Mark Stolper

Companies

• Starling Oncology, Inc.Board member Jan 12, 2026 to now¹
• Coherus BioSciences (United States)Board member Jan 7, 2021 to Jun 5, 2024²
• SURGALIGN HOLDINGS, INC.Board member Mar 8, 2019 to Aug 17, 2022³
• ALCO StoresBoard member Sep 11, 2014 to Sep 11, 2014⁴
• ON TRACK INNOVATIONS LTDBoard member Jan 7, 2014 to Jun 12, 2014⁵
• RadNet, Inc.Chief financial officer Jul 12, 2006 to Oct 30, 2008⁶

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

• RRadNet, Inc. RDNT121,943 shares⁷$8.4M at $68.80Mar 3, 2026
• SOStarling Oncology, Inc. STLN56,957 shares⁸$389.6K at $6.84Jul 27, 2026
• SSURGALIGN HOLDINGS, INC.28,867 shares⁹Aug 15, 2022

As of each latest filing. The line shows shares held over time.

Recent filings

• Jul 27, 2026Granted 31,124 shares of Starling Oncology, Inc.⁸
• Jul 7, 2026Granted 25,833 shares of Starling Oncology, Inc.¹⁰
• Mar 3, 2026Granted 18,228 shares of RadNet, Inc.⁷
• Dec 10, 2025Exercised options 35,703 shares at $6.07 of RadNet, Inc.¹¹
• Sep 16, 2025Sold 35,000 shares at $73.89 of RadNet, Inc.¹²
• Jan 8, 2025Granted 22,889 shares of RadNet, Inc.¹³
• Dec 16, 2024Gift 275 shares of RadNet, Inc.¹⁴
• Jun 10, 2024Sold 25,000 shares at $61.27 of RadNet, Inc.¹⁵
• Mar 1, 2024Granted 14,072 shares of RadNet, Inc.¹⁶
• May 12, 2023Gift 900 shares of RadNet, Inc.¹⁷
• May 4, 2023Gift 375 shares of RadNet, Inc.¹⁸
• Aug 15, 2022Granted 22,857 shares of SURGALIGN HOLDINGS, INC.⁹