SoftBank Group has reopened negotiations for a $10 billion loan secured against its stake in OpenAI, according to Reuters, which broke the story through reporter Echo Wang. The exclusive report says the Japanese investment giant is in talks with a consortium of lenders for what Reuters and Seeking Alpha describe as a margin loan backed by that holding.

The renewed discussions come after earlier attempts to arrange the financing stalled. According to Reuters, those talks broke down over concerns tied to the arrangement, and SoftBank has now returned to the table with added concessions to win lenders over.

The most notable of those concessions, per Reuters (as summarized by Techmeme), is that SoftBank is offering to guarantee repayment itself if the OpenAI collateral turns out to be insufficient to cover the loan. In other words, the company would step in to make lenders whole rather than leaving them exposed to swings in the value of its OpenAI position.

Some outlets framed the move as an escalation of SoftBank's commitment: Mobile World Live characterized it as SoftBank adding "the next $10B" to its OpenAI investment, underscoring how central the AI company has become to SoftBank's strategy.

The details reported so far rest on unnamed sources, and Reuters presents the talks as ongoing rather than closed. No lender names, final terms, or completion date were disclosed in the source items.

Why it matters: borrowing $10 billion against a single, privately held stake — and personally guaranteeing the shortfall — shows how much financial weight SoftBank is willing to put behind OpenAI, and how the fortunes of one of the world's most closely watched AI companies are becoming entangled with the balance sheet of a major global investor.