Mirion TechnologiesMIR
13F holders, Q1 2025 (March 31)231holders +7
43new positions
39sold out
9famous investors
$14.51avg. 13F price*
At the end of Q1 2025, 231 institutions reported holding Mirion Technologies Inc. (MIR) in their 13F filings, up 7 from Q4 2024. 43 opened new positions and 39 sold out. The largest holders were Vanguard Group Inc. ($337.2M), T. Rowe Price Investment Management, Inc. ($300.3M) and BlackRock, Inc. ($234.0M). 9 famous investors held it, including Leon Cooperman (4.0% of Omega Advisors (Leon Cooperman)'s portfolio), Lee Ainslie (2.1% 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 2024 → Q1 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 43 | $51.2M |
| Exits | 39 | $113.5M |
All 13F filers, Q4 2024 → Q1 2025: 20,163,030 shares bought and 23,414,085 shares sold, net −3,251,055 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 231 holders
| Vanguard Group Inc. | 0.01% | Reduce -2.7% | 23,258,048 | $337.2M |
| T. Rowe Price Investment Management, Inc. | 0.20% | Add +1.6% | 20,710,389 | $300.3M |
| BlackRock, Inc. | 0.00% | Add +0.2% | 16,139,924 | $234.0M |
| Janus Henderson Group PLC | 0.07% | Add +3.1% | 8,587,664 | $125.6M |
| Maverick Capital | 2.10% | Add +30.4% | 8,056,109 | $116.8M |
| Dimensional Fund Advisors LP | 0.03% | Add +2.5% | 7,363,954 | $106.8M |
| Omega Advisors (Leon Cooperman) | 4.04% | No change | 7,025,000 | $101.9M |
| Brown Advisory Inc. | 0.12% | Add +45.9% | 5,560,461 | $80.6M |
| Swedbank AB | 0.10% | Reduce -11.1% | 5,387,000 | $78.1M |
| State Street Corp. | 0.00% | Reduce -1.2% | 5,139,569 | $74.5M |
| Geode Capital Management, LLC | 0.01% | Add +3.6% | 4,738,769 | $68.7M |
| Alyeska Investment Group, L.P. | 0.24% | Add +10.3% | 4,150,262 | $60.2M |
| American Century Companies Inc. | 0.03% | Add +43.9% | 3,432,814 | $49.8M |
| Corsair Capital Management, L.P. | 11.47% | Reduce -3.1% | 3,072,003 | $44.5M |
| Artemis Investment Management LLP | 0.67% | Add +37.1% | 2,998,435 | $43.5M |
| Arrowstreet Capital, Limited Partnership | 0.03% | Reduce -33.8% | 2,789,509 | $40.4M |
| Millennium Management | 0.04% | Reduce -17.3% | 2,567,660 | $37.2M |
| Lord, Abbett & Co. LLC | 0.13% | Add +1.3% | 2,399,864 | $34.8M |
| Select Equity Group, L.P. | 0.15% | Reduce -0.9% | 2,292,236 | $33.2M |
| ArrowMark Colorado Holdings LLC | 0.51% | Reduce -7.6% | 2,188,926 | $31.7M |
| Bornite Capital Management LP | 7.71% | Reduce -2.5% | 2,064,300 | $29.9M |
| Northern Trust Corp. | 0.00% | Reduce -3.5% | 1,971,182 | $28.6M |
| William Blair Investment Management, LLC | 0.07% | Reduce -43.1% | 1,731,391 | $25.1M |
| Raymond James Financial Inc. | 0.01% | Add +74.7% | 1,717,848 | $24.9M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +2.6% | 1,641,075 | $23.8M |
