Brian Singerman

Who they are

Brian Singerman is Co-Founder and General Partner of GPx — a Stanford CS grad who co-founded iGoogle at Google, won national Settlers of Catan tournaments in the 1990s, and wrote a $400M check into Anduril at Founders Fund.

Person

Brian took his Stanford CS degree (class of 2000) into There, Inc., an early virtual-world company, before joining Google in 2004 — where he worked as an engineer and executive, co-created iGoogle, and quietly started two investment vehicles on the side: XGYC Fund, a $1M angel fund for ex-Google and Y Combinator founders, and backed Postini, an email security company that Google itself acquired in 2007. He left Google in 2008 for Founders Fund, joining Peter Thiel, Ken Howery, and Luke Nosek when the firm was still young, and spent roughly a decade there rising from Principal to General Partner. His signature move at Founders Fund was a concentrated bet on Anduril — he wrote ~$400M in checks across rounds and publicly championed Palmer Luckey as one of the great innovators of the era. Possibly — he was also a PhD candidate in Computational Biology at Stanford during some stretch of his career, though the timeline isn't fully clear. He speaks widely on podcast circuits — 20VC, Invest Like the Best, This Week in Startups, Software Engineering Daily — on founder evaluation, upside maximization, and why VC is not about downside minimization. He has written for TechCrunch, including 'The Paradox of VC Seed Investing,' and has spoken at Hereticon. The through-line: he entered venture with an engineer's eye, runs concentrated positions on frontier bets, and has never been a conventional portfolio-diversifier.

Company

In July 2025 — effectively this week relative to today — Singerman launched GPx, a new fund he co-founded with Lee Linden, targeting over $500M. Peter Thiel is the marquee backer, potentially providing up to 50% of the total raise. GPx runs a hybrid model: it functions partly as a fund-of-funds, backing emerging VC managers and enabling them to exercise pro-rata rights, while also leading later-stage rounds directly. One early leadership change has already occurred — co-founder Andrew Tulloch departed to join Meta in mid-2025 before the fund closed.

Market

GPx operates in a venture capital market where a wave of new fund structures is emerging to solve a specific ownership problem: early-stage seed managers who find winners often lack capital to maintain stakes at growth rounds. GPx's fund-of-funds-plus-direct model is a direct answer to that gap, sitting between traditional multi-stage funds and pure fund-of-funds vehicles. Named competitors aren't specified in available data, but the competitive set includes large multi-stage platforms and the growing cohort of emerging manager aggregators.

Network

Singerman's tightest named relationships center on the Founders Fund orbit and his new GPx venture. Peter Thiel is both a long-standing professional peer from Founders Fund and the lead financial backer of GPx. Lee Linden, formerly co-founder of Quiet Capital, is Singerman's co-founder at GPx.

Peter Thiel· Co-founder, Founders Fund; lead backer, GPx
Lee Linden· Co-founder, GPx; formerly co-founder of Quiet Capital
Ken Howery· Key leader, Founders Fund
Palmer Luckey· Founder, Anduril — Founders Fund portfolio, publicly praised by Singerman
Andrew Tulloch· Former co-founder, GPx; departed to Meta mid-2025

How they likely show up

Multi-year tenure at Founders Fund (roughly 2006–2018) rising from Principal to GP → thinks in long cycles and earns conviction slowly before committing.
Wrote ~$400M in checks into a single company (Anduril) → high-concentration, high-conviction investor who does not manage risk by spreading thin.
Co-founded XGYC Fund and Postini while employed at Google → high agency; starts things in parallel rather than waiting for permission or a formal mandate.
Podcast circuit presence across 20VC, Invest Like the Best, and This Week in Startups, with consistent themes around upside maximization and founder evaluation → comfortable thinking out loud in public, likely engages well with conceptual debate.
Possibly — PhD candidacy in Computational Biology alongside an investing career → drawn to scientific frontier bets, not just software.
Won national Settlers of Catan tournaments in the 1990s → strategic game-playing is a genuine interest, not a metaphor; likely thinks about competitive dynamics through a systems lens.

Conversation tips

→ He distinguishes sharply between upside maximization and downside minimization as venture philosophies — if you frame any question around risk management or diversification, expect pushback.
→ The Anduril bet is a point of pride and a clear articulation of his thesis on frontier technology; asking him to unpack what made that conviction durable is a genuine opening.
→ He has written specifically about the paradox of VC seed investing — reference the piece if you've read it; he'll know whether you have.
→ He co-founded XGYC Fund for ex-Google, YC founders while still at Google — he respects founders who move before conditions are ideal, so don't frame your own story as waiting for the right moment.
→ Board games and game theory are genuine interests, not small talk — a question about strategic thinking in investing versus competitive games will land better than generic icebreakers.

Toolbox

Openers

Open on GPx's structure — he just launched a fund-of-funds hybrid targeting over $500M that lets emerging managers exercise pro-rata rights; it's a specific structural thesis, not just a new fund, and he co-founded it with Lee Linden this month.
Reference the Anduril memo: he wrote ~$400M in checks into Anduril and went public with the thesis on 20VC — a concentrated defense-tech bet at a time most VCs avoided it is a window into exactly how he builds conviction.
Bring up 'The Paradox of VC Seed Investing' — he authored it for TechCrunch and it summarizes his framework for why seed diversification is a mistake; it's the clearest written signal of how he thinks about portfolio construction.

Discovery questions

GPx combines fund-of-funds mechanics with direct later-stage investing — what problem does that structure solve that a standard multi-stage fund can't?
You wrote $400M into Anduril over multiple rounds — at what point in that process did the position feel obvious versus still contrarian, and what changed your confidence between rounds?
You started XGYC Fund while still at Google and backed Postini before it was acquired by Google itself — how do you think about the tension between operating inside a large institution and running your own investment thesis in parallel?

Avoid

Don't frame venture as a diversification game or use downside-protection language — he has argued publicly and repeatedly that VC is about upside maximization, and leading with risk management signals you haven't engaged with his actual thesis.

Make it yours