Alex Formenton (born September 13, 1999) is a Canadian former professional ice hockey left winger who played for the Ottawa Senators and HC Ambrì-Piotta.

[4] At the end of training camp, Ottawa retained him on its NHL roster to open the 2017–18 season and signed him to a three-year entry-level contract.

[5] Formenton made his NHL debut on October 7, 2017, becoming the youngest player to play a game for the contemporary Senators franchise.

Remaining unsigned and later becoming ineligible to appear in the 2022–23 NHL season, Formenton belatedly signed with Swiss club HC Ambrì-Piotta of the National League (NL) on December 14, 2022.

[16] Canadian newspaper The London Free Press noted that it is "ultra-rare" for an NHL team to allow a top prospect like Formenton to be unsigned for an entire season.

In defeating HC Sparta Prague by a 3–2 score, Ambrì became only the fourth Swiss team to win the cup in its 99-year history.

[23] According to August 2024 court documents released the following month, Formenton had "moved on from a hockey career" and was working in construction.

Formenton's early years were spent in the York area, and for the 2015–16 season he played for the Aurora Tigers of the Ontario Junior Hockey League.