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 |
|---|---|---|---|---|---|
| Envestnet Asset Management Inc | 338,658 | $6.30M | 0.00% | +90,882+36.7% | Added |
| Zevenbergen Capital Investments LLC | 326,300 | $6.07M | 0.17% | +105,000+47.4% | Added |
| Ardsley Advisory Partners LP | 325,000 | $6.04M | 0.92% | 00.0% | Unchanged |
| Lazard Asset Management LLC | 322,421 | $5.99M | 0.01% | +179,358+125.4% | Added |
| Summit Creek Advisors LLC | 315,880 | $5.87M | 1.21% | +315,880 | New |
| Essex Investment Management Co LLC | 309,110 | $5.75M | 0.91% | +5,758+1.9% | Added |
| Montanaro Asset Management Ltd | 305,300 | $5.68M | 1.70% | +49,900+19.5% | Added |
| California State Teachers Retirement System | 274,096 | $5.10M | 0.01% | +49,751+22.2% | Added |
| Walleye Capital LLC | 272,964 | $5.07M | 0.03% | +34,704+14.6% | Added |
| AQR Capital Management LLC | 269,072 | $5.00M | 0.00% | −8,647−3.1% | Reduced |
| Connor, Clark & Lunn Investment Management Ltd. | 266,099 | $4.95M | 0.01% | +195,181+275.2% | Added |
| Prudential Financial Inc | 249,515 | $4.64M | 0.01% | +18,235+7.9% | Added |
| State of Wisconsin Investment Board | 242,812 | $4.51M | 0.01% | +16,278+7.2% | Added |
| Robeco Schweiz AG | 230,000 | $4.28M | 0.09% | 00.0% | Unchanged |
| Fifth Third Bancorp | 227,118 | $4.22M | 0.01% | +225,989+20,016.7% | Added |
| Bessemer Group Inc | 197,580 | $3.67M | 0.01% | +235+0.1% | Added |
| Rice Hall James & Associates, LLC | 196,899 | $3.66M | 0.20% | −2,953−1.5% | Reduced |
| Advisor Group Holdings, Inc. | 185,047 | $3.44M | 0.01% | +181,785+5,572.8% | Added |
| Vanguard Asset Management, Ltd | 178,612 | $3.32M | 0.00% | +178,612 | New |
| Kornitzer Capital Management Inc | 174,665 | $3.25M | 0.07% | +174,665 | New |
| Point72 Asset Management, L.P. | 174,271 | $3.24M | 0.01% | +174,271 | New |
| Hollow Brook Wealth Management LLC | 172,004 | $3.20M | 0.82% | +425+0.2% | Added |
| Thrivent Financial for Lutherans | 163,304 | $3.04M | 0.01% | −6,979−4.1% | Reduced |
| Susquehanna International Group, LLP | 161,350 | $3.00M | 0.00% | +161,350 | New |
| Tema ETFs LLC | 155,740 | $2.90M | 0.19% | +50,778+48.4% | Added |
| KBC Group NV | 153,925 | $2.86M | 0.01% | +146,256+1,907.1% | Added |
| Victory Capital Management Inc | 151,969 | $2.83M | 0.00% | −253,922−62.6% | Reduced |
| Aperture Investors, LLC | 151,685 | $2.82M | 0.36% | 00.0% | Unchanged |
| First Trust Advisors LP | 146,993 | $2.73M | 0.00% | −201,111−57.8% | Reduced |
| Boothbay Fund Management, LLC | 143,658 | $2.67M | 0.06% | −30,197−17.4% | Reduced |
| DDD Partners, LLC | 142,790 | $2.65M | 0.18% | +79,752+126.5% | Added |
| Creative Planning | 139,259 | $2.59M | 0.00% | −14,476−9.4% | Reduced |
| Pathstone Holdings, LLC | 132,132 | $2.46M | 0.01% | −24,135−15.4% | Reduced |
| State of Alaska, Department of Revenue | 131,845 | $2.45M | 0.03% | −5,307−3.9% | Reduced |
| MetLife Investment Management | 130,999 | $2.44M | 0.01% | −1,018−0.8% | Reduced |
| UniSuper Management Pty Ltd | 129,502 | $2.41M | 0.02% | 00.0% | Unchanged |
| Illinois Municipal Retirement Fund | 126,334 | $2.35M | 0.03% | −10,874−7.9% | Reduced |
| Madison Asset Management, LLC | 124,323 | $2.31M | 0.03% | +67,679+119.5% | Added |
| Kennedy Capital Management, Inc. | 123,564 | $2.30M | 0.05% | −1,512−1.2% | Reduced |
| Qube Research & Technologies Ltd | 123,462 | $2.30M | 0.00% | +123,462 | New |
| Covea Finance | 119,200 | $2.22M | 0.08% | +119,200 | New |
| LPL Financial LLC | 114,095 | $2.12M | 0.00% | −1,620−1.4% | Reduced |
| First National Bank of Omaha | 113,516 | $2.11M | 0.07% | +2,669+2.4% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 112,411 | $2.09M | 0.00% | +1,029+0.9% | Added |
| Manufacturers Life Insurance Company, The | 111,658 | $2.08M | 0.00% | −3,883−3.4% | Reduced |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 108,598 | $2.02M | 0.00% | +24,832+29.6% | Added |
| Louisiana State Employees Retirement System | 108,500 | $2.02M | 0.04% | −5,000−4.4% | Reduced |
| State of New Jersey Common Pension Fund D | 104,747 | $1.95M | 0.01% | +14,351+15.9% | Added |
| First National Advisers, LLC | 104,679 | $1.95M | 0.28% | −6,520−5.9% | Reduced |
