BioAtla, Inc. (BCAB) Ownership
BCAB ownership summary
as of October 21, 2026- Institutions
- 21.4% of shares outstanding
- Insiders
- 5.41% of shares outstanding
- Shares outstanding
- 1.7M
- Float
- 1.4M shares available to trade
- Short interest
- — 139K shares short
- Days to cover
- — short interest up 31.7% vs prior month
- Institutions 21.37%
- Insiders 5.41%
- Other investors 73.23%
BCAB top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard Capital Management, LLC | 1.98% | 1.6M | $2.2M | +1.6M (0.0%) | March 31, 2026 |
| 2 | Acadian Asset Management LLC | 1.48% | 1.2M | $1.7M | +1.2M (0.0%) | March 31, 2026 |
| 3 | Geode Capital Management, LLC | 0.83% | 689K | $934,531 | +188,854 (+37.7%) | March 31, 2026 |
| 4 | Deutsche Bank AG | 0.63% | 525K | $712,377 | −1 (−0.0%) | March 31, 2026 |
| 5 | Renaissance Technologies Corp | 0.61% | 511K | $692,257 | −196,700 (−27.8%) | March 31, 2026 |
| 6 | BlackRock Inc | 0.58% | 481K | $652,142 | −2 (−0.0%) | March 31, 2026 |
| 7 | UBS Group AG | 0.45% | 376K | $509,272 | +149,885 (+66.4%) | March 31, 2026 |
| 8 | Marshall Wace Asset Management Ltd | 0.33% | 278K | $376,466 | −613,950 (−68.9%) | March 31, 2026 |
| 9 | Vanguard Fiduciary Trust Co | 0.33% | 273K | $370,767 | +273,427 (0.0%) | March 31, 2026 |
| 10 | ADAR1 Capital Management LLC | 0.27% | 228K | $309,313 | +45,000 (+24.6%) | March 31, 2026 |
| 11 | State Street Corp | 0.18% | 151K | $205,267 | — | March 31, 2026 |
| 12 | Northern Trust Corp | 0.12% | 103K | $140,338 | — | March 31, 2026 |
| 13 | SIMPLEX TRADING, LLC | 0.09% | 74K | $100,210 | −46,490 (−38.6%) | March 31, 2026 |
| 14 | Millennium Management LLC | 4.24% | 71K | $95,755 | +15,483 (+28.1%) | June 30, 2026 |
| 15 | Stonepine Capital Management Llc | 0.08% | 65K | $88,665 | +65,387 (0.0%) | March 31, 2026 |
| 16 | XTX Topco Ltd | 0.07% | 57K | $76,769 | −3,781 (−6.3%) | March 31, 2026 |
| 17 | Morgan Stanley - Brokerage Accounts | 0.07% | 55K | $75,158 | +11,773 (+27.0%) | March 31, 2026 |
| 18 | Mccormack Advisors International | 0.06% | 52K | $69,839 | — | March 31, 2026 |
| 19 | Susquehanna International Group, LLP | 0.05% | 39K | $52,960 | −42,631 (−52.2%) | March 31, 2026 |
| 20 | StoneX Group Inc | 0.04% | 29K | $39,956 | +29,466 (0.0%) | March 31, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 10 holders added 3.7M shares and 7 cut 904K.
