HMKM was established in 1990 and works for clients including Nike, Selfridges and Galeries Lafayette.
The consultancy has its headquarters in London and works for international clients.
HMKM says it will continue to operate under its existing brand following the acquisition, and the leadership team, which includes managing director Alison Cardy and interior design director Christian Papa, will remain with the company.
Jez Frampton, global chief executive of Interbrand, says, ‘We have an existing group of people retail-wise – this move significantly turbo-charges our offering.
‘HMKM’s expertise in delivering holistic retail concepts, combined with Interbrand’s creative and strategic thinking, will bring tremendous value to our clients.’
HMKM says the move will help them expand their global profile. HMKM’s Papa says, ‘We have an international reach at the moment, and with Interbrand we will be looking to expand that.’