| Hainsprop Limited | Real estate | 2018 |
| Hairpiecesdirect Ltd | Wholesale & retail | 2020 |
| Half Blue | Professional & scientific | 2012 |
| Halifax Campervan Conversions Ltd | Manufacturing | 2019 |
| Halifax Campervan Hire Ltd | Administrative & support | 2021 |
| Halifax Canoe Club Limited | Arts & recreation | 1991 |
| Halifax Choral Society (1817) Limited | Arts & recreation | 1993 |
| Halifax Motor Co. Limited | Wholesale & retail | 1998 |
| Hall Glazing Ltd | Construction | 2014 |
| Halliwell Property Ltd | Real estate | 2023 |
| Hames Limited | Administrative & support | 2003 |
| HAN HAN Design Ltd | Professional & scientific | 2025 |
| Handyman 24/7 Ltd | Construction | 2026 |
| HAO Great Trading Ltd | Wholesale & retail | 2025 |
| HAO Tian Trading Ltd | Wholesale & retail | 2025 |
| HAO Trading Ltd | Wholesale & retail | 2025 |
| Happydays Cycles & Community Hub CIC | Wholesale & retail | 2018 |
| Happyy Trading Ltd | Wholesale & retail | 2025 |
| Hardcastle and Co Accountants Limited | Professional & scientific | 2011 |
| Harry Travis (Rishworth) Limited | Agriculture & fishing | 1983 |
| Hayat Rose Ltd | Hospitality | 2025 |
| HD Lettings Limited | Real estate | 2014 |
| Hdhuk Ltd | Other services | 2020 |
| Hear Happy Ltd | Health & social care | 2020 |
| Hedgehog Hollow Ltd | Manufacturing | 2025 |
| Heroes Heating and Plumbing Ltd | Construction | 2018 |
| HIC Property Renovations Ltd | Construction | 2021 |
| Highbury CBC Limited | Professional & scientific | 2009 |
| Highcliffe Equipment Ltd | Administrative & support | 2010 |
| Hill and Dale Holdings Limited | Financial services | 2019 |
| Hill and Dale Outdoors Limited | Other services | 2017 |
| Hill Crest Bowling Club (Sowerby Bridge) Limited | Arts & recreation | 1913 |
| Hillmoor Limited | Information & communication | 2015 |
| Hinsley & Dawson Builders & Joiners Limited | Construction | 2007 |
| Hogshead Brewhouse Limited | Manufacturing | 2014 |
| Holbrook Heating Services Ltd | Construction | 2025 |
| Holby Commercial Ltd | Real estate | 2022 |
| Hollander Limited | Construction | 2022 |
| Hollins Mill Apartments Management Company Limited | Households | 2019 |
| Home Valley Homes Ltd | Real estate | 2023 |
| Honig Klause Heidenau UK Ltd | Hospitality | 2019 |
| Hooson Developments Ltd | Construction | 2012 |
| Hoppy Hogs Limited | Real estate | 2020 |
| Hornsey Enterprises Ltd | Arts & recreation | 2015 |
| Hornsey Logistics Ltd | Transport & logistics | 2017 |
| House of Cloelle Ltd | Manufacturing | 2022 |
| Housing Strategy Ltd | Real estate | 2016 |
| Hrlandscaping Ltd | Administrative & support | 2026 |
| Huawei Z Trading Ltd | Wholesale & retail | 2025 |
| Huddersfield Accident Repair Centre Limited | Real estate | 1976 |
| Hugo & Fold Ltd | Manufacturing | 2026 |
| Hulk Canis Limited | Hospitality | 2025 |
| Huoping Technology Co., Limited | Wholesale & retail | 2022 |
| HX Energy Ltd | Professional & scientific | 2025 |
| HX6-IT Limited | Professional & scientific | 2025 |
| Hxdesserts Ltd | Manufacturing | 2026 |
| Hålo Tėch Globål Limited | Information & communication | 2025 |
| IAN Mawer Metal Spinners Limited | Manufacturing | 2011 |
| Iball Academy Ltd | Education | 2018 |
| Imperial Hospitality Limited | Real estate | 2011 |
| Indii Brew Co. Ltd | Wholesale & retail | 2020 |
| Industrial Asset Holdings Ltd | Real estate | 2025 |
| Inphase Mobile MRI Services Ltd | Health & social care | 2017 |
| Intabrands Ltd | Wholesale & retail | 2018 |
| Inter-Bed (Halifax) Limited | | 1985 |
| Investor Manage Limited | Information & communication | 2018 |
| Iphone Doctor Ltd | Other services | 2017 |
| IST Technology Services Ltd | Information & communication | 2025 |
| Istanbul Barbers Sowerby Ltd | Other services | 2024 |
| Ivanov Property Limited | Real estate | 2025 |
| J & S Taylor Limited | Manufacturing | 1991 |
| J Duffy Transport Ltd | Transport & logistics | 2025 |
| J Motors Ripponden Ltd | Wholesale & retail | 2024 |
| J&M Creatives Ltd | Professional & scientific | 2022 |
| Jack Whitaker Limited | Construction | 2003 |
| Jacs Boutique Ltd | Wholesale & retail | 2024 |
| Jammy Go Ryde Ltd | Transport & logistics | 2026 |
| Janthoo Ltd | Wholesale & retail | 2023 |
| Jason B Wade Limited | Professional & scientific | 2012 |
| JBS Dog Walking Services Limited | Administrative & support | 2024 |
| JCL Joinery Ltd | Construction | 2013 |
| JD Property Services Ltd | Real estate | 2024 |
| JDA Building Services Ltd | Construction | 2025 |
| Jerry Wadsworth & SON Limited | Real estate | 1918 |
| JG Clothing Ltd | Wholesale & retail | 2025 |
| JG Properties Halifax Limited | Real estate | 2026 |
| JHP Commercial Limited | Real estate | 2020 |
| JHP Estates LLP | | 2017 |
| JHP Holdings Limited | Construction | 2016 |
| JIN Weng Limited | Hospitality | 2020 |
| Jing Jing Ltd | Hospitality | 2021 |
| JLA Fire & Security Limited | Public administration | 2008 |
| JLA Hvac Limited | Construction | 2011 |
| JMP Property Management Ltd | Real estate | 2015 |
| JMT Fitness Ltd | Arts & recreation | 2018 |
| JOE Finegold Ltd | Information & communication | 2022 |
| Joey VON Bradford Productions Ltd | Information & communication | 2020 |
| John Woods Plumbing & Heating (Halifax) Limited | Construction | 2003 |
| Jonas-Malik Ltd | Health & social care | 2016 |
| Joseph Sutcliffe & SON Limited | Construction | 1930 |