OpenAI · Series E

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

Amount

$122B

Round

Series E

Valuation

$852B

Announced

Mar 2026

Investors

Lead investor

Participating investors

Coatue Management

Altimeter Capital

Notes

Mega round — largest ever. Closed at $122B.

Other OpenAI rounds

Date	Round	Amount
Oct 2025	Series b	$10.3B	Details →
Mar 2025	Series D	$40B	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 →