Dr. Kathy Fields + Dr. Garry Rayant
Dr. Kathy Fields and Dr. Garry Rayant run a San Francisco family office that backs breakthrough water and climate technology. The husband-and-wife founders of the skincare brands Proactiv and Rodan + Fields now put capital behind companies building water-resilient cities. As of 2026 the office has backed one water company, Epic Cleantec, across three rounds from Seed to Series B.
Compiled by Antoine Walter, (don't) Waste Water, from official filings and direct intelligence in Leviathan.
The take
Dr. Kathy Fields and Dr. Garry Rayant are not the names you expect to find backing a water-tech company. She is the Stanford-trained dermatologist behind Proactiv and Rodan + Fields; he is a San Francisco periodontist and magazine founder. Together they run a family office, a private firm that invests one family's own wealth, and they have aimed a slice of it at water.
Fields and Rayant invest impact first. They describe their bar as big, impactful, world-changing ideas, and in water that has meant urban resilience: the plumbing of cities being asked to do more with less. Their water bet, Epic Cleantec, recycles up to 95% of a building's wastewater on site, turning San Francisco towers into their own miniature treatment plants.
The Fields-Rayant office looks narrow on paper, one water company, Epic Cleantec, backed across three rounds from Seed to Series B. That concentration is the point. Rather than scatter small cheques across a sector they are still learning, these two have stayed with a single company they believe in, from its early days into its scale-up.
The Fields-Rayant office reads, in the end, as a conviction-led impact investor rather than a dedicated water fund. Water shows up because clean, circular cities fit a worldview shaped by two careers in medicine and a shared habit of backing big ideas. Where that conviction travels next is the thing I would watch.
Water Commitment Score
Compiled from official filings, third-party records, and direct intelligence from investors and founders, in Leviathan · recomputed monthly · as of Jun 2026.
How they invest
Portfolio · 1 water companies
Invests alongside
Highlighted = profiled on (don't) Waste Water.
Frequently asked
- What does the Dr. Kathy Fields and Dr. Garry Rayant family office invest in?
- The Fields-Rayant family office backs breakthrough water and climate technology with an impact-first lens. Its public water investment is Epic Cleantec, a San Francisco company that recycles building wastewater on site. The office favours ideas it calls big and world-changing over a narrow, fixed sector mandate.
- Who are Dr. Kathy Fields and Dr. Garry Rayant?
- Dr. Kathy Fields is a Stanford-trained dermatologist and co-founder of the skincare brands Proactiv and Rodan + Fields. Dr. Garry Rayant is a San Francisco periodontist and co-founder of Dear Doctor magazine. The married couple invest, and give to charity, through a shared family office.
- What stage does the Fields-Rayant family office invest at?
- The Fields-Rayant family office invests across early to growth stages. Its water holding, Epic Cleantec, it has backed through Seed, Series A and Series B rounds, the successive funding rounds a startup raises as it grows from an early product into commercial deployment at scale.
- Where is the Dr. Kathy Fields and Dr. Garry Rayant family office based?
- The Fields-Rayant family office is based in the San Francisco Bay Area, California, where both founders built their careers in medicine and skincare. Its water investment, Epic Cleantec, is also a San Francisco company, reflecting the office's focus on resilient, sustainable cities.
- Is the Fields-Rayant family office the same as Rodan + Fields?
- No. Rodan + Fields is the skincare company Dr. Kathy Fields co-founded with Dr. Katie Rodan. The Dr. Kathy Fields and Dr. Garry Rayant family office is a separate, private investment vehicle the couple use to back water and climate startups such as Epic Cleantec.