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, Q3 2025
Institutional positions in Mirion Technologies, Inc. as of Sep 30, 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
- 343
- +44 vs. Q2 2025
- Shares held
- 255.0M
- +47.7M (+23.0%) vs. Q2 2025
- Total value
- $5.93B
- +$1.47B (+32.9%) vs. Q2 2025
- New holders
- 91
- 129 more added
- Sold out
- 47
- 91 more reduced
3 institutions that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 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, Q3 2025
Shares, value and share of portfolio for each institution holding Mirion Technologies, Inc.; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Ovata Capital Management Ltd | 100,000 | $2.33M | 0.47% | +100,000 | New |
| Mirae Asset Global ETFs Holdings Ltd. | 101,430 | $2.36M | 0.00% | −13,902−12.1% | Reduced |
| Louisiana State Employees Retirement System | 104,800 | $2.44M | 0.04% | +104,800 | New |
| Polar Asset Management Partners Inc. | 105,000 | $2.44M | 0.05% | −2,498−2.3% | Reduced |
| State of New Jersey Common Pension Fund D | 105,248 | $2.45M | 0.01% | −563−0.5% | Reduced |
| Manufacturers Life Insurance Company, The | 112,123 | $2.61M | 0.00% | +400+0.4% | Added |
| Concentric Capital Strategies, LP | 114,483 | $2.66M | 0.13% | −297,977−72.2% | Reduced |
| Macquarie Group Ltd | 114,724 | $2.67M | 0.00% | +114,724 | New |
| Element Capital Management LLC | 115,578 | $2.69M | 3.81% | +115,578 | New |
| SG Americas Securities, LLC | 117,069 | $2.72M | 0.01% | +41,663+55.3% | Added |
| Kennedy Capital Management, Inc. | 124,571 | $2.90M | 0.06% | +124,571 | New |
| State of Alaska, Department of Revenue | 125,407 | $2.92M | 0.03% | +125,407 | New |
| Creative Planning | 130,540 | $3.04M | 0.00% | +25,544+24.3% | Added |
| MetLife Investment Management | 136,490 | $3.17M | 0.02% | +10,955+8.7% | Added |
| State of Wisconsin Investment Board | 136,759 | $3.18M | 0.01% | −17,015−11.1% | Reduced |
| EAM Investors, LLC | 146,731 | $3.36M | 0.38% | −62,243−29.8% | Reduced |
| Pathstone Holdings, LLC | 148,621 | $3.46M | 0.01% | +10,021+7.2% | Added |
| Royce & Associates LP | 152,083 | $3.54M | 0.04% | −638,011−80.8% | Reduced |
| Centiva Capital, LP | 155,000 | $3.61M | 0.34% | +58,733+61.0% | Added |
| Verition Fund Management LLC | 162,220 | $3.77M | 0.02% | −173,223−51.6% | Reduced |
| New York State Common Retirement Fund | 169,875 | $3.95M | 0.01% | +36,694+27.6% | Added |
| Montanaro Asset Management Ltd | 171,600 | $3.99M | 1.00% | +171,600 | New |
| Comerica Bank | 179,306 | $4.17M | 0.02% | +176,874+7,272.8% | Added |
| Thrivent Financial for Lutherans | 179,781 | $4.18M | 0.01% | +179,781 | New |
| Legato Capital Management LLC | 188,037 | $4.37M | 0.48% | +37,398+24.8% | Added |
| Deutsche Bank AG | 188,914 | $4.39M | 0.00% | −75,963−28.7% | Reduced |
| Citadel Advisors LLC | 189,844 | $4.42M | 0.00% | −261,630−58.0% | Reduced |
| California State Teachers Retirement System | 197,969 | $4.60M | 0.00% | −5,433−2.7% | Reduced |
