C4 Therapeutics, Inc. (CCCC) Insider Ownership

Historic Insider Ownership Trends

CCCC's three largest insider shareholders as of March 23, 2026 are Marc A Cohen (Director, 1.87Mn shares), Alain J Cohen (Director, 1.74Mn shares), Andrew Hirsch (President Ceo, 1.07Mn shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares (Direct) Shares (Indirect) Report Date
Marc A Cohen 0 1,874,805 14 Jun, 2021
Alain J Cohen 0 1,741,930 14 Jun, 2021
Andrew Hirsch President Ceo 1,074,934 0 18 Feb, 2026
Elena Prokupets 0 503,126 29 Sep, 2021
Kendra Adams Chief Financial Officer 385,098 0 18 Feb, 2026
Leonard Reyno Chief Medical Officer 379,803 0 18 Feb, 2026
Paige Mahaney Chief Scientific Officer 336,910 0 18 Feb, 2026
Kelly Schick Chief People Officer 299,881 0 18 Feb, 2026
Scott N Boyle Chief Business Officer 298,801 0 18 Feb, 2026
Kenneth Carl Anderson 146,532 0 05 Jan, 2026
Stewart Fisher Chief Scientific Officer 130,710 0 17 Sep, 2024
Jolie Siegel Chief Legal Officer 107,939 0 18 Feb, 2025
Mark Mossler Chief Accounting Officer 71,916 0 18 Feb, 2026
Donna Roy Grogan 66,142 0 05 Jan, 2026
Kenneth Carl Anderson 0 47,316 14 Apr, 2021
Lauren White Chief Financial Officer 32,686 0 31 Aug, 2023
Glenn Dubin 22,075 0 02 Apr, 2024
Adam Crystal Chief Medical Officer 20,097 0 01 Feb, 2023
Malcolm Salter 11,380 0 18 Jan, 2022
Utpal Koppikar 5,667 0 10 Feb, 2023
Marc A Cohen 1,118 0 18 Jan, 2022
Alain J Cohen 928 0 05 Apr, 2022

* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
13 Feb, 2026 Mark Mossler Common Stock A 56,980 $0.00 75,184 D A
13 Feb, 2026 Andrew Hirsch Common Stock A 700,000 $0.00 1,123,145 D A
13 Feb, 2026 Scott N Boyle Common Stock A 200,000 $0.00 307,805 D A
13 Feb, 2026 Paige Mahaney Common Stock A 240,000 $0.00 339,356 D A
13 Feb, 2026 Kendra Adams Common Stock A 240,000 $0.00 402,342 D A
13 Feb, 2026 Leonard Reyno Common Stock A 240,000 $0.00 396,382 D A
13 Feb, 2026 Kelly Schick Common Stock A 200,000 $0.00 308,885 D A
14 Feb, 2026 Paige Mahaney Common Stock A 7,050 $0.00 339,356 D M
13 Feb, 2026 Kendra Adams Common Stock A 3,750 $0.00 402,342 D M
14 Feb, 2026 Leonard Reyno Common Stock A 30,950 $0.00 396,382 D M
13 Feb, 2026 Kelly Schick Common Stock A 5,000 $0.00 308,885 D M
14 Feb, 2026 Andrew Hirsch Common Stock A 81,725 $0.00 1,123,145 D M
13 Feb, 2026 Scott N Boyle Common Stock A 5,000 $0.00 307,805 D M
14 Feb, 2026 Mark Mossler Common Stock A 9,420 $0.00 75,184 D M
14 Feb, 2026 Paige Mahaney Common Stock D 2,446 $1.89 336,910 D F
13 Feb, 2026 Kendra Adams Common Stock D 1,863 $1.89 400,479 D F
13 Feb, 2026 Kelly Schick Common Stock D 1,735 $1.89 307,150 D F
14 Feb, 2026 Leonard Reyno Common Stock D 16,579 $1.89 379,803 D F
13 Feb, 2026 Scott N Boyle Common Stock D 1,735 $1.89 306,070 D F
14 Feb, 2026 Mark Mossler Common Stock D 3,268 $1.89 71,916 D F