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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1662579	C4 Therapeutics Inc.	CCCC	Biological Products, (No Disgnostic Substances) (2836)	475617627

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1824823	Elena Prokupets	C/O C4 Therapeutics, Inc. 490 Arsenal Way #200 Watertown MA 02472		Yes	No	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Disposition	2021-07-29	11,336	$45.00	107,238	No	4	S	Indirect	By Spouse
Common Stock	Disposition	2021-08-02	4,257	$45.01	102,981	No	4	S	Indirect	By Spouse

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Indirect	By Spouse
No	4	S	Indirect	By Spouse

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	592,873	Indirect	By ERP Business Holdings, LP

Footnotes

This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 12, 2021.
The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $45.00 to $45.07. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.
The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $45.00 to $45.15. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.
Shares held by ERP Business Holdings, L.P. The Reporting Person disclaims beneficial ownership of these shares except to the extent of her pecuniary interest therein.