RADNET INC (RDNT) Institutional Shareholders
RADNET INC (RDNT) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $5.01B in RDNT holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of RDNT tracked by InsiderSet, reporting ownership valued at approximately $675.77M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $830.38M, representing an estimated gain of +22.88% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 48% of the total disclosed RDNT value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Rtw Investments, Lp, Price T Rowe Associates Inc, and several other long-term asset managers with concentrated positions in RADNET INC (RDNT).
This page ranks the largest institutional RDNT shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
314
Total Reported Value
$5.01B
Largest Holder
Blackrock, Inc.
Largest Position
$675.77M
Insider Transactions (90d)
0
Latest Filing Quarter
Q2 2026
New Institutional Positions
37
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.01% | 10,957,808 | $675,768,006 | $830,382,690 | +$154,614,684 | +22.88% | |
| Rtw Investments, Lp | 2.55% | 4,846,958 | $298,911,900 | $367,302,477 | +$68,390,577 | +22.88% | |
| Price T Rowe Associates Inc | 0.03% | 4,501,195 | $277,589,000 | $341,100,557 | +$63,511,557 | +22.88% | |
| Vanguard Portfolio Management Llc | 0.01% | 4,066,931 | $250,807,635 | $308,192,031 | +$57,384,396 | +22.88% | |
| Vanguard Capital Management Llc | 0.00% | 3,193,565 | $196,947,154 | $242,008,356 | +$45,061,202 | +22.88% | |
| Beck Mack & Oliver Llc | 3.80% | 3,163,592 | $195,098,719 | $239,737,002 | +$44,638,283 | +22.88% | |
| State Street Corp | 0.01% | 2,842,457 | $175,189,720 | $215,401,391 | +$40,211,671 | +22.95% | |
| Geode Capital Management, Llc | 0.01% | 1,858,508 | $114,635,615 | $140,837,736 | +$26,202,121 | +22.86% | |
| Invesco Ltd. | 0.01% | 1,641,292 | $101,218,478 | $124,377,108 | +$23,158,630 | +22.88% | |
| American Century Companies Inc | 0.04% | 1,618,424 | $99,808,315 | $122,644,171 | +$22,835,856 | +22.88% | |
| Clearbridge Investments, Llc | 0.08% | 1,546,652 | $95,382,033 | $117,205,289 | +$21,823,256 | +22.88% | |
| Dimensional Fund Advisors Lp | 0.02% | 1,491,040 | $91,938,537 | $112,991,011 | +$21,052,474 | +22.90% | |
| Hood River Capital Management Llc | 0.65% | 1,456,205 | $89,804,162 | $110,351,215 | +$20,547,053 | +22.88% | |
| Jb Capital Partners Lp | 13.59% | 1,424,061 | $87,821,842 | $107,915,343 | +$20,093,501 | +22.88% | |
| Bamco Inc | 0.12% | 1,260,992 | $77,765,377 | $95,557,974 | +$17,792,597 | +22.88% | |
| Defiance Etfs, Llc | 1.04% | 1,143,622 | $75,044,476 | $86,663,675 | +$11,619,199 | +15.48% | |
| Van Berkom & Associates Inc. | 2.37% | 1,193,068 | $73,577,000 | $90,410,693 | +$16,833,693 | +22.88% | |
| Goldman Sachs Group Inc | 0.01% | 1,178,372 | $72,670,185 | $89,297,030 | +$16,626,845 | +22.88% | |
| Alyeska Investment Group, L.P. | 0.19% | 1,171,721 | $72,260,034 | $88,793,017 | +$16,532,983 | +22.88% | |
| Penserra Capital Management Llc | 0.54% | 1,143,622 | $70,527,000 | $86,663,675 | +$16,136,675 | +22.88% | |
| Principal Financial Group Inc | 0.03% | 1,052,356 | $64,898,794 | $79,747,538 | +$14,848,744 | +22.88% | |
| Westfield Capital Management Co Lp | 0.20% | 975,542 | $60,161,675 | $73,926,573 | +$13,764,898 | +22.88% | |
