| Date | Player | POS | Transaction |
|---|---|---|---|
| Dec 4, 2025 | S. HallidayStephen Halliday | C | Called up from minors from Belleville-AHL |
| Dec 2, 2025 | H. HodgsonHayden Hodgson | RW | Sent to minors Belleville-AHL |
| Nov 29, 2025 | D. GilbertDennis Gilbert | D | Called up from minors from Belleville-AHL |
| Nov 28, 2025 | S. HallidayStephen Halliday | C | Sent to minors Belleville-AHL |
| Nov 22, 2025 | L. ThomsonLassi Thomson | D | Sent to minors Belleville-AHL |
| Nov 22, 2025 | O. LycksellOlle Lycksell | RW | Sent to minors Belleville-AHL |
| Nov 22, 2025 | T. ChabotThomas Chabot | D | Placed on IR Upper-body injury - left game |
| Nov 21, 2025 | O. LycksellOlle Lycksell | RW | Waived |
| Nov 18, 2025 | S. HallidayStephen Halliday | C | Called up from minors from Belleville-AHL |
| Nov 18, 2025 | L. ThomsonLassi Thomson | D | Called up from minors from Belleville-AHL |
| Nov 17, 2025 | O. LycksellOlle Lycksell | RW | Placed on IR Concussion |
| Nov 17, 2025 | D. GilbertDennis Gilbert | D | Traded for Maxence Guenette |
| Nov 13, 2025 | S. PintoShane Pinto | C | Contract extended Four-year contract extension |
| Nov 9, 2025 | H. HodgsonHayden Hodgson | RW | Called up from minors from Belleville-AHL |
| Nov 2, 2025 | L. MerilainenLeevi Merilainen | G | Called up from minors from Belleville-AHL |
| Nov 2, 2025 | H. ShepardHunter Shepard | G | Sent to minors Belleville-AHL |
| Nov 1, 2025 | H. ShepardHunter Shepard | G | Called up from minors from Belleville-AHL |
| Nov 1, 2025 | L. MerilainenLeevi Merilainen | G | Sent to minors Belleville-AHL |
| Oct 28, 2025 | H. ShepardHunter Shepard | G | Sent to minors Belleville-AHL |
| Oct 27, 2025 | H. ShepardHunter Shepard | G | Called up from minors from Belleville-AHL |
| Oct 23, 2025 | M. SogaardMads Sogaard | G | Sent to minors Belleville-AHL |
| Oct 23, 2025 | L. MerilainenLeevi Merilainen | G | Called up from minors from Belleville-AHL |
| Oct 21, 2025 | O. LycksellOlle Lycksell | RW | Called up from minors from Belleville-AHL |
| Oct 20, 2025 | A. KaliyevArthur Kaliyev | RW | Sent to minors Belleville-AHL |
| Oct 19, 2025 | M. SogaardMads Sogaard | G | Called up from minors from Belleville-AHL |
| Oct 19, 2025 | L. MerilainenLeevi Merilainen | G | Sent to minors Belleville-AHL |
| Oct 17, 2025 | O. LycksellOlle Lycksell | RW | Sent to minors Belleville-AHL |
| Oct 16, 2025 | A. KaliyevArthur Kaliyev | RW | Called up from minors from Belleville-AHL |
| Oct 14, 2025 | D. SebrangoDonovan Sebrango | D | Waived |
| Oct 13, 2025 | B. TkachukBrady Tkachuk | LW | Placed on IR Torn thumb - left game |
| Oct 6, 2025 | C. YakemchukCarter Yakemchuk | D | Sent to minors Belleville-AHL |
| Oct 6, 2025 | A. KaliyevArthur Kaliyev | RW | Sent to minors Belleville-AHL |
| Oct 6, 2025 | J. JenikJan Jenik | RW | Sent to minors Belleville-AHL |
| Oct 6, 2025 | M. SogaardMads Sogaard | G | Sent to minors Belleville-AHL |
| Oct 6, 2025 | L. ThomsonLassi Thomson | D | Sent to minors Belleville-AHL |
| Oct 6, 2025 | H. HodgsonHayden Hodgson | RW | Sent to minors Belleville-AHL |
| Oct 5, 2025 | M. SogaardMads Sogaard | G | Waived |
| Oct 5, 2025 | A. KaliyevArthur Kaliyev | RW | Waived |
| Oct 5, 2025 | K. Washkurak Keean Washkurak | — | Released |
| Oct 5, 2025 | L. ThomsonLassi Thomson | D | Waived |
