Soshnikov was placed on unconditional waivers Sunday for the purpose of contract termination, according to CapFriendly.
Soshnikov was put on waivers Tuesday, Elliotte Friedman of Sportsnet reports.
Soshnikov was a healthy scratch for the seventh straight game Saturday.
Soshnikov has only played two games without registering a point this season.
Soshnikov is likely to make his debut for the Islanders on Thursday versus the Panthers, Gabriela Carroll of NewYorkIslanders.com reports.
Soshnikov inked a one-year, $950,000 contract with the Islanders on Wednesday, Sportsnet's Chris Johnston reports.
Soshnikov inked a two-year contract with KHL club Salavat Yulaev Ufa on Monday.
Soshnikov is a healthy scratch for Friday's game versus the Predators, Lou Korac of NHL.com reports.
Soshnikov (concussion) was taken off non-roster, injured reserve Wednesday.
Soshnikov (concussion) was assigned to AHL San Antonio on Saturday for conditioning purposes, player agent Dan Milstein reports.