United States Biotechnology & Medical Research

C4 Therapeutics Inc (CCCC)

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C4 Therapeutics Inc. experienced significant insider trading activity recently, with five proposed sales totaling approximately 2.09 million USD over the last ninety days. These divestments followed a positive earnings report. The stock price has appreciated by 31.7% during this period, reflecting heightened market interest in the healthcare firm.
Ticker: CCCC Exchange: NSM
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• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Buy signal Sell signal Earnings
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Insider trades have triggered activity signals for C4 Therapeutics Inc. Upgrade to see score, net flow, insiders and the full signal context.

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Top insiders
Trades
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
Mark Mossler Officer Officer
Transaction date
Proposed sale
Price
285.06
Quantity 2,343
Value US$1,760,796
2.6
JAY GELDMACHER Former REZI CEO
Transaction date
Proposed sale
Price
241.97
Quantity 66,727
Value US$4,936,680
Mark Mossler Officer Officer
Transaction date
Proposed sale
Price
190.15
Quantity 21,963
Value US$1,065,372
Mark Mossler Officer Officer
Transaction date
Proposed sale
Price
3.93
Quantity 1,000
Value US$100,000
Mark Mossler Former Section 16 Officer Officer
Transaction date
Proposed sale
Price
3.91
Quantity 9,087
Value US$35,485
JOLIE M SIEGEL Officer Officer
Transaction date
Proposed sale
Price
3.74
Quantity 101,175
Value US$378,849
1.4
REYNO LEONARD Chief Medical Officer Officer
Transaction date
Sale
Price
2.22
Quantity 10,000 -6.0%
Value US$22,200
Boyle Scott N Chief Business Officer Officer
Transaction date
Planned sale
Price
3.15
Quantity 669 -0.6%
Value US$2,107
Boyle Scott N Chief Business Officer Officer
Transaction date
Planned sale
Price
3.15
Quantity 490 -0.4%
Value US$1,544
Salter Malcolm Director Non-Executive Director
Transaction date
Proposed sale
Price
4.19
Quantity 13,000
Value US$54,532
Salter Malcolm Director Non-Executive Director
Transaction date
Proposed sale
Price
6.41
Quantity 13,000
Value US$83,321
Salter Malcolm Director Non-Executive Director
Transaction date
Proposed sale
Price
5.38
Quantity 8,561
Value US$46,061
0.5
Koppikar Utpal Non-Executive Director
Transaction date
Purchase
Price
5.60
Quantity 5,667 +inf%
Value US$31,735
2.3
Hirsch Andrew President & CEO Executive Director
Transaction date
Purchase
Price
8.40
Quantity 10,000 +inf%
Value US$84,000
1.7
Crystal Adam Chief Medical Officer Officer
Transaction date
Planned sale
Price
32.66
Quantity 1,054 -6.6%
Value US$34,420
1.7
Crystal Adam Chief Medical Officer Officer
Transaction date
Planned sale
Price
31.59
Quantity 13,946 -46.5%
Value US$440,547
Salter Malcolm Non-Executive Director
Transaction date
Planned sale
Price
30.25
Quantity 755 -6.4%
Value US$22,839
Salter Malcolm Non-Executive Director
Transaction date
Planned sale
Price
40.11
Quantity 755 -6.1%
Value US$30,283
Salter Malcolm Non-Executive Director
Transaction date
Planned sale
Price
44.94
Quantity 755 -5.7%
Value US$33,930
1.7
Crystal Adam Chief Medical Officer Officer
Transaction date
Planned sale
Price
45.99
Quantity 5,112 -100.0%
Value US$235,119
1.7
Crystal Adam Chief Medical Officer Officer
Transaction date
Planned sale
Price
45.32
Quantity 8,176 -61.5%
Value US$370,563
1.7
Crystal Adam Chief Medical Officer Officer
Transaction date
Planned sale
Price
44.25
Quantity 1,712 -11.4%
Value US$75,756
Prokupets Elena Non-Executive Director
Transaction date
Planned sale
Price
50.04
Quantity 1,311 -0.3%
Value US$65,604
Prokupets Elena Non-Executive Director
Transaction date
Planned sale
Price
50.04
Quantity 539 -1.7%
Value US$26,969
Prokupets Elena Non-Executive Director
Transaction date
Planned sale
Price
50.07
Quantity 3,330 -0.6%
Value US$166,743
Prokupets Elena Non-Executive Director
Transaction date
Planned sale
Price
50.07
Quantity 3,330 -3.8%
Value US$166,730
Prokupets Elena Non-Executive Director
Transaction date
Planned sale
Price
50.01
Quantity 1,320 -0.2%
Value US$66,010
Prokupets Elena Non-Executive Director
Transaction date
Planned sale
Price
50.00
Quantity 1,230 -1.4%
Value US$61,501
Siegel Jolie Chief Legal Officer Officer
Transaction date
Planned sale
Price
50.00
Quantity 12,500 -100.0%
Value US$625,000
Prokupets Elena Non-Executive Director
Transaction date
Planned sale
Price
45.01
Quantity 4,257 -4.0%
Value US$191,606
Prokupets Elena Non-Executive Director
Transaction date
Planned sale
Price
45.00
Quantity 11,336 -9.6%
Value US$510,168
1.7
Crystal Adam Chief Medical Officer Officer
Transaction date
Planned sale
Price
45.00
Quantity 15,000 -100.0%
Value US$675,000
Salter Malcolm Non-Executive Director
Transaction date
Planned sale
Price
37.37
Quantity 755 -5.0%
Value US$28,214
Salter Malcolm Non-Executive Director
Transaction date
Planned sale
Price
37.19
Quantity 755 -4.8%
Value US$28,078
Salter Malcolm Non-Executive Director
Transaction date
Planned sale
Price
37.12
Quantity 755 -4.6%
Value US$28,026
1.7
Crystal Adam Chief Medical Officer Officer
Transaction date
Planned sale
Price
38.00
Quantity 10,879 -100.0%
Value US$413,407
1.7
Crystal Adam Chief Medical Officer Officer
Transaction date
Planned sale
Price
37.16
Quantity 4,121 -27.5%
Value US$153,129
Salter Malcolm Non-Executive Director
Transaction date
Purchase
Price
19.00
Quantity 1,315 +9.0%
Value US$24,985
3.3
COHEN MARC A Non-Executive Director Large shareholder
Transaction date
Purchase
Price
19.00
Quantity 5,030 +inf%
Value US$95,570
MCKEE WILLIAM Chief Financial Officer Officer
Transaction date
Purchase
Price
19.00
Quantity 5,263 +inf%
Value US$99,997
Notification date Transaction date B/S Transaction type Insider and/or position Nb. shares
Price
Value 		Number of shares Price Value Details
2026-08-14 2026-08-14 PrS Proposed sale
Mark Mossler

