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RadNet, Inc. (RDNT) institutional ownership

Latest close $61.51 Jul 27, 2026
Market cap$4.2B 52-week range SectorHealthcare
Funds holding · Q1 2026
330
reported RDNT position changes
Top owners · Q1 2026
No disclosed owners are available.
Institutional activity · Q1 2026
Activity unavailable N/A
182 buyers · 148 sellers

RadNet, Inc. (RDNT) price and institutional activity

Dates

Q1 2026

$0 bought by 182 investors
T. Rowe Price AssociatesPoint72 Asset Management, L.P. +180 more
$0 sold by 148 investors
T. Rowe Price Investment Management, Inc.Adage Capital Partners Gp, L.L.C. +146 more
Bought Sold Totals per quarter; hover a bar for the names.

RadNet, Inc. (RDNT) institutional activity · 330

Investor Type Est. change Change Δ Own Date
T. Rowe Price Associates · Added
Change +1.5M Date Q1 2026
T. Rowe Price Associates Added· Q1 2026 +1.5M Q1 2026
T. Rowe Price Investment Management, Inc. · Exited
Change −823K Δ Own −100.0% Date Q1 2026
T. Rowe Price Investment Management, Inc. Exited· Q1 2026 −823K −100.0% Q1 2026
Point72 Asset Management, L.P. · Added
Change +598K Δ Own +232.0% Date Q1 2026
Point72 Asset Management, L.P. Added· Q1 2026 +598K +232.0% Q1 2026
Adage Capital Partners Gp, L.L.C. · Exited
Change −477K Δ Own −100.0% Date Q1 2026
Adage Capital Partners Gp, L.L.C. Exited· Q1 2026 −477K −100.0% Q1 2026
Norges · Exited
Change −451K Δ Own −100.0% Date Q1 2026
Norges Exited· Q1 2026 −451K −100.0% Q1 2026
Rtw Investments, LP · Added
Change +346K Date Q1 2026
Rtw Investments, LP Added· Q1 2026 +346K Q1 2026
Millennium Management LLC · Reduced
Change −334K Date Q1 2026
Millennium Management LLC Reduced· Q1 2026 −334K Q1 2026
Ameriprise Financial Inc · Reduced
Change −221K Date Q1 2026
Ameriprise Financial Inc Reduced· Q1 2026 −221K Q1 2026
Fred Alger Management, LLC · Reduced
Change −206K Date Q1 2026
Fred Alger Management, LLC Reduced· Q1 2026 −206K Q1 2026
Van Berkom & Associates Inc. · Added
Change +205K Date Q1 2026
Van Berkom & Associates Inc. Added· Q1 2026 +205K Q1 2026
Integral Health Asset Management, LLC · Exited
Change −200K Δ Own −100.0% Date Q1 2026
Integral Health Asset Management, LLC Exited· Q1 2026 −200K −100.0% Q1 2026
Jane Street Group, LLC · Exited
Change −196K Δ Own −100.0% Date Q1 2026
Jane Street Group, LLC Exited· Q1 2026 −196K −100.0% Q1 2026
Freestone Grove Partners LP · Added
Change +184K Date Q1 2026
Freestone Grove Partners LP Added· Q1 2026 +184K Q1 2026
Allspring Global Investments Holdings, LLC · Reduced
Change −183K Date Q1 2026
Allspring Global Investments Holdings, LLC Reduced· Q1 2026 −183K Q1 2026
UBS Group AG · Added
Change +171K Date Q1 2026
UBS Group AG Added· Q1 2026 +171K Q1 2026
Data through Q1 2026 · filed Jun 9, 2026
15 of 330

Famous investor activity in RadNet, Inc. (RDNT)

