SoftBank has multiple sources of capital it could tap, including margin loans, cash on its balance sheet, stakes in listed companies, and corporate bonds or bridge loans, sources said. SoftBank secured a deal to invest in OpenAI at a US$300 billion valuation in April. A major pool of capital for SoftBank is its undrawn capacity of margin loans borrowed against its ownership of British semiconductor and software design company Arm Holdings. SoftBank recently expanded its margin loan capacity by US$6.5 billion, bringing the total undrawn capacity to US$11.5 billion. SoftBank promised in April to invest up to US$30 billion in OpenAI — US$10 billion of which the start-up would receive the same month.

Source: The Edge Markets December 20, 2025 04:21 UTC