BioAtla, Inc. (BCAB) shareholders
BCABOTCBiological Products, (No Diagnostic Substances)Fiscal year ends December 31
$1.31−0.05 (-3.68%)
Close on Oct 19, 2026Market cap $2.18MP/E –Yield –
Ownership
Institutional holdings as of Jun 30, 2026, from 13F filings
Held by institutions
11.2%
0M of 2M shares
Institutional holders
20
19 new, 1 sold out
Net institutional buying
0M
In Q2 2026
Insider trades, 12 months
0 buys · 0 sales
Open-market trades only
Shares held by institutions
Holders of more than 5%
Latest Schedule 13D (active) or 13G (passive) filed by each holder
| Holder | Shares | % of class | Filing | As of |
|---|---|---|---|---|
| Highbridge Capital Management, LLC | 4,839,579 | 7.70% | 13G (passive) amendment | Mar 31, 2025 |
| Anders Hove | 4,835,111 | 8.30% | 13G (passive) amendment | May 15, 2025 |
| Jay M. Short | 3,865,646 | 6.60% | 13G (passive) amendment | Dec 31, 2024 |
Top institutional holders
13F holdings as of Jun 30, 2026
| Holder | Shares | % of BCAB | Value | Change | % of portfolio |
|---|---|---|---|---|---|
| Millennium Management LLC | 70,616 | 4.24% | $292.35K | New | 0.00% |
| Lido Advisors, LLC | 16,656 | 1.00% | $68.96K | New | 0.00% |
| Stonepine Capital Management, LLC | 16,432 | 0.99% | $68.03K | New | 0.04% |
| Acadian Asset Management LLC | 14,294 | 0.86% | $58.00K | New | 0.00% |
| Hrt Financial LP | 13,276 | 0.80% | $54.00K | New | 0.00% |
| Geode Capital Management, LLC | 12,819 | 0.77% | $53.08K | New | 0.00% |
| Deutsche Bank AG\ | 10,556 | 0.63% | $43.70K | New | 0.00% |
| BlackRock, Inc. | 9,616 | 0.58% | $39.81K | New | 0.00% |
| Vanguard Capital Management LLC | 9,164 | 0.55% | $37.94K | New | 0.00% |
| UBS Group AG | 6,201 | 0.37% | $25.67K | New | 0.00% |
| Vanguard Fiduciary Trust Co | 4,730 | 0.28% | $19.58K | New | 0.00% |
| Morgan Stanley | 1,108 | 0.07% | $4.59K | New | 0.00% |
| Tower Research Capital LLC (TRC) | 863 | 0.05% | $3.57K | New | 0.00% |
| Forum Finance Group S.A. | 400 | 0.02% | $1.00K | New | 0.00% |
| SBI Securities Co., Ltd. | 267 | 0.02% | $1.11K | +45 | 0.00% |
| Twin Lakes Capital Management, LLC | 144 | 0.01% | $596 | New | 0.00% |
| JPMorgan Chase & Co | 121 | 0.01% | $464 | New | 0.00% |
| Barclays PLC | 101 | 0.01% | $418 | New | 0.00% |
| Jones Financial Companies Lllp | 40 | 0.00% | $147 | New | 0.00% |
| Bnp Paribas Arbitrage, Snc | 7 | 0.00% | $29 | New | 0.00% |
Institutional buying and selling by quarter
Positions opened, added to, reduced and closed by 13F filers
| Quarter | Holders | Shares held | % of shares | New / added | Reduced / closed | Shares bought | Shares sold |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 20 | 0M | 11.2% | 19 / 1 | 0 / 1 | 0M | 0M |
| Q1 2026 | 2 | 0M | 0.3% | 2 / 0 | 0 / 0 | 0M | 0M |
Top mutual fund and ETF holders
Latest monthly portfolio reports (Form N-PORT)
7 funds held BCAB in Q2 2026, 50% of their shares through ETFs. Each fund counts once per quarter, from its quarter-end report.
