| Hansonii LLP | | 2013 |
| Happy Donuts Ltd | Administrative & support | 2018 |
| Happy Gift Horse Limited | Wholesale & retail | 2019 |
| Harbinger Limited | Financial services | 2023 |
| Hardings Property Group Ltd | Real estate | 2025 |
| Hardwick & ORR Limited | Real estate | 2016 |
| Hardwick Agriculture Limited | Agriculture & fishing | 2024 |
| Harlaxton Estates Limited | Real estate | 2003 |
| Harpur Hill Limited | Construction | 2018 |
| Harriet Close Residents Association Limited | Households | 1976 |
| Harrisons Removals Ltd | Transport & logistics | 2026 |
| Hartwell Machinery Limited | Administrative & support | 2019 |
| Haslehurst Plastering Ltd | Construction | 2007 |
| Hass Holdings Lincs Limited | Financial services | 2012 |
| Hatch Collective Limited | Professional & scientific | 2024 |
| Hatherley Commercial Services Limited | Manufacturing | 2002 |
| Hattie Alvis Ltd | Professional & scientific | 2021 |
| Hatzfeld Care (Gainsborough) Limited | Health & social care | 2020 |
| Hatzfeld Care (Lincoln) Limited | Health & social care | 2019 |
| Hatzfeld Care (Rotherham) Limited | Health & social care | 2020 |
| Hatzfeld Care Limited | Health & social care | 2002 |
| Haus of Napa Elements Ltd | Wholesale & retail | 2024 |
| Haus of Napa Ltd | Other services | 2023 |
| Hawk Project Solutions Ltd | Construction | 2020 |
| Hawk Wellness and Sports Therapy Ltd | Health & social care | 2022 |
| Hawton Stays Ltd | Real estate | 2023 |
| Hawton Waters Ltd | Hospitality | 2021 |
| Hawtonville Chippy (Runs) Ltd | Transport & logistics | 2026 |
| Hawtonville Chippy Ltd | Hospitality | 2026 |
| Hayes Bros Limited | Information & communication | 2002 |
| HB Geotechnical Engineering Ltd | Professional & scientific | 2022 |
| HB Geotechnical Services Ltd | Professional & scientific | 2019 |
| HBS R & D Consulting Ltd | Professional & scientific | 2024 |
| Head Tech Motor Engineers Limited | Wholesale & retail | 2024 |
| Headon Homes (Property) Limited | Real estate | 1994 |
| Headscount Consultancy Limited | Education | 2010 |
| Health & Safely UK Ltd | Other services | 2015 |
| Healy Wilson Advisory Limited | Professional & scientific | 2013 |
| Heartstringsinc Limited | Wholesale & retail | 2023 |
| Heat Haus Newark Limited | Construction | 2016 |
| Heather Jones Investments Limited | Real estate | 2021 |
| Heating Essentials Ltd | Wholesale & retail | 2019 |
| Heating Ideas Ltd | Wholesale & retail | 2020 |
| Heavenly Steps Limited | Health & social care | 2015 |
| Hectors Hardware Ltd | Wholesale & retail | 2021 |
| Hedgerows (Bolsover) Estate Management Company Limited | Households | 2018 |
| Helen Eves Consultancy Limited | Health & social care | 2021 |
| Heliguardian Limited | Information & communication | 2025 |
| Helmsley Court Ltd | Households | 2025 |
| Helping at Home Ltd | Health & social care | 2021 |
| Helping Hands (Notts.) Limited | Construction | 2005 |
| Helping Hands Team Limited | Health & social care | 2016 |
| Helping Hands UK Solutions Ltd | Construction | 2022 |
| HEN Retreats Ltd | Administrative & support | 2026 |
| Henry Mead Ltd | Information & communication | 2021 |
| Heritage Auctioneers & Valuers Limited | Wholesale & retail | 2025 |
| Heritage Estates (Properties) Limited | Hospitality | 2005 |
| Heritage Fabrications Limited | Manufacturing | 2025 |
| Heritage Resorts Limited | Administrative & support | 1999 |
| Hexgreave Estates Limited | Administrative & support | 2001 |
| Hexgreave Limited | Agriculture & fishing | 1996 |
| Hfej Ltd | Real estate | 2023 |
| Hfelectrics Ltd | Construction | 2023 |
| HGT Property Limited | Real estate | 2024 |
| HHH Homes Ltd | Real estate | 2025 |
| Hibee Automotive Ltd | Wholesale & retail | 2026 |
| Hici Ltd | Manufacturing | 2015 |
| Hideaway Glam Ltd | Wholesale & retail | 2024 |
| Higginbottom and Family Ltd | Transport & logistics | 2023 |
| High Homes Limited | Real estate | 2026 |
| High Performance Business Solutions Ltd | Professional & scientific | 2026 |
| Highgate Homes (Lincoln) Ltd | Construction | 2016 |
| Highgate Homes (Midlands) Limited | Real estate | 2000 |
| Highland Builders Ltd | Manufacturing | 2025 |
| Highline Automotive Limited | Wholesale & retail | 2021 |
| Highview Loft Conversions Ltd | Construction | 2006 |
| Hill Farm Estate Holdings Ltd | Hospitality | 2021 |
| Hill Street Motors Limited | Wholesale & retail | 1986 |
| Hill Top Equestrian Centre Limited | Real estate | 2010 |
| Hillend Properties Limited | Real estate | 2020 |
| Hills of Newark Ltd. | Wholesale & retail | 1979 |
| Hillside MS Ltd | Agriculture & fishing | 2012 |
| Hillside-Infinitas Limited | Professional & scientific | 2022 |
| Hire a Wife Cleaning Services Ltd | Administrative & support | 2021 |
| Hire-Me Moto Ltd | Administrative & support | 2018 |
| Hitched Towbars Limited | Wholesale & retail | 2024 |
| HJB IT & Networks Ltd | Information & communication | 2025 |
| HJD Electrical Supplies Ltd | Construction | 2019 |
| HJF Solutions Ltd | Professional & scientific | 2025 |
| HJT Plumb Ltd | Construction | 2024 |
| HLD Medico-Management Limited | Health & social care | 2025 |
| HMF Jewellery Ltd | Manufacturing | 2021 |
| HN Commercial Ltd | Wholesale & retail | 2026 |
| Hobby-Horse Childcare Limited | Professional & scientific | 2000 |
| Hoddings Meadow (Hodthorpe) Management Company Limited | Real estate | 2021 |
| Hogg for Hire Ltd | Professional & scientific | 2024 |
| Holchar Limited | Real estate | 2022 |
| Holden Johnson Limited | Professional & scientific | 2024 |
| Holland Driving Services Limited | Transport & logistics | 2011 |
| Hollowgates Farming Ltd | Agriculture & fishing | 2025 |