| | C | Activated (The St. Louis Blues activated F Robert Thomas from injured reserve.) |
| | RW | Claimed (The Edmonton Oilers claimed F Kasperi Kapanen off waivers from the St. Louis Blues.) To |
| | RW | Waived (The St. Louis Blues waived F Kasperi Kapanen.) |
| | RW | Waived (The St. Louis Blues waived F Jack Campbell.) |
| | D | Called up from minors (The St. Louis Blues recalled D Corey Schueneman from the minors.) |
| | D | Sent to minors (The St. Lous Blues sent D Leo Loof to the minors.) |
| | D | Called up from minors (The St. Louis Blues recalled D Leo Loof from the minors.) |
| | D | Placed on Injured Reserve (The St. Louis Blues placed D Philip Broberg on injured reserve.) |
| | RW | Contract extended (The St. Louis Blues signed F Alexey Toropchenko to a contract extension.) |
| | D | Sent to minors (The St. Louis Blues sent D Adam Jiricek to the minors.) |
| | D | Activated (The St. Louis Blue activated D Adam Jiricek from injured reserve.) |
| | C | Placed on Injured Reserve (The St. Louis Blues placed F Robert Thomas on injured reserve.) |
| | C | Activated (The St. Louis Blues activated F Oskar Sundqvist from Injured Reserve.) |
| | C | Activated (The St. Louis Blues activated F Alexandre Texier from injured reserve.) |
| | D | Placed on Injured Reserve (The St. Louis Blues placed D Nick Leddy on Injured Reserve) |
| | RW | Activated (The St. Louis Blues activated F Simon Robertsson from the IR and sent him to the minors.) |
| | C | Placed on Injured Reserve (The St Louis Blues placed F Alexandre Texier on injured reserve.) |
| | LW | Activated (The St. Louis Blues activated F Brandon Saad from injured reserve.) |
| | C | Called up from minors (The St. Louis Blues recalled F Zack Bolduc from the minors.) |
| | D | Placed on Injured Reserve (The St. Louis Blues placed D Adam Jiricek on the Injured Reserve.) |
| | RW | Placed on Injured Reserve (The St. Louis Blues placed F Simon Robertsson on the Injured Reserve.) |
| | C | Placed on Injured Reserve (The St. Louis Blues placed F Oskar Sundqvist on the Injured Reserve.) |
| | D | Placed on Injured Reserve (The St. Louis Blues placed D Torey Krug on the Injured Reserve.) |
| | LW | Placed on Injured Reserve (The St. Louis Blues placed F Brandon Saad on the Injured Reserve.) |
| | C | Sent to minors (The St. Louis Blues sent F Zachary Bolduc to the minors.) |
| | D | Waived (The St. Louis Blues waived D Corey Schueneman.) |
| | D | Waived (The St. Louis Blues waived D Tyler Tucker.) |
| | C | Sent to minors (The St. Louis Blues sent F Aleksanteri Kaskimaki to the minors.) |
| | D | Sent to minors (The St. Louis Blues sent D Samuel Johannesson to the minors.) |
| | LW | Sent to minors (The St. Louis Blues sent F Hugh McGing to the minors.) |
| | G | Sent to minors (The St. Louis Blues sent G Vadim Zherenko to the minors.) |
| | RW | Sent to minors (The St. Louis Blues sent F Mathias Laferriere to the minors.) |
| | D | Sent to minors (The St. Louis Blues sent D Hunter Skinner to the minors.) |
| | C | Sent to minors (The St. Louis Blues sent F Dalibor Dvorsky to the minors.) |
| | C | Sent to minors (The St. Louis Blues sent F Dylan Peterson to the minors.) |
| | LW | Sent to minors (The St. Louis Blues sent F MacKenzie MacEachern to the minors.) |
| | C | Sent to minors (The St. Louis Blues sent F Zach Dean to the minors.) |
| | D | Called up from minors (The St. Louis Blues recalled D Samuel Johannesson from the minors.) |
| | D | Called up from minors (The St. Louis Blues recalled D Hunter Skinner from the minors.) |
