The following is a list of all team-to-team transactions that have occurred in the National Hockey League during the 2020–21 NHL season.
Players traded or claimed off waivers after this date were not eligible to play in the 2021 Stanley Cup playoffs.
This section is for players who were not previously on contract with NHL teams in the past season.
While Seattle did not begin to play until the 2021–22 NHL season, the team was active and allowed to make trades and sign free agents on April 30, 2021, after sending its final expansion payment to the NHL.
[348] On July 17, the 30 teams excluding Vegas submitted their expansion protection lists and they were published the next day.
[350] Any players picked by Seattle cannot have their contracts bought out by the Kraken until the summer after the 2021–22 season.