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OpenAI — Equity Stake: 27%

confirmed99% confidence

1 evidence check

Last checked: 3/31/2026

The source text directly and explicitly confirms the claim. The Fortune article from October 28, 2025 states in multiple places that Microsoft received a 27% stake in OpenAI, valued at approximately $135 billion. The date matches the claim's temporal reference (2025-10), and all key figures align: 27% stake, $135B valuation, and the context about the restructuring. The source also mentions the previous 32.5% stake context is consistent with the claim's additional context.

Evidence — 1 source, 1 check

confirmed99%primaryHaiku 4.5 · 3/31/2026
Found: Microsoft has gained a 27% stake in OpenAI as part of the for-profit restructuring completed in October 2025. The stake is worth around $135 billion.

Note: The source text directly and explicitly confirms the claim. The Fortune article from October 28, 2025 states in multiple places that Microsoft received a 27% stake in OpenAI, valued at approximately $135 billion. The date matches the claim's temporal reference (2025-10), and all key figures align: 27% stake, $135B valuation, and the context about the restructuring. The source also mentions the previous 32.5% stake context is consistent with the claim's additional context.

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Record type: fact

Record ID: f_FZb1inTwrQ