| ACK Asset Management LLC | 3.85% | Reduce -10.8% | 1,618,356 | $23.5M |
| UBS Group AG | 0.00% | Reduce -3.2% | 1,497,206 | $21.7M |
| Nuveen, LLC | 0.01% | — | 1,388,424 | $20.1M |
| Chescapmanager LLC | 4.01% | No change | 1,327,895 | $19.3M |
| Silvercrest Asset Management Group LLC | 0.14% | Add +35.4% | 1,310,960 | $19.0M |
| Morgan Stanley | 0.00% | Add +16.5% | 1,222,077 | $17.7M |
| Schroder Investment Management Group | 0.02% | Add +66.3% | 1,122,671 | $16.4M |
| Victory Capital Management Inc. | 0.02% | Add +3556.6% | 1,004,697 | $14.6M |
| Masters Capital Management LLC | 3.07% | No change | 1,000,000 | $14.5M |
| Schwartz Investment Counsel Inc. | 0.48% | Reduce -29.3% | 954,300 | $13.8M |
| Pier Capital, LLC | 2.29% | Add +43.1% | 941,480 | $13.7M |
| Rockefeller Capital Management L.P. | 0.03% | New | 938,237 | $13.6M |
| Jennison Associates LLC | 0.01% | Add +81.2% | 931,867 | $13.5M |
| Citadel Advisors | 0.01% | Add +717.4% | 909,252 | $13.2M |
| Summit Partners Public Asset Management, LLC | 0.62% | New | 896,000 | $13.0M |
| Emerald Advisers, LLC | 0.57% | Add +44.8% | 880,089 | $12.8M |
| Arosa Capital Management LP | 8.36% | Add +76.1% | 868,261 | $12.6M |
| FIL Ltd | 0.01% | Reduce -59.7% | 810,893 | $11.8M |
| Segall Bryant & Hamill, LLC | 0.16% | Add +49.9% | 711,349 | $10.3M |
| Bank of New York Mellon Corp | 0.00% | Add +1.2% | 669,138 | $9.7M |
| Royce & Associates LP | 0.11% | Add +47.6% | 668,643 | $9.7M |
| Qube Research & Technologies Ltd | 0.01% | Add +36.6% | 650,207 | $9.4M |
| Renaissance Technologies | 0.01% | Add +343.9% | 643,700 | $9.3M |
| Norges Bank | 0.00% | New | 602,500 | $8.7M |
| GAMCO Investors | 0.09% | Reduce -1.3% | 592,127 | $8.6M |
| Allspring Global Investments Holdings, LLC | 0.01% | Add +14.5% | 596,100 | $8.6M |
| Bank of America Corp. | 0.00% | Add +191.8% | 588,622 | $8.5M |
| Goldman Sachs Group Inc. | 0.00% | Reduce -93.5% | 579,644 | $8.4M |
| Trexquant Investment LP | 0.10% | Add +25.1% | 567,609 | $8.2M |
| Gabelli Funds LLC | 0.06% | Reduce -5.8% | 524,250 | $7.6M |
| Emerald Mutual Fund Advisers Trust | 0.54% | Add +123.7% | 507,116 | $7.4M |
| Telemark Asset Management, LLC | 0.95% | No change | 500,000 | $7.3M |
| Ensign Peak Advisors, Inc | 0.01% | Add +5.1% | 496,147 | $7.2M |
| D. E. Shaw & Co. | 0.01% | Add +41.3% | 451,617 | $6.5M |
| Kingdon Capital Management, L.L.C. | 1.35% | Add +12.5% | 450,000 | $6.5M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Add +8.8% | 434,583 | $6.3M |
| Tudor Investment Corporation | 0.06% | Add +159.8% | 430,949 | $6.2M |
| TD Asset Management Inc | 0.01% | Add +1.9% | 415,034 | $6.0M |
| Swiss National Bank | 0.00% | Add +4.3% | 393,200 | $5.7M |
| Roubaix Capital, LLC | 2.86% | Add +177.4% | 379,098 | $5.5M |
| Nicholas Investment Partners, LP | 0.62% | Reduce -14.9% | 367,256 | $5.3M |
