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CIK 0001662579 · Non-accelerated filer<br>Smaller reporting company

C4 Therapeutics, Inc.

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Ticker
CCCC
Exchange
Nasdaq
Industry
Biological Products, (No Diagnostic Substances)
FY end
Dec 31
Incorporated
DE
Entity type
operating
EIN
475617627
Phone
(617) 231-0700
Business address
490 ARSENAL WAY, SUITE 120, WATERTOWN, MA, 02472
Open-market buys, last 90 days
$0
in 0 filings
Open-market sales, last 90 days
$0
in 0 filings

Shares bought or sold at a price by officers, directors and 10% owners (Form 4 codes P and S). Grants, option exercises and tax withholding aren't counted.

Date Insider Transaction Shares Price Value Owned after
2026-02-13 Schick Kelly Chief People Officer Grant or award +200,000 308,885
2026-02-13 Schick Kelly Chief People Officer Option exercise +5,000 308,885
2026-02-13 Schick Kelly Chief People Officer Shares withheld for taxes −1,735 $1.89 $3K 307,150
2026-02-13 Hirsch Andrew President & CEO Grant or award +700,000 1,123,145
2026-02-13 REYNO LEONARD Chief Medical Officer Grant or award +240,000 396,382
2026-02-13 Adams Kendra Chief Financial Officer Grant or award +240,000 402,342
2026-02-13 Adams Kendra Chief Financial Officer Option exercise +3,750 402,342
2026-02-13 Adams Kendra Chief Financial Officer Shares withheld for taxes −1,863 $1.89 $4K 400,479
2026-02-13 Mossler Mark Chief Accounting Officer Grant or award +56,980 75,184
2026-01-16 REYNO LEONARD Chief Medical Officer Sale −10,000 $2.22 $22K 156,382
2026-01-02 Anderson Kenneth Carl Director Grant or award +5,958 $1.93 $11K 146,532
2026-01-02 GROGAN DONNA ROY Director Grant or award +7,513 $1.93 $15K 66,142
2025-10-28 Mahaney Paige Chief Scientific Officer Option exercise +19,200 105,000
2025-10-28 Mahaney Paige Chief Scientific Officer Shares withheld for taxes −5,644 $2.58 $15K 99,356
2025-10-01 Anderson Kenneth Carl Director Grant or award +5,349 $2.15 $12K 140,574
2025-10-01 GROGAN DONNA ROY Director Grant or award +6,740 $2.15 $14K 58,629
2025-09-18 Adams Kendra Chief Financial Officer Option exercise +6,250 165,117
2025-09-18 Adams Kendra Chief Financial Officer Shares withheld for taxes −2,775 $3.32 $9K 162,342
2025-07-10 REYNO LEONARD Chief Medical Officer Option exercise +15,325 173,764
2025-07-10 REYNO LEONARD Chief Medical Officer Shares withheld for taxes −7,382 $1.99 $15K 166,382

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