| | LW | Contract extended (The Ottawa Senators signed F Cole Reinhardt to a one-year, two-way contract extension.) |
| | LW | Contract extended (The Ottawa Senators signed F Angus Crookshank to a one-year, two-way contract extension.) |
| | LW | Sent to minors (The Ottawa Senators sent F Angus Crookshank to the minors.) |
| | LW | Sent to minors (The Ottawa Senators sent F Bokondji Imama to the minors.) |
| | LW | Sent to minors (The Ottawa Senators sent F Zack Ostapchuk to the minors.) |
| | LW | Sent to minors (The Ottawa Senators sent F Jiri Smejkal to the minors.) |
| | LW | Called up from minors (The Ottawa Senators recalled F Zack Ostapchuk from the minors.) |
| | C | Sent to minors (The Ottawa Senators sent F Matthew Highmore to the minors.) |
| | C | Activated (The Ottawa Senators activated F Zack MacEwen from injured reserve.) |
| | LW | Called up from minors (The Ottawa Senators recalled F Bokondji Imama from the minors.) |
| | LW | Called up from minors (The Ottawa Senators recalled F Bokondji Imama from the minors.) |
| | C | Sent to minors (The Ottawa Senators assigned F Rourke Chartier to the minors.) |
| | LW | Called up from minors (The Ottawa Senators recalled F Jiri Smejkal from the minors.) |
| | D | Called up from minors (The Ottawa Senators recalled D Tyler Kleven from the minors.) |
| | LW | Called up from minors (The Ottawa Senators recalled F Angus Crookshank from the minors.) |
| | LW | Sent to minors (The Ottawa Senators re-assigned F Zack Ostapchuk to the minors.) |
| | C | Placed on Injured Reserve (The Ottawa Senators placed F Rourke Chartier on the Injured Reserve.) |
| | D | Sent to minors (The Ottawa Senators sent D Maxence Guénette to the minors.) |
| | LW | Sent to minors (The Ottawa Senators assigned F Jiri Smejkal to the minors.) |
| | C | Placed on Injured Reserve (The Ottawa Senators placed F Zack MacEwen on injured reserve.) |
| | C | Placed on Injured Reserve (The Ottawa Senators placed F Matthew Highmore on injured reserve, per CapFriendly.) |
| | LW | Suspension Over (The Ottawa Senators announced F Parker Kelly served his two-game suspension.) |
| | LW | Called up from minors (The Ottawa Senators recalled F Zack Ostapchuk from the minors.) |
| | LW | Suspended (The NHL suspended Ottawa Senators F Parker Kelly for two games.) |
| | LW | Claimed (The Ottawa Senators claimed F Boris Katchouk off waivers.) |
| | G | Sent to minors (The Ottawa Senators assigned G Mads Sogaard to the minors.) |
| | LW | Called up from minors (The Ottawa Senators recalled F Jiri Smejkal from the minors.) |
| | RW | Traded (The Ottawa Senators traded F Vladimir Tarasenko to the Florida Panthers.) To |
| | C | Called up from minors (The Ottawa Senators recalled F Matthew Highmore from the minors.) |
| | C | Called up from minors (The Ottawa Senators recalled F Rourke Chartier from the minors.) |
| | G | Called up from minors (The Ottawa Senators recalled G Mads Sogaard from the minors.) |
| | C | Called up from minors (The Ottawa Senators recalled F Zack MacEwen from the minors.) |
| | D | Called up from minors (The Ottawa Senators recalled D Maxence Guenette from the minors. ) |
| | G | Called up from minors (The Ottawa Senators recalled G Leevi Merilainen from the minors.) |
| | C | Placed on Injured Reserve (The Ottawa Senators placed F Josh Norris on injured reserve.) |
| | D | Sent to minors (The Ottawa Senators assigned D Max Guenette to the minors.) |
| | D | Called up from minors (The Ottawa Senators recalled D Maxence Guenette.) |
| | G | Sent to minors (The Ottawa Senators assigned G Kevin Mandolese to the minors.) |
