| G.H.Kirke Limited | Agriculture & fishing | 1965 |
| G.M. Build & Maintenance Limited | Construction | 2017 |
| G.P. Security Services Limited | Administrative & support | 1997 |
| G.T.Interiors (Lincs) Limited | Construction | 2006 |
| G.W. Bayes Limited | Professional & scientific | 1976 |
| G8MO Ltd | Health & social care | 2022 |
| GA Business Services Limited | Professional & scientific | 2019 |
| Gabiga Transport Ltd | Wholesale & retail | 2017 |
| Gabriel Illek Limited | Other services | 2017 |
| Gagner SA VIE Ltd | Wholesale & retail | 2023 |
| GAK Construction Ltd | Construction | 2017 |
| Gala Paws Ltd | Manufacturing | 2025 |
| Gala Property Ltd | Real estate | 2021 |
| Galaxius Systems Limited | Information & communication | 2013 |
| Galca Logistics Limited | Transport & logistics | 2023 |
| Gale&Sons Joinery Limited | Construction | 2011 |
| Galwyn (UK) Ltd | Professional & scientific | 2015 |
| Gameframe Designs Ltd | Manufacturing | 2026 |
| Gamprob Solution Limited | Education | 2025 |
| Gaoj Ltd | Health & social care | 2024 |
| GAP Property Services Limited | Real estate | 2001 |
| GAP Trading Limited | Wholesale & retail | 2013 |
| Gape Healthcare Limited | Health & social care | 2018 |
| Gardiner Hill Foundation | Health & social care | 2011 |
| Garry Electrical Consultants Limited | Construction | 2022 |
| Garry Pilkington Visual Limited | Professional & scientific | 1986 |
| Gary Mason Technologies Limited | Construction | 1998 |
| Gary Rickard Electrical Ltd | Construction | 2017 |
| GAS Training Grimsby Ltd | Education | 2013 |
| Gastown Cafe Ltd | Hospitality | 2019 |
| Gateway Assist Limited | Extraterritorial | 2013 |
| GATSBAR26 Ltd | Hospitality | 2026 |
| Gavin FS Solutions Limited | Administrative & support | 2018 |
| GB Bulk Haulage Ltd | Transport & logistics | 2016 |
| GB Ceramic Tiling Contractors Limited | Construction | 2006 |
| GB Field Services Ltd | Construction | 2017 |
| GB North Academy Limited | Education | 2026 |
| GB Specialist Limited | Administrative & support | 2010 |
| GB Statics Ltd | Wholesale & retail | 2024 |
| GB Suspended Ceilings Ltd | Construction | 2025 |
| GBA (Holdings) Limited | Transport & logistics | 1990 |
| GBA Group Limited | Financial services | 2015 |
| GBA Technical Services Limited | Transport & logistics | 2009 |
| GBA Technologies Limited | Transport & logistics | 2010 |
| GBA Transport Limited | Transport & logistics | 2000 |
| Gbcm Wholesale Limited | Wholesale & retail | 2018 |
| GBS Build Properties Ltd | Construction | 2023 |
| GBY Trading Ltd | Wholesale & retail | 2024 |
| GC Electrical Services Limited | Construction | 2015 |
| GC Food Services Ltd | Hospitality | 2025 |
| GCL Hospitality Ltd | Hospitality | 2004 |
| GCM Business Services Limited | Professional & scientific | 2006 |
| GCS Roofing Ltd | Construction | 2022 |
| GD SAN Ltd | Transport & logistics | 2015 |
| GD Ultimate Trade Ltd | Transport & logistics | 2019 |
| Gdasilva Limited | Real estate | 2017 |
| GDI Fundraising Ltd | Administrative & support | 2019 |
| GDM Lindex Limited | Administrative & support | 1985 |
| GDM Socialcare Limited | Health & social care | 2017 |
| GDS Catering Laundry Limited | Wholesale & retail | 2013 |
| GDX International Ventures Ltd | Construction | 2025 |
| GEEKTASTIC55 Ltd | Manufacturing | 2021 |
| Gelato Divino Merry Hill Ltd | Hospitality | 2018 |
| Gemma Borley Limited | Professional & scientific | 2019 |
| Gemstone (Lincs) Limited | Construction | 2013 |
| Genney Motors Limited | Wholesale & retail | 2004 |
| Geoffrey Davis Mortgage Solutions Limited | Financial services | 2008 |
| George Marshall Builders Limited | Construction | 2013 |
| George Street Builders Limited | Real estate | 2004 |
| George Trans SRL Limited | Transport & logistics | 2025 |
| Georgestresna Ltd | Transport & logistics | 2025 |
| Georgie BOY Limited | Financial services | 2016 |
| GES Electrical & Plumbing Services Limited | Construction | 2003 |
| Geslogistic Ltd | Transport & logistics | 2024 |
| GET Personal Ltd | Wholesale & retail | 2022 |
| GET Qualified Online Ltd | Education | 2024 |
| GET Your Glow on Ltd | Other services | 2021 |
| Gfde Ltd | Agriculture & fishing | 2025 |
| Ggrove Services Limited | Administrative & support | 2015 |
| GH31 Limited | Wholesale & retail | 2006 |
| GHC Property Services Limited | Real estate | 2017 |
| Ghetto Lincs. C.I.C. | Arts & recreation | 2014 |
| Ghuman Grimsby Ltd | Wholesale & retail | 2026 |
| GI Grimsby News Ltd | Information & communication | 2024 |
| GI Media Group Ltd | Information & communication | 2019 |
| Gibbs, Walker & Sons Limited | Construction | 2009 |
| Gidea Stores Ltd | Wholesale & retail | 2020 |
| Giea Printing Company Ltd | Manufacturing | 2025 |
| Gift the Change Limited | Extraterritorial | 2019 |
| Giles Electrical Services Ltd | Construction | 2019 |
| Gilliver Prime Construction Ltd | Construction | 2025 |
| Gilmore Holdings Ltd | Wholesale & retail | 2021 |
| Gina Healthcare Limited | Health & social care | 2016 |
| Giraffe and Elephant Ltd | Professional & scientific | 2016 |
| Girsby Vale Farm Ltd | Agriculture & fishing | 2014 |
| Give Way Mapping Limited | Professional & scientific | 2015 |
| GJB Plumbing & Property Maintenance Limited | Construction | 2009 |
| GK Renewables Limited | Manufacturing | 2017 |
| GKB Technical Services Ltd | Professional & scientific | 2013 |
| GKS Removals Ltd | Wholesale & retail | 2023 |