RadNet, Inc. (RDNT) insider trading

Company insiders, action and economics first; trade and filed dates last.
Dates
Insider Title Type Price Qty Value Owned ΔOwn Trade date Filed date
Swartz David L. · Director Sell −$145K
Price $53.89 Qty −3K Owned 177K ΔOwn −1.5% Trade date Jun 18, 2026 Filed date Jun 22, 2026
Swartz David L. Director Sell $53.89 −3K −$145K 177K −1.5% Jun 18, 2026 Jun 22, 2026
Wesdorp Cornelis · Officer Sell −$276K
Price $58.11 Qty −5K Owned 69K Trade date Jun 16, 2026 Filed date Jun 18, 2026
Wesdorp Cornelis Officer Sell $58.11 −5K −$276K 69K Jun 16, 2026 Jun 18, 2026
Berger Howard G. · Director Gift (G) -90
Owned 20K Trade date Jun 16, 2026 Filed date Jun 18, 2026
Berger Howard G. Director Gift (G) -90 20K Jun 16, 2026 Jun 18, 2026
Forthuber Stephen M. · Officer 2 operations −$2.6M
Price $57.79–$58.61 Qty −44K Owned 507K Trade date Jun 15, 2026 Filed date Jun 16, 2026
Forthuber Stephen M. Officer 2 operations $57.79–$58.61 −44K −$2.6M 507K Jun 15, 2026 Jun 16, 2026
Swartz David L. · Director Grant (A) 3K
Owned 180K Trade date Jun 2, 2026 Filed date Jun 3, 2026
Swartz David L. Director Grant (A) 3K 180K Jun 2, 2026 Jun 3, 2026
Spurlock Gregory E. · Director Grant (A) 3K
Owned 8K Trade date Jun 2, 2026 Filed date Jun 3, 2026
Spurlock Gregory E. Director Grant (A) 3K 8K Jun 2, 2026 Jun 3, 2026
Jacobs Laura Pastre · Director Grant (A) 3K
Owned 30K Trade date Jun 2, 2026 Filed date Jun 3, 2026
Jacobs Laura Pastre Director Grant (A) 3K 30K Jun 2, 2026 Jun 3, 2026
Levitt Lawrence L. · Director Grant (A) 3K
Owned 168K Trade date Jun 2, 2026 Filed date Jun 3, 2026
Levitt Lawrence L. Director Grant (A) 3K 168K Jun 2, 2026 Jun 3, 2026
Berger Howard G. · Director 2 operations 0
Price $18.64 Owned 26K Trade date May 5, 2026 Filed date May 6, 2026
Berger Howard G. Director 2 operations $18.64 0 26K May 5, 2026 May 6, 2026
Sorensen Alma Gregory · Director, Officer 3 operations −$933K
Price $61.84–$63.59 Qty −15K Owned 1.2M Trade date Mar 19, 2026 Filed date Mar 23, 2026
Sorensen Alma Gregory Director, Officer 3 operations $61.84–$63.59 −15K −$933K 1.2M Mar 19, 2026 Mar 23, 2026
Sorensen Alma Gregory · Director, Officer Gift (G) -7K
Owned 1.2M Trade date Mar 19, 2026 Filed date Mar 23, 2026
Sorensen Alma Gregory Director, Officer Gift (G) -7K 1.2M Mar 19, 2026 Mar 23, 2026
Sorensen Alma Gregory · Director 2 operations −$932K
Price $62.12–$62.72 Qty −15K Owned 1.2M Trade date Mar 18, 2026 Filed date Mar 18, 2026
Sorensen Alma Gregory Director 2 operations $62.12–$62.72 −15K −$932K 1.2M Mar 18, 2026 Mar 18, 2026
Sorensen Alma Gregory · Director Tax withholding or exercise payment (F) -$365K
Price $61.72 Qty -6K Owned 1.2M Trade date Mar 16, 2026 Filed date Mar 18, 2026
Sorensen Alma Gregory Director Tax withholding or exercise payment (F) $61.72 -6K -$365K 1.2M Mar 16, 2026 Mar 18, 2026
Sorensen Alma Gregory · Director, Officer 16 operations 0
Owned 0 Trade date Mar 10, 2026 Filed date Mar 12, 2026
Sorensen Alma Gregory Director, Officer 16 operations 0 0 Mar 10, 2026 Mar 12, 2026
Patel Mital · Officer Grant (A) 21K
Owned 200K Trade date Mar 3, 2026 Filed date Mar 5, 2026
Patel Mital Officer Grant (A) 21K 200K Mar 3, 2026 Mar 5, 2026
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15 of 44 Sign in to continue to older insider transactions.

RadNet, Inc. (RDNT) activist and large shareholders

Dates
Owner/Filer identity Shares reported % of shares outstanding Filing date
BlackRock Inc. 8.9M
% of shares outstanding 13.1% Filing date Jan 23, 2024
BlackRock Inc. 8.9M 13.1% Jan 23, 2024
Vanguard Group Inc 7.4M
% of shares outstanding 9.9% Filing date Nov 12, 2024
Vanguard Group Inc 7.4M 9.9% Nov 12, 2024
Kaminsky Sandy Nyholm 4.6M
% of shares outstanding 6.2% Filing date Oct 24, 2024
Kaminsky Sandy Nyholm 4.6M 6.2% Oct 24, 2024
T. Rowe Price Associates, Inc. 4.2M
% of shares outstanding 5.4% Filing date May 15, 2026
T. Rowe Price Associates, Inc. 4.2M 5.4% May 15, 2026
Vanguard Portfolio Management 4.0M
% of shares outstanding 5.1% Filing date Apr 29, 2026
Vanguard Portfolio Management 4.0M 5.1% Apr 29, 2026
Beck Mack & Oliver LLC 3.2M
% of shares outstanding 4.8% Filing date Feb 14, 2024
Beck Mack & Oliver LLC 3.2M 4.8% Feb 14, 2024
Jb Capital Partners LP 2.1M
% of shares outstanding 4.0% Filing date Aug 3, 2021
Jb Capital Partners LP 2.1M 4.0% Aug 3, 2021
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RadNet, Inc. (RDNT) ownership FAQ

Who owns RDNT?

330 reporting institutions disclosed RDNT position changes in the Q1 2026 snapshot.

How is institutional activity calculated?

For each manager, WhoBought compares accepted consecutive 13F share counts. Share change is current shares minus prior shares. Estimated dollar change is that signed share change multiplied by the split-adjusted quarter-mean close. The activity table on this page uses Q1 2026.

What are activist and large shareholder filings?

An investor crossing 5% of a share class generally files Schedule 13D for activist intent or Schedule 13G for a passive position. The technical form names appear here rather than in the activity rows.

Where does this data come from?

Ownership and institutional activity come from SEC Form 13F filings. Insider activity comes from SEC Form 4, and large-shareholder activity from SEC Schedules 13D and 13G. FMP supplies price data only. Company logos use the local verified Parqet cache with one shared fallback.

Why are ownership reports delayed?

Form 13F is a quarterly disclosure and is normally filed after the quarter ends. Every ownership and activity value therefore names its represented period; it is not presented as a live position.

How are missing table values shown?

A muted dash marks a missing table value. It means the filing omitted the value, comparable data is unavailable, or no prior position exists for comparison.