Mirion TechnologiesMIR
13F holders, Q2 2025 (June 30)301holders +70
99new positions
30sold out
10famous investors
$21.53avg. 13F price*
At the end of Q2 2025, 301 institutions reported holding Mirion Technologies Inc. (MIR) in their 13F filings, up 70 from Q1 2025. 99 opened new positions and 30 sold out. The largest holders were Vanguard Group Inc. ($511.7M), T. Rowe Price Investment Management, Inc. ($451.2M) and BlackRock, Inc. ($366.3M). 10 famous investors held it, including Leon Cooperman (5.4% of Omega Advisors (Leon Cooperman)'s portfolio), Lee Ainslie (1.8% of Maverick Capital's portfolio) and Mario Gabelli (0.1% of GAMCO Investors's portfolio).
- Company
- Mirion Technologies Inc.
- CUSIP
- 60471A101
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2025 → Q2 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 99 | $365.8M |
| Exits | 30 | $58.7M |
All 13F filers, Q1 2025 → Q2 2025: 31,685,334 shares bought and 15,091,022 shares sold, net +16,594,312 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 301 holders
| Vanguard Group Inc. | 0.01% | Add +2.2% | 23,766,592 | $511.7M |
| T. Rowe Price Investment Management, Inc. | 0.28% | Add +1.2% | 20,957,520 | $451.2M |
| BlackRock, Inc. | 0.01% | Add +5.4% | 17,012,641 | $366.3M |
| Janus Henderson Group PLC | 0.08% | Reduce -7.0% | 7,988,396 | $172.0M |
| Omega Advisors (Leon Cooperman) | 5.39% | Add +1.4% | 7,125,000 | $153.4M |
| Dimensional Fund Advisors LP | 0.03% | Reduce -5.7% | 6,947,380 | $149.6M |
| Brown Advisory Inc. | 0.15% | Reduce -2.9% | 5,400,405 | $116.3M |
| Maverick Capital | 1.75% | Reduce -34.1% | 5,308,038 | $114.3M |
| State Street Corp. | 0.00% | Reduce -0.9% | 5,094,072 | $109.7M |
| Geode Capital Management, LLC | 0.01% | Add +0.0% | 4,739,240 | $102.0M |
| Alyeska Investment Group, L.P. | 0.34% | Add +7.2% | 4,446,853 | $95.7M |
| Swedbank AB | 0.10% | Reduce -23.4% | 4,126,035 | $88.8M |
| Massachusetts Financial Services Co. | 0.03% | New | 3,833,668 | $82.5M |
| American Century Companies Inc. | 0.04% | Reduce -1.7% | 3,373,352 | $72.6M |
| Artemis Investment Management LLP | 0.84% | Add +1.0% | 3,028,968 | $65.2M |
| Corsair Capital Management, L.P. | 12.48% | Reduce -1.5% | 3,025,412 | $65.1M |
| Millennium Management | 0.06% | Add +12.2% | 2,881,947 | $62.0M |
| Invesco Ltd. | 0.01% | Add +713.2% | 2,617,252 | $56.3M |
| Lord, Abbett & Co. LLC | 0.18% | Add +2.5% | 2,459,638 | $53.0M |
| Arrowstreet Capital, Limited Partnership | 0.03% | Reduce -18.2% | 2,281,180 | $49.1M |
| Bornite Capital Management LP | 4.42% | Reduce -0.6% | 2,051,700 | $44.2M |
| Select Equity Group, L.P. | 0.19% | Reduce -11.6% | 2,027,559 | $43.7M |
| Driehaus Capital Management LLC | 0.35% | New | 2,007,888 | $43.2M |
| Raymond James Financial Inc. | 0.01% | Add +14.8% | 1,972,536 | $42.5M |
| Northern Trust Corp. | 0.01% | Reduce -1.9% | 1,932,856 | $41.6M |
| Royal Bank of Canada | 0.01% | Add +1635.2% | 1,714,821 | $36.9M |
| UBS Group AG | 0.01% | Add +13.9% | 1,704,697 | $36.7M |
| Charles Schwab Investment Management Inc. | 0.01% | Add +2.6% | 1,683,977 | $36.3M |
| ArrowMark Colorado Holdings LLC | 0.65% | Reduce -23.4% | 1,677,512 | $36.1M |
| Loomis Sayles & Co. L P | 0.04% | New | 1,591,688 | $34.3M |
| Nuveen, LLC | 0.01% | Add +11.7% | 1,550,771 | $33.4M |
| Morgan Stanley | 0.00% | Add +20.7% | 1,474,710 | $31.8M |
| Hood River Capital Management LLC | 0.44% | New | 1,470,273 | $31.7M |
| Bank of America Corp. | 0.00% | Add +135.0% | 1,383,213 | $29.8M |
| Silvercrest Asset Management Group LLC | 0.20% | Add +5.2% | 1,379,635 | $29.7M |
| ACK Asset Management LLC | 3.78% | Reduce -17.4% | 1,337,000 | $28.8M |
| Chescapmanager LLC | 4.80% | No change | 1,327,895 | $28.6M |
| Schroder Investment Management Group | 0.02% | Reduce -0.2% | 1,120,605 | $24.1M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Add +150.9% | 1,090,299 | $23.5M |
| Segall Bryant & Hamill, LLC | 0.33% | Add +53.1% | 1,089,217 | $23.5M |
| Jennison Associates LLC | 0.01% | Add +15.1% | 1,072,089 | $23.1M |
| Rockefeller Capital Management L.P. | 0.05% | Add +13.2% | 1,062,358 | $22.9M |
