Masayoshi Son is turning SoftBank’s public-market assets into fuel for his OpenAI bet. On September 21, SoftBank launched more than $11 billion of dollar and euro bonds as it prepared for another $10 billion OpenAI installment. The financing follows a broader credit line backed by Arm Holdings plc (NASDAQ:ARM), while SoftBank sold its entire roughly $5.8 billion stake NVIDIA Corporation (NASDAQ:NVDA) in 2025. That contrast makes the capital-allocation message unusually clear: Son is willing to sell Nvidia, but he is still treating Arm as both a strategic asset and a source of collateral.
We recently explored why Nvidia could sell every Arm share while still building Vera around Arm technology, and asked what Nvidia’s sprawling AI portfolio reveals when Intel and CoreWeave become the stress test. Those two capital-allocation puzzles make SoftBank’s decision to sell Nvidia but pledge Arm even more revealing.
Arm is the asset SoftBank wants to keep
Arm Holdings plc (NASDAQ:ARM) sits at the center of SoftBank’s AI thesis because its CPU architecture is spreading from smartphones into cloud servers and agentic workloads. SoftBank’s expanded margin facility can reach about $25 billion against Arm shares, giving the parent liquidity without surrendering control. That is useful while OpenAI absorbs cash, but it also means Arm’s market value has become part of SoftBank’s financing machine. A deep Arm selloff could make that leverage more uncomfortable even if Arm’s own operating business remains healthy.
For illustration purposes only. Photo from Arm Holdings
Institutional positioning has been moving in Arm’s favor. Insider Monkey’s database showed 52 hedge funds with reportable ARM longs in Q2 2026, up from 46 in Q1. Sands Capital disclosed Arm as a new holding during the quarter, arguing that agentic AI should increase CPU demand for orchestration, memory management and tool execution. Short interest was 16.74 million shares as of August 31, about 1.57% of float with 4.4 days to cover, a modest position compared with the size of the equity story.
Selling Nvidia is not the same as turning bearish
NVIDIA Corporation is the easier headline, but the sale looks more like a financing choice than a verdict on GPUs. Nvidia remains the dominant supplier of accelerated compute, while SoftBank needs cash for a private-company commitment that cannot be funded simply by marking Arm higher. The risk for Nvidia is more strategic: if OpenAI and SoftBank increasingly finance alternative chips, data centers and vertical AI infrastructure, some future spending can migrate away from merchant GPUs.
Hedge funds were still adding Nvidia into quarter end. Insider Monkey counted 285 holders in Q2, up from 275 in Q1, and Fisher Asset Management increased its 90.9 million-share position about 3%. The filings predate SoftBank’s sale. The cleaner conclusion is that Son has created a hierarchy inside his AI portfolio. OpenAI is the cash sink he wants to fund, Arm is the strategic asset he wants to retain, and Nvidia was liquid enough to sell. For Arm shareholders, that raises collateral risk. For Nvidia shareholders, it is a reminder that even a great asset can be the first thing sold when an owner has a more capital-hungry priority.
