Martin Stuart Sorrell, Chairman at S4 Capital Plc, holds 54.23M shares in S4 Capital Plc (Ticker: GB:SFOR), holds 22.22M shares in WPP (Ticker: GB:WPP). Most recently, Martin Stuart Sorrell Bought ― shares of S4 Capital Plc on Jan 20, 2022 for an estimated value of 52.45K.