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SoftBank seeks over $11 billion in junk bond sale to fund OpenAI investment

SoftBank is preparing to raise more than $11 billion in a multi-currency junk bond offering to finance its ongoing investments in OpenAI, drawing over $20 billion in preliminary investor interest.

SoftBank CEO Masayoshi Son and OpenAI CEO Sam Altman shaking hands on stage in front of SoftBank and OpenAI logos.
Image: @wallstengine

SoftBank is looking to raise the equivalent of more than $11 billion through a junk bond offering, according to Bloomberg reports. The planned debt package includes $10 billion across three maturities in dollar-denominated notes alongside €1 billion in euro-denominated notes, equivalent to roughly $1.1 billion. If completed at this scale, the transaction would be one of the largest single-company junk bond offerings ever conducted.[1][4][6][7]

Proceeds from the offering are intended to replace bridge financing and primarily fund a follow-on $10 billion investment in OpenAI, which is scheduled to close around Oct. 1. The conglomerate led by Masayoshi Son has committed nearly $65 billion to the artificial intelligence firm in total, which would yield an approximate 13% stake upon completion of the upcoming round. SoftBank has already sold roughly $15 billion in notes so far in 2026, making it the biggest junk-rated corporate borrower in bond markets this year.[3][4][5][7]

Early investor demand for the planned sale has exceeded $20 billion, reaching about 1.8 times the initial offering size. The longest dollar tranche has been discussed at yields approaching 10%, which would represent record territory for comparable SoftBank debt. Although demand has proved substantial, SoftBank indicated it currently has no plans to expand the size of the offering.[2]

Key facts

  • SoftBank is seeking to raise more than $11 billion in junk bonds, which would rank among the largest junk bond offerings ever by a single company.
  • The debt offering includes $10 billion in dollar-denominated bonds across three maturities and €1 billion in euro-denominated notes.
  • Proceeds will replace bridge financing and fund SoftBank's next $10 billion investment in OpenAI, which is scheduled to close around Oct. 1.
  • SoftBank has committed nearly $65 billion to OpenAI, which would equate to roughly a 13% stake after the latest investment round closes.
  • SoftBank has sold about $15 billion of notes in 2026, making it the largest junk-rated debt issuer in the bond market so far this year.
  • SoftBank received more than $20 billion in early investor orders, or roughly 1.8 times the initial deal size.
  • Yields on the longest dollar tranche have been discussed near 10%, though SoftBank currently has no plans to increase the total offering size.

Sources · 6 sources

  1. CO

    Cointelegraph@CointelegraphPost on X ·

    🔥 NOW: SoftBank is looking to raise over $11B in one of the largest junk bond deals ever, partly to fund a follow-on investment in OpenAI, per Bloomberg. https://t.co/MIBSo7lwaZ

    Open source
  2. WS

    Wall St Engine@wallstenginePost on X ·

    SOFTBANK DRAWS $20B+ OF EARLY DEMAND FOR $11B JUNK BOND DEAL TO FUND OPENAI BET SoftBank has received more than $20B of preliminary investor interest for its planned $11B+ bond sale, roughly 1.8x the initial deal size. The offering includes $10B in dollar bonds and €1B in euro notes, with proceeds helping fund SoftBank’s nearly $65B commitment to OpenAI. The longest dollar tranche has been discussed at yields approaching 10%, which would be record territory for comparable SoftBank debt. SoftBank says demand is substantial but it currently has no plans to increase the size of the offering.

    Open source
  3. GU

    GURGAVIN@gurgavinPost on X ·

    SOFTBANK PLANS TO BORROW ANOTHER $11 BILLION DOLLARS FROM THE JUNK BOND MARKET TO INVEST MORE MONEY INTO OPEN AI SOFTBANK HAS ALREADY BORROWED $15 BILLION FROM THE JUNK MARKET SO FAR THIS YEAR https://t.co/YNh8JBIGyx

    Open source
  4. WS

    Wall St Engine@wallstenginePost on X ·

    SOFTBANK SEEKS $11B+ JUNK BOND SALE TO FUND OPENAI BET SoftBank is looking to raise more than $11B through bonds as Masayoshi Son continues to aggressively finance the group’s investment in OpenAI. The offering includes $10B of dollar-denominated notes across three maturities and €1B, roughly $1.1B, of euro notes. The proceeds will primarily fund SoftBank’s next $10B investment in OpenAI, scheduled to close around Oct. 1, while also replacing bridge financing. SoftBank has committed nearly $65B to OpenAI in total, which would give it roughly a 13% stake after the latest investment is completed. If completed at this size, the offering would rank among the largest junk-bond sales ever by a single company. Source: Bloomberg

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  5. TK

    The Kobeissi Letter@KobeissiLetterPost on X ·

    BREAKING: SoftBank is set to raise more than $11 billion, in what will be one of the biggest junk bond deals ever, to fund a follow-on investment in OpenAI, per Bloomberg. As part of its funding campaign this year, SoftBank has sold ~$15 billion worth of notes, making it the biggest junk-rated borrower in bond markets so far in 2026. We are seeing unprecedented debt market activity to fund AI.

    Open source
  6. TE

    Techmeme@TechmemePost on X ·

    Sources: SoftBank is looking to issue $10B and €1B in debt for its OpenAI investment, in what would be one of the biggest junk bond sales ever (Bloomberg) (Visit Techmeme dot com for the link and full context!)

    Open source
  7. BL

    Bloomberg@businessPost on X ·

    SoftBank is seeking the equivalent of more than $11 billion in what would be one of the biggest junk bond deals ever, sources say, as billionaire Masayoshi Son’s conglomerate ramps up its investments in ChatGPT creator OpenAI https://t.co/HADc4Vf24J

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