ADAGIO MEDICAL HOLDINGS INC (ADGM) Institutional Ownership Changes & 13F Activity

ADAGIO MEDICAL HOLDINGS INC (ADGM). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q4 2025). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Perceptive Advisors Llc, Sio Capital Management, Llc, Adage Capital Partners Gp, L.L.C., Alyeska Investment Group, L.P., and Adar1 Capital Management, Llc.

InstitutionTypeChange in sharesChange Position %SharesReported stock balancePortfolio quarterFiling date
Perceptive Advisors LlcBuy+9,876,576—9,876,576$10.27MQ4 2025Feb 17, 2026
Sio Capital Management, LlcBuy+1,288,461—1,288,461$1.34MQ4 2025Feb 17, 2026
Adage Capital Partners Gp, L.L.C.Buy+1,258,501—1,258,501$1.31MQ4 2025Feb 17, 2026
Adar1 Capital Management, LlcBuy+1,159,614—1,159,614$1.21MQ4 2025Feb 17, 2026
Armistice Capital, LlcBuy+478,000—478,000$497.12KQ4 2025Feb 17, 2026
Shaolin Capital Management LlcBuy+171,170—171,170$178.02KQ4 2025Feb 17, 2026
Opaleye Management Inc.Buy+110,571—110,571$114.99KQ4 2025Feb 17, 2026
Toronto Dominion BankBuy+25,000—25,000$26.00KQ4 2025Feb 17, 2026
Northern Trust CorpBuy+21,598—21,598$22.46KQ4 2025Feb 17, 2026
Xtx Topco LtdBuy+18,103—18,103$18.83KQ4 2025Feb 17, 2026
Bank Of America CorpBuy+11,494—11,494$11.95KQ4 2025Feb 17, 2026
Tower Research Capital Llc (Trc)Buy+8,146—8,146$8.47KQ4 2025Feb 17, 2026
Alyeska Investment Group, L.P.Buy+1,159,615—1,159,615$1.21MQ4 2025Feb 13, 2026
Hudson Bay Capital Management LpBuy+296,369—296,369$308.22KQ4 2025Feb 13, 2026
Affinity Asset Advisors, LlcBuy+80,000—80,000$83.20KQ4 2025Feb 13, 2026
Morgan StanleyBuy+137—137$142.00Q4 2025Feb 13, 2026
Silverarc Capital Management, LlcBuy+515,384—515,384$536.00KQ4 2025Feb 12, 2026
Hrt Financial LpBuy+18,618—18,618$19.00KQ4 2025Feb 12, 2026
Geode Capital Management, LlcBuy+68,342—68,342$71.08KQ4 2025Feb 09, 2026
Crewe Advisors LlcBuy+500—500$520.00Q4 2025Jan 16, 2026
Renaissance Technologies LLCSell-27,000-100.0%0$0.00Q4 2025Nov 13, 2025
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Frequently asked questions about ADGM activity

  • Which institutional owners are buying ADGM?

    Institutional owners buying ADGM include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in ADGM activity?

    "Buy" means an investor increased their reported position in ADGM compared to the prior reporting period. This reflects growing exposure to ADAGIO MEDICAL HOLDINGS INC (ADGM) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in ADGM increasing?

    Institutional interest in ADGM can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.

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