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 |
|---|---|---|---|---|---|
| Sumitomo Life Insurance Co | 76,609 | $1.42M | 0.03% | −5,291−6.5% | Reduced |
| La Banque Postale Asset Management SA | 78,246 | $1.45M | 0.02% | +41,156+111.0% | Added |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 79,813 | $1.48M | 0.00% | −245,953−75.5% | Reduced |
| Dana Investment Advisors, Inc. | 83,120 | $1.55M | 0.05% | +83,120 | New |
| Holocene Advisors, LP | 85,066 | $1.58M | 0.00% | +85,066 | New |
| RMB Capital Management, LLC | 88,444 | $1.64M | 0.03% | +88,444 | New |
| Handelsbanken Fonder AB | 89,031 | $1.66M | 0.01% | +16,500+22.7% | Added |
| New York State Teachers Retirement System | 89,717 | $1.67M | 0.00% | −8,119−8.3% | Reduced |
| Scotia Capital Inc. | 94,737 | $1.76M | 0.01% | +94,737 | New |
| Legato Capital Management LLC | 97,366 | $1.81M | 0.16% | −179,135−64.8% | Reduced |
| FIL Ltd | 100,000 | $1.86M | 0.00% | 00.0% | Unchanged |
| Vanguard Global Advisers, LLC | 103,131 | $1.92M | 0.00% | +103,131 | New |
| Register Financial Advisors LLC | 103,650 | $1.93M | 0.71% | +30,000+40.7% | Added |
| First National Advisers, LLC | 104,679 | $1.95M | 0.28% | −6,520−5.9% | Reduced |
| State of New Jersey Common Pension Fund D | 104,747 | $1.95M | 0.01% | +14,351+15.9% | Added |
| Louisiana State Employees Retirement System | 108,500 | $2.02M | 0.04% | −5,000−4.4% | Reduced |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 108,598 | $2.02M | 0.00% | +24,832+29.6% | Added |
| Manufacturers Life Insurance Company, The | 111,658 | $2.08M | 0.00% | −3,883−3.4% | Reduced |
| Mirae Asset Global ETFs Holdings Ltd. | 112,411 | $2.09M | 0.00% | +1,029+0.9% | Added |
| First National Bank of Omaha | 113,516 | $2.11M | 0.07% | +2,669+2.4% | Added |
| LPL Financial LLC | 114,095 | $2.12M | 0.00% | −1,620−1.4% | Reduced |
| Covea Finance | 119,200 | $2.22M | 0.08% | +119,200 | New |
| Qube Research & Technologies Ltd | 123,462 | $2.30M | 0.00% | +123,462 | New |
| Kennedy Capital Management, Inc. | 123,564 | $2.30M | 0.05% | −1,512−1.2% | Reduced |
| Madison Asset Management, LLC | 124,323 | $2.31M | 0.03% | +67,679+119.5% | Added |
| Illinois Municipal Retirement Fund | 126,334 | $2.35M | 0.03% | −10,874−7.9% | Reduced |
| UniSuper Management Pty Ltd | 129,502 | $2.41M | 0.02% | 00.0% | Unchanged |
| MetLife Investment Management | 130,999 | $2.44M | 0.01% | −1,018−0.8% | Reduced |
| State of Alaska, Department of Revenue | 131,845 | $2.45M | 0.03% | −5,307−3.9% | Reduced |
| Pathstone Holdings, LLC | 132,132 | $2.46M | 0.01% | −24,135−15.4% | Reduced |
| Creative Planning | 139,259 | $2.59M | 0.00% | −14,476−9.4% | Reduced |
| DDD Partners, LLC | 142,790 | $2.65M | 0.18% | +79,752+126.5% | Added |