| Morgan Stanley | 0.00% | 931,114 | $57,421,889 | $70,559,819 | +$13,137,930 | +22.88% | |
| Northern Trust Corp | 0.01% | 813,056 | $50,141,163 | $61,613,384 | +$11,472,221 | +22.88% | |
| Charles Schwab Investment Management Inc | 0.01% | 792,282 | $48,860,031 | $60,039,130 | +$11,179,099 | +22.88% | |
| Rockefeller Capital Management L.P. | 0.07% | 757,990 | $46,745,243 | $57,440,482 | +$10,695,239 | +22.88% | |
| Ameriprise Financial Inc | 0.01% | 745,603 | $45,981,485 | $56,501,795 | +$10,520,310 | +22.88% | |
| Global Alpha Capital Management Ltd. | 2.72% | 734,875 | $45,319,741 | $55,688,828 | +$10,369,087 | +22.88% | |
| Loomis Sayles & Co L P | 0.05% | 680,979 | $41,995,974 | $51,604,589 | +$9,608,615 | +22.88% | |
| Allspring Global Investments Holdings, Llc | 0.06% | 608,144 | $39,906,410 | $46,085,152 | +$6,178,742 | +15.48% | |
| Punch & Associates Investment Management, Inc. | 1.93% | 633,272 | $39,053,863 | $47,989,352 | +$8,935,489 | +22.88% | |
| Nuveen, Llc | 0.01% | 631,797 | $38,962,921 | $47,877,577 | +$8,914,656 | +22.88% | |
| Polar Capital Holdings Plc | 0.11% | 623,029 | $38,422,198 | $47,213,138 | +$8,790,940 | +22.88% | |
| Ubs Group Ag | 0.01% | 619,635 | $38,212,891 | $46,955,940 | +$8,743,049 | +22.88% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.01% | 673,249 | $37,627,888 | $51,018,809 | +$13,390,921 | +35.59% | |
| Voya Investment Management Llc | 0.03% | 604,907 | $37,304,615 | $45,839,852 | +$8,535,237 | +22.88% | |
| Vanguard Fiduciary Trust Co | 0.01% | 507,472 | $31,295,798 | $38,456,228 | +$7,160,430 | +22.88% | |
| Royal Bank Of Canada | 0.01% | 501,405 | $30,920,000 | $37,996,471 | +$7,076,471 | +22.89% | |
| Deutsche Bank Ag\ | 0.01% | 495,962 | $30,585,976 | $37,584,000 | +$6,998,024 | +22.88% | |
| Point72 Asset Management, L.P. | 0.05% | 492,437 | $30,368,590 | $37,316,876 | +$6,948,286 | +22.88% | |
| Alpha Wave Global, Lp | 0.47% | 472,643 | $29,147,894 | $35,816,887 | +$6,668,993 | +22.88% | |
| Norges Bank | 0.00% | 469,820 | $28,973,799 | $35,602,960 | +$6,629,161 | +22.88% | |
| Millennium Management Llc | 0.02% | 465,622 | $28,714,909 | $35,284,835 | +$6,569,926 | +22.88% | |
| Neuberger Berman Group Llc | 0.02% | 455,763 | $28,106,904 | $34,537,720 | +$6,430,816 | +22.88% | |
| E. Ohman J:Or Asset Management Ab | 0.65% | 452,966 | $27,934,413 | $34,325,763 | +$6,391,350 | +22.88% | |
| Tidal Investments Llc | 0.07% | 439,560 | $27,107,665 | $33,309,857 | +$6,202,192 | +22.88% | |
| Bank Of America Corp | 0.00% | 420,661 | $25,942,163 | $31,877,691 | +$5,935,528 | +22.88% | |
| Bank Of New York Mellon Corp | 0.00% | 420,575 | $25,936,841 | $31,871,174 | +$5,934,333 | +22.88% | |
| Bessemer Group Inc | 0.03% | 397,383 | $24,506,000 | $30,113,684 | +$5,607,684 | +22.88% | |
| Emerald Advisers, Llc | 0.54% | 370,489 | $22,848,057 | $28,075,656 | +$5,227,599 | +22.88% |
Frequently asked questions about RDNT
Who owns the most RDNT stock?
The largest holders of RDNT are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for RADNET INC (RDNT).
Is RDNT widely held by superinvestors?
Many widely followed stocks like RDNT appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly RDNT is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.