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, Q2 2025
Institutional positions in Mirion Technologies, Inc. as of Jun 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
- 302
- +73 vs. Q1 2025
- Shares held
- 207.4M
- +22.0M (+11.9%) vs. Q1 2025
- Total value
- $4.46B
- +$1.78B (+66.0%) vs. Q1 2025
- New holders
- 103
- 115 more added
- Sold out
- 30
- 62 more reduced
1 institution that held it in Q1 2025 haven't filed for Q2 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 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, Q2 2025
Shares, value and share of portfolio for each institution holding Mirion Technologies, Inc.; share changes are against Q1 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Vanguard Group Inc | 23,766,592 | $511.7M | 0.01% | +508,544+2.2% | Added |
| T. Rowe Price Investment Management, Inc. | 20,957,520 | $451.2M | 0.28% | +247,131+1.2% | Added |
| BlackRock, Inc. | 17,012,641 | $366.3M | 0.01% | +872,717+5.4% | Added |
| Janus Henderson Group PLC | 7,988,396 | $172.0M | 0.08% | −599,268−7.0% | Reduced |
| Cooperman Leon G | 7,125,000 | $153.4M | 5.39% | +100,000+1.4% | Added |
| Dimensional Fund Advisors LP | 6,947,380 | $149.6M | 0.03% | −416,574−5.7% | Reduced |
| Brown Advisory Inc | 5,400,405 | $116.3M | 0.15% | −160,056−2.9% | Reduced |
| Maverick Capital LtdSuperinvestorMaverick Capital | 5,308,038 | $114.3M | 1.75% | −2,748,071−34.1% | Reduced |
| State Street Corp | 5,094,072 | $109.7M | 0.00% | −45,497−0.9% | Reduced |
| Geode Capital Management, LLC | 4,739,240 | $102.0M | 0.01% | +4710.0% | Added |
| Alyeska Investment Group, L.P. | 4,446,853 | $95.7M | 0.34% | +296,591+7.1% | Added |
| Swedbank AB | 4,126,035 | $88.8M | 0.10% | +4,126,035 | New |
| Massachusetts Financial Services Co | 3,833,668 | $82.5M | 0.03% | +3,833,668 | New |
| American Century Companies Inc | 3,373,352 | $72.6M | 0.04% | −59,462−1.7% | Reduced |
| Artemis Investment Management LLP | 3,028,968 | $65.2M | 0.84% | +30,533+1.0% | Added |
| Corsair Capital Management, L.P. | 3,025,412 | $65.1M | 12.48% | −46,591−1.5% | Reduced |
| Millennium Management LLC | 2,881,947 | $62.0M | 0.06% | +314,287+12.2% | Added |
| Invesco Ltd. | 2,617,252 | $56.3M | 0.01% | +2,295,414+713.2% | Added |
| Lord, Abbett & Co. LLC | 2,459,638 | $53.0M | 0.17% | +59,774+2.5% | Added |
| Arrowstreet Capital, Limited Partnership | 2,281,180 | $49.1M | 0.03% | −508,329−18.2% | Reduced |
| Bornite Capital Management LP | 2,051,700 | $44.2M | 4.42% | −12,600−0.6% | Reduced |
| Select Equity Group, L.P. | 2,027,559 | $43.7M | 0.19% | −264,677−11.5% | Reduced |
| Driehaus Capital Management LLC | 2,007,888 | $43.2M | 0.35% | +2,007,888 | New |
| Raymond James Financial Inc | 1,972,536 | $42.5M | 0.01% | +254,688+14.8% | Added |
| Northern Trust Corp | 1,932,856 | $41.6M | 0.01% | −38,326−1.9% | Reduced |
| Royal Bank of Canada | 1,714,821 | $36.9M | 0.01% | +1,615,993+1,635.2% | Added |
| UBS Group AG | 1,704,697 | $36.7M | 0.01% | +207,491+13.9% | Added |
