISORS, LLC 0.25% of their portfolio | 5.4m $865.0k | Added +571.2k |
| MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio | 2.8m $443.8k | Added +2.0m |
| VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 1.6m $265.5k | First filing |
| ACADIAN ASSET MANAGEMENT LLC 0.00% of their portfolio | 1.2m $198.0k | Added +476.2k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 689.2k $111.0k | Added +188.9k |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 525.4k $84.1k | Reduced -1 |
| RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio | 510.5k $82.2k | Reduced -196.7k |
| BlackRock, Inc. 0.00% of their portfolio | 480.9k $77.4k | Reduced -2 |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 435.7k $70.1k | New |
| UBS Group AG 0.00% of their portfolio | 375.6k $60.5k | Added +149.9k |
| VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio | 273.4k $44.0k | First filing |
| ADAR1 Capital Management, LLC 0.00% of their portfolio | 228.1k $36.7k | Added +45.0k |
| STATE STREET CORP 0.00% of their portfolio | 151.4k $24.4k | Unchanged |
| NORTHERN TRUST CORP 0.00% of their portfolio | 103.5k $16.7k | Unchanged |
| SIMPLEX TRADING, LLC 0.00% of their portfolio | 73.9k $11.9k | Reduced -46.5k |
| Stonepine Capital Management, LLC 0.01% of their portfolio | 65.4k $10.5k | New |
| XTX Topco Ltd 0.00% of their portfolio | 56.6k $9.1k | Reduced -3.8k |
| MORGAN STANLEY 0.00% of their portfolio | 55.4k $8.9k | Added +11.8k |
| MAI Capital Management 0.00% of their portfolio | 51.5k $8.3k | Unchanged |
| Kestra Advisory Services, LLC 0.00% of their portfolio | 44.2k $7.1k | New |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio | 39.1k $6.3k | Reduced -42.6k |
| StoneX Group Inc. 0.00% of their portfolio | 29.5k $4.7k | New |
| COMMONWEALTH EQUITY SERVICES, LLC 0.00% of their portfolio | 25.3k $4.1k | Unchanged |
| JANE STREET GROUP, LLC 0.00% of their portfolio | 23.1k $3.7k | Reduced -323.6k |
| Magnus Financial Group LLC 0.00% of their portfolio | 20.0k $3.2k | Unchanged |
| Tower Research Capital LLC (TRC) 0.00% of their portfolio | 17.0k $2.7k | Added +11.7k |
| Vanguard Global Advisers, LLC 0.00% of their portfolio | 16.6k $2.7k | First filing |
| Mariner, LLC 0.00% of their portfolio | 16.0k $2.6k | New |
| Torrey Growth & Income Advisors 0.00% of their portfolio | 15.7k $2.4k | Unchanged |
| Twin Lakes Capital Management, LLC 0.00% of their portfolio | 7.2k $1.2k | Reduced -1.8k |
| JONES FINANCIAL COMPANIES LLLP 0.00% of their portfolio | 2.0k $306 | Unchanged |
| OSAIC HOLDINGS, INC. 0.00% of their portfolio | 500 $80 | Unchanged |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 472 $76 | Unchanged |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 129 $20 | Unchanged |