Latest Period
Q1 2026
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
359
Shares (Excl. Options)
253,427,747
Price
$18.59
Save this security page for your next review
Keep this CUSIP in your watchlists so you can revisit quarter changes from one place. If you create an account from here, we will bring you back after verification.
- Security type / class
- Equity / Common Stock
- Symbol
- MIR on NYSE
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 253,427,747
- Total 13F value
- $4,713,439,372
- Portfolio coverage rank
- 0%
- Share change
- +1,492,950
- Value change
- -$20,374,108
- Number of holders
- 359
- Shares outstanding
- 245,072,565
- SEC-reported price per share
- $18.47
- Insider filing price
- $18.47
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- MIR - Mirion Technologies, Inc. - Common Stock is tracked under CUSIP 60471A101.
- 359 institutions reported positions in Q1 2026.
- 6 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 364 to 359 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $5,906,878,302 to $4,713,439,372.
Research use
- 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.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 359 institutions filings for Q1 2026.
Security key
60471A101
Latest holder period
Q1 2026
13F holders
359
13D/G owners
6
CIK / CUSIP context first
Open Q1 2026 holders
MIR full holder history
Mirion Technologies, Inc. SEC filings
Mirion Technologies, Inc. company facts
Mirion Technologies, Inc. insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 60471A101:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
6
Security
MIR
| 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 Mar 2026, 359 institutional investors reported holding 253,427,747 shares of Mirion Technologies, Inc. - Common Stock (MIR). This represents 103% of the company’s total 245,072,565 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
69%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 15% | 37,857,697 | -0.9% | 0.01% | $703,774,594 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 7.3% | 17,905,722 | 0% | 0.02% | $332,867,372 |
| T. Rowe Price Investment Management, Inc. | 6% | 14,627,795 | -3.2% | 0.19% | $271,931,000 |
| VANGUARD CAPITAL MANAGEMENT LLC | 4.3% | 10,505,195 | 0% | 0% | $195,291,575 |
| STATE STREET CORP | 3.8% | 9,430,017 | +2.5% | 0.01% | $175,304,016 |
| COOPERMAN LEON G | 3.4% | 8,383,441 | 0% | 5.1% | $155,848,168 |
| GOLDMAN SACHS GROUP INC | 3% | 7,349,668 | +40% | 0.02% | $136,630,327 |
| FMR LLC | 2.7% | 6,551,692 | -22% | 0.01% | $121,795,956 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.4% | 5,940,175 | +2.7% | 0.01% | $110,449,172 |
| MILLENNIUM MANAGEMENT LLC | 2.1% | 5,106,801 | 0.07% | $94,935,431 | |
| DIMENSIONAL FUND ADVISORS LP | 1.9% | 4,694,288 | +14% | 0.02% | $87,240,303 |
| Bank of New York Mellon Corp | 1.9% | 4,536,732 | +47% | 0.02% | $84,337,841 |
| JANUS HENDERSON GROUP PLC | 1.6% | 4,043,089 | -12% | 0.04% | $75,163,723 |
| UBS Group AG | 1.5% | 3,766,842 | -22% | 0.01% | $70,025,592 |
| Swedbank AB | 1.3% | 3,159,950 | -7% | 0.06% | $58,743,471 |
| AMERICAN CENTURY COMPANIES INC | 1.1% | 2,732,762 | +6.9% | 0.03% | $50,802,086 |
| Alyeska Investment Group, L.P. | 1.1% | 2,701,580 | +76% | 0.14% | $50,222,372 |
| LOOMIS SAYLES & CO L P | 1.1% | 2,670,228 | -6.2% | 0.07% | $49,639,539 |
| MAVERICK CAPITAL LTD | 1.1% | 2,649,879 | 0.57% | $49,261,251 | |
| JPMORGAN CHASE & CO | 1.1% | 2,619,120 | +57% | 0% | $45,363,172 |
| Two Creeks Capital Management, LP | 1% | 2,449,059 | -16% | 4.8% | $45,528,007 |
| NORTHERN TRUST CORP | 0.97% | 2,366,237 | +1.5% | 0.01% | $43,988,346 |
| Invesco Ltd. | 0.94% | 2,294,250 | -26% | 0.01% | $42,650,108 |
| MORGAN STANLEY | 0.93% | 2,285,068 | +9% | 0% | $42,479,436 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 0.93% | 2,277,245 | -2.9% | 0.01% | $42,333,985 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
20
Latest
Q1 2026
Rows shown
1-20 of 20
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 253,427,747 | $4,713,439,372 | -$20,374,108 | $18.59 | 359 |
| 2025 Q4 | 252,155,603 | $5,906,878,302 | -$101,886,999 | $23.42 | 364 |
| 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 |