| | C | Waived (The Ottawa Senators waived F Zack MacEwen.) |
| | G | Activated (The Ottawa Senators activated G Anton Forsberg.) |
| | D | Sent to minors (The Ottawa Senators sent D Dillon Heatherington to the minors.) |
| | RW | Sent to minors (The Ottawa Senators sent F Oskar Pettersson to the minors.) |
| | G | Called up from minors (The Ottawa Senators recalled G Kevin Mandolese from the minors.) |
| | G | Sent to minors (The Ottawa Senators assigned G Mads Sogaard to the minors.) |
| | C | Waived (The Ottawa Senators waived F Rourke Chartier.) |
| | RW | Called up from minors (The Ottawa Senators recalled F Oskar Pettersson from the minors.) |
| | RW | Called up from minors (The Ottawa Senators recalled F Oskar Pettersson from the minors.) |
| | C | Suspension Over (F Shane Pinto was reinstated from suspension.) |
| | G | Placed on Injured Reserve (The Ottawa Senators placed G Anton Forsberg on long-term injured reserve.) |
| | C | Activated (The Ottawa Senators activated F Rourke Chartier from injured reserve.) |
| | G | Called up from minors (The Ottawa Senators recalled G Mads Sogaard from the minors.) |
| | RW | Activated (The Ottawa Senators activated F Mathieu Joseph.) |
| | LW | Sent to minors (The Ottawa Senators assigned F Jiri Smejkal to the minors.) |
| | LW | Sent to minors (The Ottawa Senators assigned F Angus Crookshank to the minors.) |
| | D | Sent to minors (The Ottawa Senators assigned D Jorian Donovan to the minors.) |
| | D | Called up from minors (The Ottawa Senators recalled D Dillon Heatherington from the minors.) |
| | D | Activated (The Ottawa Senators activated D Thomas Chabot.) |
| | RW | Placed on Injured Reserve (The Ottawa Senators placed F Mathieu Joseph on injured reserve.) |
| | LW | Called up from minors (The Ottawa Senators recalled F Jiri Smejkal from the minors.) |
| | LW | Called up from minors (The Ottawa Senators recalled F Angus Crookshank from the minors.) |
| | LW | Sent to minors (The Ottawa Senators sent F Angus Crookshank to the minors.) |
| | LW | Sent to minors (The Ottawa Senators sent F Jiri Smejkal to the minors.) |
| | D | Sent to minors (The Ottawa Senators assigned D Jacob Larsson to the minors.) |
| | C | Placed on Injured Reserve (The Ottawa Senators placed F Rourke Chartier on Injured Reserve.) |
| | LW | Called up from minors (The Ottawa Senators recalled F Jiri Smejkal from the minors.) |
| | LW | Called up from minors (The Ottawa Senators recalled F Angus Crookshank from the minors.) |
| | C | Activated (The Ottawa Senators activated F Mark Kastelic.) |
| | LW | Sent to minors (The Ottawa Senators assigned F Jiri Smejkal to the minors.) |
| | D | Called up from minors (The Ottawa Senators recalled D Jacob Larsson.) |
| | LW | Called up from minors (The Ottawa Senators recalled F Jiri Smejkal from the minors.) |
| | D | Placed on Injured Reserve (The Ottawa Senators placed D Thomas Chabot on injured reserve.) |
| | C | Activated (The Ottawa Senators activated F Ridly Greig from the Injured Reserve.) |
| | C | Sent to minors (The Ottawa Senators assigned F Matthew Highmore to the minors.) |
| | D | Activated (The Ottawa Senators activated D Thomas Chabot.) |
| | G | Sent to minors (The Ottawa Senators assigned G Mads Sogaard to the minors.) |
| | LW | Sent to minors (The Ottawa Senators assigned F Roby Jarventie to the minors.) |
| | C | Called up from minors (The Ottawa Senators recalled F Matthew Highmore from the minors.) |
| | G | Called up from minors (The Ottawa Senators recalled G Mads Sogaard from the minors.) |
| | D | Sent to minors (The Ottawa Senators assigned D Jacob Larsson to the minors.) |
