Harrison Valner is the Managing Partner and Founder of Seaside Ventures. See sector focus and contact routes.
Harrison Valner is the Managing Partner and Founder of Seaside Ventures, a venture firm he co-founded in 2021 with Ryan Roddy to advance science-driven consumer health technologies. His investment thesis targets pre-seed, seed, and Series A stages across consumer health, biotech, pharmaceuticals, medical devices, food and beverage, and wellness, primarily in the United States. The firm typically writes $250,000 checks and acts as a strategic partner helping founders scale from concept to commercialization. Notable portfolio companies include Plan A (non-hormonal male contraception), Somnee Sleep (smart sleep headband), ZBiotics (genetically engineered probiotic), and Strive (AI-driven sepsis management). Valner emphasizes diversity and female founders in health-related sectors while leveraging his operational background in logistics and consumer health product development to support portfolio companies. He previously launched and sold Kyoku, a personalized superfood nutrition brand for endurance athletes, before founding Seaside.
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