| 17 Oct 19 | G. Hooper Gary Hooper |  Sheffield WednesdaySHW | → |  Wellington Phoenix FCWEL | Free |
| 17 Oct 19 | G. Hooper Gary Hooper | Sheffield WednesdaySHW | → | Wellington Phoenix FCWEL | Free |
| 16 Oct 19 | N. Müller Nicolai Müller |  Eintracht FrankfurtSGE | → |  Western Sydney WanderersWSW | Free |
| 16 Oct 19 | N. Müller Nicolai Müller | Eintracht FrankfurtSGE | → | Western Sydney WanderersWSW | Free |
| 28 Sept 19 | B. Berisha Besart Berisha |  Sanfrecce HiroshimaSAN | → |  Western UnitedWTU | Free |
| 27 Sept 19 | J. Meredith James Meredith |  MillwallMIL | → |  Perth GloryPER | Free |
| 27 Sept 19 | J. Meredith James Meredith | MillwallMIL | → | Perth GloryPER | Free |
| 19 Sept 19 | M. Basha Migjen Basha |  ArisARI | → |  Melbourne VictoryMVC | Free |
| 17 Sept 19 | B. Burns Bobby Burns |  Heart of MidlothianHOM | → |  Newcastle JetsNEW | Loan |
| 17 Sept 19 | B. Burns Bobby Burns | Heart of MidlothianHOM | → | Newcastle JetsNEW | Loan |
| 12 Sept 19 | A. Traoré Adama Traoré |  GoztepeGOZ | → | Melbourne VictoryMVC | Free |
| 02 Sept 19 | J. Poulsen Jakob Poulsen |  FC MidtjyllandMIDT | → | Melbourne VictoryMVC | Free |
| 20 Aug 19 | K. Dobras Kristijan Dobras |  SC Rheindorf AltachSCR | → | Melbourne VictoryMVC | Free |
| 25 Jul 19 | A. Nabbout Andrew Nabbout |  Urawa Red DiamondsURA | → | Melbourne VictoryMVC | Undisclosed |
| 24 Jul 19 | T. Antonis Terry Antonis | Melbourne VictoryMVC | → | SBXSuwon BluewingsSuwon Bluewings | Undisclosed |
| 23 Jul 19 | R. Kruse Robbie Kruse |  VfL BochumBOC | → | Melbourne VictoryMVC | Free |
| 09 Jul 19 | M. Cabrera Marcelo Cabrera |  WanderersWAN | → |  Melbourne City FCMCY | Undisclosed |
| 05 Jul 19 | R. McGree Riley McGree |  Club BruggeBRUG | → |  Adelaide UnitedADE | Undisclosed |
| 04 Jul 19 | A. Cáceres Anthony Cáceres |  Manchester CityMNC | → |  Sydney FCSYD | Free |
| 04 Jul 19 | A. Cáceres Anthony Cáceres | Manchester CityMNC | → | Sydney FCSYD | Free |
| 03 Jul 19 | R. McGowan Ryan McGowan |  Bradford CityBRD | → | Sydney FCSYD | Free |
| 02 Jul 19 | K. Baccus Kearyn Baccus | Melbourne City FCMCY | → |  Kaizer ChiefsKAI | Undisclosed |
| 02 Jul 19 | A. Baumjohann Alexander Baumjohann | Western Sydney WanderersWSW | → | Sydney FCSYD | Free |
| 01 Jul 19 | M. Gillesphey Macaulay Gillesphey |  Carlisle UnitedCAR | → |  Brisbane RoarBRR | Free |
| 01 Jul 19 | T. Aldred Tom Aldred |  MotherwellMOT | → | Brisbane RoarBRR | Free |
| 01 Jul 19 | J. O'Shea Jay O'Shea |  BuryBURY | → | Brisbane RoarBRR | Free |
| 01 Jul 19 | T. Aldred Tom Aldred | MotherwellMOT | → | Brisbane RoarBRR | Free |
| 30 Jun 19 | S. Neville Scott Neville | Perth GloryPER | → | Brisbane RoarBRR | Free |
| 27 Jun 19 | B. Inman Bradden Inman |  RochdaleROCH | → | Brisbane RoarBRR | Free |
| 27 Jun 19 | A. O'Neill Aiden O'Neill |  BurnleyBUR | → | Brisbane RoarBRR | Loan |
| 27 Jun 19 | A. O'Neill Aiden O'Neill | BurnleyBUR | → | Brisbane RoarBRR | Loan |
| 25 Jun 19 | D. Ingham Dane Ingham | Brisbane RoarBRR | → | Perth GloryPER | Free |
| 25 Jun 19 | N. D'Agostino Nicholas D'Agostino | Brisbane RoarBRR | → | Perth GloryPER | Free |
| 25 Jun 19 | A. Amadi-Holloway Aaron Amadi-Holloway |  Shrewsbury TownSHR | → | Brisbane RoarBRR | Undisclosed |
| 24 Jun 19 | R. O'Donovan Roy O'Donovan | Newcastle JetsNEW | → | Brisbane RoarBRR | Free |
| 20 Jun 19 | J. Davidson Jason Davidson | Perth GloryPER | → | UHFUlsan Hyundai FCUlsan Hyundai FC | Undisclosed |
| 18 Jun 19 | R. Krishna Roy Krishna | Wellington Phoenix FCWEL | → |  ATKATK | Free |
| 17 Jun 19 | C. Noone Craig Noone |  Bolton WanderersBOL | → | Melbourne City FCMCY | Free |
| 17 Jun 19 | C. Noone Craig Noone | Bolton WanderersBOL | → | Melbourne City FCMCY | Free |
| 17 Jun 19 | A. Durante Andrew Durante | Wellington Phoenix FCWEL | → | WUXWestern UnitedWestern United | Free |
| 17 Jun 19 | L. DeVere Luke DeVere | Brisbane RoarBRR | → | Wellington Phoenix FCWEL | Free |
| 12 Jun 19 | J. Sotirio Jaushua Sotirio | Western Sydney WanderersWSW | → | Wellington Phoenix FCWEL | Free |
| 15 May 19 | P. Schwegler Pirmin Schwegler |  Hannover 96HAN | → | Western Sydney WanderersWSW | Free |
| 15 May 19 | P. Schwegler Pirmin Schwegler | Hannover 96HAN | → | Western Sydney WanderersWSW | Free |
| 02 Jan 19 | C. Sheridan Cillian Sheridan | JBXJagiellonia BialystokJagiellonia Bialystok | → | Wellington Phoenix FCWEL | Free |
| 01 Jan 19 | A. Cáceres Anthony Cáceres | Manchester CityMNC | → | Sydney FCSYD | Loan |
| 01 Jan 19 | A. Cáceres Anthony Cáceres | Manchester CityMNC | → | Sydney FCSYD | Loan |