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Arnold & Porter Advises Microsoft on Next Chapter of OpenAI Partnership

October 31, 2025

Arnold & Porter represented Microsoft Corporation in connection with the recapitalization of OpenAI into a public benefit corporation. Following the recapitalization, which closed on October 28, Microsoft holds an investment in OpenAI Group PBC valued at approximately $135 billion.

The Arnold & Porter team was led by partner Annette Becker, and included partners Laurie Abramowitz and Stephanie Coutu, and senior associate Eric An.