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Delisting risk

ADGM · NASDAQ · Medical - Devices

Adagio Medical (ADGM)

Catheter-based ablation systems for ventricular tachycardia built on ultra-low-temperature technology.

$0.5250

Pre-market−0.01 (−1.74%)

At close$0.5343(+4.27%)

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Breakdown13F · 13D/G · Form 4

Institutions23 holders · as of Mar 31, 2026	70.50%	15.66M shares
Insiders2 holders · as of Dec 18, 2025	1.00%	222.3K shares
Otherremainder	28.50%	6.33M shares

22.21M company shares as of Sep 3, 2026 · institutions as of Mar 31, 2026 · holders as of their latest filing

Top shareholders13F · 13D/G · Form 4

Holder	Stake	Shares	Evidence
Perceptive Advisors LLCInstitution	44.47%	9.88M	13Fas of Mar 31, 2026
Sio Capital Management, LLCInstitution	5.80%	1.29M	13Fas of Mar 31, 2026
Adage Capital Partners GP, L.L.C.Institution	5.67%	1.26M	13Fas of Mar 31, 2026
Adage Capital Management, L.P.Institution	5.67%	1.26M	13Gfiled May 13, 2026 ↗
Adar1 Capital Management, LLCInstitution	5.43%	1.21M	13Fas of Mar 31, 2026
RA Capital Management, L.P.Institution	5.40%	1.20M	13Gfiled Aug 26, 2025 ↗
Alyeska Investment Group, L.P.Institution	5.22%	1.16M	13Fas of Mar 31, 2026
Silverarc Capital Management, LLCInstitution	1.13%	251,972	13Fas of Mar 31, 2026
Todd UsenInsiderdirector, officer: Chief Executive Officer	0.93%	207,315	Form 4filed Dec 15, 2025 ↗
Shaolin Capital Management LLCInstitution	0.77%	171,170	13Fas of Mar 31, 2026
Geode Capital Management, LLCInstitution	0.56%	125,241	13Fas of Mar 31, 2026
Affinity Asset Advisors, LLCInstitution	0.36%	80,000	13Fas of Mar 31, 2026
Vanguard Fiduciary Trust CoInstitution	0.24%	53,782	13Fas of Mar 31, 2026
Vanguard Capital Management LLCInstitution	0.18%	39,608	13Fas of Mar 31, 2026
Granite Investment Partners, LLCInstitution	0.12%	27,053	13Fas of Mar 31, 2026
Toronto Dominion BankInstitution	0.11%	25,000	13Fas of Mar 31, 2026
XTX Topco LtdInstitution	0.11%	23,350	13Fas of Mar 31, 2026
Northern Trust CorpInstitution	0.10%	21,598	13Fas of Mar 31, 2026
Opaleye Management Inc.Institution	0.08%	18,444	13Fas of Mar 31, 2026
Renaissance Technologies LLCInstitution	0.07%	16,557	13Fas of Mar 31, 2026
Deborah KasterInsiderofficer: Chief Financial Officer	0.07%	15,000	Form 4filed Dec 18, 2025 ↗
Bank of America Corp /DE/Institution	0.06%	12,857	13Fas of Mar 31, 2026
Tower Research Capital LLC (TRC)Institution	0.01%	2,202	13Fas of Mar 31, 2026
JPMorgan Chase & CoInstitution	0.00%	975	13Fas of Mar 31, 2026
Crewe Advisors LLCInstitution	0.00%	500	13Fas of Mar 31, 2026

13F — a manager's quarterly holdings · 13D/13G — an ownership statement filed at 5% or more · Form 4 — an insider's transaction report

Institutions13F, as of Mar 31, 2026

23 holders · 15.66M shares · 6 new positions · 10 increased · 2 reduced · 4 closed

Holder	Shares	% outstanding	Chg q/q	Filed
Perceptive Advisors LLC	9.88M	44.47%	0	May 29, 2026
Sio Capital Management, LLC	1.29M	5.80%	0	May 14, 2026
Adage Capital Partners GP, L.L.C.	1.26M	5.67%	0	May 15, 2026
Adar1 Capital Management, LLC	1.21M	5.43%	+45.8K	May 18, 2026
Alyeska Investment Group, L.P.	1.16M	5.22%	0	May 15, 2026
Silverarc Capital Management, LLC	252.0K	1.13%	−263.4K	May 14, 2026
Shaolin Capital Management LLC	171.2K	0.77%	0	May 15, 2026
Geode Capital Management, LLC	125.2K	0.56%	+56.9K	May 15, 2026

Ownership statements13D/G · 5% or more, as filed

Holder	% of class	Shares	Form	Filed
Perceptive Advisors LLC	55.40%	15.32M	13G	May 15, 2026 ↗
Alyeska Investment Group, L.P.	9.90%	2.10M	13G	Feb 17, 2026 ↗
RA Capital Management, L.P.	7.20%	1.20M	13G	Aug 26, 2025 ↗
Sio Capital Management, LLC	6.08%	1.29M	13G	Feb 11, 2026 ↗
ADAR1 Capital Management, LLC	5.70%	1.21M	13G	Feb 17, 2026 ↗
Adage Capital Management, L.P.	5.67%	1.26M	13G	May 13, 2026 ↗

Insider tradesForm 4

Latest trades

Date	Insider	Type	Shares	Avg price	Owned after
Dec 16, 2025	Deborah Kasterofficer: Chief Financial Officer	Purchase	15,000	$1.20	15,000
Dec 12, 2025	Todd Usendirector, officer: Chief Executive Officer	Purchase	207,315	$1.09	207,315
Oct 20, 2025	Perceptive Advisors LLCdirector, 10 percent owner:	Purchase · 4 lots	6,225,493	$1.11	6,225,493

CongressHouse and Senate disclosures

Not reported.