SoftBank Vision Fund Posts $46 Billion Gain on OpenAI Bet

CNBC reported Wednesday that SoftBank’s Vision Fund recorded a $46 billion annual gain, powered almost entirely by a soaring valuation in its cornerstone OpenAI position. The Japanese technology conglomerate has funnelled more than $30 billion into the AI lab, generating roughly $45 billion in investment gains over the fiscal year ended March 2026.

Vision Fund’s OpenAI Concentration Drives the Numbers

The fourth quarter alone produced a $20 billion Vision Fund gain. Nearly all of it came from OpenAI, while holdings including South Korean e-commerce firm Coupang, Chinese ride-hailing giant DiDi Global, and buy-now-pay-later firm Klarna moved against SoftBank during the period. The divergence underscores just how dependent the fund’s performance has become on a single name.

SoftBank CEO Masayoshi Son has made OpenAI the centrepiece of his broader artificial intelligence strategy. The group has pledged more than $60 billion in total to OpenAI, which would secure it approximately 13% ownership of the company. In March, OpenAI closed a funding round co-led by SoftBank that placed the AI lab’s valuation at $852 billion.

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Background: A High-Stakes Pivot Toward AI

SoftBank’s Vision Fund was originally launched in 2017 with nearly $100 billion in capital, targeting tech startups across multiple sectors. Early stumbles, including the WeWork collapse, battered the fund’s reputation. Son subsequently repositioned the group as an AI-first investor. OpenAI CEO Sam Altman and Son appeared together at a Tokyo business event in early 2025, signalling the depth of the partnership. The relationship has since become the defining trade of SoftBank’s current era.

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Debt Concerns Shadow the Gains

The heavy concentration in a single private asset has attracted scrutiny. S&P Global Ratings revised its outlook on SoftBank to “negative” in March, warning that asset liquidity and financial capacity could deteriorate as the OpenAI commitment deepens. The agency noted that asset sales could limit the damage.

SoftBank has acted on that front, trimming stakes in T-Mobile and Nvidia to generate capital. Those disposals and related transactions produced roughly 218 billion yen in gains for the year. Still, stripping out the Vision Fund and currency effects, SoftBank posted an investment loss of more than 472 billion yen from its remaining portfolio. At the group level, a 5 trillion yen net profit for the year was rescued by the Vision Fund and its domestic telecoms arm.

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