The technology investment group has returned to making the aggressive investments that made Son's name and fortune, such as an early bet on Alibaba, but at times spectacularly backfired, like failed shared office provider WeWork. SoftBank's mammoth investments related to artificial intelligence in 2025 include acquiring U.S. semiconductor design company Ampere for $6.5 billion and the underwriting of up to $40 billion of new investment in ChatGPT maker OpenAI.