STOLPER MARK — SEC Form 4 filings
SEC reporting owner CIK 1281961. 11 Form 4 filings on record with FilingPulse; latest filed 2026-07-29.
Transaction summary — filings shown
Covers all 11 filings on record, filed 2024-01-10 to 2026-07-29. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): none reported.
- Open-market sales (code S, non-derivative): 2 legs across 2 filings — 60,000 shares, $4,117,900 total (shares × price as filed).
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 11.
- Largest priced transaction: sale of 35,000 shares @ $73.89 ($2,586,150) in RadNet, Inc., filed 2025-09-18.
By issuer — same filings
Open-market purchase/sale legs on non-derivative securities, grouped by issuer. Role is as filed on the newest filing for that issuer. Dollar totals cover priced legs only (shares × price as filed). Ordered by priced transaction value, largest first.
| Issuer | Role (as filed) | Filings | Purchases (P) | Sales (S) | Other legs |
|---|---|---|---|---|---|
| RadNet, Inc. (RDNT) | EVP, Chief Financial Officer | 8 | — | 2 legs · 60,000 sh · $4,117,900 | 8 |
| Oncology Institute, Inc. (TOI) | Director | 2 | — | — | 2 |
| Coherus BioSciences, Inc. (CHRS) | Director | 1 | — | — | 1 |
Form 4 filings — STOLPER MARK
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2026-07-29 | 4 | Oncology Institute, Inc. (TOI) | Grant/award (A): 31,124 @ $0 | EDGAR |
| 2026-07-09 | 4 | Oncology Institute, Inc. (TOI) | Grant/award (A): 25,833 @ $0 | EDGAR |
| 2026-03-05 | 4 | RadNet, Inc. (RDNT) | Grant/award (A): 18,228 @ $0 | EDGAR |
| 2025-12-12 | 4 | RadNet, Inc. (RDNT) | Option exercise (M): 35,703 @ $6.07 · Option exercise (M): 35,703 (derivative) @ $0 | EDGAR |
| 2025-09-18 | 4 | RadNet, Inc. (RDNT) | Sale (S): 35,000 @ $73.89 | EDGAR |
| 2025-01-10 | 4 | RadNet, Inc. (RDNT) | Grant/award (A): 22,889 @ $0 | EDGAR |
| 2024-12-18 | 4 | RadNet, Inc. (RDNT) | Gift (G): 275 @ $0 | EDGAR |
| 2024-06-12 | 4 | RadNet, Inc. (RDNT) | Sale (S): 25,000 @ $61.27 | EDGAR |
| 2024-06-05 | 4 | Coherus BioSciences, Inc. (CHRS) | Grant/award (A): 112,000 (derivative) @ $0 | EDGAR |
| 2024-03-04 | 4 | RadNet, Inc. (RDNT) | Grant/award (A): 14,072 @ $0 · Grant/award (A): 27,276 (derivative) @ $0 | EDGAR |
| 2024-01-10 | 4 | RadNet, Inc. (RDNT) | Grant/award (A): 14,558 (derivative) @ $0 | EDGAR |
FilingPulse's Form 4 archive currently extends back to 2024-01-10 and is expanding backward through EDGAR history — earlier filings by this insider may not be indexed yet. Names and roles are shown as filed.
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