Mirion TechnologiesMIR
13F holders, Q2 2026 (June 30)351holders −11
55new positions
66sold out
10famous investors
$17.92avg. 13F price*
At the end of Q2 2026, 351 institutions reported holding Mirion Technologies Inc. (MIR) in their 13F filings, down 11 from Q1 2026. 55 opened new positions and 66 sold out. The largest holders were BlackRock, Inc. ($686.0M), Vanguard Portfolio Management LLC ($326.0M) and T. Rowe Price Investment Management, Inc. ($256.2M). 10 famous investors held it, including Leon Cooperman (4.2% of Omega Advisors (Leon Cooperman)'s portfolio), Lee Ainslie (0.8% of Maverick Capital's portfolio) and Ron Baron (0.1% of Baron Capital (BAMCO)'s portfolio).
- Company
- Mirion Technologies Inc.
- CUSIP
- 60471A101
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2026 → Q2 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 55 | $104.4M |
| Exits | 66 | $188.0M |
All 13F filers, Q1 2026 → Q2 2026: 41,140,232 shares bought and 32,718,772 shares sold, net +8,421,460 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 351 holders
| BlackRock, Inc. | 0.01% | Add +1.1% | 38,262,307 | $686.0M |
| Vanguard Portfolio Management LLC | 0.01% | Add +1.5% | 18,179,850 | $326.0M |
| T. Rowe Price Investment Management, Inc. | 0.17% | Reduce -2.3% | 14,288,075 | $256.2M |
| Vanguard Capital Management LLC | 0.00% | Add +1.0% | 10,613,869 | $190.3M |
| Goldman Sachs Group Inc. | 0.02% | Add +41.6% | 10,406,605 | $186.6M |
| State Street Corp. | 0.01% | Add +5.2% | 9,923,609 | $177.9M |
| Alyeska Investment Group, L.P. | 0.44% | Add +252.9% | 9,534,955 | $171.0M |
| Omega Advisors (Leon Cooperman) | 4.24% | No change | 8,383,441 | $150.3M |
| FMR LLC | 0.01% | Add +11.9% | 7,329,386 | $131.4M |
| Congress Asset Management Co. | 0.74% | Add +500.1% | 6,685,434 | $119.9M |
| Geode Capital Management, LLC | 0.01% | Add +5.7% | 6,280,048 | $112.6M |
| Maverick Capital | 0.85% | Add +97.9% | 5,245,039 | $94.0M |
| Dimensional Fund Advisors LP | 0.02% | Add +3.5% | 4,859,755 | $87.1M |
| Jupiter Topco LLC | 0.03% | — | 4,114,766 | $73.8M |
| Baron Capital (BAMCO) | 0.11% | Add +221.8% | 3,906,083 | $70.0M |
| Morgan Stanley | 0.00% | Add +70.5% | 3,896,754 | $69.9M |
| Neuberger Berman Group LLC | 0.04% | Add +273.6% | 3,199,539 | $57.4M |
| American Century Companies Inc. | 0.03% | Add +16.2% | 3,176,241 | $57.0M |
| Invesco Ltd. | 0.00% | Add +20.7% | 2,769,589 | $49.7M |
| UBS Group AG | 0.01% | Reduce -28.7% | 2,686,713 | $48.2M |
| Northern Trust Corp. | 0.01% | Add +9.3% | 2,586,059 | $46.4M |
| JPMorgan Chase & Co. | 0.00% | Reduce -0.5% | 2,606,507 | $45.7M |
| Swedbank AB | 0.04% | Reduce -19.9% | 2,531,200 | $45.4M |
| Loomis Sayles & Co. L P | 0.06% | Reduce -5.4% | 2,525,188 | $45.3M |
