RDNT RadNet Inc.

NASDAQ
$75.78

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.

Managers compared
373
filed both this quarter and last
Managers holding
323
-14 on the quarter
Buyers
165
36 opened new
Sellers
164
50 sold out entirely
Buyer share
50.2%
of managers who traded it
Breadth
+0.3
net buyers, as a share of those trading

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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Ownership 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.

Cut Unchanged Added Color saturates at ±50%.

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.