| G T Design (Ceramic) Limited | Manufacturing | 2006 |
| G&B Property Solutions Ltd | Construction | 2025 |
| G&D Residential Property Ltd | Real estate | 2023 |
| G&F Services Limited | Administrative & support | 2017 |
| G&G.Love.Transport Limited | Transport & logistics | 2025 |
| G&J Collective Limited | Wholesale & retail | 2025 |
| G&J Prestige Cars Ltd | Wholesale & retail | 2023 |
| G&L Landscape & Construction Services Ltd | Administrative & support | 2021 |
| G&Z International Ltd | Wholesale & retail | 2018 |
| G&Z Properties Ltd | Real estate | 2024 |
| G, C & R, E Durose Limited | Agriculture & fishing | 2025 |
| G. C. Walker & Co. Ltd | Professional & scientific | 2003 |
| G.Aesthetics Limited | Other services | 2023 |
| G.B Strategic Solutions Ltd | Transport & logistics | 2026 |
| G.D.A. Design Associates Limited | Professional & scientific | 2003 |
| G.E. Scragg and Sons Limited | Wholesale & retail | 2002 |
| G.G.Drylining Ltd. | Construction | 2018 |
| G.L.G. Properties Limited | Real estate | 1994 |
| G.T. Fire Limited | Construction | 2002 |
| G.T. Paper & Packaging Limited | Wholesale & retail | 1978 |
| G3ORG3 Limited | Construction | 2025 |
| Gabby Sibs Investments Limited | Health & social care | 2014 |
| Gabi Express Ltd | Transport & logistics | 2019 |
| Gabriel CAM Limited | Manufacturing | 2016 |
| Gabriella Rita & Co Limited | Real estate | 2025 |
| Gadget Centre Limited | Wholesale & retail | 2017 |
| Gaffney Scaffolding Services Ltd | Construction | 2021 |
| Gainz Protein Ltd | Wholesale & retail | 2025 |
| Gaitway Ltd | Other services | 2026 |
| Galactic Properties Limited | Financial services | 2020 |
| Galactic Racing Limited | Other services | 2021 |
| Galactic Technologies Limited | Financial services | 2020 |
| Galactic Vision Limited | Financial services | 2018 |
| Galante Barbers Ltd | Other services | 2025 |
| Galathians Care Ltd | Administrative & support | 2023 |
| Galawise Transport Limited | Transport & logistics | 2018 |
| Gallabond Food Co. Ltd | Manufacturing | 2026 |
| Gallagher Rope Access Ltd | Professional & scientific | 2018 |
| Gallóglaigh Consulting Ltd | Professional & scientific | 2023 |
| Gama Construction and Building Ltd | Construction | 2024 |
| Game Ltd | Extraterritorial | 2025 |
| Game Strix Studio Ltd | Information & communication | 2025 |
| Gamegrid Ltd | Information & communication | 2022 |
| Gamer PC UK Ltd | Wholesale & retail | 2024 |
| Gamespan Ltd | Arts & recreation | 2025 |
| Gamist Limited | Financial services | 2015 |
| Gamity CIC | Wholesale & retail | 2026 |
| Ganesh Convenience Limited | Wholesale & retail | 2017 |
| Gannock Properties Limited | Real estate | 1972 |
| Ganymede Group Ltd | Construction | 2022 |
| GAP Pipe Holdings Ltd | Financial services | 2024 |
| GAP Pipe Installations Limited | Construction | 2008 |
| Garana Ltd | Hospitality | 2016 |
| Garde LA FOI Ltd | Wholesale & retail | 2020 |
| Garden Buildings Centres Ltd | Real estate | 1998 |
| Garden Dishes Limited | Hospitality | 2021 |
| Garden of Remembrance Limited | Other services | 2011 |
| Gardens of Distinction Limited | Administrative & support | 2008 |
| Gardiners Reclaimed Building Materials Limited | Water & waste | 2000 |
| Gareth 'S Company Ltd 90 Ltd | Wholesale & retail | 2025 |
| Gareth a Leese & SON Ltd | Wholesale & retail | 2023 |
| Gareth Coles Farm Limited | Agriculture & fishing | 2015 |
| Garlick Demolition Ltd | Construction | 2020 |
| Garman Properties Ltd | Real estate | 2019 |
| Garmsai Ltd | Information & communication | 2025 |
| Garmy Healthcare Ltd | Manufacturing | 2018 |
| Garner Storage Ltd | Real estate | 2021 |
| Garratt Family Ltd | Real estate | 2021 |
| Garvey Brown Properties Ltd | Real estate | 2024 |
| Gary Andrews Upholstery Ltd | Manufacturing | 2012 |
| Gary Lang Civils Limited | Construction | 2018 |
| Gary Morris Building Services Limited | Construction | 2011 |
| GAS Care (Staffs & Cheshire) Ltd | Construction | 2008 |
| GAS Care (Stoke-On-Trent) Limited | Professional & scientific | 1998 |
| GAS Stoke Limited | Other services | 2018 |
| Gastec Staffs Ltd | Energy | 2025 |
| Gastec Stoke Ltd | Energy | 2023 |
| Gastite Services (UK) Limited | Construction | 2013 |
| Gatehouse Plant Sales Limited | Construction | 2019 |
| Gateway Automotive Ltd | Wholesale & retail | 2026 |
| Gateway Psychology Limited | Health & social care | 2014 |
| Gateway SL Holdings Limited | Financial services | 2020 |
| Gateway SL North Road Limited | Construction | 2021 |
| Gateway Technology Investments Ltd | Information & communication | 2025 |
| Gather Community Club and Classes Ltd | Arts & recreation | 2024 |
| Gather the Community CIC | Education | 2024 |
| Gator Events Ltd | Arts & recreation | 2018 |
| Gautam Bettegowda Limited | Health & social care | 2014 |
| GB & European Holdings Limited | Financial services | 2013 |
| GB Hire Limited | Transport & logistics | 2023 |
| GB Liqour Limited | Wholesale & retail | 2025 |
| GB Vent Services Limited | Construction | 2022 |
| GBB Wholesale Ltd | Wholesale & retail | 2025 |
| GBC Buildings for Leisure LLP | | 2017 |
| GBT Courier Ltd | Transport & logistics | 2025 |
| Gbuk Outlets Ltd | Wholesale & retail | 2016 |
| GC Wigan Ltd | Real estate | 2024 |
| Gcdf Ltd | Manufacturing | 2024 |
| GCP Accountancy Services Limited | Professional & scientific | 2002 |
| GDR Retail Ltd | Wholesale & retail | 2017 |