| Heit LR Limited | Other services | 2013 |
| Heit PW Limited | Other services | 2017 |
| Heit PW2 Limited | Other services | 2018 |
| Heit RH Limited | Other services | 2021 |
| Heit WG Limited | Other services | 2021 |
| Helen Bourner Associates Ltd | Professional & scientific | 2020 |
| Helena Amour Limited | Other services | 2015 |
| Helloknaresborough Ltd | Wholesale & retail | 2025 |
| Hemingbrough Holdings Ltd | Financial services | 2019 |
| Hendo Holdings Ltd | Construction | 2020 |
| Herdsmans Court Management Company Limited | Households | 2017 |
| Hereford Holdings Limited | Financial services | 2016 |
| Heritage in HER Hands C.I.C. | Manufacturing | 2025 |
| Heroquip Limited | Wholesale & retail | 2023 |
| HG1BUILD Limited | Construction | 2011 |
| HG3 Limited | Manufacturing | 2003 |
| HG5 Creative Ltd. | Administrative & support | 2012 |
| HG5 Padel Limited | Arts & recreation | 2026 |
| HI Consulting Service Ltd | Professional & scientific | 2023 |
| Hidden Falls Ltd | Hospitality | 2026 |
| Hidra Ltd | Professional & scientific | 2024 |
| High Bridge Court (Knaresborough) Management Limited | Households | 2011 |
| High Bridge House Management Limited | Households | 2017 |
| High Moor Pastures Limited | Construction | 2021 |
| High Street Knaresborough Management Company Limited | Households | 2003 |
| Highfield Car & Commercial Limited | Wholesale & retail | 2010 |
| Highwire Communications Limited | Professional & scientific | 2018 |
| HIJ Property Ltd | Real estate | 2025 |
| Hire-Local Ltd | Administrative & support | 2026 |
| Hmca at Home Limited | Health & social care | 2024 |
| Hmca Care Limited | Financial services | 2016 |
| Hmca Estates Limited | Real estate | 2022 |
| Hmca Solutions Limited | Information & communication | 2008 |
| Hmca/S PLC | Financial services | 1978 |
| Hmcp Cleaning Services Ltd | Administrative & support | 2025 |
| Hodgsons & Mortimer LLP | | 2010 |
| Hoist and Shower Chair Company Ltd | Construction | 2002 |
| Holly Elizabeth Limited | Real estate | 2026 |
| Holts Battlefield & History Tours Limited | Administrative & support | 2016 |
| Home House Buyers Ltd | Real estate | 2015 |
| Home House Buyers SPV1 Ltd | Real estate | 2024 |
| Home on the Road Ltd | Hospitality | 2022 |
| Hope and Anchor Enterprises Limited | Administrative & support | 2022 |
| Horizon Accounting Ltd | Professional & scientific | 2023 |
| Horizon Hub Ltd | Education | 2022 |
| Horto Everyday Spaces Ltd | Construction | 2015 |
| Hospitality Horizons Ltd | Professional & scientific | 2023 |
| HP Polo Ltd | Arts & recreation | 2024 |
| HSS Leisure Limited | Real estate | 2021 |
| Hudson Lees Limited | Professional & scientific | 2002 |
| Hughes Dental Laboratory Limited | Health & social care | 2012 |
| Humruddy Services Ltd | Professional & scientific | 2019 |
| Hunmanby Cottages Limited | Real estate | 2021 |
| Huttons Butchers Limited | Real estate | 2006 |
| HWL Retail Ltd | Wholesale & retail | 2020 |
| Hypnotherapy & Psychotherapy CIC | Other services | 2020 |
| I - CT600 Ltd | Information & communication | 2010 |
| I C Green & SON Limited | Agriculture & fishing | 1998 |
| I&E Richards Properties Limited | Financial services | 2025 |
| I-Grit Limited | Administrative & support | 2021 |
| I2R Projects Ltd | Professional & scientific | 2022 |
| Icka Ltd | Hospitality | 2026 |
| Igneus Ovens Ltd | Extraterritorial | 2020 |
| Igoconcepts Limited | Extraterritorial | 2011 |
| IJW Holdings Limited | Professional & scientific | 2004 |
| Ikon Architecture Limited | Professional & scientific | 2018 |
| Imes Engineering & Contracting Ltd | Construction | 2009 |
| Indulge at the Park Limited | Hospitality | 2010 |
| Indulgence by Flamingos Ltd | Hospitality | 2026 |
| Inglish Design Ltd | Manufacturing | 2007 |
| Injico Ltd | Manufacturing | 2024 |
| INK North Creative Ltd | Arts & recreation | 2023 |
| Insight Solutions Limited | Administrative & support | 2006 |
| Inspired Usability Limited | Professional & scientific | 2017 |
| Integral IT Services Limited | Information & communication | 2006 |
| Integrity Quest Solutions Ltd | Other services | 2024 |
| Intelligent Car Finance Limited | Financial services | 2024 |
| Intelligent Foods Central Ltd | Hospitality | 2009 |
| Intelligent Foods Limited | Hospitality | 2009 |
| Interim Service & Programme Management Limited | Information & communication | 2007 |
| International Psychotherapists Ltd | Other services | 2024 |
| Interprint Documents Limited | Manufacturing | 1971 |
| Interprint Limited | Manufacturing | 2007 |
| Intrim Health Clubs Limited | Arts & recreation | 2025 |
| Ironstone Partners Ltd | Arts & recreation | 2016 |
| Isolv Limited | Information & communication | 2013 |
| IVY House Investments & Holdings Ltd | Agriculture & fishing | 2022 |
| J & K Morris Investments Limited | Financial services | 2022 |
| J and L Bradley Ltd | Construction | 2019 |
| J B Gendall Commercial Ltd | Wholesale & retail | 2016 |
| J Mora Limited | Information & communication | 2015 |
| J.L.B & Partner Ltd | Professional & scientific | 2010 |
| Jack Cooke of Leeds Ltd | Health & social care | 2019 |
| Jack's Place Limited | Real estate | 2013 |
| Jackdaw Creative Limited | Professional & scientific | 2016 |
| Jackson Property Yorkshire Ltd | Real estate | 2026 |
| Jackson Tobin Accountants Limited | Professional & scientific | 2015 |
| Jackson Whitwham Accountants LLP | | 2023 |
| James Kenny Wealth Management LLP | | 2007 |
| Jasa Enterprises Limited | Real estate | 2024 |