| 1 | Thu 22 Aug | 142-1 v HäckenHäcken 1-2 1 FC Heidenheim | UEFA Europa Conference League Play-off |
| 2 | Sun 25 Aug | 142-0 v FC St PauliFC St Pauli 0-2 1 FC Heidenheim | German Bundesliga |
| 3 | Thu 29 Aug | 143-2 v Häcken1 FC Heidenheim 3-2 Häcken | UEFA Europa Conference League Play-off |
| 4 | Sun 1 Sep | 144-0 v FC Augsburg1 FC Heidenheim 4-0 FC Augsburg | German Bundesliga |
| 5 | Sat 21 Sep | 140-3 v SC Freiburg1 FC Heidenheim 0-3 SC Freiburg | German Bundesliga |
| 6 | Sat 28 Sep | 142-0 v Mainz 05Mainz 05 0-2 1 FC Heidenheim | German Bundesliga |
| 7 | Thu 3 Oct | 142-1 v Olimpija Ljubljana1 FC Heidenheim 2-1 Olimpija Ljubljana | UEFA Europa Conference League Matchday 1 |
| 8 | Sun 6 Oct | 140-1 v RB Leipzig1 FC Heidenheim 0-1 RB Leipzig | German Bundesliga |
| 9 | Sun 27 Oct | 140-0 v 1899 Hoffenheim1 FC Heidenheim 0-0 1899 Hoffenheim | German Bundesliga |
| 10 | Sat 2 Nov | 140-1 v Holstein KielHolstein Kiel 1-0 1 FC Heidenheim | German Bundesliga |
| 11 | Thu 7 Nov | 142-0 v Heart of MidlothianHeart of Midlothian 0-2 1 FC Heidenheim | UEFA Europa Conference League Matchday 3 |
| 12 | Sun 10 Nov | 141-3 v VfL Wolfsburg1 FC Heidenheim 1-3 VfL Wolfsburg | German Bundesliga |
| 13 | Thu 28 Nov | 140-2 v Chelsea1 FC Heidenheim 0-2 Chelsea | UEFA Europa Conference League Matchday 4 |
| 14 | Sun 1 Dec | 140-4 v Eintracht Frankfurt1 FC Heidenheim 0-4 Eintracht Frankfurt | German Bundesliga |
| 15 | Sat 7 Dec | 142-4 v Bayern MunichBayern Munich 4-2 1 FC Heidenheim | German Bundesliga |
| 16 | Thu 12 Dec | 141-3 v İstanbul Başakşehirİstanbul Başakşehir 3-1 1 FC Heidenheim | UEFA Europa Conference League Matchday 5 |
| 17 | Thu 19 Dec | 141-1 v St Gallen1 FC Heidenheim 1-1 St Gallen | UEFA Europa Conference League Matchday 6 |
| 18 | Sat 18 Jan | 140-2 v FC St Pauli1 FC Heidenheim 0-2 FC St Pauli | German Bundesliga |
| 19 | Sat 25 Jan | 141-2 v FC AugsburgFC Augsburg 2-1 1 FC Heidenheim | German Bundesliga |
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