MIRION TECHNOLOGIES INC (MIR) Institutional Ownership Changes & 13F Activity

MIRION TECHNOLOGIES INC (MIR). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q2 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Alyeska Investment Group, L.P., Millennium Management Llc, Goldman Sachs Group Inc, Invesco Ltd., and Bamco Inc.

InstitutionTypeChange in sharesChange Position %SharesReported stock balancePortfolio quarterFiling date
Manufacturers Life Insurance Company, TheBuy+12,995+11.6%124,653$2.24MQ2 2026Sep 09, 2026
Parkside Financial Bank & TrustBuy+5+50.0%15$269.00Q2 2026Sep 04, 2026
Citadel Advisors LlcSell-1,790,456-98.2%32,796$588.03KQ2 2026Sep 02, 2026
Corient Private Wealth LlcSell-15,550-56.6%11,931$213.92KQ2 2026Aug 27, 2026
California State Teachers Retirement SystemSell-6,607-2.4%267,489$4.80MQ2 2026Aug 24, 2026
Empowered Funds, LlcSell-725-2.7%26,225$470.21KQ2 2026Aug 17, 2026
Public Employees Retirement System Of OhioBuy+125+15.2%947$16.98KQ2 2026Aug 17, 2026
Alyeska Investment Group, L.P.Buy+6,833,375+252.9%9,534,955$170.96MQ2 2026Aug 14, 2026
Millennium Management LlcSell-4,115,060-80.6%991,741$17.78MQ2 2026Aug 14, 2026
Goldman Sachs Group IncBuy+3,056,937+41.6%10,406,605$186.59MQ2 2026Aug 14, 2026
Invesco Ltd.Buy+2,769,5892,769,589$49.66MQ2 2026Aug 14, 2026
Bamco IncBuy+2,692,335+221.8%3,906,083$70.04MQ2 2026Aug 14, 2026
Maverick Capital LtdBuy+2,595,160+97.9%5,245,039$94.04MQ2 2026Aug 14, 2026
Davidson Kempner Capital Management LpBuy+1,619,9981,619,998$29.05MQ2 2026Aug 14, 2026
Alliancebernstein L.P.Sell-1,320,912-79.9%332,517$6.18MQ2 2026Aug 14, 2026
Ameriprise Financial IncBuy+1,002,2841,002,284$17.97MQ2 2026Aug 14, 2026
Fred Alger Management, LlcSell-753,523-82.8%156,083$2.80MQ2 2026Aug 14, 2026
Exoduspoint Capital Management, LpBuy+605,134605,134$10.85MQ2 2026Aug 14, 2026
Nissay Asset Management Corp /JapanBuy+599,278599,278$10.75MQ2 2026Aug 14, 2026
Nomura Asset Management International Inc.Sell-561,870-77.3%165,408$2.97MQ2 2026Aug 14, 2026
Select Equity Group, L.P.Buy+520,555+49.3%1,576,023$28.26MQ2 2026Aug 14, 2026
Ensign Peak Advisors, IncSell-515,378-81.6%116,040$2.08MQ2 2026Aug 14, 2026
Point72 Asset Management, L.P.Buy+503,238+288.8%677,509$12.15MQ2 2026Aug 14, 2026
Osaic Holdings, Inc.Buy+485,442+262.3%670,489$12.02MQ2 2026Aug 14, 2026
Sei Investments CoBuy+391,116+85.3%849,475$15.23MQ2 2026Aug 14, 2026
Hrt Financial LpBuy+339,916339,916$6.09MQ2 2026Aug 14, 2026
T. Rowe Price Investment Management, Inc.Sell-339,720-2.3%14,288,075$256.19MQ2 2026Aug 14, 2026
Frontier Capital Management Co LlcBuy+298,979298,979$5.36MQ2 2026Aug 14, 2026
Wellington Management Group LlpBuy+261,175+31.2%1,098,987$19.70MQ2 2026Aug 14, 2026
Holocene Advisors, LpBuy+252,658+297.0%337,724$6.06MQ2 2026Aug 14, 2026
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Frequently asked questions about MIR activity

  • Which institutional owners are buying MIR?

    Institutional owners buying MIR 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 MIR activity?

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

  • Is institutional interest in MIR increasing?

    Institutional interest in MIR 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.