Adagio Medical Holdings
ADGM on Nasdaq. Market value $3m.
Should I look at this?
Look carefully before going further
Why it could be worth it
Nothing stands out yet.
What to watch out for
Read the warning sign in its own filings
This is not advice.
Who owns it
None of the long-term investors we follow own it. 24 funds in all.
Largest holders overall
- Perceptive Advisors$6m
- Adage Capital Partners GP, L.L.C.$820,039
- ADAR1 Capital Management$785,469
- Alyeska Investment Group, L.P.$755,605
- Sio Capital Management$455,461Cut
- Silverarc Capital Management$146,193Cut
- Shaolin Capital Management$111,534
- Vanguard Capital Management$71,038Added
- Affinity Asset Advisors$52,128
- Geode Capital Management$51,550Cut
From 13F filings for the quarter ended 30 June 2026.
Big holders and activists
5 investors own more than 5%.
- Perceptive Advisors LLCPassive investorat least 55.4%−2.1 pts(filed with 3 related holders)Since 31 March 2026
- Alyeska Investment Group, L.P.Passive investorat least 9.9%(filed with 2 related holders)Since 31 December 2025
- RA Capital Management, L.P.Passive investorat least 7.2%+7.2 pts(filed with 3 related holders)Since 30 June 2025
- Adage Capital Management, L.P.Passive investorat least 5.7%−1.2 pts(filed with 2 related holders)Since 31 March 2026
- ADAR1 Capital Management, LLCPassive investorat least 5.4%−0.3 pts(filed with 1 related holder)Since 30 June 2026
- Sio Capital Management, LLCPassive investorSold down below 5%Since 30 June 2026
| Holder | Stake | Since | |
|---|---|---|---|
Perceptive Advisors LLC Passive investor | at least 55.4%−2.1 pts (filed with 3 related holders) | 31 March 2026 | |
Alyeska Investment Group, L.P. Passive investor | at least 9.9% (filed with 2 related holders) | 31 December 2025 | |
RA Capital Management, L.P. Passive investor | at least 7.2%+7.2 pts (filed with 3 related holders) | 30 June 2025 | |
Adage Capital Management, L.P. Passive investor | at least 5.7%−1.2 pts (filed with 2 related holders) | 31 March 2026 | |
ADAR1 Capital Management, LLC Passive investor | at least 5.4%−0.3 pts (filed with 1 related holder) | 30 June 2026 | |
Sio Capital Management, LLC Passive investor | Sold down below 5% | 30 June 2026 |
From Schedule 13D and 13G filings: anyone owning more than 5% must file one.
What insiders did
In the last 12 months, 2 insiders bought $243,973 of shares on the open market.
- Kaster DeborahChief Financial OfficerBought
- Date
- 16 December 2025
- Shares
- 15,000
- Price
- $1.20
- Value
- $18,000
- Usen ToddChief Executive Officer, DirectorBought
- Date
- 12 December 2025
- Shares
- 207,315
- Price
- $1.09
- Value
- $225,973
| Date | Who | Did | Shares | Price | Value |
|---|---|---|---|---|---|
| 16 December 2025 | Kaster Deborah Chief Financial Officer | Bought | 15,000 | $1.20 | $18,000 |
| 12 December 2025 | Usen Todd Chief Executive Officer, Director | Bought | 207,315 | $1.09 | $225,973 |
From Form 4 filings: insiders must report trades in their own company's shares within two days.
Warning signs in its filings
Problems the company itself reported to the SEC, in its own words.
2 serious warning signs in Adagio Medical Holdings’ filings.
We look for five warning signs: doubt it can keep going, weak checks on its own accounts, a notice that its past accounts can't be relied on, a change of auditor, and one customer bringing in a big share of sales. We don't check lawsuits, investigations or debt yet.
We checked the auditor's report, internal controls, restatement notices, auditor changes and big customers in the 10-K filed 27 Mar 2026, plus the 10-Q filed 11 Aug 2026 and 12 later 8-Ks.
Doubt it can keep going
SeriousThe company or its auditor warned it may not have enough money to last the next year.
“These factors raise substantial doubt about our ability to continue as a going concern for the twelve-month period from the date of this filing with the SEC.”
Show the full paragraph
As of the report date, we do not believe our existing cash and cash equivalents are sufficient to fund our operating and capital expenditure requirements for at least 12 months from the date of issuance of the audited consolidated financial statements included in this Report. Based on our current research and development plans, we expect to have sufficient resources to fund our planned operations into the fourth quarter of 2026. We have based this estimate on assumptions that may prove to be wrong, and we could exhaust our capital resources sooner than expected. No assurance can be given as to whether additional needed financing will be available on terms acceptable to us, if at all. If sufficient funds on acceptable terms are not available when needed, we may be required to suspend or forego certain planned activities. Failure to manage discretionary spending or raise additional financing, as needed, could adversely impact our ability to achieve our intended business objectives and may have an adverse effect on our results of operations and future prospects. These factors raise substantial doubt about our ability to continue as a going concern for the twelve-month period from the date of this filing with the SEC. Refer to Note 1 - Description of Organization and Business Operations in our condensed consolidated financial statements for additional information on the going concern assessment.
From the 10-Q filed 11 August 2026, Part I, Item 2. Management's Discussion and Analysis. Read it in the filing
Its past accounts can't be relied on
SeriousIt told the SEC its earlier accounts should no longer be relied on, usually because they contained errors.
8-K Item 4.02 filed 1 Nov 2024: the company said its earlier financial statements should no longer be relied on.
From an 8-K filed 1 November 2024: Previously issued accounts should no longer be relied on. Open the filing
A 10-K is the yearly report every US company files with the SEC. An 8-K is a short notice of a big event.
The deep dive
Everything above is arithmetic on public filings. The deep dive reads the last ten years of annual reports, the proxy statements, and the earnings calls, then argues the case the way Buffett, Klarman, and Hohn would, and checks every claim against the source.
- What the business is worth, as a range, and the margin of safety at today’s price
- Prices to start buying, buy, and buy hard
- The three things that would make this a mistake
- Every number footnoted to the filing it came from
Your first deep dive is free.
Not advice. Numbers on this page come from SEC filings and are updated each night; prices are updated again after the US market closes. The five-year figures are rounded.