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, Q1 2025
Institutional positions in Mirion Technologies, Inc. as of Mar 31, 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
- 230
- +8 vs. Q4 2024
- Shares held
- 185.4M
- −1.13M (−0.6%) vs. Q4 2024
- Total value
- $2.69B
- −$565.0M (−17.4%) vs. Q4 2024
- New holders
- 47
- 93 more added
- Sold out
- 39
- 66 more reduced
2 institutions that held it in Q4 2024 haven't filed for Q1 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2024: 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, Q1 2025
Shares, value and share of portfolio for each institution holding Mirion Technologies, Inc.; share changes are against Q4 2024.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Vanguard Group Inc | 23,258,048 | $337.2M | 0.01% | −651,754−2.7% | Reduced |
| T. Rowe Price Investment Management, Inc. | 20,710,389 | $300.3M | 0.20% | +322,243+1.6% | Added |
| BlackRock, Inc. | 16,139,924 | $234.0M | 0.00% | +37,863+0.2% | Added |
| Janus Henderson Group PLC | 8,587,664 | $125.6M | 0.07% | +257,169+3.1% | Added |
| Maverick Capital LtdSuperinvestorMaverick Capital | 8,056,109 | $116.8M | 2.10% | +1,878,498+30.4% | Added |
| Dimensional Fund Advisors LP | 7,363,954 | $106.8M | 0.03% | +178,260+2.5% | Added |
| Cooperman Leon G | 7,025,000 | $101.9M | 4.04% | 00.0% | Unchanged |
| Brown Advisory Inc | 5,560,461 | $80.6M | 0.12% | +1,748,437+45.9% | Added |
| State Street Corp | 5,139,569 | $74.5M | 0.00% | −61,523−1.2% | Reduced |
| Geode Capital Management, LLC | 4,738,769 | $68.7M | 0.01% | +166,941+3.7% | Added |
| Alyeska Investment Group, L.P. | 4,150,262 | $60.2M | 0.24% | +388,947+10.3% | Added |
| American Century Companies Inc | 3,432,814 | $49.8M | 0.03% | +1,047,781+43.9% | Added |
| Corsair Capital Management, L.P. | 3,072,003 | $44.5M | 11.47% | −97,617−3.1% | Reduced |
| Artemis Investment Management LLP | 2,998,435 | $43.5M | 0.67% | +811,882+37.1% | Added |
| Arrowstreet Capital, Limited Partnership | 2,789,509 | $40.4M | 0.03% | −1,425,412−33.8% | Reduced |
| Millennium Management LLC | 2,567,660 | $37.2M | 0.04% | −537,714−17.3% | Reduced |
| Lord, Abbett & Co. LLC | 2,399,864 | $34.8M | 0.12% | +31,130+1.3% | Added |
| Select Equity Group, L.P. | 2,292,236 | $33.2M | 0.15% | −21,183−0.9% | Reduced |
| ArrowMark Colorado Holdings LLC | 2,188,926 | $31.7M | 0.51% | −179,624−7.6% | Reduced |
| Bornite Capital Management LP | 2,064,300 | $29.9M | 7.71% | −52,700−2.5% | Reduced |
| Northern Trust Corp | 1,971,182 | $28.6M | 0.00% | −70,407−3.4% | Reduced |
| William Blair Investment Management, LLC | 1,731,391 | $25.1M | 0.07% | −1,309,625−43.1% | Reduced |
| Raymond James Financial Inc | 1,717,848 | $24.9M | 0.01% | +734,238+74.6% | Added |
| Charles Schwab Investment Management Inc | 1,641,075 | $23.8M | 0.00% | +41,864+2.6% | Added |
| ACK Asset Management LLC | 1,618,356 | $23.5M | 3.85% | −196,644−10.8% | Reduced |
| UBS Group AG | 1,497,206 | $21.7M | 0.00% | −49,275−3.2% | Reduced |
