RDNT Institutional Ownership & Shareholders
RADNET INC (RDNT) is currently held by 328 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $5.03B based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
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 $805.29M, representing an estimated gain of +19.17% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 47% 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
328
Total Reported Value
$5.03B
Largest Holder
Blackrock, Inc.
Largest Position
$675.77M
Insider Transactions (90d)
0
Latest Filing Quarter
Q2 2026
New Institutional Positions
35
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 | $805,289,310 | +$129,521,304 | +19.17% | |
| Rtw Investments, Lp | 2.55% | 4,846,958 | $298,911,900 | $356,202,943 | +$57,291,043 | +19.17% | |
| Price T Rowe Associates Inc | 0.03% | 4,501,195 | $277,589,000 | $330,792,821 | +$53,203,821 | +19.17% | |
| Vanguard Portfolio Management Llc | 0.01% | 4,066,931 | $250,807,635 | $298,878,759 | +$48,071,124 | +19.17% | |
| Vanguard Capital Management Llc | 0.00% | 3,193,565 | $196,947,154 | $234,695,092 | +$37,747,938 | +19.17% | |
| Beck Mack & Oliver Llc | 3.80% | 3,163,592 | $195,098,719 | $232,492,376 | +$37,393,657 | +19.17% | |
| State Street Corp | 0.01% | 2,842,457 | $175,189,720 | $208,892,165 | +$33,702,445 | +19.24% | |
| Geode Capital Management, Llc | 0.01% | 1,858,508 | $114,635,615 | $136,581,753 | +$21,946,138 | +19.14% | |
| Invesco Ltd. | 0.01% | 1,641,292 | $101,218,478 | $120,618,549 | +$19,400,071 | +19.17% | |
| American Century Companies Inc | 0.04% | 1,618,424 | $99,808,315 | $118,937,980 | +$19,129,665 | +19.17% | |
| Clearbridge Investments, Llc | 0.08% | 1,546,652 | $95,382,033 | $113,663,455 | +$18,281,422 | +19.17% | |
| Dimensional Fund Advisors Lp | 0.02% | 1,491,040 | $91,938,537 | $109,576,530 | +$17,637,993 | +19.18% | |
| Hood River Capital Management Llc | 0.65% | 1,456,205 | $89,804,162 | $107,016,505 | +$17,212,343 | +19.17% | |
| Jb Capital Partners Lp | 13.59% | 1,424,061 | $87,821,842 | $104,654,243 | +$16,832,401 | +19.17% | |
| Bamco Inc | 0.12% | 1,260,992 | $77,765,377 | $92,670,302 | +$14,904,925 | +19.17% | |
| Defiance Etfs, Llc | 1.04% | 1,143,622 | $75,044,476 | $84,044,781 | +$9,000,305 | +11.99% | |
| Van Berkom & Associates Inc. | 2.37% | 1,193,068 | $73,577,000 | $87,678,567 | +$14,101,567 | +19.17% | |
| Goldman Sachs Group Inc | 0.01% | 1,178,372 | $72,670,185 | $86,598,558 | +$13,928,373 | +19.17% | |
| Alyeska Investment Group, L.P. | 0.19% | 1,171,721 | $72,260,034 | $86,109,776 | +$13,849,742 | +19.17% | |
| Penserra Capital Management Llc | 0.54% | 1,143,622 | $70,527,000 | $84,044,781 | +$13,517,781 | +19.17% | |
| Principal Financial Group Inc | 0.03% | 965,531 | $66,563,708 | $70,956,873 | +$4,393,165 | +6.60% | |
| Westfield Capital Management Co Lp | 0.20% | 975,542 | $60,161,675 | $71,692,582 | +$11,530,907 | +19.17% | |
| Morgan Stanley | 0.00% | 931,114 | $57,421,889 | $68,427,568 | +$11,005,679 | +19.17% | |
| Northern Trust Corp | 0.01% | 813,056 | $50,141,163 | $59,751,485 | +$9,610,322 | +19.17% | |
| Charles Schwab Investment Management Inc | 0.01% | 792,282 | $48,860,031 | $58,224,804 | +$9,364,773 | +19.17% | |
| Rockefeller Capital Management L.P. | 0.07% | 757,990 | $46,745,243 | $55,704,685 | +$8,959,442 | +19.17% | |
| Ameriprise Financial Inc | 0.01% | 745,603 | $45,981,485 | $54,794,364 | +$8,812,879 | +19.17% | |
| Global Alpha Capital Management Ltd. | 2.72% | 734,875 | $45,319,741 | $54,005,964 | +$8,686,223 | +19.17% | |
| Neuberger Berman Group Llc | 0.03% | 588,985 | $42,024,080 | $43,284,508 | +$1,260,428 | +3.00% | |
