Exhibit 4

24 June 2016

WPP plc (“WPP”)

Purchase of Own Securities

WPP announces that on 24 June 2016 it purchased 400,000 of its ordinary shares at a price of 1514.7982 pence per ordinary share. All of these shares will be held as treasury shares.

Following the above purchase, WPP holds 43,249,124 ordinary shares as treasury shares. The total number of WPP shares in issue is 1,286,783,603 (excluding shares to be held in treasury).