Sean A. McCarthy - Sep 20, 2023 Form 4 Insider Report for CytomX Therapeutics, Inc. (CTMX)

Role: CEO, Director
Signature: /s/ Lloyd Rowland, as Attorney-in-Fact for Sean A. McCarthy
Stock symbol: CTMX
Transactions as of: Sep 20, 2023
Transactions value $: -$18,987
Form type: 4
Date filed: 9/22/2023, 08:13 PM
Previous filing: May 23, 2023
Next filing: Dec 19, 2023
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	CTMX	Common Stock	Award	$0	+40K	+9.87%	$0.00	445K	Sep 20, 2023	Direct	F1, F2
transaction	CTMX	Common Stock	Sale	-$19K	-14.6K	-3.28%	$1.30	431K	Sep 22, 2023	Direct	F2, F3
holding	CTMX	Common Stock						93.2K	Sep 20, 2023	See footnote	F4

Showing 1 to 3 of 3 entries

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

Explanation of Responses:

Id	Content
F1	Represents Performance Stock Units ("PSUs") initially granted on October 24, 2021 that were subject to a performance-based vesting condition. The second milestone vesting condition was determined to be satisfied upon which the remaining 50% of the PSUs vested.
F2	Includes 161,250 restricted stock units.
F3	The shares were sold solely to satisfy tax or other government withholding obligations in connection with the vesting of PSUs.
F4	Shares held by Sean A. McCarthy 2018 Trust, of which Reporting Person is trustee.