
| Player | Date | P | Comment |
|---|---|---|---|
| 10/11/2026 | D | Suspension Over (The Boston Bruins reinstated D Charlie McAvoy from suspension.) | |
| 10/5/2026 | C | Activated (The Boston Bruins activated F Matthew Poitras.) | |
| 10/4/2026 | C | Waived (The Boston Bruins waived F Michael Eyssimont.) | |
| 9/29/2026 | G | Sent to minors (The Boston Bruins assigned G Jan Larays to the minors.) | |
| 9/29/2026 | D | Sent to minors (The Boston Bruins assigned D Nolen Geerdes to the minors.) | |
| 9/29/2026 | LW | Sent to minors (The Boston Bruins assigned F Jordan Duguay to the minors.) | |
| 9/29/2026 | C | Sent to minors (The Boston Bruins assigned F Ryan Tattle to the minors.) | |
| 9/29/2026 | RW | Sent to minors (The Boston Bruins assigned F Matvei Kotkov to the minors.) | |
| 9/29/2026 | RW | Sent to minors (The Boston Bruins assigned F Thomas Zocco to the minors.) | |
| 9/29/2026 | RW | Sent to minors (The Boston Bruins assigned F Niko Tournas to the minors.) | |
| 9/29/2026 | G | Sent to minors (The Boston Bruins assigned G Kyle Chauvette to the minors.) | |
| 9/29/2026 | LW | Sent to minors (The Boston Bruins assigned F William Manchuso to the minors.) | |
| 9/27/2026 | C | Placed on Injured Reserve (The Boston Bruins placed F Matthew Poitras on injured reserve.) | |
| 9/27/2026 | C | Sent to minors (The Boston Bruins assigned F Dans Locmelis to the minors.) | |
| 9/27/2026 | D | Waived (The Boston Bruins waived D Henri Jokiharju.) | |
| 9/27/2026 | C | Sent to minors (The Boston Bruins assigned F Riley Duran to the minors.) | |
| 9/27/2026 | LW | Sent to minors (The Boston Bruins assigned F Jake Schmaltz to the minors.) | |
| 9/26/2026 | C | Sent to minors (The Boston Bruins assigned F Brendan Gaunce to the minors.) | |
| 9/26/2026 | D | Sent to minors (The Boston Bruins assigned D Ty Gallagher to the minors.) | |
| 9/26/2026 | LW | Sent to minors (The Boston Bruins assigned F Lukas Reichel to the minors.) | |
| 9/26/2026 | C | Sent to minors (The Boston Bruins assigned F Alex Steeves to the minors.) | |
| 9/25/2026 | LW | Sent to minors (The Boston Bruins assigned F Attilio Biasca to the minors.) | |
| 9/25/2026 | LW | Sent to minors (The Boston Bruins assigned F Joseph Abate to the minors.) | |
| 9/25/2026 | C | Sent to minors (The Boston Bruins assigned F Ivan Ivan to the minors.) | |
| 9/24/2026 | G | Sent to minors (The Boston Bruins assigned G Simon Zajicek to the minors.) | |
| 9/23/2026 | D | Waived (The Boston Bruins waived D Maxence Guenette.) | |
| 9/22/2026 | D | Sent to minors (The Boston Bruins assigned D Tobie Bisson to the minors.) | |
| 9/21/2026 | LW | Sent to minors (The Boston Bruins assigned F Kalle Vaisanen to the minors.) | |
| 9/21/2026 | G | Sent to minors (The Boston Bruins assigned G Luke Cavallin to the minors.) | |
| 9/21/2026 | G | Sent to minors (The Boston Bruins assigned G Max Lundgren to the minors.) | |
| 9/21/2026 | LW | Sent to minors (The Boston Bruins assigned F Wyatt Bongiovanni to the minors.) | |
| 9/21/2026 | D | Sent to minors (The Boston Bruins assigned D Loke Johansson to the minors.) | |
| 9/20/2026 | LW | Waived (The Boston Bruins waived F Navrin Mutter.) | |
| 9/20/2026 | LW | Signed (The Boston Bruins signed F Jordan Duguay.) | |
| 9/20/2026 | G | Signed (The Boston Bruins signed G Jan Larays.) | |
