Oleksiak, 24, carries an average annual value of $965,000. He will be a restricted free agent at the end of the season.
Oleksiak, a 6-foot-7, 255-pound blueliner, has skated in 21 games this year with the Stars, producing three points (1G-2A). He has played parts of the last six years with Dallas, tallying 22 points (7G-15A) in 140 career games.
A native of Toronto, Ontario, Oleksiak was originally drafted by the Stars in the first round (14th overall) of the 2011 NHL Draft. He has appeared in 171 career American Hockey League games with the Texas Stars, producing 15 goals, 59 assists and 74 points. Oleksiak won an AHL Calder Cup championship with Texas in 2014, and was an AHL All-Star in 2013.
Oleksiak won a bronze medal with Canada at the 2012 World Junior Championship.