STOLPER MARK (CIK 1281961) reported 5 SEC Form 4 insider transactions across 2 companies over the past 18 months (most recent 2026-07-29). Recent activity: Buy TOI (31,124 shares), Buy TOI (25,833 shares), Buy RDNT (18,228 shares), Buy RDNT (35,703 shares), Sell RDNT (35,000 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-07-29 | Oncology Institute, Inc. (TOI) | Director | Buy | 31,124 | $0 |
| 2026-07-09 | Oncology Institute, Inc. (TOI) | Director | Buy | 25,833 | $0 |
| 2026-03-05 | RadNet, Inc. (RDNT) | EVP, Chief Financial Officer | Buy | 18,228 | $0 |
| 2025-12-12 | RadNet, Inc. (RDNT) | EVP, Chief Financial Officer | Buy | 35,703 | $216,717 |
| 2025-09-18 | RadNet, Inc. (RDNT) | EVP, Chief Financial Officer | Sell | 35,000 | $2.6M |
Source: SEC Form 4 filings · as of 2026-07-29