OpenAI closed its $122 billion funding round on March 31, 2026 at a post-money valuation of $852 billion, making it the most valuable private company in history. The round eclipses the $110 billion figure the company publicly announced on February 27, 2026; 32 days later the total had grown by $12 billion of committed capital.
Round composition:
- Co-leads: SoftBank, a16z, D. E. Shaw Ventures, MGX, TPG, accounts advised by T. Rowe Price Associates
- Strategic partners: Amazon, Nvidia, SoftBank (existing)
- Institutional participants: Altimeter, Appaloosa, ARK Invest, BlackRock-affiliated funds, Blackstone, Coatue, D1 Capital, Dragoneer, Fidelity, Insight Partners, Paragon, Sands Capital, Sequoia, Temasek, Thrive Capital, UC Investments, Winslow Capital
- Retail component: $3 billion raised from retail investors, first time OpenAI opened its cap table at that scale
Why this number:
The money is compute, power, and data-center buildout through 2027-2028.
Implications:
- IPO anticipation building. CNBC headlines frame the round as pre-IPO positioning. An OpenAI public offering in 2027 is now the base case.
- Competitive pressure on every frontier lab. Anthropic raised at ~$50B in late 2025; xAI at ~$35B. OpenAI’s 10-20× valuation premium is now a recruiting and partnership weapon.
- Big Tech AI capex race intensifies. Microsoft, Google, Amazon, Meta, Nvidia all committed $100B+ each to AI infra through 2026. OpenAI’s $122B is the startup-side equivalent.
- Nvidia + Broadcom + AMD as picks-and-shovels winners. Every dollar raised by a frontier lab eventually flows to silicon.
The 852 context: $852B is roughly the market cap of ExxonMobil or Costco in 2026. That’s the stated private-market value of a single AI lab versus a multinational oil or retail giant.
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