The 2015 EU LCS Spring Expansion is a one-time Expansion Tournament to determine the final two teams to make it into the 2015 EU LCS Spring Split. The six remaining teams from the Spring Promotion and the Challenger Series Playoffs face off against seven teams from the Ranked 5's Ladder for the last two spots in the 2015 EU LCS Spring Split.
Top 13 teams from the Ranked 5s Ladder are split into four brackets.
Three teams pre-qualified who dropped from the Promotion Tournament, receiving byes.
Three teams from the Challenger Series Playoffs.
Seven teams from the Ranked 5's Ladders
Top 3 teams each from EUW and EUNE
Winner of Play-in Game between EUW #4 and EUNE #4
A match will be played to determine 5/6th seed from the Challenger Series
There were two waves of qualified teams - the first, teams that participated in Challenger Playoffs and/or the Spring Promotion Tournament. After two of these teams dropped out of the Expansion Tournament, the top five ranked 5's teams from each server: EUW and EUNE were invited; however, not all of these teams participated either. To see a list of teams that participated, see below.