Founders Fund
About Founders Fund
Lounge's deals desk lists Founders Fund in AI rounds, newest first. The most recent is a Cognition Series E of $2B in 2026-09, which the desk marks as led. The same desk shows a Cognition Series D of $1B in 2026-05, an Anduril Industries Series H of $5B in 2026-05, a Ramp Series F of $750M in 2026-06, and an Anthropic Series G of $30B in 2026-02. Early-stage entries include Lightsprint (Seed, $6.1M, 2026-10), Pally (Seed, $3.5M, 2026-08), Monid (Pre-seed, $2.1M, 2026-09), Sume (Pre-seed, amount undisclosed, 2026-08, marked as led) and Gamgee (Seed, $4M, 2026-08, marked as led). The desk also lists a reported Ramp growth round of $1.85B in 2026-10, which is unconfirmed.
Founders Fund's public tags list Seed, Series A, Series B and Series C+. Lounge's deal records also show pre-seed rounds and later rounds through Series H. No public check size range was confirmed for this profile, so none is listed.
- Anthropic: Series G, $30B (2026-02)
- Anduril Industries: Series H, $5B (2026-05)
- Cognition: Series D, $1B (2026-05); Series E, $2B (2026-09, marked as led)
- Ramp: Series F, $750M (2026-06); growth round reported at $1.85B (2026-10, unconfirmed)
- Lightsprint: Seed, $6.1M (2026-10)
- Gamgee: Seed, $4M (2026-08, marked as led)
- Pally: Seed, $3.5M (2026-08)
- Monid: Pre-seed, $2.1M (2026-09)
- Sume: Pre-seed, amount undisclosed (2026-08, marked as led)
Investing activity
Founders Fund appears in 11 AI deals tracked by the AI Lounge deals desk, rounds totalling $40.6B, and led 3 of them. The rounds are mostly Seed, Pre-seed and Growth, with a median round size of $1B and the largest at $30B. The most recent are Lightsprint (Seed, $6.1M, Oct 2026), Ramp (Growth round (reportedly), $1.85B, Oct 2026) and Cognition (Series E, $2B, Sep 2026).
Founders Fund most often invests alongside Y Combinator, Thrive Capital, General Catalyst and Andreessen Horowitz, and the companies it backs on AI Lounge are mostly in AI, AI finance automation and AI coding agents.
Deals
Frequently asked questions about Founders Fund
Does Founders Fund invest in AI startups?
Yes. Lounge's deals desk lists the firm in AI rounds from pre-seed to Series H, including Anthropic, Cognition, Anduril Industries and Ramp.
What stages does Founders Fund invest in?
Its public tags list Seed, Series A, Series B and Series C+. Lounge's deal records also show pre-seed rounds and later rounds through Series H.
Does Founders Fund publish its check sizes?
No public check size range was confirmed for this profile. Lounge's deal records show only round amounts, such as $3.5M for Pally's seed round.
Where is Founders Fund headquartered?
The firm is headquartered in San Francisco, US.
Where can I find Founders Fund's website and LinkedIn page?
The website is foundersfund.com and the LinkedIn page is linkedin.com/company/founders-fund.
What AI companies has Founders Fund invested in?
Founders Fund's AI investments include Lightsprint, Ramp, Cognition, Monid, Sume, Gamgee, Pally and Anduril Industries. The 11 rounds on AI Lounge are listed on this page with amounts, dates and co-investors.
Where is Founders Fund based?
Founders Fund is based in San Francisco, US.
What stage does Founders Fund invest at?
In the rounds tracked on AI Lounge, Founders Fund has invested at Seed, Pre-seed, Growth and Series E, with a median round of $1B. Founders Fund led 3 of those rounds.
Who does Founders Fund co-invest with?
Founders Fund's most frequent co-investors on AI Lounge are Y Combinator (3 deals), Thrive Capital (2 deals), General Catalyst (2 deals), Andreessen Horowitz (2 deals) and GIC (2 deals).
How can founders reach Founders Fund?
Founders on AI Lounge can see Founders Fund's contact details in AI Investor Contacts (paid plans), check for a warm introduction through members who worked with the firm under Warm Paths, and add Founders Fund to their Investor Pipeline to track the conversation.