| G S Property Investments LLP | | 2011 |
| G Scheul Builder Lanscape & Groundwork Specialist Ltd | Construction | 2025 |
| G Sciama Limited | Arts & recreation | 2016 |
| G Singh and Co UK Ltd | Construction | 2020 |
| G Williams Ophthalmology Limited | Health & social care | 2017 |
| G&A Facades Ltd | Construction | 2012 |
| G&A Freebird Ltd | Health & social care | 2022 |
| G&A UK Property Limited | Real estate | 2021 |
| G&A Unique Fashion Limited | Manufacturing | 2023 |
| G&C Construct Ltd | Construction | 2025 |
| G&C Drylining Ltd | Construction | 2024 |
| G&C Plastering Ltd | Construction | 2024 |
| G&D.Avi Decorator Ltd | Construction | 2024 |
| G&G Traders Ltd | Wholesale & retail | 2017 |
| G&J Dishman Property Holdings Limited | Real estate | 2018 |
| G&M Cleaning Construction Ltd | Construction | 2022 |
| G&M Construct Limited | Construction | 2023 |
| G&S Holding Group Limited | Financial services | 2018 |
| G&V Suppliers Ltd | Construction | 2019 |
| G-Buy Ltd | Wholesale & retail | 2026 |
| G. & D. Higgins Mechanical Services Ltd. | Construction | 1990 |
| G. M. Fleming Limited | Professional & scientific | 2021 |
| G.& F.Phelps Limited | Construction | 1950 |
| G.A.S. Mechanical and Maintenance Services Limited | Construction | 2016 |
| G.C.A. Services Limited | Hospitality | 2007 |
| G.H. Daryani & Co. Limited | Real estate | 1974 |
| G.O.S.Cleaning Ltd | Administrative & support | 2026 |
| G.P.R. (Civil Engineering) Ltd | Administrative & support | 2004 |
| G1 London (Rentals) Limited | Real estate | 2019 |
| G1 London Limited | Construction | 2017 |
| G1(HENDON) Ltd | Real estate | 2026 |
| G1G Health Ltd | Health & social care | 2014 |
| G2SV Limited | Real estate | 2022 |
| G4 ALL Services Limited | Administrative & support | 2024 |
| G4 VIP Close Protection Limited | Administrative & support | 2016 |
| G4TRADERSUK Ltd | Wholesale & retail | 2024 |
| G6 Associates Limited | Administrative & support | 2012 |
| G72 Denim Ltd | Wholesale & retail | 2022 |
| G9 Management Ltd | Real estate | 2021 |
| GA Drylining 2019 Ltd | Construction | 2019 |
| GA8 Limited | Real estate | 2024 |
| Gaaffs & Co Limited | Hospitality | 2019 |
| Gaal Property Ltd | Real estate | 2021 |
| Gaana Nights Ltd | Hospitality | 2025 |
| Gaanabrunch Limited | Hospitality | 2018 |
| Gaap Consulting Ltd | Professional & scientific | 2023 |
| Gaba Logistics Ltd | Transport & logistics | 2026 |
| Gabby Fleming Limited | Professional & scientific | 2019 |
| Gabriel C. Builders Ltd | Construction | 2025 |
| Gabriel Construction Limited | Construction | 2013 |
| Gabriel Daniel Electricals Ltd | Construction | 2017 |
| Gabriel Gherasim Construction Ltd | Construction | 2026 |
| Gabrielle Perez Lettings Limited | Real estate | 1994 |
| Gache Construction Ltd | Construction | 2021 |
| Gadget Central Tech Ltd | Wholesale & retail | 2025 |
| Gadgetplaza Ltd | Wholesale & retail | 2025 |
| Gadgets Tech Box Ltd | Wholesale & retail | 2023 |
| GADGETWORLD25 Ltd | Wholesale & retail | 2025 |
| Gadhia Properties Ltd | Real estate | 2017 |
| Gadyourgets Ltd | Wholesale & retail | 2024 |
| Gael Force Ltd | Construction | 2024 |
| Gaerwyn Properties Ltd | Construction | 2025 |
| Gafiresprinklers Limited | Construction | 2024 |
| Gafney and Associates Limited | Professional & scientific | 2021 |
| Gaheez Ltd | Financial services | 2018 |
| Gaia Evolution Ltd | Other services | 2024 |
| Gaidasenco Ltd | Construction | 2018 |
| Gain Investments Ltd | Real estate | 2024 |
| Gainsborough Construction Limited | Construction | 2006 |
| Gainsborough Court (Seven) Management Company Limited | Real estate | 1993 |
| Gainsley Capital Limited | Real estate | 2018 |
| Gainsley Green Limited | Real estate | 2020 |
| Gainsley Properties Limited | Real estate | 2018 |
| Gajanand Construction Ltd | Construction | 2025 |
| Gajera Estates Ltd | Real estate | 2021 |
| Gajjar Service Ltd | Wholesale & retail | 2020 |
| GAK Group Ltd | Information & communication | 2021 |
| Gala & Sons Ltd | Wholesale & retail | 2018 |
| Gala Business Services Limited | Professional & scientific | 2002 |
| Gala Cleaners Ltd | Administrative & support | 2022 |
| Gala Investments Ltd | Real estate | 2024 |
| Gala Shah & Co Limited | Professional & scientific | 2011 |
| Galaktik Developments Ltd | Real estate | 2019 |
| Galaktik Group Ltd | Financial services | 2019 |
| Galaktik Properties Ltd | Real estate | 2019 |
| Galas Investments Ltd | Financial services | 2020 |
| Galaxy Build Ltd | Construction | 2024 |
| Galaxy Connect Limited | Wholesale & retail | 2007 |
| Galaxy Heating and Cooling Limited | Construction | 2021 |
| Galaxy Investment Group Ltd | Financial services | 2023 |
| Galaxy Kitchen & Bedrooms Ltd | Wholesale & retail | 2021 |
| Galdam Limited | Financial services | 2017 |
| Gale & Co Global Limited | Administrative & support | 2025 |
| Galileo Capital Management Limited | Professional & scientific | 2016 |
| Galileo Consulting Limited | Financial services | 2002 |
| Galina Electrical Ltd | Construction | 2021 |
| Galiocas Technologies Limited | Information & communication | 2020 |
| Gallant IT Ltd | Information & communication | 2019 |
| Galldris Construction Limited | Construction | 1998 |
| Galldris Holdings Limited | Financial services | 2016 |