Cairn’s founder and managing director, Damian Beeley, will join Haggie as a partner as part of the deal.
Haggie Partners, which also provides financial and corporate PR services, will integrate Cairn into its operations and Beeley will work with its owners to provide strategic communications advice to new and existing clients.
Beeley said: "I'm extremely pleased to be integrating Cairn into such a well regarded financial PR agency as Haggie Partners. Cairn’s clients will value the considerable resources of Haggie Partners and I am looking forward to working alongside the Haggie team."
Beeley began his career as a Lloyd’s insurance broker before moving into financial journalism in Asia and has previously worked for Pelham Bell Pottinger.
David Haggie said: "We are delighted to welcome Damian and Cairn to Haggie Partners. Damian is a well respected communications professional and is highly valued by clients. He brings with him a wealth of financial communications experience and an extensive understanding of the financial services sector."