[1] On 17 May 2018, having gained NHL attention, Lindholm signed as an undrafted free agent to a one-year, entry-level contract with the Toronto Maple Leafs.

[4] Playing as the Maple Leafs fourth-line center, Lindholm recorded his first career NHL goal on 13 October 2018 in a 4–2 win over the Washington Capitals.

[6] On 1 July 2019, Lindholm joined his third NHL club, signing as a free agent to a two-year, $850,000 contract with the Boston Bruins.

[7] In the pandemic delayed 2020–21 season, having featured in just 1 regular season game with the Bruins, while predominantly serving as a healthy scratch, on February 14, 2021, Lindholm was placed on unconditional waivers for the purposes of contract termination by the Bruins after agreeing to a multi-year contract to return to his original Swedish club, Skellefteå AIK.

[8][9] Upon completion of the 2020–21 season with Skellefteå AIK, having collected 6 points through 12 playoff games, Lindholm left the SHL in agreeing to a one-year contract with Russian club Ak Bars Kazan of the Kontinental Hockey League (KHL), on 19 May 2021.