| Charles Schwab Investment Management Inc | 1,683,977 | $36.3M | 0.01% | +42,902+2.6% | Added |
| ArrowMark Colorado Holdings LLC | 1,677,512 | $36.1M | 0.65% | −511,414−23.4% | Reduced |
| Loomis Sayles & Co L P | 1,591,688 | $34.3M | 0.04% | +1,591,688 | New |
| Nuveen, LLC | 1,550,771 | $33.4M | 0.01% | +162,347+11.7% | Added |
| Morgan Stanley | 1,474,710 | $31.8M | 0.00% | +252,633+20.7% | Added |
| Hood River Capital Management LLC | 1,470,273 | $31.7M | 0.44% | +1,470,273 | New |
| Bank of America Corp | 1,383,213 | $29.8M | 0.00% | +794,591+135.0% | Added |
| Silvercrest Asset Management Group LLC | 1,379,635 | $29.7M | 0.20% | +68,675+5.2% | Added |
| ACK Asset Management LLC | 1,337,000 | $28.8M | 3.78% | −281,356−17.4% | Reduced |
| Chescapmanager LLC | 1,327,895 | $28.6M | 4.80% | 00.0% | Unchanged |
| Schroder Investment Management Group | 1,120,605 | $24.1M | 0.02% | −2,066−0.2% | Reduced |
| UBS Asset Management Americas Inc | 1,090,299 | $23.5M | 0.00% | +655,716+150.9% | Added |
| Segall Bryant & Hamill, LLC | 1,089,217 | $23.5M | 0.33% | +377,868+53.1% | Added |
| Jennison Associates LLC | 1,072,089 | $23.1M | 0.01% | +140,222+15.0% | Added |
| Rockefeller Capital Management L.P. | 1,062,358 | $22.9M | 0.05% | +124,121+13.2% | Added |
| Summit Partners Public Asset Management, LLC | 1,046,000 | $22.5M | 0.88% | +150,000+16.7% | Added |
| William Blair Investment Management, LLC | 1,005,847 | $21.7M | 0.06% | −725,544−41.9% | Reduced |
| D. E. Shaw & Co., Inc. | 967,455 | $20.8M | 0.02% | +515,838+114.2% | Added |
| Emerald Advisers, LLC | 965,245 | $20.8M | 0.76% | +85,156+9.7% | Added |
| Victory Capital Management Inc | 958,674 | $20.6M | 0.01% | −46,023−4.6% | Reduced |
| Schwartz Investment Counsel Inc | 954,300 | $20.5M | 0.68% | 00.0% | Unchanged |
| FMR LLC | 946,995 | $20.4M | 0.00% | +625,204+194.3% | Added |
| Pier Capital, LLC | 871,028 | $18.8M | 2.86% | −70,452−7.5% | Reduced |
| JPMorgan Chase & Co | 825,269 | $17.8M | 0.00% | +537,900+187.2% | Added |
| Royce & Associates LP | 790,094 | $17.0M | 0.17% | +121,451+18.2% | Added |
| TCW Group Inc | 731,465 | $15.7M | 0.12% | +731,465 | New |
| Bank of New York Mellon Corp | 669,301 | $14.4M | 0.00% | +1630.0% | Added |
| Franklin Resources Inc | 668,159 | $14.4M | 0.00% | +668,159 | New |
| Goldman Sachs Group Inc | 638,261 | $13.7M | 0.00% | +58,617+10.1% | Added |
| Ensign Peak Advisors, Inc | 601,248 | $12.9M | 0.02% | +105,101+21.2% | Added |
| Troluce Capital Advisors LLC | 600,000 | $12.9M | 6.58% | +600,000 | New |
| Susquehanna International Group, LLP | 563,825 | $12.1M | 0.02% | +229,129+68.5% | Added |
| Gamco Investors, Inc. Et Al | 562,074 | $12.1M | 0.12% | −30,053−5.1% | Reduced |
| FIL Ltd | 560,893 | $12.1M | 0.01% | −250,000−30.8% | Reduced |
| Shannon River Fund Management LLC | 555,377 | $12.0M | 1.84% | +555,377 | New |
| Emerald Mutual Fund Advisers Trust | 553,624 | $11.9M | 0.73% | +46,508+9.2% | Added |
