Insider Transactions Reported by 12 Insiders of BioAtla, Inc.

Symbol: BCAB on Nasdaq
Location: San Diego, CA

Quick Takeaways

BCAB - BioAtla, Inc. has 12 insiders with reported activity on this page.
No net insider buy/sell flow is currently reported for the last year.
Recent transaction rows are available for direct filing-level review.

What Changed

No meaningful buy/sell imbalance is currently visible in the one-year window.
Activity will update as new Forms 3/4/5 are filed.

Why This Matters

This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.

Official SEC Source

Filed on Form 4

Issuer insider activity is sourced from SEC Forms 3, 4, and 5.

See Original Filing

Insider trading overview

Last 12 months

Insider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 10 Apr 2025.

Buys

Shares: 0

Insiders: 0

Sells

Shares: 0

Insiders: 0

Net

Shares: 0

Insiders: 0

Window (months)	Buy $	Sell $	Net $
0-3	$0	$0	$0
3-6	$0	$0	$0
6-9	$0	$0	$0
9-12	$0	$0	$0

BioAtla, Inc. executives and other stock owners filed with the SEC include:

Name	Relationship	Holdings Value	Valuation	Report Date
Guy Levy	Former Director	$2,781,493	Mixed	16 Jun 2022
Jay M. Short PhD	Chief Executive Officer, Director	$769,133	Mixed	11 Mar 2026
Scott Andrew Smith	Director	$125,404	Mixed	18 Jun 2025
Eric Sievers	Chief Medical Officer	$107,766	Mixed	10 Mar 2026
Christian Vasquez	Chief Financial Officer	$95,435	Mixed	10 Mar 2026
Richard A. Waldron	Former Chief Financial Officer	$84,824	Mixed	28 Feb 2026
Lawrence Steinman	Director	$30,599	Mixed	18 Jun 2025
Mary Ann Gray	Director	$30,184	Mixed	18 Jun 2025
Eddie Williams	Director	$23,478	Mixed	18 Jun 2025
Sylvia McBrinn	Director	$23,058	Mixed	18 Jun 2025
Susan Moran	Director	$20,399	Mixed	18 Jun 2025
Himalaya Parent LLC	10%+ Owner	$123	Mixed	14 Jun 2021

Top shareholders of BioAtla, Inc. (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.

Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Holder	Source	Role / Reporting	Ownership %	Shares	Holdings Value	12M Net Δ	As of	Details
Guy Levy	3/4/5	Former Director	— class O/S missing	1,130,688	$2,781,493	—	16 Jun 2022	3/4/5
ACORN CAPITAL ADVISORS, LLC	13F	Company	8.3%	4,835,111	$2,756,013	—	31 Dec 2025	13F
HIGHBRIDGE CAPITAL MANAGEMENT LLC	13D/G	—	7.7%	4,839,579	$2,129,415	-$1,104,235	31 Mar 2025	13D/G
ACORN BIOVENTURES, L.P.	13D/G	Anders Hove	8.3%	4,835,111	$2,127,449	$0	15 May 2025	13D/G
OPOKA INVESTMENT FUND Co	13D/G	—	4.8%	2,810,331	$1,933,227	-$507,296	09 Jul 2025	13D/G
Jay M. Short PhD	13D/G 3/4/5	Jay M. Short · Chief Executive Officer, Director	6.6%	3,865,646	$1,700,884	$0	31 Dec 2024	13D/G 3/4/5
VANGUARD GROUP INC	13F	Company	3.3%	1,945,795	$1,105,212	—	31 Dec 2025	13F
MARSHALL WACE, LLP	13F	Company	1.5%	891,580	$508,201	—	31 Dec 2025	13F
MILLENNIUM MANAGEMENT LLC	13D/G 13F	Company	1.9%	1,095,606	$482,067	$0	31 Dec 2024	13D/G 13F
ACADIAN ASSET MANAGEMENT LLC	13F	Company	1.3%	757,671	$429,000	—	31 Dec 2025	13F
RENAISSANCE TECHNOLOGIES LLC	13F	Company	1.2%	707,214	$401,485	—	31 Dec 2025	13F
DEUTSCHE BANK AG\	13F	Company	0.9%	525,353	$299,451	—	31 Dec 2025	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	0.85%	500,328	$284,096	—	31 Dec 2025	13F
BlackRock, Inc.	13F	Company	0.82%	480,933	$273,026	—	31 Dec 2025	13F
JANE STREET GROUP, LLC	13F	Company	0.59%	346,774	$196,863	—	31 Dec 2025	13F
UBS Group AG	13F	Company	0.39%	225,684	$128,188	—	31 Dec 2025	13F
Scott Andrew Smith	3/4/5	Director	0.55%	321,550	$125,404	—	18 Jun 2025	3/4/5
Eric Sievers	3/4/5	Chief Medical Officer	1%	598,705	$107,766	—	10 Mar 2026	3/4/5
ADAR1 Capital Management, LLC	13F	Company	0.31%	183,107	$103,950	—	31 Dec 2025	13F
Christian Vasquez	3/4/5	Chief Financial Officer	0.91%	530,196	$95,435	—	10 Mar 2026	3/4/5
STATE STREET CORP	13F	Company	0.26%	151,377	$85,937	—	31 Dec 2025	13F
Richard A. Waldron	3/4/5	Former Chief Financial Officer	0.59%	343,421	$84,824	—	28 Feb 2026	3/4/5
SIMPLEX TRADING, LLC	13F	Company	0.21%	120,391	$68,382	—	31 Dec 2025	13F
NORTHERN TRUST CORP	13F	Company	0.18%	103,494	$58,754	—	31 Dec 2025	13F
SUSQUEHANNA INTERNATIONAL GROUP, LLP	13F	Company	0.14%	81,687	$46,373	—	31 Dec 2025	13F
TWO SIGMA INVESTMENTS, LP	13F	Company	0.14%	81,330	$46,171	—	31 Dec 2025	13F
PVG ASSET MANAGEMENT CORP	13F	Company	0.12%	69,000	$39,171	—	31 Dec 2025	13F
XTX Topco Ltd	13F	Company	0.1%	60,395	$34,286	—	31 Dec 2025	13F
Virtu Financial LLC	13F	Company	0.09%	55,460	$31,000	—	31 Dec 2025	13F
HRT FINANCIAL LP	13F	Company	0.09%	54,742	$31,000	—	31 Dec 2025	13F
Lawrence Steinman	3/4/5	Director	0.13%	78,459	$30,599	—	18 Jun 2025	3/4/5
Mary Ann Gray	3/4/5	Director	0.13%	77,397	$30,184	—	18 Jun 2025	3/4/5
MAI Capital Management	13F	Company	0.09%	51,504	$29,239	—	31 Dec 2025	13F
MORGAN STANLEY	13F	Company	0.07%	43,653	$24,781	—	31 Dec 2025	13F
Eddie Williams	3/4/5	Director	0.1%	60,200	$23,478	—	18 Jun 2025	3/4/5
Sylvia McBrinn	3/4/5	Director	0.1%	59,125	$23,058	—	18 Jun 2025	3/4/5
Susan Moran	3/4/5	Director	0.09%	52,307	$20,399	—	18 Jun 2025	3/4/5
COLUMBIA ADVISORY PARTNERS LLC	13F	Company	0.04%	26,070	$14,800	—	31 Dec 2025	13F
COMMONWEALTH EQUITY SERVICES, LLC	13F	Company	0.04%	25,300	$14,360	—	31 Dec 2025	13F
Magnus Financial Group LLC	13F	Company	0.03%	20,000	$11,354	—	31 Dec 2025	13F
Torrey Growth & Income Advisors	13F	Company	0.03%	15,687	$8,942	—	31 Dec 2025	13F
Global Wealth Strategies & Associates	13F	Company	0.02%	13,769	$7,817	—	31 Dec 2025	13F
HighTower Advisors, LLC	13F	Company	0.02%	13,000	$7,380	—	31 Dec 2025	13F
Twin Lakes Capital Management, LLC	13F	Company	0.02%	9,000	$5,109	—	31 Dec 2025	13F
SBI Securities Co., Ltd.	13F	Company	0.02%	8,790	$4,990	—	31 Dec 2025	13F
Tower Research Capital LLC (TRC)	13F	Company	0.01%	5,318	$3,019	—	31 Dec 2025	13F
JONES FINANCIAL COMPANIES LLLP	13F	Company	0%	2,000	$1,134	—	31 Dec 2025	13F
ARCADIA INVESTMENT MANAGEMENT CORP/MI	13F	Company	0%	1,403	$797	—	31 Dec 2025	13F
CIBC Private Wealth Group LLC	13F	Company	0%	1,290	$732	—	31 Dec 2025	13F
OSAIC HOLDINGS, INC.	13F	Company	0%	500	$285	—	31 Dec 2025	13F

