
| Player | Date | P | Comment |
|---|---|---|---|
| 11/3/2026 | RW | Suspension Over (The Ottawa Senators reinstated F Hayden Hodgson from league suspension.) | |
| 11/2/2026 | C | Sent to minors (The Ottawa Senators assigned F Xavier Bourgault to the minors.) | |
| 11/2/2026 | LW | Called up from minors (The Ottawa Senators recalled F Samuel Blais from the minors.) | |
| 10/31/2026 | LW | Placed on Injured Reserve (The Ottawa Senators placed F Andre Burakovsky on injured reserve.) | |
| 10/31/2026 | C | Called up from minors (The Ottawa Senators recalled F Xavier Bourgault from the minors.) | |
| 10/31/2026 | C | Called up from minors (The Ottawa Senators recalled F Philip Tomasino from the minors.) | |
| 10/31/2026 | RW | Suspended (Ottawa Senators F Hayden Hodgson was suspended by the NHL for two games.) | |
| 10/30/2026 | LW | Placed on Injured Reserve (The Ottawa Senators placed F Warren Foegele on injured reserve.) | |
| 10/29/2026 | D | Claimed (The Minnesota Wild claimed D Cameron Crotty off waivers from the Ottawa Senators.) To Minnesota | |
| 10/28/2026 | D | Waived (The Ottawa Senators waived D Cameron Crotty.) | |
| 10/24/2026 | LW | Waived (The Ottawa Senators waived F Kurtis MacDermid.) | |
| 10/22/2026 | G | Placed on Injured Reserve (The Ottawa Senators placed G Linus Ullmark on injured reserve.) | |
| 10/22/2026 | G | Called up from minors (The Ottawa Senators recalled G Jonas Johansson from the minors.) | |
| 10/15/2026 | D | Sent to minors (The Ottawa Senators assigned D Hoyt Stanley to the minors.) | |
| 10/15/2026 | D | Activated (The Ottawa Senators activated D Cameron Crotty from injured reserve.) | |
| 10/15/2026 | D | Sent to minors (The Ottawa Senators assigned D Jorian Donovan to the minors.) | |
| 10/15/2026 | D | Activated (The Ottawa Senators activated D Artem Zub from injured reserve.) | |
| 10/11/2026 | D | Placed on Injured Reserve (The Ottawa Senators placed D Cameron Crotty on injured reserve.) | |
| 10/11/2026 | D | Called up from minors (The Ottawa Senators recalled D Jorian Donovan from the minors.) | |
| 10/10/2026 | LW | Activated (The Ottawa Senators activated F Andre Burakovsky from injured reserve.) | |
| 10/10/2026 | LW | Placed on Injured Reserve (The Ottawa Senators placed F William Eklund on injured reserve.) | |
| 10/8/2026 | D | Called up from minors (The Ottawa Senators recalled D Hoyt Stanley from the minors.) | |
| 10/8/2026 | G | Sent to minors (The Ottawa Senators assigned G Jonas Johansson to the minors.) | |
| 10/6/2026 | G | Called up from minors (The Ottawa Senators recalled G Jonas Johansson from the minors.) | |
| 10/6/2026 | D | Sent to minors (The Ottawa Senators assigned D Jorian Donovan to the minors.) | |
| 10/6/2026 | C | Suspension Over (The Ottawa Senators reinstated F Ridly Greig from league suspension.) | |
| 10/5/2026 | LW | Placed on Injured Reserve (The Ottawa Senators placed F Andre Burakovsky on injured reserve.) | |
| 10/5/2026 | D | Called up from minors (The Ottawa Senators recalled D Jorian Donovan from the minors.) | |
| 10/2/2026 | LW | Activated (The Ottawa Senators activated F Warren Foegele from injured reserve.) | |
| 10/2/2026 | D | Sent to minors (The Ottawa Senators assigned D Hoyt Stanley to the minors.) | |
| 9/28/2026 | LW | Placed on Injured Reserve (The Ottawa Senators placed F Kurtis MacDermid on injured reserve.) | |
| 9/28/2026 | D | Sent to minors (The Ottawa Senators assigned D Jorian Donovan to the minors.) | |
