| Gemkin Consultant Limited | Information & communication | 2023 |
| Gemma Harrison Limited | Other services | 2010 |
| Gemma Went Ltd | Professional & scientific | 2011 |
| Gemmi Logistics Limited | Transport & logistics | 2021 |
| Gemmini Faces Limited | Other services | 2024 |
| Gemo Consultants Ltd | Construction | 2022 |
| Gemporiam Birmingham Ltd | Wholesale & retail | 2023 |
| Gemport Jewellery Ltd | Manufacturing | 2017 |
| Gemrock 786 Ltd | Real estate | 2014 |
| Gems Transport Limited | Transport & logistics | 2020 |
| Gemsetter Limited | Other services | 2016 |
| Gemshot Ltd | Extraterritorial | 2008 |
| Gemster Ltd | Wholesale & retail | 2024 |
| Gemstone Capital Ltd | Real estate | 2013 |
| Gemstones Care Limited | Health & social care | 2020 |
| Gemstonz Ltd | Wholesale & retail | 2025 |
| GEN Consulting Solution Ltd | Information & communication | 2019 |
| GEN Elevate AI Ltd | Information & communication | 2025 |
| GEN Solutions Ltd | Information & communication | 2015 |
| GEN X Deals Limited | Wholesale & retail | 2025 |
| GEN XO Ltd | Professional & scientific | 2023 |
| GEN Z Group Limited | Information & communication | 2020 |
| GEN Z Media Limited | Professional & scientific | 2024 |
| Gen-Ix Ltd | Construction | 2026 |
| GEN. Tea Ltd | Hospitality | 2023 |
| GEN2 Systems Limited | Information & communication | 2007 |
| Genco A.M. Limited | Real estate | 2006 |
| Genco Asset Management Limited | Extraterritorial | 2008 |
| Genco Global Ltd | Manufacturing | 2016 |
| Genco Installation Ltd | Manufacturing | 2023 |
| Genco Real Estate Limited | Real estate | 2010 |
| Gender Health Care UK Ltd | Health & social care | 2022 |
| Gene Signature Limited | Professional & scientific | 2015 |
| Genemi Ltd | Transport & logistics | 2023 |
| General Asphalt Company Limited | Professional & scientific | 2006 |
| General Auto Ltd | Manufacturing | 2026 |
| General Classification Limited | Extraterritorial | 2010 |
| General Cleaners Limited | Administrative & support | 2023 |
| General Contractors Limited | Manufacturing | 2016 |
| General Counsel Legal Consulting Ltd | Professional & scientific | 2020 |
| General Fabrications Holdings Limited | Financial services | 2015 |
| General Fabrications Limited | Wholesale & retail | 1948 |
| General Furnishing Co. Limited | Hospitality | 1983 |
| General Line Commerce Ltd | Wholesale & retail | 2024 |
| General Maintenance and Cleaning Services EN Ltd | Construction | 2020 |
| General Performance Ltd | Wholesale & retail | 2022 |
| General Post (UK) Ltd | Construction | 2008 |
| General Practice Services Ltd | Health & social care | 2018 |
| General Public Projects Ltd | Arts & recreation | 2011 |
| General Security Guards Ltd | Administrative & support | 2021 |
| General Security Ltd | Other services | 2019 |
| General Staging and Events Crew Ltd | Administrative & support | 2024 |
| General Strip-Out Demolition Ltd | Construction | 2026 |
| General Trading London Ltd | Other services | 2024 |
| General Trading Solutions Ltd | Wholesale & retail | 2024 |
| Generali Saxon Land Development Company Limited | Real estate | 1999 |
| Generalist Group CIC | Education | 2025 |
| Generation England Community Interest Company | Education | 2008 |
| Generation Healthcare UK Limited | Health & social care | 2017 |
| Generation Vehicle Management Limited | Administrative & support | 2016 |
| Generet Eyes Limited | Health & social care | 2020 |
| Generic Robotics Limited | Professional & scientific | 2007 |
| Genericidea UK Ltd | Information & communication | 2022 |
| Genesis AKS Ltd | Health & social care | 2022 |
| Genesis Computer Services Ltd | Other services | 2006 |
| Genesis Control Systems (UK) Ltd. | Manufacturing | 1990 |
| Genesis Control Systems Ltd | Manufacturing | 2008 |
| Genesis Display Limited | Manufacturing | 1981 |
| Genesis Estate Homes Ltd | Real estate | 2026 |
| Genesis Express (Holdings) Limited | Transport & logistics | 2012 |
| Genesis Express Holdings (2022) Ltd | Financial services | 2022 |
| Genesis Express Ltd | Transport & logistics | 2005 |
| Genesis Group Solutions Limited | Administrative & support | 2000 |
| Genesis Healthcare Group Limited | Health & social care | 2019 |
| Genesis Innovations Limited | Professional & scientific | 2012 |
| Genesis Momentum Ltd | Manufacturing | 2018 |
| Genesis Recruitment 365 Ltd | Administrative & support | 2023 |
| Genesis Refurbishments Ltd | Construction | 2023 |
| Genesis Staffing Solutions Ltd | Administrative & support | 2026 |
| Genesis Technical Recruitment Limited | Administrative & support | 1998 |
| Genesis Transport UK Ltd | Transport & logistics | 2022 |
| Genesis Tutoring and Education Consultancy CIC | Education | 2021 |
| GENESIS24 Ltd | Administrative & support | 2024 |
| Genesysone Limited | Arts & recreation | 2025 |
| Genetic Signatute Limited | Professional & scientific | 2015 |
| Geneva PAY UK Limited | Financial services | 2025 |
| Gengen Limited | Wholesale & retail | 2026 |
| Genie Homes Management Ltd | Real estate | 2014 |
| Genie Printing & Mailing Ltd | Manufacturing | 1991 |
| Genie Private Tutors Franchises Ltd | Administrative & support | 2010 |
| Genie Records Ltd | Information & communication | 2009 |
| Genie Reprographics Ltd | Manufacturing | 2020 |
| Genie Tutors West Midlands Limited | Education | 2018 |
| Geniemax Ltd | Information & communication | 2014 |
| Genieri Limited | Construction | 2022 |
| Genify Limited | Wholesale & retail | 2024 |
| Genine's Healthcare Ltd | Health & social care | 2015 |
| Genisis Group Limited | Administrative & support | 2022 |
| Genisys Arct | Professional & scientific | 2015 |
| Genius Businesses Ltd | Wholesale & retail | 2018 |