4 Founders Backed by David Grayzel (2026)

David Grayzel founders (4)

David Grayzel founders covers 4 founders on GRO Biosciences, Pheon Therapeutics and Sionna Therapeutics and 1 other companies. The most common sector is Biotech (4). Members are based in 4 cities, led by Cambridge, MA (1), London, UK (1) and Waltham, MA (1). Companies represented include Triveni Bio. Every founder below links to a profile with their company, backers, and the filings behind each round.

• Founders listed: 4
• Companies represented: 4
• Top sector: Biotech (4 founders)
• Top location: Cambridge, MA (1 founders)
• Locations represented: 4

• Cyrus Mozayeni — Pheon Therapeutics
• Dan Mandell — GRO Biosciences
• Michael Cloonan — Sionna Therapeutics
• Vishal Patel — Triveni Bio

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• David Grayzel · Biotech (4 founders)

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