| Golf Works 4 U Limited | Arts & recreation | 2012 |
| Good Inn's Limited | Hospitality | 2014 |
| Goodwill Gaming Ltd | Manufacturing | 2022 |
| Goosey Goose Limited | Extraterritorial | 2025 |
| Gordoall Limited | Construction | 2014 |
| Goulton Stables Limited | Agriculture & fishing | 2026 |
| Gourmet Baker Limited | Administrative & support | 1996 |
| Governing Body of High Tunstall College of Science Limited | Administrative & support | 2017 |
| GP Safety Services Ltd | Professional & scientific | 2013 |
| GPK Brickwork Ltd | Construction | 2018 |
| Graceful Hair and Beauty Ltd | Other services | 2023 |
| Grampian Cafe Ltd | Hospitality | 2019 |
| Grange Estate Management Limited | Real estate | 2020 |
| Grange Lettings One Limited | Real estate | 2017 |
| Grange Road Flat Management Company Limited | Professional & scientific | 2008 |
| Grantham Joinery & Construction of Hartlepool Ltd | Construction | 2004 |
| Grape Construction Ltd | Construction | 2026 |
| Grape OR the Grain Ltd | Hospitality | 2013 |
| Graveside Memorials Ltd | Manufacturing | 2023 |
| Grays Bespoke Kitchens and Interiors Ltd | Construction | 2021 |
| Grays Electrical and Compliance Ltd | Construction | 2020 |
| Great Idea Technology Limited | Information & communication | 2020 |
| Greatham Community Association Limited | Real estate | 2012 |
| Greek Xenia Limited | Wholesale & retail | 2023 |
| Green Leaf Homes Limited | Construction | 2013 |
| Green Tree Distribution Limited | Extraterritorial | 2012 |
| Greenleigh Developments Ltd | Construction | 2022 |
| Greenmarket Group Ltd | Construction | 2022 |
| Greenworld Construction Ltd | Construction | 2020 |
| Grey's Inspection Services Ltd | Professional & scientific | 2014 |
| Grhc Consulting Ltd | Professional & scientific | 2024 |
| Grid North East Ltd | Construction | 2015 |
| Gridmark Survey Limited | Administrative & support | 2013 |
| Gridnetworx Ltd | Professional & scientific | 2020 |
| Grill Flavas Ltd | Hospitality | 2025 |
| Groflo Ltd | Professional & scientific | 2025 |
| Groom for Improvement Painting & Decorating Ltd | Construction | 2025 |
| Groomingdales of Hartlepool Limited | Professional & scientific | 2013 |
| Grove Property Lettings Ltd | Real estate | 2022 |
| Grows Properties Ltd | Real estate | 2024 |
| GS ENG Tech Ltd | Professional & scientific | 2020 |
| GSC Construction Limited | Construction | 2016 |
| GSC Developments NE Limited | Real estate | 2020 |
| GSH Hair Ltd | Other services | 2021 |
| GSK Coaching Academy Limited | Health & social care | 2024 |
| GT Accounting Limited | Professional & scientific | 2019 |
| GT Aviation (Elwick) LLP | | 2019 |
| Gt-Hse Consultants Ltd | Professional & scientific | 2025 |
| Guess Logistics Ltd | Transport & logistics | 2019 |
| Guided Mind Limited | Wholesale & retail | 2013 |
| Guo's Food Limited | Hospitality | 2022 |
| GV Hartlepool Ltd | Wholesale & retail | 2025 |
| GVB Inspections Limited | Professional & scientific | 2011 |
| GVR Retail Sales Limited | Wholesale & retail | 2025 |
| GW Project Management Ltd | Construction | 2023 |
| Gym Grill Ltd | Hospitality | 2022 |
| Gymbeastvip Ltd | Wholesale & retail | 2025 |
| H & a PUB Ltd | Hospitality | 2026 |
| H & D Property (North East) Limited | Real estate | 2021 |
| H & P Fisheries Ltd | Hospitality | 2015 |
| H Elite Limited | Arts & recreation | 2022 |
| H Rowntree Ltd | Administrative & support | 2023 |
| H Tones Auto Services Limited | Wholesale & retail | 2021 |
| H Tones Oxford Garage Limited | Wholesale & retail | 2014 |
| H Wise Electrical Ltd | Manufacturing | 2024 |
| H&M Boudriga Ltd | Households | 2025 |
| H&P Properties Limited | Real estate | 2013 |
| H&R Cosmetics Ltd | Manufacturing | 2018 |
| H.D.A. Communications Limited | | 1985 |
| H.E.S. Group UK Limited | Construction | 2008 |
| H2O Industries Ltd | Construction | 2024 |
| Ha'Way Inn Limited | Hospitality | 2023 |
| Haani Electrocore International Ltd | Wholesale & retail | 2009 |
| Habitations Private Ltd | Real estate | 2005 |
| Habits of Success Ltd | Arts & recreation | 2021 |
| Hackworth Commercial Consultants Limited | Professional & scientific | 2012 |
| Hades Finance Limited | Professional & scientific | 2022 |
| HAI Electrical Limited | Professional & scientific | 2011 |
| HAIR@150 Limited | Other services | 2014 |
| Hall & Hall (Vehicle Hire) Limited | Real estate | 1979 |
| Hall Media Ltd | Professional & scientific | 2019 |
| Hameed Investments Limited | Construction | 2002 |
| Hami Spice Ltd | Hospitality | 2020 |
| Hamilton Jackson Ltd | Construction | 2013 |
| Hammond Cutting Tools Limited | Manufacturing | 1993 |
| Handley Engineering and Machining Services Ltd | Manufacturing | 2016 |
| Hanoc Ltd | Wholesale & retail | 2020 |
| Hanson's Enterprise Limited | Other services | 2017 |
| Happy Nails 102 Ltd | Other services | 2024 |
| Happylass Limited | Wholesale & retail | 2020 |
| Harbor Developments Ltd | Real estate | 2026 |
| Harbottle Property Investment Ltd | Real estate | 2025 |
| Harbour Support Services | Health & social care | 2001 |
| Harbour Walk LLP | | 2005 |
| Harc Care Services Ltd | Health & social care | 2025 |
| Hargreaves Brash Properties Ltd | Real estate | 2022 |
| Harland Military Antiques Ltd | Wholesale & retail | 2010 |
| Harley Holdings Limited | Financial services | 2024 |
| Harluc Projects Ltd | Professional & scientific | 2020 |
| Harmonised World Ltd | Professional & scientific | 2009 |