Recent Insider Transactions by Companies or Individuals for BioAtla, Inc.

Showing up to 300 most recent insider transactions from the last 12 months.

Insider	Symbol	Class	Transaction	%	Shares	Shares Owned	Date	Ownership
Jay M. Short PhD	BCAB	Common Stock	Award	19.3%	430,000	2,659,603	11 Mar 2026	Direct
Eric Sievers	BCAB	Common Stock	Award	66.9%	240,000	598,705	10 Mar 2026	Direct
Christian Vasquez	BCAB	Common Stock	Award	82.7%	240,000	530,196	10 Mar 2026	Direct
Jay M. Short PhD	BCAB	Common Stock	Tax liability	-0.35%	-7,728	2,229,603	28 Feb 2026	Direct
Christian Vasquez	BCAB	Common Stock	Tax liability	-0.62%	-1,802	290,196	28 Feb 2026	Direct
Richard A. Waldron	BCAB	Common Stock	Tax liability	-0.79%	-2,729	343,421	28 Feb 2026	Direct
Eric Sievers	BCAB	Common Stock	Tax liability	-0.87%	-3,140	358,705	28 Feb 2026	Direct
Richard A. Waldron	BCAB	Common Stock	Tax liability	-0.68%	-2,371	346,150	30 Nov 2025	Direct
Eric Sievers	BCAB	Common Stock	Tax liability	-0.75%	-2,729	361,845	30 Nov 2025	Direct
Jay M. Short PhD	BCAB	Common Stock	Tax liability	-0.28%	-6,347	2,237,331	30 Nov 2025	Direct
Christian Vasquez	BCAB	Common Stock	Tax liability	-0.53%	-1,566	291,998	30 Nov 2025	Direct
Jay M. Short PhD	BCAB	Common Stock	Tax liability	-0.28%	-6,347	2,243,678	31 Aug 2025	Direct
Christian Vasquez	BCAB	Common Stock	Tax liability	-0.55%	-1,566	283,564	31 Aug 2025	Direct
Eric Sievers	BCAB	Common Stock	Tax liability	-0.74%	-2,729	364,574	31 Aug 2025	Direct
Richard A. Waldron	BCAB	Common Stock	Tax liability	-0.7%	-2,371	338,521	31 Aug 2025	Direct
Susan Moran	BCAB	Common Stock	Award	81.6%	23,500	52,307	18 Jun 2025	Direct
Eddie Williams	BCAB	Common Stock	Award	64%	23,500	60,200	18 Jun 2025	Direct
Lawrence Steinman	BCAB	Common Stock	Award	42.8%	23,500	78,459	18 Jun 2025	Direct
Mary Ann Gray	BCAB	Common Stock	Award	43.6%	23,500	77,397	18 Jun 2025	Direct
Sylvia McBrinn	BCAB	Common Stock	Award	66%	23,500	59,125	18 Jun 2025	Direct
Scott Andrew Smith	BCAB	Common Stock	Award	7.88%	23,500	321,550	18 Jun 2025	Direct
Jay M. Short PhD	BCAB	Common Stock	Tax liability	-0.28%	-6,347	2,250,025	31 May 2025	Direct
Eric Sievers	BCAB	Common Stock	Tax liability	-0.74%	-2,729	367,303	31 May 2025	Direct
Richard A. Waldron	BCAB	Common Stock	Tax liability	-0.69%	-2,371	340,892	31 May 2025	Direct
Christian Vasquez	BCAB	Common Stock	Tax liability	-0.55%	-1,566	285,130	31 May 2025	Direct

* An asterisk sign (*) next to the price indicates that the price is likely invalid.