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, Q4 2025
Institutional positions in Mirion Technologies, Inc. as of Dec 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
- 365
- +26 vs. Q3 2025
- Shares held
- 252.2M
- −2.75M (−1.1%) vs. Q3 2025
- Total value
- $5.91B
- −$22.0M (−0.4%) vs. Q3 2025
- New holders
- 82
- 147 more added
- Sold out
- 56
- 94 more reduced
4 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 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, Q4 2025
Shares, value and share of portfolio for each institution holding Mirion Technologies, Inc.; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock, Inc. | 38,199,968 | $894.6M | 0.02% | +1,769,477+4.9% | Added |
| Vanguard Group Inc | 30,346,328 | $710.7M | 0.01% | −71,999−0.2% | Reduced |
| T. Rowe Price Investment Management, Inc. | 15,112,855 | $353.9M | 0.22% | −6,453,787−29.9% | Reduced |
| State Street Corp | 9,198,795 | $215.4M | 0.01% | +382,449+4.3% | Added |
| FMR LLC | 8,414,300 | $197.1M | 0.01% | −664,001−7.3% | Reduced |
| Cooperman Leon G | 8,383,441 | $196.3M | 6.51% | 00.0% | Unchanged |
| Geode Capital Management, LLC | 5,786,596 | $135.5M | 0.01% | +157,687+2.8% | Added |
| Goldman Sachs Group Inc | 5,248,506 | $122.9M | 0.02% | +193,914+3.8% | Added |
| UBS Group AG | 4,852,587 | $113.6M | 0.02% | +55,754+1.2% | Added |
| Janus Henderson Group PLC | 4,596,949 | $107.7M | 0.05% | −3,064,988−40.0% | Reduced |
| Dimensional Fund Advisors LP | 4,102,558 | $96.1M | 0.02% | −2,104,375−33.9% | Reduced |
| Massachusetts Financial Services Co | 3,663,479 | $85.8M | 0.03% | −1,728,293−32.1% | Reduced |
| Swedbank AB | 3,398,200 | $79.6M | 0.08% | −607,000−15.2% | Reduced |
| Invesco Ltd. | 3,101,120 | $72.6M | 0.01% | +344,230+12.5% | Added |
| Bank of New York Mellon Corp | 3,076,945 | $72.1M | 0.01% | +1,716,020+126.1% | Added |
| Two Creeks Capital Management, LP | 2,923,802 | $68.5M | 5.61% | −674,961−18.8% | Reduced |
| Loomis Sayles & Co L P | 2,845,619 | $66.6M | 0.08% | +84,084+3.0% | Added |
| Hood River Capital Management LLC | 2,780,137 | $65.1M | 0.71% | +16,853+0.6% | Added |
| American Century Companies Inc | 2,556,724 | $59.9M | 0.03% | −672,814−20.8% | Reduced |
| TCW Group Inc | 2,452,579 | $57.4M | 0.41% | +2,452,579 | New |
| Charles Schwab Investment Management Inc | 2,344,241 | $54.9M | 0.01% | +109,614+4.9% | Added |
| Ameriprise Financial Inc | 2,336,310 | $54.7M | 0.01% | +619,118+36.1% | Added |
| Northern Trust Corp | 2,331,446 | $54.6M | 0.01% | −18,340−0.8% | Reduced |
| Driehaus Capital Management LLC | 2,299,122 | $53.8M | 0.37% | +311,253+15.7% | Added |
| Royal Bank of Canada | 2,147,984 | $50.3M | 0.01% | −162,266−7.0% | Reduced |
| Lord, Abbett & Co. LLC | 2,143,558 | $50.2M | 0.15% | −144,624−6.3% | Reduced |
| Morgan Stanley | 2,096,858 | $49.1M | 0.00% | +782,951+59.6% | Added |
| Nuveen, LLC | 2,012,912 | $47.1M | 0.01% | +423,209+26.6% | Added |
| Artemis Investment Management LLP | 1,971,711 | $46.2M | 0.56% | +1,018,304+106.8% | Added |
