RDNT RadNet Inc.
RadNet Inc. (RDNT) Institutional Ownership
What the institutions did with RDNT 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 June 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.
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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 |
|---|---|---|
| BlackRock, Inc. | 11.0M | 13.4% |
| RTW INVESTMENTS, LP | 4.8M | 5.9% |
| PRICE T ROWE ASSOCIATES INC /MD/ | 4.5M | 5.5% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 4.1M | 5.0% |
| VANGUARD CAPITAL MANAGEMENT LLC | 3.2M | 3.9% |
| BECK MACK & OLIVER LLC | 3.2M | 3.9% |
| STATE STREET CORP | 2.8M | 3.5% |
| GEODE CAPITAL MANAGEMENT, LLC | 1.9M | 2.3% |
| Invesco Ltd. | 1.6M | 2.0% |
| AMERICAN CENTURY COMPANIES INC | 1.6M | 2.0% |
| Clearbridge Investments, LLC | 1.5M | 1.9% |
| DIMENSIONAL FUND ADVISORS LP | 1.5M | 1.8% |
| Hood River Capital Management LLC | 1.5M | 1.8% |
| JB CAPITAL PARTNERS LP | 1.4M | 1.7% |
| BAMCO INC /NY/ | 1.3M | 1.5% |
| Van Berkom & Associates Inc. | 1.2M | 1.5% |
| GOLDMAN SACHS GROUP INC | 1.2M | 1.4% |
| Alyeska Investment Group, L.P. | 1.2M | 1.4% |
| Penserra Capital Management LLC | 1.1M | 1.4% |
| Defiance ETFs, LLC | 1.1M | 1.4% |
| PRINCIPAL FINANCIAL GROUP INC | 1.1M | 1.3% |
| WESTFIELD CAPITAL MANAGEMENT CO LP | 975.5K | 1.2% |
| MORGAN STANLEY | 931.1K | 1.1% |
| NORTHERN TRUST CORP | 813.1K | 1.0% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 792.3K | 1.0% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| BlackRock, Inc. | Increased | 10.0M | 11.0M | +922.1K |
| Van Berkom & Associates Inc. | Reduced | 2.1M | 1.2M | -864.1K |
| FULLER & THALER ASSET MANAGEMENT, INC. | Sold Out | 806.3K | 0 | -806.3K |
| AMERICAN CENTURY COMPANIES INC | Increased | 902.2K | 1.6M | +716.2K |
| Penserra Capital Management LLC | Increased | 545.5K | 1.1M | +598.1K |
| Defiance ETFs, LLC | Increased | 545.5K | 1.1M | +598.1K |
| RTW INVESTMENTS, LP | Increased | 4.3M | 4.8M | +562.0K |
| FRANKLIN RESOURCES INC | Reduced | 458.6K | 5.6K | -453.0K |
| BAMCO INC /NY/ | Increased | 810.1K | 1.3M | +450.9K |
| WESTFIELD CAPITAL MANAGEMENT CO LP | Increased | 531.9K | 975.5K | +443.6K |
| MILLENNIUM MANAGEMENT LLC | Increased | 46.6K | 465.6K | +419.0K |
| E. Ohman J:or Asset Management AB | Increased | 36.4K | 453.0K | +416.6K |
| Freestone Grove Partners LP | Reduced | 365.4K | 204 | -365.2K |
| Point72 Asset Management, L.P. | Reduced | 855.4K | 492.4K | -362.9K |
| PRICE T ROWE ASSOCIATES INC /MD/ | Increased | 4.2M | 4.5M | +346.3K |
| SOROS FUND MANAGEMENT LLC | Reduced | 438.5K | 116.6K | -321.9K |
| First Eagle Investment Management, LLC | Increased | 94.1K | 390.1K | +295.9K |
| Clearbridge Investments, LLC | Increased | 1.3M | 1.5M | +268.1K |
