SoftBank Group Q3 2025 Results: Inside Masayoshi Son’s AI Pivot

SoftBank’s six-month results mark a decisive shift toward artificial intelligence, as Masayoshi Son reshapes the Vision Fund around OpenAI, Arm, and advanced automation.

Key Takeaways

• SoftBank reports net income of ¥2.9 trillion for the six months ended September 30, up 186% year over year, driven by gains from Vision Fund investments and Arm’s performance.

• Vision Fund 2 posts ¥1.9 trillion in investment gains after several loss-making years, with OpenAI now representing about 19% of total portfolio value and ¥2.1 trillion in unrealized profit.

• Arm’s revenue rises 17% to ¥320 billion, while segment income surges more than fivefold, underscoring the semiconductor unit’s growing role in AI data center and automotive markets.

Introduction

SoftBank Group’s financial results for the six months ending September 30, 2025, demonstrate a strategic repositioning around artificial intelligence that has generated substantial returns. Net income attributable to shareholders reached ¥2,924 billion, up 190.9% year-on-year, driven primarily by unrealized gains in OpenAI and operational growth at Arm Holdings. Income before tax climbed 152.3% to ¥3,686 billion, while net sales rose 7.7% to ¥3,737 billion.

The results mark a departure from the Vision Funds’ earlier performance challenges, when writedowns on companies like WeWork eroded billions in value. Management has concentrated capital in AI infrastructure and applications, particularly through Vision Fund 2’s OpenAI position, now valued at ¥2,751 billion. This focus, combined with Arm’s growing revenue from AI-optimized chip designs, has restored profitability and improved key balance sheet metrics.

Vision Funds Generate Substantial Gains

The SoftBank Vision Funds posted gains on investments of ¥3,415 billion, up 469.5% from the prior period, driving segment income to ¥2,828 billion. Vision Fund 2 contributed ¥1,922 billion in gains, almost entirely from OpenAI holdings that generated ¥2,157 billion in unrealized valuation gains and derivative benefits. Vision Fund 1 added ¥1,359 billion, bringing cumulative gross gains since inception to $32.8 billion. Vision Fund 2 remains loss-making cumulatively at negative $9.1 billion.

SoftBank has committed effectively $30 billion to OpenAI through Vision Fund 2, with board approval for total committed capital across the funds reaching $101.8 billion. The OpenAI stake represents approximately 19% of total Vision Fund investments by value—a concentration level that amplifies both upside potential and exposure to a single company’s performance. Total investments from the Vision Funds stood at ¥14,579 billion as of September 30, up ¥3,168 billion from March.

The strategy shift is evident in investment selection. Rather than broad portfolio expansion, capital has gone to targeted positions in AI infrastructure. The pending acquisition of Ampere Computing for $6.5 billion and ABB’s robotics division for $5.375 billion, both to be consolidated under Robo HD valued at $7.92 billion, extends this approach into hardware and automation.

Arm Delivers Strong Revenue Growth

Arm Holdings generated net sales of ¥320 billion, up 17% year-on-year (22.7% in USD terms), with segment income of ¥24 billion—a 518.4% increase. Royalty revenue rose 22.9% to $1,205 million as chip shipments incorporating Arm architecture accelerated, particularly for AI-optimized data center processors. License revenue increased 22.6% to $983 million, reflecting design wins for next-generation products including the Zena compute subsystem for automotive applications and Lumex for mobile platforms.

Arm’s RISC architecture provides power efficiency advantages for AI workloads, positioning the company to benefit from infrastructure spending by hyperscalers. Amazon’s Graviton, Google’s Axion, and Microsoft’s Cobalt processors all license Arm designs, creating recurring royalty streams. SoftBank retains approximately 90% ownership following Arm’s 2023 IPO, with shares appreciating as semiconductor valuations have repriced for AI demand. A $20 billion margin facility secured by Arm shares provides additional liquidity.

Telecomm Provides Stable Cash Flow

The SoftBank segment, encompassing telecommunications and financial services in Japan, generated net sales of ¥3,400 billion (up 7.9%) and segment income of ¥592 billion (up 9.6%). This business provides steady cash generation that supports debt service and funds speculative technology investments. The segment’s performance reflects pricing discipline in mobile services and expansion of PayPay financial products.

