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C4 Therapeutics, Inc.

CCCC Net selling
CIK 0001662579 #3117 in the set updated 21 Sep 2026
Bought (120 mo)
$336.29K
out of their own pocket, the only kind of buying there is
Sold (120 mo)
$16.86M
$3.65K on a plan · $4.16M straight out of an exercise
Sold at will
$12.70M
40 of 54 sales
Net
−$16.52M
−$12.36M against sales at will

By person

21 insiders · 85 transactions
3.4×

Andrew J. Hirsch holds only 3.4 times base salary in stock. $2.39M of shares against $694.93K in salary for 2025.

Salary from the company's own proxy. The shares are what Andrew J. Hirsch last reported holding, valued at $2.22, the price Common Stock was last bought or sold at on the open market here, on 16 Jan 2026.

Insider
Role
Bought
Sold
Net
Holding
Of company
Worth
Change
Prokupets Elena
Director
—
$8.60M (28)
−$8.60M
1,184,573
0.9629%
$2.63M
+82.3%
Fisher Stewart
Chief Scientific Officer
—
$3.84M (3)
−$3.84M
130,710
0.1062%
$290.18K
+55.1%
Crystal Adam
Chief Medical Officer
—
$2.97M (10) scheduled
−$2.97M
20,097
0.0163%
$44.62K
—
Siegel Jolie
Chief Legal Officer
—
$1.19M (2) scheduled
−$1.19M
107,939
0.0877%
$239.62K
—
Salter Malcolm
Director
$24.99K (1)
$239.79K (8)
−$214.80K
11,380
0.0093%
$25.26K
—
MCKEE WILLIAM
Chief Financial Officer
$100.00K (1)
—
+$100.00K
5,263
0.0043%
$11.68K
—
COHEN MARC A
Director
$95.57K (1)
—
+$95.57K
6,327,970
5.14%
$14.05M
+216.2%
Hirsch Andrew
President & CEO
$84.00K (1)
—
+$84.00K
1,074,934
0.8738%
$2.39M
—
Koppikar Utpal
Director
$31.74K (1)
—
+$31.74K
5,667
0.0046%
$12.58K
—
REYNO LEONARD
Chief Medical Officer
—
$22.20K (1)
−$22.20K
372,406
0.3027%
$826.74K
—
Boyle Scott N
Chief Business Officer
—
$3.65K (2) scheduled
−$3.65K
298,801
0.2429%
$663.34K
—
COHEN ALAIN J
Director
—
—
—
4,289,160
3.49%
$9.52M
—
Dubin Glenn
Director
—
—
—
812,682
0.6606%
$1.80M
+2.8%
DOWNEY BRUCE
Director
—
—
—
489,542
0.3979%
$1.09M
—
Adams Kendra
Chief Financial Officer
—
—
—
385,098
0.3130%
$854.92K
—
Mahaney Paige
Chief Scientific Officer
—
—
—
336,910
0.2739%
$747.94K
—
Schick Kelly
Chief People Officer
—
—
—
299,881
0.2438%
$665.74K
—
Anderson Kenneth Carl
Director
—
—
—
275,674
0.2241%
$612.00K
+488.9%
GROGAN DONNA ROY
Director
—
—
—
74,853
0.0608%
$166.17K
—
Mossler Mark
Chief Accounting Officer
—
—
—
71,916
0.0585%
$159.65K
—
White Lauren
Chief Financial Officer
—
—
—
32,686
0.0266%
$72.56K
—