| Summit Partners Public Asset Management, LLC | 0.88% | Add +16.7% | 1,046,000 | $22.5M |
| William Blair Investment Management, LLC | 0.06% | Reduce -41.9% | 1,005,847 | $21.7M |
| D. E. Shaw & Co. | 0.02% | Add +114.2% | 967,455 | $20.8M |
| Emerald Advisers, LLC | 0.76% | Add +9.7% | 965,245 | $20.8M |
| Victory Capital Management Inc. | 0.01% | Reduce -4.6% | 958,674 | $20.6M |
| Schwartz Investment Counsel Inc. | 0.68% | No change | 954,300 | $20.5M |
| FMR LLC | 0.00% | Add +194.3% | 946,995 | $20.4M |
| Pier Capital, LLC | 2.86% | Reduce -7.5% | 871,028 | $18.8M |
| JPMorgan Chase & Co. | 0.00% | Add +187.2% | 825,269 | $17.8M |
| Royce & Associates LP | 0.17% | Add +18.2% | 790,094 | $17.0M |
| TCW Group Inc. | 0.12% | New | 731,465 | $15.7M |
| Bank of New York Mellon Corp | 0.00% | Add +0.0% | 669,301 | $14.4M |
| Franklin Resources Inc. | 0.00% | New | 668,159 | $14.4M |
| Goldman Sachs Group Inc. | 0.00% | Add +10.1% | 638,261 | $13.7M |
| Ensign Peak Advisors, Inc | 0.02% | Add +21.2% | 601,248 | $12.9M |
| Troluce Capital Advisors LLC | 6.58% | New | 600,000 | $12.9M |
| Susquehanna International Group, LLP | 0.02% | Add +68.5% | 563,825 | $12.1M |
| GAMCO Investors | 0.12% | Reduce -5.1% | 562,074 | $12.1M |
| FIL Ltd | 0.01% | Reduce -30.8% | 560,893 | $12.1M |
| Shannon River Fund Management LLC | 1.84% | New | 555,377 | $12.0M |
| Emerald Mutual Fund Advisers Trust | 0.73% | Add +9.2% | 553,624 | $11.9M |
| Allspring Global Investments Holdings, LLC | 0.02% | Reduce -6.7% | 556,362 | $11.4M |
| Gabelli Funds LLC | 0.08% | Reduce -2.5% | 511,314 | $11.0M |
| Telemark Asset Management, LLC | 1.14% | No change | 500,000 | $10.8M |
| Qube Research & Technologies Ltd | 0.01% | Reduce -28.6% | 463,977 | $10.0M |
| Ardsley Advisory Partners LP | 1.63% | Add +164.7% | 463,220 | $10.0M |
| Nicholas Investment Partners, LP | 0.99% | Add +25.2% | 459,864 | $9.9M |
| Citadel Advisors | 0.01% | Reduce -50.4% | 451,474 | $9.7M |
| TD Asset Management Inc | 0.01% | Add +3.8% | 430,758 | $9.3M |
| Kingdon Capital Management, L.L.C. | 1.77% | Reduce -5.6% | 425,000 | $9.2M |
| Concentric Capital Strategies, LP | 0.50% | New | 412,460 | $8.9M |
| Barclays PLC | 0.00% | Add +62.3% | 411,509 | $8.9M |
| Swiss National Bank | 0.01% | Add +4.0% | 408,800 | $8.8M |
| Moore Capital Management, LP | 0.19% | New | 407,413 | $8.8M |
| Axiom Investors LLC | 0.07% | New | 392,685 | $8.5M |
| Zacks Investment Management | 0.07% | New | 379,461 | $8.2M |
| Sei Investments Co. | 0.01% | Add +81.2% | 351,039 | $7.6M |
| Aperture Investors, LLC | 1.00% | Reduce -3.5% | 345,000 | $7.4M |
| Verition Fund Management LLC | 0.04% | Add +66.5% | 335,443 | $7.2M |
| Rhumbline Advisers | 0.01% | Add +3.6% | 318,602 | $6.9M |
| Sona Asset Management (us) LLC | 0.51% | New | 314,000 | $6.8M |
| AQR Capital Management | 0.01% | Add +56.8% | 312,260 | $6.7M |
| Essex Investment Management Co. LLC | 1.17% | Reduce -0.7% | 299,816 | $6.5M |
| Wells Fargo & Company | 0.00% | Add +2.9% | 299,657 | $6.5M |
| Schonfeld Strategic Advisors LLC | 0.05% | Add +11.8% | 278,376 | $6.0M |
| Rice Hall James & Associates, LLC | 0.31% | Reduce -0.1% | 269,823 | $5.8M |
| Deutsche Bank AG | 0.00% | Add +1.4% | 264,877 | $5.7M |
| Ameriprise Financial Inc. | 0.00% | Add +133.1% | 260,205 | $5.6M |
| Citigroup Inc. | 0.00% | Add +55.0% | 257,101 | $5.5M |
| Hollow Brook Wealth Management LLC | 1.61% | Reduce -0.3% | 255,916 | $5.5M |
| Legal & General Group Plc | 0.00% | Add +3.9% | 242,824 | $5.2M |
| Jane Street Group, LLC | 0.01% | Reduce -26.4% | 241,544 | $5.2M |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 0.01% | Add +894.5% | 240,549 | $5.2M |
| Sumitomo Mitsui DS Asset Management Company, Ltd | 0.05% | Add +169.4% | 236,340 | $5.1M |
| Global IMC LLC | 1.32% | New | 236,179 | $5.1M |
| Envestnet Asset Management Inc. | 0.00% | Add +30.9% | 232,996 | $5.0M |
| Robeco Schweiz AG | 0.11% | New | 230,000 | $5.0M |
| Alliancebernstein L.P. | 0.00% | Add +4.6% | 229,462 | $4.9M |
"% of holder's portfolio" is MIR's weight in each manager's 13F, not the share of Mirion Technologies Inc. the manager owns.