Nvidia Corp will buy UK-based chip designer Arm from Japan’s SoftBank Group Corp for as much as $40 billion, the companies said on Monday, in a deal set to reshape the global semiconductor sector.

The sale puts a vital supplier to Apple and others across the industry under the control of a single player and faces likely pushback from regulators and rivals to Nvidia, the biggest US chip company by market capitalisation.

Within hours of the announcement, critics questioned how Arm would maintain its open approach under US ownership and at a time of friction with China. Nvidia CEO Jensen Huang emphasised that Arm would retain its neutral licensing model and expand it by licensing out Nvidia intellectual property for the first time.

“We want to grow Arm and make it become even greater,” he told analysts on a conference call.

For Softbank, the sale marks an early exit from Arm, which it acquired for $32 billion. Chief Executive Masayoshi Son has lionised the potential of Arm but is slashing his stakes in major assets to raise cash.

The move comes as SoftBank executives, frustrated at the group’s share performance, have held early stage talks about taking the Japanese technology group private, a source told Reuters.

Those talks could gain momentum following the Arm sale. SoftBank’s shares soared 10 per cent in Tokyo.

Nvidia will pay SoftBank $21.5 billion in shares and $12 billion in cash, including $2 billion on signing.

The deal will see SoftBank and its $100 billion Vision Fund, which has a 25 per cent stake in Arm, take a stake in Nvidia of between 6.7 per cent and 8.1 per cent.

Nvidia will license its flagship graphical processor unit through Arm’s network of silicon partners. It will build chips for devices like self-driving cars but also make its technology available for others.

Taiwan-born Huang has promised to site a new artificial intelligence research centre - equipped with its own supercomputer - at Arm’s base in the university city of Cambridge and said the company was ready to talk to the British government about expanding Arm’s research efforts. He stopped short of offering fresh job guarantees, however.

Arm does not make chips but has created an instruction set architecture — the most fundamental intellectual property that underpins computing chips — on which it bases designs for computing cores.

Arm licenses its chip designs and technology to customers like Qualcomm Inc, Apple and Samsung Electronics Co Ltd. Apple’s forthcoming Mac computers will use Arm-based chips.  Arm will not become subject to US export controls under the deal, said Huang.

The purchase, which is subject to regulatory approvals including in Britain, the United States and China, is likely to come under close scrutiny in China, where thousands of companies from Huawei to small startups use Arm technology.

Nvidia will take control of the minority stake in joint venture Arm China. Arm is in dispute with the venture, which licenses chip architecture to local companies, over its management.

Reuters