JAY M. SHORT - 10 Feb 2023 Form 4 Insider Report for BioAtla, Inc. (BCAB)

Role: Chief Executive Officer, Director, 10%+ Owner
Signature: /s/ Christian Vasquez, as Attorney-in-Fact for Jay M. Short
Issuer symbol: BCAB
Transactions as of: 10 Feb 2023
Transactions value $: $-8,346
Form type: 4
Filing time: 01 Mar 2023, 17:34:05 UTC
Previous filing: 02 Feb 2023
Next filing: 30 Mar 2023
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	BCAB	Common Stock	Tax liability	$-8,346	-2,888	-0.21%	$2.89	1,371,587	28 Feb 2023	Direct	F1
holding	BCAB	Common Stock						793,547	10 Feb 2023	By Spouse
holding	BCAB	Common Stock						258,727	10 Feb 2023	By Carolyn Short 2020 Irrevocable Gift Trust
holding	BCAB	Common Stock						258,727	10 Feb 2023	By Jay Short 2020 Irrevocable Gift Trust
holding	BCAB	Common Stock						302,324	10 Feb 2023	By Capia IP, LLC
holding	BCAB	Common Stock						50	10 Feb 2023	By Himalaya Parent LLC	F2

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	BCAB	Employee Stock Option (right to buy)	Award	$0	+850,000		$0.000000	850,000	10 Feb 2023	Common Stock	850,000	$3.65	Direct	F3

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

Explanation of Responses:

Id	Content
F1	This transaction is not a sale of shares by the Reporting Person. Instead, this represents shares that have been withheld by the Issuer to satisfy its income tax and withholding and remittance obligations in connection with the vesting and net settlement of previously reported restricted stock units.
F2	The Reporting Person and his spouse are the managers of Himalaya Parent LLC and collectively make investment decisions on the behalf of the entity. The Reporting Person and his spouse disclaim beneficial ownership of the reported securities except to the extent of his or her pecuniary interest therein.
F3	The option vests over a period of four years, with 25% of the shares underlying the option vesting on the first anniversary of the date of grant, and the remainder vesting in 36 substantially equal monthly installments thereafter, subject to the reporting person's continued service to the company through the applicable vesting dates.