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C4 Therapeutics, Inc.

Insider trading activity for C4 Therapeutics, Inc., straight from SEC Form 4 filings. Net figures below count open-market buys and sales only — grants, option exercises and tax withholding are excluded because they are compensation, not decisions to trade.

Past 3 months

net buying

Bought(0 · 0 insiders): $0
Sold(0 · 0 insiders): $0

Past 6 months

net buying

Bought(0 · 0 insiders): $0
Sold(0 · 0 insiders): $0

Past 12 months

-$22.2K

net selling

Bought(0 · 0 insiders): $0
Sold(1 · 1 insiders): $22.2K

Transaction history

The 68 most recent Form 4 transactions.

Open in screener →

Insider transactions, newest first: date, security, transaction type, size and a link to the filing each row came from.
Date	Insider	Role	Type	Shares	Price	Value	Δ Own	Filing
Sep 18	Adams Kendra	Chief Financial Officer	FTAX	2,775	$3.39	$9.4K	-0.7%	Open the original filing on SEC.gov
Sep 18	Adams Kendra	Chief Financial Officer	MEXER	6,250	—	—	+1.7%	Open the original filing on SEC.gov
Jul 10	Reyno Leonard	Chief Medical Officer	FTAX	7,397	$4.06	$30K	-1.9%	Open the original filing on SEC.gov
Jul 10	Reyno Leonard	Chief Medical Officer	MEXER	15,325	—	—	+4.2%	Open the original filing on SEC.gov
Jul 1	Grogan Donna Roy	Director	AGRANT	3,341	$4.34	$14.5K	+4.7%	Open the original filing on SEC.gov
Jul 1	Anderson Kenneth Carl	Director	AGRANT	2,650	$4.34	$11.5K	+3.8%	Open the original filing on SEC.gov
Jun 24	Hughes Owen	Director	AGRANT◆	62,000	—	—	—	Open the original filing on SEC.gov
Jun 24	Hoerter Steven L.	Director	AGRANT◆	62,000	—	—	—	Open the original filing on SEC.gov
Jun 24	Koppikar Utpal	Director	AGRANT◆	62,000	—	—	—	Open the original filing on SEC.gov
Jun 24	Cooper Ronald Harold…	Director	AGRANT◆	62,000	—	—	—	Open the original filing on SEC.gov
Jun 24	Fawell Stephen	Director	AGRANT◆	62,000	—	—	—	Open the original filing on SEC.gov
Jun 24	Grogan Donna Roy	Director	AGRANT◆	62,000	—	—	—	Open the original filing on SEC.gov
Jun 24	Bessen Laura	Director	AGRANT◆	62,000	—	—	—	Open the original filing on SEC.gov
Jun 24	Anderson Kenneth Carl	Director	AGRANT◆	62,000	—	—	—	Open the original filing on SEC.gov
Jun 1	Anderson Kenneth Carl	Director	MEXER◆	1,070	—	—	—	Open the original filing on SEC.gov
Jun 1	Anderson Kenneth Carl	Director	MEXER	1,070	$2.11	$2.3K	+1.6%	Open the original filing on SEC.gov
Apr 1	Grogan Donna Roy	Director	AGRANT	5,370	$2.70	$14.5K	+8.1%	Open the original filing on SEC.gov
Apr 1	Anderson Kenneth Carl	Director	AGRANT	4,259	$2.70	$11.5K	+6.7%	Open the original filing on SEC.gov
Feb 15	Hirsch Andrew	President & CEO	FTAX	9,057	$1.89	$17.1K	-0.8%	Open the original filing on SEC.gov
Feb 15	Hirsch Andrew	President & CEO	MEXER	20,400	—	—	+1.9%	Open the original filing on SEC.gov
Feb 14	Mahaney Paige	Chief Scientific Officer	FTAX	2,446	$1.89	$4.6K	-0.7%	Open the original filing on SEC.gov
Feb 14	Mahaney Paige	Chief Scientific Officer	MEXER	7,050	—	—	+2.1%	Open the original filing on SEC.gov
Feb 14	Schick Kelly	Chief People Officer	FTAX	7,269	$1.89	$13.7K	-2.4%	Open the original filing on SEC.gov
Feb 14	Schick Kelly	Chief People Officer	MEXER	20,950	—	—	+7.3%	Open the original filing on SEC.gov
Feb 14	Hirsch Andrew	President & CEO	FTAX	39,154	$1.89	$74K	-3.5%	Open the original filing on SEC.gov
Feb 14	Hirsch Andrew	President & CEO	MEXER	81,725	—	—	+7.8%	Open the original filing on SEC.gov
Feb 14	Reyno Leonard	Chief Medical Officer	FTAX	16,579	$1.89	$31.3K	-4.2%	Open the original filing on SEC.gov
Feb 14	Reyno Leonard	Chief Medical Officer	MEXER	30,950	—	—	+8.5%	Open the original filing on SEC.gov
Feb 14	Mossler Mark	Chief Accounting Officer	FTAX	3,268	$1.89	$6.2K	-4.3%	Open the original filing on SEC.gov
Feb 14	Mossler Mark	Chief Accounting Officer	MEXER	9,420	—	—	+14.3%	Open the original filing on SEC.gov
Feb 14	Boyle Scott N	Chief Business Officer	FTAX	7,269	$1.89	$13.7K	-2.4%	Open the original filing on SEC.gov
