Close-up of sign at entrance to Silicon Valley headquarters of outsourcing and freelancing company Upwork, Mountain View, California, May 3, 2019. Activist investor Engine Capital has a roughly 4% stake in freelance marketplace Upwork and is pushing for a shakeup to the company's board. Upwork shares rose more than 3% on the news in pre-market trading Friday. Engine singled out several Upwork directors, including Chairman Thomas Layton and Greg Gretsch, for their lengthy tenures. Meanwhile, none of Upwork's directors have any apparent experience in staffing industry, the activist said.

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Persons: Hayden Brown's, Brown, Arnaud Ajdler, Thomas Layton, Greg Gretsch, Splunk, Gary Steele, Ajdler, Upwork, Fiverr, Upwork didn't Organizations: CNBC Locations: Silicon, View , California