| Garden Social Limited | Hospitality | 2020 |
| Gargano Ltd | Real estate | 2021 |
| Garika's Limited | Wholesale & retail | 2025 |
| Garner Property Services Limited | Other services | 2015 |
| Garryduff Properties Limited | Real estate | 2026 |
| Garth Court Flats (Llandudno) Limited | Households | 1973 |
| Gary Cross Heating & Plumbing Ltd | Construction | 2024 |
| Gary Davies & Co. Limited | Construction | 1999 |
| GAS Safe America Limited | Manufacturing | 2013 |
| GAS Safe Europe Limited | Manufacturing | 2010 |
| GAS Safe India Limited | Manufacturing | 2025 |
| Gasworks Creative Limited | Arts & recreation | 2012 |
| GATE7LIVING Ltd | Hospitality | 2025 |
| Gatesheath Holdings Limited | Professional & scientific | 2025 |
| Gather Campaigns Limited | Other services | 2013 |
| Gathurst Investments | Financial services | 2025 |
| Gathurst Properties Limited | Real estate | 2023 |
| GB Group PLC | Information & communication | 1989 |
| GB Risk Surveys Ltd | Financial services | 2019 |
| Gb-Sf Ltd | Wholesale & retail | 2024 |
| GBG Solutions Limited | Information & communication | 2003 |
| GBG Tech Limited | Information & communication | 2002 |
| GBG Tech Solutions Limited | Information & communication | 2002 |
| GBG Technologies Limited | Professional & scientific | 1999 |
| GBG Technology Limited | Information & communication | 1997 |
| GBG Technology Solutions Limited | Information & communication | 2020 |
| GCC Developments Ltd | Construction | 2011 |
| GCM Procurement Limited | Professional & scientific | 2018 |
| GCV Management Consultants Limited | Professional & scientific | 2019 |
| GDE Construction Ltd | Construction | 2018 |
| Gdleads Ltd | Information & communication | 2026 |
| Gduuz Global Ltd | Wholesale & retail | 2021 |
| GDW Paddock Helsby Limited | Households | 2018 |
| Geanyco Ltd | Transport & logistics | 2025 |
| Gees PUB Ltd | Hospitality | 2024 |
| Geiko Beauty Ltd | Other services | 2025 |
| Gekk Properties Limited | Financial services | 2025 |
| Gekk Smiles Limited | Health & social care | 2025 |
| Gelha Limited | Professional & scientific | 2009 |
| GEM Tech Investments Limited | Wholesale & retail | 2011 |
| GEM Tech Jewellery Limited | Wholesale & retail | 2011 |
| Gemini Legal Ltd | Professional & scientific | 2017 |
| Geminus Evita Ltd | Administrative & support | 2025 |
| Gemixir Limited | Manufacturing | 2019 |
| GEN Fit Limited | Extraterritorial | 2012 |
| Gen-Green Limited | Construction | 2022 |
| Genbank Energy Limited | Energy | 2022 |
| General Cosmetic Safety Ltd | Professional & scientific | 2020 |
| General Physiotherapy Services Ltd | Health & social care | 2025 |
| GENERATION30 Ltd | Real estate | 2016 |
| Genesis Tech UK Limited | Extraterritorial | 2012 |
| Genial Compliance Systems Ltd | Information & communication | 2013 |
| Genial Genetic Solutions Limited | Information & communication | 2001 |
| Genial Helix Ltd | Wholesale & retail | 2014 |
| Genova Investments Limited | Professional & scientific | 1989 |
| Gentle Beauty & Cosmetics Limited | Other services | 2019 |
| Genzeduk Ltd | Wholesale & retail | 2025 |
| Geo.Em.Smiles Ltd | Health & social care | 2020 |
| Geoem Holdings Limited | Financial services | 2025 |
| Geoem Properties Limited | Real estate | 2025 |
| Geoff Dale Autocentres Limited | Wholesale & retail | 2014 |
| George Hotel Investments Limited | Real estate | 2005 |
| Georgia Drew Ltd | Professional & scientific | 2026 |
| Georgie Cafe Ltd | Hospitality | 2025 |
| Georgis Properties Ltd | Real estate | 2023 |
| Geovitia Limited | Professional & scientific | 2020 |
| GEP Group Ltd | Extraterritorial | 2013 |
| Gerry-App Limited | Information & communication | 2026 |
| Gervik Limited | Health & social care | 2015 |
| Gerynant Limited | Real estate | 2006 |
| GES Financial Solutions Limited | Financial services | 2008 |
| Gestalt Network Solutions Limited | Information & communication | 2014 |
| GET Nude Life Drawing Ltd | Arts & recreation | 2022 |
| GET Your ACT Together Ltd | Arts & recreation | 2013 |
| Getnixonit Ltd | Professional & scientific | 2026 |
| Geufron Holdings Ltd | Financial services | 2026 |
| Geyik Ltd | Administrative & support | 2023 |
| GFG Limited | Hospitality | 2023 |
| GFL Scaffolding Services Ltd | Construction | 2020 |
| GG-339-668 Limited | Real estate | 2024 |
| GG-592-879 Limited | Real estate | 2021 |
| GH Food Ventures Ltd | Wholesale & retail | 2025 |
| GH Lifting Services Ltd | Administrative & support | 2019 |
| Ghatwary Limited | Health & social care | 2023 |
| GHJ Marine Ltd | Education | 2025 |
| Ghost Hunting Equipment UK Ltd | Manufacturing | 2025 |
| GHQ Chester Limited | Other services | 2016 |
| GHR Property Limited | Real estate | 2013 |
| GHR Training Limited | Education | 2020 |
| GIA Holdings Limited | Wholesale & retail | 2023 |
| Gibbs and Morris Limited | Information & communication | 2018 |
| Gibbs&Hobsonestates Ltd | Real estate | 2025 |
| GID Interim Limited | Professional & scientific | 2015 |
| Giddy Gate Limited | Real estate | 2023 |
| Giddy Goat Homes Ltd | Real estate | 2025 |
| Giero Property Investments Ltd | Real estate | 2026 |
| Gifts and Guidance Ltd | Wholesale & retail | 2011 |
| Gigabyte Software Limited | Information & communication | 2015 |
| Gigan Settlement Ltd | Professional & scientific | 2018 |
| Gildoodah Productions Ltd | Information & communication | 2016 |