RadNet, Inc. (RDNT) shareholders
RDNTNasdaqServices-Medical LaboratoriesFiscal year ends December 31
Financials through Q3 FY2026, quarter ended Sep 30, 2026Last filing: 10-Q on Nov 9, 2026Score 7/3056% above fair value
$76.42+0.38 (+0.50%)
Close on Nov 13, 2026Market cap $6.01BP/E –Yield –
Ownership
Institutional holdings as of Jun 30, 2026, from 13F filings
Held by institutions
100.0%
82M of 79M shares
Institutional holders
328
42 new, 50 sold out
Net institutional buying
3M
In Q2 2026
Insider trades, 12 months
0 buys · 16 sales
Net sold $15.79M
Shares held by institutions
Holders of more than 5%
Latest Schedule 13D (active) or 13G (passive) filed by each holder
| Holder | Shares | % of class | Filing | As of |
|---|---|---|---|---|
| BlackRock, Inc. | 9,250,663 | 12.00% | 13G (passive) amendment | Sep 30, 2025 |
| RTW Investments, LP Joint filing with Roderick Wong (6.20%) | 4,846,958 | 6.20% | 13G (passive) amendment | Jun 30, 2026 |
| Sandy Nyholm Kaminsky, as trustee of the HFB Heirs' Trust II (formerly HFB Heirs' Family Trust) | 4,551,753 | 6.16% | 13G (passive) amendment | Sep 30, 2024 |
| T. Rowe Price Associates, Inc. | 4,154,837 | 5.40% | 13G (passive) | Mar 31, 2026 |
| Vanguard Portfolio Management | 3,952,160 | 5.09% | 13G (passive) | Mar 31, 2026 |
| Roderick Wong Joint filing with RTW Investments, LP (5.10%) | 3,938,500 | 5.10% | 13G (passive) | Dec 31, 2025 |
Top institutional holders
13F holdings as of Jun 30, 2026
| Holder | Shares | % of RDNT | Value | Change | % of portfolio |
|---|---|---|---|---|---|
| BlackRock, Inc. | 10,957,808 | 13.92% | $675.77M | +922,074 | 0.01% |
| Rtw Investments, LP | 4,846,958 | 6.16% | $298.91M | +561,958 | 2.55% |
| Price T Rowe Associates Inc /Md/ | 4,501,195 | 5.72% | $277.59M | +346,332 | 0.03% |
| Vanguard Portfolio Management LLC | 4,066,931 | 5.17% | $250.81M | +167,804 | 0.01% |
| Vanguard Capital Management LLC | 3,193,565 | 4.06% | $196.95M | +82,553 | 0.00% |
| Beck Mack & Oliver LLC | 3,163,592 | 4.02% | $195.10M | −2,600 | 3.80% |
| State Street Corp | 2,842,457 | 3.61% | $175.19M | +190,859 | 0.01% |
| Geode Capital Management, LLC | 1,858,508 | 2.36% | $114.64M | +134,901 | 0.01% |
| Invesco Ltd. | 1,641,292 | 2.09% | $101.22M | +7,797 | 0.01% |
| American Century Companies Inc | 1,618,424 | 2.06% | $99.81M | +716,232 | 0.04% |
| Clearbridge Investments, LLC | 1,546,652 | 1.97% | $95.38M | +268,112 | 0.08% |
| Dimensional Fund Advisors LP | 1,491,040 | 1.89% | $91.94M | +112,037 | 0.02% |
| Hood River Capital Management LLC | 1,456,205 | 1.85% | $89.80M | +44,708 | 0.65% |
| Jb Capital Partners LP | 1,424,061 | 1.81% | $87.82M | – | 13.59% |
| Bamco Inc /Ny/ | 1,260,992 | 1.60% | $77.77M | +450,926 | 0.12% |
| Van Berkom & Associates Inc. | 1,193,068 | 1.52% | $73.58M | −864,104 | 2.37% |
| Goldman Sachs Group Inc | 1,178,372 | 1.50% | $72.67M | −11,903 | 0.01% |
| Alyeska Investment Group, L.P. | 1,171,721 | 1.49% | $72.26M | −137,587 | 0.19% |
| Penserra Capital Management LLC | 1,143,622 | 1.45% | $70.53M | +598,148 | 0.54% |
| Defiance ETFs, LLC | 1,143,622 | 1.45% | $75.04M | +598,148 | 1.02% |
Institutional buying and selling by quarter
Positions opened, added to, reduced and closed by 13F filers
