| Date/Season | Transaction |
|---|
| 1/27/2024 | Albert County Renegade send Hampus Lindholm, S11 ALB 1, S10 ALB 2, S13 ALB 2 to the Saint John Kings for Erik Karlsson, S10, CAI 1 |
| 10/5/2023 | South Esk Scotsmen send Erik Karlsson, Ville Heinola, S10 CAI 1, S10 SOU 1 (conditional) to the Saint John Kings for Moritz Seider, Mark Scheifele, Roman Josi, S11 ALB 2 |
| 5/19/2023 | Riverview Royals send David Pastrnak, Erik Karlsson, Jakob Pelletier, BAT 2 S10 to the Moncton Melons for Nolan Patrick, Rasmus Ristolainen, Philipp Kurashev |
| 9/7/2022 | Riverview Royals send Erik Karlsson (rental) to the Oromocto Senators for Greg Pateryn, S7 ORO 1 |
| 5/27/2021 | Miramichi Moose send S4 MIR 1 to the Riverview Royals for Erik Karlsson (rental) |
| 1 | Drafted in the 1 round, 8 overall by RIV |
