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SoftBank
SoftBank is a Japanese investment giant that evolved from a software distributor, then a telecommunications company, into one of the largest financial supporters of artificial intelligence: a major investor in OpenAI and majority owner of Arm.
In plain terms
The name SoftBank is misleading: it is not a bank, and today it is not really a software company either. It is a Tokyo-based corporate group that invests money in other companies, mainly those it believes are building future technology.
Imagine it as a very wealthy and very bold silent partner standing behind a painter. They do not paint the picture; they pay for the studio, the canvas, and the paint, and in return, a share of the picture belongs to them. In AI, the 'studio' is the data center, the 'paint' is the chip and electricity, and the 'painter' is, for example, OpenAI.
Unlike a typical investor, it is built on the visions of a single person, its founder Masayoshi Son, and it plays for extremely high stakes. That is why it has been the protagonist of both a legendary success (Alibaba, Arm) and a legendary failure (WeWork).
How it works
- The corporate group raises money: from its own profits, loans, bonds, and external partners, such as Middle Eastern state funds.
- It invests this money partly through its giant Vision Fund and partly directly into technology companies, receiving equity stakes in return.
- Retains a few key companies permanently. This includes Arm, whose chip designs underpin the vast majority of the world's smartphones and are becoming increasingly important for AI chips.
- In AI, it aims to cover the entire chain: chip design, data centers, energy, and the model developers themselves, such as OpenAI.
- If company values rise, SoftBank profits from selling shares or taking them public, and uses this to finance the next big bet.
An everyday example
You read in the news that OpenAI received tens of billions of dollars in capital, or that huge data centers are being built in the United States as part of the Stargate program. SoftBank's money is behind both news items. The processor in the phone in your pocket is almost certainly based on designs by Arm, in which SoftBank holds a majority stake.
Who is affected
A common misconception
Limits and risks
- Announced amounts often represent intentions spanning several years, not money already paid out, so large figures should be read with caution.
- The company operates with significant debt and its assets are concentrated in a few large bets, so a slowdown in the AI market could cause major losses.
- It has already made spectacular mistakes, such as with WeWork, so the fact that SoftBank invests in something does not mean that the company will be successful.
- Decisions are strongly tied to a single person, the founder, which makes the company fast but unpredictable.
Similar, but not the same
- OpenAI – OpenAI develops ChatGPT and the models; SoftBank is only one of its largest financial supporters and shareholders.
- Vision Fund – The Vision Fund is one of SoftBank's investment funds, meaning it is part of the corporate group, not the company itself.
- Nvidia – Nvidia designs and sells its own AI chips. SoftBank, however, is primarily an investor: its chip-related interests are mainly in Arm, and to a lesser extent through ownership of Ampere, acquired in 2025.
Related concepts
A brief history
SoftBank was founded by Masayoshi Son in 1981 in Tokyo, originally as a software distribution company. In 2000, it became an early investor in the Chinese Alibaba, and in 2006, it became a mobile service provider by acquiring the Japanese division of Vodafone. In 2016, it acquired the British chip designer Arm, and in 2017, it launched the Vision Fund. In January 2025, it jointly announced the Stargate data center program with OpenAI and Oracle.
Where things stand
At the end of 2026, SoftBank is one of the largest financiers of AI infrastructure: a significant shareholder in OpenAI, majority owner of Arm and a key player in the Stargate program. Analysts meanwhile debate whether these huge, partly debt-funded bets will ever pay off.
In the news
- PJM to study SoftBank's Ohio AI project, starting at 800 MWOct 12, 2026 · Ipar
- SoftBank seeks $100 billion from Gulf states for AIOct 6, 2026 · Agent Age
- OpenAI reportedly seeks $30 billion at a $1.4 trillion valuation as SoftBank completes its stakeSep 29, 2026 · Agent Age
- Financing risks of AI investment fuel growing financial scepticismSep 21, 2026 · Agent Age
- Oracle's Project Jupiter loans fall below 90 cents as SoftBank launches $10 billion-plus bond sale for OpenAI stakeSep 21, 2026 · Money
- AI and chip stocks fall after slowdown calls; SoftBank plungesSep 14, 2026 · Agent Age
- SoftBank plans $6.3 billion retail bond sale to fund OpenAI investmentAug 24, 2026 · Agent Age
- Nvidia backs 4.25 GW of OpenAI capacity at Ohio's Ports-Pike campusAug 17, 2026 · Ipar
Also known as
SoftBank · SoftBank Group · SoftBank Group Corp. · Softbank · SBG · SoftBank-csoport · SoftBank Vision Fund
Sources
This entry was machine-edited and has undergone machine expert review; the “In the news” section updates automatically from Agent Age stories.