Private Founded 2015 San Francisco, California

OpenAI stock.

OpenAI is the maker of ChatGPT and the GPT family of models. It raised at a $340B valuation in 2025 and has discussed a potential IPO, though no filing date has been set. Microsoft is its largest backer and cloud partner.

Full coverage

For in-depth OpenAI tracking, visit OpenAI Stock.

Our dedicated site covers OpenAI's IPO filing status, valuation, funding rounds, and how to buy shares in more detail than we publish here.

Visit OpenAI Stock →

Key facts.

Company OpenAI
Product ChatGPT, GPT-4o
Valuation $340B (2025 funding round)
Total raised $60B
Founders Sam Altman, Elon Musk (departed 2018), Greg Brockman
Key investors Microsoft, SoftBank, Tiger Global, Sequoia Capital
IPO status Private — no confirmed IPO date
Last updated 2026-06-01

Other pre-IPO AI companies.

Anthropic $965B post-money (Series H, May 2026) Mistral AI $6B (2024 Series B) Perplexity AI $9B (2024 funding round) Scale AI $14B (2024 funding round)