| Date/Season | Transaction |
|---|
| 1/23/2023 | Toronto Maple Leafs send Aleksi Heimosalmi to the Carolina Hurricanes for Thomas Hickey (rental) |
| 12/8/2022 | Philadelphia Flyers send Thomas Hickey, PHI 2032 Rnd 3 to the Carolina Hurricanes for Noah Hanifin, CBJ 2032 Rnd 2 |
| 8/27/2021 | Philadelphia Flyers send 2027 WPG Rnd 3, $1,500,000 to the Buffalo Sabres for Thomas Hickey (rental) |
| 7/7/2021 | Vancouver Canucks send Thomas Hickey, Barrett Hayton, TOR 2028 Rnd 3, $2,500,000 to the Buffalo Sabres for Jonathan Dahlen, Adam Larsson |
| 1/1/2021 | Los Angeles Kings send Thomas Hickey, Emile Poirier, COL 2028 Rnd 3 to the Vancouver Canucks for Robert Thomas, Aaron Ness, Cameron York, $1,500,000 |
| 9/10/2020 | New York Rangers send Thomas Hickey to the Los Angeles Kings for WPG 2026 Rnd 2 |
| 9/9/2020 | Pittsburgh Penguins send Sergei Kostitsyn, Anton Babchuk, Thomas Hickey to the New York Rangers for Spencer Watson, Marc Methot, Gabriel Carlsson, MIN 2025 Rnd 1 |
| 5/8/2020 | Los Angeles Kings send Thomas Hickey, Sergei Kostitsyn to the Pittsburgh Penguins for Pierre-Olivier Joseph, Roman Voloshenko, Dmitry Orlov, SJS 2025 Rnd 1, WPG 2027 Rnd 2 |
| 2/27/2015 | Los Angeles Kings send Curtis Lazar to the Philadelphia Flyers for Thomas Hickey |
| 5/14/2012 | Montreal Canadiens send Thomas Hickey to the Philadelphia Flyers for Mike Komisarek |
| 2011 | Drafted in the 1st round, 10th overall by Montreal |