| Fund | Shares | % of BCAB | Value | % of fund | As of |
|---|---|---|---|---|---|
| Vanguard Extended Market Index Fund | 9,164 | 0.55% | $37.94K | 0.00% | Jun 30, 2026 |
| Fidelity Extended Market Index Fund | 6,128 | 0.37% | $24.08K | 0.00% | May 31, 2026 |
| Fidelity Total Market Index Fund | 1,610 | 0.10% | $6.33K | 0.00% | May 31, 2026 |
| Fidelity Series Total Market Index Fund | 1,456 | 0.09% | $5.72K | 0.00% | May 31, 2026 |
| Fidelity Nasdaq Composite Index Fund | 165 | 0.01% | $648 | 0.00% | May 31, 2026 |
| State Street Balanced Index Fund | 25 | 0.00% | $104 | 0.00% | Jun 30, 2026 |
| Blackstone Alternative Multi-Strategy Fund | -36 | -0.00% | -$149 | -0.00% | Jun 30, 2026 |
Officers, directors and major owners
People who filed Forms 3, 4 or 5 in the last two years
| Name | Role | Shares owned | % of shares | Latest filing |
|---|---|---|---|---|
| Jay M. Short Phd | Chief Executive Officer, Director | 84,300 | 5.06% | Sep 2, 2026 |
| Eric Sievers | Chief Medical Officer | 11,346 | 0.68% | Sep 2, 2026 |
| Christian Vasquez | Chief Financial Officer | 10,476 | 0.63% | Sep 2, 2026 |
| Richard A. Waldron | Former Chief Financial Officer | 343,421 | 20.61% | Mar 2, 2026 |
| Eddie Williams | Director | 60,200 | 3.61% | Jun 18, 2025 |
| Mary Ann Gray | Director | 77,397 | 4.65% | Jun 18, 2025 |
| Scott Andrew Smith | Director | 321,550 | 19.30% | Jun 18, 2025 |
| Susan Moran | Director | 52,307 | 3.14% | Jun 18, 2025 |
| Lawrence Steinman | Director | 78,459 | 4.71% | Jun 18, 2025 |
| Sylvia McBrinn | Director | 59,125 | 3.55% | Jun 18, 2025 |
Insider trades
Common stock transactions reported on Form 4, newest first
| Insider | Date | Transaction | Shares | Price | Value | Shares after |
|---|---|---|---|---|---|---|
| Jay M. Short Phd Chief Executive Officer, Director | Aug 31, 2026 | Tax withholding | −259 | $1.69 | $438 | 52,035 |
| Christian Vasquez Chief Financial Officer | Aug 31, 2026 | Tax withholding | −71 | $1.69 | $120 | 10,476 |
| Eric Sievers Chief Medical Officer | Aug 31, 2026 | Tax withholding | −134 | $1.69 | $226 | 11,346 |
| Eric Sievers Chief Medical Officer | May 31, 2026 | Tax withholding | −134 | $3.93 | $527 | 11,840 |
| Jay M. Short Phd Chief Executive Officer, Director | May 31, 2026 | Tax withholding | −259 | $3.93 | $1.02K | 52,294 |
| Christian Vasquez Chief Financial Officer | May 31, 2026 | Tax withholding | −82 | $3.93 | $322 | 10,347 |
| Jay M. Short Phd Chief Executive Officer, Director | Mar 12, 2026 | Tax withholding | −639 | $0.17 | $109 | 52,553 |
| Eric Sievers Chief Medical Officer | Mar 11, 2026 | Tax withholding | −360 | $0.17 | $61 | 11,614 |
| Christian Vasquez Chief Financial Officer | Mar 11, 2026 | Tax withholding | −175 | $0.17 | $30 | 10,429 |
| Jay M. Short Phd Chief Executive Officer, Director | Mar 11, 2026 | Award | +430,000 | – | – | 2,659,603 |
| Christian Vasquez Chief Financial Officer | Mar 10, 2026 | Award | +240,000 | – | – | 530,196 |
