Tony Tsao
Partner at Employee Stock Option Fund | ESO Secondary Fund
San Mateo, California
Tony Tsao, Partner at Employee Stock Option Fund | ESO Secondary Fund is an active investor based in San Mateo, California. This profile covers what Tony Tsao backs, at which stage, and how founders can reach out in 2026.
Partner at ESO Venture Fund focused on growth-oriented, technology and healthcare companies, with experience in venture debt, secondary direct, venture capital and growth equity.
Tony Tsao invests in Healthcare & Biotech and SaaS & Enterprise, typically at Early Stage Venture and Late Stage Venture.
- Investor type
- VC
- Stages
- Early Stage VentureLate Stage Venture
- Invests in
- Healthcare & BiotechSaaS & Enterprise
- Location
- San Mateo, California
- Typical check
- $3.8M
How to reach Tony Tsao
Angels and operators like Tony Tsao reply to specific, personalized notes that show real traction, not mass blasts. Build a verified list, write a note that fits their thesis, and track replies, all on Round Funded.
Reach active investors like this one
About this profile
This profile is part of Round Funded, an investor database and outreach platform for founders. It covers 60,000+ active VCs, angels, family offices and accelerators with verified contacts, lets you send pitches from your own Gmail, and includes a free Data Room for your raise. How this data is built.
Cite this page
Round Funded. "Tony Tsao." Round Funded investor database, updated November 3, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/tony-tsao
Frequently Asked Questions
Who is Tony Tsao?
Tony Tsao, Partner at Employee Stock Option Fund | ESO Secondary Fund is an active investor based in San Mateo, California. Tony Tsao invests in Healthcare & Biotech and SaaS & Enterprise, typically at Early Stage Venture and Late Stage Venture.
What does Tony Tsao invest in?
Tony Tsao invests in Healthcare & Biotech and SaaS & Enterprise, typically at Early Stage Venture and Late Stage Venture. Match your sector and stage, then reach out with a personalized pitch.
What stage does Tony Tsao invest at?
Tony Tsao typically invests at Early Stage Venture and Late Stage Venture. Lead with traction that fits the stage when you reach out.
What is Tony Tsao's typical check size?
Tony Tsao typically writes checks around $3.8M. Use it as a signal for whether your raise fits their stage.
How do founders reach investors like this?
Round Funded lists active investors with verified, professional contact details for signed-up founders. Filter by sector, stage and location, then send a personalized pitch from your own inbox.
What is Round Funded?
Round Funded is an investor database and outreach platform for startup founders. It lists 60,000+ active investors with verified contacts, filtered to recent investment activity, and lets founders send personalized pitches from their own Gmail, track replies, and share a free Data Room. Round+ starts at $99 per month with a 3-day trial.