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 2026
Institutional positions in Mirion Technologies, Inc. as of Mar 31, 2026. 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
- 362
- +5 vs. Q4 2025
- Shares held
- 253.5M
- +32.3M (+14.6%) vs. Q4 2025
- Total value
- $4.71B
- −$467.0M (−9.0%) vs. Q4 2025
- New holders
- 62
- 136 more added
- Sold out
- 57
- 131 more reduced
8 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 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, Q1 2026
Shares, value and share of portfolio for each institution holding Mirion Technologies, Inc.; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock, Inc. | 37,857,697 | $703.8M | 0.01% | −342,271−0.9% | Reduced |
| Vanguard Portfolio Management LLC | 17,905,722 | $332.9M | 0.02% | +17,905,722 | New |
| T. Rowe Price Investment Management, Inc. | 14,627,795 | $271.9M | 0.19% | −485,060−3.2% | Reduced |
| Vanguard Capital Management LLC | 10,505,195 | $195.3M | 0.00% | +10,505,195 | New |
| State Street Corp | 9,430,017 | $175.3M | 0.01% | +231,222+2.5% | Added |
| Cooperman Leon G | 8,383,441 | $155.8M | 5.11% | 00.0% | Unchanged |
| Goldman Sachs Group Inc | 7,349,668 | $136.6M | 0.02% | +2,101,162+40.0% | Added |
| FMR LLC | 6,551,692 | $121.8M | 0.01% | −1,862,608−22.1% | Reduced |
| Geode Capital Management, LLC | 5,940,175 | $110.4M | 0.01% | +153,579+2.7% | Added |
| Millennium Management LLC | 5,106,801 | $94.9M | 0.07% | +5,106,801 | New |
| Dimensional Fund Advisors LP | 4,694,288 | $87.2M | 0.02% | +591,730+14.4% | Added |
| Bank of New York Mellon Corp | 4,536,732 | $84.3M | 0.02% | +1,459,787+47.4% | Added |
| Janus Henderson Group PLC | 4,043,089 | $75.2M | 0.04% | −553,860−12.0% | Reduced |
| UBS Group AG | 3,766,842 | $70.0M | 0.01% | −1,085,745−22.4% | Reduced |
| Swedbank AB | 3,159,950 | $58.7M | 0.06% | −238,250−7.0% | Reduced |
| American Century Companies Inc | 2,732,762 | $50.8M | 0.03% | +176,038+6.9% | Added |
| Alyeska Investment Group, L.P. | 2,701,580 | $50.2M | 0.14% | +1,170,363+76.4% | Added |
| Loomis Sayles & Co L P | 2,670,228 | $49.6M | 0.07% | −175,391−6.2% | Reduced |
| Maverick Capital LtdSuperinvestorMaverick Capital | 2,649,879 | $49.3M | 0.57% | +2,649,879 | New |
| Two Creeks Capital Management, LP | 2,449,059 | $45.5M | 4.81% | −474,743−16.2% | Reduced |
| JPMorgan Chase & Co | 2,619,120 | $45.4M | 0.00% | +949,056+56.8% | Added |
| Northern Trust Corp | 2,366,237 | $44.0M | 0.01% | +34,791+1.5% | Added |
| Invesco Ltd. | 2,294,250 | $42.7M | 0.00% | −806,870−26.0% | Reduced |
| Morgan Stanley | 2,285,068 | $42.5M | 0.00% | +188,210+9.0% | Added |
| Charles Schwab Investment Management Inc | 2,277,245 | $42.3M | 0.01% | −66,996−2.9% | Reduced |
| TCW Group Inc | 2,238,426 | $41.6M | 0.31% | −214,153−8.7% | Reduced |
| Alliancebernstein L.P. | 1,653,429 | $38.7M | 0.01% | +1,332,930+415.9% | Added |
| Franklin Resources Inc | 1,996,144 | $37.1M | 0.01% | +119,021+6.3% | Added |