| Nuveen, LLC | 1,388,424 | $20.1M | 0.01% | +1,388,424 | New |
| Chescapmanager LLC | 1,327,895 | $19.3M | 4.01% | 00.0% | Unchanged |
| Silvercrest Asset Management Group LLC | 1,310,960 | $19.0M | 0.14% | +342,399+35.4% | Added |
| Morgan Stanley | 1,222,077 | $17.7M | 0.00% | +173,257+16.5% | Added |
| Schroder Investment Management Group | 1,122,671 | $16.4M | 0.02% | +447,587+66.3% | Added |
| Victory Capital Management Inc | 1,004,697 | $14.6M | 0.01% | +977,221+3,556.6% | Added |
| Masters Capital Management LLC | 1,000,000 | $14.5M | 3.07% | 00.0% | Unchanged |
| Schwartz Investment Counsel Inc | 954,300 | $13.8M | 0.48% | −395,000−29.3% | Reduced |
| Pier Capital, LLC | 941,480 | $13.7M | 2.29% | +283,523+43.1% | Added |
| Rockefeller Capital Management L.P. | 938,237 | $13.6M | 0.03% | +938,237 | New |
| Jennison Associates LLC | 931,867 | $13.5M | 0.01% | +417,553+81.2% | Added |
| Citadel Advisors LLC | 909,252 | $13.2M | 0.01% | +798,015+717.4% | Added |
| Summit Partners Public Asset Management, LLC | 896,000 | $13.0M | 0.62% | +896,000 | New |
| Emerald Advisers, LLC | 880,089 | $12.8M | 0.57% | +272,098+44.8% | Added |
| Arosa Capital Management LP | 868,261 | $12.6M | 8.35% | +375,261+76.1% | Added |
| FIL Ltd | 810,893 | $11.8M | 0.01% | −1,200,000−59.7% | Reduced |
| Segall Bryant & Hamill, LLC | 711,349 | $10.3M | 0.16% | +236,766+49.9% | Added |
| Bank of New York Mellon Corp | 669,138 | $9.70M | 0.00% | +7,709+1.2% | Added |
| Royce & Associates LP | 668,643 | $9.70M | 0.11% | +215,643+47.6% | Added |
| Qube Research & Technologies Ltd | 650,207 | $9.43M | 0.01% | +174,088+36.6% | Added |
| Renaissance Technologies LLC | 643,700 | $9.33M | 0.01% | +498,686+343.9% | Added |
| Norges Bank | 602,500 | $8.74M | 0.00% | +602,500 | New |
| Gamco Investors, Inc. Et Al | 592,127 | $8.59M | 0.09% | −7,507−1.3% | Reduced |
| Allspring Global Investments Holdings, LLC | 596,100 | $8.55M | 0.01% | +75,408+14.5% | Added |
| Bank of America Corp | 588,622 | $8.54M | 0.00% | +386,892+191.8% | Added |
| Goldman Sachs Group Inc | 579,644 | $8.40M | 0.00% | −8,295,814−93.5% | Reduced |
| Trexquant Investment LP | 567,609 | $8.23M | 0.10% | +114,065+25.1% | Added |
| Gabelli Funds LLC | 524,250 | $7.60M | 0.06% | −32,438−5.8% | Reduced |
| Emerald Mutual Fund Advisers Trust | 507,116 | $7.35M | 0.52% | +280,437+123.7% | Added |
| Telemark Asset Management, LLC | 500,000 | $7.25M | 0.95% | 00.0% | Unchanged |
| Ensign Peak Advisors, Inc | 496,147 | $7.19M | 0.01% | +23,926+5.1% | Added |
| D. E. Shaw & Co., Inc. | 451,617 | $6.55M | 0.01% | +132,073+41.3% | Added |
| Kingdon Capital Management, L.L.C. | 450,000 | $6.53M | 1.35% | +50,000+12.5% | Added |
| UBS Asset Management Americas Inc | 434,583 | $6.30M | 0.00% | +34,973+8.8% | Added |
| Tudor Investment Corp Et Al | 430,949 | $6.25M | 0.06% | +265,083+159.8% | Added |
| TD Asset Management Inc | 415,034 | $6.02M | 0.01% | +7,902+1.9% | Added |
| Swiss National Bank | 393,200 | $5.70M | 0.00% | +16,400+4.4% | Added |
