SoftBank Stock Hits Record High as ARM and OpenAI Bets Pay Off

TLDR

• SoftBank stock surged nearly 13% on Tuesday, hitting a record intraday high of 8,000 yen
• The stock posted a fourth consecutive session of gains, topping the Nikkei 225
• SMBC Nikko raised its price target to 8,500 yen from 5,200 yen on improved ARM exposure
• SoftBank’s OpenAI position is now worth nearly $80 billion, with roughly $45 billion in gains
• S&P Global revised its outlook on SoftBank to negative in March, citing debt risk and OpenAI competition

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SoftBank Group stock hit a new all-time high on Tuesday, surging nearly 13% intraday to 8,000 yen and leading the Nikkei 225.

SoftBank Group Corp., SFTBY

It was the fourth straight session of gains for the Japanese tech conglomerate, and the move was hard to ignore.

The rally wasn’t sparked by a single event. Two assets are doing the heavy lifting here: Arm Holdings and OpenAI.

SoftBank owns roughly 90% of Arm, the British chip designer whose architecture powers smartphones, servers, and a growing slice of AI computing infrastructure.

That stake has become one of the most direct links SoftBank has to the AI hardware boom.

ARM Drives the Upgrade

SMBC Nikko raised its price target on SoftBank to 8,500 yen from 5,200 yen on Tuesday, pointing to the group’s improved exposure to Arm as the key reason.

From the 8,000 yen intraday peak, that target implies around 6% further upside.

The timing matters too. Nvidia’s blowout quarterly results last week reinforced market confidence that AI chip demand is far from peaking — and Arm sits right in the middle of that trade.

When Nvidia signals demand is strong, the market re-prices the companies tied to the chip supply chain. SoftBank, through Arm, is one of them.

The OpenAI Factor

SoftBank’s other big AI bet is OpenAI. The company’s position in the ChatGPT maker is now valued at nearly $80 billion, with around $45 billion in unrealized gains.

That kind of paper profit changes how investors look at a business.

SoftBank has said its total OpenAI investment could reach $64.6 billion for a 13% stake. CEO Masayoshi Son has made no secret of his intent to keep adding to it.

The March quarter results reflected this — SoftBank posted a strong profit, boosted by the rise in OpenAI’s valuation.

That said, not everyone is comfortable with the exposure. S&P Global revised its outlook on SoftBank to negative in March, flagging the pressure the investment puts on portfolio liquidity and the rising competition OpenAI faces in the AI space.

The market shrugged it off. The stock kept climbing.

Debt concerns around the OpenAI position have come and gone, but the AI thesis has so far proven stickier than the worry.

The key debate now is whether this is a sustained re-rating — the market permanently assigning more value to SoftBank’s AI assets — or a momentum trade that fades once the enthusiasm cools.

What’s clear is that SoftBank’s identity in the market has shifted. It’s no longer just a sprawling tech investment fund with a mixed track record.

At these levels, it’s increasingly being priced as a concentrated AI play.

S&P’s negative outlook and debt concerns around the OpenAI investment remain the most recent caution flags on the stock.