Kenneth Carl Anderson - Jan 6, 2023 Form 4 Insider Report for C4 Therapeutics, Inc. (CCCC)

Role: Director
Signature: /s/ Jolie M. Siegel, Attorney-in-Fact
Stock symbol: CCCC
Transactions as of: Jan 6, 2023
Transactions value $: $2,777
Form type: 4
Date filed: 1/6/2023, 03:55 PM
Previous filing: Jan 4, 2023
Next filing: Apr 4, 2023

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	CCCC	Common Stock	Options Exercise	$565	+268	+0.28%	$2.11	94.7K	Jan 6, 2023	Direct
transaction	CCCC	Common Stock	Options Exercise	$2.21K	+444	+0.47%	$4.98	95.1K	Jan 6, 2023	Direct
holding	CCCC	Common Stock						47.3K	Jan 6, 2023	By Spouse
holding	CCCC	Common Stock						61.3K	Jan 6, 2023	By Kenneth C. Anderson 2016 Grantor Retained Annuity Trust	F1
holding	CCCC	Common Stock						61.3K	Jan 6, 2023	By Cynthia E. Anderson 2016 Grantor Retained Annuity Trust	F2
holding	CCCC	Common Stock						16.9K	Jan 6, 2023	By Kenneth C. Anderson 2015 Irrevocable Trust	F3
holding	CCCC	Common Stock						16.9K	Jan 6, 2023	By Cynthia E. Anderson 2015 Irrevocable Trust	F4

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	CCCC	Stock Option (Right to Buy)	Options Exercise	$0	-268	-20.07%	$0.00	1.07K	Jan 6, 2023	Common Stock	268	$2.11	Direct	F5
transaction	CCCC	Stock Option (Right to Buy)	Options Exercise	$0	-444	-33.28%	$0.00	890	Jan 6, 2023	Common Stock	444	$4.98	Direct	F6

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

Explanation of Responses:

Id	Content
F1	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.
F2	Shares held by 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.
F3	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.
F4	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.
F5	12.5% of the shares underlying this option vested and became exercisable on December 31, 2016, with the remainder vesting in 28 equal quarterly installments thereafter.
F6	The shares underlying this option vest and become exercisable in 12 equal quarterly installments, with the first installment vested on October 1, 2020.