SoftBank Shares Plunge Over 11% After OpenAI Rules Out 2026 IPO

SoftBank Group shares tumbled sharply on Monday in Tokyo after OpenAI CEO Sam Altman confirmed the company will not pursue an initial public offering in 2026, citing AI safety priorities. The stock fell 11.4% to trade near ¥5,797 and touched intraday losses of up to 13%, marking one of its steepest drops in months, as reported by multiple market sources. The decline came alongside broader calls from AI leaders to slow advanced model development and a weaker Nikkei 225.

SoftBank’s $64.6bn OpenAI Stake Hit as Altman Rules Out 2026 IPO; Stock Drops 11–13%

OpenAI CEO Sam Altman stated in a Fortune magazine interview that 2026 is an “ill-advised moment” for the company to go public while it focuses on safety issues. The comments followed Anthropic CEO Dario Amodei’s essay urging the industry to “pace the frontier” and slow advances in the most capable AI models, with both Altman and Elon Musk endorsing a more cautious approach. SoftBank has committed approximately $64.6 billion to OpenAI for an expected stake of around 13%, with further tranches due, including a significant payment scheduled around early October. The Japanese conglomerate recently secured an upsized $11.87 billion loan to support its OpenAI investments and is managing related bridge financing.

SoftBank was among the worst performers on the Nikkei 225, which itself declined about 0.9–1.7% and traded below the 63,000 level at points during the session. Other AI-linked Japanese names also sold off, including memory maker Kioxia, which dropped around 6–7%. Rising oil prices, driven by Saudi Arabia’s shutdown of the East-West pipeline after drone attacks, added to broader market pressure by heightening inflation and rate-hike concerns.

SoftBank Investors Reprice OpenAI Exposure After IPO Delay Removes Key Catalyst

Investors reassessed SoftBank’s concentrated exposure to OpenAI after the removal of a near-term liquidity and valuation event. An IPO had been widely viewed as a potential catalyst that could crystallize gains on SoftBank’s massive stake and ease balance-sheet pressure from related financing. The dual signals of delayed IPO timing and industry-wide calls to slow frontier AI development raised questions about the pace of returns on SoftBank’s AI bets. Credit markets also reflected caution, with SoftBank’s credit default swaps widening. The selloff occurred against a backdrop of higher oil prices and expectations of tighter monetary policy from the Federal Reserve and Bank of Japan.

SoftBank’s $64.6bn OpenAI Bet, $25.9bn Bridge Loan and 30% Share Drop Frame High-Stakes AI Exposure

SoftBank, led by Masayoshi Son, has positioned AI as a core strategic pillar, with OpenAI ranking alongside its majority stake in Arm Holdings as a key holding. The company has financed its OpenAI commitments through a mix of bridge loans (including a large facility of which $25.9 billion was recently earmarked for early repayment), margin loans, and bond issuance. SoftBank’s shares had already declined roughly 30% from their June peak amid earlier speculation about possible IPO delays. The broader AI investment cycle has driven significant capital expenditure across semiconductors and infrastructure, making SoftBank a high-beta proxy for sentiment toward frontier AI progress. Concurrent Middle East supply disruptions that pushed Brent crude above $107 reinforced macroeconomic headwinds for risk assets.

SoftBank Faces OpenAI Funding Tranches, Bridge Debt Refinancing and Central Bank Decisions This Week

Markets will watch for any further clarification from OpenAI on its listing timeline and safety roadmap, as well as SoftBank’s updates on financing and investment pacing. Upcoming central bank decisions from the Federal Reserve, Bank of England and Bank of Japan this week could influence broader risk appetite. Progress on SoftBank’s remaining OpenAI funding tranches, potential refinancing of bridge debt, and any additional AI-related announcements will remain key near-term drivers. Continued volatility in AI-exposed Japanese equities is likely while investors digest the implications of a slower development pace.