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Equibles

RDNT

RadNet, Inc.

Company with tickers: RDNT

CIK
790526
CUSIP
750491102
Shares Outstanding
78,634,236
13F Activity (30d)
175 filings 174 filers

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 342
Total Value: $4,318,202,001
Total Shares: 77,262,520
Showing 1–100 of 348 holdings by value · page 1 of 4

Institutional Ownership Trend

25 quarters

Superinvestors Holding RDNT

All superinvestors →
George Soros $24,504,970

Holder Concentration

Across 342 13F filers · Δ vs Dec 31, 2025
Top Holder
13.0%
Jun 2023 → Mar 2026 · range 11.4% – 17.4%
+1.6 pts
Top 5
33.1%
Jun 2023 → Mar 2026 · range 28.5% – 45.2%
−1.3 pts
Top 10
46.7%
Jun 2023 → Mar 2026 · range 41.3% – 58.0%
−0.9 pts
HHI
356
Jun 2023 → Mar 2026 · range 310 – 630
Broadly held−18

Quarterly Activity

vs Dec 31, 2025
New
107
Increased
104
Decreased
88
Sold Out
47
Unchanged
43
Holder count: +60
Institutional value: +113.4%
Shares held: +172.5%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds Open
Mid Van Berkom & Associates Inc. +204,858 1,028,586
Large Freestone Grove Partners LP +184,383 365,394
Mega UBS Group AG +171,221 486,659
Mega Clearbridge Investments, LLC +163,567 1,278,540
Mid PALISADE CAPITAL MANAGEMENT, LP +130,209 291,346

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds Open
Large FRED ALGER MANAGEMENT, LLC −205,912 341,938
Mid SOROS FUND MANAGEMENT LLC −136,105 438,450
Mega NEUBERGER BERMAN GROUP LLC −85,813 503,172
Mid BECK MACK & OLIVER LLC −65,259 3,166,192
Small ROBOTTI ROBERT −63,569 120,492

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD) Open
Mega BlackRock, Inc. 10,035,734 $560,897,165
Large RTW INVESTMENTS, LP 4,285,000 $239,488,650
Mega PRICE T ROWE ASSOCIATES INC /MD/ 4,154,863 $232,215,292
Mega VANGUARD PORTFOLIO MANAGEMENT LLC 3,899,127 $217,922,208
Mega VANGUARD CAPITAL MANAGEMENT LLC 3,111,012 $173,874,460