| Allspring Global Investments Holdings, LLC | Reduced | 865.4K | 608.1K | -257.3K |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | Increased | 136.6K | 368.0K | +231.4K |
| FMR LLC | Reduced | 222.4K | 11.8K | -210.5K |
| STATE STREET CORP | Increased | 2.7M | 2.8M | +190.9K |
| VOYA INVESTMENT MANAGEMENT LLC | Increased | 417.4K | 604.9K | +187.5K |
| BANK OF AMERICA CORP /DE/ | Reduced | 589.6K | 420.7K | -168.9K |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 3.9M | 4.1M | +167.8K |
| AMERIPRISE FINANCIAL INC | Reduced | 899.1K | 745.6K | -153.5K |
| BESSEMER GROUP INC | Reduced | 550.2K | 397.4K | -152.8K |
| Alyeska Investment Group, L.P. | Reduced | 1.3M | 1.2M | -137.6K |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 1.7M | 1.9M | +134.9K |
| UBS Group AG | Increased | 486.7K | 619.6K | +133.0K |
| FRED ALGER MANAGEMENT, LLC | Reduced | 341.9K | 217.4K | -124.5K |
| WELLINGTON MANAGEMENT GROUP LLP | Reduced | 395.9K | 280.0K | -115.8K |
| Schonfeld Strategic Advisors LLC | New | 0 | 115.3K | +115.3K |
| DIMENSIONAL FUND ADVISORS LP | Increased | 1.4M | 1.5M | +112.0K |
| Polar Capital Holdings Plc | Reduced | 734.3K | 623.0K | -111.2K |
| PICTON MAHONEY ASSET MANAGEMENT | Reduced | 309.1K | 202.0K | -107.1K |
| SEB Asset Management AB | Increased | 76.7K | 180.3K | +103.6K |
| PARADIGM CAPITAL MANAGEMENT INC/NY | Increased | 54.7K | 155.4K | +100.7K |
| PALISADE CAPITAL MANAGEMENT, LP | Reduced | 291.3K | 199.4K | -91.9K |
| Temasek Holdings (Private) Ltd | New | 0 | 87.0K | +87.0K |
| BARCLAYS PLC | Increased | 13.0K | 96.1K | +83.2K |
| Caisse de depot et placement du Quebec | Sold Out | 82.6K | 0 | -82.6K |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 3.1M | 3.2M | +82.6K |
| MORGAN STANLEY | Increased | 850.5K | 931.1K | +80.6K |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | New | 0 | 80.1K | +80.1K |
| Global Alpha Capital Management Ltd. | Increased | 658.2K | 734.9K | +76.7K |
| ROYCE & ASSOCIATES LP | Increased | 137.0K | 211.3K | +74.3K |
| Granahan Investment Management, LLC | Increased | 104.3K | 171.6K | +67.4K |
| NORTHERN TRUST CORP | Increased | 746.8K | 813.1K | +66.2K |
| PRINCIPAL FINANCIAL GROUP INC | Reduced | 1.1M | 1.1M | -58.9K |
| Squarepoint Ops LLC | Sold Out | 58.5K | 0 | -58.5K |
| Verition Fund Management LLC | Sold Out | 55.7K | 0 | -55.7K |
| Rockefeller Capital Management L.P. | Increased | 703.1K | 758.0K | +54.9K |
| AXIOM INVESTORS LLC /DE | Sold Out | 51.0K | 0 | -51.0K |
| D. E. Shaw & Co., Inc. | Sold Out | 50.5K | 0 | -50.5K |
| GILDER GAGNON HOWE & CO LLC | Sold Out | 49.5K | 0 | -49.5K |
| NEUBERGER BERMAN GROUP LLC | Reduced | 503.2K | 455.8K | -47.4K |
| SEI INVESTMENTS CO | Reduced | 255.0K | 208.1K | -46.9K |
| FIRST TRUST ADVISORS LP | Reduced | 65.3K | 19.1K | -46.2K |
| Hood River Capital Management LLC | Increased | 1.4M | 1.5M | +44.7K |
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.