Masayoshi Son’s strategy to leverage SoftBank’s stake in OpenAI to fuel further AI expansion is facing pushback. While the “Stargate” project and SoftBank’s $40 billion bridge loan underscore its massive commitment to AI infrastructure, banks are proving more cautious when it comes to using unlisted, hyper-growth startups as collateral.
1. The Valuation Dilemma: Private vs. Public Transparency The primary reason for the downsized target—from $10B down to $6B—is the difficulty of assigning a fixed “fair market value” to OpenAI.
- The “Unlisted” Discount: Unlike public stocks with daily price discovery, OpenAI’s valuation is based on private funding rounds. Creditors are wary of “over-leveraging” against a valuation that could shift significantly before a public listing.
- Margin Risk: In a margin loan, if the value of the collateral (OpenAI stake) drops, SoftBank would be forced to provide more cash or sell assets to cover the “margin call.” Bankers are currently pricing in a significant safety buffer.
2. The Leverage Play: Stargate and Beyond SoftBank isn’t just holding OpenAI shares; it is building an ecosystem.
- Project Stargate: A massive U.S. AI infrastructure joint venture between SoftBank and OpenAI launched in January 2025.
- The Bridge Loan: SoftBank already secured a $40 billion bridge loan in March to fund infrastructure and general investments. This new margin loan was intended to provide a secondary, more surgical layer of liquidity specifically backed by its OpenAI equity.
3. Strategic Context: SoftBank’s 2026 AI Offensive Despite the downsizing of this specific loan, SoftBank remains the most aggressive institutional player in the AI race.
- Timeline: SoftBank has been an investor in OpenAI since late 2024.
- Infrastructure Focus: The shift from simply “owning software” to “building the hardware/power grid” (via Stargate) suggests SoftBank is moving up the value chain.
- Tenure: The proposed loan carries a two-year term with a one-year extension option, providing a three-year window for OpenAI to potentially execute an IPO.
4. The Creditor Perspective Lenders are currently prioritizing liquidity and risk-adjusted returns. While they want exposure to the OpenAI growth story, they are demanding a more conservative Loan-to-Value (LTV) ratio. Revising the target to $6 billion allows SoftBank to maintain the facility while satisfying bank risk-compliance committees.
The Investor Takeaway: The downsizing of the loan isn’t a signal of “lack of faith” in OpenAI, but rather a “Normalization of AI Finance.” The era of blank-check leverage for private AI firms is ending, replaced by more disciplined, bank-led scrutiny. For SoftBank, $6 billion still provides significant “dry powder” to continue its infrastructure build-out, but it signals that even the most powerful tech investors must now navigate a more disciplined credit market in 2026.