| Royal Bank of Canada | 1,961,404 | $36.5M | 0.01% | −186,580−8.7% | Reduced |
| Nuveen, LLC | 1,949,992 | $36.3M | 0.01% | −62,920−3.1% | Reduced |
| Conestoga Capital Advisors, LLC | 1,831,019 | $34.0M | 0.68% | −107,830−5.6% | Reduced |
| Citadel Advisors LLC | 1,823,252 | $33.9M | 0.02% | +202,459+12.5% | Added |
| Vanguard Fiduciary Trust Co | 1,694,538 | $31.5M | 0.01% | +1,694,538 | New |
| Chescapmanager LLC | 1,659,137 | $30.8M | 4.93% | 00.0% | Unchanged |
| Massachusetts Financial Services Co | 1,589,259 | $29.5M | 0.01% | −2,074,220−56.6% | Reduced |
| Troluce Capital Advisors LLC | 1,500,000 | $27.9M | 2.95% | +650,000+76.5% | Added |
| Rockefeller Capital Management L.P. | 1,392,724 | $25.9M | 0.05% | +253,687+22.3% | Added |
| Emerald Advisers, LLC | 1,381,574 | $25.7M | 0.81% | +244,428+21.5% | Added |
| Stephens Investment Management Group LLC | 1,374,876 | $25.6M | 0.35% | +564,933+69.7% | Added |
| Bank of America Corp | 1,355,298 | $25.2M | 0.00% | −3,572−0.3% | Reduced |
| Davidson Kempner Capital Management LP | 1,314,819 | $24.4M | 0.43% | +386,306+41.6% | Added |
| Brown Advisory Inc | 1,300,073 | $24.2M | 0.04% | −312,978−19.4% | Reduced |
| TimesSquare Capital Management, LLC | 1,294,165 | $24.1M | 0.41% | +326,904+33.8% | Added |
| Ameriprise Financial Inc | 1,289,690 | $24.0M | 0.01% | −1,046,620−44.8% | Reduced |
| Daiwa Securities Group Inc. | 1,217,497 | $22.6M | 0.07% | +1,170,497+2,490.4% | Added |
| Bamco Inc | 1,213,748 | $22.6M | 0.07% | +563,748+86.7% | Added |
| Principal Financial Group Inc | 1,196,049 | $22.2M | 0.01% | −511,610−30.0% | Reduced |
| Voya Investment Management LLC | 1,168,228 | $21.7M | 0.02% | +288,378+32.8% | Added |
| Congress Asset Management Co | 1,114,061 | $20.7M | 0.15% | +1,114,061 | New |
| Segall Bryant & Hamill, LLC | 1,111,874 | $20.7M | 0.30% | −57,815−4.9% | Reduced |
| BNP Paribas Arbitrage, SA | 1,111,397 | $20.7M | 0.01% | +207,168+22.9% | Added |
| Allspring Global Investments Holdings, LLC | 1,059,030 | $19.8M | 0.03% | +28,800+2.8% | Added |
| Schroder Investment Management Group | 1,136,000 | $19.7M | 0.02% | +124,986+12.4% | Added |
| Select Equity Group, L.P. | 1,055,468 | $19.6M | 0.10% | +286,435+37.2% | Added |
| Citigroup Inc | 1,048,104 | $19.5M | 0.01% | +670,190+177.3% | Added |
| Raymond James Financial Inc | 1,075,652 | $18.9M | 0.01% | −459,167−29.9% | Reduced |
| Corsair Capital Management, L.P. | 982,419 | $18.3M | 2.72% | 00.0% | Unchanged |
| Alta Park Capital, LP | 977,138 | $18.2M | 2.92% | +414,616+73.7% | Added |
| Jennison Associates LLC | 942,696 | $17.5M | 0.01% | −49,887−5.0% | Reduced |
| Lord, Abbett & Co. LLC | 937,044 | $17.4M | 0.06% | −1,206,514−56.3% | Reduced |
| Fred Alger Management, LLC | 909,606 | $16.9M | 0.07% | +909,606 | New |
| Public Sector Pension Investment Board | 875,290 | $16.3M | 0.05% | +17,606+2.1% | Added |
| Emerald Mutual Fund Advisers Trust | 873,466 | $16.2M | 0.79% | +168,970+24.0% | Added |