| Charles Schwab Investment Management Inc. | 0.01% | Add +7.5% | 2,447,222 | $43.9M |
| TCW Group Inc. | 0.27% | Add +0.8% | 2,255,645 | $40.4M |
| Nuveen, LLC | 0.01% | Add +8.2% | 2,109,181 | $37.8M |
| Royal Bank of Canada | 0.01% | Reduce -9.1% | 1,782,618 | $32.0M |
| Vanguard Fiduciary Trust Co. | 0.01% | Add +1.7% | 1,723,956 | $30.9M |
| Stephens Investment Management Group LLC | 0.32% | Add +22.1% | 1,678,373 | $30.1M |
| Chescapmanager LLC | 3.86% | No change | 1,659,137 | $29.7M |
| Davidson Kempner Capital Management LP | 0.71% | Add +23.2% | 1,619,998 | $29.0M |
| Select Equity Group, L.P. | 0.15% | Add +49.3% | 1,576,023 | $28.3M |
| Schroder Investment Management Group | 0.02% | Add +40.4% | 1,594,840 | $27.8M |
| Troluce Capital Advisors LLC | 10.34% | Add +2.6% | 1,539,212 | $27.6M |
| Rockefeller Capital Management L.P. | 0.04% | Add +5.3% | 1,466,144 | $26.3M |
| TimesSquare Capital Management, LLC | 0.37% | Add +8.2% | 1,400,642 | $25.1M |
| Bank of New York Mellon Corp | 0.00% | Reduce -69.5% | 1,381,674 | $24.8M |
| Emerald Advisers, LLC | 0.58% | Reduce -1.2% | 1,364,780 | $24.5M |
| Conestoga Capital Advisors, LLC | 0.49% | Reduce -31.8% | 1,248,061 | $22.4M |
| Raymond James Financial Inc. | 0.01% | Add +11.3% | 1,196,716 | $21.5M |
| Principal Financial Group Inc. | 0.01% | Reduce -0.2% | 1,194,106 | $21.4M |
| Royal London Asset Management Ltd. | 0.04% | New | 1,176,241 | $21.1M |
| Bank of America Corp. | 0.00% | Reduce -14.6% | 1,158,094 | $20.8M |
| Segall Bryant & Hamill, LLC | 0.24% | Add +1.7% | 1,131,124 | $20.3M |
| Wellington Management Group LLP | 0.00% | Add +31.2% | 1,098,987 | $19.7M |
| Clearbridge Investments, LLC | 0.02% | New | 1,096,729 | $19.7M |
| Ameriprise Financial Inc. | 0.00% | Reduce -22.3% | 1,002,284 | $18.0M |
| Millennium Management | 0.01% | Reduce -80.6% | 991,741 | $17.8M |
| Jennison Associates LLC | 0.01% | Reduce -5.9% | 887,170 | $15.9M |
| Franklin Resources Inc. | 0.00% | Reduce -55.7% | 884,482 | $15.9M |
| Emerald Mutual Fund Advisers Trust | 0.55% | No change | 873,466 | $15.7M |
| Corsair Capital Management, L.P. | 1.96% | Reduce -11.7% | 867,670 | $15.6M |
| Sei Investments Co. | 0.01% | Add +85.3% | 849,475 | $15.2M |
| Allspring Global Investments Holdings, LLC | 0.02% | Reduce -20.0% | 846,790 | $15.2M |
| Tidal Investments LLC | 0.04% | Add +8.5% | 840,683 | $15.1M |
| Public Sector Pension Investment Board | 0.04% | Reduce -4.0% | 840,519 | $15.1M |
| Silvercrest Asset Management Group LLC | 0.10% | Add +19.5% | 813,203 | $14.6M |
| Federated Hermes, Inc. | 0.02% | Reduce -2.3% | 797,538 | $14.3M |
| Massachusetts Financial Services Co. | 0.00% | Reduce -52.1% | 760,985 | $13.6M |
| Wells Fargo & Company | 0.00% | Add +5.2% | 713,358 | $12.8M |
| Nomura Holdings Inc. | 0.05% | Reduce -7.2% | 709,604 | $12.7M |
