| 2026-10-05 | Sabino | Oliveirense → Al Arabi SC | Free agent |
| 2026-09-28 | André Almeida | Academico Viseu → Oliveirense | Free agent |
| 2026-09-21 | Nuno Namora | Oliveirense → Felgueiras 1932 | Free agent |
| 2026-09-09 | Unai Pérez | Torreense → Oliveirense | Free agent |
| 2026-09-08 | Filipe Alves | Oliveirense → Filipe Alves | End of career |
| 2026-08-29 | N. Greis | Oliveirense → Hapoel Acre | Free agent |
| 2026-08-20 | João Silva | Oliveirense → Al Jandal | Free agent |
| 2026-08-13 | K. Nagata | FC Porto B → Oliveirense | Transfer |
| 2026-08-12 | A. Lopes | Oliveirense → Felgueiras 1932 | Transfer |
| 2026-08-06 | G. Silva | Sporting CP B → Oliveirense | Free agent |
| 2026-07-31 | D. Pereira | Oliveirense → Leça | Free agent |
| 2026-07-30 | R. Assuncao | Torreense → Oliveirense | Free agent |
| 2026-07-30 | R. Rei | Torreense → Oliveirense | - |
| 2026-07-28 | R. Marques | Torreense (U23) → Oliveirense | Loan |
| 2026-07-27 | João Sérgio | Beroe → Oliveirense | Transfer |
| 2026-07-26 | R. Marques | Torreense (U23) → Oliveirense | - |
| 2026-07-23 | Pedro Martelo | Oliveirense → Teuta Durrës | Free agent |
| 2026-07-23 | Théo Fonseca | Fafe → Oliveirense | Free agent |
| 2026-07-21 | João Felix | Brusque → Oliveirense | Free agent |
| 2026-07-20 | Bura | Oliveirense → Atlético CP | Free agent |
| 2026-07-15 | T. Keating | Oliveirense → Maritimo | Transfer |
| 2026-07-14 | T. Keating | Oliveirense → Keating Tyler | Free agent |
| 2026-07-14 | T. Keating | Oliveirense → Marítimo (U23) | - |
| 2026-07-14 | Y. Rodriguez | Internacional Palmira → Oliveirense | Transfer |
| 2026-07-09 | Sota Matsunaga | Urawa → Oliveirense | Transfer |
| 2026-07-03 | Joanderson | Oliveirense → Olancho | Free agent |
| 2026-06-30 | Amadou Diallo | Oliveirense → Skenderbeu Korce | Free agent |
| 2026-06-30 | Lucas Henrique | Oliveirense → AD Marco 09 | Free agent |
| 2026-06-30 | Kiko Felix | Sanjoanense → Oliveirense | Free agent |
| 2026-06-30 | Vasco Braga | Fafe → Oliveirense | Free agent |
| 2026-06-30 | D. Sancho | Beira-Mar → Oliveirense | Free agent |
| 2026-06-30 | Joao Tavares | Ipatinga → Oliveirense | Free agent |
| 2026-06-30 | Sérgio Dutra | Santa Clara (U23) → Oliveirense | Free agent |
| 2026-06-30 | J. Daniel | Trofense → Oliveirense | Free agent |
| 2026-06-30 | Gonçalo Loureiro | Spartakos Kitiou → Oliveirense | - |
| 2026-06-29 | Joanderson | Oliveirense → Olancho | Free agent |
| 2026-06-29 | K. Nagata | Oliveirense → FC Porto B | Return from loan |
| 2026-06-29 | F. Ondoa | Oliveirense → Estoril | Return from loan |
| 2026-06-29 | Douglas Borel | Oliveirense → Santa Clara | Return from loan |
| 2026-06-29 | Gustavao | Oliveirense → Атлетик Клуб | Return from loan |
| 2026-06-29 | João Adriano | Oliveirense → Атлетик Клуб | Return from loan |
| 2026-06-29 | Tiago Brito | Oliveirense → Estoril | Return from loan |
| 2026-06-29 | João Silva | Oliveirense → Al Jandal | Free agent |
| 2026-06-29 | I. Dioh | Oliveirense → Dioh Idrissa | Free agent |
| 2026-06-29 | Y. Rodriguez | Oliveirense → Internacional Palmira | Return from loan |
| 2026-02-01 | Pedro Jesus | Oliveirense → Academica | Free agent |
| 2026-02-01 | Y. Rodriguez | Internacional Palmira → Oliveirense | Loan |
| 2026-01-30 | K. Onohara | Blaublitz Akita → Oliveirense | Free agent |
| 2026-01-27 | Tiago Brito | Estoril → Oliveirense | Loan |
| 2026-01-21 | K. Nagata | FC Porto B → Oliveirense | Loan |