Feb 14	Boyle Scott N	Chief Business Officer	MEXER	20,950	—	—	+7.3%	Open the original filing on SEC.gov
Feb 14	Adams Kendra	Chief Financial Officer	FTAX	15,381	$1.89	$29.1K	-3.8%	Open the original filing on SEC.gov
Feb 14	Adams Kendra	Chief Financial Officer	MEXER	30,950	—	—	+8.4%	Open the original filing on SEC.gov
Feb 13	Mahaney Paige	Chief Scientific Officer	AGRANT	240,000	—	—	+241.6%	Open the original filing on SEC.gov
Feb 13	Schick Kelly	Chief People Officer	FTAX	1,735	$1.89	$3.3K	-0.6%	Open the original filing on SEC.gov
Feb 13	Schick Kelly	Chief People Officer	MEXER	5,000	—	—	+1.7%	Open the original filing on SEC.gov
Feb 13	Schick Kelly	Chief People Officer	AGRANT	200,000	—	—	+183.7%	Open the original filing on SEC.gov
Feb 13	Hirsch Andrew	President & CEO	AGRANT	700,000	—	—	+165.4%	Open the original filing on SEC.gov
Feb 13	Reyno Leonard	Chief Medical Officer	AGRANT	240,000	—	—	+153.5%	Open the original filing on SEC.gov
Feb 13	Mossler Mark	Chief Accounting Officer	AGRANT	56,980	—	—	+313.0%	Open the original filing on SEC.gov
Feb 13	Boyle Scott N	Chief Business Officer	FTAX	1,735	$1.89	$3.3K	-0.6%	Open the original filing on SEC.gov
Feb 13	Boyle Scott N	Chief Business Officer	MEXER	5,000	—	—	+1.7%	Open the original filing on SEC.gov
Feb 13	Boyle Scott N	Chief Business Officer	AGRANT	200,000	—	—	+185.5%	Open the original filing on SEC.gov
Feb 13	Adams Kendra	Chief Financial Officer	FTAX	1,863	$1.89	$3.5K	-0.5%	Open the original filing on SEC.gov
Feb 13	Adams Kendra	Chief Financial Officer	MEXER	3,750	—	—	+0.9%	Open the original filing on SEC.gov
Feb 13	Adams Kendra	Chief Financial Officer	AGRANT	240,000	—	—	+147.8%	Open the original filing on SEC.gov
Jan 16	Reyno Leonard	Chief Medical Officer	SSELL	10,000	$2.22	$22.2K	-6.0%	Open the original filing on SEC.gov
Jan 2	Grogan Donna Roy	Director	AGRANT	7,513	$1.93	$14.5K	+12.8%	Open the original filing on SEC.gov
Jan 2	Anderson Kenneth Carl	Director	AGRANT	5,958	$1.93	$11.5K	+4.2%	Open the original filing on SEC.gov
Oct 28, 2025	Mahaney Paige	Chief Scientific Officer	FTAX	5,644	$2.58	$14.6K	-5.4%	Open the original filing on SEC.gov
Oct 28, 2025	Mahaney Paige	Chief Scientific Officer	MEXER	19,200	—	—	+22.4%	Open the original filing on SEC.gov
Oct 1, 2025	Grogan Donna Roy	Director	AGRANT	6,740	$2.15	$14.5K	+13.0%	Open the original filing on SEC.gov
Oct 1, 2025	Anderson Kenneth Carl	Director	AGRANT	5,349	$2.15	$11.5K	+4.0%	Open the original filing on SEC.gov
Sep 18, 2025	Adams Kendra	Chief Financial Officer	FTAX	2,775	$3.32	$9.2K	-1.7%	Open the original filing on SEC.gov
Sep 18, 2025	Adams Kendra	Chief Financial Officer	MEXER	6,250	—	—	+3.9%	Open the original filing on SEC.gov
Jul 10, 2025	Reyno Leonard	Chief Medical Officer	FTAX↺	7,382	$1.99	$14.7K	-4.3%	Open the original filing on SEC.gov
Jul 10, 2025	Reyno Leonard	Chief Medical Officer	MEXER↺	15,325	—	—	+9.7%	Open the original filing on SEC.gov
Jul 1, 2025	Grogan Donna Roy	Director	AGRANT	9,609	$1.51	$14.5K	+22.7%	Open the original filing on SEC.gov
Jul 1, 2025	Anderson Kenneth Carl	Director	AGRANT	7,616	$1.51	$11.5K	+6.0%	Open the original filing on SEC.gov
Jun 18, 2025	Koppikar Utpal	Director	AGRANT◆	35,500	—	—	—	Open the original filing on SEC.gov
Jun 18, 2025	Hughes Owen	Director	AGRANT◆	35,500	—	—	—	Open the original filing on SEC.gov
Jun 18, 2025	Fawell Stephen	Director	AGRANT◆	35,500	—	—	—	Open the original filing on SEC.gov
Jun 18, 2025	Grogan Donna Roy	Director	AGRANT◆	35,500	—	—	—	Open the original filing on SEC.gov
Jun 18, 2025	Cooper Ronald Harold…	Director	AGRANT◆	35,500	—	—	—	Open the original filing on SEC.gov
Jun 18, 2025	Hoerter Steven L.	Director	AGRANT◆	35,500	—	—	—	Open the original filing on SEC.gov
Jun 18, 2025	Bessen Laura	Director	AGRANT◆	35,500	—	—	—	Open the original filing on SEC.gov
Jun 18, 2025	Anderson Kenneth Carl	Director	AGRANT◆	35,500	—	—	—	Open the original filing on SEC.gov

