John Flavin
John Flavin is a founder and CEO with experience developing corporate, academic, and civic enterprises. He has raised over $345 million in private and philanthropic capital for transformative organizations.
What John can write
Portal Innovations writes $500K to $3M checks, larger than 71% of firms in the atlas.
Bars: how many firms report each check band. Highlighted: Portal Innovations.Career
- Pyxis Oncology · Co-Founder and Chairman
- ClostraBio · Executive Chairman
- Grove Biopharma · Board member
- Advanced Life Sciences
- MediChem
- MATTER
- Polsky Center for Entrepreneurship and Innovation at the University of Chicago
- Portal Innovations · Founder & CEONow
Companies founded
Investments named in public bios
Focus
Also at Portal Innovations
Partners like John
At firms with a similar stage, sector and check size.
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One email when John's firm raises a fund, adds a partner or shows new activity.
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Raising a pre-seed or seed round? We write $1M to $5M first checks and help founders with distribution. A partner reads every deck.
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Who is John Flavin?
John Flavin is a founder and CEO with experience developing corporate, academic, and civic enterprises. He has raised over $345 million in private and philanthropic capital for transformative organizations.
How much does John Flavin invest?
John Flavin invests through Portal Innovations, which writes checks of $500K to $3M at pre-seed, seed.
How do I pitch John Flavin?
Email [email protected], the firm's inbox for founders, and name John in the subject. A warm intro from a founder Portal Innovations backed works better.
What did John Flavin do before Portal Innovations?
Co-Founder and Chairman at Pyxis Oncology; Executive Chairman at ClostraBio; Board member at Grove Biopharma; Advanced Life Sciences; MediChem; MATTER; Polsky Center for Entrepreneurship and Innovation at the University of Chicago.
Last updated 2026-10-15. Is this you? Ask for a correction.