The London agency will merge with Deloitte’s existing crisis and resilience operation in what, the companies said, will form one of the largest specialist practices in this field.
The new team, comprised of 70 people and six partners, will operate under the Regester Larkin by Deloitte brand.
Deloitte said the acquisition was in line with its growth agenda and that it focussed on issues that matter to the global firm’s board-level clients.
Andrew Griffin, chief executive of Regester Larkin, said Deloitte was keen to invest in its crisis response and issues management offering.
He added: "This is a hugely exciting opportunity for Regester Larkin and for our clients. We are looking forward to the scope, reach, depth and access to additional expertise that being part of Deloitte will bring."
Rick Cudworth, Deloitte crisis and resilience partner, said: "From day one we will come together under the new Regester Larkin by Deloitte brand. By combining with Regester Larkin’s unrivalled experience and skills in crisis, issues and reputation management we will deepen our ability to support the growing demand of our clients in dealing with strategic risks through a fully integrated crisis management solution."