| Gapuma Group Limited | Administrative & support | 2008 |
| Gapuma Holdings Limited | Professional & scientific | 2018 |
| Gapuma Logistics Services Limited | Administrative & support | 2023 |
| Garage Group Ltd | Wholesale & retail | 2020 |
| Garage Limitless MK Ltd | Wholesale & retail | 2023 |
| Garage Nation Ltd | Arts & recreation | 2014 |
| Garage Owners Network Limited | Extraterritorial | 2019 |
| Garcha Nest Properties Ltd | Real estate | 2015 |
| Garden Lights Trading Limited | Wholesale & retail | 2024 |
| Garden Summer Houses Ltd | Construction | 2020 |
| Gareth Curtis Radio Control Ltd | Wholesale & retail | 2022 |
| Garfield Consultancy Ltd | Information & communication | 2018 |
| Garfield Holdings Limited | Information & communication | 2021 |
| Garilla Limited | Wholesale & retail | 2024 |
| Garners Catering Equipment Limited | Manufacturing | 1983 |
| Garnet Suites Ltd | Real estate | 2019 |
| Garrett House Residential Home Limited | Health & social care | 2022 |
| Garrett Mcgrath Catering Limited | Hospitality | 2018 |
| Garrod Psychological Services Ltd | Information & communication | 2017 |
| Garth Hampshire and Associates Limited | Administrative & support | 2022 |
| Gartree Services Limited | Financial services | 2022 |
| Garuda Real Estate Ltd | Real estate | 2019 |
| Garvin&Brown Ltd | Wholesale & retail | 2012 |
| Garware Technical Fibres UK PVT Ltd | Wholesale & retail | 2025 |
| Gary Ashton Limited | Professional & scientific | 2011 |
| Gaskell Build Ltd | Construction | 2012 |
| Gaskell Group Ltd | Extraterritorial | 2012 |
| Gaskell Maintain Ltd | Extraterritorial | 2012 |
| Gaskell Refurbishments Ltd | Construction | 2005 |
| Gasteam Ltd | Construction | 2012 |
| Gastek Services Ltd | Construction | 2015 |
| Gastight MK Ltd | Construction | 2016 |
| GAT3HOUSE Ltd | Information & communication | 2023 |
| Gate Online Ltd | Information & communication | 2020 |
| Gateview Realestate Limited | Real estate | 2025 |
| Gateview Technologies Limited | Information & communication | 2018 |
| Gateway Managed Services Limited | Education | 2017 |
| Gatey Mcnaughtan Ltd | Real estate | 2020 |
| Gaudium Taverns Ltd | Arts & recreation | 2024 |
| Gavin Dean Plastering Ltd | Construction | 2022 |
| Gavin Langford Rigging Ltd | Construction | 2024 |
| Gavin Mcready Creative Ltd | Professional & scientific | 2026 |
| Gavin Murphy Photography Limited | Professional & scientific | 2020 |
| GAW Electrics Ltd | Construction | 2019 |
| Gawumens Company Limited | Transport & logistics | 2023 |
| GB Electrical Services (MK) Ltd | Construction | 2025 |
| GB Inns Retail NO1 Ltd | Hospitality | 2018 |
| GB Installers Ltd | Construction | 2021 |
| GB Lights PLC | Agriculture & fishing | 2020 |
| GB Speedway Team Limited | Arts & recreation | 2018 |
| GB Universe Ltd | Transport & logistics | 2021 |
| GB Wyngates Limited | Professional & scientific | 2012 |
| Gbadebo Alli and Sons Limited | Construction | 2018 |
| Gbafc Ltd | Professional & scientific | 2023 |
| Gbdjb Accountancy & Consultancy Professional Services Ltd | Professional & scientific | 2010 |
| Gbeventslive Ltd | Professional & scientific | 2023 |
| Gbgh Limited | Health & social care | 2019 |
| GBH Developments Ltd | Construction | 2012 |
| GBM Consulting Ltd | Information & communication | 2015 |
| GBT Tech. Co. Ltd | Wholesale & retail | 1999 |
| GC Corporate Services Limited | Transport & logistics | 2016 |
| GC Property Refurbishing Ltd | Construction | 2024 |
| GC Signs Limited | Administrative & support | 2018 |
| GCH Data Limited | Administrative & support | 1999 |
| GCS Credit Ltd | Administrative & support | 2019 |
| Gd&T Academy Limited | Professional & scientific | 2024 |
| GDE Global Limited | Transport & logistics | 2025 |
| GDG London Ltd | Arts & recreation | 2026 |
| Gdms Services London Limited | Information & communication | 2006 |
| GDS Construction Services Ltd | Other services | 2016 |
| GDS Electrical Ltd | Construction | 2023 |
| GDY Limited | Administrative & support | 2007 |
| GDZ Event Analysts Limited | Administrative & support | 2010 |
| GEA Food Solutions UK & Ireland Ltd | Manufacturing | 1996 |
| GEA Mechanical Equipment UK Limited | Wholesale & retail | 1958 |
| Gearboxman Limited | Wholesale & retail | 2013 |
| Geardbike Ltd | Other services | 2024 |
| Gecris Consulting Ltd | Information & communication | 2025 |
| GEE Barbers Limited | Other services | 2023 |
| Geekay Concepts Limited | Other services | 2014 |
| Geeko Vogue Limited | Wholesale & retail | 2021 |
| Geetha IT Solutions Limited | Professional & scientific | 2024 |
| Gegaad Property Investment Limited | Construction | 2026 |
| Gelato and Waffle Limited | Hospitality | 2017 |
| Gelero Ltd | Wholesale & retail | 2024 |
| Gelf Electronics Limited | | 1975 |
| Gelsc LP | | 2007 |
| GEM Golf Clubs Limited | Wholesale & retail | 2025 |
| GEM Media MK Ltd | Information & communication | 2018 |
| Gematech (U.K.) Limited | Information & communication | 1999 |
| Gemhill Services Ltd | Administrative & support | 2013 |
| Gemini Campers Limited | Wholesale & retail | 2022 |
| Gemini Exclusive Care Limited | Health & social care | 2011 |
| Gemini Media-Tw Ltd | Professional & scientific | 2025 |
| Gemini Primary Care Ltd | Health & social care | 2024 |
| Gemini Rail Services UK Ltd | Manufacturing | 2013 |
| Gemma Noble Yoga Ltd | Education | 2020 |
| GEMS4LESS Ltd | Wholesale & retail | 2003 |
| GEN 11 Limited | Wholesale & retail | 2013 |
| GEN Social Agency Ltd | Professional & scientific | 2024 |