| Hill Close Farm Management Company Limited | Households | 2018 |
| Hill Holt Gainsborough Limited | Agriculture & fishing | 2012 |
| Hill Top Construction UK Limited | Construction | 2019 |
| Hillcroft Developments Limited | Real estate | 2000 |
| Hilliard Design Limited | Professional & scientific | 2008 |
| Hillmeads Investments Limited | Real estate | 2005 |
| Hills Medical Ltd | Health & social care | 2019 |
| Hilton House Services Limited | Households | 2005 |
| Hiltons Paddock (Management) Ltd | Households | 2024 |
| Himalayan Curry Limited | Hospitality | 2026 |
| Himawari Mediphil Ltd | Administrative & support | 2018 |
| Hindles of Lincoln Limited | Manufacturing | 1988 |
| Hindley Urological Surgery Ltd | Health & social care | 2010 |
| Hiqmat Ltd | Education | 2025 |
| Historic Lincoln Trust Limited | Arts & recreation | 2011 |
| Hive of Hands Ltd | Information & communication | 2024 |
| HJ Media & Security Limited | Construction | 2022 |
| HJL Services Limited | Manufacturing | 2025 |
| HM Electrical Solutions Limited | Wholesale & retail | 2016 |
| HM Organic Chickens Limited | Agriculture & fishing | 2015 |
| HMD Mortgages Limited | Financial services | 2021 |
| HMH Psychiatry Ltd | Health & social care | 2025 |
| HML & Co Consulting Limited | Professional & scientific | 2020 |
| HMT Racing Limited | Professional & scientific | 2009 |
| HNR Lincoln Limited | Real estate | 2023 |
| Hobbledehoo Ltd | Wholesale & retail | 2022 |
| Hobbsmart Ltd | Health & social care | 2025 |
| Hobh Consultancy Ltd | Administrative & support | 2024 |
| Hobson Holdings Limited | Financial services | 2017 |
| Hockley and Sons Brewery Ltd | Manufacturing | 2019 |
| Hodges Bowling Limited | Arts & recreation | 2026 |
| Hodson's Properties Ltd | Real estate | 2025 |
| Holbeach Motorcycle Tyres Ltd | Wholesale & retail | 2002 |
| Holbeach Tyres Limited | Wholesale & retail | 2012 |
| HOLDCOTEMP022025 Limited | Financial services | 2025 |
| Holder Specialised Solutions Ltd | Professional & scientific | 2021 |
| Holdingham Farms LLP | | 2006 |
| Holdsworth Homes Limited | Real estate | 2012 |
| Holiday Digital Ltd | Information & communication | 2020 |
| Holistic Health & Safety Solutions UK Limited | Professional & scientific | 2025 |
| Holistic Healthcare Lincoln Ltd | Health & social care | 2022 |
| Hollamby Homes Lincoln Ltd | Real estate | 2024 |
| Hollingworth Toyn & Co. (Holdings) Limited | Real estate | 2016 |
| Hollingworth Toyn & Co. Limited | Real estate | 1954 |
| Holly Cottage Country Retreat Limited | Real estate | 2022 |
| Holly Properties (Lincoln) Limited | Real estate | 2007 |
| Holly's Meals Limited | Manufacturing | 2020 |
| Hollywell Road Properties Ltd | Real estate | 2020 |
| Holme Enterprises Limited | Real estate | 2026 |
| Holmes Advanced Developments Limited | Real estate | 2025 |
| Holmes Construction Consultancy Services Ltd | Professional & scientific | 2023 |
| Holmes Lyndon Trust Limited | Other services | 1993 |
| Holmes Turbine Services Ltd | Professional & scientific | 2021 |
| Holton Farms Limited | Agriculture & fishing | 1974 |
| Home Building & Property Developments Ltd | Construction | 2026 |
| Home Care 24 Limited | Health & social care | 2023 |
| Home Choice Flooring (Skegness) Ltd | Wholesale & retail | 2010 |
| Home Curries Branston Ltd | Hospitality | 2019 |
| Home Farm Homes Limited | Real estate | 2014 |
| Home GLO Ltd | Construction | 2019 |
| Home Green Lincoln Residents Management Company Limited | Extraterritorial | 2019 |
| Home Matchmaker Limited | Real estate | 2013 |
| Home-Made (Yorkshire) Ltd | Construction | 2022 |
| Homeability Limited | Real estate | 2024 |
| Homepitch Ltd | Information & communication | 2023 |
| Homeview Property Investments Limited | Real estate | 2025 |
| Homeview Surveyors Limited | Professional & scientific | 2022 |
| Honey BEE Self Storage, Scunthorpe Ltd | Administrative & support | 2024 |
| Honeycomb Care Ltd | Health & social care | 2018 |
| Honeycomb Care Private Limited | Health & social care | 2025 |
| Honeycombcare Children Services Ltd | Health & social care | 2023 |
| Honeysuckle Homes Ltd | Construction | 2020 |
| Honours Studio Ltd | Professional & scientific | 2025 |
| Hopcroft Consulting Limited | Information & communication | 2014 |
| Hope Meadows Equine Assisted Recovery CIC | Health & social care | 2020 |
| Hope Meadows Ltd | Agriculture & fishing | 2022 |
| Hopelinks Ltd | Health & social care | 2017 |
| Horgan's Ltd | Construction | 2017 |
| Horizon Engineering & Management Ltd | Manufacturing | 2026 |
| Horse IT Into YA Ltd | Hospitality | 2024 |
| Horseshoe Way Management Ltd | Professional & scientific | 2021 |
| Horsley & Bingham Property Management Limited | Hospitality | 2020 |
| Horus ISR Consultancy Limited | Construction | 2018 |
| Hose Wizards Limited | Manufacturing | 2023 |
| Hosni Oncology Limited | Health & social care | 2026 |
| Host Lincoln Limited | Information & communication | 2007 |
| Hot Chocolate Tanning Limited | Other services | 2012 |
| Hot Design Ltd | Professional & scientific | 2008 |
| Hot Desk Lincoln Limited | Real estate | 2021 |
| Hot POT and More Ltd | Hospitality | 2023 |
| Hotel Polurrian (TSP Operations) Limited | Hospitality | 2011 |
| Hotels 4 Horses Ltd | Information & communication | 2024 |
| Houldenstonegroup Ltd | Financial services | 2025 |
| House of Haughton Ltd | Professional & scientific | 2013 |
| House of Itura Ltd | Wholesale & retail | 2025 |
| House of Technology Ltd | Information & communication | 2025 |
| Houseman Homes Limited | Real estate | 2012 |
| Houston Signature Properties Ltd | Real estate | 2024 |
| Houtby Haulage Limited | Transport & logistics | 2002 |
| Howard Pack Consulting Limited | Professional & scientific | 2012 |