| Generation Music Limited | Manufacturing | 2005 |
| German Contract Services Limited | Water & waste | 2001 |
| GET WET Swim Scheme Limited | Arts & recreation | 2010 |
| Getlet Ltd | Real estate | 2025 |
| Gezellig Luxury Holiday Accomodation Ltd | Real estate | 2022 |
| GG Accommodation Ltd | Hospitality | 2025 |
| Gill Martinez Limited | Manufacturing | 2013 |
| Gillhams Deli Limited | Hospitality | 2016 |
| GKR Parts Limited | Wholesale & retail | 2020 |
| GKR Performance Ltd | Wholesale & retail | 2018 |
| Glaine Limited | Financial services | 2014 |
| Glenve Limited | Hospitality | 2025 |
| Global Lifestyle Services Ltd | Arts & recreation | 2022 |
| Globestock Holdings Limited | Financial services | 2018 |
| Globestock Limited | Manufacturing | 1982 |
| Glover & Associates Limited | Agriculture & fishing | 2013 |
| GLT Holdings Ltd | Real estate | 2019 |
| Go Butler Ltd | Transport & logistics | 2023 |
| Gobowen Autocare Limited | Wholesale & retail | 2012 |
| Golf Course Investment Limited | Arts & recreation | 2017 |
| Gracious Catering Limited | Hospitality | 2019 |
| Graham Griffiths Builders Limited | Construction | 2015 |
| Grand Salix Limited | Professional & scientific | 2023 |
| GRC Electrical Solutions Ltd | Extraterritorial | 2021 |
| Green 6 Construction Solutions Limited | Construction | 2016 |
| Greener Times Media Limited | Information & communication | 2016 |
| Greenfields Energy Ltd | Professional & scientific | 2010 |
| Greenwood Tax and Accounting Ltd | Professional & scientific | 2016 |
| Greymoat Limited | Real estate | 1999 |
| Griffiths Hire Shops Holdings Limited | Wholesale & retail | 2019 |
| Griffiths Hire Shops Limited | Wholesale & retail | 1993 |
| Grindley & Roberts Limited | Wholesale & retail | 2014 |
| Grindley Potter Limited | Professional & scientific | 2008 |
| Groovy Events Ltd | Extraterritorial | 2024 |
| Grouchbag Limited | Manufacturing | 2015 |
| Groundward Limited | Extraterritorial | 2014 |
| Guard & Guide Ltd | Education | 2026 |
| Guardian Safer Services Ltd | Health & social care | 2025 |
| Gunn Structural Engineering Ltd | Professional & scientific | 2022 |
| Gurevitch Limited | Extraterritorial | 2013 |
| Guttercrest (GB) Limited | Real estate | 2004 |
| Guttercrest Limited | Manufacturing | 1987 |
| Guyzance Hall Limited | Real estate | 2007 |
| GW Metrology Services Ltd. | Professional & scientific | 2009 |
| Gwalia Connect Limited | Information & communication | 2025 |
| Gwel Y Mynydd Management Ltd. | Administrative & support | 2004 |
| GWR Fasteners Limited | Wholesale & retail | 2012 |
| GWR Precision Limited | Manufacturing | 2012 |
| H & M Equestrian Limited | Arts & recreation | 2018 |
| H2O Deionised Limited | Manufacturing | 2020 |
| Hadto Ltd | Real estate | 2024 |
| Halfburly Limited | Professional & scientific | 1988 |
| Hallarrow Limited | Households | 1984 |
| Halo Plastics Ltd | Manufacturing | 2019 |
| Halston Sporting Limited | Arts & recreation | 2020 |
| Hamlet Property Company (Shropshire) Limited | Real estate | 2005 |
| Hampton Heritage Design & Consultancy Ltd | Professional & scientific | 2020 |
| Harding Tile Supplies Ltd | Construction | 2017 |
| Harris Learning Solutions Ltd | Education | 2025 |
| Hawthorns Estate Management Company Limited | Households | 2002 |
| Hayward Building Company Limited | Construction | 2023 |
| HB Family Holdings Ltd | Financial services | 2023 |
| HB Properties Holding Ltd | Real estate | 2023 |
| HBD Holdings Ltd | Financial services | 2024 |
| HC Enterprises Ltd | Construction | 2019 |
| Heading for the Coast LLP | | 2015 |
| Health@Theohc Limited | Health & social care | 2011 |
| Heat Home Components Limited | Construction | 2024 |
| Heating Economy Limited | Manufacturing | 2005 |
| Heli Charter Services Ltd | Financial services | 2021 |
| Helmeth and Lawley Limited | Construction | 2019 |
| Help ME Succeed Ltd | Professional & scientific | 2023 |
| Hendricks Hound Ltd | Professional & scientific | 2021 |
| Henley Manor Management Company Limited | Households | 2020 |
| Henlle Hall Holidays Limited | Hospitality | 2013 |
| Henlle Hall Holidays Resources Limited | Administrative & support | 2013 |
| Henlle Management Company Limited | Households | 2019 |
| Henry Martin Property Management Limited | Real estate | 2019 |
| Henstent Holiday Park Limited | Hospitality | 2024 |
| Henstone Distillery Limited | Manufacturing | 2015 |
| Heritage Secured Funding Limited | Financial services | 2002 |
| Hermon Arts Ltd | Arts & recreation | 2025 |
| HFC Suffolk Limited | Wholesale & retail | 2017 |
| Hickman Hospitality Limited | Hospitality | 2024 |
| Hidden Firs Ltd | Extraterritorial | 2024 |
| Higgins Accessible Transport Limited | Transport & logistics | 2015 |
| Higginson's Equine Assisted Learning Ltd | Other services | 2024 |
| Highbury Poultry Farm Produce Limited | Manufacturing | 1975 |
| Highbury Poultry Limited | Wholesale & retail | 2012 |
| Highland Commercials Limited | Agriculture & fishing | 2004 |
| Hindford Holdings Limited | Real estate | 2024 |
| Hinton Payne Plumbing & Heating Ltd | Construction | 2024 |
| Hintonpayne Ltd | Construction | 2016 |
| Historic Rallysport Limited | Wholesale & retail | 2018 |
| HJR Agri Oswestry Limited | Manufacturing | 2009 |
| HOG Parks Limited | Arts & recreation | 2005 |
| Hogs Hollow Limited | Financial services | 2015 |
| Hogs Plant and Equipment Hire Limited | Administrative & support | 2023 |
| Hollies Cleaning Services Ltd | Administrative & support | 2025 |
| Holloway Road Holdings Limited | Real estate | 2019 |