🕵️ Adagio Medical Holdings, Inc. ($ADGM)
SEC insider & ownership activity, last 12 months · CIK 2006986 · every row links its SEC filing
Over the last 12 months insiders bought $4.5M with no open-market selling against it. Perceptive Advisors LLC bought $4.3M (Oct). One red-flag 8-K in the window: Delisting notice (3.01), Jun 12, 2026.
Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
3 buyers, $4.5M (6 lots) · 0 sellers, $0 (0 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Perceptive Advisors LLC | 4 | $4.3M | 0 | – | Oct 20, 2025 |
| Usen Todd | 1 | $226K | 0 | – | Dec 12, 2025 |
| Kaster Deborah | 1 | $18K | 0 | – | Dec 16, 2025 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Perceptive Advisors LLC | 55.4% | 13G | May 15, 2026 | filing ↗ | |
| Joseph Edelman | 55.4% | 13G | May 15, 2026 | filing ↗ | |
| Perceptive Life Sciences Master Fund, Ltd. | 54.7% | 13G | May 15, 2026 | filing ↗ | |
| Alyeska Investment Group, L.P. | 9.9% | 13G | Feb 17, 2026 | filing ↗ | |
| Alyeska Fund GP, LLC | 9.9% | 13G | Feb 17, 2026 | filing ↗ | |
| Anand Parekh | 9.9% | 13G | Feb 17, 2026 | filing ↗ | |
| RA Capital Management, L.P. | 7.2% | 13G | Aug 26, 2025 | filing ↗ | |
| Peter Kolchinsky | 7.2% | 13G | Aug 26, 2025 | filing ↗ | |
| Rajeev Shah | 7.2% | 13G | Aug 26, 2025 | filing ↗ | |
| RA Capital Healthcare Fund, L.P. | 6.9% | 13G | Aug 26, 2025 | filing ↗ | |
| ADAR1 Capital Management, LLC | 5.7% | 13G | Feb 17, 2026 | filing ↗ | |
| Daniel Schneeberger | 5.7% | 13G | Feb 17, 2026 | filing ↗ | |
| Adage Capital Management, L.P. | 5.7% | 13G | May 13, 2026 | filing ↗ | |
| Robert Atchinson | 5.7% | 13G | May 13, 2026 | filing ↗ | |
| Phillip Gross | 5.7% | 13G | May 13, 2026 | filing ↗ | |
| SIO Capital Management, LLC | exited | 13G | Jul 28, 2026 | filing ↗ |
Planned insider sales (Form 144)
No sale notices filed in the last 12 months.
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Shareholder vote (5.07) | Jun 16, 2026 | filing ↗ |
| Delisting notice (3.01) | Jun 12, 2026 | filing ↗ |
| Other events (8.01) | May 21, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 21, 2026 | filing ↗ |
| Earnings (2.02) | May 12, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 12, 2026 | filing ↗ |
| Other events (8.01) | Apr 26, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 26, 2026 | filing ↗ |
| Shareholder Nominations Pursuant to Exchange Act Rule 14a-11 (5.08) | Apr 20, 2026 | filing ↗ |
| Other events (8.01) | Apr 8, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 8, 2026 | filing ↗ |
| Earnings (2.02) | Mar 26, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 26, 2026 | filing ↗ |
| Shareholder vote (5.07) | Dec 15, 2025 | filing ↗ |
| Officer/director changes (5.02) | Dec 11, 2025 | filing ↗ |
| Earnings (2.02) | Nov 12, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 12, 2025 | filing ↗ |
| Shareholder Nominations Pursuant to Exchange Act Rule 14a-11 (5.08) | Oct 23, 2025 | filing ↗ |
| Other events (8.01) | Oct 20, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 20, 2025 | filing ↗ |
| Material agreement (1.01) | Oct 14, 2025 | filing ↗ |
| Unregistered equity sale (3.02) | Oct 14, 2025 | filing ↗ |
| Other events (8.01) | Oct 14, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 14, 2025 | filing ↗ |
| Other events (8.01) | Oct 10, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 10, 2025 | filing ↗ |
| Other events (8.01) | Oct 1, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 1, 2025 | filing ↗ |
| Officer/director changes (5.02) | Sep 3, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Sep 3, 2025 | filing ↗ |