HB H. Brown | Out | 2026-04-02 | Return from loan | GT Gainsborough Trinity GAI | GR Grimsby GRI |
| HBH. Brown | In | 2026-01-27 | Loan | GRGrimsby GRI | GTGainsborough Trinity GAI |
JL Jack Leckie | In | 2026-01-09 | Loan | AT Alfreton Town ALF | GTGainsborough Trinity GAI |
OF Offler | In | 2026-01-04 | Free agent | ST Stamford STA | GTGainsborough Trinity GAI |
CP C. Parks | Out | 2026-01-02 | Return from loan | GTGainsborough Trinity GAI | LI Lincoln LNC |
TW T. Williams | In | 2025-12-31 | Loan | KT King's Lynn Town KIN | GTGainsborough Trinity GAI |
WL W. Lancaster | Out | 2025-11-27 | Free agent | GTGainsborough Trinity GAI | AF AFC Fylde FYL |
| CPC. Parks | In | 2025-11-24 | Loan | LILincoln LNC | GTGainsborough Trinity GAI |
AH Archie Howard | Out | 2025-11-19 | Free agent | GTGainsborough Trinity GAI | HC Hull City HUL |
| AHArchie Howard | Out | 2025-11-07 | Free agent | GTGainsborough Trinity GAI | — |
| AHArchie Howard | Out | 2025-11-07 | Free agent | GTGainsborough Trinity GAI | HCHull City HUL |
JK Jakub Kruszynski | Out | 2025-11-02 | Return from loan | GTGainsborough Trinity GAI | MT Mansfield Town MAN |
| AHArchie Howard | In | 2025-10-31 | Free agent | GTGainsborough Trinity GAI | GTGainsborough Trinity GAI |
BC B. Conway | In | 2025-10-30 | Return from loan | CT Cleethorpes Town | GTGainsborough Trinity GAI |
JA Josh Ayres | Out | 2025-10-05 | Return from loan | GTGainsborough Trinity GAI | RO Rotherham ROT |
| JKJakub Kruszynski | In | 2025-10-02 | Loan | MTMansfield Town MAN | GTGainsborough Trinity GAI |
| JAJosh Ayres | In | 2025-09-29 | Loan | RORotherham ROT | GTGainsborough Trinity GAI |
| BCB. Conway | Out | 2025-09-18 | Loan | GTGainsborough Trinity GAI | CTCleethorpes Town |
KJ Kian Johnson | Out | 2025-09-12 | Transfer | GTGainsborough Trinity GAI | SC Scunthorpe SCU |
| KJKian Johnson | Out | 2025-09-11 | Transfer | GTGainsborough Trinity GAI | SCScunthorpe SCU |
DC D. Cogill | Out | 2025-07-01 | Free Transfer | GTGainsborough Trinity GAI | WT Worksop Town |
AC A. Crookes | In | 2025-06-30 | Free agent | YO York YOR | GTGainsborough Trinity GAI |
PC Paul Cooper | Out | 2025-06-30 | Free agent | GTGainsborough Trinity GAI | — |
JB Jon Beeden | In | 2025-06-30 | - | CT Chippenham Town CHI | GTGainsborough Trinity GAI |
FM F. Mulhern | In | 2025-06-30 | Free agent | SA Scarborough Athletic SCA | GTGainsborough Trinity GAI |
DH D. Howe | Out | 2025-06-30 | Free agent | GTGainsborough Trinity GAI | SCScunthorpe SCU |
JM J. Margetts | In | 2025-06-30 | Free agent | KTKing's Lynn Town KIN | GTGainsborough Trinity GAI |
HB H. Beeden | In | 2025-06-30 | Transfer | LC Lancaster City | GTGainsborough Trinity GAI |
| DHD. Howe | Out | 2025-06-29 | Free agent | GTGainsborough Trinity GAI | SCScunthorpe SCU |
DS D. Southwell | Out | 2025-06-29 | Free agent | GTGainsborough Trinity GAI | GB Grimsby Borough |
| DCD. Cogill | Out | 2025-06-29 | Free agent | GTGainsborough Trinity GAI | WTWorksop Town |
DR D. Robson | In | 2025-03-27 | Free agent | ATAlfreton Town ALF | GTGainsborough Trinity GAI |
SF S. Fishburn | Out | 2025-02-16 | Return from loan | GTGainsborough Trinity GAI | SCScunthorpe SCU |
| SFS. Fishburn | In | 2025-01-16 | Loan | SCScunthorpe SCU | GTGainsborough Trinity GAI |
DD D. Devine | Out | 2024-12-05 | Free agent | GTGainsborough Trinity GAI | LI Liversedge |
| PCPaul Cooper | In | 2024-11-24 | - | BU Buxton BUX | GTGainsborough Trinity GAI |
CD C. Durose | In | 2024-11-21 | Free agent | MT Matlock Town MAT | GTGainsborough Trinity GAI |
JD J. Dyer | Out | 2024-10-21 | N/A | GTGainsborough Trinity GAI | BA Barnsley BAR |
| JDJ. Dyer | In | 2024-09-20 | Loan | BABarnsley BAR | GTGainsborough Trinity GAI |
OB O. Battersby | Out | 2024-09-12 | Free agent | GTGainsborough Trinity GAI | CTCleethorpes Town |
AB A. Braithwaite | In | 2024-08-10 | Free | GRGrimsby GRI | GTGainsborough Trinity GAI |
DW Dylan Wharton | In | 2024-08-07 | Free agent | SU Sheffield Utd SHE | GTGainsborough Trinity GAI |
GS G. Sani | In | 2024-08-06 | Free | BT Bridlington Town | GTGainsborough Trinity GAI |
AS A. Simpson | In | 2024-08-01 | Free | SA Salisbury | GTGainsborough Trinity GAI |
EE E. Essel | In | 2024-07-23 | Free | GRGrimsby GRI | GTGainsborough Trinity GAI |
JR J. Render | In | 2024-07-01 | Free | — | GTGainsborough Trinity GAI |
LB L. Butroid | In | 2024-07-01 | Free | FF Farsley Celtic FC | GTGainsborough Trinity GAI |
JH J. Helliwell | In | 2024-07-01 | Free | WA Wakefield AFC | GTGainsborough Trinity GAI |
HD H. Douglas | Out | 2024-07-01 | N/A | GTGainsborough Trinity GAI | RORotherham ROT |
| DHD. Howe | In | 2024-07-01 | Free | IT Ilkeston Town ILK | GTGainsborough Trinity GAI |