| Quarter | Holders | Shares held | % of shares | New / added | Reduced / closed | Shares bought | Shares sold |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 328 | 82M | 100.0% | 42 / 128 | 114 / 50 | 10M | 6M |
| Q1 2026 | 340 | 78M | 99.4% | 52 / 136 | 103 / 48 | 15M | 6M |
| Q4 2025 | 342 | 77M | 98.0% | 53 / 123 | 114 / 32 | 8M | 5M |
| Q3 2025 | 328 | 74M | 94.3% | 43 / 145 | 95 / 40 | 9M | 6M |
| Q2 2025 | 328 | 71M | 90.8% | 47 / 154 | 87 / 25 | 6M | 4M |
| Q1 2025 | 307 | 69M | 87.7% | 45 / 124 | 104 / 65 | 11M | 6M |
| Q4 2024 | 330 | 64M | 81.7% | 54 / 115 | 116 / 21 | 6M | 5M |
| Q3 2024 | 303 | 64M | 81.1% | 55 / 104 | 99 / 26 | 16M | 4M |
| Q2 2024 | 277 | 61M | 77.8% | 47 / 97 | 96 / 45 | 7M | 6M |
| Q1 2024 | 277 | 61M | 77.4% | 79 / 91 | 72 / 15 | 11M | 4M |
| Q4 2023 | 214 | 54M | 68.6% | 39 / 69 | 76 / 14 | 5M | 4M |
| Q3 2023 | 191 | 53M | 67.1% | 40 / 76 | 48 / 30 | 7M | 5M |
Top mutual fund and ETF holders
Latest monthly portfolio reports (Form N-PORT)
370 funds held RDNT in Q2 2026, 47% of their shares through ETFs. Each fund counts once per quarter, from its quarter-end report.
| Fund | Shares | % of RDNT | Value | % of fund | As of |
|---|---|---|---|---|---|
| iShares Core S&P Small-Cap ETF | 3,513,849 | 4.47% | $216.70M | 0.19% | Jun 30, 2026 |
| Vanguard Total Stock Market Index Fund | 2,252,511 | 2.86% | $138.91M | 0.01% | Jun 30, 2026 |
| iShares Russell 2000 ETF | 1,836,559 | 2.33% | $113.26M | 0.14% | Jun 30, 2026 |
| T. Rowe Price Mid-Cap Value Fund, Inc. | 1,756,598 | 2.23% | $108.33M | 0.66% | Jun 30, 2026 |
| Vanguard Small-Cap Index Fund | 1,623,822 | 2.06% | $100.14M | 0.05% | Jun 30, 2026 |
| Defiance Quantum ETF | 1,143,622 | 1.45% | $70.53M | 1.13% | Jun 30, 2026 |
| Baron Small Cap Fund | 1,000,000 | 1.27% | $61.67M | 2.17% | Jun 30, 2026 |
| Small Cap Growth Fund | 981,113 | 1.25% | $62.58M | 1.12% | Jul 31, 2026 |
| Vanguard Small-Cap Growth Index Fund | 935,198 | 1.19% | $57.67M | 0.12% | Jun 30, 2026 |
| Vanguard Explorer Fund | 923,146 | 1.17% | $58.88M | 0.27% | Jul 31, 2026 |
| Vanguard Extended Market Index Fund | 812,359 | 1.03% | $50.10M | 0.05% | Jun 30, 2026 |
| Invesco Discovery Fund | 785,552 | 1.00% | $43.62M | 0.56% | May 31, 2026 |
| Fidelity Small Cap Index Fund | 782,110 | 0.99% | $49.88M | 0.15% | Jul 31, 2026 |
| Hood River Small-Cap Growth Fund | 728,645 | 0.93% | $44.94M | 0.68% | Jun 30, 2026 |
| iShares Russell 2000 Growth ETF | 660,604 | 0.84% | $40.74M | 0.26% | Jun 30, 2026 |
Officers, directors and major owners
People who filed Forms 3, 4 or 5 in the last two years
| Name | Role | Shares owned | % of shares | Latest filing |
|---|---|---|---|---|
| Howard G. Berger | President, CEO, Director | 518,315 | 0.66% | Jun 18, 2026 |
| Alma Gregory Sorensen | Chief Strategy Officer, Director | 1,218,351 | 1.55% | Mar 23, 2026 |
| Mital Patel | EVP, Chief Operating Officer | 154,874 | 0.20% | Nov 12, 2026 |
| Cornelis Wesdorp | Pres & CEO, Digital Health | 69,075 | 0.09% | Jun 18, 2026 |
| Stephen M. Forthuber | Pres & CEO-Eastern Operations | 527,052 | 0.67% | Jun 16, 2026 |
| Norman R. Hames | Pres and COO-West Operations | 284,217 | 0.36% | Mar 5, 2026 |
| Michael N. Murdock | EVP, Mergers and Acquisitions | 46,697 | 0.06% | Mar 5, 2026 |