With interest-bearing debt at ¥19,193 billion, the telecommunications operations serve as critical collateral and provide earnings stability. Management has not pursued monetization of these assets, recognizing their strategic value for maintaining credit market access.

Portfolio Realignment: Exits and Losses

The Investment Business of Holding Companies segment generated income of ¥354 billion, down 46.7% from the prior period. The company realized a ¥354 billion gain on its Nvidia position, selling the entire stake in October 2025 for $5.83 billion. Management has indicated proceeds will fund direct AI investments rather than maintain public equity exposure.

This gain was offset by unrealized losses on T-Mobile US (¥405 billion) and Alibaba (¥167 billion). SoftBank executed a $9.17 billion partial sale of T-Mobile shares during the period, reducing holdings to approximately 5.7% ownership based on filings showing 63.86 million shares. More significantly, the company has essentially eliminated direct ownership in Alibaba through systematic settlement of prepaid forward contracts completed by September 2025. While residual derivative exposure valued at ¥1,380 billion remains, the strategic exit from Alibaba represents a definitive shift away from Chinese e-commerce.

Additional monetizations included a $2.37 billion settlement with Deutsche Telekom. These sales, combined with the Nvidia exit, demonstrate active portfolio management to fund AI-focused deployments.

Balance Sheet Metrics Improve

Total assets reached ¥49,161 billion, with equity attributable to owners at ¥14,289 billion—an equity ratio of 29.1%, up from 25.7% at fiscal year-end. Net asset value climbed to ¥32.4 trillion, with loan-to-value improving to 17.0%. Cash and equivalents stood at ¥4,981 billion, supported by ¥1,268 billion in net increase during the period.

Financing activities generated ¥1,672 billion, including ¥820 billion in domestic bonds and $2.2 billion in foreign notes, partially funding bridge loans for OpenAI investments. The company’s debt load of ¥19,193 billion requires ongoing refinancing, with costs sensitive to interest rate movements and credit spreads. Bridge facilities supporting OpenAI commitments introduce timing risk if permanent capital structures are delayed.

Strategic Direction and Execution Risks

Masayoshi Son has articulated a vision of an “ASI Era”—artificial superintelligence as the next technology platform—which guides capital allocation. The Ampere and ABB acquisitions, combined with data center partnerships involving OpenAI and Oracle, sketch a vertically integrated AI infrastructure strategy from chip design through applications.

This approach concentrates risk in several areas. OpenAI’s valuation depends on successful commercialization against intensifying competition from Anthropic, Google, and others. Regulatory approval for Ampere faces scrutiny given semiconductor manufacturing’s national security implications. Currency fluctuations—yen appreciation reduced translated earnings during the period—add volatility. The cumulative effect is high exposure to AI adoption timelines and competitive dynamics that remain uncertain.

Market Response and Shareholder Returns

SoftBank shares reached record highs in November 2025 following the results announcement. The ¥2.9 trillion net profit surprised analysts, with OpenAI gains providing most of the upside. The company announced a 4-for-1 share split effective January 2026 and interim dividends of ¥22 per share (post-split). Treasury stock purchases totaled ¥93 billion.

After-hours trading showed modest declines, suggesting some investor caution about sustainability of gains given concentration in mark-to-market valuations. SoftBank historically trades at a discount to net asset value due to its conglomerate structure, but recent pricing reflects premium valuation for AI exposure.

Assessment

The six-month results confirm SoftBank has repositioned its portfolio around artificial intelligence with measurable financial impact. Vision Fund gains, led by OpenAI, and Arm’s operational growth have offset legacy losses and improved balance sheet ratios. However, performance depends heavily on unrealized valuations subject to market conditions and OpenAI’s execution.

The strategic direction is clear: concentrate capital in AI infrastructure, exit non-core positions, and build integrated capabilities from semiconductors to applications. Success requires OpenAI maintaining technological leadership, regulatory approval for pending acquisitions, and continued AI infrastructure spending. These factors remain uncertain, making near-term gains an incomplete indicator of long-term value creation. The company has improved its positioning, but the investment thesis depends on outcomes years away from resolution.