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 |
|---|---|---|---|---|---|
| BlackRock, Inc. | 36,430,491 | $847.4M | 0.01% | +19,417,850+114.1% | Added |
| Vanguard Group Inc | 30,418,327 | $707.5M | 0.01% | +6,651,735+28.0% | Added |
| T. Rowe Price Investment Management, Inc. | 21,566,642 | $501.6M | 0.31% | +609,122+2.9% | Added |
| FMR LLC | 9,078,301 | $211.2M | 0.01% | +8,131,306+858.6% | Added |
| State Street Corp | 8,816,346 | $205.1M | 0.01% | +3,722,274+73.1% | Added |
| Cooperman Leon G | 8,383,441 | $195.0M | 6.09% | +1,258,441+17.7% | Added |
| Janus Henderson Group PLC | 7,661,937 | $178.2M | 0.08% | −326,459−4.1% | Reduced |
| Dimensional Fund Advisors LP | 6,206,933 | $144.4M | 0.03% | −740,447−10.7% | Reduced |
| Geode Capital Management, LLC | 5,628,909 | $130.9M | 0.01% | +889,669+18.8% | Added |
| Massachusetts Financial Services Co | 5,391,772 | $125.4M | 0.04% | +1,558,104+40.6% | Added |
| Goldman Sachs Group Inc | 5,054,592 | $117.6M | 0.02% | +4,416,331+691.9% | Added |
| UBS Group AG | 4,796,833 | $111.6M | 0.02% | +3,092,136+181.4% | Added |
| Swedbank AB | 4,005,200 | $93.2M | 0.09% | −120,835−2.9% | Reduced |
| Two Creeks Capital Management, LP | 3,598,763 | $83.7M | 6.02% | +3,598,763 | New |
| American Century Companies Inc | 3,229,538 | $75.1M | 0.04% | −143,814−4.3% | Reduced |
| Alyeska Investment Group, L.P. | 3,127,745 | $72.8M | 0.22% | −1,319,108−29.7% | Reduced |
| Hood River Capital Management LLC | 2,763,284 | $64.3M | 0.76% | +1,293,011+87.9% | Added |
| Loomis Sayles & Co L P | 2,761,535 | $64.2M | 0.08% | +1,169,847+73.5% | Added |
| Invesco Ltd. | 2,756,890 | $64.1M | 0.01% | +139,638+5.3% | Added |
| Brown Advisory Inc | 2,721,783 | $63.3M | 0.08% | −2,678,622−49.6% | Reduced |
| Maverick Capital LtdSuperinvestorMaverick Capital | 2,588,579 | $60.2M | 0.81% | −2,719,459−51.2% | Reduced |
| Northern Trust Corp | 2,349,786 | $54.7M | 0.01% | +416,930+21.6% | Added |
| Royal Bank of Canada | 2,310,250 | $53.7M | 0.01% | +595,429+34.7% | Added |
| Lord, Abbett & Co. LLC | 2,288,182 | $53.2M | 0.16% | −171,456−7.0% | Reduced |
| Charles Schwab Investment Management Inc | 2,234,627 | $52.0M | 0.01% | +550,650+32.7% | Added |
| Arrowstreet Capital, Limited Partnership | 2,001,858 | $46.6M | 0.03% | −279,322−12.2% | Reduced |
| Driehaus Capital Management LLC | 1,987,869 | $46.2M | 0.33% | −20,019−1.0% | Reduced |
| Raymond James Financial Inc | 1,731,206 | $40.3M | 0.01% | −241,330−12.2% | Reduced |
| Ameriprise Financial Inc | 1,717,192 | $39.9M | 0.01% | +1,456,987+559.9% | Added |
| Chescapmanager LLC | 1,659,137 | $38.6M | 6.16% | +331,242+24.9% | Added |
| Nuveen, LLC | 1,589,703 | $37.0M | 0.01% | +38,932+2.5% | Added |
| Bank of America Corp | 1,419,752 | $33.0M | 0.00% | +36,539+2.6% | Added |