Officer

Officer
2,343
285.06
US$1,760,796 		2,343 285.06 US$1,760,796
2026-08-14 2026-08-14 PrS Proposed sale
2.6
JAY GELDMACHER

Former REZI CEO
66,727
241.97
US$4,936,680 		66,727 241.97 US$4,936,680
2026-08-13 2026-08-13 PrS Proposed sale
Mark Mossler

Officer

Officer
21,963
190.15
US$1,065,372 		21,963 190.15 US$1,065,372
2026-08-12 2026-08-12 PrS Proposed sale
Mark Mossler

Officer

Officer
1,000
3.93
US$100,000 		1,000 3.93 US$100,000
2026-05-28 2026-05-27 PrS Proposed sale
Mark Mossler

Former Section 16 Officer

Officer
9,087
3.91
US$35,485 		9,087 3.91 US$35,485
2026-03-09 2026-03-09 PrS Proposed sale
JOLIE M SIEGEL

Officer

Officer
101,175
3.74
US$378,849 		101,175 3.74 US$378,849
2026-01-16 2026-01-16 S Sale
1.4
REYNO LEONARD

Chief Medical Officer

Officer
10,000 -6.0%
2.22
US$22,200 		10,000 -6.0% 2.22 US$22,200
2025-02-18 2025-02-18 PlS Planned sale
Boyle Scott N

Chief Business Officer

Officer
669 -0.6%
3.15
US$2,107 		669 -0.6% 3.15 US$2,107
2025-02-18 2025-02-14 PlS Planned sale
Boyle Scott N

Chief Business Officer

Officer
490 -0.4%
3.15
US$1,544 		490 -0.4% 3.15 US$1,544
2024-11-18 2024-11-18 PrS Proposed sale
Salter Malcolm

Director

Non-Executive Director
13,000
4.19
US$54,532 		13,000 4.19 US$54,532
2024-10-18 2024-10-18 PrS Proposed sale
Salter Malcolm

Director

Non-Executive Director
13,000
6.41
US$83,321 		13,000 6.41 US$83,321
2024-10-11 2024-10-11 PrS Proposed sale
Salter Malcolm

Director

Non-Executive Director
8,561
5.38
US$46,061 		8,561 5.38 US$46,061
2023-02-10 2023-02-08 B Purchase
0.5
Koppikar Utpal
Non-Executive Director
5,667 +inf%
5.60
US$31,735 		5,667 +inf% 5.60 US$31,735
2022-04-12 2022-04-12 B Purchase
2.3
Hirsch Andrew

President & CEO

Executive Director
10,000 +inf%
8.40
US$84,000 		10,000 +inf% 8.40 US$84,000
2022-01-05 2022-01-04 PlS Planned sale
1.7
Crystal Adam

Chief Medical Officer

Officer
1,054 -6.6%
32.66
US$34,420 		1,054 -6.6% 32.66 US$34,420
2022-01-05 2022-01-04 PlS Planned sale
1.7
Crystal Adam

