| Glaisdale Management Ltd | Administrative & support | 2012 |
| Glam Taxis Ltd | Transport & logistics | 2019 |
| GLC Business Solutions Ltd | Professional & scientific | 2022 |
| Glen Office Supplies Limited | Wholesale & retail | 2005 |
| Glendenning Salon Rentals Ltd | Other services | 2025 |
| Glenwood Paint Supplies Limited | Construction | 1976 |
| Global Active Limited | Arts & recreation | 2016 |
| Global Commercial and Contract Services Ltd | Professional & scientific | 2016 |
| Global Foods Asian Ltd | Wholesale & retail | 2025 |
| Global Getaways Ltd | Hospitality | 2019 |
| Global Glam Ltd | Other services | 2025 |
| Global Peak Wealth Ltd | Professional & scientific | 2024 |
| Global Tripple H Limited | Manufacturing | 2025 |
| Gloryblaze Ltd | Manufacturing | 1997 |
| Glow Aesthetics NE Ltd | Health & social care | 2023 |
| Glow Glam Ltd | Other services | 2026 |
| Glow Investments Financial Trading Ltd | Information & communication | 2021 |
| GM & DJ Pickersgill Limited | Manufacturing | 2009 |
| GMD Joinery Limited | Manufacturing | 2022 |
| Gmmetrics Ltd | Information & communication | 2019 |
| GMS Consultancy Limited | Professional & scientific | 2025 |
| GN Engineering Limited | Construction | 2019 |
| Gnartec Limited | Wholesale & retail | 2019 |
| GNL Design Limited | Administrative & support | 2020 |
| Gnuk Ltd | Manufacturing | 2011 |
| Go Electric Gates Ltd | Manufacturing | 2022 |
| Go Local NE Limited | Wholesale & retail | 2023 |
| Goateaa Ltd | Wholesale & retail | 2025 |
| Goddard Property Holdings Ltd | Real estate | 2025 |
| Gofuyo Holdings Ltd | Financial services | 2026 |
| Gold Park Kent Limited | Hospitality | 2024 |
| Gold Star Academy Ltd | Education | 2024 |
| Golden Bars Darlo Ltd | Hospitality | 2025 |
| Golden Escape Ltd | Administrative & support | 2025 |
| Golden Frog Films Ltd | Information & communication | 2021 |
| Golden Light Books Ltd | Information & communication | 2026 |
| Golden Spoon Foods Ltd | Hospitality | 2025 |
| Golden Thread Consortium Ltd | Extraterritorial | 2024 |
| Goldfinch Ventures Limited | Real estate | 2010 |
| Goldielocks Training Academy Ltd | Other services | 2024 |
| Golding Enterprises Ltd | Wholesale & retail | 2015 |
| Goldmart Jewellery Repairs Limited | Other services | 1993 |
| Goldmart Limited | Wholesale & retail | 1984 |
| Golf EX Ltd | Wholesale & retail | 2026 |
| Golffluence Ltd | Professional & scientific | 2025 |
| Golink Advisory Ltd | Transport & logistics | 2020 |
| Gombs Shes Hub Limited | Professional & scientific | 2025 |
| Gomeric's Mound Limited | Financial services | 2024 |
| Gone NE Limited | Water & waste | 2025 |
| Gonga Spice Limited | Hospitality | 2023 |
| Good Investment Holdings Limited | Financial services | 2024 |
| Goode Durrant Administration Limited | Administrative & support | 1898 |
| Goodwill Advertising Limited | Wholesale & retail | 2006 |
| Goosepool 2019 Limited | Transport & logistics | 2019 |
| Goosepool Aviation Ltd | Transport & logistics | 2026 |
| Gordon Ramsay's Cleaner Cookers Limited | Other services | 2018 |
| Gorse Property Ltd | Real estate | 2024 |
| Goshen Consultancy Ltd | Other services | 2022 |
| Gough Homes Limited | Administrative & support | 2024 |
| Gouty Accounting Ltd | Professional & scientific | 2024 |
| GP Open Solutions Limited | Information & communication | 2015 |
| Gppg Company Limited | Real estate | 2022 |
| Grab & Go NE Ltd | Water & waste | 2022 |
| Grabs 4 U Limited | Water & waste | 2024 |
| Graham Hair and Beauty Limited | Wholesale & retail | 1986 |
| Grande Overstone Development Ltd | Real estate | 2022 |
| Grange Bar CIC | Wholesale & retail | 2022 |
| Grange Park Maintenance (Stockton) Limited | Administrative & support | 1995 |
| Grange Properties (NE) Limited | Real estate | 2018 |
| Grange Road (91 and 93) Darlington Limited | Households | 2002 |
| Grange Road Commercial Ltd | Real estate | 2026 |
| Grange Road Podiatry Ltd | Wholesale & retail | 2018 |
| Grange Vets Darlington Limited | Professional & scientific | 2010 |
| Grangefield Court RTM Company Limited | Households | 2008 |
| Grangeside N.E. Ltd | Real estate | 2013 |
| Granite Installation Contractors Ltd | Extraterritorial | 2017 |
| Granite Rentals Ltd | Construction | 2022 |
| Grantley Court Management Company Limited | Households | 1985 |
| Grapple XYZ Media Limited | Information & communication | 2020 |
| Grass Roots Training & Therapeutic Scheme Limited | Health & social care | 2011 |
| Grata Domum Ltd | Real estate | 2022 |
| Gravity Demolition Ltd | Construction | 2023 |
| Gray Iron Services Ltd | Manufacturing | 2022 |
| Gray Property Consultancy Ltd | Real estate | 2024 |
| Grayline Tiling Ltd | Construction | 2023 |
| Graylinee Limited | Wholesale & retail | 2025 |
| Grays & Brown Flooring and Interiors Ltd | Construction | 2019 |
| Grays of Yarm Ltd | Construction | 2021 |
| Great Paws Ltd | Other services | 2021 |
| Grecian Business Ltd | Other services | 2015 |
| Green Care Ltd | Health & social care | 2019 |
| Green Core Solutions Ltd | Professional & scientific | 2026 |
| Green Kite UK Ltd | Construction | 2013 |
| Greenalmond Global Service Ltd | Construction | 2025 |
| Greenhills Freehold Company Ltd | Real estate | 2026 |
| Greening Europe Ltd | Professional & scientific | 2023 |
| Greenline Roofing Ltd | Construction | 2025 |
| Greenmount House Management Company Limited | Households | 2016 |
| Greenside Court Residents' Association Limited | Real estate | 1992 |
| Greensync Limited | Professional & scientific | 2012 |