SoftBank Group Corp. reported a sharp turnaround in its latest quarterly earnings, fueled by a massive $4.2 billion valuation gain on its investment in OpenAI. The surge helped lift SoftBank’s Vision Fund (SVF2) back into profitability and underscored CEO Masayoshi Son’s aggressive “AI-first” strategy.
The Japanese conglomerate posted a quarterly net profit of $1.62 billion (¥248.6 billion) for Q3 FY2025, reversing a ¥369 billion loss from the same period a year earlier. At the center of the rebound was OpenAI, the U.S.-based artificial intelligence leader behind ChatGPT, whose rising valuation significantly boosted SoftBank’s portfolio.
SoftBank OpenAI Gain Drives Vision Fund Recovery
SoftBank’s $4.2 billion valuation gain from OpenAI marked one of the most significant single-quarter boosts for the Vision Fund in recent years. The firm now holds an estimated 11% ownership stake in OpenAI as of December 2025, having invested a total of $41 billion into the AI powerhouse to date.
The gain highlights the growing investor confidence in OpenAI as it prepares for a potential $100 billion funding round, a move that could further elevate its global valuation. For U.S. investors, the news reinforces OpenAI’s status as a central player in the AI arms race, competing directly with Anthropic’s Claude and Google’s Gemini platforms.
Masayoshi Son Doubles Down on AI Investment
Masayoshi Son, SoftBank’s founder and CEO, has increasingly positioned the company as a global AI investment engine. The OpenAI gain validates Son’s pivot away from previous tech missteps and toward concentrated, high-conviction AI bets.
To fund its expanding AI exposure, SoftBank strategically liquidated other major assets. The company sold $5.8 billion worth of Nvidia shares and partially exited its stake in T-Mobile US, generating approximately $12.7 billion in liquidity. Those proceeds were redeployed into OpenAI and AI infrastructure initiatives, signaling a deliberate portfolio reshaping.
For U.S. markets, the divestment of Nvidia shares is particularly notable. NVIDIA remains a dominant AI chipmaker, but SoftBank appears confident that direct exposure to OpenAI rather than indirect AI infrastructure offers greater long-term upside.
Arm Holdings and Broader Portfolio Impact
In addition to OpenAI, Arm Holdings, the U.K.-based semiconductor designer majority-owned by SoftBank, also contributed to the improved results. Arm’s AI chip architecture continues to benefit from surging demand across data centers and edge computing, further enhancing the group’s AI-linked asset base.
The combined impact of OpenAI and Arm has strengthened the Vision Fund’s overall performance, restoring investor confidence after years of volatility.
Still, risks remain. OpenAI faces intensifying competition from Anthropic and Google, and the AI sector’s rapid capital requirements could pressure valuations if growth expectations falter.
A Turning Point for SoftBank?
For now, the $4.2 billion OpenAI gain stands as a symbolic milestone. It not only delivered immediate profit to SoftBank’s Vision Fund but also reinforced Masayoshi Son’s long-standing thesis that artificial intelligence represents the defining technology shift of the decade.
With a 11% stake in OpenAI and billions more deployed into AI infrastructure, SoftBank is no longer merely an investor in the AI revolution; it is positioning itself as one of its most influential backers.
As OpenAI moves toward its next funding round and deeper integration into U.S. enterprise and consumer markets, SoftBank’s bold bet appears, at least for this quarter, to be paying off.
