Security key
60471A101
Mirion Technologies, Inc. - Common Stock (MIR)
CUSIP: 60471A101
Q3 2025 13F Holders as of 30 Sep 2025
- Security type / class
- Equity / Common Stock
- Total 13F shares
- 255,032,548
- Total 13F value
- $5,930,723,272
- Share change
- +47,604,839
- Put/Call ratio
- 35%
- SEC-reported price per share
- $23.26
- Number of holders
- 338
- Value change
- +$1,121,022,486
- Number of buys
- 215
- Number of sells
- 138
- Shares outstanding
- 245,072,565
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q3 2025
Institutions
338
Top holders
10
MIR full security history
Ownership snapshot
Full 13F holder table
Mirion Technologies, Inc. SEC filings
Mirion Technologies, Inc. company facts
Broader feeds
Ownership snapshot
Top reported holders of MIR - Mirion Technologies, Inc. - Common Stock (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
BlackRock, Inc.
Disclosed value leader
BlackRock, Inc.
Comparable rows
15/15
Latest evidence
30 Sep 2025
13D/G
13F
Lead comparable stake: 15%
13D/G row: BlackRock, Inc.
Showing 1-6 of 15 holder rows.
Quick read
BlackRock, Inc. leads the comparable SEC ownership view at 15%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens BlackRock, Inc.'s linked filing trail.
Comparable ownership
Top 5
BlackRock, Inc.
15%
KUWAIT INVESTMENT AUTHORITY ON BE...
4.1%
GSAM Holdings LLC
2.3%
VANGUARD GROUP INC
9.7%
T. Rowe Price Investment Manageme...
8.6%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BlackRock, Inc. |
13D/G
13F
Company
|
15%
|
$786,972,923
35,690,382 shares
|
$0 | 30 Sep 2025 |
| KUWAIT INVESTMENT AUTHORITY ON BEHALF OF THE GOVT OF KUWAIT |
13D/G
Kuwait Investment Authority, acting for and on behalf of the Government of the State of Kuwait (KIA)
|
4.1%
|
$238,218,661
10,171,591 shares
|
$0 | 29 Jul 2022 |
| GSAM Holdings LLC |
13D/G
GOLDMAN SACHS GROUP INC
|
2.3%
|
$77,448,166
5,187,419 shares
|
$0 | 17 Dec 2024 |
| VANGUARD GROUP INC |
13F
Company
|
9.7%
|
$511,694,725
23,766,592 shares
|
— | 30 Jun 2025 |
| T. Rowe Price Investment Management, Inc. |
13F
Company
|
8.6%
|
$451,216,000
20,957,520 shares
|
— | 30 Jun 2025 |
| Janus Henderson Group Ltd. |
13F
Company
|
3.3%
|
$171,989,712
7,988,396 shares
|
— | 30 Jun 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q3 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
338
Shares
255,032,548
Rows available
338
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q3 2025 vs Q2 2025 Across Filers
Q2 2025 holders
300
Q3 2025 holders
338
Holder diff
38
| Investor | Q2 2025 Shares | Q3 2025 Shares | Share Diff | Share Chg % | Q2 2025 value | Q3 2025 value | Value change | Value Chg % |
|---|