Frontier AI lab building general-purpose AI systems including ChatGPT and GPT-5
AI📍 San Francisco, CAFounded 2015
Current Valuation
$852B
as of 2026-Q1
CENTURION
OpenAI is the AI lab behind ChatGPT, GPT-5, and the o-series reasoning models. Originally founded as a non-profit, it now operates a capped-profit subsidiary majority-funded by Microsoft and SoftBank. In March 2026 it closed a record $122B primary round at an $852B post-money valuation (anchored by Amazon, Nvidia, and SoftBank) — the largest private fundraise on record, ranking it among the most valuable private companies in the world.
Step-up compares disclosed post-money valuations. Round / post-money is a financing-size ratio, not an ownership or dilution estimate.
Secondary Market
Implied price / share
$703.69
Secondary price return by period
Implied per-share price from private secondary transactions, as of Jun 2026. This is a point estimate, not a quote — the feed carries no bid, ask or spread, and a secondary print is evidence of what someone paid on that date rather than a live market. Compare across every tracked name →
Growth & Valuation
Valuation across funding rounds
Valuation step-up per round
Capital raised per round
Estimated revenue trend
Charts built from publicly disclosed funding rounds and revenue estimates. Approximate, not real-time, not investment advice.
Funding History
Round
Amount
Date
Lead Investor
Post-Money
Late-stage primary
$122B
Mar 2026
SoftBank
$852B
Secondary (tender)
$6.6B
Oct 2025
Employee tender
$500B
Late-stage
$40B
Mar 2025
SoftBank
$300B
Late-stage
$6.6B
Oct 2024
Thrive Capital
$157B
Microsoft investment
$10B
Jan 2023
Microsoft
$29B
Founders & Key People
Sam AltmanGreg BrockmanIlya SutskeverElon MuskWojciech Zaremba
Investors
Microsoft · SoftBank · Nvidia · Amazon · Thrive Capital · Khosla Ventures · Sequoia · Andreessen Horowitz · MGX · T. Rowe Price
Products
ChatGPT (consumer)
GPT-5 / o-series API
Sora (video)
DALL-E 4
Operator (agents)
ChatGPT Enterprise
Competitors
Anthropic · xAI · Google DeepMind · Mistral AI
AIFoundation ModelsDecacornTop 3 AI Lab
Private-company numbers are not real-time. Reflects publicly disclosed valuations from press releases, news reports, and tender offers as of 2026-Q1. Refreshed quarterly.