SoftBank Launches $11 Billion Bond Sale to Fund OpenAI Investment
The Japanese technology giant is turning to the bond market to finance another $10 billion investment in OpenAI, deepening its financial exposure to the global AI boom.
SoftBank Group has launched more than $11 billion in senior unsecured bonds as it prepares to finance a further $10 billion investment in OpenAI. The offering consists of $10 billion in U.S. dollar-denominated notes and €1 billion in euro-denominated notes. If completed at the planned size, it would become the largest non-financial corporate bond deal ever recorded in Asia Pacific and Japan.
SoftBank is going back to the debt markets to finance its growing commitment to artificial intelligence.
The Japanese technology and investment group has launched a bond offering worth more than $11 billion, with most of the proceeds intended to fund another $10 billion investment in OpenAI, the company behind ChatGPT.
The move highlights just how much capital is now flowing into the AI industry — and how SoftBank is increasingly using borrowed money to maintain its position at the center of that transformation.
A More Than $11 Billion Bond Sale
According to the terms of the offering, SoftBank is selling $10 billion of dollar-denominated senior unsecured notes alongside €1 billion of euro-denominated notes, worth roughly $1.15 billion at current exchange rates.
The dollar bonds are divided into three maturities: three and a half years, five and a half years, and seven and a half years. The euro notes have four-year and six-year maturities.
The bonds are expected to be priced on September 24 and settled on September 29, according to the term sheet.
The Money Is Going Into OpenAI
The primary purpose of the bond sale is to help SoftBank make a $10 billion payment connected to the third tranche of its follow-on investment in OpenAI.
That transaction is expected to close on October 1. The remaining proceeds from the bond offering are intended for general corporate purposes.
SoftBank had previously arranged a $10 billion bridge loan to finance the OpenAI investment. The new bonds are expected to replace that short-term financing with longer-term debt.
SoftBank is effectively converting short-term financing for its OpenAI investment into longer-term bonds sold to investors.
One of Asia's Biggest Corporate Bond Deals
The size of the offering makes it significant beyond SoftBank and OpenAI.
If the transaction is completed at its planned size, it would become the largest non-financial corporate bond deal ever recorded in Asia Pacific and Japan, surpassing the approximately $10.93 billion bond sale by 7-Eleven in January 2021.
It would also rank among the world's largest corporate bond transactions of 2026, showing the extraordinary scale of financing now being directed toward AI-related investments.
SoftBank's Growing OpenAI Exposure
SoftBank's relationship with OpenAI has become one of the largest financial bets in the company's history.
With the latest investment, SoftBank's total planned investment in OpenAI is expected to approach $65 billion. That makes the Japanese group one of the most financially exposed investors to the future growth of OpenAI and the wider AI economy.
The strategy reflects Masayoshi Son's broader view that artificial intelligence could become one of the most important economic transformations of the coming decades.
Debt Is Becoming Part of the AI Race
The SoftBank deal also illustrates a larger development in the technology industry: AI is becoming increasingly capital-intensive.
Building advanced AI systems requires enormous amounts of computing power, specialized chips, data centers, electricity and infrastructure. Companies and investors therefore need access to increasingly large pools of capital to participate in the expansion.
For SoftBank, debt provides a way to finance major investments without relying entirely on existing cash resources. But borrowing also creates obligations that must eventually be serviced, regardless of how quickly an investment generates returns.
The Risk Behind the Strategy
The scale of the financing means SoftBank's future is becoming increasingly connected to the value and growth of its AI investments.
If OpenAI and the broader AI market continue expanding rapidly, SoftBank could benefit from the value created by its holdings. But if AI investment slows, valuations decline or major projects fail to generate expected returns, the company would still face the debt obligations created to finance those investments.
That makes the cost of borrowing, the performance of SoftBank's assets and the future economics of artificial intelligence increasingly important to investors.
Why This Matters for OpenAI
For OpenAI, SoftBank's willingness to raise billions in debt to finance its investment demonstrates the depth of financial support surrounding the company.
OpenAI's expansion requires massive amounts of infrastructure and computing capacity. Investors, cloud providers, chip companies and infrastructure operators are therefore becoming increasingly connected to the company's growth plans.
The financing also shows that the AI race is no longer simply a competition between software companies. It is increasingly a competition involving banks, bond markets, semiconductor manufacturers, energy providers, data centers and major technology investors.
SoftBank's $11 billion bond sale is more than a financing transaction. It is another sign that the AI revolution is becoming a capital-intensive global industry — and that the companies betting most heavily on its future are increasingly tying their fortunes to the cost of making that future possible.
