| Harry Quested Ltd | Professional & scientific | 2021 |
| Hart Properties and Warehousing Ltd | Transport & logistics | 2023 |
| Hart Services (Lincs) Ltd | Agriculture & fishing | 2019 |
| Harvest Wright Ltd | Financial services | 2024 |
| Harvey's Barn Ltd | Professional & scientific | 2021 |
| Haven Care Solutions Limited | Administrative & support | 2021 |
| Haven Recruitment Ltd | Administrative & support | 2021 |
| Hawkeye Drones Ltd | Wholesale & retail | 2016 |
| Hawkswood Agricultural Coatings Ltd | Construction | 2020 |
| Hawkswood on Site Spraying Services Ltd | Construction | 2020 |
| Hawkswood Vehicle Sales Ltd | Wholesale & retail | 2025 |
| Hawthorne Capital Ltd | Real estate | 2018 |
| HAY Farming Group Limited | Professional & scientific | 1993 |
| HAY Farming Limited | Agriculture & fishing | 1982 |
| Haynes Energy Services Ltd | Construction | 2011 |
| Hazdrian Ltd | Wholesale & retail | 2025 |
| HB (NO 1) Holdings Limited | Professional & scientific | 2021 |
| HC Home Improvements Ltd | Construction | 2021 |
| HC Tyres Ltd | Wholesale & retail | 2022 |
| Head Tilt Games Ltd | Information & communication | 2019 |
| Headlift Ltd | Administrative & support | 2022 |
| Headlock Escape Rooms Ltd | Arts & recreation | 2019 |
| Healey & Dobney Limited | Agriculture & fishing | 1955 |
| Healthcare 24/7 Limited | Health & social care | 2018 |
| Healthy Happenings Limited | Financial services | 2019 |
| Heathcote Properties Ltd | Real estate | 2018 |
| Hedaux Motor Company Ltd | Wholesale & retail | 2014 |
| Hedonism (Spalding) Limited | Other services | 2004 |
| Hefford Building Consultants Limited | Professional & scientific | 2007 |
| Hejznerek Ltd | Transport & logistics | 2015 |
| Helios UK Bidco Limited | Financial services | 2026 |
| Helios UK Midco Limited | Financial services | 2026 |
| Helios UK Pledgeco Limited | Financial services | 2026 |
| Helios UK Topco Limited | Financial services | 2026 |
| Hellenic Delight Ltd | Wholesale & retail | 2024 |
| Hemhem Records Limited | Arts & recreation | 2010 |
| Hemmant Building Consultancy Service Ltd | Construction | 2013 |
| Hemmant Ltd | Real estate | 2018 |
| Henge 7 Medical Limited | Health & social care | 2009 |
| Henrith Business Centres Ltd | Extraterritorial | 2021 |
| Henrith Ltd | Real estate | 2021 |
| Henrith Properties Ltd | Financial services | 2021 |
| Henry G Ltd | Transport & logistics | 2014 |
| Henry Hargrave & Company Limited | Professional & scientific | 1973 |
| Henry’S Bakehouse Ltd | Manufacturing | 2024 |
| Herbal Solutions Ltd | Manufacturing | 2010 |
| Heritage Fencing Group Limited | Administrative & support | 2026 |
| Herman A.M Ltd | Transport & logistics | 2016 |
| Hermetia Properties Limited | Households | 2025 |
| Heroes Gym Limited | Arts & recreation | 2014 |
| Hers N Sirs Ltd | Other services | 2015 |
| Hewitt & Maher Property Ltd | Real estate | 2021 |
| Hewitt Legacy Ltd | Real estate | 2022 |
| Hezzo Gurmakev Ltd | Wholesale & retail | 2022 |
| HGA Media Limited | Information & communication | 2025 |
| HGP (Midlands) Ltd | Transport & logistics | 2025 |
| HGV1 Radio Limited | Information & communication | 2024 |
| HI Shine Cleaners Spalding Ltd | Administrative & support | 2024 |
| HI Tech Park Homes Ltd | Construction | 2025 |
| High Street (Spalding) Management Company Limited | Households | 2015 |
| Highgrove Homes (Spalding) Limited | Real estate | 2018 |
| Highgrove Homes Holdings (Spalding) Limited | Financial services | 2021 |
| Highgrove Master Masonry Ltd | Construction | 2020 |
| Highpoint Roofing & Upvc Specialist Ltd | Construction | 2024 |
| Highstandardecorating Ltd | Construction | 2025 |
| Hightop Property Investors Ltd | Real estate | 2025 |
| Highway Repairs Ltd | Construction | 2021 |
| Highways UK Contracting Ltd | Construction | 2024 |
| Hill Farm Contracting Services Ltd | Agriculture & fishing | 2023 |
| Hillier Business Services Limited | Professional & scientific | 2015 |
| Hills Retail Stores Limited | Wholesale & retail | 1994 |
| Hills Welding and Fabrication Limited | Professional & scientific | 2024 |
| Hilton Holdings (Lincs) Limited | Real estate | 2020 |
| Hind Amusements Limited | Arts & recreation | 2026 |
| Hindley Holidays Limited | Hospitality | 2016 |
| Hippo Showers Ltd | Wholesale & retail | 2022 |
| Hippo Transport Ltd | Transport & logistics | 2024 |
| Hireforce Rentals Ltd | Water & waste | 2014 |
| Hive Property Rentals Ltd | Real estate | 2024 |
| Hjgarageconversions Ltd | Construction | 2026 |
| HJK Developments (Fleet) Ltd | Construction | 2022 |
| HJK Developments Ltd | Real estate | 2022 |
| Hlbeach UK Ltd | Hospitality | 2024 |
| HM Contractors Ltd | Construction | 2024 |
| Hmbl Group Ltd | Wholesale & retail | 2026 |
| HMW Operational Support Limited | Extraterritorial | 2025 |
| Hoddins Way Ltd. | Construction | 2012 |
| Hodges & Nolan Limited | Financial services | 2024 |
| Holbeach Barbers Limited | Other services | 2024 |
| Holbeach Cars Ltd | Wholesale & retail | 2024 |
| Holbeach Chippy Ltd | Hospitality | 2026 |
| Holbeach Christmas Lighting C.I.C. | Health & social care | 2024 |
| Holbeach City Tyres Ltd | Wholesale & retail | 2025 |
| Holbeach Community Cafe Ltd | Hospitality | 2017 |
| Holbeach Computing Solutions Ltd | Information & communication | 2014 |
| Holbeach Developments (UK) Limited | Financial services | 2017 |
| Holbeach Film Company Limited | Information & communication | 2019 |
| Holbeach Fuel Station Ltd | Wholesale & retail | 2024 |
| Holbeach Motor Sales Limited | Wholesale & retail | 2020 |
| Holbeach Road Mini Market Ltd | Wholesale & retail | 2025 |