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.
13F holders, Q3 2025
Institutional positions in Mirion Technologies, Inc. as of Sep 30, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 343
- +44 vs. Q2 2025
- Shares held
- 255.0M
- +47.7M (+23.0%) vs. Q2 2025
- Total value
- $5.93B
- +$1.47B (+32.9%) vs. Q2 2025
- New holders
- 91
- 129 more added
- Sold out
- 47
- 91 more reduced
3 institutions that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting MIR on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 351 | $4.70B |
| Q1 2026 | 362 | $4.71B |
| Q4 2025 | 365 | $5.91B |
| Q3 2025 | 343 | $5.93B |
| Q2 2025 | 302 | $4.46B |
| Q1 2025 | 230 | $2.69B |
| Q4 2024 | 224 | $3.38B |
| Q3 2024 | 176 | $2.27B |
| Q2 2024 | 155 | $2.12B |
| Q1 2024 | 143 | $2.14B |
| Q4 2023 | 125 | $1.93B |
| Q3 2023 | 127 | $1.40B |
| Q2 2023 | 124 | $1.53B |
| Q1 2023 | 117 | $1.45B |
| Q4 2022 | 119 | $1.01B |
| Q3 2022 | 121 | $1.27B |
| Q2 2022 | 115 | $921.8M |
| Q1 2022 | 108 | $1.20B |
| Q4 2021 | 93 | $1.52B |
| Q3 2021 | 4 | $16.4M |
| Q2 2021 | 1 | $20.8K |
| Q1 2021 | 0 | $0 |
Institutions, Q3 2025
Shares, value and share of portfolio for each institution holding Mirion Technologies, Inc.; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Silvercrest Asset Management Group LLC | 1,064,797 | $24.8M | 0.16% | −314,838−22.8% | Reduced |
| Victory Capital Management Inc | 1,082,626 | $25.2M | 0.02% | +123,952+12.9% | Added |
| Segall Bryant & Hamill, LLC | 1,116,098 | $26.0M | 0.35% | +26,881+2.5% | Added |
| Schroder Investment Management Group | 1,168,708 | $26.3M | 0.02% | +48,103+4.3% | Added |
| Emerald Advisers, LLC | 1,137,165 | $26.5M | 0.85% | +171,920+17.8% | Added |
| Select Equity Group, L.P. | 1,141,264 | $26.5M | 0.11% | −886,295−43.7% | Reduced |
| D. E. Shaw & Co., Inc. | 1,239,561 | $28.8M | 0.02% | +272,106+28.1% | Added |
| Morgan Stanley | 1,313,907 | $30.6M | 0.00% | −160,803−10.9% | Reduced |
| Conestoga Capital Advisors, LLC | 1,351,785 | $31.4M | 0.50% | +1,351,785 | New |
| Bank of New York Mellon Corp | 1,360,925 | $31.7M | 0.01% | +691,624+103.3% | Added |
| Principal Financial Group Inc | 1,401,252 | $32.6M | 0.02% | +1,285,894+1,114.7% | Added |
| Bank of America Corp | 1,419,752 | $33.0M | 0.00% | +36,539+2.6% | Added |
| Nuveen, LLC | 1,589,703 | $37.0M | 0.01% | +38,932+2.5% | Added |
| Chescapmanager LLC | 1,659,137 | $38.6M | 6.16% | +331,242+24.9% | Added |
| Ameriprise Financial Inc | 1,717,192 | $39.9M | 0.01% | +1,456,987+559.9% | Added |
| Raymond James Financial Inc | 1,731,206 | $40.3M | 0.01% | −241,330−12.2% | Reduced |
| Driehaus Capital Management LLC | 1,987,869 | $46.2M | 0.33% | −20,019−1.0% | Reduced |
| Arrowstreet Capital, Limited Partnership | 2,001,858 | $46.6M | 0.03% | −279,322−12.2% | Reduced |
| Charles Schwab Investment Management Inc | 2,234,627 | $52.0M | 0.01% | +550,650+32.7% | Added |
