| Date | Player | From | To | Amount |
|---|---|---|---|---|
| 06 Nov 20 | AMXMON | CXXCOR | Undisclosed | |
| 06 Nov 20 | AMXMON | CXXCOR | Undisclosed | |
| 05 Oct 20 | Antonio Barreca | AMXMON | FXXFIO | Loan |
| 05 Oct 20 | Arthur Zagre | AMXMON | DFXDIJO | Loan |
| 05 Oct 20 | Antonio Barreca | AMXMON | FXXFIO | Loan |
| 05 Oct 20 | Giulian Biancone | AMXMON | CBKCBK | Loan |
| 02 Oct 20 | AMXMON | FBXBAS | Loan | |
| 29 Sept 20 | AMXMON | RAXRIO | Loan | |
| 28 Sept 20 | Keita Baldé | AMXMON | SXXSAM | Loan |
| 28 Sept 20 | Keita Baldé | AMXMON | SXXSAM | Loan |
| 25 Sept 20 | Gil Dias | AMXMON | FFXFAM | Loan |
| 25 Sept 20 | Florentino Luís | BXXBEN | AMXMON | Loan |
| 18 Sept 20 | Julian Pollersbeck | HSXHSV | AMXMON | 250000 |
| 17 Sept 20 | Jordi Mboula | AMXMON | MXXMLL | Undisclosed |
| 11 Sept 20 | Vito Mannone | XXX | AMXMON | Free |
| 11 Sept 20 | Adama Noss Traoré | AMXMON | HXXHAY | Undisclosed |
| 11 Sept 20 | Jean Marcelin | AMXMON | CBKCBK | Loan |
| 10 Sept 20 | Nacer Chadli | AMXMON | IBXIBFK | Undisclosed |
| 06 Sept 20 | Adrien Bongiovanni | AMXMON | FDBDBO | Loan |
| 02 Sept 20 | Kevin Volland | BLXLEV | AMXMON | Undisclosed |
| 02 Sept 20 | Kevin Volland | BLXLEV | AMXMON | Undisclosed |
| 01 Sept 20 | Kamil Glik | AMXMON | BXXBEN | Undisclosed |
| 27 Aug 20 | Caio Henrique | AMXATL | AMXMON | Undisclosed |
| 27 Aug 20 | Caio Henrique | AMXATL | AMXMON | Undisclosed |
| 26 Aug 20 | Jonathan Panzo | AMXMON | DFXDIJO | Undisclosed |
| 24 Aug 20 | Anthony Musaba | AMXMON | CBKCBK | Loan |
| 21 Aug 20 | Julien Serrano | AMXMON | LXXLIV | Loan |
| 21 Aug 20 | Julien Serrano | AMXMON | LXXLIV | Loan |
| 13 Aug 20 | Lyle Foster | AMXMON | GXXGUI | 1200000 |
| 07 Aug 20 | Axel Disasi | SDRREIM | AMXMON | Undisclosed |
| 08 Jul 20 | Benjamin Henrichs | AMXMON | RLXRBL | Loan |
| 08 Jul 20 | Benjamin Henrichs | AMXMON | RLXRBL | Loan |
| 01 Jul 20 | Anthony Musaba | NNXNEC | AMXMON | Undisclosed |
| 30 Jun 20 | Romain Faivre | AMXMON | BXXBRES | Undisclosed |
| 08 Jun 20 | Kevin N'Doram | AMXMON | MXXMETZ | Undisclosed |
| 31 Jan 20 | Gil Dias | AMXMON | GXXGCF | Loan |
| 31 Jan 20 | Gil Dias | AMXMON | GXXGCF | Loan |
| 31 Jan 20 | Adrien Bongiovanni | AMXMON | ABXAS Beziers | Loan |
| 30 Jan 20 | Jean Marcelin | AAXAUX | AMXMON | Undisclosed |
| 30 Jan 20 | Bruno Guimarães | AXXCAP | AMXMON | 20000000 |
| 30 Jan 20 | Bruno Guimarães | AXXCAP | AMXMON | 20000000 |
| 29 Jan 20 | Radoslaw Majecki | LWXLegia Warsaw | AMXMON | Undisclosed |
| 29 Jan 20 | Youssouf Fofana | SXXSTRA | AMXMON | Undisclosed |
| 29 Jan 20 | Gabriel Boschilia | AMXMON | IXXINT | Undisclosed |
| 29 Jan 20 | Jordi Mboula | AMXMON | HXXHUE | Loan |
| 29 Jan 20 | Radoslaw Majecki | AMXMON | LWXLegia Warsaw | Loan |
| 29 Jan 20 | Aurélien Tchouaméni | BXXBOR | AMXMON | Undisclosed |
| 29 Jan 20 | Gabriel Boschilia | AMXMON | IXXINT | Undisclosed |
| 04 Jan 20 | Henry Onyekuru | AMXMON | GXXGAL | Loan |
| 03 Jan 20 | Strahinja Pavlovic | AMXMON | PBXPartizan Belgrade | Loan |
| 03 Jan 20 | Strahinja Pavlovic | PBXPartizan Belgrade | AMXMON | Undisclosed |