| Date/Season | Transaction |
|---|---|
| 1/28/2023 | Detroit Red Wings send Olivier Rodrigue, Sami Niku to the Ottawa Senators for Henrik Karlsson, Alexander Salak |
| 8/20/2022 | Ottawa Senators send Darren Helm, OTT 2031 Rnd 2 to the Colorado Avalanche for Henrik Karlsson |
| 2015 | Drafted in the 2nd round, 57th overall by Colorado (from Calgary) |
