| Gladsome Limited | Professional & scientific | 2021 |
| Glass of Murano Ltd | Wholesale & retail | 2021 |
| Glen Andred Management Company Limited | Households | 1993 |
| Glenda Court Management Company Limited | Real estate | 2018 |
| Glendish Consulting Limited | Professional & scientific | 2025 |
| Glenealy Consulting Limited | Professional & scientific | 2022 |
| Glenmor Consulting Limited | Professional & scientific | 2020 |
| Globe Academy Limited | Arts & recreation | 2024 |
| Globital Consulting Limited | Information & communication | 2017 |
| Glorium Homes Ltd | Construction | 2017 |
| Gloucester Close Limited | Households | 1996 |
| Glyn-Afon Property Co Limited | Real estate | 1956 |
| Go Whistle Limited | Information & communication | 2017 |
| Goater & Associates Consultancy Ltd | Professional & scientific | 2014 |
| Godlingston Manor Farm Limited | Agriculture & fishing | 2011 |
| Godlingston Manor Springs Limited | Water & waste | 1990 |
| Goldcroft Court (Weymouth) Limited | Households | 1995 |
| Golden Pear Limited | Professional & scientific | 1996 |
| Golden Scallops Ltd | Wholesale & retail | 2023 |
| Gommersall Surgical Services Limited | Health & social care | 2011 |
| Good Influence Limited | Professional & scientific | 2023 |
| Goodfellow Electrical Solutions Ltd | Construction | 2018 |
| Gooisoft Limited | Information & communication | 2012 |
| Gould Inspection Ltd | Professional & scientific | 2022 |
| GP Eead Limited | Information & communication | 2017 |
| Gracemary Ltd | Manufacturing | 2017 |
| Graham Brookes Consulting (GBC) Limited | Professional & scientific | 2005 |
| Grant Surfacing Limited | Construction | 2002 |
| Grant Taylor Accountants Limited | Professional & scientific | 2013 |
| Grapefruit Graphics Limited | Professional & scientific | 2003 |
| Great Cranford Street Management Company Limited | Households | 2008 |
| Great Guitar Build OFF Ltd | Information & communication | 2021 |
| Great Western Camping (UK) Limited | Wholesale & retail | 2011 |
| Green & Whyte Bespoke Caterers Ltd | Administrative & support | 2017 |
| Green Generation (UK) Limited | Manufacturing | 2014 |
| Green Jersey Cycling Tours Limited | Administrative & support | 2012 |
| Green Martinstown Community Interest Company | Professional & scientific | 2021 |
| Green Park Content Limited | Information & communication | 2014 |
| Green Sparks Southwest CIC | Education | 2022 |
| Green Tea Limited | Professional & scientific | 2010 |
| Green Valley Yurts Limited | Hospitality | 2012 |
| Greenacre Court (Yeovil) Limited | Households | 2006 |
| Greenhaven Group Limited | Administrative & support | 2016 |
| Greenhills Global Limited | Real estate | 2024 |
| Greenmantle Estates Limited | Administrative & support | 2007 |
| Greenteepee Limited | Construction | 2020 |
| Greenweald Ltd | Agriculture & fishing | 2008 |
| Greenwood Tree Property Services Ltd | Construction | 2017 |
| Gregory & Tapping Properties Ltd | Real estate | 2021 |
| Gregson Consultancy Ltd | Professional & scientific | 2021 |
| Grenville Flats Freehold Ltd | Households | 2026 |
| Gresham Partners UK Ltd | Financial services | 2020 |
| Greystone Building Contractors Limited | Construction | 2016 |
| Griffith Time Machines (GTM) Limited | Professional & scientific | 2026 |
| Grimshaw-Fraquelli Wine Ltd | Manufacturing | 2024 |
| Grinning Dog Records Ltd | Wholesale & retail | 2020 |
| Grizzly Air Surveillance Ltd | Information & communication | 2023 |
| Grnd Ltd | Wholesale & retail | 2018 |
| Grounded Coffee Events Ltd | Hospitality | 2023 |
| Grounded Coffee Roasters Ltd | Wholesale & retail | 2020 |
| Grove Centre Properties Limited | Real estate | 2008 |
| Grove Court (Dorchester) Management Company Limited | Households | 1982 |
| Grove Dorchester Car Spa Ltd | Other services | 2025 |
| Growing Energy Limited | Manufacturing | 2013 |
| Growth Yard Limited | Information & communication | 2018 |
| Gruberchacha Limited | Manufacturing | 2015 |
| Gryffe Engineering Limited | Professional & scientific | 2014 |
| GS Food Limited | Wholesale & retail | 2023 |
| GT Design & Engineering Limited | Professional & scientific | 2024 |
| Guardian Lettings Ltd | Real estate | 2023 |
| Guardian Roofs Dorset Ltd | Construction | 2016 |
| Gungho Marketing Limited | Administrative & support | 2007 |
| Guntec Limited | Wholesale & retail | 2025 |
| GUY Watson Legal Services Limited | Professional & scientific | 2023 |
| H & J Doonan Properties Limited | Real estate | 2015 |
| H Barnes & Co Ltd | Administrative & support | 2014 |
| H Cassidy Ltd | Professional & scientific | 2024 |
| H E J O'Brien Limited | Extraterritorial | 2003 |
| H Tozer and SON Limited | Administrative & support | 2013 |
| H&L Healthcare Ltd | Administrative & support | 2019 |
| H&N Roofing Ltd | Construction | 2017 |
| H.E Smiles Ltd | Health & social care | 2019 |
| H.J. Hussey Limited | Extraterritorial | 2007 |
| H.W.J. Haward Limited | Construction | 2024 |
| Haddon House Hotel Ltd | Hospitality | 2014 |
| Haigh Park View Limited | Real estate | 2020 |
| Haigh Park View Properties Limited | Real estate | 2020 |
| Haime Roofing Limited | Construction | 2024 |
| Hair at the Academy Ltd | Other services | 2015 |
| Haldon Property Management Limited | Real estate | 2018 |
| Halften Ltd | Hospitality | 2023 |
| Hallett Decor Limited | Construction | 2007 |
| Halo Automotive Ltd | Wholesale & retail | 2018 |
| Halo Collection Ltd | Financial services | 2026 |
| Halo Fine Art Limited | Wholesale & retail | 2022 |
| Halstock House Management Company Limited | Households | 2023 |
| Hambledon Design Company Ltd | Professional & scientific | 2024 |
| Hambrook Electrical Ltd. | Construction | 2011 |
| Hamdon View Windows Ltd | Administrative & support | 2015 |
| Hames Associates Finplan Limited | Administrative & support | 2014 |