| G M Bishop Financial Services Limited | Financial services | 2004 |
| G S Pipework Limited | Professional & scientific | 2015 |
| G.D. Bartlett & SON Limited | Real estate | 1997 |
| G.R. Builders Limited | Construction | 1991 |
| G10 Workshop Limited | Administrative & support | 2015 |
| GAK Investments Limited | Real estate | 2021 |
| Game Changers Organisation Limited | Other services | 2023 |
| Gannicox House Management Committee Ltd | Real estate | 1948 |
| Gardener's Way Management Company Limited | Households | 2016 |
| Gardiner Bros. and Company (Leathers) Limited | Wholesale & retail | 1954 |
| Gardiner Bros. and Company Holdings Limited | Wholesale & retail | 2020 |
| Gardiner Group Holdings Limited | Financial services | 2026 |
| Gary Birks Design Ltd | Wholesale & retail | 2011 |
| Gary Birks International Limited | Wholesale & retail | 2025 |
| Gary Lane Services Ltd | Manufacturing | 2008 |
| Gastro Taverns Ltd. | Hospitality | 2014 |
| Gazzard Properties Limited | Real estate | 2015 |
| GB Malmesbury Ltd | Real estate | 2025 |
| GBR Advisory Ltd | Financial services | 2012 |
| Gcsd Accountants Ltd | Professional & scientific | 2018 |
| Geddes Hvac Limited | Professional & scientific | 2005 |
| Gen-B Ltd | Administrative & support | 2025 |
| Gforce Concepts Limited | Manufacturing | 2019 |
| Ghost Consultants Limited | Extraterritorial | 1999 |
| Ghulam Nabi Properties Ltd | Real estate | 2017 |
| Gilmour Gray Limited | Real estate | 1990 |
| Gimlet Limited | Other services | 2007 |
| GK Joinery Limited | Manufacturing | 2005 |
| GLC & R Williams Limited | Manufacturing | 2015 |
| Gloster Technology Limited | Professional & scientific | 1993 |
| Gloucestershire Kitchen Transformations Ltd | Administrative & support | 2017 |
| Gloucestershire Septic Tanks Ltd | Water & waste | 2025 |
| Gloucestershire Water Softeners Ltd | Extraterritorial | 2021 |
| GM Technical Services Ltd | Professional & scientific | 2026 |
| GMB Engineering Services Limited | Manufacturing | 1999 |
| Godsells Cheese LLP | | 2012 |
| Golden Apple Antiques Ltd | Wholesale & retail | 2025 |
| Golden Paws Grooming Ltd | Other services | 2018 |
| Golden Valley Events Ltd | Administrative & support | 2025 |
| Goldenstones Gardening Limited | Administrative & support | 2019 |
| Goldridge Solutions Limited | Manufacturing | 2003 |
| Good Grit Ltd | Professional & scientific | 2013 |
| Goodmile Associates Ltd | Professional & scientific | 2013 |
| Goodmile Management Ltd | Construction | 2001 |
| Goowe Ltd | Wholesale & retail | 2021 |
| Gourmet Food Markets Ltd | Administrative & support | 2010 |
| Governance First Ltd | Professional & scientific | 2015 |
| Gpms Technology Ltd | Professional & scientific | 2008 |
| GPS Enterprises Ltd | Professional & scientific | 2008 |
| Gradintelligence Limited | Extraterritorial | 2015 |
| Grand Jour (Stow) Limited | Extraterritorial | 2013 |
| Grand Jour Limited | Wholesale & retail | 2011 |
| Great Tea Limited | Wholesale & retail | 2025 |
| Greatfield Nurseries and Garden Centre Limited | Wholesale & retail | 2025 |
| Green Diamond Consultancy Ltd | Professional & scientific | 2025 |
| Green Docs Online Limited | Professional & scientific | 2024 |
| Green Scout Property Ltd | Real estate | 2017 |
| Green Turtle Developments Ltd | Construction | 2019 |
| Green Waste Management Services Limited | Water & waste | 2002 |
| Greenfarm Management Company (UK) Ltd | Administrative & support | 2012 |
| Greenrock Horizons Limited | Real estate | 2026 |
| Greenwave Packaging UK Limited | Manufacturing | 2020 |
| Greiner Bio-One Limited | Wholesale & retail | 1992 |
| Grenian Hydrogen Limited | Professional & scientific | 2023 |
| GRG Video Surveillance Ltd | Administrative & support | 2015 |
| Griffith Nobes Lettings and Management Ltd | Real estate | 2023 |
| Group Five (Shoes) Limited | Wholesale & retail | 1973 |
| Grove Cottage Management Co Limited | Extraterritorial | 2018 |
| H. S Decorating Ltd | Construction | 2018 |
| H. Underwood and Sons Limited | Wholesale & retail | 1965 |
| H2VTOL Ltd | Professional & scientific | 2022 |
| Hacolo Limited | Construction | 2012 |
| Haines Green Business Services Ltd | Professional & scientific | 2022 |
| Hallen Energy Ltd | Energy | 2020 |
| Halomec Ltd | Wholesale & retail | 2005 |
| Happy Food 24 Limited | Hospitality | 2024 |
| Happy Odyssey Limited | Professional & scientific | 2023 |
| Haresfield Court Limited | Households | 1984 |
| Haresfield Millpond Associates Limited | Administrative & support | 2000 |
| Harley Consult Ltd | Professional & scientific | 2021 |
| Harleywood Electrical Engineering Ltd | Construction | 2019 |
| Harmony Resource Limited | Administrative & support | 2014 |
| Harper Field Auctioneers and Valuers Limited | Administrative & support | 2010 |
| Harper Field Holdings Ltd | Wholesale & retail | 2020 |
| Harry Daniels Limited | Other services | 2013 |
| Hartwood Heritage Joinery Ltd | Construction | 2018 |
| Haven Consultancy Ltd | Professional & scientific | 2024 |
| HAZWATCH360 Ltd | Information & communication | 2025 |
| HDW Marketing Limited | Professional & scientific | 2018 |
| Health and Leisure Properties Limited | Real estate | 2014 |
| Heat Associates Limited | Professional & scientific | 2006 |
| Helen Ward Limited | Arts & recreation | 2005 |
| Helix Transport Consultants Limited | Professional & scientific | 2010 |
| Hello Ernest Limited | Professional & scientific | 2020 |
| Heng Loon Limited | Hospitality | 2011 |
| Henry Chambers Limited | Professional & scientific | 2023 |
| Henry Ventures Limited | Financial services | 2017 |
| HH Garden Services Ltd | Administrative & support | 2017 |
| Hhwf & Co Limited | Administrative & support | 2017 |
| Hibzahim Limited | Information & communication | 2023 |