| Greenwell Property Services Limited | Real estate | 2018 |
| Greenwood Audio Visual Limited | Manufacturing | 2008 |
| Gresswell Electrical Services Limited | Construction | 2021 |
| Greys Sales Consultants Ltd | Professional & scientific | 2017 |
| GRF Hire Limited | Administrative & support | 2001 |
| GRF Site Services Limited | Construction | 2022 |
| Grim Dice Tabletop Gaming Ltd | Wholesale & retail | 2018 |
| Grim Video Production Services Limited | Information & communication | 2016 |
| Grimbarian Security Limited | Administrative & support | 2021 |
| Grimbarians C.I.C. | Professional & scientific | 2020 |
| Grimmm Studios Ltd | Information & communication | 2019 |
| Grims Functional Fitness and Strength Centre Ltd | Arts & recreation | 2022 |
| Grimsbee Digital Limited | Professional & scientific | 2025 |
| Grimsby & Clee Eats Ltd | Wholesale & retail | 2020 |
| Grimsby & District School of Gymnastics C.I.C. | Education | 2020 |
| Grimsby Advertising Services Limited | Professional & scientific | 2015 |
| Grimsby Aircon Ltd | Construction | 2024 |
| Grimsby Amateur Boxing Club Limited | Arts & recreation | 2015 |
| Grimsby Anaesthesia Associates Limited | Health & social care | 2016 |
| Grimsby and Cleethorpes Yacht Club Limited | Arts & recreation | 1957 |
| Grimsby and District Junior Snooker Academy CIC | Arts & recreation | 2025 |
| Grimsby Auto Body Repair Ltd | Wholesale & retail | 2017 |
| Grimsby Auto Services Limited | Wholesale & retail | 2023 |
| Grimsby Barbers Limited | Other services | 2025 |
| Grimsby Car Salvage Ltd | Water & waste | 2023 |
| Grimsby Carpet Warehouse Ltd | Extraterritorial | 2018 |
| Grimsby Cars Limited | Wholesale & retail | 2008 |
| Grimsby Central Hall Trust | Arts & recreation | 2004 |
| Grimsby Cladding and Maintenance Services Limited | Construction | 2015 |
| Grimsby Cleethorpes and Humber Region Y.M.C.A | Hospitality | 1996 |
| Grimsby College Trading Limited | Construction | 1995 |
| Grimsby Container Storage Limited | Real estate | 2026 |
| Grimsby Decorators Limited | Construction | 2025 |
| Grimsby Dementia Care Ltd | Professional & scientific | 2011 |
| Grimsby E-Waste Solutions Ltd | Water & waste | 2024 |
| Grimsby Event Medical Services Ltd | Health & social care | 2025 |
| Grimsby Exterior Cleaning Ltd | Administrative & support | 2022 |
| Grimsby Fabrication Ltd | Construction | 2025 |
| Grimsby Fish Dock Enterprises Limited | Agriculture & fishing | 1991 |
| Grimsby Fish Docks Catering Limited | Hospitality | 2011 |
| Grimsby Fish Market Limited | Agriculture & fishing | 2007 |
| Grimsby Fish Market Services Limited | Hospitality | 2011 |
| Grimsby Fish Merchant's Association Limited | Other services | 1911 |
| Grimsby Fish Services UK Limited | Wholesale & retail | 2010 |
| Grimsby Five Spice Limited | Wholesale & retail | 2018 |
| Grimsby Food Processing Ltd | Manufacturing | 2017 |
| Grimsby Forest Training Services Ltd | Professional & scientific | 2013 |
| Grimsby Freestyle Kickboxing Club Ltd | Arts & recreation | 2022 |
| Grimsby Freezing Services Limited | Manufacturing | 2022 |
| Grimsby Golf Club Trading Limited | Arts & recreation | 2016 |
| Grimsby Granulation Limited | Water & waste | 2017 |
| Grimsby Gymnastics Club Limited | Arts & recreation | 2020 |
| Grimsby Hub Ltd | Information & communication | 2023 |
| Grimsby Ice Rink | Arts & recreation | 2017 |
| Grimsby in Bloom Solutions C.I.C. | Administrative & support | 2016 |
| Grimsby Landing Company Limited | Manufacturing | 2004 |
| Grimsby Lawnmower Centre Ltd | Manufacturing | 2023 |
| Grimsby Lawnmower Centre Services and Repairs Ltd | Other services | 2026 |
| Grimsby Leaseholding Limited | Professional & scientific | 2010 |
| Grimsby Lifts Limited | Construction | 2002 |
| Grimsby Lock & Hardware Limited | Wholesale & retail | 2008 |
| Grimsby Marina Limited | Real estate | 2010 |
| Grimsby Marine Limited | Other services | 2014 |
| Grimsby Maritime Heritage CIC | Education | 2025 |
| Grimsby Masonic Hall Company Limited | Other services | 1971 |
| Grimsby Metals Ltd | Wholesale & retail | 2022 |
| Grimsby Minibuses Limited | Transport & logistics | 2013 |
| Grimsby MOT Centre Ltd | Wholesale & retail | 2025 |
| Grimsby Motors Ltd | Wholesale & retail | 2023 |
| Grimsby Netball Club Limited | Arts & recreation | 2023 |
| Grimsby Pallet Company Limited | Manufacturing | 2015 |
| Grimsby Pipework and Engineering (Lifting) Ltd | Professional & scientific | 2026 |
| Grimsby Pipework and Engineering (Sheetmetal) Ltd | Professional & scientific | 2025 |
| Grimsby Pipework and Engineering Ltd | Professional & scientific | 2023 |
| Grimsby Pizza House Ltd | Hospitality | 2025 |
| Grimsby Pizza Ltd | Hospitality | 2024 |
| Grimsby Pizzeria Ltd | Hospitality | 2025 |
| Grimsby Polimaxx Ltd | Wholesale & retail | 2024 |
| Grimsby Properties Holding Ltd | Real estate | 2026 |
| Grimsby Recovery Ltd | Other services | 2018 |
| Grimsby Retailers in Partnership CIC | Administrative & support | 2019 |
| Grimsby Road Business Centre Limited | Professional & scientific | 2004 |
| Grimsby Roofing Limited | Construction | 2014 |
| Grimsby Scaffolding Services Ltd. | Construction | 2014 |
| Grimsby Security Ltd | Administrative & support | 2022 |
| Grimsby Shipyard Services Ltd | Manufacturing | 2016 |
| Grimsby Solicitors Limited | Professional & scientific | 2010 |
| Grimsby Specsavers Limited | Wholesale & retail | 1986 |
| Grimsby Takeaway Ltd | Hospitality | 2026 |
| Grimsby Tennis Centre Limited | Arts & recreation | 2024 |
| Grimsby Town Cricket Club | Arts & recreation | 2014 |
| Grimsby Twist & Flip Gymnastics Academy Ltd | Arts & recreation | 2016 |
| Grimsby Tyre Warehouse Ltd | Wholesale & retail | 2023 |
| Grimsby United Football Club Ltd | Arts & recreation | 2025 |
| Grimsby Upvc Repairs & Installations Limited | Financial services | 2025 |
| Grimsby Visionplus Limited | Wholesale & retail | 1998 |
| Grimsby Wargames Society Limited | Other services | 2018 |
| Grimsby Welding Inspection Services Limited | Construction | 2014 |
| Grimsby Youth Zone | Arts & recreation | 2019 |
| Grimsby, Cleethorpes & District Citizens Advice Bureau | Information & communication | 1998 |