The following is a list of all team-to-team transactions that have occurred in the National Hockey League during the 1969–70 NHL season. It lists what team each player has been traded to, signed by, or claimed by, and for which player(s) or draft pick(s), if applicable.
Trades
May
Trade completed on May 7, 1969.
June
The Montreal Canadiens' first-round pick went to the Minnesota North Stars as the result of a trade where Minnesota promised Montreal that they would not draft Dick Duff in the 1969 intra-league draft.
September
October
November
The Montreal Canadiens' second-round pick went to the Minnesota North Stars as the result of a trade on June 10, 1970 that sent Claude Larose to Montreal in exchange for Bobby Rousseau and this pick.
December
January
February
March
Trade completed on May 14, 1970.
Additional sources
hockeydb.com - search for player and select "show trades"