Career
Holmström was drafted 196th overall by the Detroit Red Wings in the 2014 National Hockey League Entry Draft. Junior
During the 2013-2014 season, Holmström recorded 15 goals and 23 assists in 33 games with Skellefteå AIK"s J20 SuperElit team, as well as skating in four games for Skellefteå AIK. Holmström was ranked 90th by the National Hockey League Central Scouting Bureau on their final list of the top draft-eligible European skaters leading into the 2014 National Hockey League Entry Draft. During the 2014-2015 season, Holmström recorded ten goals and ten assists in 44 games during the regular season.
He was tied for second overall in the SHL among junior-aged players in scoring.
Holmström helped Skellefteå AIK reach the SHL Finals, and led the league in postseason scoring with seven goals and 11 assists in 15 games, breaking the league record for playoff points by a junior player, previous held by Daniel and Henrik Sedin. Professional
On June 15, 2015, the Detroit Red Wings signed Holmström to a three-year entry-level contract.
Holmström represented Sweden at the 2013 Ivan Hlinka Memorial Tournament, where he recorded one assist in four games. He later represented Sweden at the 2014 IIHF World U18 Championships, where he was second-leading scorer during the tournament, recording three goals and eight assists in seven games.
Holmström represented Sweden at the 2015 World Junior Ice Hockey Championships, where he recorded one goal and six assists in seven games.
Holmström again represented Sweden at the 2016 World Junior Ice Hockey Championships, where he recorded one goal and five assists in seven games.