SoftBank's AI Ambitions Spark a Dual-Pronged Debt Drive

SoftBank launches massive fundraising across Europe and Japan to finance its aggressive push into AI, including a major stake in OpenAI, drawing rating agency scrutiny.

SoftBank Group is embarking on a historic fundraising spree across two continents to bankroll its aggressive push into artificial intelligence. The Japanese technology investor is simultaneously tapping retail investors at home and preparing its first foray into European bond markets, a clear signal of the immense capital required for its AI bets. This financial maneuvering, however, is drawing increased scrutiny from credit rating agencies concerned about the parent company's growing leverage.

In Europe, the group's telecommunications subsidiary, SoftBank Corp., is preparing its inaugural euro-denominated bond. The unsecured issuance is expected to feature tranches with six and ten-year maturities, with accompanying banks JPMorgan, BNP Paribas, Citigroup, and Mizuho leading the deal. Fitch Ratings has signaled a preliminary rating in the "BBB+" range for these notes, while S&P Global Ratings assigned a solid "BBB" assessment to the subsidiary's planned debt.

Parallel to this move, the parent SoftBank Group in Japan is finalizing terms for a massive 418 billion yen (approximately $2.61 billion) hybrid bond aimed at domestic retail investors. This 35-year instrument, which carries a fixed rate for its first five years before switching to a variable coupon, is designed to refinance existing hybrid debt coming due in June 2026. A key attraction for SoftBank is that rating agencies typically treat half of such hybrid securities as equity, providing a boost to the company's balance sheet structure.

The relentless capital hunt is directly linked to SoftBank's escalating commitment to OpenAI. The group secured a $40 billion bridge loan from a banking consortium in late March, with a significant portion funneled through Vision Fund 2 to the US AI developer. A fresh injection of $30 billion is set to expand SoftBank's existing stake, likely increasing its share from around 11% to approximately 13%. This funding is central to supporting OpenAI's expansive "Stargate" project, aimed at massively accelerating the build-out of AI data centers.

S&P Global Ratings has already responded to the mounting financial pressure, revising its outlook on SoftBank Group to negative in early March. Analysts cited the rising financial exposure to OpenAI and the conglomerate's substantial funding needs as primary reasons, though the long-term issuer credit rating was affirmed at 'BB+'. The full impact of these recent multi-billion dollar loans on net asset value and leverage ratios will become clearer in May when SoftBank releases its official annual results for the past fiscal year.

Beyond financing, founder Masayoshi Son is restructuring operational leadership to advance its AI hardware strategy. René Haas, CEO of the SoftBank-controlled chip designer Arm, is slated to take on an expanded role overseeing semiconductors, AI, and robotics. This move is intended to drive "Project Izanagi," SoftBank's strategic initiative to develop proprietary AI chips.

The company is also securing critical infrastructure for its energy-intensive data center ambitions. A proposed capital alliance with Tokyo Electric Power Company (TEPCO) is aimed at guaranteeing power supply for future AI projects while accessing decarbonized energy sources. The success of the upcoming euro bond will serve as a key test of European investor confidence in this comprehensive strategic overhaul.