Amicus, Davanti, DWA and Gyro are folded into Merkle Australia, while CX consultancy Accordant is integrated with Isobar.
The unit already employs 1,000 people, serves over 100 clients and manages $16 billion in global billings.
Craig Dempster, currently president of Merkle Americas, will take over as global CEO on June 1, as longtime chairman and CEO David Williams changes focus to a group CRM role.
Top managers are in line for further $60m from retention scheme.
The India-based data and analytics company has more than 1,800 staffers worldwide.
Michael Zhang, former chief of ‘Merkle&c’ becomes new CEO of Dentsu X China.
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