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 |
|---|---|---|---|---|---|
| Polen Capital Management LLC | 79,419 | $1.86M | 0.01% | +3,300+4.3% | Added |
| Pacer Advisors, Inc. | 80,127 | $1.88M | 0.00% | +80,127 | New |
| Sumitomo Life Insurance Co | 81,900 | $1.92M | 0.05% | +209+0.3% | Added |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 83,766 | $1.96M | 0.00% | +42,803+104.5% | Added |
| Verition Fund Management LLC | 89,100 | $2.09M | 0.01% | −73,120−45.1% | Reduced |
| State of New Jersey Common Pension Fund D | 90,396 | $2.12M | 0.01% | −14,852−14.1% | Reduced |
| Norges Bank | 92,105 | $2.16M | 0.00% | +92,105 | New |
| Gotham Asset Management, LLC | 93,039 | $2.18M | 0.01% | +93,039 | New |
| Blackhawk Capital Partners LLC. | 93,407 | $2.19M | 0.82% | +4,153+4.7% | Added |
| New York State Teachers Retirement System | 97,836 | $2.29M | 0.00% | +43,300+79.4% | Added |
| FIL Ltd | 100,000 | $2.34M | 0.00% | −460,893−82.2% | Reduced |
| Credit Agricole S A | 103,179 | $2.42M | 0.01% | +103,179 | New |
| 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 |
| Ci Investments Inc. | 106,612 | $2.50M | 0.01% | +10,047+10.4% | Added |
| Intech Investment Management LLC | 110,622 | $2.59M | 0.02% | +16,096+17.0% | Added |
| First National Bank of Omaha | 110,847 | $2.60M | 0.08% | +110,847 | New |
| First National Advisers, LLC | 111,199 | $2.60M | 0.36% | +111,199 | New |
| Mirae Asset Global ETFs Holdings Ltd. | 111,382 | $2.61M | 0.00% | +9,952+9.8% | Added |
| Louisiana State Employees Retirement System | 113,500 | $2.66M | 0.05% | +8,700+8.3% | Added |
| Manufacturers Life Insurance Company, The | 115,541 | $2.71M | 0.00% | +3,418+3.0% | Added |
| LPL Financial LLC | 115,715 | $2.71M | 0.00% | +39,487+51.8% | Added |
| TD Waterhouse Canada Inc. | 117,973 | $2.76M | 0.02% | +116,973+11,697.3% | Added |
| Natixis Advisors, L.P. | 124,448 | $2.92M | 0.00% | +110,352+782.9% | Added |
| XTX Topco Ltd | 125,020 | $2.93M | 0.08% | +125,020 | New |
| Kennedy Capital Management, Inc. | 125,076 | $2.93M | 0.06% | +505+0.4% | Added |
| UniSuper Management Pty Ltd | 129,502 | $3.03M | 0.02% | +129,502 | New |
| MetLife Investment Management | 132,017 | $3.09M | 0.01% | −4,473−3.3% | Reduced |
| State of Alaska, Department of Revenue | 137,152 | $3.21M | 0.03% | +11,745+9.4% | Added |
| Illinois Municipal Retirement Fund | 137,208 | $3.21M | 0.04% | +137,208 | New |
| HRT Financial LP | 138,182 | $3.24M | 0.01% | +138,182 | New |
| Sculptor Capital LP | 140,000 | $3.28M | 0.04% | −360,000−72.0% | Reduced |
| Lazard Asset Management LLC | 143,063 | $3.35M | 0.01% | −156,893−52.3% | Reduced |
| Aperture Investors, LLC | 151,685 | $3.55M | 0.50% | −228,410−60.1% | Reduced |
| Creative Planning | 153,735 | $3.60M | 0.00% | +23,195+17.8% | Added |
| Pathstone Holdings, LLC | 156,267 | $3.66M | 0.01% | +7,646+5.1% | Added |
| Lisanti Capital Growth, LLC | 156,740 | $3.67M | 0.87% | +89,565+133.3% | Added |
| Thrivent Financial for Lutherans | 170,283 | $3.99M | 0.01% | −9,498−5.3% | Reduced |
| Hollow Brook Wealth Management LLC | 171,579 | $4.02M | 1.04% | −84,138−32.9% | Reduced |
| Boothbay Fund Management, LLC | 173,855 | $4.07M | 0.11% | +144,903+500.5% | Added |
| New York State Common Retirement Fund | 175,675 | $4.11M | 0.01% | +5,800+3.4% | Added |
| EAM Investors, LLC | 193,324 | $4.53M | 0.50% | +46,593+31.8% | Added |
| Bessemer Group Inc | 197,345 | $4.62M | 0.01% | +196,666+28,964.1% | Added |
| Rice Hall James & Associates, LLC | 199,852 | $4.68M | 0.26% | −23,179−10.4% | Reduced |
| Zevenbergen Capital Investments LLC | 221,300 | $5.18M | 0.12% | −10,200−4.4% | Reduced |
| Munro Partners | 222,720 | $5.22M | 0.15% | +22,810+11.4% | Added |
| Comerica Bank | 222,756 | $5.22M | 0.02% | +43,450+24.2% | Added |
| California State Teachers Retirement System | 224,345 | $5.25M | 0.01% | +26,376+13.3% | Added |
| Thornburg Investment Management Inc | 226,209 | $5.30M | 0.07% | +226,209 | New |