| Aperture Investors, LLC | 0.79% | Reduce -3.8% | 357,367 | $5.2M |
| Bastion Asset Management Inc. | 2.63% | New | 326,580 | $4.9M |
| Susquehanna International Group, LLP | 0.01% | Add +272.6% | 334,696 | $4.9M |
| Jane Street Group, LLC | 0.01% | Add +1487.0% | 328,184 | $4.8M |
| Invesco Ltd. | 0.00% | Reduce -34.4% | 321,838 | $4.7M |
| FMR LLC | 0.00% | Add +6.5% | 321,791 | $4.7M |
| First Trust Advisors LP | 0.00% | Add +190.5% | 317,407 | $4.6M |
| Rhumbline Advisers | 0.00% | Reduce -3.5% | 307,422 | $4.5M |
| Essex Investment Management Co. LLC | 0.91% | Reduce -0.8% | 301,873 | $4.4M |
| Wells Fargo & Company | 0.00% | Reduce -1.2% | 291,129 | $4.2M |
| JPMorgan Chase & Co. | 0.00% | Reduce -52.0% | 287,369 | $4.2M |
| Walleye Capital LLC | 0.05% | Add +177.6% | 286,320 | $4.2M |
| Rice Hall James & Associates, LLC | 0.23% | Reduce -0.1% | 270,106 | $3.9M |
| Deutsche Bank AG | 0.00% | Reduce -16.1% | 261,177 | $3.8M |
| Hollow Brook Wealth Management LLC | 1.10% | Add +22.0% | 256,742 | $3.7M |
| Barclays PLC | 0.00% | Reduce -28.2% | 253,540 | $3.7M |
| Schonfeld Strategic Advisors LLC | 0.02% | Reduce -1.5% | 248,969 | $3.6M |
| Legal & General Group Plc | 0.00% | Add +6.4% | 233,729 | $3.4M |
| Alliancebernstein L.P. | 0.00% | Add +1.3% | 219,330 | $3.2M |
| Verition Fund Management LLC | 0.02% | Reduce -19.4% | 201,406 | $2.9M |
| AQR Capital Management | 0.00% | Add +124.3% | 199,211 | $2.9M |
| Sei Investments Co. | 0.00% | Add +3.1% | 193,739 | $2.8M |
| Lazard Asset Management LLC | 0.00% | Reduce -31.2% | 191,755 | $2.8M |
| Sandler Capital Management | 0.86% | Reduce -68.2% | 181,787 | $2.6M |
| Alberta Investment Management Corp | 0.02% | Add +17.1% | 180,520 | $2.6M |
| Envestnet Asset Management Inc. | 0.00% | Add +818.0% | 177,968 | $2.6M |
| California State Teachers Retirement System | 0.00% | Reduce -1.6% | 177,403 | $2.6M |
| Ardsley Advisory Partners LP | 0.59% | Add +40.0% | 175,000 | $2.5M |
| Citigroup Inc. | 0.00% | Reduce -11.5% | 165,865 | $2.4M |
| Balyasny Asset Management L.P. | 0.01% | Add +349.4% | 164,032 | $2.4M |
| Dark Forest Capital Management LP | 0.10% | New | 151,996 | $2.2M |
| T. Rowe Price Associates Inc. | 0.00% | Add +7.0% | 150,130 | $2.2M |
| HRT Financial LP | 0.01% | Reduce -6.6% | 145,133 | $2.1M |
| Legato Capital Management LLC | 0.27% | Reduce -6.4% | 136,125 | $2.0M |
| Exchange Traded Concepts, LLC | 0.03% | Add +50.9% | 134,005 | $1.9M |
| Intech Investment Management LLC | 0.02% | Add +38.0% | 127,952 | $1.9M |
| State of New Jersey Common Pension Fund D | 0.01% | Reduce -1.9% | 126,687 | $1.8M |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Add +4.6% | 122,962 | $1.8M |
| MetLife Investment Management, LLC | 0.01% | Reduce -1.2% | 122,683 | $1.8M |