| Principal Financial Group Inc | 1,401,252 | $32.6M | 0.02% | +1,285,894+1,114.7% | Added |
| Bank of New York Mellon Corp | 1,360,925 | $31.7M | 0.01% | +691,624+103.3% | Added |
| Conestoga Capital Advisors, LLC | 1,351,785 | $31.4M | 0.50% | +1,351,785 | New |
| Morgan Stanley | 1,313,907 | $30.6M | 0.00% | −160,803−10.9% | Reduced |
| D. E. Shaw & Co., Inc. | 1,239,561 | $28.8M | 0.02% | +272,106+28.1% | Added |
| Select Equity Group, L.P. | 1,141,264 | $26.5M | 0.11% | −886,295−43.7% | Reduced |
| Emerald Advisers, LLC | 1,137,165 | $26.5M | 0.85% | +171,920+17.8% | Added |
| Schroder Investment Management Group | 1,168,708 | $26.3M | 0.02% | +48,103+4.3% | Added |
| Segall Bryant & Hamill, LLC | 1,116,098 | $26.0M | 0.35% | +26,881+2.5% | Added |
| Victory Capital Management Inc | 1,082,626 | $25.2M | 0.02% | +123,952+12.9% | Added |
| Silvercrest Asset Management Group LLC | 1,064,797 | $24.8M | 0.16% | −314,838−22.8% | Reduced |
| Jennison Associates LLC | 1,051,494 | $24.5M | 0.01% | −20,595−1.9% | Reduced |
| Corsair Capital Management, L.P. | 1,045,797 | $24.3M | 4.32% | −1,979,615−65.4% | Reduced |
| Franklin Resources Inc | 1,040,067 | $24.2M | 0.01% | +371,908+55.7% | Added |
| TimesSquare Capital Management, LLC | 1,013,339 | $23.6M | 0.34% | +1,013,339 | New |
| Rockefeller Capital Management L.P. | 971,583 | $22.6M | 0.04% | −90,775−8.5% | Reduced |
| Public Sector Pension Investment Board | 956,160 | $22.2M | 0.08% | +956,160 | New |
| Artemis Investment Management LLP | 953,407 | $22.2M | 0.28% | −2,075,561−68.5% | Reduced |
| Keystone Investors Pte Ltd | 881,593 | $20.5M | 2.37% | +881,593 | New |
| Schwartz Investment Counsel Inc | 854,300 | $19.9M | 0.67% | −100,000−10.5% | Reduced |
| Price T Rowe Associates Inc | 834,330 | $19.4M | 0.00% | +665,185+393.3% | Added |
| ArrowMark Colorado Holdings LLC | 809,220 | $18.8M | 0.35% | −868,292−51.8% | Reduced |
| Pier Capital, LLC | 794,826 | $18.5M | 2.89% | −76,202−8.7% | Reduced |
| Ghisallo Capital Management LLC | 774,900 | $18.0M | 0.59% | +774,900 | New |
| Nomura Holdings Inc | 726,962 | $16.9M | 0.08% | +585,016+412.1% | Added |
| Emerald Mutual Fund Advisers Trust | 704,496 | $16.4M | 0.85% | +150,872+27.3% | Added |
| Legal & General Group Plc | 616,530 | $14.3M | 0.00% | +373,706+153.9% | Added |
| Alta Park Capital, LP | 611,161 | $14.2M | 1.43% | +611,161 | New |
| Rhumbline Advisers | 608,834 | $14.2M | 0.01% | +290,232+91.1% | Added |
| Ensign Peak Advisors, Inc | 594,306 | $13.8M | 0.02% | −6,942−1.2% | Reduced |
| Nicholas Investment Partners, LP | 585,473 | $13.6M | 1.04% | +125,609+27.3% | Added |
| Axiom Investors LLC | 572,290 | $13.3M | 0.10% | +179,605+45.7% | Added |
| Allspring Global Investments Holdings, LLC | 567,587 | $13.1M | 0.02% | +11,225+2.0% | Added |
