Dick Costolo is the Managing Partner and Co-Founder of 01 Advisors. See portfolio, sector focus and contact routes.
Dick Costolo is the Managing Partner and Co-Founder of 01 Advisors, a venture firm he launched in 2018 with former Twitter COO Adam Bain to help companies scale after achieving product-market fit[1][2]. His investment thesis targets post-product-market-fit businesses, primarily focusing on Series B-stage startups in the business software and fintech sectors[8]. The firm typically invests $10–20 million per deal, though some sources cite a broader range of $2–15 million, with a focus on late-stage private technology companies[2][6]. Notable portfolio companies include Attio, Linear, and BuildOps, all of which operate in the software and enterprise technology space[6]. Costolo leverages his operational experience as Twitter’s former CEO (2010–2015) to mentor founders on scaling from product to mature enterprise[1][2]. He has publicly shared insights on “The Twitter Learnings,” emphasizing operational scaling and the transition from startup to public company, and served as a consultant on HBO’s *Silicon Valley*[1][7].
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