SoftBank Group is returning to debt markets to finance its expanding bet on OpenAI, launching more than $11 billion of bonds as founder Masayoshi Son pushes deeper into artificial intelligence.
The Japanese investment group plans to sell $10 billion of dollar notes alongside €1 billion of euro debt, with most proceeds earmarked for a third $10 billion follow-on payment to OpenAI.
The financing is more than another borrowing spree, as it replaces shorter-term bridge funding with longer-dated debt, giving SoftBank more time for OpenAI’s growth to translate into value while increasing shareholders’ exposure to the costs of leverage materially.
The $11 billion deal buys SoftBank something valuable
The dollar bonds will mature in 3.5, 5.5 and 7.5 years, while the euro notes carry four- and six-year maturities.
Pricing is expected on September 24, with settlement scheduled for September 29, according to the term sheet.
That structure matters because SoftBank has relied on bridge financing to fund its expansion into OpenAI.
Bloomberg Intelligence analyst Kirk Boodry said that issuing bonds “pushes the maturity out by several years”, reducing refinancing urgency.
The benefit is about timing. Longer maturities give OpenAI more room to expand revenue, raise its valuation or reach public markets before SoftBank faces repayment pressure.
But the debt does not disappear. SoftBank’s bonds are rated BB+ by both S&P and Fitch, leaving the group in speculative-grade territory.
Extending maturities may reduce near-term risk, but interest costs and leverage still matter for shareholders.
OpenAI’s growth is what makes the leverage argument work
SoftBank’s willingness to borrow makes more sense if OpenAI continues expanding at its recent pace.
Macquarie analysts Paul Golding and Alex Luthringer, quoted by GuruFocus, said fundraising discussions followed “a meaningful reacceleration in OpenAI’s commercial momentum”.
They pointed to reported annual recurring revenue of around $40 billion, roughly twice the level seen earlier this year.
That is the argument supporting Son’s strategy. If OpenAI keeps growing and private-market valuations rise, the increase in SoftBank’s asset value could exceed the extra financing costs attached to the investment.
The trade-off is that SoftBank is becoming less diversified in investors’ eyes.
The company said in February that completion of its latest $30 billion follow-on investment would take its cumulative OpenAI investment to $64.6 billion and its ownership to about 13%.
That increasingly turns SoftBank shares into a leveraged expression of OpenAI’s commercial success.
SoftBank is exposed to risks it cannot control
That concentration leaves SoftBank exposed to risks it cannot fully control.
The sensitivity was clear on September 14, when SoftBank shares fell more than 10% as leading AI executives backed calls for slower frontier-model development over safety concerns.
Japanese markets are closed for a holiday on Monday, so investors will not get a fresh Tokyo reaction to the bond launch until trading resumes.
Dan Baker of Morningstar told Euronews that the earlier selloff “probably reflects the possibility that AI development may be slowed by regulators” seeking to reduce risks discussed by OpenAI and Anthropic.
Regulation is only one uncertainty. OpenAI still faces infrastructure requirements, intense competition and questions over when a public listing or another liquidity event might occur.
The new bonds give Son more runway, but they cannot dictate OpenAI’s timetable.
If growth slows or valuation expectations weaken, the same leverage that amplifies gains could put greater pressure on SoftBank’s balance sheet and shares.
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