Scott A. Smith - Feb 10, 2023 Form 4 Insider Report for BioAtla, Inc. (BCAB)

Role: Former President, Director
Signature: /s/ Christian Vasquez, as Attorney-in-Fact for Scott A. Smith
Stock symbol: BCAB
Transactions as of: Feb 10, 2023
Transactions value $: -$5,337
Form type: 4
Date filed: 3/1/2023, 05:33 PM
Previous filing: Feb 2, 2023
Next filing: Apr 3, 2023

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	BCAB	Common Stock	Tax liability	-$5.34K	-1.79K	-0.56%	$2.98	317K	Feb 28, 2023	Direct	F1

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	+350K		$0.00	350K	Feb 10, 2023	Common Stock	350K	$3.65	Direct	F2

* 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 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.