| FW Kerridge Investments Limited | Real estate | 2019 |
| G C Equestrian Ltd | Agriculture & fishing | 2026 |
| G.T. Tuning Limited | Wholesale & retail | 1999 |
| Galabid Limited | Information & communication | 2014 |
| Garden of Meaden Ltd | Administrative & support | 2023 |
| Garden Suite Aesthetics Ltd | Other services | 2025 |
| Gavin Riley Ltd | Administrative & support | 2015 |
| GE Holdco Limited | Real estate | 2025 |
| Gebb Services Ltd | Agriculture & fishing | 2023 |
| Genesis Whitby Road Management Company Limited | Administrative & support | 2003 |
| Genius Idea Limited | Administrative & support | 2021 |
| Gent Builders Limited | Construction | 2008 |
| Geoff White Building Services Limited | Construction | 2010 |
| Geomagna Ltd | Professional & scientific | 2009 |
| Gettrades Ltd | Information & communication | 2024 |
| Ginger Grey Ltd | Arts & recreation | 2024 |
| Global OIL Industry Supplies Limited | Wholesale & retail | 2008 |
| Globalsource Supplies Limited | Wholesale & retail | 2018 |
| GO2RENT Limited | Real estate | 2021 |
| Goat Clothing Company Ltd | Wholesale & retail | 2021 |
| Gold - the Driving Academy Limited | Administrative & support | 2001 |
| Gold Hill Farm Limited | Agriculture & fishing | 1999 |
| Goldstrike Legacy Limited | Hospitality | 2021 |
| Goodale Financial Partners Limited | Financial services | 2018 |
| Gould Heating Limited | Construction | 2006 |
| Gran's Garage Ltd | Wholesale & retail | 2025 |
| Grays Wholesale UK Ltd | Wholesale & retail | 2023 |
| Green Energy Consultants Limited | Other services | 2007 |
| Green Woodland Limited | Agriculture & fishing | 2021 |
| Greyhound Inn Freehouse Ltd | Hospitality | 2019 |
| Grosvenor & Christian Ltd | Manufacturing | 2018 |
| Ground Control Landscaping Ltd | Administrative & support | 2023 |
| GRT M&E Services Limited | Construction | 2014 |
| Gryphon Air Limited | Transport & logistics | 2005 |
| Guilded Ltd | Professional & scientific | 2010 |
| Guttridge (Dorset) Ltd | Construction | 2019 |
| H.& L.Kerley & Sons Limited | Agriculture & fishing | 1955 |
| Hall & Woodhouse Developments Limited | Hospitality | 2018 |
| Hambledon Properties Limited | Real estate | 2012 |
| Hambledon Trading Ltd | Wholesale & retail | 2026 |
| Hambledons Services Limited | Real estate | 2023 |
| Hanford School Charitable Trust Limited | Education | 1991 |
| Hanson Construction Limited | Construction | 2000 |
| Harbarn Developments Limited | Construction | 2017 |
| Harding Farms Partnership LP | | 2018 |
| Harney & Co Financial Advisers Limited | Financial services | 2021 |
| Harney & Co Limited | Real estate | 2003 |
| Harney Limited | Construction | 2006 |
| Harrisphere Limited | Professional & scientific | 2025 |
| Hart Technology Solutions Ltd | Information & communication | 2025 |
| Haskell Developments Ltd | Financial services | 2026 |
| Hawkers Consultancy Ltd | Professional & scientific | 2023 |
| Hawks & Mallory Ltd | Arts & recreation | 2026 |
| Hawthorn Handmade Limited | Wholesale & retail | 2017 |
| Hayward (Fencing Contractors) Ltd. | Construction | 2001 |
| HB Private Water Ltd | Households | 2025 |
| Headford Ridge Limited | Professional & scientific | 1998 |
| Heads UP Barber Dorset Ltd | Other services | 2021 |
| Healthy Pets (Blandford) Limited | Wholesale & retail | 2002 |
| Hearty Snacks Ltd | Manufacturing | 2008 |
| Heirlooms Jewellery Ltd | Wholesale & retail | 2018 |
| Hellfireuk Ltd | Wholesale & retail | 2025 |
| Henbury Moon Ltd | Wholesale & retail | 2021 |
| Henderson Pre-Cast Ltd | Manufacturing | 2006 |
| Henson Farming Limited | Agriculture & fishing | 2007 |
| Heritage Vision Limited | Professional & scientific | 2004 |
| HH Partners Ltd | Real estate | 2019 |
| HHK Architectural Design Consultancy Ltd | Hospitality | 2021 |
| High Value Horticulture (3TL) Limited | Professional & scientific | 2003 |
| Highest Touch Ltd. | Professional & scientific | 2015 |
| Hill Farm Iwerne Minster (2002) Ltd. | Real estate | 1996 |
| Hillman Enterprises Limited | Other services | 2016 |
| Historic Concepts Limited | Education | 2017 |
| Hollands Farms B Limited | Financial services | 2007 |
| Hollands Farms Blandford Limited | Agriculture & fishing | 2007 |
| Holtwood Community Farm LLP | | 2010 |
| Home & Move Ltd | Wholesale & retail | 2026 |
| Home Farm (Charlton Barrow) Limited | Administrative & support | 2004 |
| Home Farm (Marston) Limited | Construction | 1979 |
| Home of Pets Limited | Agriculture & fishing | 2017 |
| HOR Group Ltd | Wholesale & retail | 2026 |
| Horizons Europe Limited | Arts & recreation | 2000 |
| Hornbeam Way Freehold Limited | Households | 2017 |
| House of Bare Aesthetics Limited | Other services | 2025 |
| Housenumbers Limited | Wholesale & retail | 2013 |
| Howling Wolf Ltd | Information & communication | 2011 |
| HRN Therapy Limited | Health & social care | 2024 |
| Human Futurology Applications Limited | Professional & scientific | 2020 |
| Human Futurology Ltd | Professional & scientific | 2020 |
| Hurst Interior Contracts Limited | Construction | 1982 |
| Hurzain Marketing Ltd | Wholesale & retail | 2025 |
| Hustings Electrical Limited | Construction | 2001 |
| Hutton's Incorporated Ltd | Real estate | 2023 |
| Iain Weatherby Limited | Information & communication | 2003 |
| IAN Kevin Hudson Limited | Construction | 2024 |
| IN Home Property Services Ltd | Administrative & support | 2012 |
| In-Cut Heating Limited | Construction | 2022 |
| Indorset Developments Ltd | Construction | 2015 |
| Inhouse Improvements Ltd | Construction | 2020 |
| Insight Activities Ltd | Education | 2020 |