Chief Medical Officer

Officer
13,946 -46.5%
31.59
US$440,547 		13,946 -46.5% 31.59 US$440,547
2021-12-17 2021-12-17 PlS Planned sale
Salter Malcolm
Non-Executive Director
755 -6.4%
30.25
US$22,839 		755 -6.4% 30.25 US$22,839
2021-11-19 2021-11-19 PlS Planned sale
Salter Malcolm
Non-Executive Director
755 -6.1%
40.11
US$30,283 		755 -6.1% 40.11 US$30,283
2021-10-15 2021-10-15 PlS Planned sale
Salter Malcolm
Non-Executive Director
755 -5.7%
44.94
US$33,930 		755 -5.7% 44.94 US$33,930
2021-10-05 2021-10-01 PlS Planned sale
1.7
Crystal Adam

Chief Medical Officer

Officer
5,112 -100.0%
45.99
US$235,119 		5,112 -100.0% 45.99 US$235,119
2021-10-05 2021-10-01 PlS Planned sale
1.7
Crystal Adam

Chief Medical Officer

Officer
8,176 -61.5%
45.32
US$370,563 		8,176 -61.5% 45.32 US$370,563
2021-10-05 2021-10-01 PlS Planned sale
1.7
Crystal Adam

Chief Medical Officer

Officer
1,712 -11.4%
44.25
US$75,756 		1,712 -11.4% 44.25 US$75,756
2021-09-29 2021-09-27 PlS Planned sale
Prokupets Elena
Non-Executive Director
1,311 -0.3%
50.04
US$65,604 		1,311 -0.3% 50.04 US$65,604
2021-09-29 2021-09-27 PlS Planned sale
Prokupets Elena
Non-Executive Director
539 -1.7%
50.04
US$26,969 		539 -1.7% 50.04 US$26,969
2021-09-14 2021-09-13 PlS Planned sale
Prokupets Elena
Non-Executive Director
3,330 -0.6%
50.07
US$166,743 		3,330 -0.6% 50.07 US$166,743
2021-09-14 2021-09-13 PlS Planned sale
Prokupets Elena
Non-Executive Director
3,330 -3.8%
50.07
US$166,730 		3,330 -3.8% 50.07 US$166,730
2021-09-14 2021-09-10 PlS Planned sale
Prokupets Elena
Non-Executive Director
1,320 -0.2%
50.01
US$66,010 		1,320 -0.2% 50.01 US$66,010
2021-09-14 2021-09-10 PlS Planned sale
Prokupets Elena
Non-Executive Director
1,230 -1.4%
50.00
US$61,501 		1,230 -1.4% 50.00 US$61,501
2021-09-14 2021-09-10 PlS Planned sale
Siegel Jolie

Chief Legal Officer

Officer
12,500 -100.0%
50.00
US$625,000 		12,500 -100.0% 50.00 US$625,000
2021-08-02 2021-08-02 PlS Planned sale
Prokupets Elena
Non-Executive Director
4,257 -4.0%
45.01
US$191,606 		4,257 -4.0% 45.01 US$191,606
2021-08-02 2021-07-29 PlS Planned sale
Prokupets Elena
Non-Executive Director
11,336 -9.6%
45.00
US$510,168 		11,336 -9.6% 45.00 US$510,168
2021-08-02 2021-07-29 PlS Planned sale
1.7
Crystal Adam

Chief Medical Officer

Officer
15,000 -100.0%
45.00
US$675,000 		15,000 -100.0% 45.00 US$675,000
2021-07-19 2021-07-16 PlS Planned sale
Salter Malcolm
Non-Executive Director
755 -5.0%
37.37
US$28,214 		755 -5.0% 37.37 US$28,214
2021-06-21 2021-06-18 PlS Planned sale
Salter Malcolm
Non-Executive Director
755 -4.8%
37.19
US$28,078 		755 -4.8% 37.19 US$28,078
2021-05-24 2021-05-21 PlS Planned sale
Salter Malcolm
Non-Executive Director
755 -4.6%
37.12
US$28,026 		755 -4.6% 37.12 US$28,026
2021-04-06 2021-04-05 PlS Planned sale
1.7
Crystal Adam

Chief Medical Officer

Officer
10,879 -100.0%
38.00
US$413,407 		10,879 -100.0% 38.00 US$413,407
2021-04-06 2021-04-05 PlS Planned sale
1.7
Crystal Adam

Chief Medical Officer

Officer
4,121 -27.5%
37.16
US$153,129 		4,121 -27.5% 37.16 US$153,129
2020-10-06 2020-10-06 B Purchase
Salter Malcolm
Non-Executive Director
1,315 +9.0%
19.00
US$24,985 		1,315 +9.0% 19.00 US$24,985
2020-10-06 2020-10-06 B Purchase
3.3
COHEN MARC A
Non-Executive Director Large shareholder
5,030 +inf%
19.00
US$95,570 		5,030 +inf% 19.00 US$95,570
2020-10-06 2020-10-06 B Purchase
MCKEE WILLIAM

Chief Financial Officer

Officer
5,263 +inf%
19.00
US$99,997 		5,263 +inf% 19.00 US$99,997
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