Shares in Entain PLC (LSE:ENT), the owner of Ladbrokes, Coral and US joint venture Bet MGM, spiked on reports that it faces growing investor unrest from activist investors. Following the shares recently sinking to a three-year low below 840p, two more US activist hedge funds have voiced concern over the gambling group's languishing share price and the ability of chief executive Jette Nygaard-Andersen to revive the FTSE 100 company's performance. New York-based funds Sachem Head Capital Management and Dendur Capital have built positions in Entain, according to several sources cited in a Financial Times report. They join Eminence Capital, a Wall Street activist that also owns a 2.1% stake and went public with its grievances in June.