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD) Open
Large ADAGE CAPITAL PARTNERS GP, L.L.C. 476,626 $34,007,265
Mid Integral Health Asset Management, LLC 200,000 $14,270,000
Mid Skandinaviska Enskilda Banken AB (publ) 77,341 $5,518,280
Mega TD Asset Management Inc 56,110 $4,003,448
Mid DEERFIELD MANAGEMENT COMPANY, L.P. 49,951 $3,564,003
Filter: New 107 Increased 104 Reduced 88 Sold out 47 Unchanged 43
Showing 100 of 348
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Open
Mega BlackRock, Inc. $560,897,165 12.99% 10,035,734
Large RTW INVESTMENTS, LP $239,488,650 5.55% 4,285,000
Mega PRICE T ROWE ASSOCIATES INC /MD/ $232,215,292 5.38% 4,154,863
Mega VANGUARD PORTFOLIO MANAGEMENT LLC $217,922,208 5.05% 3,899,127
Mid BECK MACK & OLIVER LLC $176,958,470 4.10% 3,166,192
Mega VANGUARD CAPITAL MANAGEMENT LLC $173,874,460 4.03% 3,111,012
Mega STATE STREET CORP $148,197,812 3.43% 2,651,598
Mega GEODE CAPITAL MANAGEMENT, LLC $96,332,395 2.23% 1,723,607
Mega Invesco Ltd. $91,296,033 2.11% 1,633,495
Small JB CAPITAL PARTNERS LP $79,590,769 1.84% 1,424,061
Mid Hood River Capital Management LLC $78,888,567 1.83% 1,411,497
Mega DIMENSIONAL FUND ADVISORS LP $77,072,475 1.78% 1,379,003
Large Alyeska Investment Group, L.P. $73,177,224 1.69% 1,309,308
Mega Clearbridge Investments, LLC $71,457,600 1.65% 1,278,540
Mega GOLDMAN SACHS GROUP INC $66,524,468 1.54% 1,190,275
Mega PRINCIPAL FINANCIAL GROUP INC $62,109,271 1.44% 1,111,277
Mid Van Berkom & Associates Inc. $57,487,671 1.33% 1,028,586
Mega AMERICAN CENTURY COMPANIES INC $50,423,510 1.17% 902,192
Mega AMERIPRISE FINANCIAL INC $50,252,151 1.16% 899,126
Large Allspring Global Investments Holdings, LLC $48,367,428 1.12% 865,404
Large Point72 Asset Management, L.P. $47,806,741 1.11% 855,372
Mega MORGAN STANLEY $47,532,820 1.10% 850,471
Large BAMCO INC /NY/ $45,274,588 1.05% 810,066
Large FULLER & THALER ASSET MANAGEMENT, INC. $45,063,883 1.04% 806,296
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $42,893,954 0.99% 767,471
Mega NORTHERN TRUST CORP Bank $41,739,040 0.97% 746,807
Large Polar Capital Holdings Plc $41,037,400 0.95% 734,253
Large Rockefeller Capital Management L.P. $39,297,151 0.91% 703,116
Large LOOMIS SAYLES & CO L P $38,352,556 0.89% 686,215
Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC $37,627,880 0.87% 673,249
Mega Nuveen, LLC $36,959,049 0.86% 661,282
Mid Global Alpha Capital Management Ltd. $36,787,245 0.85% 658,208
Mid PUNCH & ASSOCIATES INVESTMENT MANAGEMENT, INC. $33,270,199 0.77% 595,280
Mega BANK OF AMERICA CORP /DE/ Bank $32,953,300 0.76% 589,610
Large BESSEMER GROUP INC $30,749,108 0.71% 550,172
Mid Defiance ETFs, LLC Mutual Fund $30,486,541 0.71% 545,474
Mid Penserra Capital Management LLC $30,486,541 0.71% 545,474
Large WESTFIELD CAPITAL MANAGEMENT CO LP $29,727,499 0.69% 531,893
Mega NEUBERGER BERMAN GROUP LLC $28,122,283 0.65% 503,172
Mega UBS Group AG $27,199,371 0.63% 486,659
Mega DEUTSCHE BANK AG\ Bank $26,959,602 0.62% 482,369
Small Alpha Wave Global, LP $26,732,410 0.62% 478,304
Mega VANGUARD FIDUCIARY TRUST CO Bank $26,629,349 0.62% 476,460
Mega ROYAL BANK OF CANADA Bank $26,172,333 0.61% 468,283
Mega FRANKLIN RESOURCES INC $25,632,547 0.59% 458,625
Large Tidal Investments LLC $24,711,484 0.57% 442,145
