How many insider declarations has Mark Mossler filed?

Mark Mossler has filed 3 public insider declarations with SEC (Form 4).

What is Mark Mossler's role?

Mark Mossler's reported role is not specified by the regulator across the filings.

Which companies does Mark Mossler report trades for?

Mark Mossler reports trades for C4 Therapeutics, Inc..

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MM

Mark Mossler

OFFICERM

·SEC (Form 4)

C4 Therapeutics, Inc.

Cumul. flow

0

Total declarations

0

Company

—

▲ Purchases (0 ops.)

—

▼ Sales (0 ops.)

Insider track record

Other

Disclosed buys

0

Disclosed sells

0

Not enough buy signals with a settled T+90 horizon to measure a track record yet.

Signal history

Browse the full record of transactions filed by Mark Mossler. Insider active across 1 company, notably C4 Therapeutics, Inc.. Cumulatively, 3 disclosures have been recorded. History available since 12 August 2026. The latest transaction was disclosed on 14 August 2026 (Notice of proposed sale (Form 144)). Regulator: SEC (Form 4). The full history is openly available.

Companies and markets linked to Mark Mossler

Open company profiles for insider transactions, fundamentals and analyst consensus when available.

C4 Therapeutics, Inc. (US)

Declarations3 total

●

Mark Mossler

OfficerExecutives14 Aug 2026C4 Therapeutics, Inc.

$17,6050Source ↗

4,139 shares@ US$4.2534CommonSEC144:0001950047-26-008193

●

Mark Mossler

OfficerExecutives13 Aug 2026C4 Therapeutics, Inc.

$61,07324Source ↗

15,000 shares@ US$4.07150.012% mcap44.4% of flowCommonSEC144:0001950047-26-008065

●

Mark Mossler

OfficerExecutives12 Aug 2026C4 Therapeutics, Inc.

$76,68029Source ↗

19,519 shares@ US$3.92850.019% mcap100.0% of flowCommonSEC144:0001950047-26-008039

3 of 3 declarations

InsidersTradesSigma

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MM

Mark Mossler

OFFICERM

·SEC (Form 4)

C4 Therapeutics, Inc.

Cumul. flow

0

Total declarations

0

Company

—

▲ Purchases (0 ops.)

—

▼ Sales (0 ops.)

Insider track record

Other

Disclosed buys

0

Disclosed sells

0

Not enough buy signals with a settled T+90 horizon to measure a track record yet.

Signal history

Browse the full record of transactions filed by Mark Mossler. Insider active across 1 company, notably C4 Therapeutics, Inc.. Cumulatively, 3 disclosures have been recorded. History available since 12 August 2026. The latest transaction was disclosed on 14 August 2026 (Notice of proposed sale (Form 144)). Regulator: SEC (Form 4). The full history is openly available.