Founders Fund IX, LP
Founders Fund IX, LP is a venture capital fund based in San Francisco, California. According to its most recent Form D, filed Oct 16, 2025, it has sold $971,584,000 of interests to 235 investors since its first sale in Apr 2023. The filing does not set a minimum investment. It relies on the Section 3(c)(7) exclusion, so investors generally must be qualified purchasers. The offering uses Rule 506(b), which does not permit general solicitation. Related persons named in the filing include The Founders Fund IX Management, LP; Peter Thiel; FF Upper Tier GP, LLC.
- Total raised
- $971,584,000Cumulative sales reported on Form D
- Investors
- 235
- First sale
- Apr 7, 2023
- Minimum investment
- None set
- Who can invest
- Qualified purchasersSection 3(c)(7): generally $5M+ in investments
- Offering exemption
- Rule 506(b)No general advertising
- Key people and entities
- The Founders Fund IX Management, LP; Peter Thiel; FF Upper Tier GP, LLC
- Latest Form D
- Oct 16, 2025
From SEC filings, not verified. This page republishes the fund's Form D as filed. It is not an offer, solicitation or recommendation, and AltMountain has not reviewed the fund. “Raised” is cumulative sales, not current assets or performance. Returns are not part of SEC filings. Private funds are speculative, illiquid and generally limited to accredited investors or qualified purchasers. Full disclosures · Request a correction
Questions about Founders Fund IX, LP
What is the minimum investment for Founders Fund IX, LP?
Founders Fund IX, LP's latest Form D, filed Oct 16, 2025, does not set a minimum investment. Managers can still require one in the offering documents.
Who can invest in Founders Fund IX, LP?
Founders Fund IX, LP is generally open only to qualified purchasers (generally individuals with at least $5 million in investments), because it relies on Section 3(c)(7). It uses Rule 506(b), which does not allow general advertising.
How much has Founders Fund IX, LP raised?
Founders Fund IX, LP reports $971,584,000 sold from 235 investors on its Form D filed Oct 16, 2025. This is cumulative sales since the offering began, not current assets or performance.
Where is Founders Fund IX, LP based?
Founders Fund IX, LP is based in San Francisco, California.
When did Founders Fund IX, LP launch?
Founders Fund IX, LP reports its first sale in Apr 2023.
Size compared with every venture capital fund
Raised more than 99% of the 2,268 venture capital funds based in California, and more than 100% of all 15,160 that report sales.