| Boothbay Fund Management, LLC | 143,658 | $2.67M | 0.06% | −30,197−17.4% | Reduced |
| First Trust Advisors LP | 146,993 | $2.73M | 0.00% | −201,111−57.8% | Reduced |
| Aperture Investors, LLC | 151,685 | $2.82M | 0.36% | 00.0% | Unchanged |
| Victory Capital Management Inc | 151,969 | $2.83M | 0.00% | −253,922−62.6% | Reduced |
| KBC Group NV | 153,925 | $2.86M | 0.01% | +146,256+1,907.1% | Added |
| Tema ETFs LLC | 155,740 | $2.90M | 0.19% | +50,778+48.4% | Added |
| Susquehanna International Group, LLP | 161,350 | $3.00M | 0.00% | +161,350 | New |
| Thrivent Financial for Lutherans | 163,304 | $3.04M | 0.01% | −6,979−4.1% | Reduced |
| Hollow Brook Wealth Management LLC | 172,004 | $3.20M | 0.82% | +425+0.2% | Added |
| Point72 Asset Management, L.P. | 174,271 | $3.24M | 0.01% | +174,271 | New |
| Kornitzer Capital Management Inc | 174,665 | $3.25M | 0.07% | +174,665 | New |
| Vanguard Asset Management, Ltd | 178,612 | $3.32M | 0.00% | +178,612 | New |
| Advisor Group Holdings, Inc. | 185,047 | $3.44M | 0.01% | +181,785+5,572.8% | Added |
| Rice Hall James & Associates, LLC | 196,899 | $3.66M | 0.20% | −2,953−1.5% | Reduced |
| Bessemer Group Inc | 197,580 | $3.67M | 0.01% | +235+0.1% | Added |
| Fifth Third Bancorp | 227,118 | $4.22M | 0.01% | +225,989+20,016.7% | Added |
| Robeco Schweiz AG | 230,000 | $4.28M | 0.09% | 00.0% | Unchanged |
| State of Wisconsin Investment Board | 242,812 | $4.51M | 0.01% | +16,278+7.2% | Added |
| Prudential Financial Inc | 249,515 | $4.64M | 0.01% | +18,235+7.9% | Added |
| Connor, Clark & Lunn Investment Management Ltd. | 266,099 | $4.95M | 0.01% | +195,181+275.2% | Added |
| AQR Capital Management LLC | 269,072 | $5.00M | 0.00% | −8,647−3.1% | Reduced |
| Walleye Capital LLC | 272,964 | $5.07M | 0.03% | +34,704+14.6% | Added |
| California State Teachers Retirement System | 274,096 | $5.10M | 0.01% | +49,751+22.2% | Added |
| Montanaro Asset Management Ltd | 305,300 | $5.68M | 1.70% | +49,900+19.5% | Added |
| Essex Investment Management Co LLC | 309,110 | $5.75M | 0.91% | +5,758+1.9% | Added |
| Summit Creek Advisors LLC | 315,880 | $5.87M | 1.21% | +315,880 | New |
| Lazard Asset Management LLC | 322,421 | $5.99M | 0.01% | +179,358+125.4% | Added |
| Ardsley Advisory Partners LP | 325,000 | $6.04M | 0.92% | 00.0% | Unchanged |
| Zevenbergen Capital Investments LLC | 326,300 | $6.07M | 0.17% | +105,000+47.4% | Added |
| Envestnet Asset Management Inc | 338,658 | $6.30M | 0.00% | +90,882+36.7% | Added |
| TD Asset Management Inc | 348,096 | $6.47M | 0.01% | +220.0% | Added |
| Burkehill Global Management, LP | 350,000 | $6.51M | 0.32% | 00.0% | Unchanged |
| Bridgewater Associates, LP | 351,785 | $6.54M | 0.03% | −138,143−28.2% | Reduced |
| Sumitomo Mitsui DS Asset Management Company, Ltd | 363,598 | $6.76M | 0.05% | −35,945−9.0% | Reduced |
