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 |
|---|---|---|---|---|---|
| CI Private Wealth, LLC | 0 | $0 | 0.00% | −12,411−100.0% | Sold out |
| Diametric Capital, LP | 0 | $0 | 0.00% | −11,448−100.0% | Sold out |
| Bailard, Inc. | 0 | $0 | 0.00% | −10,348−100.0% | Sold out |
| FORA Capital, LLC | 0 | $0 | 0.00% | −9,436−100.0% | Sold out |
| Verdence Capital Advisors LLC | 0 | $0 | 0.00% | −8,814−100.0% | Sold out |
| Aster Capital Management (DIFC) Ltd | 0 | $0 | 0.00% | −8,070−100.0% | Sold out |
| Torno Capital, LLC | 0 | $0 | 0.00% | −6,410−100.0% | Sold out |
| Walleye Trading LLC | 0 | $0 | 0.00% | −2,463−100.0% | Sold out |
| Advisory Services Network, LLC | 0 | $0 | 0.00% | −1,058−100.0% | Sold out |
| Zazove Associates LLC | 0 | $0 | 0.00% | −1,000−100.0% | Sold out |
| Principal Securities, Inc. | 0 | $0 | 0.00% | −714−100.0% | Sold out |
| Rise Advisors, LLC | 0 | $0 | 0.00% | −579−100.0% | Sold out |
| Optiver Holding B.V. | 0 | $0 | 0.00% | −514−100.0% | Sold out |
| Groupe la Francaise | 0 | $0 | 0.00% | −400−100.0% | Sold out |
| Caitong International Asset Management Co., Ltd | 0 | $0 | 0.00% | −290−100.0% | Sold out |
| Ameriflex Group, Inc. | 0 | $0 | 0.00% | −188−100.0% | Sold out |
| Stone House Investment Management, LLC | 0 | $0 | 0.00% | −90−100.0% | Sold out |
| Wealthspire Advisors, LLC | 0 | $0 | 0.00% | −60−100.0% | Sold out |
| SWAN Capital LLC | 0 | $0 | 0.00% | −50−100.0% | Sold out |
| Tortoise Investment Management, LLC | 0 | $0 | 0.00% | −3−100.0% | Sold out |
| Cloud Capital Management, LLC | 0 | $0 | 0.00% | −39−100.0% | Sold out |
| Wolverine Trading, LLC | – | – | – | – | Not filed |
| CIBC Bancorp USA Inc. | – | – | – | – | Not filed |
| Glenmede Investment Management, LP | – | – | – | – | Not filed |
| Hemington Wealth Management | – | – | – | – | Not filed |