| Loomis Sayles & Co L P | 0.05% | 680,979 | $41,995,974 | $50,045,147 | +$8,049,173 | +19.17% | |
| Allspring Global Investments Holdings, Llc | 0.06% | 608,144 | $39,906,410 | $44,692,503 | +$4,786,093 | +11.99% | |
| Punch & Associates Investment Management, Inc. | 1.93% | 633,272 | $39,053,863 | $46,539,159 | +$7,485,296 | +19.17% | |
| Nuveen, Llc | 0.01% | 631,797 | $38,962,921 | $46,430,762 | +$7,467,841 | +19.17% | |
| Polar Capital Holdings Plc | 0.11% | 623,029 | $38,422,198 | $45,786,401 | +$7,364,203 | +19.17% | |
| Ubs Group Ag | 0.01% | 619,635 | $38,212,891 | $45,536,976 | +$7,324,085 | +19.17% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.01% | 673,249 | $37,627,888 | $49,477,069 | +$11,849,181 | +31.49% | |
| Voya Investment Management Llc | 0.03% | 604,907 | $37,304,615 | $44,454,615 | +$7,150,000 | +19.17% | |
| Vanguard Fiduciary Trust Co | 0.01% | 507,472 | $31,295,798 | $37,294,117 | +$5,998,319 | +19.17% | |
| Royal Bank Of Canada | 0.01% | 501,405 | $30,920,000 | $36,848,253 | +$5,928,253 | +19.17% | |
| Deutsche Bank Ag\ | 0.01% | 495,962 | $30,585,976 | $36,448,247 | +$5,862,271 | +19.17% | |
| Point72 Asset Management, L.P. | 0.05% | 492,437 | $30,368,590 | $36,189,195 | +$5,820,605 | +19.17% | |
| Alpha Wave Global, Lp | 0.47% | 472,643 | $29,147,894 | $34,734,534 | +$5,586,640 | +19.17% | |
| Norges Bank | 0.00% | 469,820 | $28,973,799 | $34,527,072 | +$5,553,273 | +19.17% | |
| Millennium Management Llc | 0.02% | 465,622 | $28,714,909 | $34,218,561 | +$5,503,652 | +19.17% | |
| E. Ohman J:Or Asset Management Ab | 0.61% | 397,856 | $27,428,193 | $29,238,437 | +$1,810,244 | +6.60% | |
| Tidal Investments Llc | 0.07% | 439,560 | $27,107,665 | $32,303,264 | +$5,195,599 | +19.17% | |
| Bank Of America Corp | 0.00% | 420,661 | $25,942,163 | $30,914,377 | +$4,972,214 | +19.17% | |
| Bank Of New York Mellon Corp | 0.00% | 420,575 | $25,936,841 | $30,908,057 | +$4,971,216 | +19.17% | |
| Bessemer Group Inc | 0.03% | 397,383 | $24,506,000 | $29,203,677 | +$4,697,677 | +19.17% | |
| Emerald Advisers, Llc | 0.54% | 370,489 | $22,848,057 | $27,227,237 | +$4,379,180 | +19.17% |
Frequently asked questions about RDNT
Who are the largest institutional holders of RDNT?
The largest institutional holders of RDNT reported in the latest SEC Form 13F filings include Blackrock, Inc., Rtw Investments, Lp, Price T Rowe Associates Inc, Vanguard Portfolio Management Llc, and Vanguard Capital Management Llc. InsiderSet ranks institutional holders by their latest reported RDNT position.
What is RDNT institutional ownership?
This page tracks RDNT positions reported by institutional investment managers through SEC Form 13F. RADNET INC (RDNT) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own RDNT?
InsiderSet currently tracks 328 institutional managers reporting RDNT holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of RDNT shareholders.
How much RDNT stock do institutions own?
Institutional investment managers disclosed approximately $5.03B in RDNT holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was RDNT institutional ownership last updated?
The latest RDNT institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional RDNT holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its RDNT position after the reporting date.
Are institutions buying or selling RDNT?
Institutional buying and selling can be analyzed by comparing RDNT positions across consecutive 13F reporting periods. InsiderSet's RDNT Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View RDNT ownership changes.
How has RDNT institutional ownership changed over time?
InsiderSet tracks RDNT institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.