| Munro Partners | 199,910 | $4.65M | 0.13% | +78,035+64.0% | Added |
| Zimmer Partners, LP | 200,000 | $4.65M | 0.11% | +200,000 | New |
| Simplex Trading, LLC | 202,331 | $4.71M | 0.10% | +83,382+70.1% | Added |
| BNP Paribas Arbitrage, SA | 217,951 | $5.07M | 0.00% | +69,556+46.9% | Added |
| Rice Hall James & Associates, LLC | 223,031 | $5.19M | 0.28% | −46,792−17.3% | Reduced |
| Envestnet Asset Management Inc | 228,726 | $5.32M | 0.00% | −4,270−1.8% | Reduced |
| Robeco Schweiz AG | 230,000 | $5.35M | 0.12% | 00.0% | Unchanged |
| Zevenbergen Capital Investments LLC | 231,500 | $5.38M | 0.10% | +221,300+2,169.6% | Added |
| JPMorgan Chase & Co | 238,340 | $5.54M | 0.00% | −586,929−71.1% | Reduced |
| Prudential Financial Inc | 241,640 | $5.62M | 0.01% | +214,630+794.6% | Added |
| Exchange Traded Concepts, LLC | 253,080 | $5.89M | 0.06% | +71,607+39.5% | Added |
| Hollow Brook Wealth Management LLC | 255,717 | $5.95M | 1.41% | −199−0.1% | Reduced |
| First Trust Advisors LP | 269,201 | $6.26M | 0.00% | +79,166+41.7% | Added |
| Maven Securities LTD | 275,000 | $6.40M | 1.22% | +275,000 | New |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 275,944 | $6.42M | 0.01% | +35,395+14.7% | Added |
| Empowered Funds, LLC | 291,064 | $6.77M | 0.07% | +291,064 | New |
| AQR Capital Management LLC | 292,338 | $6.80M | 0.00% | −19,922−6.4% | Reduced |
| Two Sigma Investments, LP | 298,500 | $6.94M | 0.01% | +269,850+941.9% | Added |
| Lazard Asset Management LLC | 299,956 | $6.98M | 0.01% | +81,925+37.6% | Added |
| Fortress Investment Group LLC | 302,431 | $7.03M | 0.94% | +300,925+19,981.7% | Added |
| Essex Investment Management Co LLC | 310,500 | $7.22M | 1.11% | +10,684+3.6% | Added |
| Great West Life Assurance Co | 324,608 | $7.31M | 0.01% | +324,608 | New |
| Ardsley Advisory Partners LP | 328,220 | $7.63M | 1.17% | −135,000−29.1% | Reduced |
| Pinnbrook Capital Management LP | 335,070 | $7.79M | 1.44% | +335,070 | New |
| Wells Fargo & Company | 345,927 | $8.05M | 0.00% | +46,270+15.4% | Added |
| SEI Investments Co | 347,699 | $8.09M | 0.01% | −3,340−1.0% | Reduced |
| Burkehill Global Management, LP | 350,000 | $8.14M | 0.46% | +350,000 | New |
| Alliancebernstein L.P. | 368,415 | $8.57M | 0.00% | +138,953+60.6% | Added |
| Kingdon Capital Management, L.L.C. | 375,000 | $8.72M | 1.37% | −50,000−11.8% | Reduced |
| Aperture Investors, LLC | 380,095 | $8.84M | 1.23% | +35,095+10.2% | Added |
| Susquehanna International Group, LLP | 388,894 | $9.05M | 0.01% | −174,931−31.0% | Reduced |
| UBS Asset Management Americas Inc | 390,560 | $9.08M | 0.00% | −699,739−64.2% | Reduced |
| Barclays PLC | 401,286 | $9.33M | 0.00% | −10,223−2.5% | Reduced |
| Zacks Investment Management | 407,098 | $9.47M | 0.08% | +27,637+7.3% | Added |
| Swiss National Bank | 415,500 | $9.66M | 0.01% | +6,700+1.6% | Added |
| Sumitomo Mitsui DS Asset Management Company, Ltd | 417,790 | $9.72M | 0.08% | +181,450+76.8% | Added |
