| Global Connection Network Ltd | Construction | 2024 |
| Global Management and Skills Solutions Limited | Professional & scientific | 2025 |
| Gloss White Limited | Financial services | 2024 |
| Gmreagency Ltd | Real estate | 2026 |
| GND One Co Limited | Professional & scientific | 2016 |
| GO4DETAILZ Ltd | Wholesale & retail | 2025 |
| Golden EYE Homecare Limited | Administrative & support | 2023 |
| Good Selfish Limited | Extraterritorial | 2017 |
| Gowsi International Limited | Wholesale & retail | 2019 |
| Graceful Group Services Ltd | Health & social care | 2023 |
| Graham Puttock Design Ltd | Professional & scientific | 2019 |
| Gratia Database Services Limited | Information & communication | 2025 |
| Great Coverden Management Company Limited | Administrative & support | 2004 |
| Green Leaves Countryside Contractors Ltd | Agriculture & fishing | 2006 |
| Green Retrofits Limited | Construction | 2022 |
| Greenfields Caravan & Motorhome Servicing Ltd | Manufacturing | 2017 |
| Greenleaf Consultancy Limited | Professional & scientific | 2002 |
| Gremlin Dance Limited | Arts & recreation | 2008 |
| Griffin Electrical Solutions Limited | Construction | 2016 |
| Grist Brothers Ltd | Wholesale & retail | 2024 |
| Groceryaid Trading Limited | Health & social care | 1994 |
| Guidizy Ltd | Information & communication | 2024 |
| Gunda Pari Ltd | Manufacturing | 2020 |
| Gupta Distribution Services Limited | Transport & logistics | 2020 |
| Gurkha Rides Limited | Transport & logistics | 2026 |
| Gymwork Limited | Administrative & support | 2006 |
| Hadleigh Associates Limited | Professional & scientific | 1995 |
| Hailey Garage Equipment Services Limited | Manufacturing | 2014 |
| Haldane House Limited | Health & social care | 2011 |
| Hallam Mews Management Company Limited | Households | 1993 |
| Hallmark Plumbing & Heating Ltd | Construction | 2011 |
| Hamilton Nash Limited | Administrative & support | 2017 |
| Happy Dogz and Catz Ltd | Other services | 2025 |
| Happy Horsebox Hire Ltd | Administrative & support | 2024 |
| Happy Norbert Ltd | Construction | 2019 |
| Hardwicke's Premium Produce Limited | Wholesale & retail | 2024 |
| Harefield Limited | Professional & scientific | 1935 |
| Harris Healthcare Europe Limited | Information & communication | 2007 |
| Hart Corporation Ltd. | Professional & scientific | 1995 |
| Hart Marketing Services Limited | Real estate | 2001 |
| Hart Promotions Limited | Financial services | 1999 |
| HAT Trick 5 a Side Ltd | Arts & recreation | 2025 |
| HD Forklift Services Limited | Manufacturing | 2023 |
| Heart of Gold Jewellers Holding Limited | Other services | 2016 |
| Heart of Gold Jewellers Limited | Wholesale & retail | 2008 |
| Heathlands Grow Your Own Ltd | Agriculture & fishing | 2015 |
| Hedgehog Consultancy Limited | Professional & scientific | 2015 |
| Hedgerite Gardens Limited | Administrative & support | 2014 |
| HLR Utilties Ltd | Energy | 2024 |
| Hodges Coaches (Sandhurst) Limited | Transport & logistics | 1962 |
| Hollow Souls Ltd | Wholesale & retail | 2024 |
| Home Wood Stoves Ltd | Wholesale & retail | 2009 |
| Homefix Construction UK Ltd | Construction | 2023 |
| Homefix Group Limited | Construction | 2024 |
| Hospitality Sense Ltd | Hospitality | 2024 |
| House of Kush-Kush Ltd | Wholesale & retail | 2023 |
| Howard Oliver Design Limited | Wholesale & retail | 2021 |
| Hrafn Solutions Ltd | Professional & scientific | 2024 |
| Hrtdeliver Limited | Transport & logistics | 2025 |
| HS2L Properties Ltd | Construction | 2018 |
| Hsmcs Ltd | Information & communication | 2020 |
| Hydrogard Legal Services Limited | Administrative & support | 2016 |
| I-Bill Technologies Limited | Information & communication | 2017 |
| I-Prints (Wokingham) Ltd | Wholesale & retail | 2025 |
| Ideallio Limited | Information & communication | 2014 |
| Igotü Ltd | Information & communication | 2025 |
| Iguana Solutions Limited | Hospitality | 2018 |
| Imperial Capital Limited | Information & communication | 2007 |
| Incrementally AI Ltd | Information & communication | 2026 |
| Inetworx Limited | Information & communication | 2021 |
| INNOVE8 Limited | Information & communication | 2025 |
| Innovex Technical Solutions Limited | Information & communication | 2024 |
| Insightsteps Limited | Administrative & support | 2026 |
| Institute of Concrete Technology(The) | Other services | 1985 |
| Intepro UK Limited | Manufacturing | 2006 |
| Istanbul Fish and Chips Ltd | Hospitality | 2026 |
| IT Enterprise Limited | Information & communication | 2001 |
| J LEE Roofing Limited | Construction | 2025 |
| J M Smith Plant Limited | Administrative & support | 2021 |
| J R Welch Limited | Construction | 2020 |
| J&K Food Services Ltd | Hospitality | 2017 |
| J.D.B. Contractors Limited | Other services | 1974 |
| Jade Lake Limited | Wholesale & retail | 2019 |
| Jahan's Property Limited | Households | 2026 |
| Jahans Kitchen Ltd | Hospitality | 2018 |
| JAI MC Services Limited | Transport & logistics | 2023 |
| James Brooks Holdings Ltd | Financial services | 2021 |
| Jarich Property Limited | Households | 2012 |
| Jaygo Productions Limited | Information & communication | 2010 |
| JC Suppliers Ltd | Hospitality | 2023 |
| Jcdo Electronics Ltd | Manufacturing | 2025 |
| JDM Property Consultants Ltd | Real estate | 2000 |
| JDM Property Management Ltd | Real estate | 2012 |
| JDP Developments Ltd | Construction | 2018 |
| Jenny Healthcare Ltd | Health & social care | 2014 |
| Jessica Diamond Official Ltd | Arts & recreation | 2023 |
| Jewelworkx Ltd | Wholesale & retail | 2021 |
| JGC Collectables Ltd | Wholesale & retail | 2022 |
| Jieli Restaurant Ltd | Hospitality | 2022 |
| Jimee (RAI) Upliftment Society UK Branch | Other services | 2017 |