SoftBank Group Corp is nearing a deal to buy ARM Holdings Plc for more than $32 billion, people with knowledge of the matter said, securing a slice of virtually every mobile computing gadget on the planet and future connected devices.

The deal discussions started as a result of an approach from SoftBank, and ARM didn't run an auction process, two people said. The deal would be the biggest-ever for SoftBank, which under Chairman Masayoshi Son is one of Japan's most acquisitive companies with stakes in wireless carrier Sprint Corp and Alibaba Group Holding Ltd.

A deal would give SoftBank control of a cash-generating mobile chip leader, and a share of revenue in everything from smartphones to connected gadgets in the home. The British semiconductor designer gets royalties when companies from Apple Inc and Samsung Electronics Co to Qualcomm Inc adopt its designs, which are considered power-saving and efficient.