| HAY Days Ltd | Hospitality | 2024 |
| HDF Scaffolding Ltd | Construction | 2025 |
| Hellenic Harvest Limited | Other services | 2025 |
| HER Eulogy Limited | Manufacturing | 2024 |
| Heritage Explorer Tours Ltd | Extraterritorial | 2020 |
| Heritage Landscapes Gloucestershire Ltd | Administrative & support | 2025 |
| Hiley Hair Club Ltd | Other services | 2022 |
| HJP Fitness Limited | Health & social care | 2015 |
| HKA Martial Arts Ltd | Arts & recreation | 2025 |
| Hodgson Civil Engineering Ltd | Construction | 2022 |
| Holly-Mae's Beauty Therapy Ltd | Other services | 2020 |
| Hopewell Colliery Cafe Ltd | Hospitality | 2019 |
| HOT45 Music Limited | Extraterritorial | 2000 |
| House of Flavours (Holdings) Limited | Administrative & support | 2018 |
| House of Flavours Limited | Administrative & support | 1989 |
| House of Halo and Company Limited | Other services | 2024 |
| Howats Chimney Sweeps Ltd | Administrative & support | 2019 |
| HR Construction (Employment) Ltd | Administrative & support | 2025 |
| HR Employment Ltd | Administrative & support | 2021 |
| HSP Art and Publications Ltd | Wholesale & retail | 2025 |
| Hunt 4 Jobs Ltd | Extraterritorial | 2024 |
| HUNT4EMPLOYMENT Ltd | Professional & scientific | 2024 |
| HUNT4ENTERPRISES Ltd | Administrative & support | 2022 |
| IAN Page Roofing Limited | Construction | 2003 |
| IAR Cleaning Services Ltd | Administrative & support | 2024 |
| Impact Matters Group Ltd | Professional & scientific | 2025 |
| Indigo Property Maintenance Ltd | Households | 2023 |
| Indra Ltd | Wholesale & retail | 2013 |
| Infinity Sky Ltd | Real estate | 2025 |
| Ingenious Consulting Ltd | Information & communication | 1997 |
| Ingenious Ltd | Information & communication | 2000 |
| Ingredients Alliance Ltd | Extraterritorial | 2018 |
| Inter-Euro Investment Holdings Limited | Construction | 2023 |
| International Brand Strategy Ltd | Professional & scientific | 2026 |
| Ironmasters Gym Built Strong Ltd | Arts & recreation | 2018 |
| J W Blinds Ltd | Other services | 2017 |
| J&J Cooke Limited | Financial services | 2022 |
| JAC Auto Services Ltd | Wholesale & retail | 2022 |
| Jalee Holdings Ltd | Real estate | 2019 |
| James and Steel Limited | Wholesale & retail | 1997 |
| Jaxby Equine Ltd | Arts & recreation | 2026 |
| JBC Property Ltd | Real estate | 2019 |
| JD Phenelec Ltd | Manufacturing | 2026 |
| Jemoba Pressure Washing Services Limited | Other services | 2012 |
| Jesse Dillon Bildner Ltd | Education | 2014 |
| Jewels Wingfield Limited | Hospitality | 2011 |
| Jinxing (Chinese) Limited | Hospitality | 2023 |
| Jkdesign Lighting Controls Limited | Professional & scientific | 2009 |
| Jodie Tucker Recruitment Ltd | Administrative & support | 2022 |
| Jones Associates Architects Limited | Professional & scientific | 2017 |
| JR Hale Enterprise Ltd | Financial services | 2023 |
| K W Bell Group Limited | Construction | 1984 |
| K.Ward Development Ltd | Construction | 2025 |
| Kadiwala Limited | Hospitality | 2026 |
| Kanbey Limited | Hospitality | 2021 |
| Karkins Limited | Hospitality | 2023 |
| Katta Mitta Ltd | Hospitality | 2026 |
| Keightley Construction Ltd | Construction | 2019 |
| Keightley Property Ltd | Real estate | 2024 |
| Kelmerhomes Ltd | Construction | 2023 |
| Kilmaha Limited | Agriculture & fishing | 2018 |
| Kind Clinical Care Ltd | Health & social care | 2026 |
| Kitchen Inspirations Limited | Manufacturing | 2004 |
| Knolts Ltd | Professional & scientific | 2025 |
| KSL (FOD) Limited | Transport & logistics | 2018 |
| Kwan JAI Jewellery Ltd | Manufacturing | 2024 |
| L J M Technical Services Ltd | Transport & logistics | 2015 |
| Laila Property Limited | Real estate | 2021 |
| Lara Energy Ltd | Wholesale & retail | 2026 |
| Lbjb Holdings Ltd | Real estate | 2024 |
| LCS Groundwork Ltd | Construction | 2018 |
| LCS Groundworks & Civils Ltd | Construction | 2025 |
| LCS Group (INT) Ltd | Financial services | 2023 |
| LDS Heating Services & Solutions Ltd | Construction | 2025 |
| LE Petit Cafe Ltd | Extraterritorial | 2016 |
| LET IT ALL OUT Ltd | Real estate | 2024 |
| Lewis EHS Ltd | Professional & scientific | 2024 |
| Life Science Limited | Manufacturing | 1996 |
| Lima Shamba Ltd | Administrative & support | 2022 |
| Lions Empire Ltd | Wholesale & retail | 2020 |
| Little Feast Food Ltd | Hospitality | 2017 |
| Littledean House BNB Ltd | Hospitality | 2018 |
| Littledean Jail Ltd | Arts & recreation | 2011 |
| Livesthroughfriends CIC | Health & social care | 2008 |
| LM Utilities Ltd | Construction | 2022 |
| LMH Vehicle Services Ltd | Wholesale & retail | 2015 |
| LMN Talent Management Ltd | Professional & scientific | 2021 |
| Loading Bay Lifts Limited | Administrative & support | 2010 |
| Logos Limited | | 1980 |
| Loupe-Hq Limited | Administrative & support | 2020 |
| Love Vegan Health Ltd | Wholesale & retail | 2022 |
| Loveridge's Garage Limited | Wholesale & retail | 2015 |
| Loving Care Domiciliary Services Limited | Health & social care | 2009 |
| LSP Gaming Ltd | Arts & recreation | 2020 |
| LSP Investment Holdings Ltd | Real estate | 2021 |
| Lumi Design Ltd | Professional & scientific | 2023 |
| Lumi Group Ltd | Financial services | 2023 |
| Lydney Skiff C.I.C. | Manufacturing | 2020 |
| Lynwood Property Developments Limited | Real estate | 2019 |
| M & a International (Europe) Limited | Extraterritorial | 1989 |