| Neuberger Berman Group LLC | 856,389 | $15.9M | 0.01% | +288,718+50.9% | Added |
| Schwartz Investment Counsel Inc | 854,300 | $15.9M | 0.56% | +60,000+7.6% | Added |
| Wellington Management Group LLP | 837,812 | $15.6M | 0.00% | +589,037+236.8% | Added |
| Federated Hermes, Inc. | 816,447 | $15.2M | 0.02% | −32,123−3.8% | Reduced |
| Toroso Investments, LLC | 775,013 | $14.4M | 0.04% | +371,977+92.3% | Added |
| Nomura Holdings Inc | 764,560 | $14.2M | 0.12% | +3,827+0.5% | Added |
| Oberweis Asset Management Inc | 744,267 | $13.8M | 0.41% | +136,467+22.5% | Added |
| Nomura Asset Management International Inc. | 727,278 | $13.5M | 0.02% | −127,467−14.9% | Reduced |
| Pier Capital, LLC | 703,811 | $13.1M | 2.16% | −13,581−1.9% | Reduced |
| Silvercrest Asset Management Group LLC | 680,355 | $12.6M | 0.09% | −137,889−16.9% | Reduced |
| Wells Fargo & Company | 678,437 | $12.6M | 0.00% | −191,819−22.0% | Reduced |
| Rhumbline Advisers | 634,415 | $11.8M | 0.01% | +15,131+2.4% | Added |
| Ensign Peak Advisors, Inc | 631,418 | $11.7M | 0.02% | −18,351−2.8% | Reduced |
| Deutsche Bank AG | 613,048 | $11.4M | 0.00% | +34,639+6.0% | Added |
| ArrowMark Colorado Holdings LLC | 575,155 | $10.7M | 0.28% | −140,910−19.7% | Reduced |
| Legal & General Group Plc | 555,910 | $10.3M | 0.00% | −53,981−8.9% | Reduced |
| Gamco Investors, Inc. Et Al | 544,662 | $10.1M | 0.10% | +2,733+0.5% | Added |
| Artemis Investment Management LLP | 539,134 | $10.0M | 0.11% | −1,432,577−72.7% | Reduced |
| UBS Asset Management Americas Inc | 507,186 | $9.43M | 0.00% | +63,354+14.3% | Added |
| Axiom Investors LLC | 472,036 | $8.78M | 0.10% | −249,460−34.6% | Reduced |
| D. E. Shaw & Co., Inc. | 468,137 | $8.70M | 0.01% | −161,038−25.6% | Reduced |
| Swiss National Bank | 465,900 | $8.66M | 0.00% | +1,700+0.4% | Added |
| Peregrine Capital Management LLC | 462,383 | $8.60M | 0.32% | +59,259+14.7% | Added |
| SEI Investments Co | 458,359 | $8.52M | 0.01% | +1,847+0.4% | Added |
| Standard Life Aberdeen plc | 456,462 | $8.49M | 0.01% | +456,462 | New |
| Royce & Associates LP | 451,755 | $8.40M | 0.08% | +157,837+53.7% | Added |
| Exchange Traded Concepts, LLC | 406,982 | $7.57M | 0.06% | +113,193+38.5% | Added |
| Bastion Asset Management Inc. | 389,158 | $7.29M | 2.22% | +389,158 | New |
| Zacks Investment Management | 388,877 | $7.23M | 0.06% | −13,330−3.3% | Reduced |
| Price T Rowe Associates Inc | 382,788 | $7.12M | 0.00% | −451,542−54.1% | Reduced |
| Bank of Nova Scotia | 380,186 | $7.07M | 0.01% | −10,820−2.8% | Reduced |
| Mirova | 368,380 | $6.85M | 0.28% | +368,380 | New |
| Gabelli Funds LLC | 367,980 | $6.84M | 0.05% | −62,270−14.5% | Reduced |
| Sumitomo Mitsui DS Asset Management Company, Ltd | 363,598 | $6.76M | 0.05% | −35,945−9.0% | Reduced |
| Bridgewater Associates, LP | 351,785 | $6.54M | 0.03% | −138,143−28.2% | Reduced |
| Burkehill Global Management, LP | 350,000 | $6.51M | 0.32% | 00.0% | Unchanged |
| TD Asset Management Inc | 348,096 | $6.47M | 0.01% | +220.0% | Added |