Jana Companions LLC owns an enormous stake in Zendesk Inc. and is urging the customer-service platform to desert a deal it struck to purchase the father or mother of web-survey firm SurveyMonkey .
The New York activist urged Zendesk’s board to terminate the acquisition of Momentive World Inc. now relatively than wait months for a shareholder vote that seems prone to fail, based on a letter despatched Tuesday that was seen by The Wall Road Journal.