| Pier Capital, LLC | 1.65% | Reduce -1.1% | 696,047 | $12.5M |
| Deutsche Bank AG | 0.00% | Add +11.7% | 684,849 | $12.3M |
| Point72 Asset Management | 0.02% | Add +288.8% | 677,509 | $12.1M |
| Osaic Holdings, Inc. | 0.01% | Add +262.3% | 670,489 | $12.0M |
| Aberdeen Group plc | 0.02% | Add +37.5% | 627,585 | $11.3M |
| ExodusPoint Capital Management, LP | 0.10% | New | 605,134 | $10.9M |
| Nissay Asset Management Corp. /Japan | 0.05% | New | 599,278 | $10.7M |
| Citigroup Inc. | 0.01% | Reduce -42.9% | 598,776 | $10.7M |
| ArrowMark Colorado Holdings LLC | 0.44% | Add +2.3% | 588,240 | $10.5M |
| WCM Investment Management, LLC | 0.02% | New | 591,279 | $10.3M |
| Schwartz Investment Counsel Inc. | 0.34% | Reduce -32.8% | 573,910 | $10.3M |
| Rhumbline Advisers | 0.01% | Reduce -10.4% | 568,321 | $10.2M |
| Legal & General Group Plc | 0.00% | Reduce -2.4% | 542,835 | $9.7M |
| GAMCO Investors | 0.09% | Reduce -1.7% | 535,270 | $9.6M |
| Peregrine Capital Management LLC | 0.29% | Add +8.8% | 502,843 | $9.0M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Reduce -5.3% | 480,488 | $8.6M |
| Swiss National Bank | 0.00% | No change | 465,900 | $8.4M |
| BNP Paribas Financial Markets | 0.00% | Reduce -59.4% | 450,934 | $8.1M |
| Robeco Schweiz AG | 0.12% | Add +84.3% | 424,000 | $7.6M |
| T. Rowe Price Associates Inc. | 0.00% | Add +10.0% | 421,193 | $7.6M |
| Exchange Traded Concepts, LLC | 0.04% | Add +3.3% | 420,398 | $7.5M |
| Montanaro Asset Management Ltd | 2.37% | Add +37.1% | 418,646 | $7.5M |
| D. E. Shaw & Co. | 0.00% | Reduce -14.5% | 400,454 | $7.2M |
| Zevenbergen Capital Investments LLC | 0.16% | Add +22.7% | 400,300 | $7.2M |
| Lazard Asset Management LLC | 0.01% | Add +21.6% | 392,003 | $7.0M |
| TD Asset Management Inc | 0.01% | Add +12.0% | 389,798 | $7.0M |
| Envestnet Asset Management Inc. | 0.00% | Add +14.0% | 386,193 | $6.9M |
| Bank of Nova Scotia | 0.01% | Reduce -1.7% | 373,629 | $6.7M |
| Bridgewater Associates | 0.03% | Add +2.1% | 359,138 | $6.4M |
| Gabelli Funds LLC | 0.04% | Reduce -4.6% | 351,160 | $6.3M |
| Burkehill Global Management, LP | 0.24% | No change | 350,000 | $6.3M |
| Royce & Associates LP | 0.05% | Reduce -23.1% | 347,262 | $6.2M |
| Alliancebernstein L.P. | 0.00% | Reduce -79.9% | 332,517 | $6.2M |
| HRT Financial LP | 0.01% | New | 339,916 | $6.1M |
| Holocene Advisors, LP | 0.01% | Add +297.0% | 337,724 | $6.1M |
| Ardsley Advisory Partners LP | 0.63% | No change | 325,000 | $5.8M |
| Sumitomo Mitsui DS Asset Management Company, Ltd | 0.04% | Reduce -11.2% | 322,714 | $5.8M |
| Frontier Capital Management Co. LLC | 0.05% | New | 298,979 | $5.4M |
"% of holder's portfolio" is MIR's weight in each manager's 13F, not the share of Mirion Technologies Inc. the manager owns.