| Eric Sievers Chief Medical Officer | Mar 10, 2026 | Award | +240,000 | – | – | 598,705 |
| Jay M. Short Phd Chief Executive Officer, Director | Feb 28, 2026 | Tax withholding | −7,728 | $0.25 | $1.93K | 2,229,603 |
| Richard A. Waldron Former Chief Financial Officer | Feb 28, 2026 | Tax withholding | −2,729 | $0.25 | $682 | 343,421 |
| Eric Sievers Chief Medical Officer | Feb 28, 2026 | Tax withholding | −3,140 | $0.25 | $785 | 358,705 |
| Christian Vasquez Chief Financial Officer | Feb 28, 2026 | Tax withholding | −1,802 | $0.25 | $451 | 290,196 |
| Jay M. Short Phd Chief Executive Officer, Director, 10% owner | Nov 30, 2025 | Tax withholding | −6,347 | $0.90 | $5.71K | 2,237,331 |
| Eric Sievers Chief Medical Officer | Nov 30, 2025 | Tax withholding | −2,729 | $0.90 | $2.46K | 361,845 |
| Richard A. Waldron Chief Financial Officer | Nov 30, 2025 | Tax withholding | −2,371 | $0.90 | $2.13K | 346,150 |
| Christian Vasquez See Remarks | Nov 30, 2025 | Tax withholding | −1,566 | $0.90 | $1.41K | 291,998 |
| Christian Vasquez See Remarks | Aug 31, 2025 | Tax withholding | −1,566 | $0.46 | $720 | 283,564 |
| Jay M. Short Phd Chief Executive Officer, Director, 10% owner | Aug 31, 2025 | Tax withholding | −6,347 | $0.46 | $2.92K | 2,243,678 |
| Eric Sievers Chief Medical Officer | Aug 31, 2025 | Tax withholding | −2,729 | $0.46 | $1.26K | 364,574 |
| Richard A. Waldron Chief Financial Officer | Aug 31, 2025 | Tax withholding | −2,371 | $0.46 | $1.09K | 338,521 |
| Eddie Williams Director | Jun 18, 2025 | Award | +23,500 | – | – | 60,200 |
| Susan Moran Director | Jun 18, 2025 | Award | +23,500 | – | – | 52,307 |
| Scott Andrew Smith Director | Jun 18, 2025 | Award | +23,500 | – | – | 321,550 |
| Sylvia McBrinn Director | Jun 18, 2025 | Award | +23,500 | – | – | 59,125 |
| Lawrence Steinman Director | Jun 18, 2025 | Award | +23,500 | – | – | 78,459 |
| Mary Ann Gray Director | Jun 18, 2025 | Award | +23,500 | – | – | 77,397 |
| Eric Sievers Chief Medical Officer | May 31, 2025 | Tax withholding | −2,729 | $0.41 | $1.12K | 367,303 |
| Richard A. Waldron Chief Financial Officer | May 31, 2025 | Tax withholding | −2,371 | $0.41 | $972 | 340,892 |
| Jay M. Short Phd Chief Executive Officer, Director, 10% owner | May 31, 2025 | Tax withholding | −6,347 | $0.41 | $2.60K | 2,250,025 |
| Christian Vasquez See Remarks | May 31, 2025 | Tax withholding | −1,566 | $0.41 | $642 | 285,130 |
| Jay M. Short Phd Chief Executive Officer, Director, 10% owner | Mar 12, 2025 | Award | +431,000 | – | – | 2,256,372 |
| Eric Sievers Chief Medical Officer | Mar 11, 2025 | Award | +175,000 | – | – | 370,032 |
| Christian Vasquez See Remarks | Mar 11, 2025 | Award | +85,000 | – | – | 276,696 |
| Richard A. Waldron Chief Financial Officer | Mar 11, 2025 | Award | +100,000 | – | – | 333,263 |
| Jay M. Short Phd Chief Executive Officer, Director, 10% owner | Feb 16, 2025 | Tax withholding | −30,911 | $0.46 | $14.22K | 1,825,372 |
