RadNet, Inc.
RDNT- Exchange
- Nasdaq
- Industry
- Services-Medical Laboratories
- SEC CIK
- 0000790526
No open-market purchases or sales by RadNet, Inc. insiders were filed in the last 90 days; 328 institutions reported holding it in 13F filings for Q2 2026, worth $5.03B in total; Soros Fund Management is the only superinvestor holding it.
Holders of 5% or more of RDNT
Holders whose latest Schedule 13D or 13G filing reports 5% or more of RadNet, Inc., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| BlackRock, Inc. | 13G/A | 12.00%9.25M shares | – | Oct 17, 20251 filing | Oct 17, 2025 | SEC |
| RTW Investments, LP | 13G | 5.10%3.94M shares | New | Feb 17, 20261 filing | Feb 17, 2026 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
4 Schedule 13D and 13G filings on RadNet, Inc., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Aug 14, 20268:08 AM ET | RTW Investments, LPand 1 other | 13G/A | 6.20%4.85M shares | +1.10 ppfrom 5.10% | Jun 30, 2026 | SEC |
| May 15, 202610:07 AM ET | Price T Rowe Associates Inc | 13G | 5.40%4.15M shares | New | Mar 31, 2026 | SEC |
| Apr 29, 20262:52 PM ET | Vanguard Portfolio Management LLC | 13G | 5.09%3.95M shares | New | Mar 31, 2026 | SEC |
| Mar 27, 202611:35 AM ET | Vanguard Group Inc | 13G/A | 0.00%0 shares | −10.03 ppfrom 10.03%Below 5% | Mar 13, 2026 | SEC |
| Feb 17, 20268:43 AM ET | RTW Investments, LPand 1 other | 13G | 5.10%3.94M shares | New | Dec 31, 2025 | SEC |
| Oct 17, 20255:57 PM ET | BlackRock, Inc. | 13G/A | 12.00%9.25M shares | – | Sep 30, 2025 | SEC |
| Jan 8, 202511:29 AM ET | Vanguard Group Inc | 13G/A | 10.03%7.43M shares | – | Dec 31, 2024 | SEC |
| Feb 10, 2022 | Vanguard Group Inc | 13G/AOld format | – | – | – | SEC |
| Jan 27, 202211:00 AM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Jan 25, 20223:03 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Aug 3, 2021 | JB Capital Partners LP | 13D/AOld format | – | – | – | SEC |
| Feb 10, 2021 | Vanguard Group Inc | 13G/AOld format | – | – | – | SEC |
| Feb 8, 2021 | FMR LLC | 13G/AOld format | – | – | – | SEC |
| Jan 26, 20216:52 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell RadNet, Inc. shares.
No Form 144 notices for RadNet, Inc. are on file.