Union Square Ventures

Union Square Ventures is a New York firm founded in 2003 that invests at seed, Series A and Series B and beyond, with current sector emphasis on climate and fintech. Its thesis has been unusually stable for two decades: back large networks of engaged users that create sustainable competitive advantages and significant value over time. Assets under management are recorded at $1.9 billion, though SEC filings show more than $3.3 billion in committed capital across its vehicles since 2010.

The structure is the strategy. USV raises deliberately small dated core funds, roughly $166 million to $275 million each across the 2014 through 2024 vintages, so that a single outcome can return a fund, and pairs each with a larger opportunity vehicle to concentrate into winners later. A dedicated climate line launched in 2021. Only with USV 2026, filed at a $500 million target, has the core fund size broken meaningfully from that discipline. The partnership is small, roughly a dozen investors, and adds partners slowly: Rebecca Kaden from the 2019 fund, Nick Grossman from 2021, Michael Mignano on the 2026 vehicle.

Notable portfolio companies include Twitter, Tumblr, Foursquare, Etsy, Coinbase, Stripe, Kickstarter and Duolingo, a list that tracks the network-effects thesis across social, marketplaces, crypto and consumer subscription. What distinguishes USV is how publicly it reasons: co-founder Fred Wilson's AVC and Albert Wenger's Continuations have published firm strategy almost daily for years, making the fund's thinking legible to management teams before any pitch.