Mirion TechnologiesMIR
13F holders, Q1 2026 (March 31)362holders −3
55new positions
56sold out
10famous investors
$18.60avg. 13F price*
At the end of Q1 2026, 362 institutions reported holding Mirion Technologies Inc. (MIR) in their 13F filings, down 3 from Q4 2025. 55 opened new positions and 56 sold out. The largest holders were BlackRock, Inc. ($703.8M), Vanguard Portfolio Management LLC ($332.9M) and T. Rowe Price Investment Management, Inc. ($271.9M). 10 famous investors held it, including Leon Cooperman (5.1% of Omega Advisors (Leon Cooperman)'s portfolio), Lee Ainslie (0.6% 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 Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 55 | $241.3M |
| Exits | 56 | $257.4M |
All 13F filers, Q4 2025 → Q1 2026: 31,861,733 shares bought and 30,010,575 shares sold, net +1,851,158 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 362 holders
| BlackRock, Inc. | 0.01% | Reduce -0.9% | 37,857,697 | $703.8M |
| Vanguard Portfolio Management LLC | 0.02% | — | 17,905,722 | $332.9M |
| T. Rowe Price Investment Management, Inc. | 0.19% | Reduce -3.2% | 14,627,795 | $271.9M |
| Vanguard Capital Management LLC | 0.00% | — | 10,505,195 | $195.3M |
| State Street Corp. | 0.01% | Add +2.5% | 9,430,017 | $175.3M |
| Omega Advisors (Leon Cooperman) | 5.11% | No change | 8,383,441 | $155.8M |
| Goldman Sachs Group Inc. | 0.02% | Add +40.0% | 7,349,668 | $136.6M |
| FMR LLC | 0.01% | Reduce -22.1% | 6,551,692 | $121.8M |
| Geode Capital Management, LLC | 0.01% | Add +2.6% | 5,940,175 | $110.4M |
| Millennium Management | 0.07% | New | 5,106,801 | $94.9M |
| Dimensional Fund Advisors LP | 0.02% | Add +14.4% | 4,694,288 | $87.2M |
| Bank of New York Mellon Corp | 0.02% | Add +47.4% | 4,536,732 | $84.3M |
| Janus Henderson Group PLC | 0.04% | Reduce -12.1% | 4,043,089 | $75.2M |
| UBS Group AG | 0.01% | Reduce -22.4% | 3,766,842 | $70.0M |
| Swedbank AB | 0.06% | Reduce -7.0% | 3,159,950 | $58.7M |
| American Century Companies Inc. | 0.03% | Add +6.9% | 2,732,762 | $50.8M |
| Alyeska Investment Group, L.P. | 0.14% | Add +76.4% | 2,701,580 | $50.2M |
| Loomis Sayles & Co. L P | 0.07% | Reduce -6.2% | 2,670,228 | $49.6M |
| Maverick Capital | 0.57% | New | 2,649,879 | $49.3M |
| Two Creeks Capital Management, LP | 4.81% | Reduce -16.2% | 2,449,059 | $45.5M |
| JPMorgan Chase & Co. | 0.00% | Add +56.8% | 2,619,120 | $45.4M |
| Northern Trust Corp. | 0.01% | Add +1.5% | 2,366,237 | $44.0M |
| Invesco Ltd. | 0.00% | Reduce -26.0% | 2,294,250 | $42.7M |
| Morgan Stanley | 0.00% | Add +9.0% | 2,285,068 | $42.5M |
| Charles Schwab Investment Management Inc. | 0.01% | Reduce -2.9% | 2,277,245 | $42.3M |
| TCW Group Inc. | 0.31% | Reduce -8.7% | 2,238,426 | $41.6M |
