| Grales Limited | Professional & scientific | 2008 |
| Green Ice Retail Ltd | Wholesale & retail | 2025 |
| Green Quarry Limited | Construction | 2015 |
| Green Space Property Ltd | Real estate | 2023 |
| Greenlane Accounting Limited | Professional & scientific | 2013 |
| Greentree Mobile Showers UK Limited | Administrative & support | 2017 |
| Gruffs Cafe Limited | Hospitality | 2022 |
| GSW.ONLINE24 Ltd | Wholesale & retail | 2024 |
| Gwrw Property Ltd | Real estate | 2025 |
| H@Ws Ltd | Health & social care | 2025 |
| Hadspen Hogs & Logs Ltd | Wholesale & retail | 2022 |
| Halland Renewables Limited | Energy | 2025 |
| Hand Breaks Ltd | Real estate | 2018 |
| Hannah Laura Medic Ltd | Health & social care | 2024 |
| Hanway Taylor Ltd | Professional & scientific | 2013 |
| Hardy Aggregates Ltd | Wholesale & retail | 2025 |
| Harmony Within Limited | Health & social care | 2025 |
| Harp Farm Renewables Limited | Energy | 2024 |
| Harperley Lane Solar Park Limited | Energy | 2024 |
| Harrett & Tyle Partners Limited | Professional & scientific | 2011 |
| Harvard Club of the United Kingdom Limited | Other services | 2014 |
| Hashem Partners Limited | Financial services | 2011 |
| Haskins Furniture Shepton Mallet Limited | Wholesale & retail | 2009 |
| Havyatt Manor Ltd | Hospitality | 2010 |
| Hazardscope Ltd | Wholesale & retail | 2012 |
| Healthy Pursuit Ltd | Professional & scientific | 2018 |
| Hearthworks Limited | Arts & recreation | 2007 |
| Helen Pike Ltd | Professional & scientific | 2020 |
| HFB Property Management and Services Ltd | Households | 2026 |
| Hidden Mowbray Limited | Real estate | 2020 |
| High Bridge Farm Renewables Limited | Energy | 2025 |
| High Grade Builders of Bath Limited | Construction | 2021 |
| High Street Brand of Vipe Ltd | Other services | 2024 |
| Higher Farming Payroll Limited | Manufacturing | 2025 |
| Higher Wraxall Solar Park Limited | Energy | 2020 |
| Highways Plus Ltd | Construction | 2023 |
| Hill & Hill Ground Maintenance Ltd | Administrative & support | 2021 |
| HMC Funding Limited | Financial services | 2020 |
| Hobbesconsultancy Limited | Professional & scientific | 2025 |
| Hobhouse Limited | Wholesale & retail | 2013 |
| Holly & Hawthorn CIC | Education | 2021 |
| Holt HR Consulting Ltd | Administrative & support | 2026 |
| Holy COW Events Ltd | Arts & recreation | 2021 |
| Homeless Accommodation Ltd | Hospitality | 2022 |
| Hooton Pagnell Renewables Limited | Energy | 2025 |
| Horsehill Farm Limited | Real estate | 2018 |
| Hummingbird Motion Pictures Ltd | Information & communication | 2020 |
| Hussey Electrical Limited | Construction | 2003 |
| Ica&F Ltd | Professional & scientific | 2013 |
| Icaps Enterprises Limited | Health & social care | 2014 |
| Icaps Property Management Limited | Real estate | 2023 |
| ICF South West Ltd | Construction | 2021 |
| Icu-Bib Limited | Other services | 2021 |
| Ideas and Action for Public Good Ltd | Professional & scientific | 2015 |
| IG Tree Surgery Ltd | Administrative & support | 2025 |
| Ignite Digital Contract Services Limited | Administrative & support | 2017 |
| IGS Property Solutions Ltd | Construction | 2012 |
| IIT Carpentry Ltd | Construction | 2013 |
| Images Shepton Mallet Limited | Other services | 2004 |
| Imperial Estate Ltd | Construction | 2026 |
| Import Accessory House Ltd | Wholesale & retail | 2024 |
| IN Camera Photography Limited | Professional & scientific | 2011 |
| Indigo Blue Properties Ltd | Real estate | 2023 |
| Indigo-Detourne Ltd | Real estate | 2024 |
| Industrial GAS Services South West Limited | Wholesale & retail | 1998 |
| Ingram Consultancy Limited | Professional & scientific | 1999 |
| Inner Sanctum Pilton Ltd | Hospitality | 2023 |
| Innovet Limited | Extraterritorial | 1997 |
| Interim Spaces Trading Limited | Administrative & support | 2017 |
| Intrepid Wines Ltd | Wholesale & retail | 2025 |
| Introretrospect Ltd | Information & communication | 2025 |
| Invest 29 Limited | Real estate | 2025 |
| Iron Ladies Fitness Ltd | Arts & recreation | 2023 |
| Iron Mill House Limited | Real estate | 2023 |
| Isulu Limited | Wholesale & retail | 2006 |
| Italian BAG and Moda Euro Ltd | Wholesale & retail | 2018 |
| Iulia Mihaiu Ltd | Health & social care | 2022 |
| Ivolt Technical Solutions Ltd | Construction | 2021 |
| J & a Automotive (SW) Ltd | Wholesale & retail | 2026 |
| J & W Davis Limited | Agriculture & fishing | 2003 |
| J Alexander London Ltd | Wholesale & retail | 2025 |
| J D V (UK) Limited | Information & communication | 1995 |
| J F Pearce & Sons Limited | Transport & logistics | 2003 |
| J Reid Plastering Limited | Construction | 2003 |
| J. Bailey & Sons Limited | Construction | 1985 |
| J.E.T. Europe Ltd | Wholesale & retail | 2017 |
| J.K.Longman Limited | Agriculture & fishing | 1958 |
| J.K.M.Foods Limited | Administrative & support | 2010 |
| J.S Property SW Ltd | Real estate | 2025 |
| Jack Property Maintenance Ltd | Construction | 2020 |
| Jackdaw Sustainability Consulting Ltd | Information & communication | 2020 |
| Jackson Drilling Holdings Limited | Construction | 2009 |
| Jackson GEO Services Limited | Construction | 2023 |
| Jackson Property Investments | Real estate | 1993 |
| Jackson Property Management Limited | Real estate | 2010 |
| Jacomilly Limited | Financial services | 2024 |
| Jagua Indian Ltd | Hospitality | 2025 |
| Jaime Ritchie & Co Ltd | Hospitality | 2016 |
| James Chocolates Limited | Manufacturing | 2002 |
| James Powell Property Holdings Limited | Real estate | 2026 |