| Register Financial Advisors LLC | 103,650 | $1.93M | 0.71% | +30,000+40.7% | Added |
| Vanguard Global Advisers, LLC | 103,131 | $1.92M | 0.00% | +103,131 | New |
| FIL Ltd | 100,000 | $1.86M | 0.00% | 00.0% | Unchanged |
| Legato Capital Management LLC | 97,366 | $1.81M | 0.16% | −179,135−64.8% | Reduced |
| Scotia Capital Inc. | 94,737 | $1.76M | 0.01% | +94,737 | New |
| New York State Teachers Retirement System | 89,717 | $1.67M | 0.00% | −8,119−8.3% | Reduced |
| Handelsbanken Fonder AB | 89,031 | $1.66M | 0.01% | +16,500+22.7% | Added |
| RMB Capital Management, LLC | 88,444 | $1.64M | 0.03% | +88,444 | New |
| Holocene Advisors, LP | 85,066 | $1.58M | 0.00% | +85,066 | New |
| Dana Investment Advisors, Inc. | 83,120 | $1.55M | 0.05% | +83,120 | New |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 79,813 | $1.48M | 0.00% | −245,953−75.5% | Reduced |
| La Banque Postale Asset Management SA | 78,246 | $1.45M | 0.02% | +41,156+111.0% | Added |
| Sumitomo Life Insurance Co | 76,609 | $1.42M | 0.03% | −5,291−6.5% | Reduced |
| Capstone Investment Advisors, LLC | 75,700 | $1.41M | 0.01% | 00.0% | Unchanged |
| New York State Common Retirement Fund | 74,790 | $1.39M | 0.00% | −100,885−57.4% | Reduced |
| Intech Investment Management LLC | 72,432 | $1.35M | 0.01% | −38,190−34.5% | Reduced |
| Amalgamated Bank | 70,175 | $1.30M | 0.01% | −1,606−2.2% | Reduced |
| Russell Investments Group, Ltd. | 67,659 | $1.26M | 0.00% | +45,579+206.4% | Added |
| Stifel Financial Corp | 66,658 | $1.24M | 0.00% | +7,577+12.8% | Added |
| Yousif Capital Management, LLC | 65,896 | $1.23M | 0.01% | −1,063−1.6% | Reduced |
| Police & Firemen's Retirement System of New Jersey | 65,346 | $1.21M | 0.01% | +1,570+2.5% | Added |
| Tribune Investment Group LP | 65,000 | $1.21M | 0.81% | +65,000 | New |
| Arizona State Retirement System | 64,638 | $1.20M | 0.01% | −840−1.3% | Reduced |
| Pacer Advisors, Inc. | 64,182 | $1.19M | 0.00% | −15,945−19.9% | Reduced |
| Teachers Retirement System of the State of Kentucky | 60,506 | $1.13M | 0.01% | 00.0% | Unchanged |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 60,504 | $1.12M | 0.01% | −848−1.4% | Reduced |
| Vanguard Investments Australia, Ltd. | 58,950 | $1.10M | 0.00% | +58,950 | New |
| State Board of Administration of Florida Retirement System | 57,210 | $1.06M | 0.00% | 00.0% | Unchanged |
| Oregon Public Employees Retirement Fund | 55,900 | $1.04M | 0.01% | −800−1.4% | Reduced |
| State of Tennessee, Treasury Department | 55,543 | $1.03M | 0.00% | −18,958−25.4% | Reduced |
| Asset Management One Co.,Ltd. | 55,723 | $1.03M | 0.00% | +55,723 | New |
| Natixis Advisors, L.P. | 53,672 | $997.0K | 0.00% | −70,776−56.9% | Reduced |
| KLP Kapitalforvaltning AS | 52,000 | $966.7K | 0.00% | +1,800+3.6% | Added |
| Thornburg Investment Management Inc | 51,597 | $959.2K | 0.01% | −174,612−77.2% | Reduced |
| PEAK6 LLC | 50,935 | $946.9K | 0.03% | +43,961+630.4% | Added |
| 1832 Asset Management L.P. | 50,000 | $929.5K | 0.00% | 00.0% | Unchanged |
| Nicholas Investment Partners, LP | 49,278 | $916.1K | 0.07% | −592,382−92.3% | Reduced |
| Hudson Bay Capital Management LP | 46,270 | $860.2K | 0.01% | +6,270+15.7% | Added |
| Neo Ivy Capital Management | 44,607 | $829.2K | 0.22% | +44,607 | New |
| Barclays PLC | 43,790 | $814.1K | 0.00% | −330,216−88.3% | Reduced |
| Cresset Asset Management, LLC | 42,556 | $791.1K | 0.00% | +56+0.1% | Added |
| Blackstone Group Inc. | 42,414 | $788.5K | 0.00% | +42,414 | New |
| Quantinno Capital Management LP | 41,705 | $775.3K | 0.00% | +30,419+269.5% | Added |
| Oppenheimer & Co Inc | 41,615 | $773.6K | 0.01% | +7,634+22.5% | Added |
| Themes Management Co LLC | 38,837 | $722.0K | 0.45% | +14,098+57.0% | Added |
| Entropy Technologies, LP | 38,507 | $715.8K | 0.03% | +38,507 | New |
| Sterling Capital Management LLC | 38,236 | $710.8K | 0.01% | −30,566−44.4% | Reduced |
| Twin Tree Management, LP | 38,075 | $707.8K | 0.15% | +12,941+51.5% | Added |
| ProShare Advisors LLC | 37,370 | $694.7K | 0.00% | −9,358−20.0% | Reduced |
| XTX Topco Ltd | 37,178 | $691.1K | 0.01% | −87,842−70.3% | Reduced |
| Amundi | 36,691 | $682.1K | 0.00% | +24,391+198.3% | Added |