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

Reporting relationship: SR. VICE PRESIDENT & CFO
Issuer ticker: XNCR
Reported as of: 02 Mar 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 04 Mar 2026, 19:43:43 UTC
Prior SEC filing: 14 Apr 2025
Next SEC filing: 09 Mar 2026
Source filing: View source filing
Reporting owner signature: /s/ Celia E. Eckert, Attorney-in-Fact

Key filing fact

Bart Jan Cornelissen filed Form 4 for Xencor Inc (XNCR) on 04 Mar 2026.

Key facts

This page summarizes Bart Jan Cornelissen's Form 4 filing for Xencor Inc (XNCR).
2 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 04 Mar 2026, 19:43.

Change

Previous filing in this sequence was filed on 14 Apr 2025.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0002018934 Primary reporting owner

Cornelissen Bart Jan

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

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

XNCR transaction

Common Stock

Award

Transaction value
Shares: +19,458
Change %: +31%
Price: $0.000000^*
Shares after: 81,914
Date: 02 Mar 2026
Ownership: Direct
Footnotes: F1, F2

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

XNCR transaction Derivative

Stock Option (Right to Buy)

Award

Transaction value
Shares: +116,750
Change %
Price: $0.000000^*
Shares after: 116,750
Date: 02 Mar 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 116,750
Exercise price: $12.30
Footnotes: F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote 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.

Footnote 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.

Footnote 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.