Who
Mark Stolper
Director
Company insider
Files Form 4 as: Director, The Oncology Institute; EVP, Chief Financial Officer, RadNet; Director, Coherus Oncology; Director, Surgalign Holdings; Director, Rti Surgical; Director, On Track Innovations; Other, Star Equity Holdings; Director and Other, Metropolitan Health Networks.
In numbers
- Trades disclosed
- 122
- Buys
- 3
- Sells
- 17
- Bought
- $49K
- Sold
- $6.9M
- Companies
- 8
- Companies where not an officer
- 7
- First trade
- 11 Jul 2006
- Last trade
- 27 Jul 2026
- Last filed
- 29 Jul 2026
Companies traded
Activity over time
1 Nov 2024 – 1 Oct 2026
Buys above the line, sells below, each month.
Every trade
| Traded | Company | What | Amount | |
|---|---|---|---|---|
| 27 Jul 2026filed 29 Jul 2026 | The Oncology InstituteProviders & Facilities | SEC FORM 4 Code A | —31,124 at $0.00 | filing |
| 27 Jul 2026filed 29 Jul 2026 | The Oncology InstituteProviders & Facilities | SEC FORM 4 Code A | —31,124 at $0.00 | filing |
| 7 Jul 2026filed 9 Jul 2026 | The Oncology InstituteProviders & Facilities | SEC FORM 4 Code A | —25,833 at $0.00 | filing |
| 7 Jul 2026filed 9 Jul 2026 | The Oncology InstituteProviders & Facilities | SEC FORM 4 Code A | —25,833 at $0.00 | filing |
| 3 Mar 2026filed 5 Mar 2026 | RDNT RadNetDiagnostics & Labs | SEC FORM 4 Code A | —18,228 at $0.00 | filing |
| 3 Mar 2026filed 5 Mar 2026 | RDNT RadNetDiagnostics & Labs | SEC FORM 4 Code A | —18,228 at $0.00 | filing |
| 10 Dec 2025filed 12 Dec 2025 | RDNT RadNetoption or derivative · Diagnostics & Labs | SEC FORM 4 Code M | —35,703 at $0.00 | filing |
| 10 Dec 2025filed 12 Dec 2025 | RDNT RadNetDiagnostics & Labs | SEC FORM 4 Code M | $217K35,703 at $6.07 | filing |
| 16 Sep 2025filed 18 Sep 2025 | RDNT RadNetDiagnostics & Labs | SEC FORM 4 Sold | $2.6M35,000 at $73.89 | filing |
| 8 Jan 2025filed 10 Jan 2025 | RDNT RadNetDiagnostics & Labs | SEC FORM 4 Code A | —22,889 at $0.00 | filing |
| 16 Dec 2024filed 18 Dec 2024 | RDNT RadNetDiagnostics & Labs | SEC FORM 4 Code G | —275 at $0.00 | filing |
| 10 Jun 2024filed 12 Jun 2024 | RDNT RadNetDiagnostics & Labs | SEC FORM 4 Sold | $1.5M25,000 at $61.27 | filing |
| 3 Jun 2024filed 5 Jun 2024 | CHRS Coherus Oncologyoption or derivative · Biotechnology | SEC FORM 4 Code A | —112,000 at $0.00 | filing |
| 1 Mar 2024filed 4 Mar 2024 | RDNT RadNetoption or derivative · Diagnostics & Labs | SEC FORM 4 Code A | —27,276 at $0.00 | filing |
| 1 Mar 2024filed 4 Mar 2024 | RDNT RadNetDiagnostics & Labs | SEC FORM 4 Code A | —14,072 at $0.00 | filing |
| 9 Jan 2024filed 10 Jan 2024 | RDNT RadNetoption or derivative · Diagnostics & Labs | SEC FORM 4 Code A | —14,558 at $0.00 | filing |
| 7 Jun 2023filed 9 Jun 2023 | CHRS Coherus Oncologyoption or derivative · Biotechnology | SEC FORM 4 Code A | —38,250 at $0.00 | filing |
| 12 May 2023filed 16 May 2023 | RDNT RadNetDiagnostics & Labs | SEC FORM 4 Code G | —900 at $0.00 | filing |
| 4 May 2023filed 8 May 2023 | RDNT RadNetDiagnostics & Labs | SEC FORM 4 Code G | —375 at $0.00 | filing |
| 28 Feb 2023filed 2 Mar 2023 | RDNT RadNetoption or derivative · Diagnostics & Labs | SEC FORM 4 Code A | —2,227 at $0.00 | filing |
News
Liberty All-Star Equity Fund (NYSE:USA) Sees Significant Growth in Short InterestSTRR · themarketsdaily.com · 15 Oct 2026RadNet (NASDAQ:RDNT) Shares Cross Above 200 Day Moving Average – Should You Sell?RDNT · dailypolitical.com · 14 Oct 2026Star Equity Holdings to Present at the LD Micro Main Event on October 20STRR · manilatimes.net · 14 Oct 2026Reviewing Star Equity (NASDAQ:STRR) and CBIZ (NYSE:CBZ)STRR · dailypolitical.com · 13 Oct 2026
0 headlines in the last 90 days name Mark Stolper; 4 articles from the last 14 days about the 2 companies they traded most, at most three about any one of them.