Tony Siress is a Managing Partner at Gaingels, whose known portfolio counts 19 companies.
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Investment focus
Contacts
Affiliated funds' portfolios
Managing Partner at Gaingels, whose known portfolio counts 19 companies
- Momentum
- Yumi
- Reliable Robotics
- Ezra AI
- Sage Haven
- Parsley Health
- Alloy Therapeutics
- Impossible Metals
- Mermaid Chart
- Brev.io
- Future Fertility
- Louisa AI
- and 7 more
Investor Profile
Tony Siress is listed against sectors AI, Commerce, Consumer and FinTech, and focus areas AI Applications, Analytics, Biotech and D2C in the database.
Stage-wise, the deals at Gaingels cluster around Growth, Pre-Seed and Seed rounds.
What the affiliated firm has backed is the closest available signal on whether Tony Siress is worth approaching.
Colleagues at Gaingels
Showing 20 of 31
Lorenzo Thione
OG AI Founder (2003)
Chicago, United States
Paul Grossinger
Founder
New York, United States
David Gutelius
Member, Investor, Advisor
Reno, United States
Wasim Ahmad
Member
New York, United States
Robert Lennox
Angel Investor
Los Angeles, United States
Eileen Coskey Fracchia
Angel Investor
Los Angeles, United States
Jana Mike
Investor
San Francisco, United States
Alan Masarsky
Investor
Los Angeles, United States
Gregg Smith
Member
New York, United States
Brandon Parkes
Advisor
New York City, United States
Melissa Withers
Member
Boston, United States
Cathal O'Dea
Venture Capital & Operations
New York City, United States
Cristian Raygoza
Venture Partner / prev. CoS
San Francisco, United States
Peter Steinberg
Managing Partner
Brooklyn, United States
Stephanie A. Rieben-de Roquefeuil
Limited Partner
New York, United States
Yves Ançay Crosato
Investor
Brazil
Tyshaia Earnest
Storyteller, Community Builder & Venture Capitalist
New York, United States
Halla Bergsdóttir
Global Investors
St Louis, United States
David Trujillo
Investor
Palma, Spain
Rishabh Surendran
Investor
New York City, United States
Frequently asked questions
Who is Tony Siress?
Tony Siress is a syndicate member based in Austin, Texas, United States, listed as Managing Partner at Gaingels. The known portfolio of that firm counts 19 companies. That portfolio belongs to the firm, not to Tony Siress personally.
What does Tony Siress invest in?
Listed sectors include AI, Commerce, Consumer and FinTech; listed focus areas include AI Applications, Analytics, Biotech and D2C. Those tags come from the portfolios of the firms this profile is attached to, so they read as a record of what has been backed rather than a stated preference for what comes next.
What stage does Tony Siress invest at?
Gaingels appears in Growth, Pre-Seed and Seed rounds across its known deals, and Tony Siress is listed there as Managing Partner. Stage is the strongest single filter when you build a target list: an investor with no record at your stage rarely starts with you.
Which firm is Tony Siress listed at?
Tony Siress is listed as Managing Partner at Gaingels. 31 other people in the database share a firm with Tony Siress.
How do I contact Tony Siress?
A LinkedIn page is on file for Tony Siress. It is readable inside RaiseHunt after you create an account. The database holds no email address and no phone number for this profile.
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Data: RaiseHunt investor dataset · Snapshot 5 September 2026 · How this data is built · Report a correction or request removal