| Oct 5, 2025 | O. LycksellOlle Lycksell | RW | Waived |
| Oct 5, 2025 | H. HodgsonHayden Hodgson | RW | Waived |
| Oct 5, 2025 | J. JenikJan Jenik | RW | Waived |
| Oct 5, 2025 | X. BourgaultXavier Bourgault | RW | Sent to minors Belleville-AHL |
| Oct 5, 2025 | S. HallidayStephen Halliday | C | Sent to minors Belleville-AHL |
| Oct 3, 2025 | K. MacDermidKurtis MacDermid | LW | Traded for Zack MacEwen |
| Oct 3, 2025 | O. PetterssonOskar Pettersson | RW | Sent to minors Belleville-AHL |
| Oct 3, 2025 | T. HamaraTomas Hamara | D | Sent to minors Belleville-AHL |
| Oct 3, 2025 | H. ShepardHunter Shepard | G | Sent to minors Belleville-AHL |
| Oct 3, 2025 | T. BoucherTyler Boucher | RW | Sent to minors Belleville-AHL |
| Oct 3, 2025 | J. DonovanJorian Donovan | D | Sent to minors Belleville-AHL |
| Oct 1, 2025 | H. ShepardHunter Shepard | G | Called up from minors from Belleville-AHL |
| Oct 1, 2025 | J. DonovanJorian Donovan | D | Called up from minors from Belleville-AHL |
| Oct 1, 2025 | T. HamaraTomas Hamara | D | Called up from minors from Belleville-AHL |
| Oct 1, 2025 | X. BourgaultXavier Bourgault | RW | Called up from minors from Belleville-AHL |
| Oct 1, 2025 | O. PetterssonOskar Pettersson | RW | Called up from minors from Belleville-AHL |
| Oct 1, 2025 | T. BoucherTyler Boucher | RW | Called up from minors from Belleville-AHL |
| Sep 26, 2025 | G. PilonGarrett Pilon | C | Sent to minors Belleville-AHL |
| Sep 26, 2025 | L. EllinasLucas Ellinas | LW | Assigned to Junior Club Kitchener-OHL |
| Sep 26, 2025 | H. ShepardHunter Shepard | G | Sent to minors Belleville-AHL |
| Sep 26, 2025 | W. BongiovanniWyatt Bongiovanni | LW | Sent to minors Belleville-AHL |
| Sep 26, 2025 | C. CrottyCam Crotty | D | Sent to minors Belleville-AHL |
| Sep 26, 2025 | X. BourgaultXavier Bourgault | RW | Sent to minors Belleville-AHL |
| Sep 25, 2025 | J. ChiassonJake Chiasson | RW | Sent to minors Belleville-AHL |
| Sep 25, 2025 | C. CrottyCam Crotty | D | Waived |
| Sep 25, 2025 | J. ReesJamieson Rees | C | Released |
| Sep 25, 2025 | P. DaoustPhilippe Daoust | — | Released |
| Sep 25, 2025 | G. PilonGarrett Pilon | C | Waived |
| Sep 25, 2025 | T. HamaraTomas Hamara | D | Sent to minors Belleville-AHL |
| Sep 25, 2025 | H. ShepardHunter Shepard | G | Waived |
| Sep 25, 2025 | W. BongiovanniWyatt Bongiovanni | LW | Waived |
| Sep 25, 2025 | O. PetterssonOskar Pettersson | RW | Sent to minors Belleville-AHL |
| Sep 25, 2025 | J. DonovanJorian Donovan | D | Sent to minors Belleville-AHL |
| Sep 25, 2025 | X. BourgaultXavier Bourgault | RW | Waived |
| Sep 25, 2025 | T. BoucherTyler Boucher | RW | Sent to minors Belleville-AHL |
| Sep 23, 2025 | D. BathersonDrake Batherson | RW | Placed on IR Upper-body injury |
| Sep 21, 2025 | T. KlevenTyler Kleven | D | Placed on IR Undisclosed injury - left game |
| Sep 21, 2025 | B. VanekBlake Vanek | RW | Assigned to Junior Club Wenatchee-WHL |
| Sep 16, 2025 | J. ReesJamieson Rees | C | Invited to Training Camp |
| Sep 16, 2025 | P. DaoustPhilippe Daoust | — | Invited to Training Camp |
| Sep 16, 2025 | K. Washkurak Keean Washkurak | — | Invited to Training Camp |
| Sep 3, 2025 | D. SebrangoDonovan Sebrango | D | Re-Signed One-year, two-way contract |
| Aug 25, 2025 | J. JenikJan Jenik | RW | Re-Signed One-year, two-way contract |
