| H. Pharmacist Ltd | Health & social care | 2024 |
| H. Thakrar Accountancy Services Limited | Professional & scientific | 2003 |
| H.A.Y. Online Limited | Wholesale & retail | 2024 |
| H.B. Finnegan Plant Limited | Administrative & support | 2016 |
| H.B. Shoes Limited | Wholesale & retail | 2008 |
| H.C.M.S. (Oadby) Limited | Real estate | 1977 |
| H.E.L.P. Multi-Cultural Organisation Ltd | Education | 2011 |
| H.F. Welch and SON Limited | Financial services | 1963 |
| H.K. Catering Suppliers Limited | Wholesale & retail | 1990 |
| H.K. Diamonds Ltd | Administrative & support | 2017 |
| H.O.P.E Properties (Leic) Asset Management Ltd | Real estate | 2017 |
| H.O.P.E Training & Leadership C.I.C. | Education | 2024 |
| H.O.P.E. Training & Consultancy Limited | Education | 2022 |
| H.S Express Deliveries Ltd | Transport & logistics | 2019 |
| H.S. Virdee (Home Farm) Limited | Health & social care | 2009 |
| H.U.A. Halal Meat Shop Ltd | Wholesale & retail | 2015 |
| H10 Forever Young CIC | Health & social care | 2026 |
| H2 Cleaning & Property Solutions Ltd | Administrative & support | 2026 |
| H2O Utilities Limited | Other services | 1994 |
| H2PB Ltd | Professional & scientific | 2022 |
| H3 Homes UK Limited | Real estate | 2023 |
| H3MO Limited | Real estate | 2024 |
| H5 Property Ltd | Real estate | 2019 |
| H5 Renew Ltd | Wholesale & retail | 2021 |
| H5 Trading Ltd | Wholesale & retail | 2021 |
| H86 Living Limited | Real estate | 2018 |
| HA 19 Investments Limited | Real estate | 2021 |
| HA Creative Studio Limited | Professional & scientific | 2024 |
| HA Oral Care Ltd | Health & social care | 2021 |
| HA UK Holdings Ltd | Financial services | 2026 |
| HAA Couriers Ltd | Transport & logistics | 2022 |
| Haag 60 Limited | Education | 2025 |
| Haas Information Management Limited | Information & communication | 2003 |
| Haaz Motors Ltd | Wholesale & retail | 2022 |
| Habib Investment Ltd | Financial services | 2025 |
| Habiba Care Limited | Health & social care | 2019 |
| Habitpulse Ltd | Wholesale & retail | 2025 |
| Habitual Ventures Ltd | Hospitality | 2017 |
| Habsan Limited | Health & social care | 2024 |
| Habtech Consultants Limited | Information & communication | 1997 |
| Hacest UK Limited | Hospitality | 2021 |
| Hackney Hessels Ltd | Wholesale & retail | 2025 |
| Hadanova Ltd | Health & social care | 2025 |
| Haddon Costello Management Company Limited | Households | 2005 |
| Haddon Healthcare Ltd | Real estate | 2013 |
| Haden Ltd | Construction | 2024 |
| Hadenmill Limited | Hospitality | 2018 |
| Hades Monitor and Control (UK) Ltd | Administrative & support | 2016 |
| Hadfield & Alletson Limited | Construction | 2003 |
| Hadfield Haulage Ltd | Transport & logistics | 2014 |
| Hadi Leicester Limited | Hospitality | 2018 |
| Hadid Developments Limited | Real estate | 2017 |
| Haelth Ltd | Hospitality | 2022 |
| Haem Health Ltd | Health & social care | 2023 |
| Hafa Investments Ltd | Real estate | 2016 |
| Hafakand Limited | Wholesale & retail | 2023 |
| Hafeji Limited | Professional & scientific | 2011 |
| Haffyg Ltd | Professional & scientific | 2017 |
| Hafiz Estates UK Ltd | Real estate | 2022 |
| Hafiza Trading Ltd | Wholesale & retail | 2019 |
| Hafsa Investments Ltd | Real estate | 2020 |
| HAG Services Ltd | Construction | 2026 |
| Hagan (UK) Ltd | Other services | 2002 |
| Hagger Brothers Developments Limited | Real estate | 2023 |
| Hagger Developments Limited | Real estate | 2017 |
| Hagger Group Holdings Limited | Financial services | 2022 |
| Hagger Group Limited | Other services | 2016 |
| Hagi Hair Ltd | Wholesale & retail | 2025 |
| Hagi Jankey Ltd | Transport & logistics | 2020 |
| Hagimu Limited | Professional & scientific | 2021 |
| Hagley Developments Ltd | Real estate | 2025 |
| Hagley Housing CIC | Hospitality | 2025 |
| Haichenbee Ltd | Wholesale & retail | 2023 |
| Haidex Ltd | Transport & logistics | 2015 |
| Haigh Consultancy Services Limited | Information & communication | 1998 |
| Hailand Foods Ltd | Hospitality | 2024 |
| Hailfield Consultancy Ltd | Professional & scientific | 2018 |
| Hailsham Opportunities Ltd | Hospitality | 2014 |
| Hainault Haulage Ltd | Transport & logistics | 2014 |
| Haines Watts Leicester Holdings Ltd | Financial services | 2025 |
| Haines Watts Leicester Limited | Professional & scientific | 2022 |
| Hair & Graces Leicester Ltd | Wholesale & retail | 2020 |
| Hair Addiction Kirsty Nicole Ltd | Other services | 2021 |
| Hair and Beauty Training Ltd | Education | 2022 |
| Hair by JUN8 Ltd | Other services | 2023 |
| Hair by Platinum Studio Limited | Other services | 2015 |
| Hair by Shifa Ltd | Education | 2023 |
| Hair Extensions Academy Limited | Education | 2012 |
| Hair Game Ltd | Other services | 2019 |
| Hair O Limited | Professional & scientific | 2015 |
| Hair Roots Limited | Administrative & support | 2017 |
| Hair Serenity Clinic Limited | Other services | 2023 |
| Hair Solutions 1 Ltd | Other services | 2011 |
| Hair Syston Limited | Other services | 2026 |
| Hair.Ink.Clinic Ltd | Other services | 2019 |
| Hairbony Strands Ltd | Wholesale & retail | 2025 |
| Hairby Hamda Ltd | Other services | 2025 |
| Hairfields Ltd | Other services | 2023 |
| Hairquarters Leicester Limited | Other services | 2013 |
| Hairssential Ltd | Other services | 2020 |