Symantec Shares Tumble on CEO's Departure, Downbeat Forecast

Symantec Corp. shares tumbled as much as 16% in extended trading after the company said President and Chief Executive Officer Greg Clark is stepping down and leaving the security-software maker’s board.

Richard Hill, a current director and former CEO of Novellus Systems Inc., was named interim leader to replace Clark, who has been at the helm since 2016, the company said Thursday in a statement. Symantec said it will begin the process of finding a permanent successor. The company also named Vincent Pilette as chief financial officer, replacing Nicholas Noviello, whose exit was announced in January.