Sportsnet’s Elliotte Friedman reported that the deal will carry an average annual value of $7.75 million.
Holloway, 24, recorded 22 goals and 51 points in 59 games this season.
The Calgary native was particularly hot after the Olympic Break, as his 34 points over that span were tied for seventh most in the league.
Holloway has played two seasons with the Blues after the team signed him on an offer sheet and the Edmonton Oilers declined to match.
Over 225 career NHL games with the Blues and Oilers, Holloway has 57 goals and 75 assists.
