| Zemgus Girgensons | 10/25/2025 | C | Activated (The Tampa Bay Lightning activated F Zemgus Girgensons from injured reserve.) |
| Scott Sabourin | 10/24/2025 | RW | Sent to minors (The Tampa Bay Lightning sent F Scott Sabourin to the minors.) |
| Scott Sabourin | 10/23/2025 | RW | Called up from minors (The Tampa Bay Lightning recalled F Scott Sabourin from the minors.) |
| Dominic James | 10/22/2025 | C | Called up from minors (The Tampa Bay Lightning recalled F Dominic James.) |
| Charle-Edouard D'Astous | 10/20/2025 | D | Called up from minors (The Tampa Bay lightning recalled D Charle-Edouard D'Astous from the minors.) |
| Conor Geekie | 10/20/2025 | C | Sent to minors (The Tampa Bay Lightning sent F Conor Geekie to the minors.) |
| Steven Santini | 10/19/2025 | D | Sent to minors (The Tampa Bay Lightning sent D Steven Santini to the minors.) |
| Scott Sabourin | 10/19/2025 | RW | Sent to minors (The Tampa Bay Lightning sent F Scott Sabourin to the minors.) |
| Max Crozier | 10/17/2025 | D | Placed on Injured Reserve (The Tampa Bay Lightning placed D Max Crozier on injured reserve.) |
| Scott Sabourin | 10/17/2025 | RW | Called up from minors (The Tampa Bay Lightning recalled F Scott Sabourin from the minors.) |
| Steven Santini | 10/17/2025 | D | Called up from minors (The Tampa Bay Lightning recalled D Steven Santini from the minors.) |
| Pheonix Copley | 10/15/2025 | G | Traded (The Tampa Bay Lightning traded G Pheonix Copley to the Los Angeles Kings.) To Los Angeles |
| J.J. Moser | 10/12/2025 | D | Activated (The Tampa Bay Lightning activated D J.J. Moser after serving a two-game suspension.) |
| Boris Katchouk | 10/7/2025 | LW | Waived (The Tampa Bay Lightning waived F Boris Katchouk.) |
| Wojciech Stachowiak | 10/7/2025 | LW | Waived (The Tampa Bay Lightning waived F Wojciech Stachowiak.) |
| Dylan Duke | 10/7/2025 | LW | Waived (The Tampa Bay Lightning waived F Dylan Duke.) |
| Roman Schmidt | 10/7/2025 | D | Waived (The Tampa Bay Lightning waived D Roman Schmidt.) |
| Charle-Edouard D'Astous | 10/7/2025 | D | Waived (The Tampa Bay Lightning waived D Charle-Edouard D'Astous.) |
| Niko Huuhtanen | 10/6/2025 | RW | Placed on Injured Reserve (The Tampa Bay Lightning placed F Niko Huuhtanen on injured reserve.) |
| J.J. Moser | 10/6/2025 | D | Suspended (The NHL suspended Tampa Bay Lightning's D J.J. Moser for two games for boarding.) |
| Nick Paul | 10/6/2025 | LW | Placed on Injured Reserve (The Tampa Bay Lightning placed F Nick Paul on the Injured Reserve.) |
| Zemgus Girgensons | 10/6/2025 | C | Placed on Injured Reserve (The Tampa Bay Lightning placed F Zemgus Girgensons on the Injured Reserve.) |
| Scott Sabourin | 10/6/2025 | RW | Sent to minors (The Tampa Bay Lightning sent F Scott Sabourin to the minors.) |
| Curtis Douglas | 10/6/2025 | C | Claimed (The Tampa Bay Lightning claimed F Curtis Douglas off waivers from the Utah Mammoth.) From Utah |
| Declan Carlile | 10/5/2025 | D | Waived (The Tampa Bay Lightning waived D Declan Carlile.) |
| Roman Schmidt | 10/4/2025 | D | Called up from minors (The Tampa Bay Lightning recalled D Roman Schmidt from the minors.) |
| Wojciech Stachowiak | 10/4/2025 | LW | Called up from minors (The Tampa Bay Lightning recalled F Wojciech Stachowiak from the minors.) |
| Boris Katchouk | 10/4/2025 | LW | Called up from minors (The Tampa Bay Lightning recalled F Boris Katchouk from the minors.) |
| Dylan Duke | 10/4/2025 | LW | Called up from minors (The Tampa Bay Lightning recalled F Dylan Duke from the minors.) |
| Scott Sabourin | 10/4/2025 | RW | Called up from minors (The Tampa Bay Lightning recalled F Scott Sabourin from the minors.) |
