Today marks the 10th anniversary of Publicis Groupe’s landmark $3.7 billion acquisition of digital network Sapient, a watershed that gave the French holding company the technology chops to succeed in a marketing world shifting toward digital transformation.

That deal tipped off a surge of monumental acquisitions, mergers and purges in the agency world over the past decade. This timeline chronicles the transactions since then that expanded shops into new categories, reshaped the agency landscape and pushed the industry forward in unexpected ways.

Source: Ad Age research as well as interviews with sources including analysts and consultants. Selected significant deals and organizational changes are shown. This list is not meant to be comprehensive.

For the most optimal experience, the timeline is best viewed on a computer rather than a phone.