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United Kingdom
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Key definition
ARM definition

What does ARM mean? ARM (availability, Reliability, Maintainability) describes the performance characteristics that safety‑critical plant and systems are expected to achieve in practice, and which legal documents and safety cases commonly specify and measure. It is not defined by statute or case law; it is a widely used engineering and regulatory expression adopted across sectors (notably nuclear, energy and transport) in England & Wales, Scotland, Northern Ireland and Ireland. In the nuclear context, ARM targets help underpin the safety case by evidencing that key systems will be available when required, sufficiently reliable (e.g., probability of success on demand), and maintainable within set...

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NVIDIA/Arm merger (UK): CMA phase 1 SLC concerns; phase 2 reference on competition and national security; investigation cancelled after transaction abandoned (archived case hub)

Practice notes
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CASE HUB ARCHIVED

This archived hub sets out the position as at 8 February 2022, the date the investigation was cancelled following the Transaction being Abandoned; it is no longer maintained. See the timeline and commentary.

Case facts

Outline: UK merger review concerning the completed anticipated acquisition by NVIDIA Corporation of ARM Limited’s Intellectual Property Group business.

Latest developments

On 8 February 2022, the CMA cancelled its phase 2 investigation after NVIDIA decided to abandon the merger.

Parties

  • NVIDIA Corporation (NVIDIA) – a US-based provider of semiconductors and computing platforms serving a wide range of applications; through Mellanox it also supplies network interconnect products, including SmartNICs; listed on NASDAQ.
  • Arm Limited (Arm) – a UK-based company that develops and licences semiconductor IP built on a particular ISA to semiconductor suppliers worldwide.

Background

On 13 September 2020, NVIDIA agreed to acquire Arm’s Intellectual Property Group for US$40bn. On 19 April 2021, the DCMS publicised a Public Interest Intervention Notice (PIIN) issued by the Secretary of State under section 42(2) of the Enterprise Act 2002...

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Web page updated on 28/05/2026

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