UK Regulator Proposes Strategic Market Status for Microsoft Business Software

The U.K. Competition and Markets Authority (CMA) has proposed designating Microsoft’s business software ecosystem with strategic market status, a move that could allow tailored oversight of products used by more than 1 million UK organizations. The proposal, published Oct. 16, is provisional. The CMA is accepting consultation responses until Nov. 13 at noon ET (1700 UTC) and must make a final decision by Feb. 13, 2027. The review covers five areas: personal computer operating systems, productivity software suites, security software, server operating systems and relational database management systems. The CMA provisionally found that Microsoft has substantial and entrenched market power and strategic significance across the ecosystem. Microsoft had more than 1 million organizational customers in the UK in 2025, out of 2.7 million UK businesses.

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