SoftBank shares are not meant to move like a meme stock. They just did.
A two-day rally pulled the stock up close to 30%. The catalyst was a pair of IPO reports, and neither one is confirmed yet.
Thursday's session lifted SoftBank close to 20%. The trigger was a report that OpenAI is set to file IPO papers as soon as this week.
The Friday session added another 12%. SB Energy, SoftBank's data center and power arm, had filed its own private IPO papers on Wednesday.
That puts two of SoftBank's biggest bets on track to hit public markets at the same time. For shareholders, an IPO would put a real price on holdings that have lived in private values for years.
SoftBank's stake in OpenAI is now about 11% to 13%. The holding was marked at $54.4 billion in the firm's Q3 2025 earnings.
Against the $34.6 billion SoftBank has put in over time, that is a paper profit of close to $20 billion. It would print on day one if OpenAI lists at the values now floated in the press.
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For six years, SoftBank's stock traded at about a 50% discount to the value of what it owned. Investors did not trust the mix of bets inside the firm.
They had reasons. The list of misses ran from WeWork to the 2022 tech selloff and a Vision Fund that had to write down billions.
That gap is now closing fast. Arm Holdings, the chip maker SoftBank's stake took public in 2023, makes up about 40% of SoftBank's net asset value on its own.
Add the OpenAI stake and the SB Energy push. Now the firm looks less like a hedge fund and more like a holding firm for the AI buildout itself.
The same logic shows up in other deals on Son's watch. That includes the token push tied to OpenAI's startup network.
Investors who used to buy SoftBank for the discount are now buying it for what is inside. That is a new kind of stock.
Son's own stake has done what the firm's stock has done. His wealth is up close to 40% this year to about $50.1 billion.
Per Bloomberg, that puts Son at the number-two spot on Japan's billionaire list. Most of that gain came from this week's rally alone.
The IPOs still need to file, price, and trade. Until they do, this is a rally on reports.
Other big tech names are also lined up. SpaceX is set to test the same public-market window in the weeks ahead.
If those deals price well, SoftBank will look ready for the next leg. If they stall, the discount could come back fast.
For now, the tape is doing the talking. The next print on each IPO is the next big test.
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