Mark Stenhouse

Companies

• Phathom Pharmaceuticals, Inc.Board member Mar 19, 2020 to now¹
• Prometheus Biosciences, Inc.Chief operating officer Mar 11, 2021 to Jun 16, 2023²
• Exact SciencesPresident Apr 3, 2018 to Apr 6, 2020³

Holdings

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

Shares held

• PPPhathom Pharmaceuticals, Inc. PHAT54,122 shares⁴$380.2K at $7.03May 19, 2026
• PBPrometheus Biosciences, Inc.0 shares⁵Jun 16, 2023

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

Recent filings

• May 19, 2026Granted 24,122 shares of Phathom Pharmaceuticals, Inc.⁴
• Jun 3, 2025Granted 10,500 shares of Phathom Pharmaceuticals, Inc.⁶
• May 23, 2024Granted 10,500 shares of Phathom Pharmaceuticals, Inc.⁷
• Jun 16, 2023Returned to company 14,000 shares of Prometheus Biosciences, Inc.⁵
• Jun 16, 2023Returned to company 12,754 shares of Prometheus Biosciences, Inc.⁵
• Jun 1, 2023Other 14,000 shares of Prometheus Biosciences, Inc.⁸
• Jun 1, 2023Other 14,000 shares of Prometheus Biosciences, Inc.⁸
• May 25, 2023Granted 9,000 shares of Phathom Pharmaceuticals, Inc.⁹
• Dec 9, 2022Granted 9,811 shares of Prometheus Biosciences, Inc.¹⁰