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* Anderson Kenneth Carl (Last) (First) (Middle) C/O C4 THERAPEUTICS, INC. 490 ARSENAL WAY #200 (Street) WATERTOWN MA 02472 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol C4 Therapeutics, Inc. [ CCCC ]	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) 01/22/2021
	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	01/22/2021		M		538	A	$2.11	80,914	D
Common Stock	01/22/2021		M		121	A	$2.11	81,035	D
Common Stock	01/22/2021		M		889	A	$4.98	81,924	D
Common Stock								45,038	I	By Spouse
Common Stock								63,543	I	By Kenneth C. Anderson 2016 Grantor Retained Annuity Trust(1)
Common Stock								63,543	I	By Cynthia E. Anderson 2016 Grantor Retained Annuity Trust(2)
Common Stock								16,939	I	By Kenneth C. Anderson 2015 Irrevocable Trust(3)
Common Stock								16,939	I	By Cynthia E. Anderson 2015 Irrevocable Trust(4)

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)	$2.11	01/22/2021		M			538	(5)	07/12/2026	Common Stock	538	$0.00	3,207	D
Stock Option (Right to Buy)	$2.11	01/22/2021		M			121(6)	(7)	07/12/2026	Common Stock	121(6)	$0.00	0	D
Stock Option (Right to Buy)	$4.98	01/22/2021		M			889	(8)	07/02/2030	Common Stock	889	$0.00	4,446	D

Explanation of Responses:

1. Shares held by the Kenneth C. Anderson 2016 Grantor Retained Annuity Trust. The Reporting Person disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein.

2. Shares held the Cynthia E. Anderson 2016 Grantor Retained Annuity Trust. The Reporting Person disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein.

3. Shares held by the Kenneth C. Anderson 2015 Irrevocable Trust. The Reporting Person disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein.

4. Shares held by the Cynthia E. Anderson 2015 Irrevocable Trust. The Reporting Person disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein.

5. Represents underlying unexercised stock options that were granted on July 13, 2016. The terms of the original grant provide that 12.5% of this option vested and became exercisable on December 31, 2016, with the remainder vesting in 28 equal quarterly installments thereafter.

6. The Form 3 filed on October 1, 2020 included an incorrect number of underlying securities in Table II, Column 3 (118).

7. Represents underlying unexercised stock options that were granted on July 13, 2016. The terms of the original grant provide that 20% of this option vested and became exercisable on January 1, 2017, with the remainder vesting in 16 equal quarterly installments thereafter.

8. This option shall vest and become exercisable in 12 equal quarterly installments, with the first installment vesting on October 1, 2020.

Remarks:

	/s/ Jolie M. Siegel, Attorney-in-Fact	01/26/2021
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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