Carl L. Gordon - 02 Jan 2026 Form 4 Insider Report for Compass Therapeutics, Inc. (CMPX)

Role: Director
Signature: /s/ Neil Lerner, attorney-in-fact
Issuer symbol: CMPX
Transactions as of: 02 Jan 2026
Net transactions value: $0
Form type: 4
Filing time: 05 Jan 2026, 16:32:19 UTC
Previous filing: 18 Dec 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
GORDON CARL L	Director	C/O COMPASS THERAPEUTICS, INC., 80 GUEST STREET, SUITE 601, BOSTON	/s/ Neil Lerner, attorney-in-fact	05 Jan 2026	0001282930

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	CMPX	Stock Option (Right to Buy)	Award	$0	+90,000		$0.000000	90,000	02 Jan 2026	Common Stock	90,000	$5.17	Direct	F1, F2

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

Explanation of Responses:

Id	Content
F1	This grant vests in full upon the earlier of (i) June 10, 2026 or (ii) the date of the next annual meeting of the Company's stockholders.
F2	The Reporting Person is a member of OrbiMed Advisors LLC ("OrbiMed Advisors"). Pursuant to an agreement with OrbiMed Advisors, the Reporting Person is obligated to transfer any securities issued under any stock options or other awards, or the economic benefit thereof, to OrbiMed Advisors and OrbiMed Capital GP V LLC, which will in turn ensure that such securities or economic benefits are provided to OrbiMed Private Investments V-KA, LP.

Content

This grant vests in full upon the earlier of (i) June 10, 2026 or (ii) the date of the next annual meeting of the Company's stockholders.

The Reporting Person is a member of OrbiMed Advisors LLC ("OrbiMed Advisors"). Pursuant to an agreement with OrbiMed Advisors, the Reporting Person is obligated to transfer any securities issued under any stock options or other awards, or the economic benefit thereof, to OrbiMed Advisors and OrbiMed Capital GP V LLC, which will in turn ensure that such securities or economic benefits are provided to OrbiMed Private Investments V-KA, LP.