| | C | Called up from minors (The St. Louis Blues recalled F Dylan Peterson from the minors.) |
| | RW | Called up from minors (The St. Louis Blues recalled F Mathias Laferriere from the minors.) |
| | LW | Called up from minors (The St. Louis Blues recalled F Hugh McGing from the minors.) |
| | C | Called up from minors (The St. Louis Blues recalled F Dalibor Dvorsky from the minors.) |
| | LW | Called up from minors (The St. Louis Blues recalled F Mackenzie MacEachern from the minors.) |
| | C | Called up from minors (The St. Louis Blues recalled F Aleksanteri Kaskimaki from the minors.) |
| | C | Sent to minors (The St. Louis Blues sent F Nikita Alexandrov to the minors.) |
| | C | Signed (The St. Louis Blues signed F Nikita Alexandrov to a two-way contract.) |
| | LW | Sent to minors (The St. louis Blues sent F MacKenzie MacEachern to the minors.) |
| | LW | Sent to minors (The St. Luois Blues sent F Hugh McGing to the minors.) |
| | RW | Sent to minors (The St. Louis Blues sent F Mathias Laferriere to the minors.) |
| | D | Sent to minors (The St. Louis Blues sent D Marc-Andre Gaudet to the minors.) |
| | C | Sent to minors (The St. Louis Blues sent F Dalibor Dvorsky to the minors.) |
| | C | Sent to minors (The St. Louis Blues sent F Antoine Dorion to the minors.) |
| | D | Sent to minors (The St. louis Blues sent D Anton Malmstrom to the minors.) |
| | G | Sent to minors (The St. Louis Blues sent G Colten Ellis to the minors.) |
| | C | Sent to minors (The St. Louis Blues sent F Aleksanteri Kaskimaki to the minors.) |
| | LW | Sent to minors (The St. Louis Blues sent F MacKenzie MacEachern to the minors.) |
| | C | Sent to minors (The St. Louis Blues sent F Tanner Dickinson to the minors.) |
| | D | Sent to minors (The St. Louis Blues sent D Samuel Johannesson to the minors.) |
| | D | Sent to minors (The St. Louis Blues sent D Hunter Skinner to the minors.) |
| | D | Sent to minors (The St. Louis Blues sent D Jeremie Biakabutuka to the minors.) |
| | C | Sent to minors (The St. Louis Blues sent F Dylan Peterson to the minors.) |
| | D | Sent to minors (The St. Louis Blues sent D Michael Buchinger to the minors.) |
| | RW | Sent to minors (The St. Louis Blues sent F Marcus Sylvegard to the minors.) |
| | D | Sent to minors (The St. Louis Blues sent D Leo Loof to the minors.) |
| | G | Sent to minors (The St. Louis Blues sent G Will Cranley to the minors.) |
| | C | Released (The St. Louis Blues released F Matthew Peca and returned to the minors.) |
| | C | Released (The St. Louis Blues released F Sam Bitten and returned to the minors.) |
| | D | Released (The St. Louis Blues released D Scott Harrington and returned to the minors.) |
| | G | Released (The St. Louis Blues released G David Tendeck.) |
| | LW | Sent to minors (The St. Louis Blues sent F Juraj Pekarcik to the minors.) |
| | D | Sent to minors (The St. Louis Blues sent D Quinton Burns to the minors.) |
| | C | Sent to minors (The St. Louis Blues sent F Tomas Mrsic to the minors.) |
| | C | Sent to minors (The St. Louis Blues sent F Jakub Stancl to the minors.) |
| | D | Sent to minors (The St. Louis Blues sent D Matthew Mayich to the minors.) |
| | D | Sent to minors (The St. Louis Blues sent D William McIsaac to the minors.) |
| | C | Sent to minors (The St. Louis Blues sent F Adam Jecho to the minors.) |
| | D | Sent to minors (The St. Louis Blues sent D Lukas Fischer to the minors.) |
| | D | Traded (The St. Louis Blues traded the rights to D Paul Fischer to the Edmonton Oilers.) To |
| | LW | Traded (The Edmonton Oilers traded F Dylan Holloway to the St. Louis Blues.) From |
