| Holbeach ST Marks Community Association Limited | Arts & recreation | 2004 |
| Holbeach Tigers Social Club Limited | Hospitality | 2014 |
| Holbeach Timber Ltd | Wholesale & retail | 2025 |
| Holbeach United Football & Education Academy Ltd | Education | 2021 |
| Holbeach Vacuum Ltd | Wholesale & retail | 2013 |
| Holbrook Holdings (Spalding) Ltd | Financial services | 2026 |
| Holbrook's Refrigeration Ltd | Transport & logistics | 2021 |
| Holender Ltd | Transport & logistics | 2016 |
| Holicon Energy Ltd | Construction | 2019 |
| Holicon Lettings Ltd | Real estate | 2025 |
| Holiday Dreams Ltd | Administrative & support | 2023 |
| Hollen Hand Built Interiors Ltd | Manufacturing | 2023 |
| Holly Blue Homes Ltd | Real estate | 2023 |
| Holly Blue Stays Ltd | Real estate | 2024 |
| Holmes Building and Developments Ltd | Construction | 2024 |
| Holt Consulting Limited | Professional & scientific | 2026 |
| Home and Antiques Jewellers Ltd | Wholesale & retail | 2026 |
| Home and Build Direct Limited | Wholesale & retail | 2020 |
| Home Front Roofing Ltd | Construction | 2025 |
| Homedial Ltd | Real estate | 2025 |
| Homeland Contractors Ltd | Construction | 2015 |
| Homes at HIX Limited | Real estate | 2025 |
| Homes YOU Love UK Ltd | Real estate | 2021 |
| Honey & JAM Ltd | Information & communication | 2023 |
| Honeybun Productions Limited | Information & communication | 2022 |
| Honeypot Nurseries (Weston Hills) Ltd | Administrative & support | 2006 |
| Hopes Racing Ltd | Wholesale & retail | 2026 |
| HOPICANDLES4U Ltd | Wholesale & retail | 2023 |
| Horizon Agricultural Machinery Ltd | Wholesale & retail | 2006 |
| Hot & Spicy Fastfood (Spalding) Ltd | Hospitality | 2024 |
| Hot and Spacey Enterprises Ltd | Arts & recreation | 2005 |
| Hot and Spicy Fastfood Ltd | Hospitality | 2026 |
| Hot and Spicy Recordings Ltd | Information & communication | 2024 |
| Houghton Produce Limited | Agriculture & fishing | 2002 |
| Houndean Ltd | Arts & recreation | 2011 |
| House of Gingerbread Afternoon Teas Ltd | Hospitality | 2020 |
| House of Grey Wolfe Limited | Wholesale & retail | 2023 |
| Housing and Case Management Services Limited | Other services | 2003 |
| Hout Ltd | Construction | 2017 |
| Howard-Rudd Limited | Construction | 2004 |
| Hoyles Farming Limited | Agriculture & fishing | 2003 |
| HPL Property Services Limited | Wholesale & retail | 2020 |
| HQS Utilities Ltd | Construction | 2015 |
| HR & More Ltd | Administrative & support | 2024 |
| HR on TAP Limited | Wholesale & retail | 2002 |
| HS Labour Suppliers Limited | Administrative & support | 2025 |
| HTG Trans Ltd | Transport & logistics | 2020 |
| HTT Investments Limited | Financial services | 2023 |
| Hub of Health Ltd | Information & communication | 2026 |
| Hub Rural Limited | Real estate | 2021 |
| Hudson Parker Ltd | Transport & logistics | 2018 |
| Hull Family Holdings Ltd | Financial services | 2020 |
| Hunstanton SKI Club Limited | Other services | 1975 |
| Hurdletree Associates Ltd | Professional & scientific | 2019 |
| Hurn Properties Limited | Real estate | 2025 |
| Hurn Road Takeaway Ltd | Hospitality | 2024 |
| Hurst Cloud Solutions Limited | Information & communication | 2025 |
| Hutson Engineering Ltd | Other services | 2017 |
| Huzayfa Ltd | Construction | 2025 |
| HW Performance Limited | Wholesale & retail | 2025 |
| Hycon Technologies Limited | Administrative & support | 2001 |
| Hypermat Ltd | Wholesale & retail | 2021 |
| I & B Autos Ltd | Wholesale & retail | 2025 |
| I D Mercer Services Ltd | Administrative & support | 2017 |
| I P P Supplies Limited | Construction | 2019 |
| I&G Products Ltd | Wholesale & retail | 2019 |
| I.E.M.S Group Limited | Construction | 2024 |
| I.M.S. Management Services Limited | Other services | 1994 |
| I.N. Property Services (Lincs) Ltd | Construction | 2025 |
| IAN Brown Electrical Engineers Limited | Construction | 2000 |
| Ian's Carpet Warehouse Limited | Wholesale & retail | 2013 |
| Ianis & Marina Limited | Transport & logistics | 2015 |
| IAR Agri Limited | Administrative & support | 2008 |
| IB & Sons Landscaping Ltd | Administrative & support | 2021 |
| IB Driveways & Landscaping Ltd | Administrative & support | 2021 |
| IB Garage Ltd | Wholesale & retail | 2022 |
| Icaris Limited | Information & communication | 2002 |
| Iceni TM Ltd | Construction | 2018 |
| Iconic Driveways & Patios Limited | Construction | 2026 |
| ID Oakwood Ltd | Administrative & support | 2024 |
| Ideal (Grantham) Ltd | Real estate | 2026 |
| Ideal Admin Ltd | Wholesale & retail | 2014 |
| Ideal Catering Ltd | Manufacturing | 2014 |
| Ideal Equip Ltd | Financial services | 2014 |
| Ideal Gains Ltd | Administrative & support | 2025 |
| Ideal HSM Ltd | Hospitality | 2014 |
| Ideal Prep Ltd | Administrative & support | 2022 |
| Ideal Propre EP 2 Ltd | Real estate | 2026 |
| Ideal Propre EP 3 Ltd | Real estate | 2026 |
| Ideal Propre EP 4 Ltd | Real estate | 2026 |
| Ideal Propre EP1 Ltd | Real estate | 2026 |
| Ideal SS Ltd | Other services | 2014 |
| Ideal(Boston) Ltd | Extraterritorial | 2015 |
| Idias Private Ltd | Real estate | 2019 |
| IDM Force Ltd | Transport & logistics | 2017 |
| Iford Downs Shoot Ltd | Agriculture & fishing | 2010 |
| Iford Shoot Ltd | Agriculture & fishing | 2014 |
| Ignatescu Transport Ltd | Other services | 2019 |
| Igorina Ltd | Transport & logistics | 2019 |
| Igrri Ltd | Transport & logistics | 2016 |