| Date/Season | Transaction |
|---|
| 6/27/2020 | Nashville Predators send Alexander Alexeyev, NAS 2027 Rnd 2, $5,000,000 to the Detroit Red Wings for Tomas Malec (rental), FLA 2029 Rnd 3 |
| 10/9/2018 | Philadelphia Flyers send Keith Seabrook, MON 2023 Rnd 1, PHI 2028 Rnd 3 to the Boston Bruins for Tomas Malec (rental), BOS 2023 Rnd 2, $500,000 |
| 3/7/2015 | Pittsburgh Penguins send Tomas Malec to the Boston Bruins for Pierre-Marc Bouchard |
| 11/19/2014 | Pittsburgh Penguins send Michael Rupp, Vojtech Polak to the New York Rangers for Lauri Tukonen, Tomas Malec |
| 8/23/2014 | Calgary Flames send Libor Pivko, Tomas Malec, $2,000,000 to the New York Rangers for Dan Hamhuis, Jonas Brodin, Steve Ott, FLA 2021 Rnd 3 |
| 7/1/2013 | Calgary Flames send Jeff Schultz to the Boston Bruins for Tomas Malec |
| 2/10/2011 | Dallas Stars send Rostislav Klesla, Tomas Malec to the Boston Bruins for Danick Paquette, Robert Nilsson |
| 2006 | Drafted in the 1st round, 13rd overall by Tampa Bay (from Ottawa) |
