KEY POINTS
  • The deal, one of the biggest semiconductor takeovers ever, was announced in September to much fanfare, although competition regulators around the world soon announced plans to investigate the acquisition.
  • Probes were launched in the U.S., the U.K., China and Europe after companies like Qualcomm, Microsoft, Google and Huawei complained that the deal was bad for the semiconductor industry.
  • The U.K. is reportedly considering blocking the deal on national security grounds.
Jensen Huang, president and CEO of Nvidia, speaks during the Computex Show in Taipei on May 30, 2017.

LONDON — Nvidia's $40 billion bid to buy U.K.-based chip designer Arm from Japan's SoftBank has started to look increasingly uncertain.

The deal, one of the biggest semiconductor takeovers ever, was announced in September to much fanfare, although competition regulators around the world soon announced plans to investigate the acquisition. Probes were launched in the U.S., the U.K., China and Europe after companies like Qualcomm, Microsoft, Google and Huawei complained that the deal was bad for the semiconductor industry.