| | D | Traded (The Edmonton Oilers traded D Philip Broberg to the St. Louis Blues) From |
| | D | Signed (The St. Louis Blues signed D Ryan Suter.) |
| | LW | Signed (The St. Louis Blues signed F Pavel Buchnevich.) |
| | RW | Traded (The Ottawa Senators traded F Mathieu Joseph to the St. Louis Blues.) From |
| | D | Signed (The St. Louis Blues signed D Pierre-Olivier Joseph.) |
| | C | Traded (The Dallas Stars traded F Radek Faksa to the St. Louis Blues.) From |
| | D | Signed (The St. Louis Blues signed D Adam Jiricek to a three-year, entry-level contract.) |
| | RW | Signed (The St. Louis Blues signed F Kasperi Kapanen to a standard contact.) |
| | D | Signed (The St. Louis Blues signed D Corey Schueneman to a two-way contract.) |
| | D | Signed (The St. Louis Blues signed D Hunter Skinner to a standard contract.) |
| | RW | Became Unrestricted Free Agent (F Kasperi Kapanen elected free agency.) |
| | LW | Became Unrestricted Free Agent (F Sammy Blais elected free agency.) |
| | D | Became Unrestricted Free Agent (D Josh Jacobs elected free agency.) |
| | D | Became Unrestricted Free Agent (D Calle Rosen elected free agency.) |
| | D | Drafted (The St. Louis Blues drafted D William McIsaac) |
| | D | Drafted (The St. Louis Blues drafted D Colin Ralph) |
| | C | Drafted (The St. Louis Blues drafted C Adam Jecho) |
| | C | Drafted (The St. Louis Blues drafted F Matvei Korotky.) |
| | LW | Drafted (The St. Louis Blues drafted LW Ondrej Kos) |
| | C | Became Unrestricted Free Agent (F Matthew Peca elected free agency.) |
| | C | Traded (The St. Louis Blues traded F Kevin Hayes to the Pittsburgh Penguins) To |
| | D | Drafted (The St. Louis Blues drafted D Lukas Fischer) |
| | C | Drafted (The St. Louis Blues drafted C Tomas Mrsic) |
| | LW | Became Unrestricted Free Agent (F Jakub Vrana elected free agency.) |
| | D | Became Unrestricted Free Agent (D Wyatt Kalynuk elected free agency.) |
| | C | Drafted (The St. Louis Blues drafted F Antoine Dorion.) |
| | D | Became Unrestricted Free Agent (D Marco Scandella elected free agency.) |
| | D | Drafted (The St. Louis Blues drafted D Adam Jiricek) |
| | C | Traded (The Columbus Blue Jackets traded F Alexandre Texier to the St. Loius Blues.) From |
| | D | Contract extended (The St. Louis Blues signed D Scott Perunovich to a contract extension.) |
| | G | Contract extended (The St. Louis Blues signed G Colten Ellis to a one-year, two-way contract extension.) |
| | RW | Contract extended (The St. Louis Blues signed F Mathias Laferriere to a one-year, two-way contract extension.) |
| | LW | Signed (The St. Louis Blues signed F Juraj Pekarcik to an entry-level contract.) |
| | C | Signed (The St. Louis Blues signed F Aleksanteri Kaskimaki to a three-year, two-way entry-level contract.) |
| | LW | Contract extended (The St. Louis Blues signed F Hugh McGing to a two-year, two-way contract extension.) |
| | C | Signed (The St. Louis Blues signed F Otto Stenberg to an entry-level contract. ) |
| | D | Signed (The St. Louis Blues signed D Theo Lindstein to a three-year, entry-level contract.) |
| | C | Signed (The St Louis Blues signed F Otto Stenberg to a three-year, entry-level contract.) |
| | RW | Signed (The St. Louis Blues signed F Simon Robertsson to a three-year, two-way entry-level contract.) |
| | RW | Signed (The St. Louis Blues signed F Marcus Sylvegard to a one-year, entry-level contract.) |
| | D | Signed (The St. Louis Blues signed D Samuel Johannesson to a two-year, entry-level contract.) |
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