| 2026-09-30 | S. Ayolie | Stevenage → Stevenage | Raise |
| 2026-09-24 | B. Lubala | Stevenage → Colchester | Free agent |
| 2026-09-14 | Wanya Marçal | Leicester → Stevenage | Free agent |
| 2026-09-07 | Joe Knight | Stevenage → Sutton Utd | Loan |
| 2026-09-06 | M. Smith | Wigan → Stevenage | Free agent |
| 2026-08-31 | D. Butler | Stevenage → Swindon Town | Loan |
| 2026-08-31 | F. Marschall | Stevenage → Millwall | Transfer |
| 2026-08-31 | J. Taylor | Stevenage → Exeter City | Loan |
| 2026-08-31 | T. Setford | Άρσεναλ → Stevenage | Loan |
| 2026-08-31 | K. Casey | West Ham → Stevenage | Loan |
| 2026-08-31 | T. Turhan | Başakşehir → Stevenage | Loan |
| 2026-08-30 | J. Reid | Stevenage → Reading | Transfer |
| 2026-08-30 | F. Marschall | Stevenage → Millwall | Transfer |
| 2026-08-29 | J. Reid | Stevenage → Reading | Transfer |
| 2026-08-25 | J. Malcolm | Stevenage → York | Loan |
| 2026-08-17 | M. Mellon | Burnley → Stevenage | Transfer |
| 2026-08-16 | M. Mellon | Burnley → Stevenage | Transfer |
| 2026-08-05 | F. Norris | Stevenage → Bishop's Stortford | Loan |
| 2026-08-04 | D. Barden | Norwich → Stevenage | Free agent |
| 2026-08-03 | T. Simpson | Stevenage → Port Vale | Free agent |
| 2026-08-03 | D. Barden | Norwich → Stevenage | Free agent |
| 2026-08-02 | T. Simpson | Stevenage → Port Vale | Free agent |
| 2026-07-24 | T. Vancooten | Burton Albion → Stevenage | - |
| 2026-07-23 | T. Vancooten | Burton Albion → Stevenage | - |
| 2026-06-30 | C. Goode | Stevenage → Milton Keynes Dons | Free agent |
| 2026-06-30 | D. Sweeney | Stevenage → AFC Wimbledon | Free agent |
| 2026-06-30 | T. Ashby-Hammond | Stevenage → Barnet | Free agent |
| 2026-06-30 | J. Magennis | Exeter City → Stevenage | Free agent |
| 2026-06-30 | H. White | Stevenage → Plymouth | Free agent |
| 2026-06-30 | O. Sanderson | Fulham → Stevenage | Free agent |
| 2026-06-30 | T. Taylor | Charlton → Stevenage | Free agent |
| 2026-06-29 | D. Sweeney | Stevenage → AFC Wimbledon | Free agent |
| 2026-06-29 | T. Ashby-Hammond | Stevenage → Barnet | Free agent |
| 2026-06-29 | T. Simpson | Stevenage → Simpson Tyreece | Free agent |
| 2026-06-29 | F. Norris | Bishop's Stortford → Stevenage | Return from loan |
| 2026-06-29 | M. Phillips | Stevenage → Phillips Matt | Free agent |
| 2026-06-29 | Mathaeus Roberts | Stevenage → Roberts Mathaeus | Free agent |
| 2026-06-29 | Ellis Bates | Stevenage → Bates Ellis | Free agent |
| 2026-06-29 | Ellis Bates | Stevenage → Aveley | Free agent |
| 2026-06-29 | B. Lubala | Stevenage → Lubala Beryly | Free agent |
| 2026-06-29 | B. Lubala | Stevenage → Colchester | Free agent |
| 2026-06-29 | G. Yahyai | Stevenage → Charlton | Return from loan |
| 2026-06-29 | J. Magennis | Exeter City → Stevenage | Free agent |
| 2026-06-29 | H. White | Stevenage → Plymouth | Free agent |
| 2026-05-30 | J. Malcolm | Barrow → Stevenage | Return from loan |
| 2026-05-30 | H. Cornick | Stevenage → Bristol City | Return from loan |
| 2026-03-29 | F. Norris | Bishop's Stortford → Stevenage | Return from loan |
| 2026-02-12 | M. Phillips | Oxford United → Stevenage | Free agent |
| 2026-02-11 | F. Norris | Stevenage → Bishop's Stortford | Loan |
| 2026-02-01 | R. Doherty | Stevenage → Ipswich Town (U21) | - |
| 2026-01-31 | M. Phillips | Oxford United → Stevenage | Free agent |
| 2026-01-30 | Joe Knight | Brighton → Stevenage | Transfer |
| 2026-01-28 | J. Malcolm | Stevenage → Barrow | Loan |
| 2026-01-27 | J. Taylor | Sutton Utd → Stevenage | Transfer |
| 2026-01-16 | H. Cornick | Bristol City → Stevenage | Loan |
| 2026-01-15 | J. Young | Stevenage → ST Mirren | Transfer |
| 2026-01-12 | N. Freeman | Stevenage → Shrewsbury | Free agent |