ARM Holdings plc (LSE: ARM, NASDAQ: ARMH) is a British technology company headquartered in Cambridge, England, UK. The company is best known for its processors, although it also designs, licenses and sells software development tools under the RealView and KEIL brands, systems and platforms, system-on-a-chip infrastructure and software. It is probably the best-known of the Silicon Fen companies. The company was founded as a joint venture between Acorn Computers, Apple Computer (now Apple Inc.) and VLSI Technology (as Advanced RISC Machines), intended to further the development of the Acorn RISC Machine's RISC chip, which was originally used in the Acorn Archimedes and is now the processing core for many custom application-specific integrated circuits (ASICs).

The company is considered to be market dominant in the field of mobile phone chips.

The Company was founded in November 1990 as Advanced RISC Machines Ltd and structured as a joint venture between Acorn Computers, Apple Computer (now Apple Inc.) and VLSI Technology. Its first profitable year was 1993.

Source: Wikipedia