OpenAI · Series D

Creator of ChatGPT, GPT-4, and the leading frontier AI lab.

Amount

$40B

Round

Series D

Valuation

$300B

Announced

Mar 2025

Investors

Lead investor

Participating investors

Coatue Management

Notes

SoftBank led $40B round

Other OpenAI rounds

Date	Round	Amount
Mar 2026	Series E	$122B	Details →
Oct 2025	Series b	$10.3B	Details →
Jan 2024	Series a	$10B	Details →
Jan 2023	Series C	$10B	Details →
Jan 2021	Series B	$1B	Details →
Jul 2019	Series A	$11M	Details →