| Hodg Invest Ltd | Financial services | 2023 |
| Home Group Financial Ltd | Professional & scientific | 2022 |
| Honey Gardens Ltd | Administrative & support | 2002 |
| Hope Chapel Apartments Management Ltd | Households | 2022 |
| Hoptons Consulting LLP | | 2015 |
| Horusky Ltd | Information & communication | 2025 |
| Housing Law Week Limited | Extraterritorial | 2021 |
| Howard Croker Partnership Limited | Construction | 2004 |
| HPB Services (Devizes) Ltd | Real estate | 2022 |
| Hughes Urban Design Ltd | Professional & scientific | 2025 |
| Hungerford Digital Ltd | Information & communication | 2014 |
| Hunter French (Corsham) Limited | Real estate | 2007 |
| Hunter French Commercial Ltd | Real estate | 2019 |
| Hurst Energy Storage Limited | Professional & scientific | 2023 |
| Hydeaway Property Limited | Real estate | 2022 |
| IAN Callaghan Limited | Health & social care | 2010 |
| Icon Holdings Services UK Limited | Health & social care | 2024 |
| IFS Investments Ltd | Real estate | 2016 |
| IFS4B Ltd | Professional & scientific | 2010 |
| Ignitioncraft Limited | Professional & scientific | 2025 |
| Ilsom Court Cottages Limited | Households | 2022 |
| Ilsom House Limited | Hospitality | 2021 |
| Imsl Trustee Ltd | Professional & scientific | 2026 |
| IN a Box Services Ltd | Professional & scientific | 2021 |
| Inca Perudo Ltd | Extraterritorial | 2021 |
| Incendiary Pigs Limited | Arts & recreation | 2010 |
| Incredibits Ltd | Information & communication | 2015 |
| Ingoldmells Court Management Company Limited | Real estate | 2013 |
| INK and IVY Group Limited | Information & communication | 2024 |
| Inside Edge Performance Ltd | Arts & recreation | 2024 |
| Insolvency Law Week Limited | Extraterritorial | 2021 |
| Inspired ACT Limited | Administrative & support | 2010 |
| Integrated Clinical Oncology Network UK Ltd | Health & social care | 2023 |
| Integrated Financial Solutions Limited | Financial services | 2008 |
| Integritybox Ltd | Information & communication | 2026 |
| Intelligence Management Support Services Limited | Professional & scientific | 2010 |
| Interactive Scientific Limited | Education | 2013 |
| Interiors by Chloe Ltd | Professional & scientific | 2024 |
| Ipcress Developments Ltd | Professional & scientific | 2024 |
| IPS Homeclean Ltd | Households | 2013 |
| IPS Property (UK) Limited | Real estate | 2012 |
| Island Reach (Poole) Limited | Households | 1997 |
| Izest Limited | Information & communication | 1984 |
| J D Pillinger Limited | Construction | 2022 |
| J M O'Toole Ltd | Construction | 2005 |
| J Martin (Roofing Contractor) & Sons Limited | Construction | 2017 |
| J.S.D. Automotive Tyre Maintenance Ltd | Wholesale & retail | 2025 |
| Jaiambe Property Limited | Real estate | 2021 |
| James Mccallum Productions Ltd | Information & communication | 2012 |
| Jamie's Farm | Agriculture & fishing | 2009 |
| Jenwood Limited | Wholesale & retail | 1973 |
| Jeremy Jenkins Estate Agent Limited | Real estate | 2009 |
| JH148 Ltd | Real estate | 2017 |
| JJG HR Solutions Limited | Administrative & support | 2016 |
| Johal Capital Ltd | Financial services | 2025 |
| John Allen Homes Limited | Real estate | 1971 |
| John Hartley Surveyors Ltd | Construction | 2021 |
| John Jacobs (Golf) Limited | Wholesale & retail | 2012 |
| Jooka Limited | Information & communication | 2015 |
| Josh Davis Motorsport Ltd | Arts & recreation | 2023 |
| JPC Developments Ltd | Construction | 2016 |
| JRB Catering Limited | Hospitality | 2026 |
| K IS for Kangaroo Limited | Real estate | 2024 |
| K O Carpentry and Joinery Limited | Manufacturing | 2013 |
| Kailwoods Limited | Construction | 2013 |
| Kank Tech Solutions Ltd | Information & communication | 2020 |
| Karem Construction Limited | Construction | 2018 |
| Keeley Scott Ltd | Professional & scientific | 2019 |
| Keep Calm and Curry on Ltd | Hospitality | 2020 |
| Keepsake Family History Ltd | Information & communication | 2026 |
| Kemp Hydrographic Ltd. | Professional & scientific | 2013 |
| Kewchoice Limited | Real estate | 1982 |
| Kickstand Theatre CIC | Arts & recreation | 2026 |
| KIK Radio | Information & communication | 2013 |
| Kindle Energy Group Limited | Financial services | 2019 |
| Kingsdown Golf Club Limited | Arts & recreation | 2011 |
| Kingsdown Legal Limited | Professional & scientific | 2014 |
| Knights Surveys Ltd | Professional & scientific | 2023 |
| Knowprocess Limited | Information & communication | 2018 |
| KR HR & Training Consultancy Ltd | Administrative & support | 2020 |
| Krafted Living Ltd | Construction | 2024 |
| Kratos Capital Limited | Real estate | 2020 |
| Ktsl Group Limited | Information & communication | 2017 |
| Ktsl Limited | Information & communication | 2000 |
| L & R Bath LLP | | 2016 |
| L&R Urban Limited | Extraterritorial | 2015 |
| L.A.B.B. Hair Limited | Other services | 2019 |
| L1 (Bath) Limited | Households | 1981 |
| Ladbrook Meadow Developments Limited | Construction | 2011 |
| Landmarc Products Limited | Professional & scientific | 2002 |
| Landmarc Properties Ltd | Real estate | 2021 |
| Langley Builders (Bath) Ltd | Construction | 2015 |
| Larkhall Farm Shop Ltd | Wholesale & retail | 2020 |
| Laura Place Nominees Limited | Professional & scientific | 2010 |
| Law Week Limited | Information & communication | 2005 |
| LC2 Limited | Education | 2002 |
| LE Assetco 1 Limited | Administrative & support | 2023 |
| LE Assetco 2 Limited | Administrative & support | 2023 |
| LE Bess 1 Limited | Administrative & support | 2023 |
| LE Solar 1 Limited | Administrative & support | 2023 |