Quick Takeaways
- John D. Quisel has 2 issuer positions tracked on this page.
- Estimated disclosed ownership value: $14,210,383.
- Recent insider filing activity is available below.
- Info
- Insider Ownership
Insider Trading & Ownership of John D. Quisel
- Location
- Cambridge, MA
- Summary
- The estimated net worth of John D. Quisel is at least $14,210,383 dollars as of 17 Feb 2026. John D. Quisel is the Chief Executive Officer, Director of Disc Medicine, Inc. and owns shares of Disc Medicine, Inc. (IRON) stock worth about $14.21M.
- Signature
- By: /s/ Rahul Khara, as Attorney-in-Fact
- All Insider Reports
- All Insider Reports
Follow Filing Activity
Follow John D. Quisel and return when a new Insider Trading filing appears.
This tracks SEC filing changes for this page using existing product update flows.
What Changed
- Largest disclosed position: Disc Medicine, Inc. ($14,210,383).
- Past-year value change for that position: -$6,767,686.
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.
Official SEC Source
Filed on Form 4
Insider ownership context is sourced from SEC Forms 3, 4, and 5.
See Original FilingOwnership of John D. Quisel
| Symbol | Company | Relationship | Holdings Value | Past Year Net Change | Change % | Report Period |
|---|---|---|---|---|---|---|
| IRON | Disc Medicine, Inc. | Chief Executive Officer, Director | $14,210,383 | -$6,767,686 | -32% | 17 Feb 2026 |
| GOSS | Gossamer Bio, Inc. | Director | 25 Jun 2025 |
Insider Transactions Reported by John D. Quisel:
| 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.