| HI Spec Solutions Limited | Construction | 2013 |
| HI Spec Solutions NW Limited | Construction | 2023 |
| High Bar Limited | Construction | 2020 |
| High Peak Commercials Limited | Wholesale & retail | 2013 |
| High Peak Workwear Ltd | Manufacturing | 2026 |
| Hike Services Limited | Transport & logistics | 2020 |
| Hill Biscuits Limited | Manufacturing | 1906 |
| Hill Top Early Learning Provision Ltd | Education | 2003 |
| Hills Construction Northwest Limited | Construction | 2020 |
| Hillstar Enterprises Limited | Wholesale & retail | 2015 |
| Hing WAH Mossley Ltd | Hospitality | 2020 |
| Hirsty Ltd | Real estate | 2019 |
| Hisway Limited | Real estate | 2026 |
| Hive Entertainment Limited | Wholesale & retail | 2016 |
| HKD Building Limited | Professional & scientific | 2013 |
| Hlesibanda Ltd | Health & social care | 2016 |
| Holts Capital Investors Limited | Financial services | 2024 |
| Holzinn Constructions Ltd | Construction | 2025 |
| Holzinn Homes Ltd | Construction | 2024 |
| Holzinn Orient Investments Ltd | Construction | 2025 |
| Home and DRY Solutions Ltd | Construction | 2021 |
| Home Care Dental Ltd | Health & social care | 2014 |
| Home Grown Independence Ltd | Public administration | 2023 |
| Homes for Life Limited | Real estate | 2012 |
| Homeshine Cleaning Company Ltd. | Administrative & support | 2015 |
| Honeysuckle Property Management Limited | Real estate | 1999 |
| Hoof & Harvest Ltd | Agriculture & fishing | 2025 |
| Hoole Bank Day Nursery Limited | Education | 1997 |
| Hoong Shing Limited | Hospitality | 2025 |
| Hopkinson Estates Ltd | Real estate | 2024 |
| Hot Yoganic 40 Ltd | Arts & recreation | 2015 |
| House of Venus Ltd | Other services | 2025 |
| Housing Disrepair Hub Ltd | Financial services | 2026 |
| Howard Bernstein Solicitors Ltd. | Professional & scientific | 2009 |
| Howards Place Apartments Ltd | Households | 2022 |
| Howarth Roofing Services Ltd | Construction | 2026 |
| HPS Hamilton Professional Services Ltd | Professional & scientific | 2023 |
| HRD Homes Ltd. | Real estate | 2017 |
| HRJ Wind Services Limited | Wholesale & retail | 2022 |
| HS 786 Limited | Wholesale & retail | 2023 |
| HSE Shield Ltd | Construction | 2022 |
| Huda Nails Ltd | Wholesale & retail | 2025 |
| Hullock Homes Limited | Real estate | 2026 |
| Humanity Drive Ltd | Other services | 2025 |
| Hurley (Civil Engineering) Limited | | 1969 |
| Hurricane Freight Limited | Transport & logistics | 2019 |
| Hurst Cross Service Station Limited | Wholesale & retail | 2005 |
| Hurst Cross Tandoori Ltd. | Hospitality | 2024 |
| HW Styling Ltd | Professional & scientific | 2020 |
| HY Healthcare Solutions Ltd | Information & communication | 2025 |
| Hybrid Solutions MCR Ltd | Wholesale & retail | 2024 |
| Hybridtech Alliance Ltd | Professional & scientific | 2022 |
| Hydrocarbon Engineering Services Ltd | Construction | 2026 |
| Hyped Soles Ltd | Wholesale & retail | 2025 |
| Hypedexclusives Ltd | Wholesale & retail | 2025 |
| Hysa Formwork and Stone Ltd | Construction | 2022 |
| I Love Sushi World Ltd | Hospitality | 2024 |
| I&S Patel Limited | Real estate | 2014 |
| I3S-INNOVATIVE Specialized Security Services Ltd | Professional & scientific | 2024 |
| I4CNC Limited | Professional & scientific | 2020 |
| IA Cosmo Ltd | Wholesale & retail | 2025 |
| IAM Potato Ltd | Wholesale & retail | 2026 |
| Iazi Limited | Professional & scientific | 2024 |
| Ibc's Holdings (UK) Ltd | Professional & scientific | 2010 |
| Ibreez Collections Ltd | Wholesale & retail | 2023 |
| IC Telecom Networks Limited | Information & communication | 2019 |
| Icladd Installation Ltd | Construction | 2018 |
| Idara Noor UL Islam CIC | Other services | 2025 |
| Ideal Boats Company Ltd | Manufacturing | 2006 |
| Iftikhar Travel Agency Ltd | Administrative & support | 2024 |
| Iguana Group Ltd | Financial services | 2021 |
| Iguana Resource Ltd | Administrative & support | 2021 |
| Ihstherma Ltd | Construction | 2025 |
| IK Decorating Solution Ltd | Construction | 2026 |
| Ilashhq Ltd | Other services | 2023 |
| Image Flooring Contractors Ltd | Construction | 2017 |
| Image Floors Contracts Limited | Professional & scientific | 2012 |
| IMD Martial Arts Ltd | Arts & recreation | 2025 |
| Immyz Ltd | Wholesale & retail | 2020 |
| Imnash Limited | Health & social care | 2020 |
| Impact Sign & Print Ltd | Manufacturing | 2017 |
| Imperial Cutting Formes Limited | Administrative & support | 1986 |
| Imperial Oven Cleaning Services Ltd | Administrative & support | 2021 |
| IN Petroleum Ltd | Wholesale & retail | 2018 |
| IN Realtors Ltd | Administrative & support | 2023 |
| IN the Spirit CIC | Agriculture & fishing | 2025 |
| In-Signs Limited | Administrative & support | 2005 |
| Independent Label Group Holdings Ltd | Wholesale & retail | 2024 |
| Indigo Forecourts Ltd | Construction | 2006 |
| Indigo Logistic Services Ltd | Transport & logistics | 2016 |
| Induction Works Ltd | Professional & scientific | 2018 |
| Industrial Software Systems Limited | Information & communication | 2012 |
| Industrial Space Solutions Limited | Professional & scientific | 2007 |
| Infini Insights Ltd | Professional & scientific | 2025 |
| Infinite Aesthetics Ltd | Health & social care | 2024 |
| Infinity Coffee Grill Ltd | Wholesale & retail | 2024 |
| Infinity Global Telecom Ltd | Information & communication | 2017 |
| Infinity Windows Limited | Manufacturing | 2017 |
| Infonexa Consulting Ltd | Information & communication | 2026 |
| Injectituk Limited | Other services | 2022 |