SoftBank Group (SFTBY) Stock Soars 32% in 48 Hours Amid AI Boom and OpenAI IPO Buzz

Key Takeaways

• SoftBank shares climbed as much as 14% on Friday, following a nearly 20% spike the previous day, for a combined two-day advance of approximately 32%
• Nvidia’s blockbuster quarterly revenue of $81.6 billion, representing an 85% year-over-year increase, ignited renewed excitement across AI-related equities
• Arm Holdings, a SoftBank subsidiary, soared over 16% on Friday, amplifying SoftBank’s estimated net asset value
• Reports emerged that OpenAI may submit a confidential IPO filing in the United States imminently, with Goldman Sachs and Morgan Stanley serving as underwriters
• SoftBank disclosed a record annual net profit of ¥5 trillion for the fiscal year ending in March, including $45 billion in cumulative gains from its OpenAI position

SoftBank Group shares reached 6,881 yen during Friday trading, marking a single-day increase of up to 14% and approaching the stock’s all-time peak of 6,923.8 yen. This followed Thursday’s explosive rally of nearly 20%, which added approximately $35 billion to the company’s market capitalization in one trading session.

SoftBank Group Corp., SFTBY

The combined 32% surge over just two days has captured widespread market attention, with market participants and research analysts now debating whether this movement represents genuine value discovery or a speculative AI-momentum trade.

A convergence of three major catalysts triggered the explosive rally. Nvidia unveiled quarterly revenues totaling $81.6 billion, reflecting an 85% year-over-year expansion, which strengthened conviction that AI infrastructure investments continue accelerating. This development sent positive shockwaves through every company connected to artificial intelligence infrastructure.

SoftBank occupies a strategic position within this thematic trade. Via its controlling stake in Arm Holdings and substantial investment in OpenAI, the conglomerate represents one of the most accessible publicly-traded vehicles for gaining exposure to the AI revolution.

Arm Holdings shares exploded higher by more than 16% on Friday. Given SoftBank’s significant ownership stake in the semiconductor design company, any substantial movement in Arm’s stock price directly influences how market participants assess SoftBank’s consolidated asset portfolio.

OpenAI IPO Speculation Intensifies Rally

The third and arguably most significant catalyst involved reports that OpenAI is allegedly preparing to file confidentially for a United States initial public offering, potentially as early as Friday. Goldman Sachs and Morgan Stanley are reportedly handling the transaction.

Andrew Jackson from Ortus Advisors characterized the IPO possibility as the unifying thread of the rally — a singular development enabling investors to weave together Nvidia’s robust demand indicators, Arm’s soaring valuation, and SoftBank’s private artificial intelligence holdings into a coherent investment narrative.

SoftBank recently announced its most successful annual financial performance in company history. Net profit for the fiscal year ending March totaled ¥5 trillion, establishing a new record for any Japanese corporation. The cumulative appreciation on its OpenAI investment alone reached $45 billion.

CreditSights, operating under Fitch Ratings, reaffirmed an “outperform” rating on SoftBank’s debt instruments, asserting that the company’s fundamental asset value remained robust despite an increasingly leveraged balance sheet.

Bloomberg Intelligence research analysts observed that prospective public offerings of OpenAI and SoftBank’s energy infrastructure division SB Energy could potentially reduce SoftBank’s substantial holding company discount exceeding 20% to net asset value while unlocking capital for additional investment opportunities.

Skepticism Remains Among Some Market Observers

Not all market participants are embracing the rally with enthusiasm. Vey-Sern Ling at UBP issued a cautionary note that holding company discounts typically persist regardless of underlying portfolio performance. Parent company shareholders frequently fail to realize the complete economic value of subsidiary assets.

SoftBank’s significant leverage, asset-backed financing arrangements, and dependence on private market valuations introduce additional complexity to the investment thesis.

TD Cowen analyst Krish Sankar increased his SoftBank ADR price target from $13 to $20 while maintaining a Hold rating — indicating that even analysts revising their projections upward aren’t necessarily advocating that investors pursue the stock at present price levels.

The SoftBank ADR performance mirrors the identical pattern observed in Tokyo trading, with the security advancing dramatically across both geographical markets throughout the two-day surge.

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