| Conestoga Capital Advisors, LLC | 1,938,849 | $45.4M | 0.76% | +587,064+43.4% | Added |
| Franklin Resources Inc | 1,877,123 | $44.0M | 0.01% | +837,056+80.5% | Added |
| Principal Financial Group Inc | 1,707,659 | $40.0M | 0.02% | +306,407+21.9% | Added |
| JPMorgan Chase & Co | 1,670,064 | $39.1M | 0.00% | +1,431,724+600.7% | Added |
| Chescapmanager LLC | 1,659,137 | $38.9M | 6.41% | 00.0% | Unchanged |
| Citadel Advisors LLC | 1,620,793 | $38.0M | 0.03% | +1,430,949+753.7% | Added |
| Brown Advisory Inc | 1,613,051 | $37.8M | 0.05% | −1,108,732−40.7% | Reduced |
| Raymond James Financial Inc | 1,534,819 | $36.3M | 0.01% | −196,387−11.3% | Reduced |
| Alyeska Investment Group, L.P. | 1,531,217 | $35.9M | 0.10% | −1,596,528−51.0% | Reduced |
| Bank of America Corp | 1,358,870 | $31.8M | 0.00% | −60,882−4.3% | Reduced |
| Vaughan Nelson Investment Management, L.P. | 1,332,550 | $31.2M | 0.31% | +1,332,550 | New |
| Segall Bryant & Hamill, LLC | 1,169,689 | $27.4M | 0.37% | +53,591+4.8% | Added |
| Rockefeller Capital Management L.P. | 1,139,037 | $26.7M | 0.05% | +167,454+17.2% | Added |
| Emerald Advisers, LLC | 1,137,146 | $26.6M | 0.82% | −190.0% | Reduced |
| Arrowstreet Capital, Limited Partnership | 1,071,340 | $25.1M | 0.01% | −930,518−46.5% | Reduced |
| Allspring Global Investments Holdings, LLC | 1,030,230 | $24.6M | 0.04% | +462,643+81.5% | Added |
| Schroder Investment Management Group | 1,011,014 | $24.0M | 0.02% | −157,694−13.5% | Reduced |
| Jennison Associates LLC | 992,583 | $23.2M | 0.01% | −58,911−5.6% | Reduced |
| Corsair Capital Management, L.P. | 982,419 | $23.0M | 3.81% | −63,378−6.1% | Reduced |
| TimesSquare Capital Management, LLC | 967,261 | $22.7M | 0.34% | −46,078−4.5% | Reduced |
| Davidson Kempner Capital Management LP | 928,513 | $21.7M | 0.32% | +853,513+1,138.0% | Added |
| BNP Paribas Arbitrage, SA | 904,229 | $21.2M | 0.01% | +686,278+314.9% | Added |
| Voya Investment Management LLC | 879,850 | $20.6M | 0.02% | +837,354+1,970.4% | Added |
| Wells Fargo & Company | 870,256 | $20.4M | 0.00% | +524,329+151.6% | Added |
| Public Sector Pension Investment Board | 857,684 | $20.1M | 0.07% | −98,476−10.3% | Reduced |
| Nomura Asset Management International Inc. | 854,745 | $20.0M | 0.03% | +854,745 | New |
| Troluce Capital Advisors LLC | 850,000 | $19.9M | 14.70% | +850,000 | New |
| Federated Hermes, Inc. | 848,570 | $19.9M | 0.03% | +803,607+1,787.3% | Added |
| Price T Rowe Associates Inc | 834,330 | $19.5M | 0.00% | 00.0% | Unchanged |
| Silvercrest Asset Management Group LLC | 818,244 | $19.2M | 0.13% | −246,553−23.2% | Reduced |
| Stephens Investment Management Group LLC | 809,943 | $19.0M | 0.25% | +809,943 | New |
| Schwartz Investment Counsel Inc | 794,300 | $18.6M | 0.65% | −60,000−7.0% | Reduced |
| Select Equity Group, L.P. | 769,033 | $18.0M | 0.08% | −372,231−32.6% | Reduced |
| Nomura Holdings Inc | 760,733 | $17.8M | 0.05% | +33,771+4.6% | Added |