Mid SOROS FUND MANAGEMENT LLC $24,504,970 0.57% 438,450
Mega RAYMOND JAMES FINANCIAL INC $23,679,472 0.55% 423,680
Large VOYA INVESTMENT MANAGEMENT LLC $23,327,367 0.54% 417,380
Mega Bank of New York Mellon Corp Bank $22,934,176 0.53% 410,345
Mega WELLINGTON MANAGEMENT GROUP LLP $22,124,389 0.51% 395,856
Mid EMERALD ADVISERS, LLC $21,336,789 0.49% 381,764
Large SILVERCREST ASSET MANAGEMENT GROUP LLC $21,322,146 0.49% 381,502
Large Freestone Grove Partners LP $20,421,870 0.47% 365,394
Mega JENNISON ASSOCIATES LLC $19,846,874 0.46% 355,106
Large FRED ALGER MANAGEMENT, LLC $19,110,914 0.44% 341,938
Mid PICTON MAHONEY ASSET MANAGEMENT $17,276,716 0.40% 309,120
Mid SEGALL BRYANT & HAMILL, LLC $16,868,272 0.39% 301,812
Large NEW YORK STATE COMMON RETIREMENT FUND Pension $16,698,702 0.39% 298,778
Mid PALISADE CAPITAL MANAGEMENT, LP $16,283,327 0.38% 291,346
Mid Penn Capital Management Company, LLC $15,469,290 0.36% 276,781
Large WCM INVESTMENT MANAGEMENT, LLC $14,384,856 0.33% 257,378
Large SEI INVESTMENTS CO $14,253,067 0.33% 255,020
Mid EMERALD MUTUAL FUND ADVISERS TRUST Mutual Fund $14,005,866 0.32% 250,597
Large Public Sector Pension Investment Board Pension $13,929,576 0.32% 249,232
Mid WHITTIER TRUST CO Bank $13,497,937 0.31% 241,509
Mega FMR LLC $12,427,587 0.29% 222,358
Large AGF MANAGEMENT LTD $10,473,226 0.24% 187,390
Mega RHUMBLINE ADVISERS $10,431,756 0.24% 186,648
Mega Legal & General Group Plc $8,832,351 0.20% 158,031
Large Thrivent Financial for Lutherans $7,911,061 0.18% 141,547
Mega JPMORGAN CHASE & CO $7,667,994 0.18% 137,198
Mid ROYCE & ASSOCIATES LP $7,657,433 0.18% 137,009
Large BNP PARIBAS ASSET MANAGEMENT Holding S.A. $7,633,400 0.18% 136,579
Mid MAIRS & POWER INC $7,439,853 0.17% 133,116
Mega Swiss National Bank Bank $7,260,111 0.17% 129,900
Large Cerity Partners LLC $6,901,687 0.16% 123,487
Mid WHITTIER TRUST CO OF NEVADA INC Bank $6,772,023 0.16% 121,167
Small ROBOTTI ROBERT $6,734,297 0.16% 120,492
Large Holocene Advisors, LP $6,715,407 0.16% 120,154
Small Pier Capital, LLC $6,644,706 0.15% 118,889
Mega BNP PARIBAS ARBITRAGE, SA $6,460,045 0.15% 115,585
Mega ALLIANCEBERNSTEIN L.P. $6,319,705 0.15% 113,074
Mid Sequoia Financial Advisors, LLC $6,315,122 0.15% 112,992
Mid HARBOR CAPITAL ADVISORS, INC. $5,879,124 0.14% 105,191
Mid Granahan Investment Management, LLC $5,828,320 0.13% 104,282
Mega ENVESTNET ASSET MANAGEMENT INC $5,747,727 0.13% 102,840
Large First Eagle Investment Management, LLC $5,261,261 0.12% 94,136
Mega CITIGROUP INC $5,014,617 0.12% 89,723
Large Caisse de depot et placement du Quebec $4,614,166 0.11% 82,558
Large CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Pension $4,339,634 0.10% 77,646
Large SEB Asset Management AB $4,286,595 0.10% 76,697
Large STATE OF WISCONSIN INVESTMENT BOARD $4,283,409 0.10% 76,640
Small Hilton Capital Management, LLC $4,168,052 0.10% 74,576
Large Caption Management, LLC $4,074,381 0.09% 72,900
Large PRUDENTIAL FINANCIAL INC $3,986,801 0.09% 71,333
Mid D.A. DAVIDSON & CO. $3,664,986 0.08% 65,575
Mega FIRST TRUST ADVISORS LP $3,647,996 0.08% 65,271
Mega VANGUARD ASSET MANAGEMENT, Ltd $3,470,880 0.08% 62,102
Large Squarepoint Ops LLC $3,267,105 0.08% 58,456

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