| | D | Sent to minors (The Ottawa Senators assigned D Tyler Kleven to the minors.) |
| | G | Sent to minors (The Ottawa Senators assigned G Mads Sogaard to the minors.) |
| | C | Sent to minors (The Ottawa Senators assigned F Matthew Highmore to the minors.) |
| | G | Called up from minors (The Ottawa Senators recalled G Mads Sogaard.) |
| | D | Called up from minors (The Ottawa Senators recalled D Jacob Larsson.) |
| | C | Called up from minors (The Ottawa Senators recalled F Matthew Highmore from the minors.) |
| | C | Called up from minors (The Ottawa Senators recalled F Matthew Highmore from the minors.) |
| | C | Placed on Injured Reserve (The Ottawa Senators placed F Ridly Greig on the Injured Reserve.) |
| | D | Sent to minors (The Ottawa Senators assigned D Nikolas Matinpalo to the minors.) |
| | C | Placed on Injured Reserve (The Ottawa Senators placed F Mark Kastelic on the Injured Reserve.) |
| | C | Called up from minors (The Ottawa Senators recalled F Zack MacEwen from the minors.) |
| | LW | Called up from minors (The Ottawa Senators recalled F Roby Jarventie from the minors.) |
| | D | Called up from minors (The Ottawa Senators recalled D Tyler Kleven from the minors.) |
| | D | Placed on Injured Reserve (The Ottawa Senators placed D Thomas Chabot on Injured Reserve.) |
| | D | Called up from minors (The Ottawa Senators recalled D Tyler Kleven from the minors.) |
| | D | Called up from minors (The Ottawa Senators recalled D Nikolas Matinpalo from the minors.) |
| | D | Called up from minors (The Ottawa Senators recalled D Nikolas Matinpalo from the minors.) |
| | C | Suspended (The NHL suspended F Shane Pinto for 41 games.) |
| | D | Called up from minors (The Ottawa Senators recalled D Jacob Bernard-Docker.) |
| | D | Sent to minors (The Ottawa Senators assigned D Jacob Bernard-Docker to the minors. ) |
| | D | Called up from minors (The Ottawa Senators recalled D Jacob Bernard-Docker from the minors.) |
| | C | Sent to minors (The Ottawa Senators assigned F Zack MacEwen to the minors.) |
| | C | Activated (The Ottawa Senators activated F Josh Norris off Injured Reserve.) |
| | C | Placed on Injured Reserve (The Ottawa Senators placed F Josh Norris on injured reserve.) |
| | LW | Sent to minors (The Ottawa Senators assigned F Jiri Smejkal to the minors.) |
| | D | Sent to minors (The Ottawa Senators assigned D Maxence Guenette to the minors.) |
| | RW | Released (The Ottawa Senators released F Josh Bailey.) |
| | LW | Sent to minors (The Ottawa Senators assigned F Roby Jarventie to the minors.) |
| | G | Sent to minors (The Ottawa Senators assigned G Mads Sogaard to the minors.) |
| | D | Sent to minors (The Ottawa Senators assigned D Dillon Heatherington to the minors.) |
| | D | Sent to minors (The Ottawa Senators assigned D Nikolas Matinpalo to the minors.) |
| | D | Called up from minors (The Ottawa Senators recalled D Nikolas Matinpalo from the minors.) |
| | LW | Sent to minors (The Ottawa Senators assigned F Bokondji Imama to the minors.) |
| | D | Called up from minors (The Ottawa Senators recalled D Dillon Heatherington from the minors.) |
| | LW | Sent to minors (The Ottawa Senators assigned F Zack Ostapchuk to the minors.) |
| | LW | Called up from minors (The Ottawa Senators recalled F Zack Ostapchuk from the minors.) |
| | D | Sent to minors (The Ottawa Senators assigned D Jacob Larsson to the minors.) |
| | RW | Sent to minors (The Ottawa Senators assigned Egor Sokolov to the minors.) |
| | RW | Called up from minors (The Ottawa Senators recalled F Egor Sokolov from the minors.) |
| | RW | Sent to minors (The Ottawa Senators assigned F Tarun Fizer to the minors.) |
