| Hubline Logistics Ltd | Wholesale & retail | 2025 |
| Hubner Oncology Limited | Health & social care | 2013 |
| Huddle Hospitality Limited | Hospitality | 2014 |
| Hudec Limited | Information & communication | 2017 |
| Huecrib Ltd | Information & communication | 2025 |
| Huesker Limited | Manufacturing | 2003 |
| Hufc CIC | Arts & recreation | 2013 |
| Hughba Limited | Information & communication | 2023 |
| Hughes Housing Development Limited | Real estate | 2023 |
| Hughes HR Ltd | Administrative & support | 2023 |
| Hughes Randles Limited | Professional & scientific | 2023 |
| Hulahoop Consulting Ltd | Information & communication | 2018 |
| Hullberry Consulting Limited | Professional & scientific | 2018 |
| Hulme International Limited | Real estate | 2018 |
| Hulse Renovations Ltd | Construction | 2010 |
| Humanity Store Limited | Wholesale & retail | 2023 |
| Humber Doors Limited | Manufacturing | 2018 |
| Hummingbird Home Care Limited | Health & social care | 2017 |
| Hundred Percent Limited | Wholesale & retail | 2019 |
| Hunelite Ltd | Transport & logistics | 2018 |
| Hungamaa Stockton Heath Limited | Hospitality | 2024 |
| Hungarian English Cultural Society (Hecs) C.I.C. | Education | 2022 |
| Hungarian Sausage Ltd | Manufacturing | 2016 |
| Hungry HOG South West Limited | Hospitality | 2020 |
| Hunt Holding North West Limited | Construction | 2018 |
| Hunter Foods Ltd. | Hospitality | 2012 |
| Hunter Hall Ltd | Manufacturing | 2017 |
| Hunter Healey Limited | Professional & scientific | 1999 |
| Hunter Healey Probate Ltd | Professional & scientific | 2016 |
| Huntsman Communications Limited | Professional & scientific | 2013 |
| Hurst Limited | Construction | 1986 |
| Hurst Property Development Ltd | Construction | 2017 |
| Hurstpierpoint Consulting Ltd | Administrative & support | 2020 |
| Hush Solutions Ltd | Professional & scientific | 2025 |
| Hushera Limited | Manufacturing | 2026 |
| Hutchinson Commodities Ltd | Financial services | 2005 |
| Hutchinson Solutions Ltd | Administrative & support | 2024 |
| Hvac Design Company Ltd | Professional & scientific | 2009 |
| HWH Homecare Limited | Health & social care | 2016 |
| HWK Trading Ltd | Wholesale & retail | 2026 |
| Hybrid Squad Training Ltd | Arts & recreation | 2025 |
| Hybridesign Ltd | Information & communication | 2022 |
| Hydaheat Limited | Wholesale & retail | 2023 |
| Hydco Ltd | Professional & scientific | 2016 |
| Hyde CNC Services Ltd | Professional & scientific | 2023 |
| Hyde Street Properties Limited | Real estate | 1994 |
| Hyde Training Services (HTS) Ltd | Education | 2023 |
| Hydra Bathrooms Limited | Construction | 2017 |
| Hydra-Clear Process Water Ltd | Water & waste | 2015 |
| Hydraulic Attachment Services Limited | Wholesale & retail | 2014 |
| Hydrel Limited | Wholesale & retail | 2025 |
| Hydro H20 Ltd | Manufacturing | 2023 |
| Hydrogen Drinks Co Ltd | Wholesale & retail | 2024 |
| Hylomar Holdings Limited | Professional & scientific | 2017 |
| Hymus Design Limited | Administrative & support | 2013 |
| Hype Harmony Ltd | Information & communication | 2023 |
| Hyperdrive Global Ltd | Arts & recreation | 2024 |
| Hyperfocal Consulting Limited | Professional & scientific | 2012 |
| Hypers Innovation Ltd | Construction | 2025 |
| Hypha Group Limited | Professional & scientific | 2019 |
| Hypto Technologies Limited | Information & communication | 2019 |
| Hytsio Aboa Limited | Information & communication | 2014 |
| HZO Ltd | Health & social care | 2013 |
| I & K NOY Limited | Financial services | 2022 |
| I AM JOE Reeve Ltd | Other services | 2024 |
| I AM Mike Limited | Real estate | 2017 |
| I Delta UK Limited | Wholesale & retail | 2009 |
| I Design Projects Ltd | Construction | 2024 |
| I F Couriers Limited | Transport & logistics | 2003 |
| I J Mortgage Solutions Ltd | Financial services | 2025 |
| I L M Learning Limited | Administrative & support | 2012 |
| I Make Piccies Limited | Manufacturing | 2016 |
| I Matter Services CIC | Health & social care | 2025 |
| I R E Properties Ltd | Real estate | 2026 |
| I Secure (NW) Limited | Administrative & support | 2010 |
| I Shackleford Limited | Health & social care | 2013 |
| I T Property Investments Ltd | Real estate | 2023 |
| I&A Spedition Ltd | Transport & logistics | 2019 |
| I&I Dental Indemnity Limited | Financial services | 2021 |
| I-Digital Cloud Solutions Limited | Information & communication | 2022 |
| I-Immersive Limited | Information & communication | 2019 |
| I-Slide Limited | Extraterritorial | 2013 |
| I-Sourced Limited | Professional & scientific | 2022 |
| I-Supply Dental Ltd | Wholesale & retail | 2016 |
| I. K. B. Engineering Ltd | Professional & scientific | 2003 |
| I.C.C. Solutions Limited | Information & communication | 1996 |
| I2F Limited | Professional & scientific | 2021 |
| I3D Aero Systems Limited | Administrative & support | 2015 |
| Iain Black Ltd | Other services | 2019 |
| Iain Moore Rail Limited | Administrative & support | 2015 |
| IAN Anthony Estates (Property) Limited | Real estate | 2021 |
| IAN Anthony Estates (Rentals) Limited | Real estate | 2014 |
| IAN Anthony Estates (West Lancs) Limited | Real estate | 2004 |
| IAN Corrie Wealth Management Limited | Financial services | 2014 |
| IAN Crawford Property Ltd | Real estate | 2023 |
| IAN Grant Inspection Services Limited | Professional & scientific | 2013 |
| IAN Hannah Building Services Management Ltd | Administrative & support | 2024 |
| IAN Harrold Mens Hair Limited | Other services | 2008 |
| IAN J Brown Ltd | Construction | 2019 |
| IAN Lomas Funeral Support Limited | Other services | 2022 |