| Hermanos Chick Ltd | Hospitality | 2026 |
| Heron Funding Partners Limited | Financial services | 2026 |
| Hertfordshire Energy Partnerships Limited | Professional & scientific | 2020 |
| Hessle Fork Trucks Limited | Administrative & support | 1994 |
| Hessle Plant Limited | Administrative & support | 1971 |
| Hewitt & Hewitt Ltd | Health & social care | 2019 |
| HH Construction Investments Ltd | Real estate | 2026 |
| Hi-Wire Limited | Manufacturing | 1998 |
| Hidrostal (GB) Limited | Administrative & support | 2006 |
| Hidrostal Limited | Manufacturing | 1979 |
| Higgins Glazing and Locks Ltd | Construction | 2024 |
| Highroof Ltd | Construction | 2021 |
| Hill Top Cafe & Deli Ltd | Hospitality | 2023 |
| Hillcrest Meadows Management Company Limited | Administrative & support | 2016 |
| HN Aesthetics Ltd | Health & social care | 2019 |
| HN Laser Ltd | Health & social care | 2025 |
| Hold Properties Limited | Real estate | 2009 |
| Holdale Auctions Limited | Administrative & support | 2009 |
| Holdale Corporate Trustee LLP | | 2012 |
| Holdale Group (UK) Limited | Professional & scientific | 2009 |
| Hopton Holdings (Ledston) Ltd | Real estate | 2024 |
| Hopton Homes & Investments Limited | Real estate | 2022 |
| Hostelry Ltd | Hospitality | 2021 |
| House of Solo Limited | Information & communication | 2016 |
| HRL Energy Services Ltd | Professional & scientific | 2014 |
| Hsqd Ltd | Administrative & support | 2020 |
| Huddersfield Express Couriers Limited | Transport & logistics | 2002 |
| Humanity 1ST CIC | Education | 2021 |
| Humphreys Holdings Ltd | Financial services | 2020 |
| Hush Tattoo Ltd | Wholesale & retail | 2024 |
| Hutchinson Estate Agents Limited | Real estate | 2024 |
| Hyco Manufacturing Holdings Limited | Financial services | 2025 |
| Hyco Manufacturing Limited | Manufacturing | 1990 |
| Hygiene Supplies Direct Limited | Wholesale & retail | 2002 |
| Hypadan Limited | Manufacturing | 1991 |
| I Love Paradise Pizza Ltd | Hospitality | 2017 |
| I T S Y Propertys Limited | Real estate | 2021 |
| Iclaritate Limited | Information & communication | 2017 |
| Idczak Limited | Transport & logistics | 2015 |
| Ignition Autocare Limited | Wholesale & retail | 2025 |
| Imagination Transport Ltd | Transport & logistics | 2022 |
| IN the Room Ltd | Professional & scientific | 2022 |
| Incident Support Group Limited | Administrative & support | 2009 |
| Incredible Cladding Company Ltd | Manufacturing | 2023 |
| Incrediwell Limited | Wholesale & retail | 1997 |
| Indepth Hygiene Services Limited | Administrative & support | 1970 |
| Indoor Booth Hub Limited | Real estate | 2025 |
| Industrivac UK Ltd | Wholesale & retail | 2015 |
| Infinity Fibre Ltd | Information & communication | 2022 |
| Informed Options Financial Planning Ltd | Financial services | 2012 |
| Inkfuse Uvdtf Ltd | Manufacturing | 2023 |
| INNOV8 Accounting Ltd | Professional & scientific | 2017 |
| Insulation Installers Group Ltd | Construction | 2022 |
| Insulation Installers Yorkshire Ltd | Construction | 2022 |
| Interclean (Hygiene Products) Limited | Wholesale & retail | 2001 |
| Interim Support Healthcare Ltd | Health & social care | 2023 |
| Interiorcurve Ltd | Professional & scientific | 2020 |
| Interiors Online Direct Limited | Wholesale & retail | 2023 |
| Intrinsic Property Limited | Real estate | 2016 |
| IRH Consultants Global Ltd | Information & communication | 2025 |
| Ironman Gates Ltd | Professional & scientific | 2023 |
| IS Centurion Consulting Limited | Other services | 2018 |
| ISG Fleet Group Limited | Other services | 2024 |
| ISG Group Holdings Limited | Administrative & support | 2019 |
| IT Identity Limited | Professional & scientific | 2018 |
| IT Systems Direct Limited | Wholesale & retail | 2025 |
| Itac Limited | Manufacturing | 1951 |
| ITS Investments Limited | Financial services | 2023 |
| IVY RL Limited | Arts & recreation | 2023 |
| Izvi Investments Ltd | Construction | 2020 |
| J & J Industrial Roofing Limited | Manufacturing | 2025 |
| J & W Logistics Ltd | Transport & logistics | 2017 |
| J a C Engineering Solutions Limited | Professional & scientific | 2007 |
| J D Cladding and Roofing Ltd | Construction | 2022 |
| J H Real Estates Ltd | Hospitality | 2025 |
| J Hickman Properties Limited | Real estate | 2022 |
| J R Hill Logistics Ltd | Transport & logistics | 2021 |
| J S C K Limited | Education | 2012 |
| J W Gray Lightning Protection Limited | Construction | 2002 |
| J&A Emerson Ltd | Hospitality | 2025 |
| J&M Autocentre LLP | | 2023 |
| J. Brown Fabrics Limited | Wholesale & retail | 1983 |
| J.C. Powerco Limited | Wholesale & retail | 1993 |
| Jaax DC Ltd | Wholesale & retail | 2021 |
| Jack Autoservices Castleford Limited | Wholesale & retail | 2025 |
| Jack Lane Motors Ltd | Wholesale & retail | 2015 |
| Jack Turpin Transport Ltd | Transport & logistics | 2023 |
| Jacksons Landing Management Company (Womersley) Ltd | Households | 2022 |
| Jacquard Capital Limited | Professional & scientific | 2025 |
| Jade Conservatories (Yorkshire) LLP | | 2016 |
| Jade Garden Wakefield Ltd | Hospitality | 2017 |
| Jallowconstruct Logistics Ltd | Wholesale & retail | 2024 |
| Jamp Compute Limited | Information & communication | 2024 |
| Jan's Food LDT Ltd | Hospitality | 2025 |
| Jander BIN Clean Ltd | Administrative & support | 2024 |
| Jander Wheelie BIN Cleaning Ltd | Administrative & support | 2018 |
| Jape 2022 Limited | Extraterritorial | 2022 |
| JAX Furniture Installations Ltd | Construction | 2019 |
| JB Services Yorkshire Ltd | Wholesale & retail | 2020 |
| JB Signs Ltd | Construction | 2025 |