Softbank-backed Arm is reportedly targeting a $60B-$70B September IPO - one of the biggest in tech history. The company licenses out chip designing to tech giants including Apple, Amazon, Microsoft, Nvidia, and Intel. Softbank founder Masa Son couldn't have timed it better as the need for computing power and AI chips booms. But there are still risks, including a slowdown in smartphone sales, and faces competition from an open source chip design architecture firm called RISC-V.