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Mirion Technologies, Inc.

MIR
Exchange
NYSE
Industry
Measuring & Controlling Devices, NEC
SEC CIK
0001809987

In the last 90 days, Mirion Technologies, Inc. insiders filed 1 open-market purchase and 0 sales; 351 institutions reported holding it in 13F filings for Q2 2026, worth $4.70B in total; Maverick Capital is the only superinvestor holding it.

Q3 2025 vs. Q2 2025

How the institutions holding Mirion Technologies, Inc. changed between Q2 2025 and Q3 2025.

All holders in Q3 2025All holders in Q2 2025

13F holders of MIR: Q2 2025 compared with Q3 2025
MeasureQ2 2025Of which not filed for Q3 2025Q3 2025Change
Holders3023343+44
Shares207.4M26.9K255.0M+47.7M (+23.0%)
Value$4.46B$579.9K$5.93B+$1.47B (+32.9%)

3 institutions that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so the changes leave them out.

New holders (91)

Institutions that held Mirion Technologies, Inc. at the end of Q3 2025 but not at the end of Q2 2025.

Institutions new to MIR in Q3 2025
InstitutionSharesValue% of portfolio
Two Creeks Capital Management, LP3,598,763$83.7M6.02%
Conestoga Capital Advisors, LLC1,351,785$31.4M0.50%
TimesSquare Capital Management, LLC1,013,339$23.6M0.34%
Public Sector Pension Investment Board956,160$22.2M0.08%
Keystone Investors Pte Ltd881,593$20.5M2.37%
Ghisallo Capital Management LLC774,900$18.0M0.59%
Alta Park Capital, LP611,161$14.2M1.43%
Yaupon Capital Management LP525,000$12.2M0.63%
Bamco Inc500,000$11.6M0.03%
Sculptor Capital LP500,000$11.6M0.16%
Peregrine Capital Management LLC443,066$10.3M0.31%
Burkehill Global Management, LP350,000$8.14M0.46%
Pinnbrook Capital Management LP335,070$7.79M1.44%
Great West Life Assurance Co324,608$7.31M0.01%
Empowered Funds, LLC291,064$6.77M0.07%
Maven Securities LTD275,000$6.40M1.22%
Zimmer Partners, LP200,000$4.65M0.11%
Thrivent Financial for Lutherans179,781$4.18M0.01%
Montanaro Asset Management Ltd171,600$3.99M1.00%
State of Alaska, Department of Revenue125,407$2.92M0.03%
Kennedy Capital Management, Inc.124,571$2.90M0.06%
Element Capital Management LLC115,578$2.69M3.81%
Macquarie Group Ltd114,724$2.67M0.00%
Louisiana State Employees Retirement System104,800$2.44M0.04%
Monashee Investment Management LLC100,000$2.33M1.16%
Ovata Capital Management Ltd100,000$2.33M0.47%
Freestone Grove Partners LP77,415$1.80M0.01%
Davidson Kempner Capital Management LP75,000$1.74M0.02%
Yousif Capital Management, LLC74,991$1.74M0.02%
Lisanti Capital Growth, LLC67,175$1.56M0.38%
Commonwealth of Pennsylvania Public School Empls Retrmt Sys62,446$1.45M0.01%
State of Tennessee, Treasury Department57,420$1.34M0.00%
Oregon Public Employees Retirement Fund55,200$1.28M0.02%
New York State Teachers Retirement System54,536$1.27M0.00%
Teachers Retirement System of the State of Kentucky52,500$1.22M0.01%
Hel Ved Capital Management Ltd49,800$1.16M0.63%
Federated Hermes, Inc.44,963$1.05M0.00%
Fund 1 Investments, LLC43,900$1.02M0.13%
IMC-Chicago, LLC42,689$992.9K0.02%
1832 Asset Management L.P.40,000$930.4K0.00%
Maryland State Retirement & Pension System35,417$823.8K0.02%
Prelude Capital Management, LLC31,282$727.6K0.06%
Virtu Financial LLC27,771$646.0K0.04%
Polymer Capital Management (US) LLC27,682$643.9K0.09%
Mutual of America Capital Management LLC27,457$638.6K0.01%
CIBC Bancorp USA Inc.25,060$582.9K0.00%
Dymon Asia Capital (Singapore) Pte. Ltd.17,100$397.7K0.16%
Natixis Advisors, L.P.14,096$328.0K0.00%
CI Private Wealth, LLC12,411$288.7K0.00%
Glenmede Investment Management, LP11,959$278.2K0.00%
Diametric Capital, LP11,448$266.3K0.10%
Profund Advisors LLC11,287$262.5K0.01%
Van Eck Associates Corp10,500$244.0K0.00%
Stratos Wealth Partners, LTD.10,083$234.5K0.00%
O'Shaughnessy Asset Management, LLC10,021$233.1K0.00%
Swiss Life Asset Management Ltd9,832$228.7K0.00%
Verdence Capital Advisors LLC8,814$216.3K0.01%
Absher Wealth Management, LLC9,000$209.3K0.03%
Aster Capital Management (DIFC) Ltd8,070$187.7K0.09%
Torno Capital, LLC6,410$149.1K0.02%
GWM Advisors LLC4,628$107.6K0.00%
Salomon & Ludwin, LLC1,270$30.5K0.00%
Wolff Wiese Magana LLC1,100$25.6K0.01%
Quadrant Capital Group LLC1,065$24.8K0.00%
Advisory Services Network, LLC1,058$24.6K0.00%
Zazove Associates LLC1,000$23.3K0.00%
TD Waterhouse Canada Inc.1,000$23.1K0.00%
Fifth Third Bancorp821$19.1K0.00%
Root Financial Partners, LLC716$16.7K0.00%
Optiver Holding B.V.514$12.0K0.00%
Whittier Trust Co of Nevada Inc500$11.4K0.00%
Umb Bank N A488$11.4K0.00%
Groupe la Francaise400$7.66K0.00%
Millstone Evans Group, LLC292$6.79K0.00%
Caitong International Asset Management Co., Ltd290$6.75K0.00%
Transamerica Financial Advisors, Inc.246$5.72K0.00%
Quarry LP231$5.37K0.00%
Northwestern Mutual Wealth Management Co177$4.12K0.00%
Hantz Financial Services, Inc.170$4.00K0.00%
Stone House Investment Management, LLC90$2.09K0.00%
Harvest Fund Management Co., Ltd93$2.00K0.00%
Sunbelt Securities, Inc.69$1.60K0.00%
Marquette Asset Management, LLC67$1.56K0.00%
Glen Eagle Advisors, LLC62$1.44K0.00%
Wealthspire Advisors, LLC60$1.40K0.00%
Cedar Mountain Advisors, LLC37$8610.00%
Raffa Wealth Management, LLC24$5580.00%
Abound Wealth Management22$5120.00%
Anfield Capital Management, LLC14$3260.00%
Tortoise Investment Management, LLC3$700.00%
Cloud Capital Management, LLC39$00.00%

