MIR Mirion Technologies, Inc.
Mirion Technologies, Inc. (MIR) Institutional Ownership
What the institutions did with MIR last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended September 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
Sign in or subscribeOwnership map
Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| GEODE CAPITAL MANAGEMENT, LLC | 6.1M | 15.1% |
| CONGRESS ASSET MANAGEMENT CO | 6.0M | 15.0% |
| DIMENSIONAL FUND ADVISORS LP | 5.9M | 14.6% |
| FMR LLC | 3.7M | 9.1% |
| Swedbank AB | 2.1M | 5.2% |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | 1.6M | 3.9% |
| Bank of New York Mellon Corp | 1.4M | 3.4% |
| TimesSquare Capital Management, LLC | 1.3M | 3.1% |
| PRINCIPAL FINANCIAL GROUP INC | 1.2M | 2.9% |
| Conestoga Capital Advisors, LLC | 970.3K | 2.4% |
| DEUTSCHE BANK AG\ | 679.1K | 1.7% |
| Bastion Asset Management Inc. | 640.3K | 1.6% |
| Nuveen, LLC | 572.9K | 1.4% |
| Allspring Global Investments Holdings, LLC | 513.7K | 1.3% |
| SCHWARTZ INVESTMENT COUNSEL INC | 476.2K | 1.2% |
| CITIGROUP INC | 413.7K | 1.0% |
| Montanaro Asset Management Ltd | 411.6K | 1.0% |
| Russell Investments Group, Ltd. | 336.4K | 0.8% |
| EXCHANGE TRADED CONCEPTS, LLC | 324.9K | 0.8% |
| KING LUTHER CAPITAL MANAGEMENT CORP | 312.5K | 0.8% |
| Sumitomo Mitsui DS Asset Management Company, Ltd | 307.8K | 0.8% |
| ESSEX INVESTMENT MANAGEMENT CO LLC | 285.4K | 0.7% |
| Hollow Brook Wealth Management LLC | 218.1K | 0.5% |
| Creative Planning | 218.0K | 0.5% |
| BESSEMER GROUP INC | 198.9K | 0.5% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| FMR LLC | Reduced | 7.3M | 3.7M | -3.7M |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | New | 0 | 1.6M | +1.6M |
| Nuveen, LLC | Reduced | 2.1M | 572.9K | -1.5M |
| EMERALD ADVISERS, LLC | Sold Out | 1.4M | 0 | -1.4M |
| DIMENSIONAL FUND ADVISORS LP | Increased | 4.9M | 5.9M | +1.0M |
| EMERALD MUTUAL FUND ADVISERS TRUST | Sold Out | 873.5K | 0 | -873.5K |
| CONGRESS ASSET MANAGEMENT CO | Reduced | 6.7M | 6.0M | -650.9K |
| Aberdeen Group plc | Reduced | 627.6K | 20.3K | -607.2K |
| Swedbank AB | Reduced | 2.5M | 2.1M | -429.0K |
| Robeco Schweiz AG | Sold Out | 424.0K | 0 | -424.0K |
| ZEVENBERGEN CAPITAL INVESTMENTS LLC | Sold Out | 400.3K | 0 | -400.3K |
| Bastion Asset Management Inc. | Increased | 272.5K | 640.3K | +367.8K |
| ROYCE & ASSOCIATES LP | Sold Out | 347.3K | 0 | -347.3K |
| Allspring Global Investments Holdings, LLC | Reduced | 846.8K | 513.7K | -333.1K |
| KING LUTHER CAPITAL MANAGEMENT CORP | New | 0 | 312.5K | +312.5K |
| Conestoga Capital Advisors, LLC | Reduced | 1.2M | 970.3K | -277.8K |
| Tema ETFs LLC | Sold Out | 226.4K | 0 | -226.4K |
| GEODE CAPITAL MANAGEMENT, LLC | Reduced | 6.3M | 6.1M | -194.7K |
| CITIGROUP INC | Reduced | 598.8K | 413.7K | -185.1K |