| FIL Ltd | 560,893 | $13.0M | 0.01% | 00.0% | Unchanged |
| Gamco Investors, Inc. Et Al | 526,619 | $12.2M | 0.12% | −35,455−6.3% | Reduced |
| Yaupon Capital Management LP | 525,000 | $12.2M | 0.63% | +525,000 | New |
| Millennium Management LLC | 521,021 | $12.1M | 0.01% | −2,360,926−81.9% | Reduced |
| Bornite Capital Management LP | 500,000 | $11.6M | 1.08% | −1,551,700−75.6% | Reduced |
| Summit Partners Public Asset Management, LLC | 500,000 | $11.6M | 0.38% | −546,000−52.2% | Reduced |
| Telemark Asset Management, LLC | 500,000 | $11.6M | 1.10% | 00.0% | Unchanged |
| Bamco Inc | 500,000 | $11.6M | 0.03% | +500,000 | New |
| Sculptor Capital LP | 500,000 | $11.6M | 0.16% | +500,000 | New |
| TD Asset Management Inc | 486,944 | $11.3M | 0.01% | +56,186+13.0% | Added |
| Gabelli Funds LLC | 481,250 | $11.2M | 0.08% | −30,064−5.9% | Reduced |
| Citigroup Inc | 480,372 | $11.2M | 0.01% | +223,271+86.8% | Added |
| Walleye Capital LLC | 454,552 | $10.6M | 0.09% | +372,555+454.4% | Added |
| Peregrine Capital Management LLC | 443,066 | $10.3M | 0.31% | +443,066 | New |
| Sumitomo Mitsui DS Asset Management Company, Ltd | 417,790 | $9.72M | 0.08% | +181,450+76.8% | Added |
| Swiss National Bank | 415,500 | $9.66M | 0.01% | +6,700+1.6% | Added |
| Zacks Investment Management | 407,098 | $9.47M | 0.08% | +27,637+7.3% | Added |
| Barclays PLC | 401,286 | $9.33M | 0.00% | −10,223−2.5% | Reduced |
| UBS Asset Management Americas Inc | 390,560 | $9.08M | 0.00% | −699,739−64.2% | Reduced |
| Susquehanna International Group, LLP | 388,894 | $9.05M | 0.01% | −174,931−31.0% | Reduced |
| Aperture Investors, LLC | 380,095 | $8.84M | 1.23% | +35,095+10.2% | Added |
| Kingdon Capital Management, L.L.C. | 375,000 | $8.72M | 1.37% | −50,000−11.8% | Reduced |
| Alliancebernstein L.P. | 368,415 | $8.57M | 0.00% | +138,953+60.6% | Added |
| Burkehill Global Management, LP | 350,000 | $8.14M | 0.46% | +350,000 | New |
| SEI Investments Co | 347,699 | $8.09M | 0.01% | −3,340−1.0% | Reduced |
| Wells Fargo & Company | 345,927 | $8.05M | 0.00% | +46,270+15.4% | Added |
| Pinnbrook Capital Management LP | 335,070 | $7.79M | 1.44% | +335,070 | New |
| Ardsley Advisory Partners LP | 328,220 | $7.63M | 1.17% | −135,000−29.1% | Reduced |
| Great West Life Assurance Co | 324,608 | $7.31M | 0.01% | +324,608 | New |
| Essex Investment Management Co LLC | 310,500 | $7.22M | 1.11% | +10,684+3.6% | Added |
| Fortress Investment Group LLC | 302,431 | $7.03M | 0.94% | +300,925+19,981.7% | Added |
| Lazard Asset Management LLC | 299,956 | $6.98M | 0.01% | +81,925+37.6% | Added |
| Two Sigma Investments, LP | 298,500 | $6.94M | 0.01% | +269,850+941.9% | Added |
| AQR Capital Management LLC | 292,338 | $6.80M | 0.00% | −19,922−6.4% | Reduced |
| Empowered Funds, LLC | 291,064 | $6.77M | 0.07% | +291,064 | New |