FTAX$9.4K

Adams Kendra · Chief Financial…Sep 18

2,775 sh @ $3.39 · -0.7% own

MEXER—

Adams Kendra · Chief Financial…Sep 18

6,250 sh · +1.7% own

FTAX$30K

Reyno Leonard · Chief Medical…Jul 10

7,397 sh @ $4.06 · -1.9% own

MEXER—

Reyno Leonard · Chief Medical…Jul 10

15,325 sh · +4.2% own

AGRANT$14.5K

Grogan Donna Roy · DirectorJul 1

3,341 sh @ $4.34 · +4.7% own

AGRANT$11.5K

Anderson Kenneth Carl · DirectorJul 1

2,650 sh @ $4.34 · +3.8% own

AGRANT◆—

Hughes Owen · DirectorJun 24

62,000 sh

AGRANT◆—

Hoerter Steven L. · DirectorJun 24

62,000 sh

AGRANT◆—

Koppikar Utpal · DirectorJun 24

62,000 sh

AGRANT◆—

Cooper Ronald Harold… · DirectorJun 24

62,000 sh

AGRANT◆—

Fawell Stephen · DirectorJun 24

62,000 sh

AGRANT◆—

Grogan Donna Roy · DirectorJun 24

62,000 sh

AGRANT◆—

Bessen Laura · DirectorJun 24

62,000 sh

AGRANT◆—

Anderson Kenneth Carl · DirectorJun 24

62,000 sh

MEXER◆—

Anderson Kenneth Carl · DirectorJun 1

1,070 sh

MEXER$2.3K

Anderson Kenneth Carl · DirectorJun 1

1,070 sh @ $2.11 · +1.6% own

AGRANT$14.5K

Grogan Donna Roy · DirectorApr 1

5,370 sh @ $2.70 · +8.1% own

AGRANT$11.5K

Anderson Kenneth Carl · DirectorApr 1

4,259 sh @ $2.70 · +6.7% own

FTAX$17.1K

Hirsch Andrew · President & CEOFeb 15

9,057 sh @ $1.89 · -0.8% own

MEXER—

Hirsch Andrew · President & CEOFeb 15

20,400 sh · +1.9% own

FTAX$4.6K

Mahaney Paige · Chief Scientific…Feb 14

2,446 sh @ $1.89 · -0.7% own

MEXER—

Mahaney Paige · Chief Scientific…Feb 14

7,050 sh · +2.1% own

FTAX$13.7K

Schick Kelly · Chief People…Feb 14

7,269 sh @ $1.89 · -2.4% own

MEXER—

Schick Kelly · Chief People…Feb 14

20,950 sh · +7.3% own

FTAX$74K

Hirsch Andrew · President & CEOFeb 14

39,154 sh @ $1.89 · -3.5% own

MEXER—

Hirsch Andrew · President & CEOFeb 14

81,725 sh · +7.8% own

FTAX$31.3K

Reyno Leonard · Chief Medical…Feb 14

16,579 sh @ $1.89 · -4.2% own

MEXER—

Reyno Leonard · Chief Medical…Feb 14

30,950 sh · +8.5% own

FTAX$6.2K

Mossler Mark · Chief Accounting…Feb 14

3,268 sh @ $1.89 · -4.3% own

MEXER—

Mossler Mark · Chief Accounting…Feb 14

9,420 sh · +14.3% own

FTAX$13.7K

Boyle Scott N · Chief Business…Feb 14

7,269 sh @ $1.89 · -2.4% own

MEXER—

Boyle Scott N · Chief Business…Feb 14

20,950 sh · +7.3% own

FTAX$29.1K

Adams Kendra · Chief Financial…Feb 14

15,381 sh @ $1.89 · -3.8% own

MEXER—

Adams Kendra · Chief Financial…Feb 14

30,950 sh · +8.4% own

AGRANT—

Mahaney Paige · Chief Scientific…Feb 13

240,000 sh · +241.6% own

FTAX$3.3K

Schick Kelly · Chief People…Feb 13

1,735 sh @ $1.89 · -0.6% own

MEXER—

Schick Kelly · Chief People…Feb 13

5,000 sh · +1.7% own

AGRANT—

Schick Kelly · Chief People…Feb 13

200,000 sh · +183.7% own

AGRANT—

Hirsch Andrew · President & CEOFeb 13