| Manufacturers Life Insurance Company, The | 0.00% | Add +9.6% | 117,445 | $1.7M |
| New York State Common Retirement Fund | 0.00% | Reduce -6.7% | 117,028 | $1.7M |
| Ameriprise Financial Inc. | 0.00% | Add +19.6% | 111,609 | $1.6M |
| State of Wisconsin Investment Board | 0.00% | Add +329.6% | 111,263 | $1.6M |
| Squarepoint Ops LLC | 0.00% | Add +96.9% | 107,363 | $1.6M |
| Corebridge Financial, Inc. | 0.01% | Reduce -1.5% | 101,203 | $1.5M |
| Pathstone Holdings, LLC | 0.01% | Add +160.7% | 99,681 | $1.4M |
| Royal Bank of Canada | 0.00% | Add +258.2% | 98,828 | $1.4M |
| Aquatic Capital Management LLC | 0.04% | New | 97,996 | $1.4M |
| Sumitomo Mitsui DS Asset Management Company, Ltd | 0.01% | New | 87,721 | $1.3M |
| Sterling Capital Management LLC | 0.02% | Reduce -0.0% | 84,865 | $1.2M |
| State of Wyoming | 0.16% | Reduce -22.4% | 81,274 | $1.2M |
| First Manhattan Co. Llc. | 0.00% | Reduce -36.0% | 76,932 | $1.1M |
| XTX Topco Ltd | 0.05% | Add +207.1% | 69,269 | $1.0M |
| CastleKnight Management LP | 0.10% | Reduce -36.8% | 63,100 | $915K |
| TT International Asset Management LTD | 0.14% | New | 62,346 | $904K |
| Handelsbanken Fonder AB | 0.00% | No change | 61,031 | $885K |
| Vontobel Holding Ltd. | 0.00% | New | 59,895 | $868K |
| Cresset Asset Management, LLC | 0.00% | No change | 58,500 | $848K |
| Arizona State Retirement System | 0.01% | Add +4.7% | 58,214 | $844K |
| Creative Planning | 0.00% | Add +182.5% | 57,348 | $832K |
| State Board of Administration of Florida Retirement System | 0.00% | No change | 57,210 | $830K |
| Jefferies Financial Group Inc. | 0.01% | New | 56,300 | $816K |
| Mariner, LLC | 0.00% | Add +180.3% | 56,178 | $815K |
| Voya Investment Management LLC | 0.00% | Reduce -7.4% | 55,838 | $810K |
| Graham Capital Management, L.P. | 0.04% | Reduce -48.8% | 55,154 | $800K |
| LPL Financial LLC | 0.00% | Add +303.3% | 48,818 | $708K |
| Wolverine Asset Management LLC | 0.05% | Reduce -70.4% | 48,000 | $696K |
| VIRGINIA RETIREMENT SYSTEMS ET Al | 0.01% | — | 47,546 | $689K |
| Cibc World Markets Corp. | 0.01% | Add +137.1% | 45,838 | $665K |
| ProShare Advisors LLC | 0.00% | Reduce -23.1% | 44,721 | $648K |
| Police & Firemen's Retirement System of New Jersey | 0.01% | No change | 44,108 | $640K |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 0.00% | No change | 38,387 | $557K |
| KLP Kapitalforvaltning As | 0.00% | No change | 37,500 | $544K |
| Pictet Asset Management Holding SA | 0.00% | Add +24.5% | 35,010 | $508K |
| Engineers Gate Manager LP | 0.01% | Reduce -29.9% | 34,303 | $497K |
| Campbell & CO Investment Adviser LLC | 0.04% | Reduce -6.1% | 33,425 | $485K |
| Oppenheimer & Co. Inc. | 0.01% | Reduce -5.3% | 33,315 | $483K |
| Simplex Trading, LLC | 0.02% | New | 31,370 | $454K |
