Shawn Iadonato

Companies

• Proteostasis Therapeutics (United States)Board member Dec 20, 2022 to now¹
• Proteostasis Therapeutics (United States)Chief executive officer Dec 20, 2022 to Nov 30, 2023¹

Holdings

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

Shares held

• PTProteostasis Therapeutics (United States)0 shares²Jun 30, 2025

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

Recent filings

• Jun 30, 2025Returned to company 8,553 shares of Proteostasis Therapeutics (United States)²
• Jun 30, 2025Returned to company 860,377 shares of Proteostasis Therapeutics (United States)²
• Jun 23, 2025Shares withheld for tax 52,353 shares at $0.26 of Proteostasis Therapeutics (United States)³
• Jun 23, 2025Exercised options 225,000 shares at $0.36 of Proteostasis Therapeutics (United States)³
• Jun 23, 2025Exercised options 12,500 shares at $0.61 of Proteostasis Therapeutics (United States)³
• Nov 29, 2023Bought 4,100 shares at $3.51 of Proteostasis Therapeutics (United States)⁴
• Nov 28, 2023Bought 900 shares at $3.33 of Proteostasis Therapeutics (United States)⁴
• Sep 20, 2023Bought 10,000 shares at $2.50 of Proteostasis Therapeutics (United States)⁵
• Jun 14, 2023Shares withheld for tax 7,439 shares at $2.82 of Proteostasis Therapeutics (United States)⁶
• Jun 14, 2023Exercised options 1,382 shares at $0.14 of Proteostasis Therapeutics (United States)⁶
• Mar 20, 2023Sold 1,119 shares at $3.29 of Proteostasis Therapeutics (United States)⁷
• Mar 17, 2023Sold 44 shares at $5.23 of Proteostasis Therapeutics (United States)⁷
• Mar 17, 2023Sold 1,536 shares at $4.93 of Proteostasis Therapeutics (United States)⁷
• Dec 16, 2022Granted 8,553 shares of Proteostasis Therapeutics (United States)⁸
• Dec 16, 2022Granted 8,658 shares at $11.55 of Proteostasis Therapeutics (United States)⁸
• Dec 16, 2022Granted 8,600 shares of Proteostasis Therapeutics (United States)⁸
• Dec 16, 2022Granted 30,127 shares of Proteostasis Therapeutics (United States)⁸
• Dec 16, 2022Granted 621,601 shares of Proteostasis Therapeutics (United States)⁸