| Gabelli Funds LLC | 367,980 | $6.84M | 0.05% | −62,270−14.5% | Reduced |
| Mirova | 368,380 | $6.85M | 0.28% | +368,380 | New |
| Bank of Nova Scotia | 380,186 | $7.07M | 0.01% | −10,820−2.8% | Reduced |
| Price T Rowe Associates Inc | 382,788 | $7.12M | 0.00% | −451,542−54.1% | Reduced |
| Zacks Investment Management | 388,877 | $7.23M | 0.06% | −13,330−3.3% | Reduced |
| Bastion Asset Management Inc. | 389,158 | $7.29M | 2.22% | +389,158 | New |
| Exchange Traded Concepts, LLC | 406,982 | $7.57M | 0.06% | +113,193+38.5% | Added |
| Royce & Associates LP | 451,755 | $8.40M | 0.08% | +157,837+53.7% | Added |
| Standard Life Aberdeen plc | 456,462 | $8.49M | 0.01% | +456,462 | New |
| SEI Investments Co | 458,359 | $8.52M | 0.01% | +1,847+0.4% | Added |
| Peregrine Capital Management LLC | 462,383 | $8.60M | 0.32% | +59,259+14.7% | Added |
| Swiss National Bank | 465,900 | $8.66M | 0.00% | +1,700+0.4% | Added |
| D. E. Shaw & Co., Inc. | 468,137 | $8.70M | 0.01% | −161,038−25.6% | Reduced |
| Axiom Investors LLC | 472,036 | $8.78M | 0.10% | −249,460−34.6% | Reduced |
| UBS Asset Management Americas Inc | 507,186 | $9.43M | 0.00% | +63,354+14.3% | Added |
| Artemis Investment Management LLP | 539,134 | $10.0M | 0.11% | −1,432,577−72.7% | Reduced |
| Gamco Investors, Inc. Et Al | 544,662 | $10.1M | 0.10% | +2,733+0.5% | Added |
| Legal & General Group Plc | 555,910 | $10.3M | 0.00% | −53,981−8.9% | Reduced |
| ArrowMark Colorado Holdings LLC | 575,155 | $10.7M | 0.28% | −140,910−19.7% | Reduced |
| Deutsche Bank AG | 613,048 | $11.4M | 0.00% | +34,639+6.0% | Added |
| Ensign Peak Advisors, Inc | 631,418 | $11.7M | 0.02% | −18,351−2.8% | Reduced |
| Rhumbline Advisers | 634,415 | $11.8M | 0.01% | +15,131+2.4% | Added |
| Wells Fargo & Company | 678,437 | $12.6M | 0.00% | −191,819−22.0% | Reduced |
| Silvercrest Asset Management Group LLC | 680,355 | $12.6M | 0.09% | −137,889−16.9% | Reduced |
| Pier Capital, LLC | 703,811 | $13.1M | 2.16% | −13,581−1.9% | Reduced |
| Nomura Asset Management International Inc. | 727,278 | $13.5M | 0.02% | −127,467−14.9% | Reduced |
| Oberweis Asset Management Inc | 744,267 | $13.8M | 0.41% | +136,467+22.5% | Added |
| Nomura Holdings Inc | 764,560 | $14.2M | 0.12% | +3,827+0.5% | Added |
| Toroso Investments, LLC | 775,013 | $14.4M | 0.04% | +371,977+92.3% | Added |
| Federated Hermes, Inc. | 816,447 | $15.2M | 0.02% | −32,123−3.8% | Reduced |
| Wellington Management Group LLP | 837,812 | $15.6M | 0.00% | +589,037+236.8% | Added |
| Schwartz Investment Counsel Inc | 854,300 | $15.9M | 0.56% | +60,000+7.6% | Added |
| Neuberger Berman Group LLC | 856,389 | $15.9M | 0.01% | +288,718+50.9% | Added |
| Emerald Mutual Fund Advisers Trust | 873,466 | $16.2M | 0.79% | +168,970+24.0% | Added |