| Grove Holdco 2 Limited | Financial services | 2022 |
| Grove Holdco 3 Limited | Financial services | 2022 |
| Grovebury Automotive Limited | Wholesale & retail | 2024 |
| Growth Consulting Solutions Ltd | Professional & scientific | 2023 |
| Grzegorz Harbar Limited | Administrative & support | 2022 |
| GS Driving Limited | Transport & logistics | 2025 |
| GS Interior Fit OUT & Drylining Limited | Construction | 2026 |
| GS Print Management LLP | | 2012 |
| GSA Construction Limited | Construction | 2016 |
| GT Professional Products Ltd | Professional & scientific | 2022 |
| GT Silver Limited | Professional & scientific | 2022 |
| Gtech Detailing Ltd | Wholesale & retail | 2022 |
| Guideline Corporation Limited | Professional & scientific | 1996 |
| Guiding Light Support Services Ltd | Public administration | 2025 |
| Guiver Wright's Engineering Ltd | Manufacturing | 2025 |
| Gundayi Limited | Public administration | 2026 |
| Gunners Cocktails Limited | Wholesale & retail | 2016 |
| Gunroom Media Limited | Arts & recreation | 2006 |
| GUS Car Ltd | Wholesale & retail | 2018 |
| Gustav Limited | Transport & logistics | 2021 |
| GUY Angel Consultancy Ltd | Professional & scientific | 2024 |
| Guzek Venture & Properties Ltd | Real estate | 2018 |
| GUZU84 Garage Ltd | Manufacturing | 2016 |
| GUZU84 MOT Centre Ltd | Wholesale & retail | 2025 |
| GW Trading Limited | Manufacturing | 2006 |
| Gym Fille Limited | Wholesale & retail | 2025 |
| GYS Consultancy Ltd | Wholesale & retail | 2019 |
| GYS Property Investments Ltd | Real estate | 2026 |
| GZ Engineering Ltd | Construction | 2025 |
| H L & D Mechanics Ltd | Wholesale & retail | 2018 |
| H&A Property Rentals Limited | Real estate | 2024 |
| H&S Holdings Limited | Financial services | 2015 |
| Haddon Power Services Ltd | Construction | 2018 |
| Hadena Care Ltd | Health & social care | 2024 |
| Haellro Rail Systems Consulting Limited | Other services | 2018 |
| Hair Geeks Limited | Wholesale & retail | 2012 |
| Hair of the Dog Grooming Bar Ltd | Other services | 2026 |
| Hairtapp Ltd | Information & communication | 2017 |
| Hajl Services Ltd | Health & social care | 2025 |
| Halalaura Ltd | Wholesale & retail | 2026 |
| Hale ITS Limited | Administrative & support | 2017 |
| Hallie's Legacy CIC | Wholesale & retail | 2023 |
| Halo Locks Ltd | Other services | 2003 |
| Hammer & Skill Ltd | Construction | 2026 |
| Hammer Time Auctions Limited | Wholesale & retail | 2019 |
| Hampstead Holdings Ltd | Real estate | 2025 |
| Hararat Ltd | Real estate | 2016 |
| Harley's Furrytail Beautique Limited | Other services | 2019 |
| Harmony Haven Ltd | Health & social care | 2023 |
| Harmony Path Limited | Wholesale & retail | 2025 |
| Harmony Supported Living Services Ltd | Health & social care | 2023 |
| Harnorth Ltd | Professional & scientific | 2023 |
| Harp Infrastructure Management Limited | Other services | 2022 |
| Harpers Brook Commercial Limited | Construction | 2022 |
| Harris Land Management (2) Limited | Real estate | 2019 |
| Harris Land Management (Evesham) Limited | Construction | 2019 |
| Harris Land Management (Forest East) Limited | Construction | 2020 |
| Harris Land Management Limited | Construction | 2018 |
| Harrison Developments Rutland Ltd | Construction | 2007 |
| Hartmel Limited | Professional & scientific | 2010 |
| Harundaglar Limited | Wholesale & retail | 2025 |
| Haryl (1991) Limited | Hospitality | 1989 |
| Hatton Stays Limited | Real estate | 2023 |
| Haulage FS Ltd | Manufacturing | 2020 |
| Havana Store Ltd | Wholesale & retail | 2023 |
| Hayward UK Investment Holdings Limited | Administrative & support | 2026 |
| HBC Group Limited | Construction | 2024 |
| HCV Autogroup Ltd | Wholesale & retail | 2025 |
| HD Media C.I.C. | Information & communication | 2014 |
| Headlands Consultancy Limited | Administrative & support | 2014 |
| Headway Business Park Management Company Limited | Households | 2008 |
| Heanyville Property Investment Ltd | Construction | 2023 |
| Hearthaven Limited | Health & social care | 2019 |
| Heavy Truth Music Publishing Limited | Information & communication | 2001 |
| Heff MX Limited | Extraterritorial | 2025 |
| Heholm Ltd | Administrative & support | 2025 |
| Helier Benn & Company Limited | Professional & scientific | 2010 |
| Helmeon Ltd | Professional & scientific | 2026 |
| Helpmates Limited | Wholesale & retail | 2006 |
| Hemogad Technologies Limited | Professional & scientific | 2016 |
| Hendela Property Holdings Limited | Real estate | 2026 |
| Henry James Mortgages Ltd | Financial services | 2019 |
| Hepz Ltd | Wholesale & retail | 2025 |
| Herald Commercial Properties Limited | Real estate | 2024 |
| Herald Packaging Limited | Manufacturing | 1997 |
| Herald Property Investments Limited | Real estate | 2017 |
| Heritage Consulting Limited | Extraterritorial | 2017 |
| High One Transport Limited | Transport & logistics | 2022 |
| High Street Bakery (Property) Limited | Real estate | 2015 |
| High Street Bakery Limited | Manufacturing | 2007 |
| High Vistas Ltd | Real estate | 2024 |
| Higham Limited | Other services | 2024 |
| Higham Refrigeration Limited | Manufacturing | 2024 |
| Hightrack Company Limited | Real estate | 1948 |
| Hill Management Services Ltd | Professional & scientific | 2024 |
| Hillcrest Safety Consultants Ltd | Professional & scientific | 2022 |
| Hillcroft House Research Hub Community Interest Company | Professional & scientific | 2006 |
| Hils Developments Limited | Construction | 2005 |
| Hirelytics Limited | Administrative & support | 2025 |
| Hirestock Limited | Administrative & support | 2020 |