| Roubaix Capital, LLC | 379,098 | $5.50M | 2.86% | +242,458+177.4% | Added |
| Nicholas Investment Partners, LP | 367,256 | $5.33M | 0.55% | −64,098−14.9% | Reduced |
| Aperture Investors, LLC | 357,367 | $5.18M | 0.79% | −14,203−3.8% | Reduced |
| Bastion Asset Management Inc. | 326,580 | $4.89M | 2.63% | +326,580 | New |
| Susquehanna International Group, LLP | 334,696 | $4.85M | 0.01% | +244,871+272.6% | Added |
| Jane Street Group, LLC | 328,184 | $4.76M | 0.01% | +307,505+1,487.0% | Added |
| Invesco Ltd. | 321,838 | $4.67M | 0.00% | −168,976−34.4% | Reduced |
| FMR LLC | 321,791 | $4.67M | 0.00% | +19,502+6.5% | Added |
| First Trust Advisors LP | 317,407 | $4.60M | 0.00% | +208,150+190.5% | Added |
| Rhumbline Advisers | 307,422 | $4.46M | 0.00% | −11,045−3.5% | Reduced |
| Essex Investment Management Co LLC | 301,873 | $4.38M | 0.91% | −2,382−0.8% | Reduced |
| Wells Fargo & Company | 291,129 | $4.22M | 0.00% | −3,669−1.2% | Reduced |
| JPMorgan Chase & Co | 287,369 | $4.17M | 0.00% | −310,679−51.9% | Reduced |
| Walleye Capital LLC | 286,320 | $4.15M | 0.05% | +183,169+177.6% | Added |
| Rice Hall James & Associates, LLC | 270,106 | $3.92M | 0.23% | −419−0.2% | Reduced |
| Deutsche Bank AG | 261,177 | $3.79M | 0.00% | −50,269−16.1% | Reduced |
| Hollow Brook Wealth Management LLC | 256,742 | $3.72M | 1.10% | +46,361+22.0% | Added |
| Barclays PLC | 253,540 | $3.68M | 0.00% | −99,782−28.2% | Reduced |
| Schonfeld Strategic Advisors LLC | 248,969 | $3.61M | 0.02% | −3,717−1.5% | Reduced |
| Legal & General Group Plc | 233,729 | $3.39M | 0.00% | +14,031+6.4% | Added |
| Alliancebernstein L.P. | 219,330 | $3.18M | 0.00% | +2,831+1.3% | Added |
| Verition Fund Management LLC | 201,406 | $2.92M | 0.02% | −48,642−19.5% | Reduced |
| AQR Capital Management LLC | 199,211 | $2.89M | 0.00% | +110,399+124.3% | Added |
| SEI Investments Co | 193,739 | $2.81M | 0.00% | +5,821+3.1% | Added |
| Lazard Asset Management LLC | 191,755 | $2.78M | 0.00% | −87,062−31.2% | Reduced |
| Sandler Capital Management | 181,787 | $2.64M | 0.86% | −390,664−68.2% | Reduced |
| Alberta Investment Management Corp | 180,520 | $2.62M | 0.02% | +26,360+17.1% | Added |
| Envestnet Asset Management Inc | 177,968 | $2.58M | 0.00% | +158,582+818.0% | Added |
| California State Teachers Retirement System | 177,403 | $2.57M | 0.00% | −2,844−1.6% | Reduced |
| Ardsley Advisory Partners LP | 175,000 | $2.54M | 0.59% | +50,000+40.0% | Added |
| Citigroup Inc | 165,865 | $2.41M | 0.00% | −21,458−11.5% | Reduced |
| Balyasny Asset Management LLC | 164,032 | $2.38M | 0.01% | +127,530+349.4% | Added |
| Dark Forest Capital Management LP | 151,996 | $2.20M | 0.10% | +151,996 | New |
| Price T Rowe Associates Inc | 150,130 | $2.18M | 0.00% | +9,854+7.0% | Added |
| HRT Financial LP | 145,133 | $2.10M | 0.01% | −10,266−6.6% | Reduced |
| Legato Capital Management LLC | 136,125 | $1.97M | 0.27% | −9,345−6.4% | Reduced |
| Exchange Traded Concepts, LLC | 134,005 | $1.94M | 0.03% | +45,175+50.9% | Added |