Arthur J. Klausner

Companies

• Monopar TherapeuticsBoard member Jan 8, 2018 to now¹

Holdings

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

Shares held

• Monopar Therapeutics MNPR3,064,156 shares²$216.8M at $70.76Dec 18, 2025

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

Recent filings

• Dec 18, 2025Sold 461 shares at $68.09 of Monopar Therapeutics²
• Dec 18, 2025Sold 4,660 shares at $67.06 of Monopar Therapeutics²
• Dec 16, 2025Other 7,710 shares of Monopar Therapeutics³
• Dec 31, 2023Exercised options 2,533 shares of Monopar Therapeutics⁴
• Sep 30, 2023Exercised options 2,533 shares of Monopar Therapeutics⁵
• Jun 30, 2023Exercised options 2,534 shares of Monopar Therapeutics⁶
• Mar 31, 2023Exercised options 2,533 shares of Monopar Therapeutics⁷
• Dec 31, 2022Exercised options 2,859 shares of Monopar Therapeutics⁸
• Sep 30, 2022Exercised options 2,859 shares of Monopar Therapeutics⁹
• Jun 30, 2022Exercised options 2,859 shares of Monopar Therapeutics¹⁰
• Mar 31, 2022Exercised options 2,859 shares of Monopar Therapeutics¹¹
• Dec 31, 2021Exercised options 751 shares of Monopar Therapeutics¹²
• Sep 30, 2021Exercised options 751 shares of Monopar Therapeutics¹³