| H&H Private Ltd | Other services | 2017 |
| H&H Zahra Limited | Wholesale & retail | 2025 |
| H&K Fish Bar Ltd | Hospitality | 2026 |
| H&L Properties (Bolton) Ltd | Real estate | 2024 |
| H&M Empire Limited | Wholesale & retail | 2019 |
| H&M News (Widnes) Ltd | Wholesale & retail | 2023 |
| H&N Lettings Ltd | Real estate | 2025 |
| H&R Furniture and Appliance Shop Limited | Wholesale & retail | 2026 |
| H-T Delivery Services Limited | Wholesale & retail | 2022 |
| H. Charlesworth & Co Limited | Manufacturing | 1973 |
| H. R. Entertainment Limited | Administrative & support | 2003 |
| H.&H.Pipework Limited | Manufacturing | 2014 |
| H.A Optics Ltd | Wholesale & retail | 2022 |
| H.A. England (Properties) Limited | Real estate | 2008 |
| H.B.M.S. Limited | Manufacturing | 1999 |
| H.Davison & Sons | Professional & scientific | 1910 |
| H.E.E's Traditional Sweets Ltd | Wholesale & retail | 2020 |
| H.E.S. Enterprises Limited | Wholesale & retail | 1998 |
| H.N. Espley & Sons Limited | Wholesale & retail | 1978 |
| H.Samson(Bolton)Limited | Wholesale & retail | 1960 |
| H1 Group Ltd | Construction | 2025 |
| H10 Agency Limited | Information & communication | 2016 |
| H15 Estates Limited | Real estate | 2021 |
| H2 Flow Ltd | Construction | 2024 |
| H2 Tanning Ltd | Other services | 2022 |
| H20 Hairdressing NW Limited | Other services | 2023 |
| H20 Remedial Services Limited | Construction | 2009 |
| H2H Medics UK Ltd | Administrative & support | 2025 |
| H3 Construct Ltd | Construction | 2019 |
| H3 Healthcare Ltd | Health & social care | 2025 |
| H3I Trading Ltd | Wholesale & retail | 2023 |
| H3U Limited | Wholesale & retail | 2024 |
| H6 Marketing and Design Limited | Professional & scientific | 2023 |
| HA Auto Services Ltd | Wholesale & retail | 2024 |
| HA Finance Limited | Real estate | 2016 |
| HA HA Catering Ltd | Hospitality | 2019 |
| Haadimotorgroup Ltd | Wholesale & retail | 2023 |
| Haamut Electrical Service Limited | Construction | 2023 |
| Haan Construction Ltd | Construction | 2025 |
| Habeebi Holdings Ltd | Financial services | 2025 |
| Habib Films Ltd | Information & communication | 2022 |
| Habitable Homes Limited | Real estate | 2018 |
| Habitat Furniture Limited | Wholesale & retail | 2024 |
| Habitus Systems Ltd | Professional & scientific | 2026 |
| Hacienda Capital Limited | Real estate | 2020 |
| Hacienda Capital Management Limited | Real estate | 2021 |
| Hackett Design-Fit-Maintain Limited | Administrative & support | 2021 |
| Hackin Limited | Professional & scientific | 2015 |
| Hacking Limited | Information & communication | 2018 |
| HAD Technologies Ltd | Information & communication | 2024 |
| Hadean Landscape & Planning Ltd | Professional & scientific | 2024 |
| Hadithclo Ltd | Wholesale & retail | 2025 |
| Hadizamalikcare Services Limited | Health & social care | 2025 |
| Hadlee Bidco Limited | Administrative & support | 2019 |
| Hadlee Midco Limited | Administrative & support | 2019 |
| Hadrada Consulting Ltd | Professional & scientific | 2023 |
| Haematology Consultant Manchester Limited | Health & social care | 2015 |
| Hafa Design Studio Ltd | Professional & scientific | 2021 |
| Hafejee Limited | Professional & scientific | 2024 |
| Hafeji Properties Ltd | Real estate | 2025 |
| Hafh Associates Limited | Professional & scientific | 2025 |
| Hafiz Waheed Limited | Health & social care | 2016 |
| Hafsaz Limited | Administrative & support | 2026 |
| Hafway | Other services | 2010 |
| Hafzar Site Limited | Manufacturing | 2019 |
| HAH Advocates Ltd | Professional & scientific | 2022 |
| HAH Portfolio Ltd | Real estate | 2021 |
| HAI Trading Ltd | Wholesale & retail | 2020 |
| Haico Ltd | Manufacturing | 2019 |
| Haighton 105 Consultants Ltd | Professional & scientific | 2024 |
| Hair & Beauty Lounge by J Ltd | Other services | 2024 |
| Hair and Beauty Se.Rene Ltd | Other services | 2024 |
| Hair by Alison Ltd | Other services | 2014 |
| Hair by Laura Ltd | Other services | 2017 |
| Hair by Rachel Elizabeth Ltd | Other services | 2014 |
| Hair Loss Solutions Ltd | Other services | 2022 |
| Hair Masters Bolton Ltd | Other services | 2026 |
| Hair of the Dog Salon Limited | Other services | 2010 |
| Hair to Help International Limited | Other services | 2024 |
| Hairology (NW) Ltd | Other services | 2015 |
| Hairology Hair Loss Clinic Ltd | Administrative & support | 2017 |
| Hairology Training Academy Limited | Education | 2020 |
| Hairplexion Ltd | Other services | 2024 |
| Hairy Monsters Parties Ltd | Arts & recreation | 2018 |
| Hairy Worm Limited | Wholesale & retail | 2012 |
| Haitchco Ltd | Wholesale & retail | 2024 |
| Hajifooduk Limited | Hospitality | 2025 |
| Hajis Pizza & Grill Ltd | Hospitality | 2020 |
| Hajjvery Traders Ltd. | Wholesale & retail | 2019 |
| Hajran Linen Ltd | Wholesale & retail | 2018 |
| HAK Events Ltd | Arts & recreation | 2025 |
| HAK Locum Limited | Health & social care | 2023 |
| HAK Pharma Limited | Health & social care | 2024 |
| Haket Studios Limited | Information & communication | 2025 |
| Hakh.Bargains Ltd | Wholesale & retail | 2023 |
| Hakmo Group Ltd | Financial services | 2024 |
| Hakuna Matata Services Ltd | Construction | 2022 |
| Halal Debt Solutions Ltd | Professional & scientific | 2025 |
| Halal Food Gastronomy Ltd | Information & communication | 2019 |
| Halbro Property Holdings Limited | Professional & scientific | 2012 |