| | D | Called up from minors (The Ottawa Senators recalled D Jacob Larsson from the minors.) |
| | RW | Called up from minors (The Ottawa Senators recalled F Tarun Fizer from the minors.) |
| | RW | Sent to minors (The Ottawa Senators assigned F Tyler Boucher to the minors.) |
| | D | Sent to minors (The Ottawa Senators assigned D Nikolas Matinpalo to the minors. ) |
| | D | Sent to minors (The Ottawa Senators assigned D Tyler Kleven to the minors. ) |
| | C | Waived (The Ottawa Senators waived F Matthew Highmore.) |
| | LW | Sent to minors (The Ottawa Senators assigned F Cole Reinhardt to the minors. ) |
| | RW | Waived (The Ottawa Senators waived F Egor Sokolov.) |
| | LW | Sent to minors (The Ottawa Senators assigned F Zack Ostapchuk to the minors. ) |
| | G | Sent to minors (The Ottawa Senators assigned G Kevin Mandolese to the minors. ) |
| | D | Waived (The Ottawa Senators waived D Jacob Bernard-Docker) |
| | D | Waived (The Ottawa Senators waived D Jacob Larsson.) |
| | C | Waived (The Ottawa Senators waived F Garrett Pilon.) |
| | D | Waived (The Ottawa Senators waived D Dillon Heatherington.) |
| | D | Sent to minors (The Ottawa Senators assigned D Djibril Toure to the minors.) |
| | RW | Sent to minors (The Ottawa Senators assigned F Tarun Fizer to the minors.) |
| | D | Waived (The Ottawa Senators waived D Lassi Thomson.) |
| | G | Sent to minors (The Ottawa Senators assigned G Leevi Merilainen to the minors.) |
| | D | Sent to minors (The Ottawa Senators assigned D Ryan MacKinnon to the minors.) |
| | C | Sent to minors (The Ottawa Senators assigned F Philippe Daoust to the minors.) |
| | G | Sent to minors (The Ottawa Senators assigned G Mark Sinclair to the minors.) |
| | C | Sent to minors (The Ottawa Senators assigned F Brennan Saulnier to the minors.) |
| | LW | Sent to minors (The Ottawa Senators assigned F Graham McPhee to the minors.) |
| | LW | Sent to minors (The Ottawa Senators assigned F Angus Crookshank to the minors.) |
| | RW | Waived (The Ottawa Senators waived F Josh Currie.) |
| | D | Sent to minors (The Ottawa Senators assigned D Donovan Sebrango to the minors.) |
| | C | Released (The Ottawa Senators released F Connor Clattenburg.) |
| | LW | Released (The Ottawa Senators released F Jackson Stewart.) |
| | D | Sent to minors (The Ottawa Senators assigned D Matthew Andonovski to the minors.) |
| | D | Sent to minors (The Ottawa Senators assigned D Tomas Hamara to the minors.) |
| | D | Sent to minors (The Ottawa Senators assigned D Hoyt Stanley to the minors.) |
| | C | Called up from minors (The Ottawa Senators recalled F Ridly Greig from the minors.) |
| | RW | Called up from minors (The Ottawa Senators recalled F Tarun Fizer from the minors.) |
| | C | Sent to minors (The Ottawa Senators assigned F Owen Beckner to the minors.) |
| | RW | Called up from minors (The Ottawa Senators recalled F Tyler Boucher from the minors.) |
| | LW | Called up from minors (The Ottawa Senators recalled F Graham McPhee from the minors.) |
| | C | Called up from minors (The Ottawa Senators recalled F Philippe Daoust from the minors.) |
| | D | Called up from minors (The Ottawa Senators recalled D Jorian Donovan from the minors.) |
| | D | Called up from minors (The Ottawa Senators recalled D Ryan MacKinnon from the minors.) |
| | LW | Called up from minors (The Ottawa Senators recalled F Roby Jarventie from the minors.) |
| | RW | Sent to minors (The Ottawa Senators assigned F Oskar Pettersson to the minors.) |
| | D | Called up from minors (The Ottawa Senators recalled D Dillon Heatherington from the minors.) |
