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 |
|---|---|---|---|---|---|
| Keystone Investors Pte Ltd | 309,887 | $7.26M | 0.65% | −571,706−64.8% | Reduced |
| Essex Investment Management Co LLC | 303,352 | $7.10M | 1.08% | −7,148−2.3% | Reduced |
| Royce & Associates LP | 293,918 | $6.88M | 0.07% | +141,835+93.3% | Added |
| Exchange Traded Concepts, LLC | 293,789 | $6.88M | 0.06% | +40,709+16.1% | Added |
| Tredje AP-fonden | 280,788 | $6.58M | 0.05% | +280,788 | New |
| Empowered Funds, LLC | 278,820 | $6.53M | 0.11% | −12,244−4.2% | Reduced |
| AQR Capital Management LLC | 277,719 | $6.50M | 0.00% | −14,619−5.0% | Reduced |
| Legato Capital Management LLC | 276,501 | $6.48M | 0.56% | +88,464+47.0% | Added |
| Montanaro Asset Management Ltd | 255,400 | $5.98M | 1.67% | +83,800+48.8% | Added |
| Ghisallo Capital Management LLC | 250,000 | $5.86M | 0.26% | −524,900−67.7% | Reduced |
| Wellington Management Group LLP | 248,775 | $5.83M | 0.00% | +248,775 | New |
| Envestnet Asset Management Inc | 247,776 | $5.80M | 0.00% | +19,050+8.3% | Added |
| Walleye Capital LLC | 238,260 | $5.58M | 0.03% | −216,292−47.6% | Reduced |
| Prudential Financial Inc | 231,280 | $5.42M | 0.01% | −10,360−4.3% | Reduced |
| Robeco Schweiz AG | 230,000 | $5.39M | 0.12% | 00.0% | Unchanged |
| State of Wisconsin Investment Board | 226,534 | $5.31M | 0.01% | +89,775+65.6% | Added |
| Thornburg Investment Management Inc | 226,209 | $5.30M | 0.07% | +226,209 | New |
| California State Teachers Retirement System | 224,345 | $5.25M | 0.01% | +26,376+13.3% | Added |
| Comerica Bank | 222,756 | $5.22M | 0.02% | +43,450+24.2% | Added |
| Munro Partners | 222,720 | $5.22M | 0.15% | +22,810+11.4% | Added |
| Zevenbergen Capital Investments LLC | 221,300 | $5.18M | 0.12% | −10,200−4.4% | Reduced |
| Rice Hall James & Associates, LLC | 199,852 | $4.68M | 0.26% | −23,179−10.4% | Reduced |
| Bessemer Group Inc | 197,345 | $4.62M | 0.01% | +196,666+28,964.1% | Added |
| EAM Investors, LLC | 193,324 | $4.53M | 0.50% | +46,593+31.8% | Added |
| New York State Common Retirement Fund | 175,675 | $4.11M | 0.01% | +5,800+3.4% | Added |
| Boothbay Fund Management, LLC | 173,855 | $4.07M | 0.11% | +144,903+500.5% | Added |
| Hollow Brook Wealth Management LLC | 171,579 | $4.02M | 1.04% | −84,138−32.9% | Reduced |
| Thrivent Financial for Lutherans | 170,283 | $3.99M | 0.01% | −9,498−5.3% | Reduced |
| Lisanti Capital Growth, LLC | 156,740 | $3.67M | 0.87% | +89,565+133.3% | Added |
| Pathstone Holdings, LLC | 156,267 | $3.66M | 0.01% | +7,646+5.1% | Added |
| Creative Planning | 153,735 | $3.60M | 0.00% | +23,195+17.8% | Added |
| Aperture Investors, LLC | 151,685 | $3.55M | 0.50% | −228,410−60.1% | Reduced |
| Lazard Asset Management LLC | 143,063 | $3.35M | 0.01% | −156,893−52.3% | Reduced |
| Sculptor Capital LP | 140,000 | $3.28M | 0.04% | −360,000−72.0% | Reduced |
| HRT Financial LP | 138,182 | $3.24M | 0.01% | +138,182 | New |
| Illinois Municipal Retirement Fund | 137,208 | $3.21M | 0.04% | +137,208 | New |
| State of Alaska, Department of Revenue | 137,152 | $3.21M | 0.03% | +11,745+9.4% | Added |
| MetLife Investment Management | 132,017 | $3.09M | 0.01% | −4,473−3.3% | Reduced |
| UniSuper Management Pty Ltd | 129,502 | $3.03M | 0.02% | +129,502 | New |
| Kennedy Capital Management, Inc. | 125,076 | $2.93M | 0.06% | +505+0.4% | Added |
| XTX Topco Ltd | 125,020 | $2.93M | 0.08% | +125,020 | New |
| Natixis Advisors, L.P. | 124,448 | $2.92M | 0.00% | +110,352+782.9% | Added |
| TD Waterhouse Canada Inc. | 117,973 | $2.76M | 0.02% | +116,973+11,697.3% | Added |
| LPL Financial LLC | 115,715 | $2.71M | 0.00% | +39,487+51.8% | Added |
| Manufacturers Life Insurance Company, The | 115,541 | $2.71M | 0.00% | +3,418+3.0% | Added |
| Louisiana State Employees Retirement System | 113,500 | $2.66M | 0.05% | +8,700+8.3% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 111,382 | $2.61M | 0.00% | +9,952+9.8% | Added |
| First National Advisers, LLC | 111,199 | $2.60M | 0.36% | +111,199 | New |
| First National Bank of Omaha | 110,847 | $2.60M | 0.08% | +110,847 | New |
