| Health Transportation Group UK Limited | Health & social care | 1998 |
| Healthcare Acumen Ltd | Professional & scientific | 2016 |
| Healthguard Limited | Professional & scientific | 2001 |
| Healthystay Ltd | Health & social care | 2025 |
| Heapham Road Management Company Limited | Households | 1989 |
| Hearing Centre Lincoln Ltd | Wholesale & retail | 2022 |
| Hearing Help Ltd | Extraterritorial | 2015 |
| Hearing House Ltd | Health & social care | 2011 |
| Heart Home Happiness Ltd | Wholesale & retail | 2024 |
| Heart of Supply Education Recruitment Limited | Administrative & support | 2025 |
| Heated Driveway Systems Ltd | Construction | 2017 |
| Heath Court (MR) Limited | Real estate | 2020 |
| Heath Farm Day Nursery (Holdings) Limited | Financial services | 2022 |
| Heath Farm Day Nursery Limited | Education | 2007 |
| Heath Farm Group Limited | Financial services | 2024 |
| Heath Paving Ltd | Construction | 2024 |
| Heaths Construction & Building Limited | Construction | 2024 |
| Heathtop Construction Ltd | Construction | 2019 |
| Heating Centre.Net Limited | Administrative & support | 1998 |
| Heaton King Consultancy Ltd | Professional & scientific | 2022 |
| Heaver Group Holdings Ltd | Financial services | 2020 |
| Heavy Duty Diesels (Europe) Ltd | Manufacturing | 2016 |
| Heckington Hall Limited | Real estate | 2015 |
| Hector Cardiology Ltd | Health & social care | 2024 |
| Hectral Consulting Ltd | Professional & scientific | 2019 |
| Heggs Performance Engineering Ltd | Manufacturing | 2021 |
| Heidelberg Ltd | Professional & scientific | 2012 |
| Heig Industry Supplies Limited | Administrative & support | 2026 |
| Heighnton PUB Company Limited | Hospitality | 2020 |
| Heightcorp Ltd | Mining & quarrying | 2025 |
| Heights Roofing & Building Limited | Construction | 2019 |
| Heike'Shaus Limited | Hospitality | 2012 |
| Hekasleep.Co.Uk Limited | Wholesale & retail | 2026 |
| Helen Derry Ltd | Administrative & support | 2011 |
| Helen Knowles Travel Ltd | Administrative & support | 2013 |
| Helen Lindores Design Limited | Professional & scientific | 2003 |
| Helialink Ltd | Professional & scientific | 2025 |
| Helios Travel Ltd | Administrative & support | 2024 |
| Helios Vision Limited | Real estate | 2018 |
| Helix Diagnostics Limited | Health & social care | 2025 |
| Helloquartz Ltd | Information & communication | 2025 |
| Helptoday Limited | Wholesale & retail | 2019 |
| Hemark Ltd | Wholesale & retail | 2011 |
| Hemming Decorators Limited | Construction | 2003 |
| Hemsley Medical Ltd | Health & social care | 2017 |
| Hendel and Hendel Limited | Wholesale & retail | 2022 |
| Hendin Developments Ltd | Construction | 2025 |
| Henley Manufacturing Limited | Manufacturing | 2020 |
| Henley Place (Lincoln) Limited | Real estate | 2022 |
| Hennessy Investment Property Services Ltd | Real estate | 2019 |
| Henrick Supplies Ltd | Wholesale & retail | 2026 |
| Henrietta Reeve Holdings Limited | Real estate | 2018 |
| Henry Campbell Limited | Financial services | 2020 |
| Henry FOX Properties Limited | Extraterritorial | 1997 |
| Henson (Coleby) Limited | Agriculture & fishing | 1998 |
| Henson Franklyn Limited | Administrative & support | 2011 |
| Henson Torksey Limited | Agriculture & fishing | 1956 |
| Herbietech Auto Ltd | Wholesale & retail | 2024 |
| Herbs of Grace (UK) Ltd | Wholesale & retail | 2009 |
| Heritage (Lincoln) Limited | Wholesale & retail | 2013 |
| Heritage Education Trust | Education | 1986 |
| Heritage Exterior Cleaning Ltd | Administrative & support | 2021 |
| Heritage Grove (Woodhall) Management Limited | Households | 2025 |
| Heritage Property Developments Ltd. | Construction | 2000 |
| Heritage Scenic Studio Limited | Arts & recreation | 2025 |
| Hero Enterprises Ltd | Real estate | 2023 |
| Heronswood Design Limited | Professional & scientific | 2004 |
| Herrick Fire Limited | Public administration | 2023 |
| Herroc Ltd | Wholesale & retail | 2026 |
| Herts Local Crew Limited | Arts & recreation | 2025 |
| Hestia Property Group Ltd | Real estate | 2025 |
| Hewson Business Services Limited | Professional & scientific | 2005 |
| Hewsys Ltd. | Information & communication | 1985 |
| Hexagon Property Improvements Ltd | Real estate | 2025 |
| HFJ Operations Limited | Manufacturing | 2024 |
| HFM Care Ltd | Administrative & support | 2018 |
| HFT Lincoln Ltd | Construction | 2020 |
| HGV Links Ltd | Administrative & support | 2023 |
| HH Management Limited | Households | 2004 |
| HHF Developments Limited | Construction | 2024 |
| HHZ (UK) Limited | Wholesale & retail | 2015 |
| HIA Power Electrical Services Limited | Construction | 2026 |
| Hiatt Decorating Ltd | Construction | 2021 |
| Hiatt Earthing Limited | Extraterritorial | 2024 |
| Hichss Homes Ltd | Construction | 2019 |
| Hickson (Forecourt) Ltd | Wholesale & retail | 2011 |
| Hickson Quality Foods Limited | Wholesale & retail | 2003 |
| High Dyke Agro Services Limited | Agriculture & fishing | 2011 |
| High Properties (Lincoln) Ltd | Real estate | 2026 |
| High Voltage Installations Ltd | Professional & scientific | 2011 |
| Highfield Close Limited | Real estate | 2022 |
| Highfield Consulting (Lincoln) Ltd | Construction | 2020 |
| Highline Motor Sales Ltd | Wholesale & retail | 2023 |
| Highq Construction Ltd | Construction | 2015 |
| Highwire Investments Limited | Real estate | 2024 |
| Hiicom Network Services Limited | Information & communication | 2022 |
| Hiit House Fitness Ltd | Education | 2023 |
| Hikkybeauty Limited | Wholesale & retail | 2023 |
| Hilbre Property Management Limited | Real estate | 2026 |
| Hill & Co Lettings Ltd | Real estate | 2026 |