| Hot Pizza House Ltd | Hospitality | 2024 |
| Hot Tubs 4 Less Ltd | Wholesale & retail | 2024 |
| Hotel NET Zero Limited | Professional & scientific | 2021 |
| Houdini's Re-Pointing Services. Limited | Households | 2022 |
| Hough Property Limited | Real estate | 2020 |
| House & Garden Crew Limited | Other services | 2025 |
| House Mouse Solutions Offshore Limited | Extraterritorial | 2013 |
| House of Sakura Limited | Wholesale & retail | 2024 |
| House Plan Drawing Services (Hpds) Limited | Professional & scientific | 2006 |
| Hovashafi Limited | Health & social care | 2020 |
| Howard J Wroot Limited | Administrative & support | 2008 |
| HS 21 Barbers Limited | Other services | 2023 |
| HSM Management Ltd | Real estate | 2024 |
| Hsos Industrial Services Limited | Construction | 2015 |
| Hstk Properties Ltd | Real estate | 2018 |
| HTP Property Investment Ltd | Real estate | 2026 |
| Hub SBP Ltd | Hospitality | 2024 |
| Hubbgroup Holdings Limited | Financial services | 2021 |
| Hubbvic Holdings Limited | Construction | 2026 |
| Huber Trading Ltd | Education | 2020 |
| Huda Enterprise Ltd | Health & social care | 2026 |
| Hughes Joinery Projects Ltd | Construction | 2023 |
| Hugo Rybok Ltd | Transport & logistics | 2025 |
| Hull Heart Limited | Health & social care | 2021 |
| Hull Store 1 Ltd | Wholesale & retail | 2026 |
| Humber Airsoft Ltd | Arts & recreation | 2013 |
| Humber Heating Services Limited | Construction | 2014 |
| Humber Merchants Limited | Wholesale & retail | 1972 |
| Humber Technical Services Limited | Professional & scientific | 2012 |
| Humberside Glazing Holdings Limited | Professional & scientific | 2018 |
| Humberside Glazing Limited | Construction | 1998 |
| Humberside Lifting Services Ltd | Construction | 2010 |
| Humberside Marketing Solutions Ltd | Health & social care | 2024 |
| Humberside Motors Ltd | Wholesale & retail | 2022 |
| Humberside Urology Limited | Health & social care | 2020 |
| Humberwood Limited | Wholesale & retail | 2021 |
| Humble Ventures Limited | Information & communication | 2023 |
| Hunt Group Limited | Professional & scientific | 1982 |
| Hunt Leisure Limited | Hospitality | 2022 |
| Hunt-Ir Ltd | Information & communication | 2025 |
| Huntingdon Medical Consultancy Ltd | Health & social care | 2019 |
| Hurricane Events Ltd | Other services | 2024 |
| Huscarl Commercial Finance Limited | Financial services | 2026 |
| Hutleys Garage and Vehicle Transport Ltd | Wholesale & retail | 2022 |
| Hvibe Ltd | Transport & logistics | 2025 |
| Hwnar Ltd | Wholesale & retail | 2026 |
| Hydroprocessing Associates Europe Ltd | Extraterritorial | 2009 |
| Hydrovia Systems Ltd | Professional & scientific | 2026 |
| Hyfield Farming Limited | Agriculture & fishing | 2024 |
| Hyperion Robotics UK Ltd | Manufacturing | 2024 |
| Hypnotherapy Equipment UK Ltd | Manufacturing | 1999 |
| I-Tech Geeks Ltd | Information & communication | 2014 |
| I.Crabb Solutions Ltd | Construction | 2025 |
| Iain Anderson Heating Limited | Construction | 2009 |
| Iain Cameron Surgery Ltd | Health & social care | 2009 |
| Ian's New York Deli Limited | Hospitality | 2023 |
| IAS Rheumatology Limited | Health & social care | 2025 |
| Iatrosyne Ltd | Health & social care | 2024 |
| ICC Consulting Limited | Health & social care | 2026 |
| Ideal Garage Door Company Limited | Professional & scientific | 2010 |
| Ideal KG Limited | Real estate | 2019 |
| IE Rope Access Ltd | Construction | 2025 |
| IGS North Limited | Construction | 2013 |
| Iholo Buildtech Ltd | Information & communication | 2025 |
| IJ Engineering Ltd | Professional & scientific | 2022 |
| Ilias Ltd | Transport & logistics | 2026 |
| Ilie Transport Ltd | Transport & logistics | 2021 |
| Imperial Restaurant A&B Ltd | Hospitality | 2022 |
| Imperium Online Trading Ltd. | Wholesale & retail | 2017 |
| Impexstar Limited | Transport & logistics | 2018 |
| IMT Medical Transport Limited | Transport & logistics | 2017 |
| In-Export Limited | Wholesale & retail | 2017 |
| Inchynet Ltd | Professional & scientific | 2022 |
| Independent Asset Holdings Limited | Financial services | 2021 |
| Independent Property Surveyors Limited | Professional & scientific | 2018 |
| Independent Psychiatrist Group Limited | Health & social care | 2017 |
| Indiething Ltd | Information & communication | 2013 |
| Indigo Cycles Ltd | Wholesale & retail | 2023 |
| Industrial Services Ltd | Manufacturing | 2020 |
| Industrial Units Limited | Real estate | 2025 |
| Infolead Ltd | Administrative & support | 2025 |
| ING Distribution Ltd | Transport & logistics | 2022 |
| Inglewood Caravans Ltd | Extraterritorial | 2021 |
| Inglis Anaesthesia Limited | Health & social care | 2024 |
| Innovex Facilities & Property Services Limited | Construction | 2023 |
| Innovex Washroom Specialists Limited | Construction | 2023 |
| INO Property Ltd | Real estate | 2024 |
| Inspirations Personalised Support Services Limited | Health & social care | 2025 |
| Inspired Leisure Limited | Hospitality | 2018 |
| Inspiring Family Solutions Community Interest Company | Administrative & support | 2018 |
| Inspiring Trends Ltd | Wholesale & retail | 2024 |
| Inspirit Carrey Bidco Limited | Financial services | 2022 |
| Instant Asset Management Ltd | Construction | 2021 |
| Intake Cutting & Drilling Limited | Manufacturing | 2014 |
| Intake Shot Blasting & Painting Limited | Construction | 2014 |
| Intake Transport Limited | Transport & logistics | 1995 |
| Intech Environmental Holdings Ltd | Professional & scientific | 2016 |
| Intech Environmental Limited | Administrative & support | 1995 |
| Integrated Highway Services Limited | Construction | 2019 |
| Integration Centre Limited | Health & social care | 2026 |