700,000 sh · +165.4% own

AGRANT—

Reyno Leonard · Chief Medical…Feb 13

240,000 sh · +153.5% own

AGRANT—

Mossler Mark · Chief Accounting…Feb 13

56,980 sh · +313.0% own

FTAX$3.3K

Boyle Scott N · Chief Business…Feb 13

1,735 sh @ $1.89 · -0.6% own

MEXER—

Boyle Scott N · Chief Business…Feb 13

5,000 sh · +1.7% own

AGRANT—

Boyle Scott N · Chief Business…Feb 13

200,000 sh · +185.5% own

FTAX$3.5K

Adams Kendra · Chief Financial…Feb 13

1,863 sh @ $1.89 · -0.5% own

MEXER—

Adams Kendra · Chief Financial…Feb 13

3,750 sh · +0.9% own

AGRANT—

Adams Kendra · Chief Financial…Feb 13

240,000 sh · +147.8% own

SSELL$22.2K

Reyno Leonard · Chief Medical…Jan 16

10,000 sh @ $2.22 · -6.0% own

AGRANT$14.5K

Grogan Donna Roy · DirectorJan 2

7,513 sh @ $1.93 · +12.8% own

AGRANT$11.5K

Anderson Kenneth Carl · DirectorJan 2

5,958 sh @ $1.93 · +4.2% own

FTAX$14.6K

Mahaney Paige · Chief Scientific…Oct 28, 2025

5,644 sh @ $2.58 · -5.4% own

MEXER—

Mahaney Paige · Chief Scientific…Oct 28, 2025

19,200 sh · +22.4% own

AGRANT$14.5K

Grogan Donna Roy · DirectorOct 1, 2025

6,740 sh @ $2.15 · +13.0% own

AGRANT$11.5K

Anderson Kenneth Carl · DirectorOct 1, 2025

5,349 sh @ $2.15 · +4.0% own

FTAX$9.2K

Adams Kendra · Chief Financial…Sep 18, 2025

2,775 sh @ $3.32 · -1.7% own

MEXER—

Adams Kendra · Chief Financial…Sep 18, 2025

6,250 sh · +3.9% own

FTAX↺$14.7K

Reyno Leonard · Chief Medical…Jul 10, 2025

7,382 sh @ $1.99 · -4.3% own

MEXER↺—

Reyno Leonard · Chief Medical…Jul 10, 2025

15,325 sh · +9.7% own

AGRANT$14.5K

Grogan Donna Roy · DirectorJul 1, 2025

9,609 sh @ $1.51 · +22.7% own

AGRANT$11.5K

Anderson Kenneth Carl · DirectorJul 1, 2025

7,616 sh @ $1.51 · +6.0% own

AGRANT◆—

Koppikar Utpal · DirectorJun 18, 2025

35,500 sh

AGRANT◆—

Hughes Owen · DirectorJun 18, 2025

35,500 sh

AGRANT◆—

Fawell Stephen · DirectorJun 18, 2025

35,500 sh

AGRANT◆—

Grogan Donna Roy · DirectorJun 18, 2025

35,500 sh

AGRANT◆—

Cooper Ronald Harold… · DirectorJun 18, 2025

35,500 sh

AGRANT◆—

Hoerter Steven L. · DirectorJun 18, 2025

35,500 sh

AGRANT◆—

Bessen Laura · DirectorJun 18, 2025

35,500 sh

AGRANT◆—

Anderson Kenneth Carl · DirectorJun 18, 2025

35,500 sh

Filing record

How quickly insiders here report their trades. Section 16 allows two business days from the transaction.

All 38 filings we hold were filed within the two-business-day deadline.

Counted in business days from the transaction date, or the deemed execution date where the filing reports one, excluding weekends and federal holidays. How this is measured · All late filings

Insiders at this company

Everyone who has filed a Form 4 for this issuer.

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