Adagio Medical Holdings, Inc (ADGM)
Nasdaq: ADGM · Surgical & Medical Instruments & Apparatus · Laguna Hills, CA · filing with the SEC since 2024
Who owns Adagio Medical Holdings, Inc
As filed with the SECHolders of 5% or more
5
Perceptive Advisors LLC holds 55.4% of Common Stock, par value $0.0001 per share, as its SCHEDULE 13G/A filed May 15, 2026 says.
Directors and officers
11
report now, of 17 people on the record since 2024. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 5 named at left.
Holders of 5% or moreshare of the class, as filed
Perceptive Advisors LLC
SCHEDULE 13G/A · filed May 15, 2026 · Common Stock, par value $0.0001 per share · 57.5% in Feb 17, 2026
Alyeska Investment Group, L.P.
SCHEDULE 13G · filed Feb 17, 2026 · Common Stock, par value $0.0001per share
RA Capital Management, L.P.
SCHEDULE 13G/A · filed Aug 26, 2025 · Common Stock, par value $0.0001 per share · 0% in Aug 14, 2025
Adage Capital Management, L.P.
SCHEDULE 13G/A · filed May 13, 2026 · Common Stock, par value $0.0001 per share · 6.88% in Nov 13, 2025
ADAR1 Capital Management, LLC
SCHEDULE 13G/A · filed Aug 14, 2026 · Common Stock, par value $0.0001 per share · 5.7% in Feb 17, 2026
Sio Capital Management, LLC
SCHEDULE 13G/A · filed Jul 28, 2026 · Common Stock, par value, $0.0001 per share · reported falling below 5%, from 6.08% in Feb 11, 2026
What ADGM reports owning in othersstakes of 5% or more, and other ties
Other ties the annual report names
ARYA Sciences Acquisition Corp IV
An entity · legal entity · owns, named in the 10-K filed Mar 27, 2026
Legacy Adagio
A company bought · acquisition · Jul 2024 · owns, named in the 10-K filed Mar 27, 2026
Insider tradesForm 4
0sales
2purchases
0sales on a scheduled plan
0people selling
$0sold, in dollars
$200,000bought, in dollars
Open-market trades on Form 4 from Oct 13, 2025 to Oct 13, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2025 runs to Oct 13, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window2 of 20 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Usen Todd | Chief Executive Officer | 0 | $0 | 0 | 1 | $200,000 |
| Kaster Deborah | Chief Financial Officer | 0 | $0 | 0 | 1 | $0 |