Willard H. Dere

Companies

• Metagenomi Therapeutics, Inc.Board member Feb 8, 2024 to now¹
• Mersana Therapeutics (United States)Board member Mar 21, 2018 to now²
• Seres Therapeutics, Inc.Board member Jul 10, 2017 to now³
• BioMarin PharmaceuticalBoard member Jul 19, 2016 to now⁴
• Radius Health, Inc.Board member Nov 7, 2014 to Aug 15, 2022⁵

Holdings

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

Shares held

• BioMarin Pharmaceutical BMRN46,440 shares⁶$2.5M at $54.68Jun 2, 2026
• STSeres Therapeutics, Inc. MCRB31,746 shares⁷$80.3K at $2.53Jul 5, 2022
• MTMetagenomi Therapeutics, Inc. MGX51,275 shares⁸$43.3K at $0.84Feb 8, 2024
• RHRadius Health, Inc.0 shares⁹Aug 15, 2022
• MTMersana Therapeutics (United States)0 shares¹⁰Jan 6, 2026

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

Recent filings

• Jun 2, 2026Granted 7,490 shares of BioMarin Pharmaceutical⁶
• Jan 6, 2026U 1,567 shares of Mersana Therapeutics (United States)¹⁰
• May 20, 2025Granted 6,650 shares of BioMarin Pharmaceutical¹¹
• May 21, 2024Granted 4,720 shares of BioMarin Pharmaceutical¹²
• Jan 2, 2024Granted 6,112 shares of Mersana Therapeutics (United States)¹³
• Oct 2, 2023Granted 11,011 shares of Mersana Therapeutics (United States)¹⁴
• Jul 3, 2023Granted 4,217 shares of Mersana Therapeutics (United States)¹⁵
• Jun 8, 2023Granted 14,467 shares of Mersana Therapeutics (United States)¹⁶
• May 23, 2023Granted 4,190 shares of BioMarin Pharmaceutical¹⁷
• Apr 3, 2023Granted 3,375 shares of Mersana Therapeutics (United States)¹⁸
• Aug 15, 2022Returned to company 1,895 shares at $10.00 of Radius Health, Inc.⁹
• Aug 15, 2022U 21,300 shares at $10.00 of Radius Health, Inc.⁹
• Jul 5, 2022Granted 31,746 shares at $3.15 of Seres Therapeutics, Inc.⁷
• May 24, 2022Granted 4,980 shares of BioMarin Pharmaceutical¹⁹
• Jan 14, 2022Granted 5,500 shares of Radius Health, Inc.²⁰