| Aug 25, 2025 | C. CrottyCam Crotty | D | Signed as Free Agent Two-year, two-way contract |
| Jul 18, 2025 | X. BourgaultXavier Bourgault | RW | Re-Signed One-year, two-way contract |
| Jul 3, 2025 | H. HodgsonHayden Hodgson | RW | Signed as Free Agent Two-year, two-way contract |
| Jul 2, 2025 | H. ShepardHunter Shepard | G | Signed as Free Agent One-year, two-way contract |
| Jul 2, 2025 | A. KaliyevArthur Kaliyev | RW | Signed as Free Agent One-year, two-way contract |
| Jul 1, 2025 | W. BongiovanniWyatt Bongiovanni | LW | Signed as Free Agent One-year, two-way contract |
| Jul 1, 2025 | T. HamonicTravis Hamonic | D | Became Unrestricted Free Agent |
| Jul 1, 2025 | A. GaudetteAdam Gaudette | C | Became Unrestricted Free Agent |
| Jul 1, 2025 | H. HodgsonHayden Hodgson | RW | Became Unrestricted Free Agent |
| Jul 1, 2025 | M. HighmoreMatthew Highmore | C | Became Unrestricted Free Agent |
| Jul 1, 2025 | T. RobinsTristen Robins | C | Became Unrestricted Free Agent Not tendered a qualifying offer |
| Jul 1, 2025 | A. CrookshankAngus Crookshank | LW | Became Unrestricted Free Agent |
| Jul 1, 2025 | C. ReinhardtCole Reinhardt | LW | Became Unrestricted Free Agent |
| Jul 1, 2025 | D. GilbertDennis Gilbert | D | Became Unrestricted Free Agent |
| Jul 1, 2025 | A. ForsbergAnton Forsberg | G | Became Unrestricted Free Agent |
| Jul 1, 2025 | N. CousinsNick Cousins | C | Signed as Free Agent One-year contract |
| Jul 1, 2025 | F. RoosFilip Roos | D | Became Unrestricted Free Agent |
| Jul 1, 2025 | O. LycksellOlle Lycksell | RW | Signed as Free Agent One-year, two-way contract |
| Jul 1, 2025 | N. CousinsNick Cousins | C | Became Unrestricted Free Agent |
| Jul 1, 2025 | J. ReesJamieson Rees | C | Became Unrestricted Free Agent Not tendered a qualifying offer |
| Jul 1, 2025 | L. EllerLars Eller | C | Signed as Free Agent One-year contract |
| Jul 1, 2025 | V. AbramovVitaly Abramov | RW | Became Unrestricted Free Agent |
| Jul 1, 2025 | W. BongiovanniWyatt Bongiovanni | LW | Became Unrestricted Free Agent |
| Jul 1, 2025 | P. DaoustPhilippe Daoust | — | Became Unrestricted Free Agent Not tendered a qualifying offer |
| Jul 1, 2025 | J. DaviesJeremy Davies | D | Became Unrestricted Free Agent |
| Jun 30, 2025 | L. MerilainenLeevi Merilainen | G | Contract extended One-year contract extension |
| Jun 29, 2025 | C. GirouxClaude Giroux | LW | Contract extended One-year contract extension |
| Jun 28, 2025 | J. SpenceJordan Spence | D | Traded for '25 3rd-rd pick, '26 6th-rd pick |
| Jun 19, 2025 | F. ZetterlundFabian Zetterlund | LW | Contract extended Three-year contract extension |
| Jun 15, 2025 | L. ThomsonLassi Thomson | D | Signed as Free Agent One-year, two-way contract |
Overall 13-10-4 • ATL 5th
Ottawa Senators
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- Overall13-10-4
- ATL5th
Ottawa Senators
- Anaheim Ducks
- Boston Bruins
- Buffalo Sabres
- Calgary Flames
- Carolina Hurricanes
- Chicago Blackhawks
- Colorado Avalanche
- Columbus Blue Jackets
- Dallas Stars
- Detroit Red Wings
- Edmonton Oilers
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- Seattle Kraken
- St. Louis Blues
- Tampa Bay Lightning
- Toronto Maple Leafs
- Utah Mammoth
- Vancouver Canucks
- Vegas Golden Knights
- Washington Capitals
- Winnipeg Jets