| 9/28/2026 | D | Placed on Injured Reserve (The Ottawa Senators placed D Artem Zub on injured reserve.) | |
| 9/28/2026 | LW | Placed on Injured Reserve (The Ottawa Senators placed F Warren Foegele on injured reserve.) | |
| 9/28/2026 | LW | Not With Team (The Ottawa Senators listed F Warren Foegele as not currently with the team.) | |
| 9/28/2026 | G | Sent to minors (The Ottawa Senators assigned G Lucas Beckman to the minors.) | |
| 9/28/2026 | D | Sent to minors (The Ottawa Senators assigned D Harris Pangretitsch to the minors.) | |
| 9/28/2026 | LW | Sent to minors (The Ottawa Senators assigned F Blake Montgomery to the minors.) | |
| 9/28/2026 | LW | Not With Team (The Ottawa Senators listed F Kurtis MacDermid as not currently with the team.) | |
| 9/28/2026 | D | Sent to minors (The Ottawa Senators assigned D Ben Hutton to the minors.) | |
| 9/27/2026 | RW | Sent to minors (The Ottawa Senators assigned F Jaxon Cover to the minors.) | |
| 9/27/2026 | D | Sent to minors (The Ottawa Senators assigned D Samuel Bolduc to the minors.) | |
| 9/27/2026 | RW | Sent to minors (The Ottawa Senators assigned F Louis-Felix Bourque to the minors.) | |
| 9/27/2026 | C | Sent to minors (The Ottawa Senators assigned F Eskild Bakke Olsen to the minors.) | |
| 9/27/2026 | D | Waived (The Ottawa Senators waived D Christian Kyrou.) | |
| 9/27/2026 | G | Released (The Ottawa Senators released G Vadim Zherenko.) | |
| 9/27/2026 | RW | Sent to minors (The Ottawa Senators assigned F Oskar Pettersson to the minors.) | |
| 9/27/2026 | RW | Sent to minors (The Ottawa Senators assigned F Kasper Halttunen to the minors.) | |
| 9/27/2026 | C | Sent to minors (The Ottawa Senators assigned F Philippe Daoust to the minors.) | |
| 9/27/2026 | LW | Sent to minors (The Ottawa Senators assigned F Adam Nemec to the minors.) | |
| 9/27/2026 | D | Sent to minors (The Ottawa Senators assigned D Tomas Hamara to the minors.) | |
| 9/27/2026 | C | Waived (The Ottawa Senators waived F Ryan Suzuki.) | |
| 9/27/2026 | RW | Released (The Ottawa Senators released F Luke Mistelbacher.) | |
| 9/27/2026 | C | Sent to minors (The Ottawa Senators assigned F Philip Tomasino to the minors.) | |
| 9/27/2026 | D | Sent to minors (The Ottawa Senators assigned D Matthew Andonovski to the minors.) | |
| 9/27/2026 | RW | Waived (The Ottawa Senators waived F Tyler Boucher.) | |
| 9/27/2026 | G | Sent to minors (The Ottawa Senators assigned G Jackson Parsons to the minors.) | |
| 9/27/2026 | C | Sent to minors (The Ottawa Senators assigned F Lucas Ellinas to the minors.) | |
| 9/27/2026 | RW | Sent to minors (The Ottawa Senators assigned F Blake Vanek to the minors.) | |
| 9/27/2026 | LW | Waived (The Ottawa Senators waived F Samuel Blais.) | |
| 9/27/2026 | D | Sent to minors (The Ottawa Senators assigned D Djibril Toure to the minors.) | |
| 9/27/2026 | D | Sent to minors (The Ottawa Senators assigned D Gabriel Eliasson to the minors.) | |
| 9/27/2026 | C | Sent to minors (The Ottawa Senators assigned F Xavier Bourgault to the minors.) | |
| 9/27/2026 | RW | Waived (The Ottawa Senators waived F Landen Hookey.) | |
| 9/27/2026 | G | Sent to minors (The Ottawa Senators assigned G Kevin Reidler to the minors.) | |
| 9/27/2026 | D | Waived (The Ottawa Senators waived D Scott Harrington.) | |
| 9/25/2026 | G | Traded (The Tampa Bay Lightning traded G Jonas Johansson to the Ottawa Senators.) From Tampa Bay | |
| 9/25/2026 | G | Claimed (The Vancouver Canucks claimed G Leevi Meriläinen off waivers from the Ottawa Senators.) To Vancouver | |
