Bart Jan Cornelissen - 02 Mar 2026 Form 4 Insider Report for Xencor Inc (XNCR)

Role: SR. VICE PRESIDENT & CFO
Signature: /s/ Celia E. Eckert, Attorney-in-Fact
Issuer symbol: XNCR
Transactions as of: 02 Mar 2026
Net transactions value: $0
Form type: 4
Filing time: 04 Mar 2026, 19:43:43 UTC
Previous filing: 14 Apr 2025
Next filing: 09 Mar 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Cornelissen Bart Jan	SR. VICE PRESIDENT & CFO	C/O XENCOR, INC., 465 N HALSTEAD STREET, SUITE 200, PASADENA	/s/ Celia E. Eckert, Attorney-in-Fact	04 Mar 2026	0002018934

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	XNCR	Common Stock	Award		+19,458	+31%	$0.000000^*	81,914	02 Mar 2026	Direct	F1, 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	XNCR	Stock Option (Right to Buy)	Award		+116,750		$0.000000^*	116,750	02 Mar 2026	Common Stock	116,750	$12.30	Direct	F3

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

Explanation of Responses:

Id	Content
F1	Represents restricted stock units that vest as follows: 1/3 of the shares vest on the first, second and third anniversaries of the date of grant, subject to the Reporting Person's continuous service to the Issuer on and through each applicable vesting date, inclusive.
F2	Includes the following shares acquired by the Reporting Person pursuant to the Issuer's Employee Stock Purchase Plan: 1,108 shares acquired on June 10, 2025.
F3	25% of the shares subject to the option shall vest on the one year anniversary of March 2, 2026 (the "Vesting Commencement Date"), and 1/48th of the shares shall vest monthly thereafter, such that the option shall be fully vested and exercisable on the four year anniversary of the Vesting Commencement Date, subject to the Reporting Person's continuous service to the Issuer on and through each applicable vesting date, inclusive.