SoftBank’s rapid ascent to Japan’s most valuable company, fueled by a 70% share surge on AI enthusiasm, is shadowed by significant debt and liquidity concerns. Analysts warn that its highly leveraged bets, particularly a substantial investment in OpenAI, could lead to a liquidity crunch if AI valuations cool or if OpenAI’s anticipated IPO disappoints. Despite these risks, some investors argue SoftBank’s robust asset base adequately covers its debt, while CEO Masayoshi Son remains steadfast in his aggressive AI strategy, viewing potential market corrections as prime investment opportunities.
SoftBank, once reeling from the monumental failure of its WeWork investment, has staged a remarkable comeback, surging to become Japan’s most valuable company. This dramatic rise, propelled by investor fervor for artificial intelligence, including its strategic stake in chip designer Arm Holdings and anticipation around a potential OpenAI initial public offering, has seen its shares skyrocket by approximately 70% this year. The conglomerate even surpassed automotive giant Toyota in market capitalization recently, signaling a significant shift in Japan's corporate landscape.
However, this bullish ascent is increasingly scrutinized by analysts who warn that the market's renewed optimism may be masking perilous balance-sheet vulnerabilities. SoftBank, under the leadership of its visionary founder Masayoshi Son, has essentially transformed itself into a highly leveraged wager on the future of AI.
“SoftBank has made itself into a highly leveraged bet on AI which carries significant upside as well as risk,” commented Gil Luria, head of technology research at Davidson equity capital markets. This strategy echoes past concentrated bets, like the more than $14 billion in cumulative losses sustained from WeWork, raising alarms among market observers.
The company’s deepening commitment to OpenAI is a focal point of these concerns. SoftBank participated in OpenAI’s funding round last year at a reported $300 billion valuation and further secured a substantial $40 billion bridge loan in March, intended to fuel additional OpenAI investments and support general corporate objectives. As of the close of 2025, SoftBank’s stand-alone interest-bearing debt stood at approximately 16.3 trillion yen (around $104 billion).
S&P Global Ratings, in a notable move this March, revised SoftBank’s credit outlook to negative. The agency projected that OpenAI could account for roughly 30% of SoftBank's investment portfolio, mirroring Arm Holdings’ share, following an estimated $30 billion additional investment in the ChatGPT maker. S&P Global warned that the company's asset liquidity, portfolio quality, and financial capacity are “likely to deteriorate because of its additional huge investment in OpenAI.”
A primary concern among investors revolves around SoftBank’s over-reliance on a single entity, OpenAI. Richard Windsor, founder of equity research firm Radio Free Mobile, articulated this apprehension: “If OpenAI fails to deliver there could easily be a liquidity crunch at SoftBank.” The stakes are particularly high given OpenAI’s staggering $852 billion valuation following a record $122 billion funding round in March.
“If OpenAI does not successfully IPO at the current valuation or better, that could create some pressure on SoftBank given the size of the exposure,” Luria added. Jay R. Ritter, emeritus professor at the Warrington College of Business, highlighted the double-edged sword of leverage: “Buying SoftBank is partly a leveraged bet on OpenAI. If OpenAI does well, leverage is great. But if OpenAI and other investments do poorly, the leverage will hurt SoftBank.” Ritter also pointed to other underperforming assets within SoftBank’s vast portfolio, such as Coupang and Didi, drawing parallels to the costly lessons learned from WeWork’s eventual bankruptcy filing in 2023.
Despite these mounting warnings, some investors maintain that the risks are manageable. Richard Kaye, a portfolio manager at Comgest, emphasized that SoftBank’s substantial assets comfortably cover its debt obligations, with its loan-to-value ratio remaining below 25%. “Softbank's debt is sustainable because its loan to value ratio, its total borrowings vs. its immediately fungible equity value, is below 25%,” Kaye explained, noting that lenders remain confident in extending financing against SoftBank’s equity holdings. He asserts that an OpenAI disappointment, while a setback, would likely result in a one-off markdown rather than a full-blown liquidity crisis, given SoftBank's sufficient equity holdings to offset such losses.
SoftBank CEO Masayoshi Son, in a recent interview, staunchly defended the company's aggressive pivot into AI, characterizing the technological revolution as “50x bigger” than the dot-com boom. He maintains that any future correction in AI-related stocks would present a prime buying opportunity rather than a systemic threat.
SoftBank did not immediately respond to CNBC’s request for comment regarding these concerns.