| State of Wisconsin Investment Board | 226,534 | $5.31M | 0.01% | +89,775+65.6% | Added |
| Robeco Schweiz AG | 230,000 | $5.39M | 0.12% | 00.0% | Unchanged |
| Prudential Financial Inc | 231,280 | $5.42M | 0.01% | −10,360−4.3% | Reduced |
| Walleye Capital LLC | 238,260 | $5.58M | 0.03% | −216,292−47.6% | Reduced |
| Envestnet Asset Management Inc | 247,776 | $5.80M | 0.00% | +19,050+8.3% | Added |
| Wellington Management Group LLP | 248,775 | $5.83M | 0.00% | +248,775 | New |
| Ghisallo Capital Management LLC | 250,000 | $5.86M | 0.26% | −524,900−67.7% | Reduced |
| Montanaro Asset Management Ltd | 255,400 | $5.98M | 1.67% | +83,800+48.8% | Added |
| Legato Capital Management LLC | 276,501 | $6.48M | 0.56% | +88,464+47.0% | Added |
| AQR Capital Management LLC | 277,719 | $6.50M | 0.00% | −14,619−5.0% | Reduced |
| Empowered Funds, LLC | 278,820 | $6.53M | 0.11% | −12,244−4.2% | Reduced |
| Tredje AP-fonden | 280,788 | $6.58M | 0.05% | +280,788 | New |
| Exchange Traded Concepts, LLC | 293,789 | $6.88M | 0.06% | +40,709+16.1% | Added |
| Royce & Associates LP | 293,918 | $6.88M | 0.07% | +141,835+93.3% | Added |
| Essex Investment Management Co LLC | 303,352 | $7.10M | 1.08% | −7,148−2.3% | Reduced |
| Keystone Investors Pte Ltd | 309,887 | $7.26M | 0.65% | −571,706−64.8% | Reduced |
| Alliancebernstein L.P. | 320,499 | $7.51M | 0.00% | −47,916−13.0% | Reduced |
| Ardsley Advisory Partners LP | 325,000 | $7.61M | 0.97% | −3,220−1.0% | Reduced |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 325,766 | $7.63M | 0.01% | +49,822+18.1% | Added |
| TD Asset Management Inc | 348,074 | $8.15M | 0.01% | −138,870−28.5% | Reduced |
| First Trust Advisors LP | 348,104 | $8.15M | 0.01% | +78,903+29.3% | Added |
| Castleark Management LLC | 348,130 | $8.15M | 0.24% | +348,130 | New |
| Burkehill Global Management, LP | 350,000 | $8.20M | 0.54% | 00.0% | Unchanged |
| Barclays PLC | 374,006 | $8.76M | 0.00% | −27,280−6.8% | Reduced |
| Citigroup Inc | 377,914 | $8.85M | 0.01% | −102,458−21.3% | Reduced |
| Bank of Nova Scotia | 391,006 | $9.16M | 0.01% | +391,006 | New |
| Sumitomo Mitsui DS Asset Management Company, Ltd | 399,543 | $9.36M | 0.07% | −18,247−4.4% | Reduced |
| Zacks Investment Management | 402,207 | $9.42M | 0.07% | −4,891−1.2% | Reduced |
| Toroso Investments, LLC | 403,036 | $9.44M | 0.04% | +382,259+1,839.8% | Added |
| Peregrine Capital Management LLC | 403,124 | $9.44M | 0.29% | −39,942−9.0% | Reduced |
| Victory Capital Management Inc | 405,891 | $9.51M | 0.01% | −676,735−62.5% | Reduced |
| Gabelli Funds LLC | 430,250 | $10.1M | 0.07% | −51,000−10.6% | Reduced |
| UBS Asset Management Americas Inc | 443,832 | $10.4M | 0.00% | +53,272+13.6% | Added |
| SEI Investments Co | 456,512 | $10.7M | 0.01% | +108,813+31.3% | Added |
| Swiss National Bank | 464,200 | $10.9M | 0.01% | +48,700+11.7% | Added |
| Bridgewater Associates, LP | 489,928 | $11.5M | 0.04% | +489,928 | New |
| 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 |
| Gamco Investors, Inc. Et Al | 541,929 | $12.7M | 0.12% | +15,310+2.9% | Added |
| Alta Park Capital, LP | 562,522 | $13.2M | 1.59% | −48,639−8.0% | Reduced |
| Neuberger Berman Group LLC | 567,671 | $13.3M | 0.01% | +567,671 | New |
| Deutsche Bank AG | 578,409 | $13.5M | 0.00% | +389,495+206.2% | Added |
| Oberweis Asset Management Inc | 607,800 | $14.2M | 0.52% | +607,800 | New |
| Legal & General Group Plc | 609,891 | $14.3M | 0.00% | −6,639−1.1% | Reduced |
| Rhumbline Advisers | 619,284 | $14.5M | 0.01% | +10,450+1.7% | Added |
| D. E. Shaw & Co., Inc. | 629,175 | $14.7M | 0.01% | −610,386−49.2% | Reduced |
| Nicholas Investment Partners, LP | 641,660 | $15.0M | 1.09% | +56,187+9.6% | Added |
| Ensign Peak Advisors, Inc | 649,769 | $15.2M | 0.03% | +55,463+9.3% | Added |
| Bamco Inc | 650,000 | $15.2M | 0.04% | +150,000+30.0% | Added |
| Emerald Mutual Fund Advisers Trust | 704,496 | $16.5M | 0.80% | 00.0% | Unchanged |
| ArrowMark Colorado Holdings LLC | 716,065 | $16.8M | 0.37% | −93,155−11.5% | Reduced |