| Hector and Pablo Ltd | Professional & scientific | 2021 |
| Henley Granite, Quartz & Marble Ltd | Construction | 2018 |
| Hepworth Brothers Limited | Manufacturing | 2019 |
| Herd Butchers Grill Ltd | Hospitality | 2024 |
| Hesketh GAS Limited | Construction | 2008 |
| Hexcreations Ltd | Wholesale & retail | 2025 |
| HF Retail Ltd | Wholesale & retail | 2024 |
| HIG Operator Ltd | Wholesale & retail | 2021 |
| Higgins & Stocks Limited | Health & social care | 1997 |
| Hillbeck Homes Ltd | Construction | 2017 |
| Hiring Heroes Limited | Administrative & support | 2019 |
| Hishersandtheirs Limited | Wholesale & retail | 2026 |
| Hitch & Midgley Properties Ltd | Real estate | 2021 |
| HJM Group Ltd | Construction | 2019 |
| HLG Complex Care Ltd | Health & social care | 2022 |
| Hnlmotors Ltd | Wholesale & retail | 2023 |
| Hoar Cross Care Limited | Health & social care | 2004 |
| Hogan Communications Limited | Information & communication | 2018 |
| Holly Barratt Hairdressing Ltd | Other services | 2022 |
| Holmleigh Developments (Huddersfield) Limited | Professional & scientific | 1985 |
| Holy Homestays Ltd | Construction | 2019 |
| Home Appliance Services (North) Limited | Other services | 2006 |
| Homefactree Limited | Manufacturing | 2022 |
| HOP (Holdings) Limited | Professional & scientific | 2014 |
| Hope & Faith Healthcare Limited | Administrative & support | 2015 |
| Horbury Ales Limited | Manufacturing | 2015 |
| House Line Property Management Limited | Real estate | 2017 |
| House Medics Limited | Construction | 2007 |
| House Proud Cleaners Limited | Other services | 2014 |
| HQA Homes Ltd | Construction | 2021 |
| HR Advertisements Ltd | Professional & scientific | 2025 |
| HR Care Services Ltd | Health & social care | 2026 |
| HSR Property (Yorkshire) Limited | Real estate | 2014 |
| Hudson Labs Ltd | Information & communication | 2025 |
| Hughes Recruitment Solutions Limited | Administrative & support | 2012 |
| Hunta Hardware Limited | Wholesale & retail | 2020 |
| Hunter Holdings (Property) Limited | Real estate | 2018 |
| Hutchinson Demolition & Dismantling Ltd | Construction | 2010 |
| Hutchinson Electrical Engineering Limited | Manufacturing | 2014 |
| HVB Financial Solutions Ltd | Professional & scientific | 2025 |
| Hydro Building Services Limited | Construction | 2006 |
| Hydro Properties (Yorkshire) Limited | Construction | 2024 |
| Hydro Renewables Limited | Construction | 2021 |
| I Sing to Learn Limited | Education | 2015 |
| I&M Group Limited | Financial services | 2020 |
| I.Q Labels Ltd | Manufacturing | 2018 |
| IAN Fraser SPV Limited | Other services | 2019 |
| IAN Whitehead Electrical Ltd | Construction | 2019 |
| IB Construction (UK) Limited | Construction | 2005 |
| Ibaka Limited | Water & waste | 2026 |
| Idesign Fabrications Limited | Manufacturing | 2024 |
| Idesign Ossett Kennels Limited | Agriculture & fishing | 2025 |
| IDS Inventories Ltd | Households | 2021 |
| Illingworth Developments Ltd | Construction | 2023 |
| Image Enterprise Ltd | Other services | 2013 |
| Immortalise ME Ltd | Professional & scientific | 2022 |
| Impact Properties (Yorkshire) Limited | Real estate | 2018 |
| Impact Signs (Yorkshire) Limited | Professional & scientific | 2018 |
| Impactiqai Ltd | Information & communication | 2025 |
| Impeccable Spaces Ltd | Real estate | 2024 |
| Imperial Metric Ltd. | Information & communication | 2013 |
| Infinite Resin Flooring Ltd | Construction | 2026 |
| Infiniti Service Specialists Ltd | Wholesale & retail | 2020 |
| Infinity Car Sales Ltd | Wholesale & retail | 2019 |
| Infitness Limited | Wholesale & retail | 2013 |
| Infrared Manufacturing Limited | Wholesale & retail | 2019 |
| Ings Mill Complex Ltd | Real estate | 2023 |
| Inspire Partnership Multi Academy Trust | Education | 2011 |
| Inspired Driveways & Patios Ltd | Construction | 2025 |
| Inspired Sales & Marketing Ltd | Wholesale & retail | 2024 |
| Integrity Tattoo Lounge Limited | Other services | 2011 |
| Integrity Workspace Limited | Real estate | 2017 |
| Integrum Building Services Engineering Consultants Ltd | Financial services | 2019 |
| Intu Everything Limited | Wholesale & retail | 2016 |
| Intu Tech (North East) Limited | Construction | 2012 |
| Invent Limited | Manufacturing | 1996 |
| Inventive I.T. Services Limited | Information & communication | 2007 |
| Investabuild Construction Ltd | Construction | 2018 |
| Investments.Mb Limited | Households | 2026 |
| IOS (Yorkshire) Limited | Administrative & support | 2010 |
| IPB Fabrications Ltd | Manufacturing | 2013 |
| IPT Logistics Limited | Transport & logistics | 2015 |
| Island Healthcare Services Limited | Administrative & support | 2024 |
| Itledu Services Ltd | Real estate | 2024 |
| J Appleyard Ltd | Professional & scientific | 2025 |
| J D Cladding and Roofing Specialist Ltd | Construction | 2025 |
| J F N C Limited | Professional & scientific | 2011 |
| J Humphreys Portfolios Ltd | Real estate | 2022 |
| J&D Supplies Ltd | Wholesale & retail | 2023 |
| J.A.N.E Properties Ltd | Real estate | 2025 |
| J.M. Business Supplies Limited | Wholesale & retail | 1998 |
| J40 Carpets and Flooring Limited | Wholesale & retail | 2019 |
| J40 Lettings Ltd | Real estate | 2023 |
| Jackson, Jackson Limited | Professional & scientific | 2002 |
| Jacksons Warehousing Limited | Transport & logistics | 1977 |
| JAE Transport Ltd | Transport & logistics | 2025 |
| James Gardner P&H Limited | Construction | 2012 |
| James Power Fight Academy Limited | Education | 2026 |
| Jamesdmerrion Ltd | Construction | 2025 |
| Jara Engineering Limited | Construction | 2014 |