Arjun Prasad - 02 Jan 2026 Form 4 Insider Report for Compass Therapeutics, Inc. (CMPX)

Role: Chief Commercial Officer
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, 16:33:32 UTC
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Prasad Arjun	Chief Commercial Officer	C/O COMPASS THERAPEUTICS, INC., 80 GUEST STREET, SUITE 601, BOSTON	/s/ Neil Lerner, Attorney-in-fact	05 Jan 2026	0002102138

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	+1,000,000		$0.000000	1,000,000	02 Jan 2026	COMMON STOCK	1,000,000	$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	The options were granted pursuant to the Compass Therapeutics, Inc. 2025 Inducement Plan as a material inducement to the Reporting Person's acceptance of employment with the Issuer in accordance with Nasdaq Rule 5635(c)(4).
F2	The options will vest over four years, as follows: 25% of the shares underlying the option will vest and become exercisable on January 2, 2027, with the remaining 75% vesting in 36 substantially equal monthly installments thereafter.