| Mark Stolper | EVP, Chief Financial Officer | 121,943 | 0.15% | Mar 5, 2026 |
| David Jeffrey Katz | EVP and Chief Legal Officer | 90,866 | 0.12% | Mar 5, 2026 |
| Ranjan Jayanathan | Chief Information Officer | 138,198 | 0.18% | Aug 21, 2025 |
| David L. Swartz | Director | 214,032 | 0.27% | Jun 22, 2026 |
| Laura Pastre Jacobs | Director | 29,953 | 0.04% | Jun 3, 2026 |
| Gregory E. Spurlock | Director | 8,236 | 0.01% | Jun 3, 2026 |
| Lawrence L. Levitt | Director | 167,902 | 0.21% | Jun 3, 2026 |
Insider trades
Common stock transactions reported on Form 4, newest first
| Insider | Date | Transaction | Shares | Price | Value | Shares after |
|---|---|---|---|---|---|---|
| Mital Patel EVP, Chief Operating Officer | Nov 12, 2026 | Gift | −640 | – | – | 154,874 |
| Mital Patel EVP, Chief Operating Officer | Nov 11, 2026 | Sale | −44,661 | $78.51 | $3.51M | 155,514 |
| David L. Swartz Director | Jun 18, 2026 | Sale | −2,699 | $53.89 | $145.45K | 177,013 |
| Howard G. Berger President, CEO, Director | Jun 16, 2026 | Gift | −90 | – | – | 19,910 |
| Cornelis Wesdorp Pres & CEO, Digital Health | Jun 16, 2026 | Sale | −4,750 | $58.11 | $276.02K | 69,075 |
| Stephen M. Forthuber Pres & CEO-Eastern Operations | Jun 15, 2026 | Sale | −24,214 | $57.79 | $1.40M | 527,052 |
| Stephen M. Forthuber Pres & CEO-Eastern Operations | Jun 15, 2026 | Sale | −19,853 | $58.61 | $1.16M | 507,199 |
| Lawrence L. Levitt Director | Jun 2, 2026 | Award | +2,946 | – | – | 167,902 |
| Laura Pastre Jacobs Director | Jun 2, 2026 | Award | +2,946 | – | – | 29,953 |
| Gregory E. Spurlock Director | Jun 2, 2026 | Award | +2,946 | – | – | 8,236 |
| David L. Swartz Director | Jun 2, 2026 | Award | +2,946 | – | – | 179,712 |
| Howard G. Berger President, CEO, Director | May 5, 2026 | Option exercise | +25,992 | $18.64 | $484.49K | 498,405 |
| Alma Gregory Sorensen Chief Strategy Officer, Director | Mar 19, 2026 | Gift | −7,000 | – | – | 1,201,923 |
| Alma Gregory Sorensen Chief Strategy Officer, Director | Mar 19, 2026 | Sale | −9,554 | $61.84 | $590.82K | 1,214,369 |
| Alma Gregory Sorensen Chief Strategy Officer, Director | Mar 19, 2026 | Sale | −100 | $63.59 | $6.36K | 1,208,923 |
| Alma Gregory Sorensen Chief Strategy Officer, Director | Mar 19, 2026 | Sale | −5,346 | $62.82 | $335.84K | 1,209,023 |
| Alma Gregory Sorensen Chief Strategy Officer, Director | Mar 18, 2026 | Sale | −14,200 | $62.12 | $882.10K | 1,224,723 |
| Alma Gregory Sorensen Chief Strategy Officer, Director | Mar 18, 2026 | Sale | −800 | $62.72 | $50.18K | 1,223,923 |
| Alma Gregory Sorensen Chief Strategy Officer, Director | Mar 16, 2026 | Tax withholding | −5,919 | $61.72 | $365.32K | 1,238,923 |
| Alma Gregory Sorensen Chief Strategy Officer, Director | Mar 10, 2026 | Option exercise | +7,481 | – | – | 1,204,325 |
| Alma Gregory Sorensen Chief Strategy Officer, Director | Mar 10, 2026 | Option exercise | +2,493 | – | – | 1,228,011 |
| Alma Gregory Sorensen Chief Strategy Officer, Director | Mar 10, 2026 | Option exercise | +12,466 | – | – | 1,225,518 |
| Alma Gregory Sorensen Chief Strategy Officer, Director | Mar 10, 2026 | Option exercise | +8,727 | – | – | 1,213,052 |
| Alma Gregory Sorensen Chief Strategy Officer, Director | Mar 10, 2026 | Option exercise | +16,831 | – | – | 1,244,842 |
