Security Snapshot

Mirion Technologies, Inc. - Common Stock (MIR) Institutional Ownership

CUSIP: 60471A101

13F Institutional Holders and Ownership History from Q2 2021 to Q1 2026

Latest Period

Q4 2025

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
247,751,721
Price per share
$18.59
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
$18.59
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

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Quick Takeaways

  • MIR - Mirion Technologies, Inc. - Common Stock is tracked under CUSIP 60471A101.
  • 363 institutions reported positions in Q4 2025.
  • 4 significant owners is listed from Schedule 13D/13G reporting.

What Changed

  • Holder count moved from 363 to 25 between Q4 2025 and Q1 2026.
  • Reported value moved from $5,906,855,444 to $52,271,268.

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

Latest holder context comes from 363 institutions filings for Q4 2025.

Open SEC Evidence

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.

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
T. Rowe Price Investment Management, Inc. 6.1% $353,943,064 15,112,855 T. Rowe Price Investment Management, Inc. 31 Dec 2025
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 102% of the company’s total 247,751,721 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. 15% 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. 6.1% 15,112,855 -30% 0.22% $353,944,000
STATE STREET CORP 3.7% 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 2.3% 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 1.2% 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 1.1% 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 0.99% 2,452,579 0.41% $57,439,400
CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.95% 2,344,241 +4.9% 0.01% $54,902,124
AMERIPRISE FINANCIAL INC 0.94% 2,336,310 +36% 0.01% $54,716,381
NORTHERN TRUST CORP 0.94% 2,331,446 -0.78% 0.01% $54,602,466
Driehaus Capital Management LLC 0.93% 2,299,122 +16% 0.37% $53,845,437
ROYAL BANK OF CANADA 0.87% 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 2,811,380 $52,271,268 +$1,654,374 $18.59 25
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

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