| Governance (London) Limited | Professional & scientific | 2014 |
| GPD Limited | Administrative & support | 2015 |
| Gracendirangu Limited | Health & social care | 2018 |
| Gracious Lively Ltd | Administrative & support | 2026 |
| Grades UP Ltd | Education | 2023 |
| Gradesmart Ltd | Education | 2026 |
| Grads Capital Limited | Financial services | 2025 |
| Grand Top Real Estate Ltd | Real estate | 2025 |
| Grant Productions Ltd | Information & communication | 2026 |
| GRC Designs Ltd | Construction | 2023 |
| Greater Estates Ltd. | Real estate | 2020 |
| Green European Limited | Construction | 2019 |
| Green Solutions Slough Limited | Professional & scientific | 2015 |
| Greenecoplus Limited | Administrative & support | 2019 |
| Greentech Landscape Ltd | Construction | 2018 |
| Grewal Ventures Ltd | Administrative & support | 2026 |
| Grocherry Limited | Wholesale & retail | 2024 |
| Ground Point Ltd | Construction | 2025 |
| Grove Property Refurbishments Ltd | Construction | 2019 |
| Growth Atlas Ltd | Information & communication | 2026 |
| Growth Roads Ltd | Administrative & support | 2021 |
| Growtharcade Ltd | Professional & scientific | 2024 |
| Gruplr Limited | Information & communication | 2024 |
| Grzegorz Pukas Ltd | Transport & logistics | 2025 |
| GS Decorlondon Ltd | Construction | 2025 |
| GS Heating & Plumbing Ltd | Construction | 2021 |
| Gsvv Group Ltd | Real estate | 2025 |
| GT Bass Entertainment Limited | Arts & recreation | 2025 |
| GT Legal Advice & Services Ltd | Professional & scientific | 2025 |
| GTB Home Care Services Limited | Health & social care | 2018 |
| GTR Consultants Ltd | Professional & scientific | 2014 |
| GTR Design Ltd | Professional & scientific | 2022 |
| GTR Real Estate Limited | Real estate | 2019 |
| GTY Foods Limited | Wholesale & retail | 2021 |
| GUG Transport Ltd | Transport & logistics | 2026 |
| Gujjar Limited | Transport & logistics | 2025 |
| Gurinder Sanifa Ltd | Transport & logistics | 2024 |
| Gurkha Channel Limited | Information & communication | 2014 |
| Guru Carpet Limited | Wholesale & retail | 2026 |
| Gurung Capital Crest Limited | Real estate | 2026 |
| Gurung Capital Ltd | Real estate | 2026 |
| Gusto Italia Ltd | Hospitality | 2025 |
| Gutechservices Limited | Construction | 2014 |
| GV & Sons Ltd | Wholesale & retail | 2022 |
| GV London Properties Ltd | Real estate | 2026 |
| GVR Import Ltd | Wholesale & retail | 2018 |
| GVS Premier Property Group Ltd | Real estate | 2026 |
| GWF Electrical Ltd | Construction | 2023 |
| GWF Pizza Ltd | Hospitality | 2020 |
| Gymly Ltd | Information & communication | 2025 |
| H & M Medical Limited | Health & social care | 2024 |
| H Adenwalla & Co Limited | Administrative & support | 2018 |
| H Cross Ltd | Transport & logistics | 2026 |
| H Hires Ltd | Administrative & support | 2025 |
| H&I Limited | Wholesale & retail | 2023 |
| H&R Butchers & SON Limited | Wholesale & retail | 2014 |
| H&S Budi Ltd | Transport & logistics | 2016 |
| H&S Food & Wine Ltd | Wholesale & retail | 2025 |
| HA Global Solutions Ltd | Construction | 2023 |
| Habesha Wholesaler Ltd | Extraterritorial | 2020 |
| Hacu Electrical Ltd | Construction | 2021 |
| Hadayah Ltd | Wholesale & retail | 2025 |
| Haddad Innovation Ltd | Real estate | 2020 |
| Hadem Ltd | Other services | 2018 |
| Haem Path Limited | Extraterritorial | 2024 |
| Hair & Beauty Aesthetic by Vertigo Limited | Other services | 2017 |
| Haji Consolidated Resourcing Limited | Professional & scientific | 2015 |
| Hakim & Sons Limited | Wholesale & retail | 2015 |
| Hammer & Hacksaw Ltd | Real estate | 2023 |
| Hamza Retail Ltd | Wholesale & retail | 2026 |
| HAN Hairdresser Ltd | Other services | 2021 |
| Hanecka Ltd | Water & waste | 2017 |
| Hannu Limited | Transport & logistics | 2026 |
| Hanwell Quality Ltd | Wholesale & retail | 2018 |
| Happy Beaver Ltd | Construction | 2025 |
| Happy London Mart Ltd | Wholesale & retail | 2023 |
| Happy Shop Ltd | Wholesale & retail | 2002 |
| Haran News Ltd | Wholesale & retail | 2022 |
| Hare Krishna Enterprise Limited | Wholesale & retail | 2018 |
| Hariets Homes Ltd | Real estate | 2025 |
| Harini Superstore Limited | Wholesale & retail | 2023 |
| Harish Mega Mart Ltd | Wholesale & retail | 2025 |
| Harish VM Limited | Wholesale & retail | 2021 |
| Harken Heating Ltd | Construction | 2021 |
| Harmonic Joinery Ltd | Other services | 2024 |
| Harmony Fulfillment Ltd | Wholesale & retail | 2024 |
| Harmony Global Ltd | Wholesale & retail | 2022 |
| Harmony Housing Estates Ltd | Real estate | 2024 |
| Harrington Vale Private Ltd | Financial services | 2026 |
| Harrow Airport Cars Limited | Transport & logistics | 2025 |
| Harrow HA1 Ltd | Real estate | 2026 |
| Harrow Road Lounge Dessert and Beverages Limited | Hospitality | 2024 |
| Harrow Tech Solutions Ltd | Information & communication | 2015 |
| HAS Property Maintenance Ltd | Construction | 2019 |
| Hause of Amara Ltd | Wholesale & retail | 2025 |
| Haven Hub Limited | Health & social care | 2018 |
| Hawk Labs Ltd | Information & communication | 2026 |
| Hawtrey Investment Ltd | Real estate | 2021 |
| Haysar Commerce Ltd | Wholesale & retail | 2022 |
| Haytch Projects Limited | Construction | 2025 |