| GPS Electrical Contractors Limited | Construction | 2013 |
| Gradient Digital Limited | Information & communication | 2012 |
| Graeme & Brown Engineering Ltd | Administrative & support | 2011 |
| Grafter Ltd | Information & communication | 2026 |
| Grainco Limited | Wholesale & retail | 1995 |
| Grange Court Carrville Durham Management Limited | Households | 2006 |
| Grassroots Football Limited | Administrative & support | 2015 |
| Gray Building Limited | Construction | 2020 |
| GRC Filtration Ltd | Manufacturing | 2020 |
| Great Britannia Bathrooms Ltd | Construction | 2025 |
| Great North Building Consultancy Limited | Professional & scientific | 2025 |
| Great North Homes Limited | Real estate | 2022 |
| Green Baize Snooker, Pool & Sports Bar Limited | Hospitality | 2023 |
| Green Fingers Garden Centre Limited | Wholesale & retail | 2021 |
| Green Lane Fish & Chips Limited | Administrative & support | 2011 |
| Green Lane Fisheries Ltd | Administrative & support | 2020 |
| Green's Building Solution Ltd | Construction | 2024 |
| Green's Joinery Ltd | Construction | 2024 |
| Greenacres (Kings Vale) Management Company Limited | Real estate | 2003 |
| Greenheat Heating Cooling and Renewables Ltd | Construction | 2019 |
| Greensplace Ltd | Households | 2025 |
| Greenspoke Ltd | Professional & scientific | 2025 |
| Grey's Nishikigoi Ltd | Wholesale & retail | 2024 |
| Greyalien Ltd | Other services | 2020 |
| Greystones (Darlington) Management Company Limited | Households | 2001 |
| Greython Construction Ltd | Construction | 2026 |
| Grill Bar Haven Point Limited | Hospitality | 2021 |
| Grosvenor Business and Accountancy Services Limited | Professional & scientific | 2003 |
| Grosvenor Park Maintenance Limited | Households | 1972 |
| Growing Together South Tyneside Community Interest Company | Health & social care | 2024 |
| Grundy Painting and Property Maintenance Ltd | Manufacturing | 2019 |
| GT & AM Properties Ltd | Real estate | 2025 |
| GT PUB Company Limited | Hospitality | 2023 |
| Guardian Vape Ltd | Other services | 2017 |
| Gullane MC Ltd | Real estate | 2020 |
| Gunamsonenterprise Ltd | Wholesale & retail | 2022 |
| Guru's Grace Properties Ltd | Real estate | 2025 |
| Gym Plan Limited | Other services | 2014 |
| H M Waite Limited | Health & social care | 2013 |
| H Singh & Associates Ltd | Health & social care | 2009 |
| Habbershaw Property Management Ltd | Households | 2025 |
| Hades Fire Engineering Ltd | Professional & scientific | 2023 |
| Hadrian Earl Property Management Ltd | Real estate | 2026 |
| Haggerston Holiday Homes Ltd | Hospitality | 2016 |
| HAI an Ltd | Other services | 2026 |
| Haildean Transport Solutions Limited | Transport & logistics | 2021 |
| Hair by Jack Limited | Administrative & support | 2013 |
| Halcrow Industrial Services Ltd | Professional & scientific | 2024 |
| Hall Electrical Services Ltd | Construction | 2022 |
| Hall Green Meadows Management Limited | Real estate | 2024 |
| Hall Inspections Limited | Construction | 2012 |
| Halmant Ltd | Information & communication | 2026 |
| Halo Home Care Services Ltd | Health & social care | 2024 |
| Hamilton Hurtado Ltd | Construction | 2018 |
| HANAH123 Ltd | Hospitality | 2025 |
| Hands for Youth CIC | Education | 2022 |
| Hannays Solicitors and Advocates Limited | Professional & scientific | 2022 |
| Happi YOU Ltd | Wholesale & retail | 2021 |
| Happypedagogy Ltd | Education | 2023 |
| Happytayls Ltd | Agriculture & fishing | 2023 |
| Harbour Memorials Limited | Other services | 2026 |
| Harkus Engineering Limited | Construction | 2006 |
| Harle Peel Bottled GAS Supplies Ltd | Wholesale & retail | 2023 |
| Harrison Property Maintenance Services Ltd | Construction | 2017 |
| Harry Wilson Associates Limited | Wholesale & retail | 1988 |
| Harry's General Dealers Ltd | Wholesale & retail | 2017 |
| Harton Associates Limited | Information & communication | 2023 |
| Harton Garage Limited | Wholesale & retail | 2017 |
| Harton House Productions Ltd | Information & communication | 2024 |
| Harton Hub CIC | Education | 2022 |
| Harton KIN Ltd | Administrative & support | 2025 |
| Harton Leisure Ltd. | Hospitality | 2020 |
| Harton LUX Nails Ltd | Other services | 2024 |
| Harton Property Investments Limited | Real estate | 2006 |
| Harton Rope Solutions Ltd | Construction | 2025 |
| Harton Technical Services Limited | Manufacturing | 1995 |
| Harton Tips Ltd | Hospitality | 2025 |
| Harton Trading Co. Limited | Hospitality | 2026 |
| Harvey Offshore Construction Ltd | Manufacturing | 2025 |
| Harveymm Limited | Real estate | 2024 |
| HAS Builders and Properties Ltd | Construction | 2022 |
| Hasanshariar Limited | Hospitality | 2019 |
| Hasnova Technologies Ltd | Information & communication | 2025 |
| Hass Electrical Limited | Construction | 2026 |
| Hatton Academy of Dance Ltd | Arts & recreation | 2018 |
| Haveli South Shields Limited | Hospitality | 2024 |
| Haven Host Management Ltd | Real estate | 2025 |
| Havitex Consulting Int'L Ltd | Professional & scientific | 2017 |
| Hayley Defty Consulting Ltd | Professional & scientific | 2026 |
| HBJ Leisure Ltd | Hospitality | 2023 |
| HD Commercial Solutions Ltd | Construction | 2026 |
| Headley Asset Services Ltd | Households | 2025 |
| Health Express (UK) Limited | Wholesale & retail | 2007 |
| Health Systems (North East) Limited | Other services | 1998 |
| Health's Kitchen SS Limited | Hospitality | 2019 |
| Heartland Construction NE Ltd | Construction | 2023 |
| Heartland Loft Conversions Ltd | Construction | 2026 |
| Heartland Media Walls Ltd | Construction | 2025 |
| Heat (UK) Limited | Construction | 2012 |
| Heat-Air Ltd | Construction | 2018 |