Holder evidence
50
SEC ownership of RadNet, Inc.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0000790526.
Lead holder
BlackRock, Inc.
13D/G signal
BlackRock, Inc.
Latest evidence
31 Mar 2026
- CIK
- 0000790526
- Symbol
- RDNT on Nasdaq
- Location
- Los Angeles, CA
- SEC evidence mix
- 13D/G, 13F, and 3/4/5
- Lead holder
- BlackRock, Inc.
- Latest large-stake holder
- BlackRock, Inc.
- Latest evidence date
- 31 Mar 2026
Issuer identity
3 facts
Ownership snapshot
4 facts
Ownership snapshot
Top shareholders of RadNet, Inc. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Lead holder
BlackRock, Inc.
13D/G signal
BlackRock, Inc.
Evidence rows
50
Latest as of
31 Mar 2026
13D/G
13F
3/4/5
Lead comparable stake: 12%
13D/G row: BlackRock, Inc.
Showing 1-8 of 50 holder rows.
Rank 1 holder
BlackRock, Inc.
13D/G
13F
- Ownership
- 12%
- Position
- $704.99M
Rank 2 holder
PRICE T ROWE ASSOCIATES INC /MD/
13D/G
13F
- Ownership
- 5.4%
- Position
- $232.3M
Rank 3 holder
RTW INVESTMENTS, LP
13D/G
13F
- Ownership
- 5.1%
- Position
- $300.7M
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BlackRock, Inc. |
13D/G
13F
Company
|
12%
|
$704,993,027
9,250,663 shares
|
$0 | 30 Sep 2025 |
| PRICE T ROWE ASSOCIATES INC /MD/ |
13D/G
13F
T. Rowe Price Associates, Inc. · Company
|
5.4%
|
$232,296,937
4,154,837 shares
|
$0 | 31 Mar 2026 |
| RTW INVESTMENTS, LP |
13D/G
13F
Company
|
5.1%
|
$300,704,475
3,938,500 shares
|
$0 | 31 Dec 2025 |
| VANGUARD PORTFOLIO MANAGEMENT LLC |
13D/G
13F
Vanguard Portfolio Management · Company
|
5.1%
|
$220,886,222
3,952,160 shares
|
$0 | 31 Mar 2026 |
| Alma Gregory Sorensen |
3/4/5
Chief Strategy Officer, Director
|
1.6%
|
$86,646,629
1,201,923 shares
|
-$1,865,294 | 19 Mar 2026 |
| Stephen M. Forthuber |
3/4/5
Pres & COO-Eastern Operations
|
0.72%
|
$38,649,259
551,266 shares
|
-$3,531,849 | 03 Mar 2026 |
| David L. Swartz |
3/4/5
Director
|
0.28%
|
$11,916,375
213,785 shares
|
— | 10 Jun 2025 |
| Lawrence L. Levitt |
3/4/5
Director
|
0.21%
|
$13,671,553
164,956 shares
|
— | 25 Nov 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$20,418,485.
Buys
$0
Insiders: 0
Sells
$20,418,485
Insiders: 9
Net
-$20,418,485
Shares: -285,318
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 285,318
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 30,000 | $0 | $1,865,294 | -$1,865,294 |
| 3-6 | 0 | 45,088 | $0 | $3,531,849 | -$3,531,849 |
| 6-9 | 0 | 110,000 | $0 | $8,330,024 | -$8,330,024 |
| 9-12 | 0 | 100,230 | $0 | $6,691,318 | -$6,691,318 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-17 of 17 reporting-owner rows connected to RadNet, Inc.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
17
Lead holder
Alma Gregory Sorensen
Net 12M change
-$20,418,485
Latest report
05 May 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Alma Gregory Sorensen | Chief Strategy Officer, Director | $86,646,629 | -$1,865,294 | -2.1% | Mixed | 19 Mar 2026 |
| Stephen M. Forthuber | Pres & COO-Eastern Operations | $38,649,259 | -$3,531,849 | -8.4% | Mixed | 03 Mar 2026 |
| Howard G. Berger | President, CEO, Director | $28,973,655 | Median | 05 May 2026 | ||
| Norman R. Hames | Pres and COO-West Operations | $19,926,453 | -$1,082,900 | -5.2% | Mixed | 03 Mar 2026 |
| John Crues V | Medical Director, Director | $15,242,875 | Mixed | 10 Jun 2021 | ||
| Mital Patel | EVP of Fin Planning, CAO | $14,034,269 | -$3,902,254 | -22% | Mixed | 03 Mar 2026 |
| Lawrence L. Levitt | Director | $13,671,553 | Mixed | 25 Nov 2025 | ||