| Lord, Abbett & Co. LLC | 2,288,182 | $53.2M | 0.16% | −171,456−7.0% | Reduced |
| Royal Bank of Canada | 2,310,250 | $53.7M | 0.01% | +595,429+34.7% | Added |
| Northern Trust Corp | 2,349,786 | $54.7M | 0.01% | +416,930+21.6% | Added |
| Maverick Capital LtdSuperinvestorMaverick Capital | 2,588,579 | $60.2M | 0.81% | −2,719,459−51.2% | Reduced |
| Brown Advisory Inc | 2,721,783 | $63.3M | 0.08% | −2,678,622−49.6% | Reduced |
| Invesco Ltd. | 2,756,890 | $64.1M | 0.01% | +139,638+5.3% | Added |
| Loomis Sayles & Co L P | 2,761,535 | $64.2M | 0.08% | +1,169,847+73.5% | Added |
| Hood River Capital Management LLC | 2,763,284 | $64.3M | 0.76% | +1,293,011+87.9% | Added |
| Alyeska Investment Group, L.P. | 3,127,745 | $72.8M | 0.22% | −1,319,108−29.7% | Reduced |
| American Century Companies Inc | 3,229,538 | $75.1M | 0.04% | −143,814−4.3% | Reduced |
| Two Creeks Capital Management, LP | 3,598,763 | $83.7M | 6.02% | +3,598,763 | New |
| Swedbank AB | 4,005,200 | $93.2M | 0.09% | −120,835−2.9% | Reduced |
| UBS Group AG | 4,796,833 | $111.6M | 0.02% | +3,092,136+181.4% | Added |
| Goldman Sachs Group Inc | 5,054,592 | $117.6M | 0.02% | +4,416,331+691.9% | Added |
| Massachusetts Financial Services Co | 5,391,772 | $125.4M | 0.04% | +1,558,104+40.6% | Added |
| Geode Capital Management, LLC | 5,628,909 | $130.9M | 0.01% | +889,669+18.8% | Added |
| Dimensional Fund Advisors LP | 6,206,933 | $144.4M | 0.03% | −740,447−10.7% | Reduced |
| Janus Henderson Group PLC | 7,661,937 | $178.2M | 0.08% | −326,459−4.1% | Reduced |
| Cooperman Leon G | 8,383,441 | $195.0M | 6.09% | +1,258,441+17.7% | Added |
| State Street Corp | 8,816,346 | $205.1M | 0.01% | +3,722,274+73.1% | Added |
| FMR LLC | 9,078,301 | $211.2M | 0.01% | +8,131,306+858.6% | Added |
| T. Rowe Price Investment Management, Inc. | 21,566,642 | $501.6M | 0.31% | +609,122+2.9% | Added |
| Vanguard Group Inc | 30,418,327 | $707.5M | 0.01% | +6,651,735+28.0% | Added |
| BlackRock, Inc. | 36,430,491 | $847.4M | 0.01% | +19,417,850+114.1% | Added |
| ACK Asset Management LLC | 0 | $0 | 0.00% | −1,337,000−100.0% | Sold out |
| William Blair Investment Management, LLC | 0 | $0 | 0.00% | −1,005,847−100.0% | Sold out |
| TCW Group Inc | 0 | $0 | 0.00% | −731,465−100.0% | Sold out |
| Troluce Capital Advisors LLC | 0 | $0 | 0.00% | −600,000−100.0% | Sold out |
| Shannon River Fund Management LLC | 0 | $0 | 0.00% | −555,377−100.0% | Sold out |
| Qube Research & Technologies Ltd | 0 | $0 | 0.00% | −463,977−100.0% | Sold out |
| Moore Capital Management, LP | 0 | $0 | 0.00% | −407,413−100.0% | Sold out |
| Sona Asset Management (US) LLC | 0 | $0 | 0.00% | −314,000−100.0% | Sold out |
| Schonfeld Strategic Advisors LLC | 0 | $0 | 0.00% | −278,376−100.0% | Sold out |
| EAM Global Investors LLC | 0 | $0 | 0.00% | −236,179−100.0% | Sold out |
| Candelo Capital Management LP | 0 | $0 | 0.00% | −203,161−100.0% | Sold out |
| Arosa Capital Management LP | 0 | $0 | 0.00% | −180,273−100.0% | Sold out |
