Quick Takeaways
- Timothy P. Clackson has 4 issuer positions tracked on this page.
- Estimated disclosed ownership value: $214,649.
- Recent insider filing activity is available below.
- Info
- Insider Ownership
Insider Trading & Ownership of Timothy P. Clackson
- Location
- Cambridge, MA
- Summary
- The estimated net worth of Timothy P. Clackson is at least $214,649 dollars as of 24 Jul 2025. Timothy P. Clackson is the President and CEO, Director of Theseus Pharmaceuticals, Inc. and owns shares of Theseus Pharmaceuticals, Inc. stock worth about $139.2K. Timothy P. Clackson is the 10%+ Owner of Xilio Therapeutics, Inc. and owns shares of Xilio Therapeutics, Inc. (XLO) stock worth about $75.5K.
- Signature
- /s/ Robert Yang, Attorney-in-Fact
- All Insider Reports
- All Insider Reports
Follow Filing Activity
Follow Timothy P. Clackson 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: Theseus Pharmaceuticals, Inc. ($139,156).
- 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 Timothy P. Clackson
| Symbol | Company | Relationship | Holdings Value | Past Year Net Change | Change % | Report Period |
|---|---|---|---|---|---|---|
| THRX | Theseus Pharmaceuticals, Inc. | President and CEO, Director | $139,156 | 01 Mar 2023 | ||
| XLO | Xilio Therapeutics, Inc. | 10%+ Owner | $75,493 | 21 Oct 2021 | ||
| ELEV | Elevation Oncology, Inc. | Director | $0 | 23 Jul 2025 | ||
| FMTX | Forma Therapeutics Holdings, Inc. | Director | 14 Oct 2022 |
Insider Transactions Reported by Timothy P. Clackson:
| 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.