Individual transactions

40
Insider
Date
Role
Action
Shares
Price
Amount
REYNO LEONARD
16 Jan 2026
Chief Medical Officer
Sell
10,000
$2.22
$22.20K
Salter Malcolm
17 Dec 2021
Director
Sell
755
$30.25
$22.84K
Salter Malcolm
19 Nov 2021
Director
Sell
755
$40.11
$30.28K
Salter Malcolm
15 Oct 2021
Director
Sell
755
$44.94
$33.93K
Prokupets Elena
27 Sep 2021
Director
Sell indirect
1,311
$50.04
$65.60K
Prokupets Elena
27 Sep 2021
Director
Sell indirect
539
$50.04
$26.97K
Prokupets Elena
24 Sep 2021
Director
Sell indirect
2,115
$50.10
$105.96K
Prokupets Elena
24 Sep 2021
Director
Sell indirect
900
$50.11
$45.10K
Prokupets Elena
23 Sep 2021
Director
Sell indirect
1,007
$51.08
$51.43K
Prokupets Elena
23 Sep 2021
Director
Sell indirect
11,801
$50.35
$594.19K
Prokupets Elena
23 Sep 2021
Director
Sell indirect
446
$51.09
$22.78K
Prokupets Elena
23 Sep 2021
Director
Sell indirect
5,926
$50.35
$298.36K
Prokupets Elena
22 Sep 2021
Director
Sell indirect
7,004
$50.09
$350.86K
Prokupets Elena
22 Sep 2021
Director
Sell indirect
3,544
$50.10
$177.55K
Prokupets Elena
21 Sep 2021
Director
Sell indirect
5,333
$50.14
$267.41K
Prokupets Elena
21 Sep 2021
Director
Sell indirect
4,988
$50.13
$250.05K
Salter Malcolm
17 Sep 2021
Director
Sell
755
$49.89
$37.67K
Prokupets Elena
17 Sep 2021
Director
Sell indirect
5,688
$50.05
$284.69K
Prokupets Elena
17 Sep 2021
Director
Sell indirect
5,152
$50.04
$257.81K
Prokupets Elena
16 Sep 2021
Director
Sell indirect
346
$50.01
$17.31K
Prokupets Elena
16 Sep 2021
Director
Sell indirect
25,807
$48.62
$1.25M
Prokupets Elena
16 Sep 2021
Director
Sell indirect
346
$50.01
$17.30K
Prokupets Elena
15 Sep 2021
Director
Sell indirect
24,193
$48.97
$1.18M
Prokupets Elena
15 Sep 2021
Director
Sell indirect
30,000
$48.71
$1.46M
Prokupets Elena
14 Sep 2021
Director
Sell indirect
492
$50.03
$24.61K
Prokupets Elena
14 Sep 2021
Director
Sell indirect
492
$50.01
$24.60K
Prokupets Elena
13 Sep 2021
Director
Sell indirect
3,330
$50.07
$166.74K
Prokupets Elena
13 Sep 2021
Director
Sell indirect
3,330
$50.07
$166.73K
Prokupets Elena
10 Sep 2021
Director
Sell indirect
1,320
$50.01
$66.01K
Prokupets Elena
10 Sep 2021
Director
Sell indirect
1,230
$50.00
$61.50K
Salter Malcolm
20 Aug 2021
Director
Sell
755
$40.73
$30.75K
Fisher Stewart
3 Aug 2021
Chief Scientific Officer
Sell
17,057
$45.01
$767.81K
Prokupets Elena
3 Aug 2021
Director
Sell indirect
14,407
$45.16
$650.59K
Fisher Stewart
2 Aug 2021
Chief Scientific Officer
Sell
18,104
$45.00
$814.76K
Prokupets Elena
2 Aug 2021
Director
Sell indirect
4,257
$45.01
$191.61K
Fisher Stewart
29 Jul 2021
Chief Scientific Officer
Sell
50,211
$45.00
$2.26M
Prokupets Elena
29 Jul 2021
Director
Sell indirect
11,336
$45.00
$510.17K
Salter Malcolm
16 Jul 2021
Director
Sell
755
$37.37
$28.21K
Salter Malcolm
18 Jun 2021
Director
Sell
755
$37.19
$28.08K
Salter Malcolm
21 May 2021
Director
Sell
755
$37.12
$28.03K
Show all 85 transactions →

What was left out

Form 4 filings counted 257
Amendments (4/A) skipped 8
Filings about a different issuer 0
Unreadable filings 0
Joint filings 0
Sales on a Rule 10b5-1 plan 2
Sales straight out of an exercise 12
Sales at will 40
Transactions with no price 0
Shares from compensation/vesting 14,121,215
Sales filed before the plan box existed 39
History held since 5 Oct 2020