| Alliancebernstein L.P. | 0.01% | Add +415.9% | 1,653,429 | $38.7M |
| Franklin Resources Inc. | 0.01% | Add +6.3% | 1,996,144 | $37.1M |
| Royal Bank of Canada | 0.01% | Reduce -8.7% | 1,961,404 | $36.5M |
| Nuveen, LLC | 0.01% | Reduce -3.1% | 1,949,992 | $36.3M |
| Conestoga Capital Advisors, LLC | 0.68% | Reduce -5.6% | 1,831,019 | $34.0M |
| Citadel Advisors | 0.02% | Add +12.5% | 1,823,252 | $33.9M |
| Vanguard Fiduciary Trust Co. | 0.01% | — | 1,694,538 | $31.5M |
| Chescapmanager LLC | 4.93% | No change | 1,659,137 | $30.8M |
| Massachusetts Financial Services Co. | 0.01% | Reduce -56.6% | 1,589,259 | $29.5M |
| Troluce Capital Advisors LLC | 3.02% | Add +76.5% | 1,500,000 | $27.9M |
| Rockefeller Capital Management L.P. | 0.05% | Add +22.3% | 1,392,724 | $25.9M |
| Emerald Advisers, LLC | 0.81% | Add +21.5% | 1,381,574 | $25.7M |
| Stephens Investment Management Group LLC | 0.35% | Add +69.8% | 1,374,876 | $25.6M |
| Bank of America Corp. | 0.00% | Reduce -0.3% | 1,355,298 | $25.2M |
| Davidson Kempner Capital Management LP | 0.67% | Add +41.6% | 1,314,819 | $24.4M |
| Brown Advisory Inc. | 0.04% | Reduce -19.4% | 1,300,073 | $24.2M |
| TimesSquare Capital Management, LLC | 0.41% | Add +33.8% | 1,294,165 | $24.1M |
| Ameriprise Financial Inc. | 0.01% | Reduce -44.8% | 1,289,690 | $24.0M |
| Daiwa Securities Group Inc. | 0.07% | Add +2490.4% | 1,217,497 | $22.6M |
| Baron Capital (BAMCO) | 0.07% | Add +86.7% | 1,213,748 | $22.6M |
| Principal Financial Group Inc. | 0.01% | Reduce -30.0% | 1,196,049 | $22.2M |
| Voya Investment Management LLC | 0.03% | Add +32.8% | 1,168,228 | $21.7M |
| Congress Asset Management Co. | 0.15% | New | 1,114,061 | $20.7M |
| Segall Bryant & Hamill, LLC | 0.30% | Reduce -4.9% | 1,111,874 | $20.7M |
| BNP Paribas Financial Markets | 0.01% | Add +22.9% | 1,111,397 | $20.7M |
| Allspring Global Investments Holdings, LLC | 0.03% | Add +2.8% | 1,059,030 | $19.8M |
| Schroder Investment Management Group | 0.02% | Add +12.4% | 1,136,000 | $19.7M |
| Select Equity Group, L.P. | 0.10% | Add +37.3% | 1,055,468 | $19.6M |
| Citigroup Inc. | 0.01% | Add +177.3% | 1,048,104 | $19.5M |
| Raymond James Financial Inc. | 0.01% | Reduce -29.9% | 1,075,652 | $18.9M |
| Corsair Capital Management, L.P. | 2.71% | No change | 982,419 | $18.3M |
| Alta Park Capital, LP | 2.92% | Add +73.7% | 977,138 | $18.2M |
| Jennison Associates LLC | 0.01% | Reduce -5.0% | 942,696 | $17.5M |
| Lord, Abbett & Co. LLC | 0.06% | Reduce -56.3% | 937,044 | $17.4M |
| Fred Alger Management, LLC | 0.07% | New | 909,606 | $16.9M |
| Public Sector Pension Investment Board | 0.05% | Add +2.0% | 875,290 | $16.3M |
| Emerald Mutual Fund Advisers Trust | 0.79% | Add +24.0% | 873,466 | $16.2M |
