Latest Period
Q4 2025
Security Snapshot
Mirion Technologies, Inc. - Common Stock (MIR) Institutional Ownership
CUSIP: 60471A101
13F Institutional Holders and Ownership History from Q2 2021 to Q1 2026
Institutions Reporting
363
Shares (Excl. Options)
252,154,627
Price
$23.42
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- Type / Class
- Equity / Common Stock
- Symbol
- MIR on NYSE
- Shares outstanding
- 245,072,565
- Price per share
- $19.00
- All holders as of 31 Dec 2025
- Q4 2025
- Total 13F shares
- 252,154,627
- Total reported value
- $5,906,855,444
- % of total 13F portfolios
- 0.01%
- Share change
- -4,421,872
- Value change
- -$101,887,022
- Number of holders
- 363
- Price from insider filings
- $19.00
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors
Quick Takeaways
- MIR - Mirion Technologies, Inc. - Common Stock is tracked under CUSIP 60471A101.
- 363 institutions reported positions in Q4 2025.
- 6 significant owners is listed from Schedule 13D/13G reporting.
What Changed
- Holder count moved from 363 to 148 between Q4 2025 and Q1 2026.
- Reported value moved from $5,906,855,444 to $1,300,297,545.
Why This Matters
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Source Evidence
Source: SEC Form 13F
Open SEC Evidence
Latest holder context comes from 363 institutions filings for Q4 2025.
Investment Quick Answers
What is CUSIP 60471A101?
CUSIP 60471A101 identifies MIR - Mirion Technologies, Inc. - Common Stock in SEC 13F datasets.
Where can I see the latest institutional holders?
Review the Q4 2025 holders report and the ownership history table below.
Next ownership checks
Use the next link that matches the question you still need to answer about this security.
- Latest 13F filings when you want to inspect fresh institutional portfolio moves.
- Latest Schedule 13D/13G reports when you need large-owner changes outside the 13F cycle.
- All institutional ownership pages to compare this security with other holder-history pages.
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 60471A101:
Significant Owners of Mirion Technologies, Inc. - Common Stock (MIR) based on Schedule 13D/G filings
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| BlackRock, Inc. | 15% | $786,972,923 | 35,690,382 | BlackRock, Inc. | 30 Sep 2025 | |||
| VANGUARD PORTFOLIO MANAGEMENT LLC | 7.4% | $336,832,173 | 18,118,998 | Vanguard Portfolio Management | 31 Mar 2026 | |||
| T. Rowe Price Investment Management, Inc. | 6.1% | $353,943,064 | 15,112,855 | T. Rowe Price Investment Management, Inc. | 31 Dec 2025 | |||
| VANGUARD CAPITAL MANAGEMENT LLC | 5% | $229,161,718 | 12,327,150 | Vanguard Capital Management | 31 Mar 2026 | |||
| KUWAIT INVESTMENT AUTHORITY ON BEHALF OF THE GOVT OF KUWAIT | 4.1% | $238,218,661 | 10,171,591 | Kuwait Investment Authority, acting for and on behalf of the Government of the State of Kuwait (KIA) | 29 Jul 2022 | |||
| GSAM Holdings LLC | 2.3% | $77,448,166 | 5,187,419 | GOLDMAN SACHS GROUP INC | 17 Dec 2024 |
As of 31 Dec 2025, 363 institutional investors reported holding 252,154,627 shares of Mirion Technologies, Inc. - Common Stock (MIR). This represents 103% of the company’s total 245,072,565 outstanding shares.
