Quick Takeaways
- Mark Mossler has 1 issuer position tracked on this page.
- Estimated disclosed ownership value: $135,921.
- Recent insider filing activity is available below.
- Info
- Insider Ownership
Insider Trading & Ownership of Mark Mossler
- Location
- Watertown, MA
- Summary
- The estimated net worth of Mark Mossler is at least $135,921 dollars as of 18 Feb 2026. Mark Mossler is the Chief Accounting Officer of C4 Therapeutics, Inc. and owns shares of C4 Therapeutics, Inc. (CCCC) stock worth about $135.9K.
- Signature
- /s/ Shagha Russell, Attorney-in-Fact
- All Insider Reports
- All Insider Reports
Follow Filing Activity
Follow Mark Mossler and return when a new Insider Trading filing changes the record on this page.
This uses the existing product follow flow to surface future filing-backed changes without guessing what they mean.
What Changed
- Largest disclosed position: C4 Therapeutics, Inc. ($135,921).
- Past-year value change for that position: .
Why This Matters
- This page translates Forms 3/4/5 into a quick ownership context before you inspect each transaction row.
- You can cross-check role, issuer, and filing chronology directly against the SEC source.
Source Evidence
Filed on Form 4
See Original Filing
Insider ownership context is sourced from SEC Forms 3, 4, and 5.
Ownership of Mark Mossler
| Symbol | Company | Relationship | Holdings Value | Past Year Net Change | Change % | Report Period |
|---|---|---|---|---|---|---|
| CCCC | C4 Therapeutics, Inc. | Chief Accounting Officer | $135,921 | 13 Feb 2026 |
Insider Transactions Reported by Mark Mossler:
| Sym | Company | Class | Transaction | % | Value $ | * Price $ | Shares | Shares After | Date | Ownership |
|---|
* An asterisk sign (*) next to the price indicates that the price is likely invalid.