| Greytech Solutions Ltd | Financial services | 2012 |
| Greywood Motorcycles Limited | Wholesale & retail | 2012 |
| Grid Charge Ltd | Information & communication | 2025 |
| Grid Powr (UK) Ltd | Professional & scientific | 2021 |
| Grid Powr Ltd | Extraterritorial | 2025 |
| Griffinic Ltd | Information & communication | 2021 |
| Griffs Vehicles Ltd | Wholesale & retail | 2024 |
| Grisdale-Form Ltd | Other services | 2020 |
| GRL People Consulting Limited | Administrative & support | 2024 |
| Groovearts Ltd | Wholesale & retail | 2025 |
| Groovykindanails Ltd | Wholesale & retail | 2023 |
| Grosvenor Hall Bournemouth Management Limited | Households | 1975 |
| Grosvenor National Limited | Extraterritorial | 2012 |
| Grosvenor Pines Freehold Limited | Households | 2007 |
| Grosvenor Pines Management Limited | Households | 1993 |
| Ground Truth Engineering Ltd | Information & communication | 2024 |
| Ground UP Building Services Ltd | Construction | 2018 |
| Groundplane Ltd | Information & communication | 2026 |
| Group 719 Limited | Wholesale & retail | 2025 |
| Group Momentum (Salons) Ltd | Extraterritorial | 1991 |
| Group Momentum Ltd | Administrative & support | 2012 |
| Group MVP Ltd | Wholesale & retail | 2025 |
| Grove Commercial & Valeting Services Ltd | Administrative & support | 2025 |
| Grove Construction (Southern) Ltd | Construction | 2015 |
| Grove Gardens Freehold Limited | Households | 2003 |
| Grovewise Consultants Limited | Administrative & support | 2002 |
| Grow Tube Ltd | Wholesale & retail | 2023 |
| Growth on TAP Ltd | Professional & scientific | 2022 |
| Growth Plug Media Limited | Wholesale & retail | 2025 |
| Growth Wave Consulting Ltd | Professional & scientific | 2018 |
| Growthpropertyuk Ltd | Real estate | 2025 |
| Gruss Tech Ltd | Information & communication | 2019 |
| Gryphin Services Ltd | Administrative & support | 2025 |
| Gryphon Homes Ltd | Construction | 2023 |
| GS Business Consultancy Ltd | Professional & scientific | 2019 |
| GSE Tool Holdings Limited | Manufacturing | 2017 |
| GSM Billing Limited | Information & communication | 2011 |
| GSM Construction Ltd | Construction | 2008 |
| GSM Eco Limited | Extraterritorial | 2012 |
| GSN Distributions Ltd | Wholesale & retail | 2026 |
| GSR Brasil Negocios Limited | Wholesale & retail | 2025 |
| GSS23 Ltd | Wholesale & retail | 2025 |
| Guicha Coffee Limited | Hospitality | 2017 |
| Guided Data Analytics Solutions Limited | Information & communication | 2025 |
| Guildford Orthopaedics LLP | | 2023 |
| Guildhall Restaurant Ltd | Hospitality | 2020 |
| Guinea Maintenance Limited | Construction | 2016 |
| Guitar Mania Ltd. | Wholesale & retail | 2002 |
| Guldede Estates Limited | Real estate | 2023 |
| Gulls Ridge Freehold Limited | Households | 2005 |
| Gulls Ridge Management Company Limited | Households | 1999 |
| GUM Science Limited | Health & social care | 2024 |
| Gumbies Ltd | Wholesale & retail | 2006 |
| Gumbrella Limited | Financial services | 2026 |
| Gundog Group Ltd | Real estate | 2015 |
| Guntrip Ltd | Manufacturing | 2025 |
| Gurbanal Limited | Wholesale & retail | 2024 |
| Gurbanov Media Group Ltd | Wholesale & retail | 2025 |
| Gurkha Catering Company Limited | Hospitality | 2007 |
| Gursec Ltd | Construction | 2018 |
| GUS & Bella Ltd | Wholesale & retail | 2020 |
| Guush Ltd | Wholesale & retail | 2023 |
| GUY Blackbeard Consulting Ltd | Wholesale & retail | 2023 |
| GVG Global BR Limited | Wholesale & retail | 2025 |
| Gvmt Ltd | Health & social care | 2013 |
| Gvns Consultancy Limited | Professional & scientific | 2022 |
| GWA Limited | Professional & scientific | 1998 |
| Gwendrock Limited | Professional & scientific | 2002 |
| GY Poole Ltd | Hospitality | 2025 |
| Gym Class Heroes Clothing Ltd | Wholesale & retail | 2018 |
| Gymtitans Limited | Wholesale & retail | 2018 |
| H & D Poole Ltd | Construction | 2022 |
| H & H Investments (Dorset) Ltd | Real estate | 2017 |
| H & H Medical Services Ltd | Health & social care | 2009 |
| H & H Properties (Southern) Limited | Real estate | 1999 |
| H & J Digital Business Ltd | Wholesale & retail | 2025 |
| H & L Construction (Dorset) Ltd | Construction | 2021 |
| H a Lauste Construction and Landscaping Ltd | Construction | 2018 |
| H Blendz Ltd | Other services | 2026 |
| H D Dental Care Limited | Health & social care | 2018 |
| H D Dental House Limited | Health & social care | 2026 |
| H D Developments & Property Limited | Professional & scientific | 2024 |
| H F Crowfoot Limited | Transport & logistics | 2016 |
| H Hughes Training Limited | Transport & logistics | 2024 |
| H Three Limited | Wholesale & retail | 2009 |
| H&H Technologies Ltd | Information & communication | 2026 |
| H&S Homebound Ltd | Real estate | 2020 |
| H&W Group Services Limited | Professional & scientific | 1997 |
| H. E. Cole Ltd | Health & social care | 2023 |
| H. Kellaway Electrical Contractors Limited | Construction | 2003 |
| H.A.B Group Ltd | Real estate | 2022 |
| H.D.A. Associates Limited | Professional & scientific | 1986 |
| H.L.Instruments Limited | Manufacturing | 1953 |
| H.N. Sons Ltd | Wholesale & retail | 2025 |
| H.S. Plant Hire Limited | Wholesale & retail | 2006 |
| H2 Electrics Ltd | Construction | 2021 |
| H20 Tech UK Limited | Water & waste | 2010 |
| H2W Strategies (SPJ) Ltd | Information & communication | 2025 |
| H73 Barbers Ltd | Other services | 2020 |
| HA Groundworks Ltd | Construction | 2026 |