| G.I. FOX Limited | Real estate | 2003 |
| G.J. Technology Limited | Information & communication | 2001 |
| G.K. IT Solutions Ltd | Information & communication | 2014 |
| G.M. Paving & Landscaping Ltd | Construction | 2019 |
| G.M.Mana Limited | Professional & scientific | 2018 |
| G.O.A.T Services Limited | Construction | 2019 |
| G.Pearson Solutions Ltd | Professional & scientific | 2026 |
| G.R.S Electrical & Heating Ltd | Manufacturing | 2006 |
| G.T. Design Limited | Professional & scientific | 2005 |
| G2 Properties Investment Ltd | Real estate | 2023 |
| G2EVENTS Ltd | Arts & recreation | 2018 |
| G2S Accountants Ltd | Professional & scientific | 2025 |
| G7 Security Solutions Ltd | Administrative & support | 2025 |
| Gabrielle Finn Consultancy Limited | Professional & scientific | 2023 |
| GAC Industrial Services Ltd | Construction | 2025 |
| Gadding About Limited | Administrative & support | 2009 |
| Gadgets & Iphones Ltd | Wholesale & retail | 2024 |
| Gaffney GAS Limited | Wholesale & retail | 2021 |
| Gafstar Construction and Groundworks Limited | Construction | 2025 |
| Gala Professional Cleaners Ltd | Administrative & support | 2023 |
| Gallach Engineering Ltd | Professional & scientific | 2023 |
| Galloway & Thompson Joinery Ltd | Construction | 2026 |
| Game Changers Group Ltd | Transport & logistics | 2020 |
| Ganic Pizzeria Ltd | Hospitality | 2023 |
| Gapp Rigging Services Ltd | Construction | 2024 |
| Garbutt Cleaning Services Ltd | Administrative & support | 2017 |
| Garbutt Heaters Limited | Extraterritorial | 2006 |
| Garde Mager Teesside Ltd | Wholesale & retail | 2018 |
| Garden Close (Stokesley) Limited | Other services | 2004 |
| Garden Guys Landscaping Ltd | Administrative & support | 2020 |
| Garden Guys Landscaping Supplies Ltd | Wholesale & retail | 2022 |
| Gardenprime Limited | Wholesale & retail | 2017 |
| Gary Hunt Wind Services Limited | Construction | 2011 |
| Gary Wheatley Inspection Ltd | Professional & scientific | 2023 |
| Gatehouse Holdings NE Ltd | Financial services | 2025 |
| Gatehouse Investments NE Ltd | Real estate | 2025 |
| Gaughan Construction Management Services Ltd | Construction | 2018 |
| GAZ GAZ 12 Limited | Real estate | 2023 |
| GB Auto Mobiles Limited | Wholesale & retail | 2025 |
| GB Developers Limited | Energy | 2002 |
| GB Mortgage Broker Ltd | Financial services | 2026 |
| GB55 Construction Services Ltd | Professional & scientific | 2013 |
| GBA (NE) Ltd | Construction | 2025 |
| Gbolex Creators LAB Ltd | Education | 2026 |
| GBP Enterprises Limited | Real estate | 2003 |
| GBY (UK) Ltd | Wholesale & retail | 2011 |
| GC Cones Limited | Manufacturing | 2011 |
| GC Management Services Ltd | Professional & scientific | 2016 |
| GCC Holdings Ltd | Professional & scientific | 2019 |
| Gcge Limited | Construction | 2023 |
| GCI Ventures Ltd | Wholesale & retail | 2025 |
| Gcsl Property Limited | Households | 2026 |
| GD & JD Investments Limited | Financial services | 2018 |
| GD Financial (NE) Ltd | Financial services | 2022 |
| GDS Optical Ltd | Health & social care | 2022 |
| GE Engineering Services Limited | Public administration | 2015 |
| GEB Power Limited | Energy | 2008 |
| GED Flynn Consultancy Services Ltd | Professional & scientific | 2025 |
| GEE DEE Plant Ltd | Extraterritorial | 2012 |
| Gehenna Cult Limited | Wholesale & retail | 2024 |
| Gender Consultants Ltd | Wholesale & retail | 2026 |
| Generation Travel Limited | Transport & logistics | 2010 |
| Gensokyo Systems Ltd | Manufacturing | 2023 |
| Gentlekeys Ltd | Manufacturing | 2020 |
| Gentz Barbers Stokesley Ltd | Other services | 2025 |
| Gentz Hair & Grooming Ltd | Other services | 2021 |
| Genuinestyleuk Ltd | Wholesale & retail | 2014 |
| GEO Auto Ltd | Wholesale & retail | 2022 |
| GEO Cleaning Limited | Transport & logistics | 2025 |
| GEO Food Grocery Store Ltd | Wholesale & retail | 2025 |
| Geoff Antons Limited | Health & social care | 2008 |
| Geoinvestigate Ltd | Administrative & support | 1997 |
| Geoiuliana Limited | Wholesale & retail | 2023 |
| George Stainthorp Properties Limited | Real estate | 2013 |
| Georgel Transporter Good Ltd | Transport & logistics | 2026 |
| Georgia Gough Design Ltd | Professional & scientific | 2022 |
| Gepg Kettering Ltd | Energy | 2023 |
| Geraldoos Clean Limited | Administrative & support | 2026 |
| Gerancy Limited | Professional & scientific | 2021 |
| German Auto Breakers Ltd | Water & waste | 2020 |
| GET Back to the Action Sports Therapy Ltd | Arts & recreation | 2018 |
| GET Back to the Action Stockton Ltd | Health & social care | 2026 |
| GET Create Limited | Arts & recreation | 2019 |
| GET Yourself Spotted Limited | Education | 2024 |
| Geta Painter & Decorators Ltd | Construction | 2020 |
| GFF Business Development Limited | Professional & scientific | 2015 |
| GG Sales Ltd | Wholesale & retail | 2024 |
| GG-510-295 Limited | Real estate | 2023 |
| Ghafoor & Sons Holdings Limited | Wholesale & retail | 2025 |
| Ghost Innovations Ltd | Manufacturing | 2018 |
| Ghost Maritime Services Limited | Transport & logistics | 2012 |
| Gibb&Lagan Developments Limited | Real estate | 2021 |
| Gideon Engineering Ltd | Professional & scientific | 2021 |
| Gift Car Ltd | Wholesale & retail | 2024 |
| Gigis Pizzeria Ltd | Hospitality | 2026 |
| Gillian Duffy & Co Ltd | Professional & scientific | 2020 |
| Ginninton Associates Limited | Real estate | 2004 |
| Giovanipainting Ltd | Construction | 2025 |
| Gittins Rigging Ltd | Construction | 2025 |
| GJ Fibre Ltd | Information & communication | 2019 |