| Alma Gregory Sorensen Chief Strategy Officer, Director | Mar 10, 2026 | Option exercise | +6,237 | – | – | 1,196,844 |
| Alma Gregory Sorensen Chief Strategy Officer, Director | Mar 10, 2026 | Option exercise | +4,987 | – | – | 1,190,607 |
| Alma Gregory Sorensen Chief Strategy Officer, Director | Mar 10, 2026 | Option exercise | +3,742 | – | – | 1,185,620 |
| Mital Patel EVP of Fin Planning, CAO | Mar 3, 2026 | Award | +20,667 | – | – | 200,175 |
| Michael N. Murdock EVP, Mergers and Acquisitions | Mar 3, 2026 | Award | +6,613 | – | – | 46,697 |
| David Jeffrey Katz EVP and Chief Legal Officer | Mar 3, 2026 | Award | +19,289 | – | – | 90,866 |
| Stephen M. Forthuber Pres & COO-Eastern Operations | Mar 3, 2026 | Award | +22,045 | – | – | 551,266 |
| Cornelis Wesdorp Pres & CEO, Digital Health | Mar 3, 2026 | Award | +20,330 | – | – | 73,825 |
| Mark Stolper EVP, Chief Financial Officer | Mar 3, 2026 | Award | +18,228 | – | – | 121,943 |
| Alma Gregory Sorensen EVP, Chief Science Officer, Director | Mar 3, 2026 | Award | +16,533 | – | – | 1,181,878 |
| Howard G. Berger President, CEO, Director | Mar 3, 2026 | Award | +124,001 | – | – | 472,413 |
| Norman R. Hames Pres and COO-West Operations | Mar 3, 2026 | Award | +3,100 | – | – | 22,989 |
| Norman R. Hames Pres and COO-West Operations | Mar 3, 2026 | Award | +22,045 | – | – | 261,228 |
| Mark Stolper EVP, Chief Financial Officer | Dec 10, 2025 | Option exercise | +35,703 | $6.07 | $216.72K | 103,715 |
| David Jeffrey Katz EVP and Chief Legal Officer | Dec 10, 2025 | Option exercise | +3,396 | $29.44 | $99.98K | 71,577 |
| Stephen M. Forthuber Pres & COO-Eastern Operations | Dec 5, 2025 | Sale | −1,700 | $79.77 | $135.61K | 529,221 |
| Stephen M. Forthuber Pres & COO-Eastern Operations | Dec 5, 2025 | Sale | −11,598 | $79.06 | $916.94K | 530,921 |
| Stephen M. Forthuber Pres & COO-Eastern Operations | Dec 5, 2025 | Sale | −31,790 | $77.99 | $2.48M | 542,519 |
| Mital Patel EVP of Fin Planning, CAO | Dec 3, 2025 | Gift | −630 | – | – | 179,508 |
| Stephen M. Forthuber Pres & COO-Eastern Operations | Dec 3, 2025 | Option exercise | +39,127 | $6.07 | $237.50K | 574,309 |
| Lawrence L. Levitt Director | Nov 25, 2025 | Gift | −2,700 | – | – | 164,956 |
| Howard G. Berger President, CEO, Director | Nov 19, 2025 | Option exercise | +25,992 | $18.64 | $484.49K | 348,412 |
| Howard G. Berger President, CEO, Director | Nov 19, 2025 | Option exercise | +103,969 | $18.64 | $1.94M | 322,420 |
| Mital Patel EVP of Fin Planning, CAO | Nov 19, 2025 | Sale | −15,080 | $80.05 | $1.21M | 180,138 |
| Mital Patel EVP of Fin Planning, CAO | Nov 18, 2025 | Sale | −9,920 | $80.00 | $793.60K | 195,218 |
| Mital Patel EVP of Fin Planning, CAO | Nov 17, 2025 | Sale | −25,000 | $76.06 | $1.90M | 205,138 |
| Michael N. Murdock EVP, Mergers and Acquisitions | Nov 13, 2025 | Gift | −3,000 | – | – | 40,084 |
| Mark Stolper EVP, Chief Financial Officer | Sep 16, 2025 | Sale | −35,000 | $73.89 | $2.59M | 68,012 |
| David Jeffrey Katz EVP and Chief Legal Officer | Sep 16, 2025 | Sale | −14,000 | $74.44 | $1.04M | 68,181 |
| Cornelis Wesdorp Pres & CEO, Digital Health | Sep 11, 2025 | Sale | −500 | $72.13 | $36.07K | 53,495 |
