| Date/Season | Transaction |
|---|
| 4/18/2026 | Ottawa Senators send Jimmy Snuggerud, Duncan Siemens, 2035 OTT Rnd 3 to the Boston Bruins for Jack Rathbone, Aatu Raty, Nathan MacKinnon |
| 3/12/2015 | Ottawa Senators send Marc Staal to the Colorado Avalanche for Duncan Siemens |
| 7/23/2014 | Nashville Predators send Duncan Siemens, Filip Forsberg, Johnny Oduya, Jordan Schmaltz, Scott Laughton, $10,000,000 to the Colorado Avalanche for Anton Babchuk, Lance Bouma |
| 2/13/2012 | Nashville Predators send Ryan Murphy to the Edmonton Oilers for Duncan Siemens, EDM 2017 Rnd 1 |
| 2016 | Drafted in the 1st round, 8th overall by Edmonton |