Top 25 Institutional Shareholders
The largest institutional shareholders of Mirion Technologies, Inc. - Common Stock (MIR) together control 70% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 16% | 38,199,968 | +4.9% | 0.02% | $894,643,252 |
| VANGUARD GROUP INC | 12% | 30,346,328 | -0.24% | 0.01% | $710,711,002 |
| T. Rowe Price Investment Management, Inc. | 6.2% | 15,112,855 | -30% | 0.22% | $353,944,000 |
| STATE STREET CORP | 3.8% | 9,198,795 | +4.3% | 0.01% | $215,435,779 |
| FMR LLC | 3.4% | 8,414,300 | -7.3% | 0.01% | $197,062,906 |
| COOPERMAN LEON G | 3.4% | 8,383,441 | 0% | 6.5% | $196,340,188 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.4% | 5,786,596 | +2.8% | 0.01% | $135,545,437 |
| GOLDMAN SACHS GROUP INC | 2.1% | 5,248,506 | +3.8% | 0.02% | $122,920,011 |
| UBS Group AG | 2% | 4,852,587 | +1.2% | 0.02% | $113,647,588 |
| JANUS HENDERSON GROUP PLC | 1.9% | 4,596,949 | -40% | 0.05% | $107,660,006 |
| DIMENSIONAL FUND ADVISORS LP | 1.7% | 4,102,558 | -34% | 0.02% | $96,087,235 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 1.5% | 3,663,479 | -32% | 0.03% | $85,798,680 |
| Swedbank AB | 1.4% | 3,398,200 | -15% | 0.08% | $79,585,844 |
| Invesco Ltd. | 1.3% | 3,101,120 | +12% | 0.01% | $72,628,231 |
| Bank of New York Mellon Corp | 1.3% | 3,076,945 | +126% | 0.01% | $72,062,067 |
| Two Creeks Capital Management, LP | 1.2% | 2,923,802 | -19% | 5.6% | $68,475,443 |
| LOOMIS SAYLES & CO L P | 1.2% | 2,845,619 | +3% | 0.08% | $66,644,397 |
| Hood River Capital Management LLC | 1.1% | 2,780,137 | +0.61% | 0.71% | $65,110,809 |
| AMERICAN CENTURY COMPANIES INC | 1% | 2,556,724 | -21% | 0.03% | $59,878,517 |
| TCW GROUP INC | 1% | 2,452,579 | 0.41% | $57,439,400 | |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 0.96% | 2,344,241 | +4.9% | 0.01% | $54,902,124 |
| AMERIPRISE FINANCIAL INC | 0.95% | 2,336,310 | +36% | 0.01% | $54,716,381 |
| NORTHERN TRUST CORP | 0.95% | 2,331,446 | -0.78% | 0.01% | $54,602,466 |
| Driehaus Capital Management LLC | 0.94% | 2,299,122 | +16% | 0.37% | $53,845,437 |
| ROYAL BANK OF CANADA | 0.88% | 2,147,984 | -7% | 0.01% | $50,306,000 |
Institutional Holders of Mirion Technologies, Inc. - Common Stock (MIR) across Reporting Periods
| Period | Reported Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 69,941,392 | $1,300,297,545 | +$15,917,462 | $18.59 | 148 |
| 2025 Q4 | 252,154,627 | $5,906,855,444 | -$101,887,022 | $23.42 | 363 |
| 2025 Q3 | 255,032,548 | $5,930,723,272 | +$1,121,022,486 | $23.26 | 338 |
| 2025 Q2 | 207,351,906 | $4,463,739,712 | +$390,863,249 | $21.53 | 300 |
| 2025 Q1 | 190,143,613 | $2,758,422,550 | -$73,903,530 | $14.50 | 228 |
| 2024 Q4 | 193,940,415 | $3,383,987,298 | -$173,575,773 | $17.45 | 221 |
| 2024 Q3 | 204,602,306 | $2,264,947,633 | +$83,120,387 | $11.07 | 172 |
| 2024 Q2 | 197,272,750 | $2,118,677,881 | +$90,798,200 | $10.74 | 154 |
| 2024 Q1 | 188,536,766 | $2,143,665,971 | +$20,871,393 | $11.37 | 139 |
| 2023 Q4 | 187,870,653 | $1,925,693,855 | +$7,764,495 | $10.25 | 124 |
| 2023 Q3 | 187,912,198 | $1,403,706,732 | +$61,043,099 | $7.47 | 124 |
| 2023 Q2 | 174,773,821 | $1,476,846,436 | +$77,018,708 | $8.45 | 96 |
| 2023 Q1 | 170,036,490 | $1,452,110,276 | +$150,571,811 | $8.54 | 115 |
| 2022 Q4 | 153,291,192 | $1,013,210,591 | -$120,248,912 | $6.61 | 118 |
| 2022 Q3 | 170,652,341 | $1,274,773,618 | +$81,805,780 | $7.47 | 119 |
| 2022 Q2 | 160,031,240 | $921,771,417 | +$53,869,755 | $5.76 | 112 |
| 2022 Q1 | 148,701,807 | $1,200,015,627 | +$16,144,772 | $8.07 | 106 |
| 2021 Q4 | 144,900,158 | $1,517,510,036 | +$1,510,417,095 | $10.47 | 93 |
| 2021 Q3 | 1,606,935 | $16,422,440 | +$16,402,000 | $10.22 | 4 |
| 2021 Q2 | 2,000 | $20,800 | +$20,800 | $10.40 | 1 |