Marner tied for top spot with nine goals to go along with league-highs in assists (14) and points (23) as Toronto went 7-4-1.
The 24-year-old had seven multi-point performances, including a career-best four-goal game against the Detroit Red Wings on Saturday.
Markstrom topped the NHL with eight wins in 10 starts, going 8-1-0 with a 2.04 goals-against average, .929 save percentage and one shutout as the Flames rolled to a 10-1-0 record in February.
The 32-year-old allowed two or fewer goals in seven of his 10 appearances, highlighted by a league-leading eighth shutout Feb. 9.
Laine, 23, tied Marner atop the goals race last month with nine of his own, including three game-winners, in 10 outings.