| 12 Aug 19 | S. Gómez Sergio Gómez |  Borussia DortmundDOR | → |  HuescaHUE | Loan |
| 11 Aug 19 | Ö. Toprak Ömer Toprak | Borussia DortmundDOR | → |  Werder BremenWER | Loan |
| 09 Aug 19 | S. Kagawa Shinji Kagawa | Borussia DortmundDOR | → |  Real ZaragozaZAR | Undisclosed |
| 09 Aug 19 | M. Philipp Maximilian Philipp | Borussia DortmundDOR | → |  Dinamo MoscowDMO | Undisclosed |
| 31 Jul 19 | A. Schürrle André Schürrle | Borussia DortmundDOR | → |  Spartak MoscowSPM | Loan |
| 16 Jul 19 | A. Diallo Abdou Diallo | Borussia DortmundDOR | → |  Paris Saint-Germain PSG | Undisclosed |
| 16 Jul 19 | A. Diallo Abdou Diallo | Borussia DortmundDOR | → | Paris Saint-Germain PSG | Undisclosed |
| 08 Jul 19 | H. Bockhorn Herbert Bockhorn | Borussia DortmundDOR | → |  Huddersfield TownHUD | Undisclosed |
| 08 Jul 19 | H. Bockhorn Herbert Bockhorn | Borussia DortmundDOR | → | Huddersfield TownHUD | Undisclosed |
| 02 Jul 19 | F. Passlack Felix Passlack | Borussia DortmundDOR | → |  Fortuna SittardFOR | Loan |
| 02 Jul 19 | F. Passlack Felix Passlack | Borussia DortmundDOR | → | Fortuna SittardFOR | Loan |
| 01 Jul 19 | T. Hazard Thorgan Hazard |  Borussia MonchengladbachMON | → | Borussia DortmundDOR | Undisclosed |
| 01 Jul 19 | M. Morey Mateu Morey |  BarcelonaBAR | → | Borussia DortmundDOR | Free |
| 01 Jul 19 | A. Isak Alexander Isak | Borussia DortmundDOR | → |  Real SociedadRSO | Undisclosed |
| 01 Jul 19 | M. Hummels Mats Hummels |  Bayer LeverkusenLEV | → | Borussia DortmundDOR | Undisclosed |
| 01 Jul 19 | A. Isak Alexander Isak | Borussia DortmundDOR | → | Real SociedadRSO | Undisclosed |
| 01 Jul 19 | N. Schulz Nico Schulz |  TSG HoffenheimHOF | → | Borussia DortmundDOR | Undisclosed |
| 01 Jul 19 | L. Kilian Luca Kilian | Borussia DortmundDOR | → |  SC Paderborn 07PAD | Free |
| 01 Jul 19 | M. Morey Mateu Morey | BarcelonaBAR | → | Borussia DortmundDOR | Free |
| 01 Jul 19 | J. Brandt Julian Brandt | Bayer LeverkusenLEV | → | Borussia DortmundDOR | Undisclosed |
| 31 Jan 19 | J. Toljan Jeremy Toljan | Borussia DortmundDOR | → |  CelticCEL | Loan |
| 31 Jan 19 | S. Kagawa Shinji Kagawa | Borussia DortmundDOR | → |  BesiktasBES | Loan |
| 31 Jan 19 | J. Toljan Jeremy Toljan | Borussia DortmundDOR | → | CelticCEL | Loan |
| 25 Jan 19 | A. Isak Alexander Isak | Borussia DortmundDOR | → |  Willem IIWIL | Loan |
| 25 Jan 19 | A. Isak Alexander Isak | Borussia DortmundDOR | → | Willem IIWIL | Loan |
| 14 Jan 19 | L. Balerdi Leonardo Balerdi |  Boca JuniorsCABJ | → | Borussia DortmundDOR | Undisclosed |
| 14 Jan 19 | L. Balerdi Leonardo Balerdi | Boca JuniorsCABJ | → | Borussia DortmundDOR | Undisclosed |
| 07 Jan 19 | T. Matthews Tashreeq Matthews | Borussia DortmundDOR | → |  FC UtrechtUTR | Loan |
| 07 Jan 19 | T. Matthews Tashreeq Matthews | Borussia DortmundDOR | → | FC UtrechtUTR | Loan |
| 02 Jan 19 | C. Pulisic Christian Pulisic | Borussia DortmundDOR | → |  ChelseaCHE | 64000000 |
| 02 Jan 19 | C. Pulisic Christian Pulisic | Borussia DortmundDOR | → | ChelseaCHE | 64000000 |
| 02 Jan 19 | C. Pulisic Christian Pulisic | ChelseaCHE | → | Borussia DortmundDOR | Loan |
| 02 Jan 19 | C. Pulisic Christian Pulisic | ChelseaCHE | → | Borussia DortmundDOR | Loan |
| 01 Jan 19 | P. Alcácer Paco Alcácer | BarcelonaBAR | → | Borussia DortmundDOR | 23000000 |
| 01 Jan 19 | S. Rode Sebastian Rode | Borussia DortmundDOR | → |  Eintracht FrankfurtSGE | Loan |
| 01 Jan 19 | P. Alcácer Paco Alcácer | BarcelonaBAR | → | Borussia DortmundDOR | 23000000 |