| David L. Swartz | Director | $11,916,375 | Mixed | 10 Jun 2025 | ||
| Ranjan Jayanathan | Chief Information Officer | $9,328,365 | -$4,427,865 | -32% | Filing P/S | 19 Aug 2025 |
| Mark Stolper | EVP, Chief Financial Officer | $8,549,423 | -$2,586,150 | -23% | Mixed | 03 Mar 2026 |
| David Jeffrey Katz | EVP and Chief Legal Officer | $6,370,615 | -$2,203,430 | -26% | Mixed | 03 Mar 2026 |
| Cornelis Wesdorp | Pres & CEO, Digital Health | $5,175,870 | -$172,530 | -3.2% | Mixed | 03 Mar 2026 |
| Michael N. Murdock | EVP, Mergers and Acquisitions | $3,273,926 | -$646,213 | -16% | Mixed | 03 Mar 2026 |
| Laura Pastre Jacobs | Director | $1,505,370 | Mixed | 10 Jun 2025 | ||
| Christine Nayoma Gordon | Director | $663,945 | Filing P/S | 07 Jun 2024 | ||
| Ruth Louisa Villigerwilson | Director | $346,138 | Mixed | 03 Mar 2023 | ||
| Gregory E. Spurlock | Director | $294,864 | Mixed | 10 Jun 2025 |
Recent insider transactions for RadNet, Inc.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | Reported value | Reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Howard G. Berger | RDNT | Common Stock | Options Exercise | 5.5% | 25,992 | 498,405 | 05 May 2026 | Direct | ||
| Howard G. Berger | RDNT | Stock Option (right to buy) | Options Exercise | -50% | -25,992 | 25,992 | 05 May 2026 | Direct | ||
| Alma Gregory Sorensen | RDNT | Common Stock | Gift | -0.58% | -7,000 | 1,201,923 | 19 Mar 2026 | Direct | ||
| Alma Gregory Sorensen | RDNT | Common Stock | Sale | -1.23% | $933,014 | $62.20 | -15,000 | 1,208,923 | 19 Mar 2026 | Direct |
| Alma Gregory Sorensen | RDNT | Common Stock | Sale | -1.21% | $932,280 | $62.15 | -15,000 | 1,223,923 | 18 Mar 2026 | Direct |
| Alma Gregory Sorensen | RDNT | Common Stock | Tax liability | -0.48% | -5,919 | 1,238,923 | 16 Mar 2026 | Direct | ||
| Alma Gregory Sorensen | RDNT | Common Stock | Options Exercise | 5.33% | 62,964 | 1,244,842 | 10 Mar 2026 | Direct | ||
| Alma Gregory Sorensen | RDNT | Employee Stock Option (right to buy) | Options Exercise | -100% | -62,964 | 0 | 10 Mar 2026 | Direct | ||
| Mital Patel | RDNT | Common Stock | Award | 11.5% | 20,667 | 200,175 | 03 Mar 2026 | Direct | ||
| David Jeffrey Katz | RDNT | Common Stock | Award | 27% | 19,289 | 90,866 | 03 Mar 2026 | Direct | ||
| Cornelis Wesdorp | RDNT | Common Stock | Award | 38% | 20,330 | 73,825 | 03 Mar 2026 | Direct | ||
| Mark Stolper | RDNT | Common Stock | Award | 17.6% | 18,228 | 121,943 | 03 Mar 2026 | Direct | ||
| Stephen M. Forthuber | RDNT | Common Stock | Award | 4.17% | 22,045 | 551,266 | 03 Mar 2026 | Direct | ||
| Norman R. Hames | RDNT | Common Stock | Award | 15.6% | 3,100 | 22,989 | 03 Mar 2026 | By Spouse | ||
| Norman R. Hames | RDNT | Common Stock | Award | 9.22% | 22,045 | 261,228 | 03 Mar 2026 | Direct | ||
| Howard G. Berger | RDNT | Common Stock | Award | 35.6% | 124,001 | 472,413 | 03 Mar 2026 | Direct | ||
| Michael N. Murdock | RDNT | Common Stock | Award | 16.5% | 6,613 | 46,697 | 03 Mar 2026 | Direct | ||
| Alma Gregory Sorensen | RDNT | Common Stock | Award | 1.42% | 16,533 | 1,181,878 | 03 Mar 2026 | Direct | ||
| Mark Stolper | RDNT | Common Stock | Options Exercise | 52.5% | 35,703 | 103,715 | 10 Dec 2025 | Direct | ||
| Mark Stolper | RDNT | Employee Stock Option (right to buy) | Options Exercise | -100% | -35,703 | 0 | 10 Dec 2025 | Direct | ||
| David Jeffrey Katz | RDNT | Common Stock | Options Exercise | 4.98% | 3,396 | 71,577 | 10 Dec 2025 | Direct | ||