| Christian Vasquez See Remarks | Feb 15, 2025 | Tax withholding | −7,189 | $0.46 | $3.31K | 191,696 |
| Eric Sievers Chief Medical Officer | Feb 15, 2025 | Tax withholding | −12,530 | $0.46 | $5.76K | 195,032 |
| Richard A. Waldron Chief Financial Officer | Feb 15, 2025 | Tax withholding | −10,887 | $0.46 | $5.01K | 233,263 |
| Scott Andrew Smith Director | Aug 31, 2024 | Tax withholding | −2,181 | $1.77 | $3.86K | 298,050 |
| Eric Sievers Chief Medical Officer | Aug 31, 2024 | Tax withholding | −572 | $1.77 | $1.01K | 207,562 |
| Eric Sievers Chief Medical Officer | Jul 31, 2024 | Tax withholding | −572 | $1.81 | $1.04K | 208,134 |
| Scott Andrew Smith Director | Jul 31, 2024 | Tax withholding | −2,181 | $1.81 | $3.95K | 300,231 |
| Scott Andrew Smith Director | Jun 30, 2024 | Tax withholding | −2,181 | $1.37 | $2.99K | 302,412 |
| Eric Sievers Chief Medical Officer | Jun 30, 2024 | Tax withholding | −572 | $1.37 | $784 | 208,706 |
| Susan Moran Director | Jun 13, 2024 | Award | +16,500 | – | – | 28,807 |
| Lawrence Steinman Director | Jun 13, 2024 | Award | +16,500 | – | – | 54,959 |
| Scott Andrew Smith Director | Jun 13, 2024 | Award | +16,500 | – | – | 304,593 |
| Eddie Williams Director | Jun 13, 2024 | Award | +16,500 | – | – | 36,700 |
| Mary Ann Gray Director | Jun 13, 2024 | Award | +16,500 | – | – | 53,897 |
| Sylvia McBrinn Director | Jun 13, 2024 | Award | +16,500 | – | – | 35,625 |
| Scott Andrew Smith Director | May 31, 2024 | Tax withholding | −2,181 | $1.51 | $3.29K | 288,093 |
| Eric Sievers Chief Medical Officer | May 31, 2024 | Tax withholding | −572 | $1.51 | $864 | 209,278 |
| Scott Andrew Smith Director | Apr 30, 2024 | Tax withholding | −2,181 | $2.26 | $4.93K | 290,274 |
| Eric Sievers Chief Medical Officer | Apr 30, 2024 | Tax withholding | −572 | $2.26 | $1.29K | 209,850 |
| Scott Andrew Smith Director | Mar 31, 2024 | Tax withholding | −2,181 | $3.44 | $7.50K | 292,455 |
| Eric Sievers Chief Medical Officer | Mar 31, 2024 | Tax withholding | −572 | $3.44 | $1.97K | 210,422 |
Awards, option exercises, tax withholding and gifts are shown alongside open-market buys and sales. Each name links to the filing on SEC EDGAR.
Short interest
Shares sold short and not yet bought back, as of Oct 30, 2026 (FINRA, reported twice a month)
Short % of shares outstanding
–
0M shares short
Days to cover
6.2
At 0M shares a day
Change since last report
-1.3%
From 0M shares
Short volume, 20 days
48.9%
Of volume reported to FINRA
Shares sold short, last 12 months
Short sale volume counts trades marked short on any given day, including market-maker hedging, so it runs far higher than the share of BioAtla's stock actually held short. Settlement fails (shares not delivered on time) peaked at 35,333 shares on Aug 31, 2026 over the last 90 days.
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