| Charle-Edouard D'Astous | 10/4/2025 | D | Called up from minors (The Tampa Bay Lightning recalled D Charle-Edouard D'Astous from the minors.) |
| Brandon Halverson | 10/3/2025 | G | Waived (The Tampa Bay Lightning waived G Brandon Halverson.) |
| Pheonix Copley | 10/2/2025 | G | Claimed (The Tampa Bay Lightning claimed G Pheonix Copley from the Los Angeles Kings.) From Los Angeles |
| Boris Katchouk | 10/1/2025 | LW | Sent to minors (The Tampa Bay Lightning waived F Boris Katchouk.) |
| Scott Sabourin | 10/1/2025 | RW | Sent to minors (The Tampa Bay Lightning sent F Scott Sabourin to the minors.) |
| Dylan Duke | 10/1/2025 | LW | Sent to minors (The Tampa Bay Lightning sent F Dylan Duke to the minors.) |
| Roman Schmidt | 10/1/2025 | D | Sent to minors (The Tampa Bay Lightning sent D Roman Schmidt to the minors.) |
| Wojciech Stachowiak | 10/1/2025 | LW | Sent to minors (The Tampa Bay Lightning sent F Wojciech Stachowiak to the minors.) |
| Nicholas Abruzzese | 10/1/2025 | C | Waived (The Tampa Bay Lightning waived F Nicholas Abruzzese.) |
| Jakob Pelletier | 10/1/2025 | LW | Waived (The Tampa Bay Lightning waived F Jakob Pelletier.) |
| Scott Sabourin | 9/30/2025 | RW | Called up from minors (The Tampa Bay Lightning recalled F Scott Sabourin from the minors.) |
| Maxim Groshev | 9/28/2025 | RW | Sent to minors (The Tampa Bay Lightning sent F Maxim Groshev to the minors.) |
| Lucas Mercuri | 9/28/2025 | C | Sent to minors (The Tampa Bay Lightning sent F Lucas Mercuri to the minors.) |
| Charle-Edouard D'Astous | 9/28/2025 | D | Sent to minors (The Tampa Bay Lightning sent D Charle-Edouard D'Astous to the minors.) |
| Spencer Kersten | 9/28/2025 | RW | Sent to minors (The Tampa Bay Lightning sent F Spencer Kersten to the minors.) |
| Harrison Meneghin | 9/28/2025 | G | Sent to minors (The Tampa Bay Lightning sent G Harrison Meneghin to the minors.) |
| Connor Kurth | 9/28/2025 | RW | Sent to minors (The Tampa Bay Lightning sent F Connor Kurth to the minors.) |
| Matt Pietroniro | 9/28/2025 | D | Sent to minors (The Tampa Bay Lightning sent D Matt Pietroniro to the minors.) |
| Niko Huuhtanen | 9/28/2025 | RW | Sent to minors (The Tampa Bay Lightning sent F Niko Huuhtanen to the minors.) |
| Milo Roelens | 9/28/2025 | C | Sent to minors (The Tampa Bay Lightning sent F Milo Roelens to the minors.) |
| Tommy Miller | 9/28/2025 | D | Sent to minors (The Tampa Bay Lightning sent D Tommy Miller to the minors.) |
| Chris Harpur | 9/28/2025 | D | Sent to minors (The Tampa Bay Lightning sent D Chris Harpur to the minors.) |
| Ethan Gauthier | 9/28/2025 | RW | Sent to minors (The Tampa Bay Lightning sent F Ethan Gauthier to the minors.) |
| Gabriel Szturc | 9/28/2025 | C | Sent to minors (The Tampa Bay Lightning sent F Gabriel Szturc to the minors.) |
| Reece Newkirk | 9/28/2025 | C | Sent to minors (The Tampa Bay Lightning sent F Reece Newkirk to the minors.) |
| Brendan Furry | 9/28/2025 | LW | Sent to minors (The Tampa Bay Lightning sent F Brendan Furry to the minors.) |
| Dyllan Gill | 9/28/2025 | D | Sent to minors (The Tampa Bay Lightning sent D Dyllan Gill to the minors.) |
| Steven Santini | 9/28/2025 | D | Waived (The Tampa Bay Lightning waived D Steven Santini.) |
| Simon Lundmark | 9/28/2025 | D | Waived (The Tampa Bay Lightning waived D Simon Lundmark.) |
| Cooper Flinton | 9/28/2025 | LW | Sent to minors (The Tampa Bay Lightning sent F Cooper Flinton to the minors.) |
| Ryan Fanti | 9/28/2025 | G | Waived (The Tampa Bay Lightning waived G Ryan Fanti.) |
| Scott Sabourin | 9/28/2025 | RW | Waived (The Tampa Bay Lightning waived F Scott Sabourin.) |
| Tristan Allard | 9/28/2025 | LW | Sent to minors (The Tampa Bay Lighting sent F Tristan Allard to the minors.) |
