The group is reviewing its agency relationships in the UK, France, Germany and North America.
Three agencies are set to be affected by the review, including three-year incumbent Axicom, which is retained both in the UK and Germany.
Lucy Turpin Communications handles the group's PR in Germany, while The Townsend Agency oversees communications in the US.
ARM global PR manager Michelle Spencer played down suggestions of a formal pitch process, but confirmed all three incumbents are included in the reviews, due to be completed in six to eight weeks' time.
'We are having discussions with various agencies,' said Spencer.
'We are very happy with the agencies we are working with at the moment but we are just doing a routine review - it's something we do every few years,' she added.
It is understood Hill & Knowlton, Fleishman-Hillard and Text 100 are included in the pitch for the UK account.
The briefs under review include day-to-day media relations, alongside corporate and technical PR.
Agencies are also employed in Japan, Korea, Taiwan and China, including Weber Shandwick, and Incomm PR in Korea.