Ann Miura-Ko

Co-Founding Partner, Floodgate
Ann Miura-Ko, with a PhD in computer security modeling, uses a full-stack power framework to assess team strength, secrets and category potential, co-founding a firm to hunt thunder lizard companies.
How to contact Ann Miura-Ko
Stages their fund invests in
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Avg Check
$500K - $5M
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Does their fund Lead?
Yes
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Geos their fund invests in
USA
Ann Miura-Ko
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Sectors their fund invests in
AI
Consumer
Enterprise
Fintech
Health
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$500K - $5M
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Leads?
Yes
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About Ann Miura-Ko

Ann Miura-Ko brings a rare combination of deep mathematical expertise (PhD in computer security modeling) and the ability to evaluate startups through her distinctive "full-stack power" framework that looks beyond product-market fit to assess team power, proprietary secrets, and category-defining potential. She co-founded Floodgate specifically to hunt "thunder lizard" companies that can reshape entire categories, drawing on her experience defending her PhD dissertation six weeks after giving birth while simultaneously launching the fund and making early investments like ModCloth.

Ann Miura-Ko's Interests

What they've been talking about across their social media accounts
  • A macro investment thesis centered on the concept of Mass Cognition, which is viewed as the third major technological shift following Mass Compute and Mass Connectivity. This framework suggests that while previous eras democratized processing power and access to information, the current era is democratizing intelligence itself by allowing machines to adapt to human language.
  • Distinction between fundraising expectations for deep tech versus application-layer startups. The specific advice highlights that companies solving technical risk, such as AI infrastructure, justify large early checks to prove feasibility, whereas consumer or market-risk companies are expected to show traction and revenue before raising similar amounts.
  • Frustration with grade inflation in startup fundraising terminology. There is a strong preference for calling rounds what they arguably are based on capital raised; for instance, raising over ten million dollars is viewed as a Series A rather than a Seed round, as the amount of capital dictates the milestones and expectations required for the next stage.
  • Identification of founders who fit the "superbuilder" or "superthinker" archetypes. High praise is often directed at founders who exhibit contrarian thinking and extreme discipline, with frequent references to the leadership at Applied Intuition as a model for building legendary companies without getting caught up in distractions.
  • Deep engagement with university talent ecosystems, particularly through initiatives at Stanford like the Mayfield Fellows Program. There is a consistent effort to connect student builders with high-growth startups, frequently citing successful alumni who founded companies like Instagram and Gusto to demonstrate that impactful founders often emerge directly from academic environments.
  • Active exploration of personal knowledge management and how AI changes daily workflows. This involves soliciting recommendations for AI-integrated replacements for tools like Roam or Notion and discussing how new software creates efficiency or, in some cases like scientific research, potentially narrows the scope of human inquiry.

About their Fund

Sectors
AI, Consumer, Enterprise, Fintech, Health
Rounds
Pre-Seed - Seed
Avg Check Size
$500K - $5M

Floodgate pioneered the "micro-VC" model with deliberately small funds and very small initial checks, positioning themselves as one of the first firms purpose-built for pre-seed investing. The firm builds its strategy around "thunder lizards" and "pattern-breaking" startups, explicitly looking for non-consensus, inflection-driven businesses and has developed proprietary "inflection theory" and "pattern breakers" frameworks to evaluate ideas and pivots rather than just traction or markets.

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