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 |
|---|---|---|---|---|---|
| T. Rowe Price Investment Management, Inc. | 20,957,520 | $451.2M | 0.28% | +247,131+1.2% | Added |
| Vanguard Group Inc | 23,766,592 | $511.7M | 0.01% | +508,544+2.2% | Added |
| Masters Capital Management LLC | 0 | $0 | 0.00% | −1,000,000−100.0% | Sold out |
| Norges Bank | 0 | $0 | 0.00% | −602,500−100.0% | Sold out |
| Trexquant Investment LP | 0 | $0 | 0.00% | −567,609−100.0% | Sold out |
| Tudor Investment Corp Et Al | 0 | $0 | 0.00% | −430,949−100.0% | Sold out |
| Bastion Asset Management Inc. | 0 | $0 | 0.00% | −326,580−100.0% | Sold out |
| Alberta Investment Management Corp | 0 | $0 | 0.00% | −180,520−100.0% | Sold out |
| Dark Forest Capital Management LP | 0 | $0 | 0.00% | −151,996−100.0% | Sold out |
| HRT Financial LP | 0 | $0 | 0.00% | −145,133−100.0% | Sold out |
| Squarepoint Ops LLC | 0 | $0 | 0.00% | −107,363−100.0% | Sold out |
| Corebridge Financial, Inc. | 0 | $0 | 0.00% | −101,203−100.0% | Sold out |
| Aquatic Capital Management LLC | 0 | $0 | 0.00% | −97,996−100.0% | Sold out |
| First Manhattan Co | 0 | $0 | 0.00% | −76,932−100.0% | Sold out |
| XTX Topco Ltd | 0 | $0 | 0.00% | −69,269−100.0% | Sold out |
| Virginia Retirement Systems Et Al | 0 | $0 | 0.00% | −47,546−100.0% | Sold out |
| Engineers Gate Manager LP | 0 | $0 | 0.00% | −34,303−100.0% | Sold out |
| Campbell & CO Investment Adviser LLC | 0 | $0 | 0.00% | −33,425−100.0% | Sold out |
| PDT Partners, LLC | 0 | $0 | 0.00% | −22,969−100.0% | Sold out |
| Diametric Capital, LP | 0 | $0 | 0.00% | −13,679−100.0% | Sold out |
| Two Sigma Securities, LLC | 0 | $0 | 0.00% | −11,427−100.0% | Sold out |
| Sciencast Management LP | 0 | $0 | 0.00% | −10,508−100.0% | Sold out |
| BI Asset Management Fondsmaeglerselskab A/S | 0 | $0 | 0.00% | −4,676−100.0% | Sold out |
| Quadrant Capital Group LLC | 0 | $0 | 0.00% | −817−100.0% | Sold out |
| Optiver Holding B.V. | 0 | $0 | 0.00% | −736−100.0% | Sold out |
| Global Financial Private Client, LLC | 0 | $0 | 0.00% | −494−100.0% | Sold out |
| Sierra Ocean, LLC | 0 | $0 | 0.00% | −321−100.0% | Sold out |
| Millstone Evans Group, LLC | 0 | $0 | 0.00% | −268−100.0% | Sold out |
| Coldstream Capital Management Inc | 0 | $0 | 0.00% | −213−100.0% | Sold out |
| Amundi | 0 | $0 | 0.00% | −133−100.0% | Sold out |
| Stephens Consulting, LLC | 0 | $0 | 0.00% | −75−100.0% | Sold out |
| Caitong International Asset Management Co., Ltd | 0 | $0 | 0.00% | −43−100.0% | Sold out |
| Lindbrook Capital, LLC | – | – | – | – | Not filed |