| Group a Fabrication Ltd | Manufacturing | 2023 |
| Growth ID Ltd | Professional & scientific | 2025 |
| Grundstenen Limited | Other services | 2009 |
| Grupo Antolin Leamington Limited | Manufacturing | 1997 |
| GSB Construction Ltd | Construction | 2019 |
| GSB One Services Limited | Real estate | 2021 |
| Gsga Developments Ltd | Real estate | 2020 |
| GSN Estates Limited | Construction | 2024 |
| GSN Residences Limited | Construction | 2024 |
| Gtdr Ltd | Wholesale & retail | 2025 |
| GTM Talent Limited | Administrative & support | 2026 |
| Guerilla Cast Limited | Manufacturing | 2012 |
| Gumleaf Outdoor Limited | Administrative & support | 2019 |
| Gurj Houses Ltd | Real estate | 2019 |
| Guthix Limited | Professional & scientific | 2025 |
| Guthrie Douglas Limited | Manufacturing | 2010 |
| Guy's Cliffe Masonic Properties Limited | Real estate | 1983 |
| Guy's Cliffe Masonic Rooms Limited | Extraterritorial | 1983 |
| Guy's Cliffe Walled Garden Trust Limited | Agriculture & fishing | 2012 |
| GXP Telecom Services Limited | Information & communication | 2020 |
| Gynaecology Medical Services Ltd | Health & social care | 2021 |
| H J Medical Limited | Health & social care | 2015 |
| H K (Holdings) Limited | Professional & scientific | 2009 |
| H K Laser Services Limited | Manufacturing | 2009 |
| H K Technologies Limited | Manufacturing | 2003 |
| H M Carpentry & Build Limited | Manufacturing | 2019 |
| H W Clark Ltd | Professional & scientific | 2024 |
| H.R. Property Investments Ltd | Real estate | 2018 |
| H20 Products Limited | Manufacturing | 2002 |
| H2YDROGEN Ltd | Energy | 2023 |
| H7 Consultancy Ltd | Information & communication | 2023 |
| Hahn & Kolb (Great Britain) Limited | Other services | 1994 |
| Hair at Hatton Limited | Other services | 2018 |
| Halcyon Power Services Ltd | Construction | 2026 |
| Hall Capital Limited | Real estate | 2020 |
| Halo Appliances Ltd | Manufacturing | 2018 |
| Halo Expo Ltd | Transport & logistics | 2017 |
| Halspica Limited | Other services | 2015 |
| Hamilton Bailey (Medical Works) Limited | Information & communication | 1960 |
| Hamilton Carpets and Flooring Limited | Construction | 2025 |
| Hamilton Contract Services Ltd | Construction | 2007 |
| Hamilton Flooring Services Limited | Construction | 2016 |
| Hamlingtons Lifestyle Limited | Wholesale & retail | 2022 |
| Hamman Agricultural and Pharmaceutical Services (Presteigne) Limited | Wholesale & retail | 1965 |
| Hammer Transport (Oxon) Limited | Transport & logistics | 2019 |
| Hampton Crest Group Ltd | Financial services | 2026 |
| Hampton Crest Living Ltd | Administrative & support | 2026 |
| Hampton Magna Electrical Ltd | Construction | 2026 |
| Hancon Ltd | Wholesale & retail | 2023 |
| Hand Picked Developments Limited | Extraterritorial | 2013 |
| Hands Away Limited | Information & communication | 2016 |
| Handy Tours Limited | Administrative & support | 2025 |
| Handyvan Leamington Spa Ltd | Transport & logistics | 2019 |
| Hannah Layton Management Limited | Arts & recreation | 2015 |
| Hanow Ltd | Professional & scientific | 2012 |
| Hansgrohe Limited | Wholesale & retail | 1990 |
| Hanson Textiles Limited | Manufacturing | 2020 |
| Happy Idiot Clothing Ltd | Wholesale & retail | 2024 |
| Happy Property Investments Ltd | Real estate | 2025 |
| Happy Puccia Ltd | Hospitality | 2018 |
| Happy Puccia on the Road Ltd | Hospitality | 2021 |
| Happy Village Food Products Limited | Wholesale & retail | 2009 |
| Happysignals UK Ltd | Information & communication | 2019 |
| Hara Vara Property Ltd | Real estate | 2022 |
| Harborne House Limited | Other services | 2020 |
| Harborough Property | Real estate | 2021 |
| Harbury (Holdings) Limited | Financial services | 2013 |
| Hardy Performance Limited | Other services | 2024 |
| Hari & Asokan Ltd | Wholesale & retail | 2021 |
| Haringtons Group Holdings Ltd | Financial services | 2025 |
| Haringtons Holdings Ltd | Financial services | 2021 |
| Haringtons UK Limited | Administrative & support | 2003 |
| Hark Property Investments Ltd | Real estate | 2020 |
| Harkad Limited | Professional & scientific | 2023 |
| Harlequin Partnerships Ltd | Financial services | 2023 |
| Harlequin Projects Ltd | Construction | 2021 |
| Harris Acquire Holdings Ltd | Financial services | 2025 |
| Harris Acquire Ltd | Professional & scientific | 2024 |
| Harryarthursupplies Ltd | Wholesale & retail | 2025 |
| Hart Consulting Limited | Administrative & support | 1999 |
| Hart Contracting Solutions Limited | Real estate | 2020 |
| Hartleyites Sports Club UK | Education | 2020 |
| Harvest of Arden Foods Limited | Hospitality | 2007 |
| Harvey-Thompson Limited | Other services | 2012 |
| Haseley Coach House Limited | Hospitality | 2015 |
| Haseley Court Management Company Limited | Households | 2000 |
| HAT & CAP Works Limited | Construction | 2021 |
| Hattie's Adventure Book Ltd | Wholesale & retail | 2020 |
| Hatton Children's Nursery Limited | Education | 2018 |
| Hatton Escape LLP | | 2019 |
| Hatton Heating Ltd | Construction | 2017 |
| Hatton PA Ltd | Administrative & support | 2025 |
| Hatton Park NO. 1 Management Company Limited | Households | 1998 |
| Hatton Ventures (UK) Limited | Professional & scientific | 2019 |
| Hatton Wyatt Disc Golf Ltd | Arts & recreation | 2016 |
| Haus Design & Build Ltd | Construction | 2024 |
| Hawe Hydraulik UK Ltd. | Wholesale & retail | 2025 |
| Hawk Midlands Property Ltd | Real estate | 2026 |
| Hawk Scaffolding Midlands Limited | Construction | 2020 |
| Hawkins Aviation Limited | Education | 2016 |