| Allspring Global Investments Holdings, LLC | 556,362 | $11.4M | 0.02% | −39,738−6.7% | Reduced |
| Gabelli Funds LLC | 511,314 | $11.0M | 0.08% | −12,936−2.5% | Reduced |
| Telemark Asset Management, LLC | 500,000 | $10.8M | 1.14% | 00.0% | Unchanged |
| Qube Research & Technologies Ltd | 463,977 | $9.99M | 0.01% | −186,230−28.6% | Reduced |
| Ardsley Advisory Partners LP | 463,220 | $9.97M | 1.63% | +288,220+164.7% | Added |
| Nicholas Investment Partners, LP | 459,864 | $9.90M | 0.88% | +92,608+25.2% | Added |
| Citadel Advisors LLC | 451,474 | $9.72M | 0.01% | −457,778−50.3% | Reduced |
| TD Asset Management Inc | 430,758 | $9.27M | 0.01% | +15,724+3.8% | Added |
| Kingdon Capital Management, L.L.C. | 425,000 | $9.15M | 1.77% | −25,000−5.6% | Reduced |
| Concentric Capital Strategies, LP | 412,460 | $8.88M | 0.50% | +412,460 | New |
| Barclays PLC | 411,509 | $8.86M | 0.00% | +157,969+62.3% | Added |
| Swiss National Bank | 408,800 | $8.80M | 0.01% | +15,600+4.0% | Added |
| Moore Capital Management, LP | 407,413 | $8.77M | 0.18% | +407,413 | New |
| Axiom Investors LLC | 392,685 | $8.45M | 0.07% | +392,685 | New |
| Zacks Investment Management | 379,461 | $8.17M | 0.07% | +379,461 | New |
| SEI Investments Co | 351,039 | $7.56M | 0.01% | +157,300+81.2% | Added |
| Aperture Investors, LLC | 345,000 | $7.43M | 1.00% | −12,367−3.5% | Reduced |
| Verition Fund Management LLC | 335,443 | $7.22M | 0.04% | +134,037+66.6% | Added |
| Rhumbline Advisers | 318,602 | $6.86M | 0.01% | +11,180+3.6% | Added |
| Sona Asset Management (US) LLC | 314,000 | $6.76M | 0.23% | +314,000 | New |
| AQR Capital Management LLC | 312,260 | $6.72M | 0.01% | +113,049+56.7% | Added |
| Essex Investment Management Co LLC | 299,816 | $6.46M | 1.17% | −2,057−0.7% | Reduced |
| Wells Fargo & Company | 299,657 | $6.45M | 0.00% | +8,528+2.9% | Added |
| Schonfeld Strategic Advisors LLC | 278,376 | $5.99M | 0.05% | +29,407+11.8% | Added |
| Rice Hall James & Associates, LLC | 269,823 | $5.81M | 0.31% | −283−0.1% | Reduced |
| Deutsche Bank AG | 264,877 | $5.70M | 0.00% | +3,700+1.4% | Added |
| Ameriprise Financial Inc | 260,205 | $5.60M | 0.00% | +148,596+133.1% | Added |
| Citigroup Inc | 257,101 | $5.54M | 0.00% | +91,236+55.0% | Added |
| Hollow Brook Wealth Management LLC | 255,916 | $5.51M | 1.61% | −826−0.3% | Reduced |
| Legal & General Group Plc | 242,824 | $5.23M | 0.00% | +9,095+3.9% | Added |
| Jane Street Group, LLC | 241,544 | $5.20M | 0.01% | −86,640−26.4% | Reduced |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 240,549 | $5.18M | 0.01% | +216,360+894.5% | Added |
| Sumitomo Mitsui DS Asset Management Company, Ltd | 236,340 | $5.09M | 0.05% | +148,619+169.4% | Added |
| EAM Global Investors LLC | 236,179 | $5.08M | 1.32% | +236,179 | New |
| Envestnet Asset Management Inc | 232,996 | $5.02M | 0.00% | +55,028+30.9% | Added |
| Robeco Schweiz AG | 230,000 | $4.95M | 0.11% | +230,000 | New |
| Alliancebernstein L.P. | 229,462 | $4.94M | 0.00% | +10,132+4.6% | Added |