| 9/24/2026 | G | Waived (The Ottawa Senators waived G Leevi Meriläinen.) | |
| 9/17/2026 | D | Signed (The Ottawa Senators signed D Ben Hutton.) | |
| 9/16/2026 | RW | Signed (The Ottawa Senators signed F Luke Mistelbacher.) | |
| 9/16/2026 | G | Signed (The Ottawa Senators signed G Vadim Zherenko.) | |
| 9/16/2026 | RW | Signed (The Ottawa Senators signed F Landen Hookey.) | |
| 9/16/2026 | D | Signed (The Ottawa Senators signed D Scott Harrington.) | |
| 7/9/2026 | C | Signed (The Ottawa Senators signed F Xavier Bourgault.) | |
| 7/7/2026 | RW | Signed (The Ottawa Senators signed F Claude Giroux.) | |
| 7/1/2026 | G | Signed (The Ottawa Senators signed G Samuel Ersson.) | |
| 7/1/2026 | C | Signed (The Ottawa Senators signed F Philip Tomasino.) | |
| 7/1/2026 | D | Signed (The Ottawa Senators signed D Christian Kyrou.) | |
| 7/1/2026 | LW | Signed (The Samuel Blais signed F Samuel Blais.) | |
| 7/1/2026 | G | Became Unrestricted Free Agent (G Mads Sogaard elected free agency.) | |
| 7/1/2026 | C | Signed (The Ottawa Senators signed F Nick Cousins.) | |
| 6/30/2026 | G | Became Unrestricted Free Agent (G Mads Sogaard elected free agency.) | |
| 6/30/2026 | G | Became Unrestricted Free Agent (G Samuel Ersson elected free agency.) | |
| 6/30/2026 | C | Became Unrestricted Free Agent (F Garrett Pilon elected free agency.) | |
| 6/30/2026 | RW | Became Unrestricted Free Agent (F Graeme Clarke elected free agency.) | |
| 6/30/2026 | RW | Became Unrestricted Free Agent (F Olle Lycksell elected free agency.) | |
| 6/29/2026 | C | Became Unrestricted Free Agent (The Ottawa Senators F Nick Cousins elected free agency.) | |
| 6/29/2026 | D | Became Unrestricted Free Agent (The Ottawa Senators D Dennis Gilbert elected free agency.) | |
| 6/29/2026 | C | Became Unrestricted Free Agent (F Lars Eller elected free agency.) | |
| 6/29/2026 | RW | Became Unrestricted Free Agent (F Claude Giroux elected free agency.) | |
| 6/29/2026 | G | Became Unrestricted Free Agent (The Ottawa Senators G James Reimer declared free agency.) | |
| 6/29/2026 | D | Became Unrestricted Free Agent (D Nick Jensen elected free agency.) | |
| 6/27/2026 | D | Drafted (The Ottawa Senators draftedD Alexander Grunin.) | |
| 6/27/2026 | D | Drafted (The Ottawa Senators drafted D Harris Pangretitsch.) | |
| 6/27/2026 | C | Drafted (The Ottawa Senators drfated F Oscar Holmertz.) | |
| 6/27/2026 | RW | Drafted (The Ottawa Senators drfated F Louis-Felix Bourque.) | |
| 6/27/2026 | G | Drafted (The Ottawa Senators drafted G Elliot Lennon) | |
| 6/27/2026 | LW | Drafted (The Ottawa Senators drfated F Adam Nemec.) | |
| 6/26/2026 | RW | Drafted (The Ottawa Senators drafted F Jaxon Cover.) | |
| 6/26/2026 | RW | Drafted (The Ottawa Senators drafted F Jonas Lagerberg Hoen.) | |
| 6/26/2026 | LW | Traded (The Chicago Blackhawks traded F Andre Burakovsky to the Ottawa Senators.) From Chicago | |
| 6/26/2026 | G | Traded (The Toronto Maple Leafs traded G Samuel Ersson to the Ottawa Senators.) From Toronto | |
| 6/26/2026 | D | Signed (The Ottawa Senators signed D Djibril Toure to a two-way contract.) | |
| 6/23/2026 | RW | Traded (The San Jose Sharks traded F Kasper Halttunen to the Ottawa Senators.) From San Jose | |
| 6/23/2026 | C | Traded (The San Jose Sharks traded F Brandon Svoboda to the Ottawa Senators.) From San Jose | |
| 6/23/2026 | LW | Traded (The San Jose Sharks traded F William Eklund to the Ottawa Senators.) From San Jose | |
| 6/21/2026 | LW | Traded (The Ottawa Senators traded F Brady Tkachuk to the Florida Panthers.) To Florida |