SoftBank Group shares fell sharply on Monday after OpenAI CEO Sam Altman said the artificial intelligence company does not plan to pursue an initial public offering in 2026.
SoftBank Group Corp. (TYO: 9984) dropped more than 11% to around 5,795 yen, making it one of the weakest performers on the Nikkei 225.
The broader Japanese technology sector also came under pressure, while the Nikkei 225 fell around 2%.
OpenAI IPO Hopes Take a Hit
Altman’s comments reduced expectations that OpenAI could enter public markets in the near term.
That development is particularly important for SoftBank because the Japanese investment group has committed more than $60 billion to OpenAI.
SoftBank has also taken on substantial debt to finance its AI investments, including bridge loans backed by some of its other holdings.
A future OpenAI IPO could potentially deliver significant gains for SoftBank by allowing investors to place a public-market valuation on its stake.
Without a near-term listing, however, SoftBank may have to wait longer before realizing a major return from its OpenAI investment.
OpenAI Valuation Remains a Key Factor
OpenAI has attracted extremely high valuations during recent fundraising rounds.
That has increased expectations that a future public offering could become one of the largest technology listings ever.
For SoftBank, a successful IPO could provide a significant boost to the value of its investment portfolio.
The absence of a planned 2026 listing therefore disappointed investors who had hoped SoftBank could unlock some of that value sooner.
AI Development Concerns Pressure Technology Stocks
Investor sentiment was also affected by comments from Anthropic CEO Dario Amodei, who called for a slower pace of artificial intelligence development.
Amodei pointed to potential risks associated with the rapid progress of advanced AI systems.
Other leading figures in the technology industry have also expressed support for greater caution around the development of increasingly powerful AI models.
That broader debate has raised concerns about whether tighter restrictions or a slower development cycle could affect growth expectations across the artificial intelligence sector.
SoftBank Highly Exposed to AI Growth
A slowdown in AI investment or development could have significant consequences for SoftBank.
The company has increasingly positioned itself around artificial intelligence, making OpenAI one of its most important strategic investments.
SoftBank’s exposure also extends beyond OpenAI.
The company owns a major stake in chip designer Arm, which has benefited strongly from rising demand for computing infrastructure linked to artificial intelligence.
Arm Could Also Face Pressure
Arm is widely considered one of the most valuable assets in SoftBank’s portfolio.
Demand for AI-related computing has supported strong interest in semiconductor companies and helped lift valuations across the chip sector.
However, if AI development slows, demand expectations for advanced processors and related infrastructure could also weaken.
That could place pressure on Arm’s valuation and, in turn, reduce the value of one of SoftBank’s most important holdings.
Broader SoftBank Portfolio Could Feel the Impact
SoftBank also holds investments across a wide range of technology companies.
As a result, weaker sentiment toward artificial intelligence could affect more than just OpenAI and Arm.
A broad decline in technology valuations could weigh on the value of SoftBank’s overall investment portfolio.
That sensitivity helps explain why SoftBank shares reacted so strongly to the latest developments.
SoftBank Stock Still Up in 2026
Despite Monday’s sharp decline, SoftBank shares have performed strongly so far this year.
The stock remains up approximately 26% in 2026, reflecting investor optimism around its growing exposure to artificial intelligence.
However, the latest sell-off highlights how closely SoftBank’s valuation is now tied to expectations surrounding AI investment, OpenAI and semiconductor demand.
For investors, future developments involving OpenAI’s IPO plans and the pace of global AI spending are likely to remain key drivers of SoftBank stock.