BCAB top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Xtrackers MSCI World Swap ETF 1C | 0.18% | 148K | $200,266 | −930 (−0.6%) | December 31, 2025 |
| 2 | Extended Equity Market Fund E | 0.12% | 97K | $132,209 | — | December 31, 2025 |
| 3 | Extended Equity Market Fund B | 0.12% | 97K | $132,209 | — | December 31, 2025 |
| 4 | NT Ext Eq Mkt Idx Fd DC Lending Tier 5 | 0.03% | 28K | $37,344 | +191 (+0.7%) | March 31, 2026 |
| 5 | BSF Systematic US Eq Abs Ret A2 USD | 0.01% | 11K | $14,275 | — | December 31, 2025 |
| 6 | Vanguard Institutional Extnd Mkt Idx Tr | 0.55% | 9,164 | $12,426 | — | July 31, 2026 |
| 7 | Fidelity Extended Market Index | 0.37% | 6,128 | $8,310 | — | July 31, 2026 |
| 8 | U.S. Equity Market Fund B | 0.01% | 6,014 | $8,155 | +6,014 (0.0%) | December 31, 2025 |
| 9 | U.S. Equity Market Fund | 0.01% | 6,014 | $8,155 | — | December 31, 2025 |
| 10 | Fidelity Nasdaq Composite Index | 0.18% | 2,943 | $3,991 | +2,943 (0.0%) | July 31, 2026 |
| 11 | Blackrock Extended Mkt Fund CF | 0.12% | 1,949 | $2,643 | — | May 31, 2026 |
| 12 | NT Ext Equity Mkt Index Fund - NL | 0.11% | 1,849 | $2,507 | +1,226 (+196.8%) | June 30, 2026 |
| 13 | BlackRock Extended Equity Market Fund K | 0.10% | 1,656 | $2,246 | −4 (−0.2%) | June 30, 2026 |
| 14 | Fidelity Total Market Index | 0.10% | 1,610 | $2,183 | — | July 31, 2026 |
| 15 | Fidelity Series Total Market Index | 0.09% | 1,456 | $1,974 | — | July 31, 2026 |
| 16 | Northern Trust Extended Eq Market Idx | 0.08% | 1,395 | $1,892 | +1,367 (+4,882.1%) | June 30, 2026 |
| 17 | NT Ext Equity Mkt Index Fund - Lending | 0.08% | 1,395 | $1,892 | −1 (−0.1%) | June 30, 2026 |
| 18 | NT Ext Equity Mkt Idx Fd - DC - NL - T2 | 0.08% | 1,341 | $1,818 | +853 (+174.8%) | June 30, 2026 |
| 19 | Spartan Total Market Index Pool A1 | 0.04% | 677 | $918 | — | July 31, 2026 |
| 20 | Extended Equity Market Fund M | 0.01% | 199 | $270 | +4 (+2.1%) | June 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
BCAB insider transactions
latest 4| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2023-12-26 | Sylvia Mcbrinn | Buy | $116.50 | 80 | $9,320 |
| 2023-12-20 | Jay M Phd Short | Buy | $107.00 | 1,000 | $107,000 |
| 2023-12-19 | Lawrence Steinman | Buy | $102.50 | 400 | $41,000 |
| 2023-09-08 | Sylvia Mcbrinn | Buy | $127.00 | 40 | $5,080 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
BCAB shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns BCAB
Institutional investors own 21.4% of BioAtla's shares and insiders 5.41%. The largest holder is Vanguard Capital Management, LLC with 1.98% of the shares (1.6M), as of March 31, 2026. Among the top 20 institutions, 10 added shares and 7 reduced their stake in the latest filings. The share count rose 172.5% since 2019.
Related: BCAB analyst forecast, BCAB key metrics. See the BCAB stock overview for the latest quote and news.
BCAB ownership FAQ
Who owns the most BioAtla stock?
The largest shareholders of BioAtla are Vanguard Capital Management, LLC (1.98%), Acadian Asset Management LLC (1.48%), Geode Capital Management, LLC (0.83%), Deutsche Bank AG (0.63%), Renaissance Technologies Corp (0.61%).
What percentage of BioAtla is owned by institutions?
Institutions hold 21.4% of BioAtla's shares outstanding; insiders hold 5.41%.
Which funds own BioAtla?
The largest fund holders of BioAtla are Xtrackers MSCI World Swap ETF 1C (0.18%), Extended Equity Market Fund E (0.12%), Extended Equity Market Fund B (0.12%), NT Ext Eq Mkt Idx Fd DC Lending Tier 5 (0.03%), BSF Systematic US Eq Abs Ret A2 USD (0.01%).
Are insiders buying or selling BioAtla?
Of the latest 4 reported insider transactions in BioAtla (since September 8, 2023), 4 were purchases and 0 were sales.
How many shares of BioAtla are outstanding?
BioAtla has 1.7M shares outstanding, of which 1.4M are in the public float.