| Teacher Retirement System of Texas | 0.00% | Add +86.7% | 29,565 | $429K |
| Register Financial Advisors LLC | 0.22% | New | 29,300 | $425K |
| Bantamac Capital, LLC | 0.18% | Add +88.5% | 25,934 | $376K |
| Simon Quick Advisors, LLC | 0.02% | Add +2.7% | 24,705 | $358K |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 0.00% | New | 24,189 | $351K |
| HSBC Holdings PLC | 0.00% | Reduce -0.3% | 23,965 | $342K |
| PDT Partners, LLC | 0.02% | New | 22,969 | $333K |
| PNC Financial Services Group, Inc. | 0.00% | Reduce -12.4% | 22,898 | $332K |
| Sumitomo Life Insurance Co. | 0.01% | New | 22,676 | $329K |
| Mackenzie Financial Corp. | 0.00% | Add +2.6% | 22,478 | $326K |
| Ameritas Investment Partners, Inc. | 0.01% | Reduce -3.3% | 20,898 | $303K |
| STRS Ohio | 0.00% | No change | 19,300 | $280K |
| SG Americas Securities, LLC | 0.00% | New | 19,021 | $276K |
| Sanctuary Advisors, LLC | 0.00% | Add +23.0% | 18,343 | $266K |
| Tidal Investments LLC | 0.00% | New | 17,217 | $250K |
| Prudential Financial Inc. | 0.00% | Add +8.5% | 15,945 | $231K |
| Xponance LLC | 0.00% | Add +5.7% | 15,793 | $229K |
| Truist Financial Corp. | 0.00% | Add +14.6% | 15,683 | $227K |
| Ieq Capital, LLC | 0.00% | New | 14,919 | $216K |
| Principal Financial Group Inc. | 0.00% | Add +14.9% | 14,057 | $204K |
| Diametric Capital, LP | 0.24% | Reduce -17.4% | 13,679 | $198K |
| Keybank National Association | 0.00% | New | 13,547 | $196K |
| BNP Paribas Financial Markets | 0.00% | Reduce -51.1% | 13,447 | $195K |
| Stifel Financial Corp. | 0.00% | New | 12,859 | $186K |
| Longboard Asset Management, LP | 0.49% | No change | 11,594 | $168K |
| Two Sigma Securities, LLC | 0.03% | New | 11,427 | $166K |
| Integrated Advisors Network LLC | 0.01% | Reduce -38.9% | 11,298 | $164K |
| Sciencast Management LP | 0.04% | New | 10,508 | $152K |
| KBC Group NV | 0.00% | Add +31.0% | 10,485 | $152K |
| Corient IA LP | 0.10% | — | 10,000 | $145K |
| Amalgamated Bank | 0.00% | Add +0.3% | 7,062 | $102K |
| US Bancorp \de | 0.00% | Add +6.4% | 6,664 | $97K |
| Cwm, LLC | 0.00% | Add +1026.3% | 6,431 | $93K |
| Tower Research Capital LLC (TRC) | 0.00% | Reduce -16.0% | 5,586 | $81K |
| Smartleaf Asset Management LLC | 0.01% | Add +582.2% | 5,205 | $76K |
| BI Asset Management Fondsmaeglerselskab A/S | 0.00% | New | 4,676 | $68K |
| AlphaQuest LLC | 0.01% | Add +360400.0% | 3,605 | $52K |
| Nisa Investment Advisors, LLC | 0.00% | Reduce -2.9% | 2,715 | $39K |
| Central Pacific Bank - Trust Division | 0.01% | Reduce -50.0% | 2,500 | $36K |
| Parallel Advisors, LLC | 0.00% | Add +14.5% | 1,986 | $29K |
| Summit Securities Group LLC | 0.02% | New | 1,659 | $24K |
| Versant Capital Management, Inc | 0.00% | New | 1,163 | $17K |
| Comerica Bank | 0.00% | Reduce -16.8% | 1,037 | $15K |
