Leyton Orient: every transfer in and out, fees paid and earned, squad market value and €3.5m earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-08-24 | Tyreeq Bakinson | Leyton Orient | Plymouth | Loan |
| 2026-08-11 | Alfie Gilchrist | West Bromwich Albion | Leyton Orient | Loan |
| 2026-08-10 | Nicholas Oyekunle | Southampton U21 | Leyton Orient | Loan |
| 2026-08-04 | Dom Ballard | Leyton Orient | Bristol City | Free |
| 2026-07-10 | Isaac Hayden | Queens Park Rangers | Leyton Orient | Free |
| 2026-07-09 | Josh Koroma | Leyton Orient | Chesterfield | Loan |
| 2026-07-04 | Azeem Abdulai | Leyton Orient | Hibernian FC | Free |
| 2026-07-03 | Nathan Baxter | Watford FC | Leyton Orient | Free |
| 2026-07-02 | Jack Simpson | Leyton Orient | Chesterfield | Free |
| 2026-07-01 | Fin Stevens | FC St. Pauli | Leyton Orient | Free |
| 2026-07-01 | Tony Springett | Norwich City | Leyton Orient | Free |
| 2026-07-01 | Armando Dobra | Chesterfield | Leyton Orient | Free |
| 2026-07-01 | Daniel Happe | Leyton Orient | Aberdeen FC | Free |
| 2026-07-01 | Sonny Perkins | Leyton Orient | Wigan Athletic | Free |
| 2026-07-01 | Tom James | Leyton Orient | Bristol Rovers | Free |
| 2026-02-02 | Dylan Levitt | Hibernian FC | Leyton Orient | Free |
| 2026-02-02 | Will Dennis | Bournemouth | Leyton Orient | Loan |
| 2026-02-02 | James Morris | Watford FC | Leyton Orient | Free |
| 2026-02-02 | Tobi Oluwayemi | Celtic II | Leyton Orient | Free |
| 2026-02-02 | Omar Beckles | Leyton Orient | Gillingham | Free |