| First Years First AID Limited | Public administration | 2026 |
| Five Firs Management Company Ltd | Households | 2002 |
| Fletchamoore (Poole) Ltd | Construction | 2020 |
| Flexible PM Ltd | Professional & scientific | 2017 |
| Fluid Works Limited | Water & waste | 2012 |
| FLW Property Ltd | Real estate | 2025 |
| FMJ Consulting Ltd | Administrative & support | 2024 |
| Foam Forge Limited | Manufacturing | 2003 |
| Focus Training (UK) Ltd | Education | 2006 |
| Foley Physiotherapy Ltd | Health & social care | 2025 |
| Foot Mechanics Podiatry Ltd | Other services | 2014 |
| Forentics Ltd | Information & communication | 2016 |
| FOT Management Ltd | Financial services | 2020 |
| Four Masters Systems Limited | Information & communication | 1982 |
| FOX Red Associates Limited | Construction | 2023 |
| Franco's Restaurant Ltd | Hospitality | 2003 |
| Frank Greenslade Limited | Wholesale & retail | 1960 |
| Fraser Portraits Limited | Professional & scientific | 1990 |
| Freedom Wills & Protection Limited | Professional & scientific | 2020 |
| Freedom Within (Dorset) Limited | Health & social care | 2018 |
| Fresh Twist Training Limited | Education | 2020 |
| Frez Systems Limited | Information & communication | 1996 |
| Friends of Dolphin(The) | Health & social care | 1982 |
| Frontline Cars Limited | Wholesale & retail | 2025 |
| Fuelsense Limited | Professional & scientific | 2013 |
| Future Faces | Health & social care | 2013 |
| Fyrdraca Limited | Construction | 2022 |
| G Parnell Roofing Limited | Construction | 2002 |
| Ganne Ltd | Hospitality | 2024 |
| Gardan Landscapes Limited | Administrative & support | 2026 |
| Gardens Court(Poole)Maintenance Company Limited | Households | 1960 |
| GB Risk Solutions Ltd | Administrative & support | 2026 |
| Gebbie Ltd | Information & communication | 2020 |
| Gentilwood Limited | Health & social care | 2019 |
| Gerring Enterprises Ltd | Real estate | 2019 |
| Gjmd Consulting Ltd | Information & communication | 2014 |
| Global Heating Ltd | Construction | 2023 |
| Global Protective Solutions Ltd | Administrative & support | 2010 |
| Godsell Arnold Partnership Limited | Construction | 1999 |
| Graft Structures Ltd | Professional & scientific | 2024 |
| Graham Garner and Partners Limited | Professional & scientific | 1987 |
| Grass Routes (LDN) Limited | Administrative & support | 2024 |
| GRB 2010 Holdings Limited | Professional & scientific | 2010 |
| Green Pastures Gardening Services Ltd | Other services | 2026 |
| Greenjoy Property Management Limited | Hospitality | 1984 |
| Greenwood Cottages Management Company Limited | Real estate | 1990 |
| Greys Construction Ltd | Construction | 2025 |
| Griffs Family Butchers Ltd | Hospitality | 2016 |
| Grockle Property Solutions LLP | | 2022 |
| Ground UP Video Productions Limited | Information & communication | 2020 |
| Gutter Cleaning Specialists Ltd | Extraterritorial | 2016 |
| GW Knowledge Ltd | Professional & scientific | 2016 |
| Gym Plug Limited | Wholesale & retail | 2022 |
| Gymnasia.Io Ltd | Other services | 2026 |
| H J L Kitchens & Bathrooms Ltd | Construction | 2014 |
| H Phenix Ltd | Professional & scientific | 2018 |
| H2O Associates Ltd. | Health & social care | 2006 |
| Hair Tech Dorset Ltd | Other services | 2008 |
| Hammerton (Lancashire) Ltd | Real estate | 2016 |
| Hamworthy Osteopathic Clinic Ltd. | Health & social care | 2003 |
| Handles Group Ltd | Information & communication | 2025 |
| Harding Electrical Services (Dorset) Limited | Construction | 2013 |
| Harefield Property Development Ltd | Construction | 2023 |
| Harefield Property Improvements Ltd | Construction | 2017 |
| Harmony Design Ltd | Professional & scientific | 2020 |
| Harris & Nash (Redlynch) Limited | Financial services | 2020 |
| Hartlie Building Control Limited | Professional & scientific | 2025 |
| Harvic Enterprises Limited | Other services | 1963 |
| Havenpool Limited | Households | 2013 |
| Headless Ghost Limited | Professional & scientific | 2016 |
| Healthy Habits Cafe Ltd | Hospitality | 2018 |
| Heide Ltd | Information & communication | 2022 |
| Helen Gandy Ltd. | Professional & scientific | 2015 |
| Heritage 3D Printworks Ltd | Manufacturing | 2025 |
| Hiawatha IT Ltd | Information & communication | 2017 |
| High Impact Ltd | Information & communication | 2008 |
| Hill Top Farm (Dorset) Limited | Real estate | 2023 |
| Hillier Wilson Ltd. | Real estate | 2003 |
| Hmpc Ltd | Professional & scientific | 2016 |
| Holly Wood (Broadstone) Management Limited | Real estate | 2020 |
| Hollygrace Properties Limited | Real estate | 2016 |
| Holmwood (Westbourne) Management Company Limited | Households | 1989 |
| Home Choose Flooring Ltd | Wholesale & retail | 2026 |
| Hopkinson Financial Services Limited | Professional & scientific | 2024 |
| Hortimate Ltd | Agriculture & fishing | 2005 |
| Howson Group Ltd | Financial services | 2026 |
| Hub Ventures Ltd | Construction | 2023 |
| Humes Holdings Limited | Real estate | 2023 |
| Hvac Systems Limited | Wholesale & retail | 2021 |
| Hydracare Limited | Professional & scientific | 1995 |
| Hyperbuild Ltd | Construction | 2020 |
| I C Brindle & Co Limited | Wholesale & retail | 2011 |
| IBG Corp Limited | Financial services | 2023 |
| Ifixtech Broadstone Ltd | Manufacturing | 2018 |
| IGX Solutions Ltd | Wholesale & retail | 2009 |
| Imowat Ltd | Health & social care | 2016 |
| Impossible Things Limited | Administrative & support | 2012 |
| Indigo Campers Limited | Administrative & support | 2018 |
| Indigo Mews Freehold Limited | Households | 2013 |
| Infinity Loop Limited | Information & communication | 2015 |