| Halo Personnel Limited | Administrative & support | 2009 |
| Halo Travel & Events Ltd | Transport & logistics | 2025 |
| HALO400 Limited | Information & communication | 2005 |
| Hambleton Incorporated Limited | Wholesale & retail | 2021 |
| Hamilton York Limited | Hospitality | 2026 |
| Hamish Irvine Wedding Photographer Limited | Professional & scientific | 2016 |
| Hancock Lettings Ltd | Real estate | 2024 |
| Hancockinstallations Limited | Construction | 2025 |
| Handletrade Limited | Wholesale & retail | 2012 |
| Handy Hancock Ltd | Construction | 2021 |
| Handy Straps Limited | Wholesale & retail | 2008 |
| Hanley Keys Limited | Real estate | 2013 |
| Hanleys Joinery & Maintenance Ltd | Construction | 2022 |
| Hanna Civil Engineering Limited | Construction | 1996 |
| Hanson Developments Ltd | Construction | 2023 |
| Hanson’S Electrical Contractors Ltd | Manufacturing | 2020 |
| Happy Banana Club Ltd | Hospitality | 2024 |
| Happy Garden Barnsley Ltd | Hospitality | 2026 |
| Happy Homes Residential Letting Ltd | Real estate | 2018 |
| Happysphinx Limited | Information & communication | 1996 |
| Harben Management Services Ltd | Administrative & support | 2016 |
| Harcus Sinclair LLP | | 2015 |
| Hardwick Construction Limited | Construction | 2013 |
| Hardwick Development Ltd | Administrative & support | 1999 |
| Hardyvdubs Ltd | Wholesale & retail | 2020 |
| Hardy’S Hospitality Limited | Hospitality | 2024 |
| Hargreaves Utilities Ltd | Construction | 2017 |
| Harian Ltd | Other services | 2020 |
| Harlequins (Mapperly) Management Company Limited | Real estate | 2004 |
| Harliboo Limited | Administrative & support | 2015 |
| Harliv Limited | Real estate | 2020 |
| Harmony Supported Living Limited | Health & social care | 2015 |
| Harper Sanderson Ltd | Professional & scientific | 2022 |
| Harrington Wells Ltd | Construction | 2024 |
| Harris & Co Financial Planning Limited | Financial services | 2020 |
| Harris & Co Limited | Professional & scientific | 2014 |
| Harris & Co Trustees Limited | Professional & scientific | 2022 |
| Harrison Family Investment & Building Ltd | Real estate | 2021 |
| Harry Bullen Ltd | Administrative & support | 2025 |
| Harshl | Other services | 2016 |
| Hartcliff Limited | Professional & scientific | 2014 |
| Hartley Aesthetics Limited | Other services | 2008 |
| Hartley's Homes (South Yorkshire) Limited | Real estate | 2025 |
| Hartshead Engineering Services Limited | Manufacturing | 2018 |
| Harvie Construction Investment Ltd | Real estate | 2023 |
| Harvie Construction Limited | Construction | 2019 |
| Haslam Estates Ltd | Real estate | 2018 |
| Haslam Holdings Ltd | Financial services | 2018 |
| Haslam Transport Ltd | Transport & logistics | 2009 |
| Hathorn Square at Rodley Management Limited | Real estate | 2007 |
| Haughton Textiles Limited | Administrative & support | 2014 |
| Haulage Solutions Ltd | Transport & logistics | 2019 |
| Haus of Pilates Barnsley Limited | Arts & recreation | 2025 |
| Haus of Thrills Ltd | Extraterritorial | 2024 |
| Haute Complexion Ltd | Health & social care | 2023 |
| Havelock Group Ltd | Professional & scientific | 2025 |
| Havelock Investments Ltd | Hospitality | 2019 |
| Haven & Homes Ltd | Real estate | 2025 |
| Haven Fish & Chips Ltd | Hospitality | 2025 |
| Havin 12 Pizza Ltd | Hospitality | 2026 |
| Havnly Supply Ltd | Wholesale & retail | 2025 |
| Hawcroft Properties Ltd | Construction | 2026 |
| Hawk Lifting (Engineering) Limited | Professional & scientific | 2012 |
| Hawk Lifting Limited | Manufacturing | 2008 |
| Hawshaw Estates Ltd | Real estate | 2026 |
| Hawshaw Land Management Company Limited | Households | 2024 |
| Hawshaw Ltd | Construction | 2019 |
| Hawthorne House of Flowers Ltd | Wholesale & retail | 2017 |
| HAY Carr Limited | Real estate | 2016 |
| HAY Green Court Management Ltd | Real estate | 2024 |
| Haycock & Todd Limited | Professional & scientific | 1996 |
| Haycon Developments Limited | Construction | 2024 |
| Haydock House Limited | Real estate | 2017 |
| Hayes Fencing & Sheds Ltd | Manufacturing | 2009 |
| Hayselden Estates Ltd | Real estate | 2019 |
| Hayselden Properties Ltd | Construction | 2019 |
| Haywood and Padgett Holdings Limited | Financial services | 2023 |
| Haywood’S Properties Ltd | Real estate | 2023 |
| Hazel Health Consulting Limited | Professional & scientific | 2013 |
| HB Datatech Ltd | Information & communication | 2014 |
| HB Land and Property Limited | Real estate | 2024 |
| HB Property Holdings Limited | Real estate | 2015 |
| HBD Property Limited | Construction | 2024 |
| HBG Homes Limited | Real estate | 2025 |
| HBS (Yorkshire) Ltd | Construction | 2023 |
| HBS Joinery Ltd | Construction | 2026 |
| HBS Properties (Yorkshire) Ltd | Real estate | 2025 |
| HBW Group Ltd | Financial services | 2024 |
| HBW Law Limited | Professional & scientific | 2017 |
| HBW Property Limited | Real estate | 2023 |
| Hcat | Education | 2013 |
| HCC Mastic Sealing Ltd | Construction | 2026 |
| HCK Design Construction Ltd | Real estate | 2018 |
| HD Mobile Carpets and Flooring Limited | Wholesale & retail | 2021 |
| HD Shimmer Nails Ltd | Other services | 2021 |
| HD Stove Glass UK Ltd | Wholesale & retail | 2020 |
| HDL Property Solutions Ltd | Real estate | 2019 |
| Healing Hand Ayurveda Ltd | Health & social care | 2024 |
| Health Safety Plant Training & Consultancy Ltd | Education | 2022 |
| Healthcare Engineering Support Ltd | Professional & scientific | 2022 |