| David Jeffrey Katz EVP and Chief Legal Officer | Sep 11, 2025 | Gift | −4,593 | – | – | 82,181 |
| Norman R. Hames Pres and COO-West Operations | Sep 10, 2025 | Sale | −10,000 | $72.74 | $727.40K | 239,183 |
| Cornelis Wesdorp Pres & CEO, Digital Health | Sep 9, 2025 | Sale | −500 | $71.99 | $36.00K | 53,995 |
| Norman R. Hames Pres and COO-West Operations | Aug 27, 2025 | Sale | −5,000 | $71.10 | $355.50K | 19,889 |
| Cornelis Wesdorp Pres & CEO, Digital Health | Aug 19, 2025 | Sale | −1,500 | $66.98 | $100.47K | 54,495 |
| Ranjan Jayanathan Chief Information Officer | Aug 19, 2025 | Sale | −65,598 | $67.50 | $4.43M | 138,198 |
Awards, option exercises, tax withholding and gifts are shown alongside open-market buys and sales. Each name links to the filing on SEC EDGAR.
Short interest
Shares sold short and not yet bought back, as of Oct 30, 2026 (FINRA, reported twice a month)
Short % of float
11.82%
9M shares short
Days to cover
18.0
At 0M shares a day
Change since last report
-2.1%
From 9M shares
Short volume, 20 days
55.6%
Of volume reported to FINRA
Shares sold short, last 12 months
Short sale volume counts trades marked short on any given day, including market-maker hedging, so it runs far higher than the share of RadNet's stock actually held short. Settlement fails (shares not delivered on time) peaked at 10,166 shares on Sep 9, 2026 over the last 90 days.
Planned insider sales
Notices of proposed sale filed on Form 144 before shares are sold
| Seller | Filed | Shares | Market value | Planned sale | Acquired through |
|---|---|---|---|---|---|
| David L. Swartz Director | Jun 18, 2026 | 2,699 | $145.45K | Jun 18, 2026 | Restricted Stock |
| Cornelis Wesdorp Officer | Jun 16, 2026 | 4,750 | $269.37K | Jun 16, 2026 | Compensation |
| Stephen M. Forthuber Officer | Jun 15, 2026 | 44,067 | $2.56M | Jun 15, 2026 | Restricted Stock Vesting Under a Registered Plan |
| Alma Gregory Sorensen &kristiina Harrison Sorensen Director, Board of Director | Mar 19, 2026 | 15,000 | $933.01K | Mar 19, 2026 | Restricted stock vesting under a registered plan |
| Alma Gregory Sorensen Director, Board of Director | Mar 18, 2026 | 5,919 | $379.41K | Mar 16, 2026 | Restricted stock vesting under a registered plan |
| Alma Gregory Sorensen &kristiina Harrison Sorensen Director, Board of Director | Mar 18, 2026 | 15,000 | $932.26K | Mar 18, 2026 | Restricted stock vesting under a registered plan |
| Stephen M. Forthuber Officer | Dec 5, 2025 | 45,088 | $3.53M | Dec 5, 2025 | Restricted stock vesting under a registered plan |
| Mital Patel Officer | Nov 19, 2025 | 25,000 | $2.70M | Nov 19, 2025 | RSU |
| Mital Patel Officer | Nov 19, 2025 | 9,920 | $793.63K | Nov 18, 2025 | RSU |
| Mital Patel Officer | Nov 19, 2025 | 25,000 | $1.90M | Nov 17, 2025 | RSU |
| David Jeffrey Katz Officer | Sep 16, 2025 | 14,000 | $1.05M | Sep 16, 2025 | Stock Award |
| Mark Stolper Officer | Sep 15, 2025 | 35,000 | $2.59M | Sep 15, 2025 | Employee Compensation |
| Cornelis Wesdorp Officer | Sep 11, 2025 | 500 | $36.87K | Sep 11, 2025 | Compensation |
| Norman R. Hames Officer | Sep 10, 2025 | 10,000 | $726.89K | Sep 10, 2025 | RSU |
| Cornelis Wesdorp Officer | Sep 9, 2025 | 2,000 | $145.46K | Aug 19, 2025 | Compensation |
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