| Marco Mignosa | 9/24/2025 | RW | Sent to minors (The Tampa Bay Lightning sent F Marco Mignosa to the minors.) |
| Sam O'Reilly | 9/24/2025 | RW | Sent to minors (The Tampa Bay Lightning sent F Sam O'Reilly to the minors.) |
| Aiden Foster | 9/24/2025 | C | Sent to minors (The Tampa Bay Lightning sent F Aiden Foster to the minors.) |
| Maddox Labre | 9/24/2025 | D | Sent to minors (The Tampa Bay Lightning sent D Maddox Labre to the minors.) |
| Maddox Labre | 9/24/2025 | D | Released (The Tampa Bay Lightning released D Maddox Labre.) |
| Everett Baldwin | 9/24/2025 | D | Sent to minors (The Tampa Bay Lightning sent D Everett Baldwin to the minors.) |
| Grant Spada | 9/24/2025 | D | Sent to minors (The Tampa Bay Lightning sent D Grant Spada to the minors.) |
| Ethan Czata | 9/24/2025 | C | Sent to minors (The Tampa Bay Lightning sent F Ethan Czata to the minors.) |
| Caleb Heil | 9/24/2025 | G | Sent to minors (The Tampa Bay Lightning sent G Caleb Heil to the minors.) |
| Jan Golicic | 9/24/2025 | D | Sent to minors (The Tampa Bay Lightning sent D Jan Golicic to the minors.) |
| Kaden Pitre | 9/24/2025 | C | Sent to minors (The Tampa Bay Lightning sent F Kaden Pitre to the minors.) |
| Dominic James | 9/20/2025 | C | Signed (The Tampa Bay Lightning signed F Dominic James to an entry-level contract.) |
| Ethan Czata | 7/23/2025 | C | Signed (The Tampa Lightning signed F Ethan Czatato to an entryl-level contract.) |
| Ethan Czata | 7/23/2025 | C | Signed (The Tampa Lightning signed F Ethan Czatato an entryl-level contract.) |
| Isaac Howard | 7/9/2025 | LW | Traded (The Tampa Bay Lightning traded F Isaac Howard to the Edmonton Oilers.) To Edmonton |
| Sam O'Reilly | 7/9/2025 | RW | Traded (The Edmonton Oilers traded F Sam O'Reilly to the Tampa Bay Lightning.) From Edmonton |
| Jakob Pelletier | 7/1/2025 | LW | Signed (The Tampa Bay Lightning signed F Jakob Pelletier.) |
| Boris Katchouk | 7/1/2025 | LW | Signed (The Tampa Bay Lightning signed F Boris Katchouk.) |
| Ryan Fanti | 7/1/2025 | G | Signed (The Tampa Bay lightning signed G Ryan Fanti.) |
| Gage Goncalves | 7/1/2025 | C | Contract extended (The Tampa Bay Lightning signed F Gage Goncalves to a contract extension.) |
| Simon Lundmark | 7/1/2025 | D | Signed (The Tampa Bay Lightning signed D Simon Lundmark.) |
| Nicholas Abruzzese | 7/1/2025 | C | Signed (The Tampa Bay Lightning signed F Nick Abruzzese.) |
| Pontus Holmberg | 7/1/2025 | RW | Signed (The Tampa Bay Lightning signed F Pontus Holmberg.) |
| Matt Tomkins | 6/30/2025 | G | Became Unrestricted Free Agent (G Matt Tomkins elected free agency.) |
| Luke Glendening | 6/30/2025 | C | Became Unrestricted Free Agent (F Luke Glendening elected free agency.) |
| Cam Atkinson | 6/30/2025 | RW | Became Unrestricted Free Agent (F Cam Atkinson elected free agency.) |
| Nick Perbix | 6/30/2025 | D | Became Unrestricted Free Agent (Tampa Bay Lightning D Nick Perbix declared free agency.) |
| Grant Spada | 6/28/2025 | D | Drafted (The Tampa Bay Lightning drafted D Grant Spada.) |
| Roman Luttsev | 6/28/2025 | C | Drafted (The Tampa Bay Lightning drafted F Roman Luttsev) |
| Marco Mignosa | 6/28/2025 | RW | Drafted (The Tampa Bay Lightning drafted F Marco Mignosa) |
| Everett Baldwin | 6/28/2025 | D | Drafted (The Tampa Bay Lightning drafted D Everett Baldwin.) |
| Caleb Heil | 6/28/2025 | G | Drafted (The Tampa Bay Lightning drafted G Caleb Heil) |
| Benjamin Rautiainen | 6/28/2025 | C | Drafted (The Tampa Bay Lightning drafted F Benjamin Rautiainen.) |
| Aiden Foster | 6/28/2025 | C | Drafted (The Tampa Bay Lightning drafted F Aiden Foster.) |
| Ethan Czata | 6/28/2025 | C | Drafted (The Tampa Bay Lightning drafted F Ethan Czata.) |