| 9/20/2026 | RW | Signed (The Boston Bruins signed F Niko Tournas.) | |
| 9/20/2026 | C | Signed (The Boston Bruins signed F Ryan Tattle.) | |
| 9/20/2026 | RW | Signed (The Boston Bruins signed F Thomas Zocco.) | |
| 9/20/2026 | D | Signed (The Boston Bruins signed D Nolen Geerdes.) | |
| 9/20/2026 | LW | Signed (The Boston Bruins signed F William Manchuso.) | |
| 9/16/2026 | D | Signed (The Boston Bruins signed D Tobie Bisson.) | |
| 9/16/2026 | LW | Signed (The Boston Bruins signed F Wyatt Bongiovanni.) | |
| 9/16/2026 | D | Signed (The Boston Bruins signed D Ty Gallagher.) | |
| 9/16/2026 | LW | Signed (The Boston Bruins signed F Joseph Abate.) | |
| 9/16/2026 | LW | Signed (The Boston Bruins signed F Jake Schmaltz.) | |
| 9/16/2026 | C | Signed (The Boston Bruins signed F Matthew Poitras.) | |
| 7/9/2026 | C | Signed (The Boston Bruins signed F Riley Duran to a two-way contract.) | |
| 7/1/2026 | LW | Traded (The New York Rangers traded F Kalle Vaisanen to the Boston Bruins.) From NY Rangers | |
| 7/1/2026 | G | Traded (The Boston Bruins traded G Joonas Korpisalo to the New York Rangers.) To NY Rangers | |
| 7/1/2026 | D | Signed (The Boston Bruins signed D Connor Clifton.) | |
| 7/1/2026 | D | Traded (The New York Rangers traded D Will Borgen to the Boston Bruins.) From NY Rangers | |
| 7/1/2026 | G | Signed (The Boston Bruins signed G Jiri Patera.) | |
| 7/1/2026 | LW | Signed (The Boston Bruins signed F Brian Halonen.) | |
| 7/1/2026 | C | Signed (The Boston Bruins signed F Brendan Gaunce.) | |
| 7/1/2026 | D | Signed (The Boston Bruins signed D Maxence Guenette.) | |
| 6/30/2026 | C | Became Unrestricted Free Agent (F Georgii Merkulov elected free agency.) | |
| 6/30/2026 | D | Became Unrestricted Free Agent (D Michael Callahan elected free agency.) | |
| 6/30/2026 | D | Became Unrestricted Free Agent (D Victor Soderstrom elected free agency.) | |
| 6/29/2026 | C | Became Unrestricted Free Agent (F John Farinacci elected free agency.) | |
| 6/29/2026 | RW | Became Unrestricted Free Agent (The Boston Bruins F Matej Blume elected free agency.) | |
| 6/29/2026 | LW | Became Unrestricted Free Agent (F Riley Tufte elected free agency.) | |
| 6/29/2026 | D | Became Unrestricted Free Agent (D Andrew Peeke elected free agency.) | |
| 6/29/2026 | LW | Became Unrestricted Free Agent (F Viktor Arvidsson elected free agency.) | |
| 6/28/2026 | RW | Traded (The Boston Bruins traded F Fabian Lysell to the Colorado Avalanche.) To Colorado | |
| 6/28/2026 | C | Traded (The Colorado Avalanche traded F Ivan Ivan to the Boston Bruins.) From Colorado | |
| 6/27/2026 | D | Drafted (The Boston Bruins drafted D Cullen McCrate) | |
| 6/27/2026 | D | Drafted (The Boston Bruins drafted D Jacob Vandeven.) | |
| 6/27/2026 | G | Drafted (The Boston Bruins drafted G Roberto Leandro Henriquez.) | |
| 6/27/2026 | LW | Drafted (The Boston Bruins drafted F Oscar Olsson) | |
| 6/27/2026 | RW | Drafted (The Boston Bruins drafted F Matvei Kotkov) | |
| 6/27/2026 | RW | Drafted (The Boston Bruins drafted F Nils Bartholdsson.) | |
| 6/27/2026 | G | Drafted (The Boston Bruins drafted G Yuri Ivanov.) | |
| 6/26/2026 | RW | Traded (The Utah Mammoth traded F JJ Peterka to the Boston Bruins.) From Utah | |
| 6/18/2026 | C | Traded (The Boston Bruins traded F Andre Gasseau to the San Jose Sharks.) To San Jose |