| Balyasny Asset Management LLC | 0 | $0 | 0.00% | −167,245−100.0% | Sold out |
| Roubaix Capital, LLC | 0 | $0 | 0.00% | −166,347−100.0% | Sold out |
| Jain Global LLC | 0 | $0 | 0.00% | −162,968−100.0% | Sold out |
| Neo Ivy Capital Management | 0 | $0 | 0.00% | −132,188−100.0% | Sold out |
| Renaissance Technologies LLC | 0 | $0 | 0.00% | −115,900−100.0% | Sold out |
| TT International Asset Management LTD | 0 | $0 | 0.00% | −105,551−100.0% | Sold out |
| Connor, Clark & Lunn Investment Management Ltd. | 0 | $0 | 0.00% | −102,225−100.0% | Sold out |
| Susquehanna Advisors Group, Inc. | 0 | $0 | 0.00% | −91,689−100.0% | Sold out |
| Aristeia Capital LLC | 0 | $0 | 0.00% | −86,002−100.0% | Sold out |
| Soros Fund Management LLCSuperinvestorSoros Fund Management | 0 | $0 | 0.00% | −71,700−100.0% | Sold out |
| Y-Intercept (Hong Kong) Ltd | 0 | $0 | 0.00% | −71,014−100.0% | Sold out |
| Weiss Asset Management LP | 0 | $0 | 0.00% | −66,910−100.0% | Sold out |
| Highbridge Capital Management LLC | 0 | $0 | 0.00% | −57,352−100.0% | Sold out |
| Steelhead Partners LLC | 0 | $0 | 0.00% | −57,352−100.0% | Sold out |
| HBK Investments L P | 0 | $0 | 0.00% | −42,998−100.0% | Sold out |
| Tenor Capital Management Co., L.P. | 0 | $0 | 0.00% | −42,998−100.0% | Sold out |
| Options Solutions, LLC | 0 | $0 | 0.00% | −38,191−100.0% | Sold out |
| Jefferies Financial Group Inc. | 0 | $0 | 0.00% | −30,000−100.0% | Sold out |
| CSS LLC | 0 | $0 | 0.00% | −28,070−100.0% | Sold out |
| Graham Capital Management, L.P. | 0 | $0 | 0.00% | −25,000−100.0% | Sold out |
| HSBC Holdings PLC | 0 | $0 | 0.00% | −20,426−100.0% | Sold out |
| Cookson Peirce & Co Inc | 0 | $0 | 0.00% | −20,000−100.0% | Sold out |
| Aigen Investment Management, LP | 0 | $0 | 0.00% | −18,596−100.0% | Sold out |
| Gotham Asset Management, LLC | 0 | $0 | 0.00% | −13,603−100.0% | Sold out |
| Baird Financial Group, Inc. | 0 | $0 | 0.00% | −12,559−100.0% | Sold out |
| Longboard Asset Management, LP | 0 | $0 | 0.00% | −11,594−100.0% | Sold out |
| Stifel Financial Corp | 0 | $0 | 0.00% | −10,466−100.0% | Sold out |
| Clear Street Markets LLC | 0 | $0 | 0.00% | −2,970−100.0% | Sold out |
| Skopos Labs, Inc. | 0 | $0 | 0.00% | −1,655−100.0% | Sold out |
| University of Texas/Texas Am Investment Managment Co | 0 | $0 | 0.00% | −952−100.0% | Sold out |
| Annis Gardner Whiting Capital Advisors, LLC | 0 | $0 | 0.00% | −546−100.0% | Sold out |
| Geneos Wealth Management Inc. | 0 | $0 | 0.00% | −149−100.0% | Sold out |
| Bryn Mawr Trust Co | 0 | $0 | 0.00% | −143−100.0% | Sold out |
| Mount Yale Investment Advisors, LLC | 0 | $0 | 0.00% | −100−100.0% | Sold out |
| UMA Financial Services, Inc. | 0 | $0 | 0.00% | −29−100.0% | Sold out |
| CIBC World Markets Corp | – | – | – | – | Not filed |
| First Horizon Advisors, Inc. | – | – | – | – | Not filed |
| Parkworth Wealth Management, Inc. | – | – | – | – | Not filed |