Carolina acquired Edmundson after he won the Stanley Cup with the Blues in the 2019 trade that sent defenseman Justin Faulk to St. Louis. Edmundson is set to become a free agent in October, unless Montreal signs him before then.
The 27-year-old had seven goals and 13 assists in 68 games last season. He dressed for four of the Hurricanes' playoff games.
Carolina recouped the fifth-rounder it sent to the Blues in the Faulk trade. The Hurricanes also still have forward prospect Dominik Bokk and a 2021 seventh-rounder to show for that move.