Radnet, Inc.
A U.S. outpatient diagnostic imaging company, RadNet operates roughly four hundred multi-modality centers across nine states, where patients get MRIs, CT scans, PET scans, and mammograms. Founded in 1981 by six Los Angeles doctors (including current CEO Howard Berger), it began by billing for radiology groups before opening its first imaging center across from Cedars-Sinai. Its name blends "radiology" and "network," and its DeepHealth arm builds AI tools for reading scans, born from a 2020 acquisition of a Cambridge mammography-AI startup.
Sold 1.10M
Granted 19.4K
Granted 111.2K · Sold 145.0K
Granted 1.68M · Sold 137.8K
Granted 2.71M · Sold 2.10M
Granted 1.14M · Sold 414.6K
Granted 498.4K
Granted 991.7K · Sold 416.5K
Granted 383.3K · Sold 35.6K
Granted 360.5K · Bought 5.2K · Sold 96.8K
Granted 456.6K · Bought 14.5K · Sold 99.3K
Granted 287.9K · Sold 90.0K
Granted 431.6K · Bought 12.5K · Sold 60.0K
Granted 175.0K · Sold 12.0K
Granted 54.0K · Sold 104.2K
Granted 966.5K · Sold 590.3K
Granted 156.8K · Sold 59.7K
Granted 81.3K · Sold 12.3K
Granted 557.1K · Sold 432.9K
Granted 30.0K
Bought 10.0K
Granted 20.7K · Sold 18.3K
Granted 33.2K · Sold 41.8K
Granted 22.6K · Sold 14.3K
Granted 200.0K
| Insider | Stake change | Holds now | Granted / vested | Bought | Sold |
|---|---|---|---|---|---|
| HFB Heirs Family Trust II +1 co-filer10% owner · 1 transaction | — | 6.48Mas of Oct 2017 | — | — | 1.10M |
| Sorenson Alma GregoryEVP, Chief Science Officer, Director · 1 transaction | — | 2.52Mas of Jan 2024 | 19.4K | — | — |
| Sorensen Alma GregoryChief Strategy Officer, Director · 24 transactions | — | 1.20M | 111.2K | — | 145.0K |
| Linden Jeffrey LExecutive Vice President · 33 transactions | — | 902.0Kas of Sep 2018 | 1.68M | — | 137.8K |
| Hames Norman RPres and COO-West Operations · 231 transactions | — | 543.3K | 2.71M | — | 2.10M |
| Forthuber Stephen MPres & CEO-Eastern Operations · 46 transactions | — | 527.1K | 1.14M | — | 414.6K |
| Berger Howard GPresident, CEO, Director · 21 transactions | — | 518.3K | 498.4K | — | — |
| Crues John VMedical Director, Director · 47 transactions | — | 435.3Kas of Jun 2021 | 991.7K | — | 416.5K |
| Abbasi Sami SVice President · 1 transaction | — | 300.0Kas of Nov 2006 | — | — | — |
| Cadwell Marvin SDirector · 17 transactions | — | 285.5Kas of Jun 2019 | 383.3K | — | 35.6K |
| Sherman Michael L MDDirector · 23 transactions | — | 259.1Kas of Aug 2019 | 360.5K | 5.2K | 96.8K |
| Swartz David LDirector · 48 transactions | — | 214.0K | 456.6K | 14.5K | 99.3K |
| Patel MitalEVP of Fin Planning, CAO · 28 transactions | — | 200.2K | 287.9K | — | 90.0K |
| Levitt Lawrence LDirector · 47 transactions | — | 167.9K | 431.6K | 12.5K | 60.0K |
| Skulte Todd WEVP, Hospital Based Operations · 10 transactions | — | 160.2Kas of Jun 2015 | 175.0K | — | 12.0K |
| Jayanathan RanjanChief Information Officer · 5 transactions | — | 138.2Kas of Aug 2025 | 54.0K | — | 104.2K |
| Stolper MarkEVP, Chief Financial Officer · 49 transactions | — | 121.9K | 966.5K | — | 590.3K |
| Katz David JeffreyEVP and Chief Legal Officer · 19 transactions | — | 90.9K | 156.8K | — | 59.7K |
| Wesdorp CornelisPres & CEO, Digital Health · 9 transactions | — | 69.1K | 81.3K | — | 12.3K |
| Murdock Michael NEVP, Mergers and Acquisitions · 76 transactions | — | 46.7K | 557.1K | — | 432.9K |
| Jacobs Laura PastreDirector · 7 transactions | — | 30.0K | 30.0K | — | — |
| Karen B. Kaplan Survivor's TrustIndirect owner · 1 transaction | — | 21.0Kas of Mar 2020 | — | 10.0K | — |
| Gordon Christine NayomaDirector · 10 transactions | — | 10.9Kas of Jun 2024 | 20.7K | — | 18.3K |
| Villigerwilson Ruth LouisaDirector · 9 transactions | — | 9.9Kas of Mar 2023 | 33.2K | — | 41.8K |
| Spurlock Gregory E.Director · 8 transactions | — | 8.2K | 22.6K | — | 14.3K |
| Bomar DerekVice President · 5 transactions | — | 0as of Jul 2015 | 200.0K | — | — |
| HFB Enterprises, LLC10% owner · 2 transactions | — | 0as of Jun 2015 | — | — | — |
Select a row to see that insider’s individual transactions. Sum of the holdings confirmed in the 12 months before this insider's last filing. A Form 4 reports a holding per line — held directly, or through a named trust, partnership or foundation, and in each share class separately — never a person’s total. Lines not restated in that time are left out and shown apart: an active filer restates what they still hold, so a line they did not restate is more often an entity since renamed, whose shares a successor line reports too. An amber marker means some were left out.
Net open-market activity over all recorded history: -5.94M shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.