| Clearstead Advisors, LLC | 0.00% | No change | 924 | $13K |
| Bessemer Group Inc. | 0.00% | Reduce -19.3% | 896 | $13K |
| Quadrant Capital Group LLC | 0.00% | Reduce -17.3% | 817 | $12K |
| Optiver Holding B.V. | 0.00% | Reduce -34.5% | 736 | $11K |
| Avion Wealth | 0.00% | No change | 620 | $10K |
| First Horizon Advisors, Inc. | 0.00% | New | 642 | $9K |
| Osaic Holdings, Inc. | 0.00% | Reduce -28.8% | 642 | $9K |
| Rise Advisors, LLC | 0.00% | New | 579 | $8K |
| GAMMA Investing LLC | 0.00% | Add +66.2% | 502 | $7K |
| Global Financial Private Client, LLC | 0.00% | Add +4390.9% | 494 | $7K |
| Hillsdale Investment Management Inc. | 0.00% | New | 430 | $6K |
| CIBC Private Wealth Group LLC | 0.00% | No change | 400 | $5K |
| Sierra Ocean, LLC | 0.00% | New | 321 | $5K |
| EverSource Wealth Advisors, LLC | 0.00% | Add +255.6% | 288 | $4K |
| Public Employees Retirement System of Ohio | 0.00% | New | 270 | $4K |
| Millstone Evans Group, LLC | 0.00% | New | 268 | $4K |
| Allworth Financial LP | 0.00% | Add +168.5% | 247 | $4K |
| Lindbrook Capital, LLC | 0.00% | Add +22.8% | 253 | $4K |
| Murphy & Mullick Capital Management Corp | 0.00% | No change | 250 | $4K |
| Rothschild Investment LLC | 0.00% | New | 230 | $3K |
| Coldstream Capital Management Inc. | 0.00% | New | 213 | $3K |
| Larson Financial Group LLC | 0.00% | New | 189 | $3K |
| Blue Trust, Inc. | 0.00% | No change | 146 | $2K |
| Hemington Wealth Management | 0.00% | Add +76.3% | 201 | $2K |
| Highline Wealth Partners LLC | 0.00% | New | 126 | $2K |
| Amundi | 0.00% | Reduce -1.5% | 133 | $2K |
| Parkside Financial Bank & Trust | 0.00% | New | 120 | $2K |
| JFS Wealth Advisors, LLC | 0.00% | Reduce -2.8% | 106 | $2K |
| Bell Investment Advisors, Inc | 0.00% | No change | 103 | $1K |
| Ameriflex Group, Inc. | 0.00% | No change | 94 | $1K |
| Russell Investments Group, Ltd. | 0.00% | New | 87 | $1K |
| Stephens Consulting, LLC | 0.00% | New | 75 | $1K |
| ORG Partners LLC | 0.00% | New | 90 | $861 |
| Caitong International Asset Management Co., Ltd | 0.00% | New | 43 | $624 |
| SJS Investment Consulting Inc. | 0.00% | No change | 43 | $624 |
| SBI Securities Co., Ltd. | 0.00% | Add +120.0% | 22 | $319 |
| Signaturefd, LLC | 0.00% | New | 15 | $218 |
| True Wealth Design, LLC | 0.00% | New | 12 | $174 |
| IFP Advisors, Inc | 0.00% | No change | 12 | $174 |
| Farther Finance Advisors, LLC | 0.00% | No change | 7 | $100 |
| Parkworth Wealth Management, Inc. | 0.00% | No change | 6 | $87 |
| HFM Investment Advisors, LLC | 0.00% | — | 6 | $87 |
| Bay Harbor Wealth Management, LLC | 0.00% | New | 4 | $58 |
| Covestor Ltd | 0.00% | No change | 13 | $0 |
"% of holder's portfolio" is MIR's weight in each manager's 13F, not the share of Mirion Technologies Inc. the manager owns.