| Hartlington Fine Arts Limited | Real estate | 1958 |
| Hatmill Ltd | Professional & scientific | 2009 |
| Hatmill Trustee Limited | Administrative & support | 2021 |
| Hawks Food Safety Ltd | Professional & scientific | 2025 |
| Hawksmoor Court (Ripon) Management Company Limited | Households | 2008 |
| Hayward Cosmetics Ltd | Other services | 2020 |
| HC Property Development Limited | Administrative & support | 2017 |
| Hcfm Ltd | Households | 2020 |
| HCK9 Ltd | Information & communication | 2023 |
| Hdrake Socials Ltd | Professional & scientific | 2026 |
| Hear and NOW Limited | Wholesale & retail | 2018 |
| Heaton Living Ltd | Administrative & support | 2026 |
| Heavenly Pet Treats Ltd | Wholesale & retail | 2021 |
| Helen Coyle Limited | Professional & scientific | 2005 |
| Hemingways Group Holdings Ltd | Other services | 1934 |
| Hemingways Limited | Other services | 1963 |
| Henki Bespoke Furniture Makers Limited | Manufacturing | 2022 |
| Henley Contracting Limited | Administrative & support | 2000 |
| Henley Event Contracting Limited | Administrative & support | 2013 |
| Henley Investment Properties Limited | Real estate | 2020 |
| Hepios Management Consultants Limited | Professional & scientific | 2023 |
| Herd Art Studio Ltd | Arts & recreation | 2020 |
| Hesland Green Limited | Professional & scientific | 2012 |
| HG Dentistry Ltd | Health & social care | 2024 |
| HG4 Productions Ltd | Information & communication | 2023 |
| Hifex Ltd | Wholesale & retail | 2025 |
| High Agra Consultancy Ltd | Real estate | 2005 |
| High Moor Artist Management Company Limited | Other services | 2004 |
| High Moor Records Limited | Information & communication | 2004 |
| High Quality Telecommunications Limited | Information & communication | 2001 |
| Highacre Builders Limited | Construction | 1991 |
| Higher Hire Limited | Administrative & support | 2023 |
| Hilltop Consulting Services Ltd | Professional & scientific | 2016 |
| Hirsts Management Ltd | Hospitality | 2021 |
| HIT by a BUS Limited | Information & communication | 2024 |
| Hitchen Partners Limited | Agriculture & fishing | 2016 |
| HJ Global Logistics Ltd | Transport & logistics | 2025 |
| HOG Roast Caterers Ltd | Hospitality | 2007 |
| Holt Storage Systems Ltd | Manufacturing | 2010 |
| Home Farm Holdings Ltd | Agriculture & fishing | 2023 |
| Home Space Builders Ltd | Construction | 2013 |
| Homebird Property Management Ltd | Real estate | 2021 |
| Homebird Property Solutions Limited | Real estate | 2018 |
| Honey Brickworks Ltd | Construction | 2024 |
| Hope Birth Services Ltd | Health & social care | 2025 |
| Hoss Transport Ltd | Transport & logistics | 2025 |
| Hotech Limited | Information & communication | 2007 |
| House of Pixiedust Limited | Administrative & support | 2025 |
| HR Ally Ltd | Administrative & support | 2019 |
| HR Joinery Ltd | Manufacturing | 2013 |
| Hunt Demolition Limited | Construction | 2019 |
| Hunt.I Ltd. | Administrative & support | 2018 |
| Hutchinson & Buchanan LLP | | 2013 |
| Hutchinsons Fabrications Limited | Manufacturing | 2006 |
| Hutton Commercial Limited | Professional & scientific | 2008 |
| Hwyl Outdoor Sauna Ltd | Arts & recreation | 2025 |
| Hygienic Cladding Solutions Limited | Construction | 2005 |
| Hyperbaric Oxygen Therapy (Ripon) Limited | Health & social care | 2025 |
| Hyvechain Ltd | Information & communication | 2026 |
| I'Anson Bros. (Holdings) Limited | Financial services | 1996 |
| I3D Ltd | Wholesale & retail | 2023 |
| IAN Pybus Build & Groundworks Ltd | Construction | 2025 |
| Ibusinesscoach Ltd | Administrative & support | 2012 |
| Ice Holiday Homes Limited | Hospitality | 2021 |
| Ichiasm Limited | Professional & scientific | 2016 |
| Iddesleigh House Management Limited | Real estate | 2010 |
| IJ7 Ltd | Professional & scientific | 2022 |
| IJG Services Ltd | Construction | 2019 |
| Ikaria Limited | Professional & scientific | 2012 |
| Ikwhospitality Limited | Hospitality | 2025 |
| Image Project Solutions Ltd | Construction | 2011 |
| Inclusive Learning Systems Ltd | Education | 2014 |
| Inclusivity First Limited | Professional & scientific | 2023 |
| Indo - Myanmar Conservation | Other services | 2008 |
| Infinity Lighting Ltd | Wholesale & retail | 2017 |
| Innovative Aviation (Leeds) Limited | Transport & logistics | 2008 |
| Installd Ltd | Construction | 2025 |
| Intense Studio Ltd | Information & communication | 2025 |
| Interiors by Alana Ltd | Construction | 2025 |
| Intune Car Services (Harrogate) Ltd | Wholesale & retail | 2014 |
| Isla Project Ltd | Information & communication | 2020 |
| ISS Projects (UK) Limited | Manufacturing | 2015 |
| J B Rodney Ltd | Construction | 2022 |
| J Blakey Transport Limited | Transport & logistics | 2012 |
| J C T D LLP | | 2024 |
| J Chiu Property Solutions Ltd | Real estate | 2021 |
| J D T Consultancy (Yorkshire) Limited | Professional & scientific | 2026 |
| J H M Dods Ltd | Agriculture & fishing | 2025 |
| J K Global Investment Distribution Ltd | Financial services | 2006 |
| J S Alton & SON Limited | Agriculture & fishing | 2008 |
| J W a Shopfitting Solutions Ltd | Construction | 2019 |
| J W Caravan Sales Limited | Wholesale & retail | 2023 |
| J W Properties (Devon) Limited | Hospitality | 2019 |
| J.A Services (Ripon) Limited | Wholesale & retail | 2015 |
| J.G. Pears Limited | Financial services | 2011 |
| J.K. Rogers & SON Limited | Agriculture & fishing | 1964 |
| Jackpot Shot Ltd | Arts & recreation | 2026 |
| Jacksons Motor Engineers Limited | Wholesale & retail | 2014 |
| Jagpag Holdings Ltd | Wholesale & retail | 2022 |
| Jaktad Ltd | Real estate | 2025 |