Bradley Sitko - May 18, 2023 Form 4 Insider Report for XOMA Corp (XOMA)

Role: Chief Investment Officer
Signature: /s/ Thomas Burns, Attorney-in-Fact for Bradley Sitko
Stock symbol: XOMA
Transactions as of: May 18, 2023
Transactions value $: $19,500
Form type: 4
Date filed: 5/22/2023, 04:30 PM
Previous filing: May 17, 2023
Next filing: May 25, 2023

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	XOMA	Common Stock	Purchase	$19.5K	+1K	+50%	$19.50	3K	May 19, 2023	Direct
holding	XOMA	Depositary Shares - 8.375% B Cumulative Stock						2K	May 18, 2023	By spouse

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	XOMA	Performance Stock Units	Award	$0	+30.2K		$0.00	30.2K	May 18, 2023	Common Stock	30.2K		Direct	F1

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

Explanation of Responses:

Id	Content
F1	Each Performance Stock Unit ("PSU") represents a contingent right to receive one share of XOMA common stock. The PSUs vest upon XOMA's common stock achieving a specified price per share.