| Garibaldi Medico Limited | Health & social care | 2025 |
| Garibaldi's Lift Service Ltd | Manufacturing | 2025 |
| Garjoba Limited | Financial services | 2018 |
| Garjoba Management Limited | Professional & scientific | 2009 |
| Garland Creative Ltd | Professional & scientific | 2012 |
| Garnco Limited | Real estate | 2022 |
| Garvican Holdings Limited | Administrative & support | 2019 |
| Garvican Properties Limited | Real estate | 2019 |
| Gary Dykes Limited | Wholesale & retail | 2007 |
| Gary Fletcher (Surfacing) Limited | Construction | 1999 |
| Gary Harley Joinery Contractors Limited | Construction | 2005 |
| Gary Irons Painting and Decorating Services Limited | Construction | 2019 |
| Gary Mackie Civils Limited | Construction | 2019 |
| Gary Smithies Wealth Management Limited | Financial services | 2020 |
| Gary's Coaches Limited | Transport & logistics | 2002 |
| GAS and Plumb Care Ltd | Construction | 2012 |
| GAS and Welding Equipment Limited | Wholesale & retail | 1980 |
| GAS Check Ltd | Construction | 2026 |
| GAS Hub Plumbing & Heating Ltd | Construction | 2024 |
| GAS Lane Ltd | Professional & scientific | 2020 |
| GAS Servicing Plumbing and Heating Ltd | Construction | 2023 |
| GAS Training Solutions Limited | Administrative & support | 2009 |
| Gasbio Consultancy Ltd | Professional & scientific | 2024 |
| Gascoigne Designs Upholstery Manufacturers Limited | Manufacturing | 1993 |
| Gaskill Property Investments Limited | Real estate | 2025 |
| Gasleak Mountain C.I.C. | Arts & recreation | 2021 |
| Gaslow International Limited | Wholesale & retail | 1978 |
| Gasman Brews Ltd | Manufacturing | 2024 |
| Gasp Clothing Limited | Manufacturing | 2001 |
| Gastro Holdings Ltd | Real estate | 2020 |
| Gastro Holmes Limited | Construction | 2016 |
| Gastro Pubs Limited | Hospitality | 2006 |
| Gastronomo Limited | Hospitality | 2025 |
| Gate & Barrier Services Limited | Manufacturing | 2011 |
| Gate Inn Properties Limited | Real estate | 2002 |
| Gateway Court (Lincoln) Limited | Households | 2005 |
| Gateway East Midlands Electrical Limited | Construction | 2018 |
| Gateway Fuels Limited | Wholesale & retail | 1999 |
| Gateway House (Birmingham) Ltd | Construction | 2024 |
| Gatewaylist Ltd | Information & communication | 2013 |
| Gathering Clouds 2022 Ltd | Health & social care | 2022 |
| Gaudecia Limited | Health & social care | 2021 |
| Gaughan Investment Properties Limited | Real estate | 2021 |
| Gaughan's Construction Ltd | Construction | 2025 |
| Gaurika Music Ltd | Information & communication | 2014 |
| Gauteng Communication Ltd | Professional & scientific | 2019 |
| Gav-Hs Limited | Information & communication | 2019 |
| Gavcorp Ltd | Arts & recreation | 2020 |
| Gavin Brian Cleaning Company Ltd | Administrative & support | 2025 |
| Gavirol Consult Limited | Wholesale & retail | 2020 |
| Gavirol Ventures Limited | Other services | 2016 |
| GAW Nottingham Ltd | Extraterritorial | 2009 |
| Gaya Limited | Real estate | 2003 |
| Gayle & Sons Ltd | Construction | 2021 |
| GB 1 Ltd | Other services | 2024 |
| GB 7 PJ Ltd | Hospitality | 2023 |
| GB Awnings Ltd | Construction | 2022 |
| GB Bookkeeping Limited | Professional & scientific | 2006 |
| GB Cafe Ltd | Hospitality | 2016 |
| GB Car Wash Ltd | Wholesale & retail | 2019 |
| GB Code Blue Limited | Wholesale & retail | 2025 |
| GB Grounds Maintenance Ltd | Administrative & support | 2026 |
| GB Home Bargain Ltd | Wholesale & retail | 2025 |
| GB Housewares Ltd | Wholesale & retail | 2026 |
| GB Mortgage Consultancy Ltd | Financial services | 2020 |
| GB Oriental Diner Limited | Hospitality | 2024 |
| GB Property Consultants Limited | Hospitality | 2018 |
| GB Recruitment Ltd | Administrative & support | 2026 |
| Gb-Facilities Management Services Limited | Manufacturing | 2020 |
| Gbic Holdings Limited | Financial services | 2025 |
| GBJ Investments Limited | Construction | 1992 |
| GBJ Property Holdings Limited | Professional & scientific | 2014 |
| GBN Stores Limited | Wholesale & retail | 2025 |
| GBR Investing Limited | Financial services | 2022 |
| GBS Group Holdings Limited | Financial services | 2020 |
| GBW Holdings Limited | Financial services | 2019 |
| GC Digital Ltd | Professional & scientific | 2018 |
| GC Engineering & Quality Management Services Limited | Administrative & support | 2017 |
| GC Investment Property Ltd | Real estate | 2024 |
| GC Jordan's Consultancy Ltd | Information & communication | 2011 |
| GC Scientific Limited | Professional & scientific | 2021 |
| GC Tradevision Ltd | Wholesale & retail | 2021 |
| GC Wellbeing Limited | Health & social care | 2015 |
| GC8 Energy Ltd | Construction | 2022 |
| GCF Ventures Limited | Professional & scientific | 2022 |
| GCM Development Solutions Limited | Professional & scientific | 2023 |
| GCM Print & Packaging Service Limited | Extraterritorial | 1995 |
| Gcmc Properties Limited | Real estate | 2011 |
| GCO Beauty Limited | Wholesale & retail | 2021 |
| Gcourt Limited | Households | 2004 |
| Gcraft Joinery Ltd | Manufacturing | 2023 |
| GCS Building Ltd | Construction | 2026 |
| Gcsh Consultancy Ltd | Information & communication | 2024 |
| GD Associates (Nottingham) Ltd | Public administration | 2012 |
| GD Environment Ltd | Professional & scientific | 2024 |
| GD Furniture & Removal Ltd | Wholesale & retail | 2025 |
| GD Garden Rooms Ltd | Professional & scientific | 2025 |
| GD Haem Limited | Health & social care | 2010 |
| GD Marks Ltd | Administrative & support | 2022 |
| GD Power Services Limited | Construction | 2025 |