| | RW | Sent to minors (The Ottawa Senators assigned F Nicholas VanTassell to the minors.) |
| | D | Called up from minors (The Ottawa Senators recalled D Lassi Thomson from the minors.) |
| | G | Sent to minors (The Ottawa Senators assigned G Vladimir Nikitin to the minors.) |
| | G | Called up from minors (The Ottawa Senators recalled G Leevi Merilainen from the minors.) |
| | LW | Called up from minors (The Ottawa Senators recalled F Zack Ostapchuk from the minors.) |
| | D | Called up from minors (The Ottawa Senators recalled D Maxence Guenette from the minors.) |
| | G | Called up from minors (The Ottawa Senators recalled G Mads Sogaard from the minors.) |
| | C | Called up from minors (The Ottawa Senators recalled F Brennan Saulnier from the minors.) |
| | LW | Called up from minors (The Ottawa Senators recalled F Cole Reinhardt from the minors.) |
| | G | Called up from minors (The Ottawa Senators recalled G Kevin Mandolese from the minors.) |
| | LW | Called up from minors (The Ottawa Senators recalled F Angus Crookshank from the minors.) |
| | D | Signed (The Ottawa Senators signed D Djibril Toureto an entry-level contract.) |
| | LW | Activated (The Ottawa Senators activated F Parker Kelly.) |
| | RW | Signed (The Ottawa Senators signed F Egor Solokov to a two-way contract.) |
| | RW | Signed (The Ottawa Senators signed F Josh Bailey to a professional tryout contract.) |
| | G | Activated (The Ottawa Senators activated G Anton Forsberg.) |
| | RW | Signed (The Ottawa Senators signed F Vladimir Tarasenko. ) |
| | RW | Signed (The Ottawa Senators signed F Vladimir Tarasenko. ) |
| | D | Traded (The Detroit Red Wings traded D Donovan Sebrango to the Ottawa Senators.) |
| | LW | Traded (The Detroit Red Wings traded F Dominik Kubalik to the Ottawa Senators.) From |
| | RW | Traded (The Ottawa Senators traded F Alex DeBrincat to the Detroit Red Wings.) To |
| | C | Signed (The Ottawa Senators signed F Zack MacEwen to a standard contract.) |
| | D | Signed (The Ottawa Senators signed D Travis Hamonic.) |
| | C | Signed (The Ottawa Senators signed F Garrett Pilon.) |
| | RW | Signed (The Ottawa Senators signed F Josh Currie.) |
| | LW | Signed (The Ottawa Senators signed F Bokondji Imama.) |
| | C | Became Unrestricted Free Agent (F Dylan Gambrell declared free agency.) |
| | C | Signed (The Ottawa Senators signed F Matthew Highmore.) |
| | G | Signed (The Ottawa Senators signed G Joonas Korpisalo.) |
| | D | Signed (The Ottawa Senators signed D Jacob Bernard-Docker.) |
| | C | Signed (The Ottawa Senators signed F Rourke Chartier.) |
| | G | Became Unrestricted Free Agent (G Cam Talbot elected free agency.) |
| | C | Became Unrestricted Free Agent (F Derick Brassard elected free agency.) |
| | D | Became Unrestricted Free Agent (D Nick Holden elected free agency.) |
| | C | Became Unrestricted Free Agent (F Patrick Brown elected free agency.) |
| | RW | Became Unrestricted Free Agent (F Julien Gauthier declared free agency.) |
| | LW | Became Unrestricted Free Agent (F Austin Watson elected free agency.) |
| | D | Became Unrestricted Free Agent (D Travis Hamonic elected free agency.) |
| | D | Drafted (The Ottawa Senators drafted D Matthew Andonovski.) |
| | D | Drafted (The Ottawa Senators drafted D Hoyt Stanley.) |
| | RW | Drafted (The Ottawa Senators drafted F Nicholas VanTassell.) |
| | D | Signed (The Ottawa Senators signed D Jacob Larsson to two-way contract.) |
| | G | Drafted (The Ottawa Senators drafted G Vladimir Nikitin.) |
| | C | Drafted (The Ottawa Senators drafted F Owen Beckner.) |
| | RW | Signed (The Ottawa Senators signed F Oskar Pettersson to an entry-level contract.) |