Tampa Bay Lightning acquire defenseman Ryan McDonagh, forward J.T. Miller from New York Rangers in exchange for forward Vladislav Namestnikov, defenseman Libor Hajek, forward Brett Howden, 2018 first-round pick, 2019 conditional first-round pick.

Vegas Golden Knights acquire forward Tomas Tatar from Detroit Red Wings in exchange for 2018 first-round pick, 2019 second-round pick, 2021 third-round pick.

San Jose Sharks acquire forward Evander Kane from Buffalo Sabres in exchange for 2019 conditional first-round pick, 2019 fourth-round pick, forward Dan O’Regan.

Columbus Blue Jackets acquire forward Thomas Vanek from Vancouver Canucks in exchange for forwards Tyler Motte, Jussi Jokinen.

New Jersey Devils acquire forward Patrick Maroon from Edmonton Oilers in exchange for 2019 third-round pick, forward Joey Dudek.

New York Rangers acquire defenseman Chris Bigras from Colorado Avalanche in exchange for defenseman Ryan Graves.

Nashville Predators acquire forward Tyler Gaudet, defenseman John Ramage from Arizona Coyotes in exchange for defenseman Trevor Murphy, forward Pierre-Cedric Labrie.

Boston Bruins acquire forward Tommy Wingels from Chicago Blackhawks in exchange for 2019 conditional fifth-round pick.

Pittsburgh Penguins acquire forward Josh Jooris from Carolina Hurricanes in exchange for forward Greg McKegg.

Calgary Flames acquire forward Nick Shore from Ottawa Senators in exchange for 2019 seventh-round pick.

Montreal Canadiens acquire defenseman Mike Reilly from Minnesota Wild in exchange for 2019 fifth-round pick.

Winnipeg Jets acquire defenseman Joe Morrow from Montreal Canadiens in exchange for 2018 fourth-round pick.

Anaheim Ducks acquire forward Jason Chimera from New York Islanders in exchange for forward Chris Wagner.

Columbus Blue Jackets acquire forward Ryan Kujawinski from Arizona Coyotes in exchange for forward Jordan Maletta.

Vancouver Canucks acquire forward Brendan Leipsic from Vegas Golden Knights in exchange for defenseman Philip Holm.

Winnipeg Jets acquire forward Paul Stastny from St. Louis Blues in exchange for 2018 first-round pick, rights to forward Erik Foley.

Nashville Predators acquire forward Ryan Hartman, 2018 fifth-round pick from Chicago Blackhawks in exchange for forward Victor Ejdsell, 2018 first-round pick, 2018 fourth-round pick.

Columbus Blue Jackets acquire defenseman Ian Cole from the Ottawa Senators in exchange for forward Nick Moutrey and a third-round pick in the 2020 NHL Draft.

Source: here