| GIA Commerce Ltd | Wholesale & retail | 2026 |
| GIA Holidays Limited | Administrative & support | 2023 |
| GIA Motors Ltd | Wholesale & retail | 2023 |
| GIA Properties Ltd | Real estate | 2020 |
| GIA RAE Limited | Financial services | 2025 |
| GIA Trans Ltd | Transport & logistics | 2017 |
| GIA Travel UK Limited | Administrative & support | 2016 |
| Gian & Dass Limited | Real estate | 2023 |
| Gianna UK Limited | Manufacturing | 2019 |
| Giant Dragon Technology Company Limited | Information & communication | 2021 |
| Giant Property Management Ltd | Real estate | 2020 |
| Giant Source Limited | Households | 2023 |
| Giant’S Group Services Ltd | Transport & logistics | 2016 |
| Gibair FM Limited | Administrative & support | 2024 |
| Gibair Holdings Limited | Financial services | 2024 |
| Gibair Limited | Energy | 2021 |
| Gibbins Properties Limited | Real estate | 2015 |
| Gibbons Ecom Ltd | Wholesale & retail | 2026 |
| Gibbons Fans Limited | Manufacturing | 2015 |
| Gibbs Building Service Ltd | Construction | 2026 |
| Gibbs Surfacing Limited | Construction | 1995 |
| Gibburn Mechanical Services Limited | Wholesale & retail | 1977 |
| Gibcom Marketing Support Ltd | Professional & scientific | 2019 |
| Gibi Ltd | Transport & logistics | 2022 |
| Gibson Midco Ltd | Financial services | 2020 |
| Gibson&Zettle Ltd | Health & social care | 2025 |
| Gibsons Kitchens Limited | Construction | 2016 |
| GID Services Ltd | Construction | 2025 |
| Gidcen Ltd | Construction | 2017 |
| Giddy Robot Limited | Information & communication | 2011 |
| Gidney Holdings Limited | Construction | 1981 |
| Gidney Investments Limited | Construction | 2004 |
| Gifford Properties Limited | Real estate | 2024 |
| Gifford Stanley Holdings Limited | Financial services | 2025 |
| Gifford Stanley Ltd | Real estate | 2017 |
| Gift Advisory Ltd | Professional & scientific | 2020 |
| Gift Expressions Ltd | Administrative & support | 2025 |
| Gift in CAN Ltd | Wholesale & retail | 2013 |
| Gift Logistic Ltd | Transport & logistics | 2014 |
| Gift on Door Limited | Wholesale & retail | 2023 |
| Gift Wellness Limited | Wholesale & retail | 2012 |
| Giftbox Solutions Limited | Administrative & support | 2007 |
| Gifted by Maryam (GBM) Ltd | Manufacturing | 2026 |
| Giftedtreasures Limited | Wholesale & retail | 2025 |
| Gifthype Ltd | Wholesale & retail | 2025 |
| Giftourier Trading Ltd | Wholesale & retail | 2023 |
| Gifts by Anna Ltd | Wholesale & retail | 2020 |
| Gifts International Limited | Real estate | 2002 |
| Gifts of Distinction Ltd. | Wholesale & retail | 2014 |
| Giftsign Limited | Professional & scientific | 1986 |
| Gifty Ltd | Wholesale & retail | 2024 |
| Giga Moto Gears Ltd | Manufacturing | 2023 |
| Gigabit Innovation Solutions Ltd | Manufacturing | 2024 |
| Gigabit Sales & Rental Ltd | Wholesale & retail | 2023 |
| Gigabit Telecom Ltd | Information & communication | 2024 |
| Gigabrainz Limited | Wholesale & retail | 2023 |
| Giggle Wiggle & Grow Ltd | Arts & recreation | 2025 |
| Giggz Telecom Limited | Other services | 2017 |
| Gigi Solutions Limited | Information & communication | 2022 |
| Gilan Barbers UK Ltd | Other services | 2024 |
| Gilani &Co Solicitors Ltd | Professional & scientific | 2024 |
| Gilanis International Limited | Transport & logistics | 2021 |
| Gildersome Investments Ltd | Real estate | 2019 |
| Gildup Ltd | Professional & scientific | 2019 |
| Gildwork Services Ltd | Administrative & support | 2025 |
| Gilgal, Birmingham | Health & social care | 2003 |
| Gill Airways Ltd | Transport & logistics | 2025 |
| Gill Amenities Limited | Administrative & support | 2026 |
| Gill Autos Ltd | Wholesale & retail | 2013 |
| Gill Civil Engineering Limited | Construction | 2000 |
| Gill Developers Ltd | Real estate | 2020 |
| Gill Developments Limited | Real estate | 2003 |
| Gill Group Foundation | Health & social care | 2008 |
| Gill Group Limited | Construction | 2010 |
| Gill Investment Group Ltd | Real estate | 2023 |
| Gill Investments Limited | Extraterritorial | 2003 |
| Gill Knitwear Limited | Extraterritorial | 1982 |
| Gill Mechanical Holdings Limited | Professional & scientific | 2008 |
| Gill Property Developments Ltd | Real estate | 2025 |
| Gill Property Group Limited | Real estate | 2003 |
| Gill Property Solutions Limited | Real estate | 2025 |
| Gill RAI Partners Ltd | Real estate | 2025 |
| Gill Services UK. Ltd | Construction | 2022 |
| Gill Trade Frames Ltd | Manufacturing | 2024 |
| Gill Trade Ltd | Wholesale & retail | 2021 |
| Gill View Developments Limited | Construction | 2019 |
| Gill-Bhogal Optometric Services Limited | Health & social care | 2009 |
| Gill-Mann Investments Limited | Real estate | 2017 |
| Gill-Mann Medical Limited | Health & social care | 2015 |
| Gillani Holdings Limited | Financial services | 2021 |
| Gillato Limited | Real estate | 2019 |
| Gillespie & Jackson Limited | Extraterritorial | 2008 |
| Gillhurst Property Ltd | Construction | 2024 |
| Gillicci Clothing Co Limited | Wholesale & retail | 2011 |
| Gillicci Properties Limited | Real estate | 2023 |
| Gillity Trading Ltd | Hospitality | 2025 |
| Gillman Group Limited | Administrative & support | 1996 |
| Gillman Group Services Ltd. | Construction | 1958 |
| Gillott Properties Limited | Real estate | 2016 |
| Gillram Limited | Education | 2007 |