Overwater Ventures Research
Investment Thesis
Overwater Ventures is a solo-GP-led, early-stage venture firm founded by Kristina Simmons in 2021, focused on backing breakthrough technology that improves global health and the health of the planet. The firm's stated mission is "commercializing breakthrough technology to solve the world's biggest problems," with particular conviction that AI, data science, neuroscience, and biotech are accelerating the pace of innovation across two core verticals: Human Health + Wellness and Healthy Environment + Infrastructure. Overwater positions itself as more than a capital source — it runs a hands-on, founder-support platform covering fundraising, team/culture, BD and partnerships, product roadmap, sales, strategic planning, launch, and marketing, styled internally as "Groundswell."
Stage Focus
Overwater invests almost exclusively at pre-seed and seed stage, explicitly aiming to be the first institutional check into a company, often pre-product or pre-revenue. The firm frequently leads or co-leads the founding team's first institutional round.
Check Size
Typical initial check size is $400K–$2M (the firm's own site states "$400k-$2m"; earlier press coverage cited a $500K–$2M range), targeting 5–15% ownership per investment.
Lead Tendency
Overwater explicitly leads: "We lead your earliest round... and tap into our strong network of VCs and strategics to bring in others." This is consistent with third-party coverage describing Kristina Simmons as a solo GP who takes an active lead role in the rounds she enters.
Recent Activity
Overwater closed its $20M debut Fund I in April 2023 (Businesswire, Forbes, Fortune, Cooley, Venture Capital Journal all covered the close), reportedly among the earliest wave of women-led funds raised that year. By June 2023 the fund had already made 11 investments. Third-party trackers (Tracxn, PitchBook, Caplight) show continued deployment through 2026: Tracxn cites 11 tracked portfolio companies with 5 new investments in the trailing 12 months as of August 2026, and PitchBook/Caplight both list Apaluma (environmental-data AI) as the firm's most recent investment, dated mid-July 2026. This is consistent with an actively-deploying fund investing steadily at pre-seed/seed since 2021.
Portfolio Highlights
Overwater's public portfolio page lists 19 companies split across "Human Health" and "Planet Health" categories, spanning biotech, fertility/reproductive health, cancer precision medicine, gut health diagnostics, AI-enabled imaging, agtech/ag-genetics, and climate/environmental-data AI. Standouts include Overture Life (fertility access, backed by high-profile operators like Martin Varsavsky), Gameto (biotech targeting infertility/menopause), Zero Acre Farms (novel cooking oil alternative), Tiny Health (infant/maternal gut microbiome testing), Adaptyx Biosciences (generalizable biosensor platform, led by Overwater's own technical advisor Vijit Sabnis), and Overstory (AI/ML vegetation analysis for wildfire and power-outage prevention, which the firm's LinkedIn notes was ranked #151 on the 2026 Inc. 5000).
Team
- Kristina Simmons — Founder & Managing Partner. Former a16z partner (market development) and Chief of Staff/investment partner at Khosla Ventures (Seed–Series D board seats); earlier led digital/e-commerce and Emerging Products at lululemon. Founded Overwater in 2021 to bring a more founder-centric model to venture.
- Maria Molland — Advisor. 25+ years as investor/operator/board director in consumer and healthcare; former CEO of Thinx (sold to Kimberly-Clark, 2022); prior executive roles at eBay, Yahoo, Thomson Reuters, Dow Jones, Fab.com, Disney.
- Ivy Ross — Venture Partner. Chief Design Officer, Consumer Devices at Google; named one of Business Insider's 15 Most Powerful Women at Google; co-author of "Your Brain on Art."
- Vijit Sabnis — Technical Advisor. CEO/co-founder of portfolio company Adaptyx; former partner at Khosla Ventures (deep tech/biotech); co-founder/CEO of Solar Junction; PhD, Electrical Engineering, Stanford.
- Carolyn Coles-Devine — Head of Platform and Operations. 20+ years scaling consumer brands (lululemon, Canada Goose, Northern Reflections) before joining Overwater to run platform strategy and founder support.
- Alan Mardinly, PhD — Science Advisor. Director of Biology and co-founder at Science Corporation; former Neuralink technical staff/leadership; PhD Neurobiology, Harvard.
- Alan Ashworth, PhD — Advisor. President, Helen Diller Family Comprehensive Cancer Center (UCSF); co-discoverer of BRCA2; scientific co-founder of Tango Therapeutics; board member, CytomX Therapeutics.
Decision Process
Overwater is run as a solo-GP fund — Kristina Simmons is the sole Managing Partner and primary decision-maker, supported by advisors and a venture partner rather than a traditional multi-partner investment committee.
Founder Preferences
The firm looks for "wildly ambitious founders with a clear vision," pursuing massive societal impact in multi-billion-dollar markets via breakthrough technology or science, with a credible path to a billion-dollar-plus outcome within a decade. Overwater emphasizes technical founders moving from R&D toward product launch and commercialization, and frames founder wellbeing/personal development (drawing on Kristina's lululemon background) as core to its support model.
Geographic Focus
Headquartered in San Francisco, CA. Third-party sources describe its investable geography as the United States, with selective activity in Europe and Canada; the firm's own site does not state an explicit geographic restriction.