| Intech Investment Management LLC | 110,622 | $2.59M | 0.02% | +16,096+17.0% | Added |
| Ci Investments Inc. | 106,612 | $2.50M | 0.01% | +10,047+10.4% | Added |
| NEOS Investment Management LLC | 104,962 | $2.46M | 0.01% | +104,962 | New |
| Tema ETFs LLC | 104,962 | $2.46M | 0.19% | +104,962 | New |
| Credit Agricole S A | 103,179 | $2.42M | 0.01% | +103,179 | New |
| FIL Ltd | 100,000 | $2.34M | 0.00% | −460,893−82.2% | Reduced |
| New York State Teachers Retirement System | 97,836 | $2.29M | 0.00% | +43,300+79.4% | Added |
| Blackhawk Capital Partners LLC. | 93,407 | $2.19M | 0.82% | +4,153+4.7% | Added |
| Gotham Asset Management, LLC | 93,039 | $2.18M | 0.01% | +93,039 | New |
| Norges Bank | 92,105 | $2.16M | 0.00% | +92,105 | New |
| State of New Jersey Common Pension Fund D | 90,396 | $2.12M | 0.01% | −14,852−14.1% | Reduced |
| Verition Fund Management LLC | 89,100 | $2.09M | 0.01% | −73,120−45.1% | Reduced |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 83,766 | $1.96M | 0.00% | +42,803+104.5% | Added |
| Sumitomo Life Insurance Co | 81,900 | $1.92M | 0.05% | +209+0.3% | Added |
| Pacer Advisors, Inc. | 80,127 | $1.88M | 0.00% | +80,127 | New |
| Polen Capital Management LLC | 79,419 | $1.86M | 0.01% | +3,300+4.3% | Added |
| State of Tennessee, Treasury Department | 74,501 | $1.85M | 0.01% | +17,081+29.7% | Added |
| Capstone Investment Advisors, LLC | 75,700 | $1.77M | 0.01% | 00.0% | Unchanged |
| Yousif Capital Management, LLC | 66,959 | $1.76M | 0.02% | −8,032−10.7% | Reduced |
| Register Financial Advisors LLC | 73,650 | $1.72M | 0.67% | +7,850+11.9% | Added |
| Handelsbanken Fonder AB | 72,531 | $1.70M | 0.01% | 00.0% | Unchanged |
| Amalgamated Bank | 71,781 | $1.68M | 0.01% | +2,052+2.9% | Added |
| Connor, Clark & Lunn Investment Management Ltd. | 70,918 | $1.66M | 0.00% | +70,918 | New |
| Sterling Capital Management LLC | 68,802 | $1.61M | 0.03% | −19,792−22.3% | Reduced |
| Arizona State Retirement System | 65,478 | $1.53M | 0.01% | +2,071+3.3% | Added |
| Police & Firemen's Retirement System of New Jersey | 63,776 | $1.49M | 0.01% | +4,144+6.9% | Added |
| DDD Partners, LLC | 63,038 | $1.48M | 0.09% | +63,038 | New |
| Mariner, LLC | 62,504 | $1.46M | 0.00% | +26,698+74.6% | Added |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 61,352 | $1.44M | 0.01% | −1,094−1.8% | Reduced |
| Teachers Retirement System of the State of Kentucky | 60,506 | $1.42M | 0.01% | +8,006+15.2% | Added |
| Stifel Financial Corp | 59,081 | $1.38M | 0.00% | +59,081 | New |
| State Board of Administration of Florida Retirement System | 57,210 | $1.34M | 0.00% | 00.0% | Unchanged |
| Twinbeech Capital LP | 57,100 | $1.34M | 0.10% | +57,100 | New |
| Oregon Public Employees Retirement Fund | 56,700 | $1.33M | 0.02% | +1,500+2.7% | Added |
| Madison Asset Management, LLC | 56,644 | $1.33M | 0.02% | +56,644 | New |
| KLP Kapitalforvaltning AS | 50,200 | $1.18M | 0.00% | +5,800+13.1% | Added |
| 1832 Asset Management L.P. | 50,000 | $1.17M | 0.00% | +10,000+25.0% | Added |
| PensionDanmark Pensionsforsikringsaktieselskab | 50,000 | $1.17M | 0.01% | +50,000 | New |
| Daiwa Securities Group Inc. | 47,000 | $1.10M | 0.00% | +1,600+3.5% | Added |
| ProShare Advisors LLC | 46,728 | $1.09M | 0.00% | +5,141+12.4% | Added |
| Zions Bancorporation, National Association | 44,771 | $1.05M | 0.05% | +44,771 | New |
| Qsemble Capital Management, LP | 44,319 | $1.04M | 0.09% | +44,319 | New |
| SG Americas Securities, LLC | 43,827 | $1.03M | 0.00% | −73,242−62.6% | Reduced |
| Cresset Asset Management, LLC | 42,500 | $995.4K | 0.00% | 00.0% | Unchanged |
| Hudson Bay Capital Management LP | 40,000 | $936.8K | 0.01% | +40,000 | New |
| La Banque Postale Asset Management SA | 37,090 | $868.6K | 0.01% | +37,090 | New |
| Maryland State Retirement & Pension System | 36,281 | $849.7K | 0.02% | +864+2.4% | Added |
| Dymon Asia Capital (Singapore) Pte. Ltd. | 34,774 | $814.4K | 0.18% | +17,674+103.4% | Added |
| Ostrum Asset Management | 34,380 | $805.2K | 0.04% | +34,380 | New |
| Oppenheimer & Co Inc | 33,981 | $795.8K | 0.01% | +1,919+6.0% | Added |
| Truist Financial Corp | 33,856 | $792.9K | 0.00% | +1,653+5.1% | Added |