Kathryn Penkus Corzo - 31 Oct 2025 Form 4 Insider Report for Marker Therapeutics, Inc. (MRKR)

Role: Director
Signature: /s/ Julio C. Esquivel as Attorney-In-Fact for Kathryn Penkus Corzo
Issuer symbol: MRKR
Transactions as of: 31 Oct 2025
Net transactions value: $0
Form type: 4
Filing time: 04 Nov 2025, 17:09:13 UTC
Previous filing: 03 Nov 2023
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Corzo Kathryn Penkus	Director	MARKER THERAPEUTICS, INC., 2450 HOLCOMBE BLVD, TMC PARTNERS OFFICE, HOUSTON	/s/ Julio C. Esquivel as Attorney-In-Fact for Kathryn Penkus Corzo	04 Nov 2025	0001884123

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	MRKR	Stock Option (Right to Buy)	Award	$0	+147,611		$0.000000	147,611	31 Oct 2025	Common Stock	147,611	$0.9877	Direct	F1

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

Explanation of Responses:

Id	Content
F1	Represents options granted under the Company's 2020 Omnibus Stock Ownership Plan. The shares vest equally over thirty six (36) monthly installments, subject to the Reporting Person's continued service as a director. The option exercise price is the closing price on the date of the grant, October 31, 2025.