Sold out (47)

Institutions that held Mirion Technologies, Inc. at the end of Q2 2025 and filed for Q3 2025 without it.

Institutions that sold out of MIR in Q3 2025
InstitutionShares, Q2 2025Value, Q2 2025
ACK Asset Management LLC1,337,000$28.8M
William Blair Investment Management, LLC1,005,847$21.7M
TCW Group Inc731,465$15.7M
Troluce Capital Advisors LLC600,000$12.9M
Shannon River Fund Management LLC555,377$12.0M
Qube Research & Technologies Ltd463,977$9.99M
Moore Capital Management, LP407,413$8.77M
Sona Asset Management (US) LLC314,000$6.76M
Schonfeld Strategic Advisors LLC278,376$5.99M
EAM Global Investors LLC236,179$5.08M
Candelo Capital Management LP203,161$4.37M
Arosa Capital Management LP180,273$3.88M
Balyasny Asset Management LLC167,245$3.60M
Roubaix Capital, LLC166,347$3.58M
Jain Global LLC162,968$3.51M
Neo Ivy Capital Management132,188$2.85M
Renaissance Technologies LLC115,900$2.50M
TT International Asset Management LTD105,551$2.27M
Connor, Clark & Lunn Investment Management Ltd.102,225$2.20M
Susquehanna Advisors Group, Inc.91,689$1.97M
Aristeia Capital LLC86,002$1.85M
Soros Fund Management LLCSuperinvestorSoros Fund Management71,700$1.54M
Y-Intercept (Hong Kong) Ltd71,014$1.53M
Weiss Asset Management LP66,910$1.44M
Highbridge Capital Management LLC57,352$1.23M
Steelhead Partners LLC57,352$1.23M
HBK Investments L P42,998$925.7K
Tenor Capital Management Co., L.P.42,998$925.7K
Options Solutions, LLC38,191$822.3K
Jefferies Financial Group Inc.30,000$645.9K
CSS LLC28,070$604.3K
Graham Capital Management, L.P.25,000$538.3K
HSBC Holdings PLC20,426$442.8K
Cookson Peirce & Co Inc20,000$430.6K
Aigen Investment Management, LP18,596$400.4K
Gotham Asset Management, LLC13,603$292.9K
Baird Financial Group, Inc.12,559$270.4K
Longboard Asset Management, LP11,594$249.6K
Stifel Financial Corp10,466$225.3K
Clear Street Markets LLC2,970$63.9K
Skopos Labs, Inc.1,655$35.6K
University of Texas/Texas Am Investment Managment Co952$20.5K
Annis Gardner Whiting Capital Advisors, LLC546$11.8K
Geneos Wealth Management Inc.149$3.21K
Bryn Mawr Trust Co143$3.08K
Mount Yale Investment Advisors, LLC100$2.15K
UMA Financial Services, Inc.29$625

Not filed for Q3 2025 yet (3)

Institutions that held Mirion Technologies, Inc. at the end of Q2 2025 and haven't filed a 13F for Q3 2025. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding MIR in Q2 2025 that haven't filed for Q3 2025
InstitutionShares, Q2 2025Value, Q2 2025
CIBC World Markets Corp25,892$557.5K
First Horizon Advisors, Inc.1,037$22.3K
Parkworth Wealth Management, Inc.6$129