| Russell Investments Group, Ltd. | Increased | 184.0K | 336.4K | +152.4K |
| Illinois Municipal Retirement Fund | Sold Out | 149.4K | 0 | -149.4K |
| B. Metzler seel. Sohn & Co. AG | Sold Out | 144.8K | 0 | -144.8K |
| TimesSquare Capital Management, LLC | Reduced | 1.4M | 1.3M | -142.0K |
| WOODMONT INVESTMENT COUNSEL LLC | New | 0 | 138.4K | +138.4K |
| Moody Aldrich Partners LLC | New | 0 | 135.9K | +135.9K |
| Creative Planning | Increased | 109.6K | 218.0K | +108.4K |
| Cambridge Investment Research Advisors, Inc. | Reduced | 200.8K | 100.1K | -100.7K |
| SCHWARTZ INVESTMENT COUNSEL INC | Reduced | 573.9K | 476.2K | -97.8K |
| EXCHANGE TRADED CONCEPTS, LLC | Reduced | 420.4K | 324.9K | -95.5K |
| LBP AM SA | Sold Out | 78.9K | 0 | -78.9K |
| KORNITZER CAPITAL MANAGEMENT INC /KS | Reduced | 170.7K | 92.5K | -78.2K |
| BARCLAYS PLC | Increased | 44.1K | 116.5K | +72.4K |
| Jefferson Bridge Capital, LLC | New | 0 | 63.2K | +63.2K |
| VIRGINIA RETIREMENT SYSTEMS ET Al | Increased | 15.4K | 75.1K | +59.7K |
| Advisors Preferred, LLC | New | 0 | 58.9K | +58.9K |
| HARBOR CAPITAL ADVISORS, INC. | New | 0 | 56.1K | +56.1K |
| Mitsubishi UFJ Asset Management Co., Ltd. | New | 0 | 51.4K | +51.4K |
| INTECH INVESTMENT MANAGEMENT LLC | Reduced | 58.8K | 10.4K | -48.4K |
| Diversify Advisory Services, LLC | Increased | 78.8K | 126.8K | +48.0K |
| DIVERSIFY WEALTH MANAGEMENT, LLC | Increased | 78.8K | 126.8K | +48.0K |
| Handelsbanken Fonder AB | Reduced | 89.0K | 41.6K | -47.5K |
| IMC-Chicago, LLC | New | 0 | 47.5K | +47.5K |
| Sterling Capital Management LLC | Reduced | 49.0K | 7.6K | -41.5K |
| State of Alaska, Department of Revenue | Reduced | 91.6K | 54.1K | -37.6K |
| OP Asset Management Ltd | Sold Out | 35.2K | 0 | -35.2K |
| Register Financial Advisors LLC | Reduced | 178.8K | 146.0K | -32.8K |
| Summit Creek Advisors LLC | Reduced | 198.4K | 167.3K | -31.1K |
| FIFTH THIRD BANCORP | Reduced | 203.0K | 178.9K | -24.0K |
| Ulland Investment Advisors, LLC | Increased | 14.8K | 37.8K | +23.0K |
| Savant Capital, LLC | New | 0 | 22.7K | +22.7K |
| Fulcrum Asset Management LLP | New | 0 | 22.5K | +22.5K |
| DELTEC ASSET MANAGEMENT LLC | Reduced | 80.0K | 60.0K | -20.0K |
| Compagnie Lombard Odier SCmA | Increased | 16.0K | 35.8K | +19.8K |
| SteelPeak Wealth, LLC | New | 0 | 18.8K | +18.8K |
| ELEVATION POINT WEALTH PARTNERS, LLC | Sold Out | 18.7K | 0 | -18.7K |
| Maryland State Retirement & Pension System | Increased | 35.6K | 54.0K | +18.3K |
| PRINCIPAL FINANCIAL GROUP INC | Reduced | 1.2M | 1.2M | -17.8K |
| Hollow Brook Wealth Management LLC | Reduced | 234.2K | 218.1K | -16.1K |
| ONE WEALTH CAPITAL MANAGEMENT, LLC | Sold Out | 15.0K | 0 | -15.0K |
| Sumitomo Mitsui DS Asset Management Company, Ltd | Reduced | 322.7K | 307.8K | -14.9K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.