SoftBank sells more than $11B of junk bonds to fund its OpenAI investment
From Sept 21, 2026 SoftBank marketed $10B of dollar and €1B of euro senior unsecured notes (over $11B in total), rated BB+ by Fitch, to fund its $10B share of the third tranche of its OpenAI follow-on investment, due to close Oct 1. At full size it would be the largest non-financial corporate bond deal ever from Asia-Pacific and Japan, and one of the largest junk-bond sales on record.
Key facts
- Size: $10B in dollar notes (3.5-, 5.5- and 7.5-year tenors) plus €1B (4- and 6-year), equivalent to over $11B
- Purpose: SoftBank's $10B contribution to the third tranche of its OpenAI follow-on investment (closing Oct 1, 2026) and general corporate purposes
- Fitch rating: BB+, the highest speculative grade
- Pricing slated for Sept 24, settlement Sept 29; reported pricing included $1B of 3.5-year notes at 8.625% and $4.5B of 5.5-year notes
- Would top 7-Eleven's $10.93B (Jan 2021) as the largest non-financial corporate bond from Asia-Pacific/Japan
- Bloomberg (Sept 28): the deal landed despite investor questions about OpenAI's listing timeline, data-center plans and SB Energy's delayed IPO
What happened
SoftBank turned to the high-yield bond market to pay for its next OpenAI installment, splitting the offering across several dollar and euro maturities. Coverage stressed the high yields SoftBank had to pay and the scale of the deal relative to past Asian corporate issues.
Why it matters
It shows how much of the OpenAI build-out is now debt-financed, and how exposed SoftBank's balance sheet is to OpenAI's fortunes.
Caveat: the final allocated size and all tranche yields were not confirmed from a primary source; figures come from press summaries.
Changelog
- 2026-09-29: created (sweep 2026-09-29)
Related events
- OpenAI closes record $122B funding round at $852B valuation ★★★★
- Sam Altman rules out a 2026 OpenAI IPO, calling it "ill-advised" given AI safety concerns ★★★
Sources (4)
- pressBloomberg: SoftBank seeks over $11 billion in junk bond deal for OpenAI bet
- pressBloomberg: A $2.3 trillion market swayed SoftBank in hunt for more AI debt
- pressThe Japan Times: SoftBank takes on junk-bond debt at record yields to fund OpenAI ambitions
- pressQuartz: SoftBank launches $11 billion junk bond deal for OpenAI bet
id: 2026-09-21-softbank-junk-bond-openai · updated 2026-09-29 · open in the interactive timeline