SoftBank Group (Vision Funds + Arm + OpenAI)
Masayoshi Son (founder/chairman/CEO); Vision Funds 1 & 2 are the investment vehicles, with OpenAI held via Vision Fund 2.
SoftBank is the most concentrated AI mega-bet among the corporates: an ~$64.6B cumulative position in OpenAI (~13% ownership) via Vision Fund 2, ownership of ~90% of Arm (the dominant compute-IP licensor), and a new 'AI Computing Segment' bundling Arm, Graphcore and Ampere. It is also financing OpenAI's data-center buildout, taking on loans backed by its Arm stake.
Top holdings
~$64.6B cumulative (~13%) — Held via Vision Fund 2; valuation rose from $157B (Oct 2025) to $852B (March 2026 round co-led by SoftBank). Second-largest external holder behind Microsoft.
~90% owned. Dominant CPU/compute IP licensor; anchor of the new AI Computing Segment. Used as collateral for OpenAI-funding loans.
long (acquired). Arm-based server CPUs; folded into AI Computing Segment.
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Our take
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