| Gretton Peck Mortgage Services Limited | Financial services | 2019 |
| Greville House Care Home Limited | Health & social care | 2011 |
| Grey Bear PUB Company Ltd | Hospitality | 2025 |
| Grey Tea Limited | Information & communication | 2020 |
| Greypillar Trading Ltd | Wholesale & retail | 2025 |
| Greystone Auctions Ltd | Extraterritorial | 2025 |
| Greystone Business Advisers Ltd. | Professional & scientific | 2013 |
| Greystone Capital Holdings Ltd | Extraterritorial | 2020 |
| Greystone Transport Limited | Transport & logistics | 2025 |
| Greystones Holdings Limited | Real estate | 2017 |
| Grid Power Ltd | Construction | 2023 |
| Grid Software Limited | Information & communication | 1992 |
| Grid Technologies Limited | Information & communication | 2007 |
| Gridcap Ltd | Information & communication | 2026 |
| Griffin Logistics & Distribution Ltd | Transport & logistics | 2019 |
| Griffins Heads HQ Limited | Hospitality | 2024 |
| Grigo Speed Ltd | Transport & logistics | 2025 |
| Grilla Smash Ltd | Hospitality | 2025 |
| Grillz by Shamz Limited | Wholesale & retail | 2023 |
| Grimthread Ltd | Manufacturing | 2025 |
| Grinsells Building Contractors Ltd | Extraterritorial | 2021 |
| Grinsells Skip Hire Limited | Water & waste | 1990 |
| Grinsells Waste Management Limited | Water & waste | 2019 |
| Groovo Ltd | Wholesale & retail | 2025 |
| Ground Beetle Ltd | Public administration | 2018 |
| Group DF Ltd | Professional & scientific | 2024 |
| Grove Property Estates Limited | Construction | 2021 |
| Growing Greener Garden Services (Commercials) Limited | Administrative & support | 2021 |
| Growing Greener Garden Services Ltd | Administrative & support | 2015 |
| Growing Together Education and Wellbeing CIC | Education | 2026 |
| Grozo Ltd | Wholesale & retail | 2026 |
| GRS Retailers Ltd | Wholesale & retail | 2024 |
| Grub Gains Ltd | Hospitality | 2025 |
| GS Building Constructions Ltd | Construction | 2023 |
| GS Gill Cargo Ltd | Transport & logistics | 2025 |
| GS Gill Courier Ltd | Transport & logistics | 2017 |
| GS Top Ltd | Construction | 2025 |
| GS7 Properties Ltd | Real estate | 2023 |
| GSB Directions Limited | Information & communication | 2017 |
| GSC Cars Ltd | Wholesale & retail | 2025 |
| GSD Property Portfolio Limited | Real estate | 2026 |
| GSG Building Construction Ltd | Construction | 2025 |
| GSG Consulting Ltd | Professional & scientific | 2015 |
| GSG Prop Co Ltd | Construction | 2025 |
| GSK Transport Ltd | Transport & logistics | 2023 |
| GSK Transport Solutions Ltd | Transport & logistics | 2025 |
| GSL HSE Consultancy Limited | Professional & scientific | 2026 |
| GSL Leather Company Ltd | Wholesale & retail | 2022 |
| GSM Building & Construction Limited | Construction | 2016 |
| GSR Property Group Ltd | Hospitality | 2025 |
| GSS Security & Electrical Ltd | Construction | 2019 |
| Gsss Holding Ltd | Real estate | 2025 |
| GST Haulage Ltd | Transport & logistics | 2024 |
| GSZ Group Limited | Real estate | 2025 |
| GT Construction & Restoration Ltd | Construction | 2022 |
| GT MG Spares Limited | Manufacturing | 2012 |
| GT Road Solutions Ltd | Transport & logistics | 2018 |
| GT Serv Limited | Wholesale & retail | 2023 |
| GT Window Installations & Maintenance Limited | Manufacturing | 2014 |
| GTD Property Ltd | Real estate | 2018 |
| GTE Transport Limited | Transport & logistics | 2003 |
| GTR GAS Services Limited | Construction | 2017 |
| Guardian Applications Ltd | Information & communication | 2026 |
| Guardian Fostering Ltd | Health & social care | 2023 |
| Guardian Homes (Midlands) Ltd | Hospitality | 2011 |
| Guardian Smart Reception Ltd | Information & communication | 2016 |
| Guidance&Support Ltd | Administrative & support | 2025 |
| Guideline Managements Limited | Extraterritorial | 1980 |
| Guigsy Electrical Limited | Construction | 2013 |
| Guild of AI Limited | Information & communication | 2026 |
| Guildford Developments Ltd | Real estate | 2019 |
| Gujjar TM Ltd | Construction | 2024 |
| GUL Services Limited | Wholesale & retail | 2024 |
| Gummy Box Limited | Wholesale & retail | 2016 |
| Gumpy Ltd | Hospitality | 2024 |
| Gunson Limited | Professional & scientific | 2004 |
| Gurbax Capital Ltd | Real estate | 2026 |
| Gurjit Singh Enterprises Ltd | Wholesale & retail | 2026 |
| Gurkha Mountain Ltd | Hospitality | 2024 |
| Gurpreet Group Limited | Information & communication | 2025 |
| Guruji Services Ltd | Transport & logistics | 2024 |
| Gutazie Engineering Ltd | Manufacturing | 2017 |
| Guymers Holdings Limited | Financial services | 2021 |
| Gvocd Ltd | Transport & logistics | 2025 |
| Gvsb Ltd | Construction | 2026 |
| GWD Delivery Logistics Ltd | Transport & logistics | 2025 |
| GWD Flooring Ltd | Construction | 2015 |
| Gyan Connected CIC | Education | 2026 |
| Gyebua Limited | Professional & scientific | 2022 |
| Gymbrace Ltd | Wholesale & retail | 2025 |
| Gymcredible Clothing Ltd | Wholesale & retail | 2022 |
| Gymplode Ltd | Wholesale & retail | 2024 |
| Gypsy Drip Ltd | Wholesale & retail | 2020 |
| GYS Oralcare Ltd | Health & social care | 2020 |
| H & S Industrial Cleaning Services Limited | Administrative & support | 2003 |
| H & Z Consulting Ltd | Information & communication | 2011 |
| H and S Open Consultants Ltd | Professional & scientific | 2025 |
| H D C Nationwide Ltd | Construction | 2024 |
| H D Contracts Ltd | Construction | 2016 |
| H Goodwin (Castings) Limited | Manufacturing | 2002 |