| Date/Season | Transaction |
|---|
| 8/1/2018 | Toronto Maple Leafs send David Perron, J.T. Miller, Theo Peckham to the Calgary Flames for Alexei Semenov, Dustin Jeffrey, $1,000,000 |
| 2/6/2016 | Pittsburgh Penguins send Alexei Semenov to the Calgary Flames for Andreas Englund |
| 2/4/2016 | Pittsburgh Penguins send Igor Radulov, $1,500,000 to the New York Rangers for Alexei Semenov |
| 8/8/2013 | Ottawa Senators send Alexei Semenov to the Winnipeg Jets for David Rundblad, Keith Aulie, WPG 2019 Rnd 2, WPG 2023 Rnd 1 |
| 4/22/2010 | Ottawa Senators send Aaron Ness, OTT 2014 Rnd 1, OTT 2017 Rnd 1 to the Nashville Predators for Alexei Semenov |
| 2006 | Drafted in the 1st round, 7th overall by Calgary |
