Union Square Ventures

About

Union Square Ventures (USV) is a thesis-driven venture capital firm headquartered in New York City, founded in 2003 by Fred Wilson and Brad Burnham ¹². The firm raised its first fund of $125 million in 2004 and has since managed over $1 billion across seven funds ¹³. USV’s most recent core fund was $275 million, raised in 2022 ³. The firm currently operates three investment strategies: a core fund for early-stage seed and Series A investments, a climate fund for early-stage climate mitigation and adaptation startups, and an opportunity fund for later-stage and special situations ¹.

USV’s 2004 fund is widely recognized as one of the best-performing venture capital funds in history ². In 2011, USV was named the best-performing venture capital firm in the United States based on investment return rate ². The firm has backed more than 130 startups, including Twitter, Etsy, Coinbase, Tumblr, Zynga, Kickstarter, Stack Overflow, MongoDB, and Stripe ²⁴. USV operates as a small, collegial partnership with all partners investing across all sectors rather than maintaining individual sector specializations ¹.

Fred Wilson has been a venture capitalist since 1987 and is known for his influential blog AVC, which he has written daily since 2003 ⁵. Before USV, Wilson co-founded Flatiron Partners in 1996 ⁵. Brad Burnham previously worked at AT&T Ventures starting in 1993 ⁴.

Stated Thesis

USV’s investment thesis has evolved through three major versions. The original thesis (2004) was to “invest in large networks of engaged users, differentiated by user experience, and defensible through network effects” ⁶. This drove early investments in Twitter, Etsy, Tumblr, Foursquare, and Kickstarter ⁶.

In 2018, USV published Thesis 3.0, authored by partner Rebecca Kaden: “USV backs trusted brands that broaden access to knowledge, capital, and well-being by leveraging networks, platforms, and protocols” ⁶. The thesis encompasses three domains: knowledge (education, data, ideas), capital (financial services, human capital, infrastructure), and well-being (health, wellness, community) ⁶.

The firm states: “Trust comes from true alignment and convincing the customer that their values and priorities are shared” and “The goal of these businesses is to build trusted brands — products and services that not only serve a purpose, but integrate into the hearts and minds of their customer in a way that is durable and important” ⁶.

USV also emphasizes its deliberate choice of smaller fund sizes. The firm describes itself as acting as lead or co-lead investors, taking active roles in company development, and maintaining long-term founder partnerships ¹.

Fred Wilson has stated: “This is not spray and pray, this is not following the herd, this is not momentum investing. This is thesis-driven, active early stage investing, which has always produced the best returns over time and I believe always will” ⁵.

Inferred Thesis

Based on USV’s portfolio of 130+ startups and 509 total investments across 234 companies ⁷⁸:

Sector distribution: USV has invested in 198 tech companies, 133 enterprise (B2B) companies, 112 software companies, and 100+ consumer (B2C) companies ⁷. The portfolio shows particularly heavy concentration in network-effect businesses, marketplaces, and platforms. Crypto and Web3 investments represent a significant allocation, including Coinbase, Helium, and Protocol Labs.

Stage distribution: USV operates primarily at seed and Series A, consistent with their stated focus. Their opportunity fund handles later-stage follow-on investments ¹.

Geographic concentration: 160 of USV’s investments are in U.S.-based companies, with 12 in the United Kingdom ⁷. This is heavily NYC-skewed relative to the broader VC industry, reflecting the firm’s New York headquarters.

Fund size discipline: USV has deliberately maintained smaller funds ($125M to $275M for core funds) compared to peers, a distinctive strategic choice that limits portfolio size but aligns GP incentives with returns rather than management fees ¹³.

Co-investor patterns: USV frequently co-invests with Andreessen Horowitz, Spark Capital, and Sequoia. The firm’s early-stage focus means later rounds typically bring in larger growth-stage firms.

Notable patterns vs. stated thesis: The firm’s heavy allocation to crypto and Web3 (Coinbase, Helium, Protocol Labs, etc.) aligns with Thesis 3.0’s emphasis on “protocols” but represents a more aggressive bet on decentralization than the thesis’s language about “trusted brands” would suggest. The climate fund represents a more recent expansion beyond the core thesis.

Portfolio

This table represents approximately 17 of 130+ known startup investments. USV’s portfolio of 234 companies includes follow-on investments ⁷⁸.

USV’s early $5 million Coinbase stake was valued at $4.6 billion at the company’s 2021 IPO ⁹. As of 2016, USV had achieved seven exits valued at $1 billion or more ¹⁰.

In Their Own Words

“This is not spray and pray, this is not following the herd, this is not momentum investing. This is thesis-driven, active early stage investing, which has always produced the best returns over time and I believe always will.” — Fred Wilson, AVC blog ⁵

“Our job is to turn $1 into $10 over a decade.” — Fred Wilson ⁵

“Invest in large networks of engaged users, differentiated by user experience, and defensible through network effects.” — Brad Burnham, describing USV’s original thesis ¹

“USV backs trusted brands that broaden access to knowledge, capital, and well-being by leveraging networks, platforms, and protocols.” — Rebecca Kaden, USV Thesis 3.0, April 2018 ⁶

What Founders Say

No independently sourced founder testimonials found. USV’s portfolio founders have not been widely quoted in accessible sources about their specific experience working with USV as investors. The firm’s reputation is primarily evidenced by its track record of returns and the quality of its portfolio companies.

Sources