Latest Period
Q4 2025
Security Snapshot
Adagio Medical Holdings, Inc. - Common Stock, par value $0.0001 per share (ADGM) Institutional Ownership
CUSIP: 00534B100
13F Institutional Holders and Ownership History from Q3 2024 to Q1 2026
Institutions Reporting
21
Shares (Excl. Options)
16,553,523
Price
$1.04
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- Type / Class
- Equity / Common Stock, par value $0.0001 per share
- Symbol
- ADGM on Nasdaq
- Shares outstanding
- 22,195,785
- Price per share
- $1.28
- All holders as of 31 Dec 2025
- Q4 2025
- Total 13F shares
- 16,553,523
- Total reported value
- $17,215,301
- % of total 13F portfolios
- 0%
- Share change
- +4,914,983
- Value change
- +$4,898,407
- Number of holders
- 21
- Price from insider filings
- $1.28
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors
Quick Takeaways
- ADGM - Adagio Medical Holdings, Inc. - Common Stock, par value $0.0001 per share is tracked under CUSIP 00534B100.
- 21 institutions reported positions in Q4 2025.
- 6 significant owners is listed from Schedule 13D/13G reporting.
What Changed
- Holder count moved from 21 to 6 between Q4 2025 and Q1 2026.
- Reported value moved from $17,215,301 to $140,138.
Why This Matters
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Source Evidence
Source: SEC Form 13F
Open SEC Evidence
Latest holder context comes from 21 institutions filings for Q4 2025.
Investment Quick Answers
What is CUSIP 00534B100?
CUSIP 00534B100 identifies ADGM - Adagio Medical Holdings, Inc. - Common Stock, par value $0.0001 per share in SEC 13F datasets.
Where can I see the latest institutional holders?
Review the Q4 2025 holders report and the ownership history table below.
Next ownership checks
Use the next link that matches the question you still need to answer about this security.
- Latest 13F filings when you want to inspect fresh institutional portfolio moves.
- Latest Schedule 13D/13G reports when you need large-owner changes outside the 13F cycle.
- All institutional ownership pages to compare this security with other holder-history pages.
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 00534B100:
Significant Owners of Adagio Medical Holdings, Inc. - Common Stock, par value $0.0001 per share (ADGM) based on Schedule 13D/G filings
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| PERCEPTIVE ADVISORS LLC | 58% | -22% | $14,555,572 | 15,321,655 | 0% | Perceptive Advisors LLC | 31 Dec 2025 | |
| Alyeska Investment Group, L.P. | 9.9% | $1,991,945 | 2,096,784 | Alyeska Investment Group, L.P. | 31 Dec 2025 | |||
| Sio Capital Management, LLC | 6.1% | $1,224,038 | 1,288,461 | Sio Capital Management, LLC | 31 Dec 2025 | |||
| Adage Capital Management, L.P. | 5.7% | -17% | $1,610,881 | +$256,000 | 1,258,501 | +19% | Adage Capital Management, L.P. | 31 Mar 2026 |
| ADAR1 Capital Management, LLC | 5.7% | $1,205,447 | 1,205,447 | ADAR1 Capital Management, LLC | 31 Dec 2025 | |||
| RA CAPITAL MANAGEMENT, L.P. | 7.2% | 0% | $1,656,000 | 1,200,000 | 0% | RA Capital Management, L.P. | 30 Jun 2025 |
As of 31 Dec 2025, 21 institutional investors reported holding 16,553,523 shares of Adagio Medical Holdings, Inc. - Common Stock, par value $0.0001 per share (ADGM). This represents 75% of the company’s total 22,195,785 outstanding shares.
Top 25 Institutional Shareholders
The largest institutional shareholders of Adagio Medical Holdings, Inc. - Common Stock, par value $0.0001 per share (ADGM) together control 75% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| PERCEPTIVE ADVISORS LLC | 44% | 9,876,576 | 0% | 0.19% | $10,271,639 |
| Sio Capital Management, LLC | 5.8% | 1,288,461 | 0.22% | $1,339,999 | |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 5.7% | 1,258,501 | +19% | 0% | $1,308,841 |
| Alyeska Investment Group, L.P. | 5.2% | 1,159,615 | 0% | $1,206,000 | |
| ADAR1 Capital Management, LLC | 5.2% | 1,159,614 | 0.09% | $1,205,999 | |
| SILVERARC CAPITAL MANAGEMENT, LLC | 2.3% | 515,384 | 0.08% | $535,999 | |
| ARMISTICE CAPITAL, LLC | 2.2% | 478,000 | 0.01% | $497,120 | |
| Hudson Bay Capital Management LP | 1.3% | 296,369 | 0% | $308,224 | |
| Shaolin Capital Management LLC | 0.77% | 171,170 | -4.9% | 0.01% | $178,017 |
| Affinity Asset Advisors, LLC | 0.36% | 80,000 | 0% | 0.01% | $83,200 |
| VANGUARD GROUP INC | 0.36% | 79,451 | +140% | 0% | $82,629 |
| GEODE CAPITAL MANAGEMENT, LLC | 0.31% | 68,342 | +89% | 0% | $71,075 |
| TORONTO DOMINION BANK | 0.11% | 25,000 | 0% | 0% | $26,000 |
| NORTHERN TRUST CORP | 0.1% | 21,598 | 0% | $22,462 | |
| HRT FINANCIAL LP | 0.08% | 18,618 | 0% | $19,000 | |
| Opaleye Management Inc. | 0.08% | 18,444 | -83% | 0% | $19,182 |
| XTX Topco Ltd | 0.08% | 18,103 | 0% | $18,827 | |
| BANK OF AMERICA CORP /DE/ | 0.05% | 11,494 | +39534% | 0% | $11,954 |
| Tower Research Capital LLC (TRC) | 0.04% | 8,146 | +291% | 0% | $8,472 |
| Crewe Advisors LLC | 0% | 500 | 0% | $520 | |
| MORGAN STANLEY | 0% | 137 | 0% | $142 | |
| UBS Group AG | 0% | 0 | -100% | $0 | |
| RTW INVESTMENTS, LP | 0% | 0 | -100% | $0 | |
| RENAISSANCE TECHNOLOGIES LLC | 0% | 0 | -100% | $0 | |
| CITIGROUP INC | 0% | 0 | -100% | $0 |
Institutional Holders of Adagio Medical Holdings, Inc. - Common Stock, par value $0.0001 per share (ADGM) across Reporting Periods
| Period | Reported Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 121,919 | $140,138 | -$276,059 | $1.15 | 6 |
| 2025 Q4 | 16,553,523 | $17,215,301 | +$4,898,407 | $1.04 | 21 |
| 2025 Q3 | 11,638,540 | $22,578,784 | -$378,507 | $1.94 | 15 |
| 2025 Q2 | 11,882,184 | $14,927,921 | +$160,006 | $1.30 | 13 |
| 2025 Q1 | 11,593,031 | $9,331,190 | +$632,839 | $0.80 | 14 |
| 2024 Q4 | 10,801,797 | $11,342,157 | -$3,360,595 | $1.05 | 15 |
| 2024 Q3 | 12,019,550 | $31,010,438 | +$31,010,438 | $2.58 | 12 |