🕵️ DISC Medicine, Inc. ($IRON)
SEC insider & ownership activity, last 12 months · CIK 1816736 · every row links its SEC filing
Over the last 12 months insiders sold $120.9M with no open-market buying against it. AI DMI LLC sold $59.9M in discretionary trades (Oct). Access Industries Holdings LLC trimmed 10.8% → 8.0%; Access Industries Management, LLC trimmed 10.8% → 8.0%. No red-flag 8-Ks in the window.
Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
0 buyers, $0 (0 lots) · 8 sellers, $120.9M (116 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| AI DMI LLC | 0 | – | 1 | $59.9M | Oct 22, 2025 |
| Bitterman Kevin | 0 | – | 62 | $37.7M | Sep 11, 2026 |
| John Quisel | 0 | – | 14 | $12.0M | Aug 17, 2026 |
| Yu Jonathan Yen-Wen | 0 | – | 13 | $5.6M | Aug 25, 2026 |
| William Savage | 0 | – | 8 | $2.3M | Apr 13, 2026 |
| Khara Rahul | 0 | – | 11 | $1.9M | Aug 6, 2026 |
| Jean Franchi | 0 | – | 6 | $1.2M | Apr 14, 2026 |
| Stephenson Pamela | 0 | – | 1 | $348K | Feb 17, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| FMR LLC | 12.8% | 13G | Aug 6, 2026 | filing ↗ | |
| Abigail P. Johnson | 12.8% | 13G | Aug 6, 2026 | filing ↗ | |
| Access Industries Holdings LLC | 8.0% | 13D | Oct 20, 2025 | filing ↗ | |
| Access Industries Management, LLC | 8.0% | 13D | Oct 20, 2025 | filing ↗ | |
| Len Blavatnik | 8.0% | 13D | Oct 20, 2025 | filing ↗ | |
| AI DMI LLC | 8.0% | 13D | Oct 20, 2025 | filing ↗ | |
| Wellington Management Company LLP | 6.4% | 13G | May 12, 2025 | filing ↗ | |
| RA Capital Management, L.P. | 5.9% | 13G | Jan 7, 2026 | filing ↗ | |
| Peter Kolchinsky | 5.9% | 13G | Jan 7, 2026 | filing ↗ | |
| Rajeev Shah | 5.9% | 13G | Jan 7, 2026 | filing ↗ | |
| RA Capital Healthcare Fund, L.P. | 5.9% | 13G | Jan 7, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Kevin J. Bitterman | $1.9M | Sep 11, 2026 | filing ↗ |
| Atlas Venture Fund XII, LP | $1K | Sep 4, 2026 | filing ↗ |
| Atlas Venture Opportunity Fund II, LP | $60K | Sep 4, 2026 | filing ↗ |
| Atlas Venture Opportunity Fund I, LP | $72K | Sep 4, 2026 | filing ↗ |
| Atlas Venture Fund X, LP | $176K | Sep 4, 2026 | filing ↗ |
| Atlas Venture Fund XII, LP | $4K | Sep 3, 2026 | filing ↗ |
| Atlas Venture Opportunity Fund II, LP | $187K | Sep 3, 2026 | filing ↗ |
| Atlas Venture Opportunity Fund I, LP | $225K | Sep 3, 2026 | filing ↗ |
| Atlas Venture Fund X, LP | $546K | Sep 3, 2026 | filing ↗ |
| Atlas Venture Fund XII, LP | $40K | Sep 2, 2026 | filing ↗ |
| Atlas Venture Opportunity Fund II, LP | $1.7M | Sep 2, 2026 | filing ↗ |
| Atlas Venture Opportunity Fund I, LP | $2.1M | Sep 2, 2026 | filing ↗ |
| Atlas Venture Fund X, LP | $5.1M | Sep 2, 2026 | filing ↗ |
| John Quisel | $2.6M | Aug 17, 2026 | filing ↗ |
| Rahul Khara | $395K | Aug 6, 2026 | filing ↗ |
| John Quisel | $2.5M | Jul 13, 2026 | filing ↗ |
| Jonathan Yu | $770K | Jul 7, 2026 | filing ↗ |
| Rahul Khara | $175K | Jun 26, 2026 | filing ↗ |
| Jonathan Yu | $708K | Jun 22, 2026 | filing ↗ |
| John Quisel | $2.4M | Jun 18, 2026 | filing ↗ |
| Rahul Khara | $527K | Jun 18, 2026 | filing ↗ |
| Jonathan Yu | $1.3M | Jun 16, 2026 | filing ↗ |
| William Savage | $380K | Apr 13, 2026 | filing ↗ |
| William Savage | $492K | Mar 2, 2026 | filing ↗ |
