Fundraising Fox
Brian Singerman
InvestorFormer Partner Emeritus at Founders Fund
San Francisco, CA
Writes $500K – $150M checks · typically $25M
Midas 2015 · #44Midas 2016 · #36Midas 2017 · #5Midas 2018 · #10Midas 2019 · #28Midas 2020 · #22Midas 2021 · #25Midas 2022 · #43Midas 2023 · #92Midas 2024 · #82Midas 2025 · #84
Find your path to Brian
Sign up to see every warm intro you have to Brian
- Paths you didn't know you had: your email and LinkedIn already hold routes to Brian. We find them for you
- 2nd- and 3rd-degree connections: the friend-of-a-friend routes that take hours to manually find through your inbox or LinkedIn
- Answers now, not in days: momentum is everything in a raise. Skip asking around whether someone knows someone
Days of research, done the moment you sign in, with every route ranked by how warm it is.
Photo: Frankruddy, CC BY-SA 3.0, via Wikimedia Commons ↗
About
Brian Singerman spent over 15 years as a general partner at Founders Fund, where he led the firm's investments in Anduril, Oscar Health and The Boring Company, before moving to partner emeritus at the end of 2024. In 2025 he co-founded GPx with Quiet Capital's Lee Linden, closing a $500 million debut fund backed by Peter Thiel that invests in emerging seed managers and doubles down on their breakout companies.
Contact· published on Brian's own website
Invests in
AI & Machine LearningBiotechDefense TechFintechSpace Tech
Beyond investing
- Founded
- Singerman co-founded the venture capital firm GPx with Lee Linden in 2025. While at Google, Singerman launched a $1 million angel fund called the XGYC Fund, short for 'ex-Google, Y Combinator.'
- Education
- Studied at Stanford University (BS, Computer Science, 1999)
- More
- Singerman founded the personalized web portal iGoogle during his time at Google.
From Brian's own website — common ground for a warm intro.
Deals · 7
LTSE Services, Inc.Board seat
via Founders Fund · filed Aug 2022 · $103.4M raise
SolugenBoard seat
via Founders Fund · filed May 2019 · $20M raise
Cloud9Board seat
via Founders Fund · filed Sep 2017 · $25M raise
AltSchoolBoard seat
via Founders Fund · filed Mar 2016 · $81.2M raise
Mulberry HealthBoard seat
via Founders Fund · filed Apr 2015 · $134.9M raise
MisfitBoard seat
via Founders Fund · filed Jan 2015 · $40M raise
HealthCareLed round
via Founders Fund · filed Oct 2014
Attribution from SEC filings, press coverage, and firm rosters.
Other disclosed investments
Led
Stemcentrx
Board seats
AffirmEmerald TherapeuticsOscar HealthPostmatesThe Long-Term Stock Exchange
Investor
AffirmAnduril IndustriesAzumioCalibrateChronosphereContextLogicGarner HealthInworld AILearner-Centered CollaborativeMisfit WearablesModern HealthNateraNerd StreetOculus VROscar HealthPostmatesPulpo MediaRitualSpotifyStemcentrxThe Climate Corporation (Bayer Crop Science)TrabaTriplebyte
Sources: curated public sources · SEC Form D filings.
Podcasts & interviews
featuring Brian SingermanBrian Singerman: How I Became a Partner at Founders Fund, Why We Put $400M into Anduril | 20VC #943
20VC with Harry Stebbings
Brian Singerman on TWiST #2: How SpaceX and Sean Parker attracted Brian to Founders Fund
This Week in Startups Clips
Gloating LP vs one of the greatest funds in history - Brian Singerman Founders Fund
This Week in Startups
Founders Fund's Brian Singerman on building a legendary VC firm, “Adapt or Die” and "Ikigai" | E1896
This Week in Startups
Brian Singerman (Founders Fund) Shares His Investment Criteria
This Week in Startups Clips
Founders Fund’s Brian Singerman on when we'll see AGI, future of jobs, & polarization of wealth
This Week in Startups
6 more appearances
- E748: LAUNCH Angel Summit: Top VC Brian Singerman Founders Fund (fmr Google)shares best of portfolio2017-07-21
- Brian Singerman on Founders Fund, GPx, and Looking for Greatness | Ep. 562026-09-01
- GPx Co-Founder Brian Singerman on mastering your edge instead of chasing every skill2026-07-11
- GPx Co-Founder Brian Singerman on putting your biggest bets behind the best companies2026-07-09
- GPx Co-Founder Brian Singerman on backing exceptional founders with maximum conviction2026-07-03
- GPx Co-Founder Brian Singerman explains why Elon Musk is a once in a generation founder2026-06-27
Network10
Investors connected to Brian in public investor directories — a warm-intro map.
Frequently asked questions
- Who is Brian Singerman?
- Brian Singerman spent over 15 years as a general partner at Founders Fund, where he led the firm's investments in Anduril, Oscar Health and The Boring Company, before moving to partner emeritus at the end of 2024. In 2025 he co-founded GPx with Quiet Capital's Lee Linden, closing a $500 million debut fund backed by Peter Thiel that invests in emerging seed managers and doubles down on their breakout companies.
- What does Brian Singerman invest in?
- Brian Singerman invests in AI & Machine Learning, Biotech, Defense Tech, Fintech, Space Tech.
- What check size does Brian Singerman write?
- Brian Singerman typically writes checks of $500K – $150M.
- What boards does Brian Singerman sit on?
- Brian Singerman holds tracked board seats at Affirm, AltSchool, Cloud9, Cloud9, Emerald Therapeutics, LTSE Services, Inc., LTSE Services, Inc., LTSE Services, Inc., Misfit, Mulberry Health.
- What companies has Brian Singerman invested in?
- Investments tracked here include Stemcentrx, Affirm, Anduril Industries, Azumio, Calibrate, Chronosphere, Cloud9, ContextLogic, Garner Health, Inworld AI, Learner-Centered Collaborative, Misfit Wearables, and 14 more.
- What podcasts and interviews feature Brian Singerman?
- Tracked appearances include "Brian Singerman: How I Became a Partner at Founders Fund, Why We Put $400M into Anduril | 20VC #943", "Brian Singerman on TWiST #2: How SpaceX and Sean Parker attracted Brian to Founders Fund", "Gloating LP vs one of the greatest funds in history - Brian Singerman Founders Fund", and 9 more.
- Does Brian Singerman lead rounds?
- Yes — Brian Singerman has led 1 tracked investment.
About this profile. Compiled from public sources — Founders Fund's own website, regulatory filings, press coverage and public professional profiles — and summarised by Fundraising Fox; every fact is kept with where it came from. Spotted an error, or would rather not be listed? Email privacy@fundraisingfox.com · How we build profiles · Your rights