ADGM: Adagio Medical Holdings, Inc. insider trading, 5% holders and institutional ownership
From public SEC filings: open-market insider purchases and sales (Form 4, last 180 days), holders of 5% or more (Schedules 13D and 13G) and institutional ownership (Form 13F). Insider and 5% data delayed 48 hours.
Insider trading
0 open-market buys totaling - and 0 sales totaling - in the last 180 days.
Activist and 5% holders
| Filed | What | Holder | Stake | Change | Filing |
|---|---|---|---|---|---|
| 2026-08-14 | 13G amendment | ADAR1 Capital Management, LLC | 5.40% | SEC | |
| 2026-07-28 | Fell below 5% | Sio Capital Management, LLC | 3.15% | SEC |
Institutional ownership (Q2 2026)
24 institutions reported holding $9.82M of Adagio Medical Holdings, Inc. on Form 13F (23 the quarter before). 4 opened a new position and 3 sold out. Shares held by institutions: -4%.
| Largest holders | Shares | Value |
|---|---|---|
| PERCEPTIVE ADVISORS LLC | 9,876,586 | $6.44M |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 1,258,501 | $820K |
| ADAR1 Capital Management, LLC | 1,205,447 | $785K |
| Alyeska Investment Group, L.P. | 1,159,615 | $756K |
| Sio Capital Management, LLC | 698,989 | $455K |
| SILVERARC CAPITAL MANAGEMENT, LLC | 224,360 | $146K |
| Shaolin Capital Management LLC | 171,170 | $112K |
| VANGUARD CAPITAL MANAGEMENT LLC | 108,954 | $71K |
| Affinity Asset Advisors, LLC | 80,000 | $52K |
| GEODE CAPITAL MANAGEMENT, LLC | 79,115 | $52K |
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