Microsoft
OpenAI's largest backer and an active strategic investor across AI.
Investing activity
Microsoft appears in 5 AI deals tracked by the AI Lounge deals desk, rounds totalling $124B. The rounds are mostly Growth, Series D and Seed, with a median round size of $675M and the largest at $122B. The most recent are Micro1 (Growth, $100M, Sep 2026), OpenAI (Growth, $122B, Feb 2026) and Wayve (Series D, $1.26B, Feb 2026).
Microsoft most often invests alongside Nvidia, Amazon, 1X and SoftBank, and the companies it backs on AI Lounge are mostly in AI, AI data / expert labeling and Foundation models.
Deals
Frequently asked questions about Microsoft
What AI companies has Microsoft invested in?
Microsoft's AI investments include Micro1, OpenAI, Wayve, Toyo and Figure AI. The 5 rounds on AI Lounge are listed on this page with amounts, dates and co-investors.
Where is Microsoft based?
Microsoft is based in Redmond, US.
What stage does Microsoft invest at?
In the rounds tracked on AI Lounge, Microsoft has invested at Growth, Series D, Seed and Series B, with a median round of $675M.
Who does Microsoft co-invest with?
Microsoft's most frequent co-investors on AI Lounge are Nvidia (3 deals), Amazon (2 deals), 1X (1 deal), SoftBank (1 deal) and MGX (1 deal).
How can founders reach Microsoft?
Founders on AI Lounge can see Microsoft's contact details in AI Investor Contacts (paid plans), check for a warm introduction through members who worked with the firm under Warm Paths, and add Microsoft to their Investor Pipeline to track the conversation.