Comparable stake leader
BlackRock, Inc.
SEC ownership of RadNet, Inc.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0000790526.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
18 Jun 2026
- Public ticker
- RDNT on Nasdaq
- Parsed ownership sources
-
13D/G, 13F, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
BlackRock, Inc.
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
BlackRock, Inc.
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
18 Jun 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0000790526
- Issuer location
- Los Angeles, CA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
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.
Comparable stake leader
BlackRock, Inc.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
18 Jun 2026
13D/G
13F
3/4/5
Lead comparable stake: 12%
13D/G row: BlackRock, Inc.
Showing 1-8 of 50 holder rows.
Quick read
BlackRock, Inc. leads the comparable SEC ownership view at 12%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens BlackRock, Inc.'s linked filing trail.
Comparable ownership
Top 5
BlackRock, Inc.
12%
PRICE T ROWE ASSOCIATES INC /MD/
5.4%
RTW INVESTMENTS, LP
5.1%
VANGUARD PORTFOLIO MANAGEMENT LLC
5.1%
Alma Gregory Sorensen
1.6%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| 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 & CEO-Eastern Operations
|
0.66%
|
$29,726,933
507,199 shares
|
-$6,094,760 | 15 Jun 2026 |
| David L. Swartz |
3/4/5
Director
|
0.28%
|
$11,608,221
214,032 shares
|
-$145,449 | 18 Jun 2026 |
| Lawrence L. Levitt |
3/4/5
Director
|
0.22%
|
$9,384,042
167,902 shares
|
— | 02 Jun 2026 |
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: -$22,756,655.
Buys
$0
Insiders: 0
Sells
$22,756,655
Insiders: 9
Net
-$22,756,655
Shares: -325,702
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 325,702
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 51,516 | $0 | $2,984,383 | -$2,984,383 |
| 3-6 | 0 | 30,000 | $0 | $1,865,294 | -$1,865,294 |
| 6-9 | 0 | 95,088 | $0 | $7,434,103 | -$7,434,103 |
| 9-12 | 0 | 149,098 | $0 | $10,472,875 | -$10,472,875 |
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
Largest Forms 3/4/5 holder
Alma Gregory Sorensen
Net 12M change
-$22,756,655
Latest report
18 Jun 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 & CEO-Eastern Operations | $29,726,933 | -$6,094,760 | -17% | Filing P/S | 15 Jun 2026 |
| Howard G. Berger | President, CEO, Director | $28,968,624 | Mixed | 16 Jun 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 |
| David L. Swartz | Director | $11,608,221 | -$145,449 | -1.2% | Mixed | 18 Jun 2026 |
| Lawrence L. Levitt | Director | $9,384,042 | Mixed | 02 Jun 2026 | ||
| 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 | $4,013,948 | -$448,553 | -10% | Filing P/S | 16 Jun 2026 |
| Michael N. Murdock | EVP, Mergers and Acquisitions | $3,273,926 | Mixed | 03 Mar 2026 | ||
| Laura Pastre Jacobs | Director | $1,674,073 | Mixed | 02 Jun 2026 | ||
| Christine Nayoma Gordon | Director | $663,945 | Filing P/S | 07 Jun 2024 | ||
| Gregory E. Spurlock | Director | $460,310 | Mixed | 02 Jun 2026 | ||
| Ruth Louisa Villigerwilson | Director | $346,138 | Mixed | 03 Mar 2023 |
Recent insider transactions for RadNet, Inc.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| David L. Swartz | RDNT | Common Stock | Sale | -1.5% | $145,449 | $53.89 | -2,699 | 177,013 | 18 Jun 2026 | Direct |
| Cornelis Wesdorp | RDNT | Common Stock | Sale | -6.43% | $276,022 | $58.11 | -4,750 | 69,075 | 16 Jun 2026 | Direct |
| Howard G. Berger | RDNT | Common Stock | Gift | -0.45% | -90 | 19,910 | 16 Jun 2026 | By Spouse | ||
| Stephen M. Forthuber | RDNT | Common Stock | Sale | -7.99% | $2,562,911 | $58.16 | -44,067 | 507,199 | 15 Jun 2026 | Direct |
| David L. Swartz | RDNT | Common Stock | Award | 1.67% | 2,946 | 179,712 | 02 Jun 2026 | Direct | ||
| Gregory E. Spurlock | RDNT | Common Stock | Award | 55.7% | 2,946 | 8,236 | 02 Jun 2026 | Direct | ||
| Laura Pastre Jacobs | RDNT | Common Stock | Award | 10.9% | 2,946 | 29,953 | 02 Jun 2026 | Direct | ||
| Lawrence L. Levitt | RDNT | Common Stock | Award | 1.79% | 2,946 | 167,902 | 02 Jun 2026 | Direct | ||
| 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 |
* marks a reported price that did not pass the local price check.