| Neuberger Berman Group LLC | 0.01% | Add +50.9% | 856,389 | $15.9M |
| Schwartz Investment Counsel Inc. | 0.56% | Add +7.5% | 854,300 | $15.9M |
| Wellington Management Group LLP | 0.00% | Add +236.8% | 837,812 | $15.6M |
| Federated Hermes, Inc. | 0.02% | Reduce -3.8% | 816,447 | $15.2M |
| Tidal Investments LLC | 0.04% | Add +92.3% | 775,013 | $14.4M |
| Nomura Holdings Inc. | 0.12% | Add +0.5% | 764,560 | $14.2M |
| Oberweis Asset Management Inc./ | 0.41% | Add +22.4% | 744,267 | $13.8M |
| Nomura Asset Management International Inc. | 0.02% | Reduce -14.9% | 727,278 | $13.5M |
| Pier Capital, LLC | 2.16% | Reduce -1.9% | 703,811 | $13.1M |
| Silvercrest Asset Management Group LLC | 0.09% | Reduce -16.9% | 680,355 | $12.6M |
| Wells Fargo & Company | 0.00% | Reduce -22.0% | 678,437 | $12.6M |
| Rhumbline Advisers | 0.01% | Add +2.4% | 634,415 | $11.8M |
| Ensign Peak Advisors, Inc | 0.02% | Reduce -2.8% | 631,418 | $11.7M |
| Deutsche Bank AG | 0.00% | Add +6.0% | 613,048 | $11.4M |
| ArrowMark Colorado Holdings LLC | 0.28% | Reduce -19.7% | 575,155 | $10.7M |
| Legal & General Group Plc | 0.00% | Reduce -8.8% | 555,910 | $10.3M |
| GAMCO Investors | 0.10% | Add +0.5% | 544,662 | $10.1M |
| Artemis Investment Management LLP | 0.11% | Reduce -72.7% | 539,134 | $10.0M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Add +14.3% | 507,186 | $9.4M |
| Axiom Investors LLC | 0.10% | Reduce -34.6% | 472,036 | $8.8M |
| D. E. Shaw & Co. | 0.01% | Reduce -25.6% | 468,137 | $8.7M |
| Swiss National Bank | 0.01% | Add +0.4% | 465,900 | $8.7M |
| Peregrine Capital Management LLC | 0.32% | Add +14.7% | 462,383 | $8.6M |
| Sei Investments Co. | 0.01% | Add +0.4% | 458,359 | $8.5M |
| Aberdeen Group plc | 0.01% | New | 456,462 | $8.5M |
| Royce & Associates LP | 0.08% | Add +53.7% | 451,755 | $8.4M |
| Exchange Traded Concepts, LLC | 0.06% | Add +38.5% | 406,982 | $7.6M |
| Bastion Asset Management Inc. | 2.22% | New | 389,158 | $7.3M |
| Zacks Investment Management | 0.06% | Reduce -3.3% | 388,877 | $7.2M |
| T. Rowe Price Associates Inc. | 0.00% | Reduce -54.1% | 382,788 | $7.1M |
| Bank of Nova Scotia | 0.01% | Reduce -2.8% | 380,186 | $7.1M |
| Mirova | 0.28% | New | 368,380 | $6.8M |
| Gabelli Funds LLC | 0.05% | Reduce -14.5% | 367,980 | $6.8M |
| Sumitomo Mitsui DS Asset Management Company, Ltd | 0.05% | Reduce -9.0% | 363,598 | $6.8M |
| Bridgewater Associates | 0.03% | Reduce -28.2% | 351,785 | $6.5M |
| Burkehill Global Management, LP | 0.34% | No change | 350,000 | $6.5M |
| TD Asset Management Inc | 0.01% | Add +0.0% | 348,096 | $6.5M |
"% of holder's portfolio" is MIR's weight in each manager's 13F, not the share of Mirion Technologies Inc. the manager owns.