SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* ZWEIFACH SANFORD S (Last) (First) (Middle) 3675 MARKET STEET, SUITE 200 (Street) PHILADELPHIA PA 19104 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol Carisma Therapeutics Inc. [ CARM ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X Director 10% Owner Officer (give title below) Other (specify below)
	3. Date of Earliest Transaction (Month/Day/Year) 03/07/2023
	4. If Amendment, Date of Original Filed (Month/Day/Year)	6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common stock	03/07/2023		A		413	A	(1)(2)	413	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option (Right to Buy)	$1.46	03/07/2023		A		184,621		(3)	11/08/2031	Common Stock	184,621	(1)(2)	184,621	D

Explanation of Responses:

1. In connection with the merger of Sesen Bio, Inc. ("Sesen Bio") and private company CARISMA Therapeutics Inc. ("Carisma"), pursuant to the Agreement and Plan of Merger and Reorganization dated as of September 20, 2022, as amended by the First Amendment thereto dated as of December 29, 2022 and the Second Amendment thereto dated as of February 13, 2023 (as amended, the "Merger Agreement"), which closed on March 7, 2023 (the "Closing"), (i) each share of Carisma common stock was converted into the right to receive 1.8994 shares of Sesen Bio common stock (the "Exchange Ratio") and (ii) each outstanding and unexercised option to purchase shares of Carisma common stock converted into an option to purchase shares of Sesen Bio common stock, with necessary adjustments to reflect the Exchange Ratio but otherwise the same terms and conditions.

2. The Exchange Ratio gives effect to the 1-for-20 reverse stock split of Sesen Bio's common stock. On the Closing date, the closing price of Sesen Bio common stock was $0.6288 (unadjusted). Upon Closing, Sesen Bio was renamed "Carisma Therapeutics Inc."

3. The shares underlying this option vest over four years, with 25% of the shares vested on November 9, 2022 and the remaining shares vesting in 36 equal monthly installments thereafter, subject to the Reporting Person's continued service.

	/s/ Richard Morris, as Attorney-in-Fact for Sanford Zweifach	03/09/2023
	** Signature of Reporting Person	Date
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