Shipachyov signed a two-year, $9 million contract in May, but has yet to suit up for the expansion franchise.
The 30-year-old spent the past four seasons in the KHL with SKA St. Petersburg. He recorded 26 goals and 50 assists in 50 games last season, finishing third in the league in scoring — just four points behind Ilya Kovalchuk. Shipachyov also has two KHL championships on his resume.
Vegas has placed Erik Haula on injured reserve in a corresponding move.
The Golden Knights boast a 3-1-0 record through their first four games.