| Jean Franchi | $464K | Feb 25, 2026 | filing ↗ |
| Jean Franchi | $464K | Feb 18, 2026 | filing ↗ |
| Khara Rahul | $160K | Feb 17, 2026 | filing ↗ |
| Stephenson Pamela | $309K | Feb 17, 2026 | filing ↗ |
| Savage William Jacob | $182K | Feb 17, 2026 | filing ↗ |
| Yu Jonathan Yen-Wen | $181K | Feb 17, 2026 | filing ↗ |
| Jean M. Franchi | $228K | Feb 17, 2026 | filing ↗ |
| John D. Quisel | $742K | Feb 17, 2026 | filing ↗ |
| Rahul Khara | $596K | Jan 2, 2026 | filing ↗ |
| Atlas Venture Fund XII, LP | $14K | Dec 17, 2025 | filing ↗ |
| Atlas Venture Opportunity Fund II, LP | $19K | Dec 17, 2025 | filing ↗ |
| Atlas Venture Opportunity Fund I, LP | $36K | Dec 17, 2025 | filing ↗ |
| Atlas Venture Fund X, LP | $75K | Dec 17, 2025 | filing ↗ |
| AI DMI LLC | $4K | Dec 17, 2025 | filing ↗ |
| Atlas Venture Opportunity Fund I, LP | $1.0M | Dec 16, 2025 | filing ↗ |
| Atlas Venture Fund XII, LP | $401K | Dec 16, 2025 | filing ↗ |
| Atlas Venture Opportunity Fund II, LP | $521K | Dec 16, 2025 | filing ↗ |
| Atlas Venture Fund X, LP | $2.1M | Dec 16, 2025 | filing ↗ |
| AI DMI LLC | $3.6M | Dec 16, 2025 | filing ↗ |
| Atlas Venture Opportunity Fund I, L.P. | $2.3M | Dec 16, 2025 | filing ↗ |
| Atlas Venture Fund X, L.P. | $4.8M | Dec 16, 2025 | filing ↗ |
| Atlas Venture Opportunity Fund II, L.P. | $1.2M | Dec 16, 2025 | filing ↗ |
| Atlas Venture Associates XII, L.P. | $915K | Dec 16, 2025 | filing ↗ |
| Kevin J. Bitterman | $643K | Dec 15, 2025 | filing ↗ |
| William Savage | $1.2M | Dec 15, 2025 | filing ↗ |
| Atlas Venture Opportunity Fund II, LP | $736K | Dec 15, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Reg FD disclosure (7.01) | Sep 9, 2026 | filing ↗ |
| Other events (8.01) | Sep 9, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Sep 9, 2026 | filing ↗ |
| Earnings (2.02) | Jul 30, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 30, 2026 | filing ↗ |
| Material agreement (1.01) | Jun 25, 2026 | filing ↗ |
| New financial obligation (2.03) | Jun 25, 2026 | filing ↗ |
| Shareholder vote (5.07) | Jun 18, 2026 | filing ↗ |
| Earnings (2.02) | May 5, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 5, 2026 | filing ↗ |
| Exit or disposal costs (2.05) | Feb 26, 2026 | filing ↗ |
| Earnings (2.02) | Feb 26, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 26, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Feb 17, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 17, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Feb 13, 2026 | filing ↗ |
| Other events (8.01) | Feb 13, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 13, 2026 | filing ↗ |
| Earnings (2.02) | Jan 12, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jan 12, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 12, 2026 | filing ↗ |
| Other events (8.01) | Dec 7, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Dec 7, 2025 | filing ↗ |
| Earnings (2.02) | Nov 6, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 6, 2025 | filing ↗ |
| Material agreement (1.01) | Oct 20, 2025 | filing ↗ |
| Other events (8.01) | Oct 20, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 20, 2025 | filing ↗ |
| Earnings (2.02) | Oct 20, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Oct 20, 2025 | filing ↗ |