| Axiom Investors LLC | 721,496 | $16.9M | 0.15% | +149,206+26.1% | Added |
| Pier Capital, LLC | 717,392 | $16.8M | 2.68% | −77,434−9.7% | Reduced |
| ArrowMark Colorado Holdings LLC | 716,065 | $16.8M | 0.37% | −93,155−11.5% | Reduced |
| Emerald Mutual Fund Advisers Trust | 704,496 | $16.5M | 0.80% | 00.0% | Unchanged |
| Bamco Inc | 650,000 | $15.2M | 0.04% | +150,000+30.0% | Added |
| Ensign Peak Advisors, Inc | 649,769 | $15.2M | 0.03% | +55,463+9.3% | Added |
| Nicholas Investment Partners, LP | 641,660 | $15.0M | 1.09% | +56,187+9.6% | Added |
| D. E. Shaw & Co., Inc. | 629,175 | $14.7M | 0.01% | −610,386−49.2% | Reduced |
| Rhumbline Advisers | 619,284 | $14.5M | 0.01% | +10,450+1.7% | Added |
| Legal & General Group Plc | 609,891 | $14.3M | 0.00% | −6,639−1.1% | Reduced |
| Oberweis Asset Management Inc | 607,800 | $14.2M | 0.52% | +607,800 | New |
| Deutsche Bank AG | 578,409 | $13.5M | 0.00% | +389,495+206.2% | Added |
| Neuberger Berman Group LLC | 567,671 | $13.3M | 0.01% | +567,671 | New |
| Alta Park Capital, LP | 562,522 | $13.2M | 1.59% | −48,639−8.0% | Reduced |
| Gamco Investors, Inc. Et Al | 541,929 | $12.7M | 0.12% | +15,310+2.9% | Added |
| Telemark Asset Management, LLC | 500,000 | $11.7M | 1.17% | 00.0% | Unchanged |
| Summit Partners Public Asset Management, LLC | 500,000 | $11.7M | 0.33% | 00.0% | Unchanged |
| Bridgewater Associates, LP | 489,928 | $11.5M | 0.04% | +489,928 | New |
| Swiss National Bank | 464,200 | $10.9M | 0.01% | +48,700+11.7% | Added |
| SEI Investments Co | 456,512 | $10.7M | 0.01% | +108,813+31.3% | Added |
| UBS Asset Management Americas Inc | 443,832 | $10.4M | 0.00% | +53,272+13.6% | Added |
| Gabelli Funds LLC | 430,250 | $10.1M | 0.07% | −51,000−10.6% | Reduced |
| Victory Capital Management Inc | 405,891 | $9.51M | 0.01% | −676,735−62.5% | Reduced |
| Peregrine Capital Management LLC | 403,124 | $9.44M | 0.29% | −39,942−9.0% | Reduced |
| Toroso Investments, LLC | 403,036 | $9.44M | 0.04% | +382,259+1,839.8% | Added |
| Zacks Investment Management | 402,207 | $9.42M | 0.07% | −4,891−1.2% | Reduced |
| Sumitomo Mitsui DS Asset Management Company, Ltd | 399,543 | $9.36M | 0.07% | −18,247−4.4% | Reduced |
| Bank of Nova Scotia | 391,006 | $9.16M | 0.01% | +391,006 | New |
| Citigroup Inc | 377,914 | $8.85M | 0.01% | −102,458−21.3% | Reduced |
| Barclays PLC | 374,006 | $8.76M | 0.00% | −27,280−6.8% | Reduced |
| Burkehill Global Management, LP | 350,000 | $8.20M | 0.54% | 00.0% | Unchanged |
| Castleark Management LLC | 348,130 | $8.15M | 0.24% | +348,130 | New |
| First Trust Advisors LP | 348,104 | $8.15M | 0.01% | +78,903+29.3% | Added |
| TD Asset Management Inc | 348,074 | $8.15M | 0.01% | −138,870−28.5% | Reduced |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 325,766 | $7.63M | 0.01% | +49,822+18.1% | Added |
| Ardsley Advisory Partners LP | 325,000 | $7.61M | 0.97% | −3,220−1.0% | Reduced |
| Alliancebernstein L.P. | 320,499 | $7.51M | 0.00% | −47,916−13.0% | Reduced |