| Giraffe Research & Design Limited | Professional & scientific | 2008 |
| Girdagrips UK Ltd | Wholesale & retail | 2010 |
| Girl Gainz Limited | Other services | 2021 |
| Girls+ Rock Sheffield CIC | Education | 2026 |
| Giuman Ltd | Information & communication | 2010 |
| GJ Property Ltd | Real estate | 2016 |
| GJ UK Lifts Ltd | Information & communication | 2016 |
| GJ Vaughan Limited | Real estate | 2026 |
| GJB Building & Joinery Ltd | Other services | 2025 |
| GJH Engineering Services and Consultants Ltd | Manufacturing | 2014 |
| GK Holiday Lettings Ltd | Hospitality | 2023 |
| GK Psych Limited | Professional & scientific | 2020 |
| GK Site Services. Limited | Professional & scientific | 2024 |
| Gkasiytech Ltd | Information & communication | 2025 |
| Gkxdigital Ltd | Information & communication | 2023 |
| GL Cottages Ltd | Real estate | 2025 |
| GL Maintenance Ltd | Administrative & support | 2025 |
| GL Maintenance Solutions Ltd | Manufacturing | 2022 |
| GL Property Holdings Ltd | Real estate | 2020 |
| Glad Cleaning Limited | Administrative & support | 2024 |
| Gladal Media Ltd | Information & communication | 2019 |
| Glade Consultancy Ltd | Health & social care | 2010 |
| Glade Consulting Services Ltd | Professional & scientific | 2017 |
| Gladness PVT Limited | Health & social care | 2017 |
| Gladstone Care Ltd | Other services | 2002 |
| Glam Beauty Salon by T Ltd | Other services | 2026 |
| Glamourama 2019 Limited | Other services | 2019 |
| Glamourous Gowns Ltd | Wholesale & retail | 2025 |
| Glan Soch Limited | Real estate | 2021 |
| Glap Delivery Company Limited | Financial services | 2022 |
| Glasem Limited | Transport & logistics | 2023 |
| Glasgowend Limited | Wholesale & retail | 1981 |
| Glass Ceiling Media Ltd | Professional & scientific | 2018 |
| Glass Floor Systems Ltd | Manufacturing | 2019 |
| Glass House Marketing Ltd | Professional & scientific | 2023 |
| Glass Industry Solutions Limited | Professional & scientific | 2001 |
| Glass Qualifications Authority Limited | Extraterritorial | 2011 |
| Glass Systems Architectural Ltd | Construction | 2012 |
| Glass Technology Services Ltd | Professional & scientific | 1993 |
| Glass Umbrella Limited | Financial services | 2017 |
| Glaves Fabricated Limited | Manufacturing | 2020 |
| Glazing Ltd | Construction | 2019 |
| Gleadless Barber Ltd | Other services | 2026 |
| Gleadless Cafe Ltd | Hospitality | 2025 |
| Gleam Valeting Ltd | Administrative & support | 2019 |
| Gleeson Capital Solutions Limited | Extraterritorial | 2004 |
| Gleeson Classic Homes Limited | Extraterritorial | 1985 |
| Gleeson Construction Services Limited | Construction | 1963 |
| Gleeson Developments (North East) Ltd | Construction | 1999 |
| Gleeson Developments Limited | Construction | 1965 |
| Gleeson Homes Southern Limited | Extraterritorial | 1980 |
| Gleeson Housing Developments Limited | Extraterritorial | 1979 |
| Gleeson Land (Fleet) Limited | Real estate | 2006 |
| Gleeson Land Limited | Real estate | 2004 |
| Gleeson PFI Investments Limited | Extraterritorial | 2005 |
| Gleeson Properties (Kingley) Limited | Extraterritorial | 2004 |
| Gleeson Properties (Petersfield) Limited | Extraterritorial | 2004 |
| Gleeson Properties Limited | Extraterritorial | 1964 |
| Gleeson Regeneration Limited | Construction | 2000 |
| Gleeson Services Limited | Extraterritorial | 1966 |
| Glen Payroll Services Limited | Financial services | 1998 |
| Glencoe Developments Limited | Real estate | 2025 |
| Glendean Construction Limited | Construction | 2002 |
| Glenholm Developments Ltd | Construction | 2022 |
| Glenholme Builders Limited | Construction | 2014 |
| Glenhomes Properties Limited | Real estate | 2015 |
| Glenmill Carpets & Furniture Ltd | Wholesale & retail | 2010 |
| Glenn Day UK Limited | Transport & logistics | 2016 |
| Glenn Ridge Ltd | Wholesale & retail | 2026 |
| Glenn Rogers Contract Limited | Construction | 2016 |
| Glenn Thelwell & Associates Dental Care Limited | Health & social care | 2014 |
| GLENNENTERPRICE4ALLMAN Ltd | Health & social care | 2021 |
| Glenovate Ltd | Professional & scientific | 2024 |
| Glenreed Limited | Financial services | 2017 |
| Glentworth Technical Advisers Limited | Professional & scientific | 2011 |
| Glevy Building Ltd | Construction | 2021 |
| GLF Consulting Ltd | Professional & scientific | 2024 |
| Glide Foundation | Professional & scientific | 2022 |
| Glimmer & Threads Limited | Other services | 2015 |
| Glimmer Scrubbies Ltd | Administrative & support | 2024 |
| Glisten Cleaning Service's by Elise Limited | Other services | 2025 |
| Glitter Ball Promotions Limited | Arts & recreation | 2023 |
| Glitterama Nails Limited | Other services | 2018 |
| Glitzgrow Limited | Wholesale & retail | 2025 |
| GLJ Steel Erecting Ltd | Construction | 2019 |
| GLO Electrical Services Ltd | Construction | 2025 |
| GLO Tanning Swinton Limited | Other services | 2020 |
| Gloam Ltd | Arts & recreation | 2020 |
| Global 2 Leisure Limited | Hospitality | 2012 |
| Global Academy for Training and Development Ltd | Education | 2009 |
| Global Ace Ltd | Administrative & support | 2006 |
| Global Alloys Limited Partnership | | 1996 |
| Global Architectural Openings Solutions Ltd | Wholesale & retail | 2024 |
| Global Child Protection Services Ltd | Professional & scientific | 2008 |
| Global COM Enterprise Ltd | Wholesale & retail | 2019 |
| Global Construction Solutions AI Ltd | Professional & scientific | 2025 |
| Global Construction Solutions Limited | Professional & scientific | 2009 |
| Global Credit Management Limited | Administrative & support | 2022 |
| Global Deal Mall Ltd | Wholesale & retail | 2024 |
| Global Dental Scheme Limited | Financial services | 2019 |