C4 Therapeutics, Inc.

CCCC·NASDAQ·$3.49Share Price as of 11/2·$289MMarket Cap as of 11/2

Financials

10-QQ2 ended 06/30/2608/11/26 10-QQ1 ended 03/31/2605/12/26 10-KFY 202502/26/26 10-QQ3 ended 09/30/2511/06/25 10-QQ2 ended 06/30/2508/07/25

Disclosures

8-KCurrent report09/25/26 8-KCurrent report08/11/26 8-KCurrent report06/24/26 8-KCurrent report06/11/26 8-KCurrent report05/15/26

Prospectuses and Registrations

S-8Registration of securities for employees02/26/26 424B5Prospectus supplement12/10/25 S-3Shelf registration11/21/25 424B5Prospectus supplement10/16/25 FWPFree writing prospectus10/16/25

Proxies

DEF 14ADefinitive proxy04/29/26 DEFA14AAdditional proxy materials04/29/26 DEF 14ADefinitive proxy04/29/25 DEFA14AAdditional proxy materials04/29/25 PRE 14APreliminary proxy04/16/25

Ownership

Form 4Insider transaction10/02/26 Form 4Insider transaction10/02/26 Form 4Insider transaction09/21/26 144Proposed sale of securities08/14/26 144Proposed sale of securities08/14/26

Other

ARSAnnual report to shareholders04/29/26 EFFECTRequest for effectiveness12/10/25 CORRESPCorrespondence with the SEC12/08/25 ARSAnnual report to shareholders04/29/25 EFFECTRequest for effectiveness11/13/24