| David Jeffrey Katz | RDNT | Employee Stock Option (right to buy) | Options Exercise | -17.9% | -3,396 | 15,556 | 10 Dec 2025 | Direct | ||
| Stephen M. Forthuber | RDNT | Common Stock | Sale | -7.85% | $3,531,849 | $78.33 | -45,088 | 529,221 | 05 Dec 2025 | Direct |
| Mital Patel | RDNT | Common Stock | Gift | -0.35% | -630 | 179,508 | 03 Dec 2025 | Direct | ||
| Stephen M. Forthuber | RDNT | Common Stock | Options Exercise | 7.31% | 39,127 | 574,309 | 03 Dec 2025 | Direct | ||
| Stephen M. Forthuber | RDNT | Employee Stock Option (right to buy) | Options Exercise | -100% | -39,127 | 0 | 03 Dec 2025 | Direct | ||
| Lawrence L. Levitt | RDNT | Common Stock | Gift | -1.61% | -2,700 | 164,956 | 25 Nov 2025 | Direct | ||
| Howard G. Berger | RDNT | Common Stock | Options Exercise | 59.5% | 129,961 | 348,412 | 19 Nov 2025 | Direct | ||
| Howard G. Berger | RDNT | Stock Option (right to buy) | Options Exercise | -100% | -129,961 | 0 | 19 Nov 2025 | Direct | ||
| Mital Patel | RDNT | Common Stock | Sale | -7.72% | $1,207,154 | $80.05 | -15,080 | 180,138 | 19 Nov 2025 | Direct |
| Mital Patel | RDNT | Common Stock | Sale | -4.84% | $793,600 | $80.00 | -9,920 | 195,218 | 18 Nov 2025 | Direct |
| Mital Patel | RDNT | Common Stock | Sale | -10.9% | $1,901,500 | $76.06 | -25,000 | 205,138 | 17 Nov 2025 | Direct |
| Michael N. Murdock | RDNT | Common Stock | Gift | -6.96% | -3,000 | 40,084 | 13 Nov 2025 | Direct | ||
| Mark Stolper | RDNT | Common Stock | Sale | -34% | $2,586,150 | $73.89 | -35,000 | 68,012 | 16 Sep 2025 | Direct |
| David Jeffrey Katz | RDNT | Common Stock | Sale | -17% | $1,042,160 | $74.44 | -14,000 | 68,181 | 16 Sep 2025 | Direct |
| Cornelis Wesdorp | RDNT | Common Stock | Sale | -0.93% | $36,065 | $72.13 | -500 | 53,495 | 11 Sep 2025 | Direct |
| David Jeffrey Katz | RDNT | Common Stock | Gift | -5.29% | -4,593 | 82,181 | 11 Sep 2025 | Direct | ||
| Norman R. Hames | RDNT | Common Stock | Sale | -4.01% | $727,400 | $72.74 | -10,000 | 239,183 | 10 Sep 2025 | Direct |
| Cornelis Wesdorp | RDNT | Common Stock | Sale | -0.92% | $35,995 | $71.99 | -500 | 53,995 | 09 Sep 2025 | Direct |
| Norman R. Hames | RDNT | Common Stock | Sale | -20.1% | $355,500 | $71.10 | -5,000 | 19,889 | 27 Aug 2025 | By Spouse |
| Cornelis Wesdorp | RDNT | Common Stock | Sale | -2.68% | $100,470 | $66.98 | -1,500 | 54,495 | 19 Aug 2025 | Direct |
| Ranjan Jayanathan | RDNT | Common Stock | Sale | -32.2% | $4,427,865 | $67.50 | -65,598 | 138,198 | 19 Aug 2025 | Direct |
| David Jeffrey Katz | RDNT | Common Stock | Sale | -16.4% | $1,161,270 | $68.31 | -17,000 | 86,774 | 13 Aug 2025 | Direct |
| Alma Gregory Sorensen | RDNT | Common Stock | Gift | -0.48% | -5,600 | 1,165,345 | 17 Jun 2025 | Direct | ||
| David L. Swartz | RDNT | Common Stock | Award | 1.55% | 2,699 | 176,766 | 10 Jun 2025 | Direct | ||
| Gregory E. Spurlock | RDNT | Common Stock | Award | 104.2% | 2,699 | 5,290 | 10 Jun 2025 | Direct | ||
| Lawrence L. Levitt | RDNT | Common Stock | Award | 1.64% | 2,699 | 167,656 | 10 Jun 2025 | Direct | ||
| Laura Pastre Jacobs | RDNT | Common Stock | Award | 11.1% | 2,699 | 27,007 | 10 Jun 2025 | Direct | ||
| Michael N. Murdock | RDNT | Common Stock | Sale | -20.5% | $646,213 | $58.05 | -11,132 | 43,084 | 05 Jun 2025 | Direct |
| Alma Gregory Sorensen | RDNT | Common Stock | Award | 0.9% | 10,436 | 1,170,945 | 01 Jun 2025 | Direct |
* indicates a reported price that failed the local validity check.