Updated Jul 16, 2026
STOLPER MARK has filed 1 SEC Form 4 filing across 1 company in the last 90 days — selling. Lifetime open-market sales: $2.59M.
Mark Stolper is the Executive Vice President and Chief Financial Officer of RadNet, Inc., a national provider of diagnostic imaging services. He has been involved in the financial management of the company, contributing to its operations in the imaging and digital health segments.
| Role | Director |
|---|---|
| Notability | 30/100 |
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-07-09 | TOI | Oncology Institute, Inc. | A — Grant or award | 25.8K | $0.00 | |
| 2026-03-05 | RDNT | RadNet, Inc. | A — Grant or award | 18.2K | $0.00 | |
| 2025-12-12 | RDNT | RadNet, Inc. | M — Option exercise | 35.7K | $6.07 | $217K |
| 2025-09-16 | RDNT | RadNet, Inc. | S — Open-market sale | 35.0K | $73.89 | $2.59M |
| 2024-12-18 | RDNT | RadNet, Inc. | G — Bona-fide gift | 275 | $0.00 |
Mark Stolper is the Executive Vice President and Chief Financial Officer of RadNet, Inc., a national provider of diagnostic imaging services. He has been involved in the financial management of the company, contributing to its operations in the imaging and digital health segments.…
1 primary Form 4 filings in the last 90 days, covering 1 company.
Recorded transactions: 0 open-market purchases () and 1 open-market sales ($2.59M) across all tracked filings.
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
Open the live STOLPER MARK profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.