Lynne Chou O'Keefe
Define Ventures
Lynne Chou O’Keefe is the Founder and Managing Partner of Define Ventures, one of the largest firms focused on early-stage health tech companies. With $800 million in assets under management. Define Ventures is a high-conviction team with a proven track record in scaling category-defining enterprise, value-based care, and direct-to-consumer companies — including Hims & Hers (HIMS), Livongo (LVGO), and Evolent (EVH).
Prior to Define, Lynne’s experience includes both healthcare operating,
investing, and finance roles. Previously, she was a Senior Partner at Kleiner Perkins
focused on digital health and c