Mark James Litton

Companies

• LeonaBio, Inc.President Sep 5, 2024 to now¹
• LeonaBio, Inc.Board member Jan 31, 2022 to now²
• LeonaBio, Inc.Chief executive officer Jan 31, 2022 to now²
• LeonaBio, Inc.Chief operating officer Sep 17, 2020 to Aug 19, 2021³
• Alpine Immune SciencesOfficer Aug 8, 2018 to Feb 8, 2019⁴

Holdings

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

Shares held

• LLeonaBio, Inc. LONA58,582 shares⁵$309.9K at $5.29Mar 5, 2026

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

Recent filings

• Mar 4, 2026Sold 5,156 shares at $5.37 of LeonaBio, Inc.⁵
• Mar 3, 2026Exercised options 22,254 shares of LeonaBio, Inc.⁵
• Jan 2, 2026Sold 2,586 shares at $6.88 of LeonaBio, Inc.⁶
• Dec 31, 2025Exercised options 10,834 shares of LeonaBio, Inc.⁶
• Jul 1, 2025Sold 25,123 shares at $0.29 of LeonaBio, Inc.⁷
• Jun 30, 2025Exercised options 108,334 shares of LeonaBio, Inc.⁷
• Jan 2, 2025Sold 25,107 shares at $0.56 of LeonaBio, Inc.⁸
• Dec 31, 2024Exercised options 108,333 shares of LeonaBio, Inc.⁸
• Sep 5, 2024Sold 5,032 shares at $0.57 of LeonaBio, Inc.⁹
• Sep 3, 2024Granted 20,000 shares of LeonaBio, Inc.⁹
• Jan 5, 2024Sold 4,820 shares at $2.91 of LeonaBio, Inc.¹⁰
• Jan 5, 2024Sold 4,820 shares at $2.91 of LeonaBio, Inc.¹¹
• Jan 4, 2024Granted 20,000 shares of LeonaBio, Inc.¹⁰
• Jan 4, 2024Granted 20,000 shares of LeonaBio, Inc.¹¹
• Nov 18, 2022Granted 662 shares at $2.74 of LeonaBio, Inc.¹²
• Jun 23, 2022Sold 7,960 shares at $2.69 of LeonaBio, Inc.¹³
• Jun 22, 2022Granted 20,000 shares of LeonaBio, Inc.¹³
• May 18, 2022Granted 757 shares at $7.06 of LeonaBio, Inc.¹³
• Nov 18, 2021Granted 885 shares at $12.51 of LeonaBio, Inc.¹⁴