| Peregrine Capital Management LLC | 443,066 | $10.3M | 0.31% | +443,066 | New |
| Walleye Capital LLC | 454,552 | $10.6M | 0.09% | +372,555+454.4% | Added |
| Citigroup Inc | 480,372 | $11.2M | 0.01% | +223,271+86.8% | Added |
| Gabelli Funds LLC | 481,250 | $11.2M | 0.08% | −30,064−5.9% | Reduced |
| TD Asset Management Inc | 486,944 | $11.3M | 0.01% | +56,186+13.0% | Added |
| Bornite Capital Management LP | 500,000 | $11.6M | 1.08% | −1,551,700−75.6% | Reduced |
| Summit Partners Public Asset Management, LLC | 500,000 | $11.6M | 0.38% | −546,000−52.2% | Reduced |
| Telemark Asset Management, LLC | 500,000 | $11.6M | 1.10% | 00.0% | Unchanged |
| Bamco Inc | 500,000 | $11.6M | 0.03% | +500,000 | New |
| Sculptor Capital LP | 500,000 | $11.6M | 0.16% | +500,000 | New |
| Millennium Management LLC | 521,021 | $12.1M | 0.01% | −2,360,926−81.9% | Reduced |
| Yaupon Capital Management LP | 525,000 | $12.2M | 0.63% | +525,000 | New |
| Gamco Investors, Inc. Et Al | 526,619 | $12.2M | 0.12% | −35,455−6.3% | Reduced |
| FIL Ltd | 560,893 | $13.0M | 0.01% | 00.0% | Unchanged |
| Allspring Global Investments Holdings, LLC | 567,587 | $13.1M | 0.02% | +11,225+2.0% | Added |
| Axiom Investors LLC | 572,290 | $13.3M | 0.10% | +179,605+45.7% | Added |
| Nicholas Investment Partners, LP | 585,473 | $13.6M | 1.04% | +125,609+27.3% | Added |
| Ensign Peak Advisors, Inc | 594,306 | $13.8M | 0.02% | −6,942−1.2% | Reduced |
| Rhumbline Advisers | 608,834 | $14.2M | 0.01% | +290,232+91.1% | Added |
| Alta Park Capital, LP | 611,161 | $14.2M | 1.43% | +611,161 | New |
| Legal & General Group Plc | 616,530 | $14.3M | 0.00% | +373,706+153.9% | Added |
| Emerald Mutual Fund Advisers Trust | 704,496 | $16.4M | 0.85% | +150,872+27.3% | Added |
| Nomura Holdings Inc | 726,962 | $16.9M | 0.08% | +585,016+412.1% | Added |
| Ghisallo Capital Management LLC | 774,900 | $18.0M | 0.59% | +774,900 | New |
| Pier Capital, LLC | 794,826 | $18.5M | 2.89% | −76,202−8.7% | Reduced |
| ArrowMark Colorado Holdings LLC | 809,220 | $18.8M | 0.35% | −868,292−51.8% | Reduced |
| Price T Rowe Associates Inc | 834,330 | $19.4M | 0.00% | +665,185+393.3% | Added |
| Schwartz Investment Counsel Inc | 854,300 | $19.9M | 0.67% | −100,000−10.5% | Reduced |
| Keystone Investors Pte Ltd | 881,593 | $20.5M | 2.37% | +881,593 | New |
| Artemis Investment Management LLP | 953,407 | $22.2M | 0.28% | −2,075,561−68.5% | Reduced |
| Public Sector Pension Investment Board | 956,160 | $22.2M | 0.08% | +956,160 | New |
| Rockefeller Capital Management L.P. | 971,583 | $22.6M | 0.04% | −90,775−8.5% | Reduced |
| TimesSquare Capital Management, LLC | 1,013,339 | $23.6M | 0.34% | +1,013,339 | New |
| Franklin Resources Inc | 1,040,067 | $24.2M | 0.01% | +371,908+55.7% | Added |
| Corsair Capital Management, L.P. | 1,045,797 | $24.3M | 4.32% | −1,979,615−65.4% | Reduced |
| Jennison Associates LLC | 1,051,494 | $24.5M | 0.01% | −20,595−1.9% | Reduced |