Thomas J. Schuetz - Nov 16, 2025 Form 4 Insider Report for Compass Therapeutics, Inc. (CMPX)

Role: CHIEF EXECUTIVE OFFICER, Director
Signature: /s/ Thomas J. Schuetz
Stock symbol: CMPX
Transactions as of: Nov 16, 2025
Transactions value $: -$212,641
Form type: 4
Date filed: 11/18/2025, 08:30 AM
Previous filing: May 27, 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Schuetz Thomas J.	CHIEF EXECUTIVE OFFICER, Director	C/O COMPASS THERAPEUTICS, INC., 80 GUEST ST., SUITE 601, BOSTON	/s/ Thomas J. Schuetz	2025-11-18	0001591464

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	CMPX	Common Stock	Tax liability	-$213K	-44K	-0.68%	$4.83	6.44M	Nov 16, 2025	Direct	F1, F2

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

Explanation of Responses:

Id	Content
F1	Represents the number of shares withheld by the Issuer to cover tax withholding obligations in connection with the vesting of restricted stock units ("RSUs").
F2	250,000 of the shares represent unvested restricted stock units ("RSU") granted on February 8, 2023. Each RSU represents a contingent right to receive one share of common stock. The award is subject to service-based vesting conditions and vests in four equal annual installments, with the first installment vested on February 8, 2024. 478,125 of the shares represent unvested restricted stock units ("RSU") granted on January 9, 2024. Each RSU represents a contingent right to receive one share of common stock. The award is subject to service-based vesting conditions and vests in four equal annual installments, with the first installment vested on January 9, 2025.

Content

Represents the number of shares withheld by the Issuer to cover tax withholding obligations in connection with the vesting of restricted stock units ("RSUs").

250,000 of the shares represent unvested restricted stock units ("RSU") granted on February 8, 2023. Each RSU represents a contingent right to receive one share of common stock. The award is subject to service-based vesting conditions and vests in four equal annual installments, with the first installment vested on February 8, 2024. 478,125 of the shares represent unvested restricted stock units ("RSU") granted on January 9, 2024. Each RSU represents a contingent right to receive one share of common stock. The award is subject to service-based vesting conditions and vests in four equal annual installments, with the first installment vested on January 9, 2025.