| Grillstream Continental Limited | Professional & scientific | 2013 |
| Grillz Aston Ltd | Hospitality | 2026 |
| Grillz Baba Ltd | Hospitality | 2025 |
| Grillz Express Limited | Hospitality | 2024 |
| Grillz Food UK Ltd | Hospitality | 2025 |
| Grillz Grillhouse Limited | Hospitality | 2021 |
| Grillz Ltd | Hospitality | 2026 |
| Grillz Shack Ltd | Hospitality | 2019 |
| Grimstock Avenue Residents Management Company Ltd | Households | 2017 |
| Grin Consultancy Limited | Professional & scientific | 2010 |
| Grind Derby Limited | Hospitality | 2026 |
| Grindhut Ltd | Wholesale & retail | 2025 |
| Grinning Dog Productions Ltd | Administrative & support | 2008 |
| Grinsells Roofing Ltd | Construction | 2019 |
| Griselda Limited | Transport & logistics | 2019 |
| Griseo Limited | Information & communication | 2026 |
| Grissan Energy UK Limited | Financial services | 2013 |
| Grit C.I.C C.I.C. | Health & social care | 2021 |
| Grizedale Media Limited | Other services | 2012 |
| Grizzly Strings Limited | Extraterritorial | 2017 |
| Grizzly Trans Ltd | Transport & logistics | 2022 |
| Grizzlyswalks Ltd | Other services | 2024 |
| GRK Designs Ltd | Professional & scientific | 2020 |
| GRK Structural and Technical Limited | Professional & scientific | 2025 |
| GRL Air Solutions Ltd | Construction | 2024 |
| Grland Ltd | Wholesale & retail | 2025 |
| Grlz Ltd | Hospitality | 2022 |
| Grmc Ltd | Professional & scientific | 2016 |
| Grmg Merchandise Ltd | Manufacturing | 2017 |
| Grmk Ltd | Wholesale & retail | 2023 |
| Grocery Cart Limited | Wholesale & retail | 2020 |
| Grocery Hub B'Ham Ltd | Wholesale & retail | 2023 |
| Grocery Kingdom Ltd | Wholesale & retail | 2021 |
| Grocery Shop Birmingham Ltd | Wholesale & retail | 2025 |
| Grocery to Go Limited | Wholesale & retail | 2014 |
| Grocery UK Ltd | Wholesale & retail | 2014 |
| Grocode Ltd | Information & communication | 2026 |
| Groku UK Limited | Wholesale & retail | 2024 |
| Gron Consult Limited | Financial services | 2016 |
| Gron Health Group Ltd | Hospitality | 2017 |
| Gronquist Holding Limited | Other services | 2020 |
| Groo Expert Ltd | Wholesale & retail | 2024 |
| Groofy Limited | Wholesale & retail | 2025 |
| Groom Wilkes & Wright LLP | | 2004 |
| Grooms Manufacturing Ltd | Manufacturing | 2018 |
| Groovefirst Limited | Manufacturing | 1986 |
| Groovy Digital Ltd | Wholesale & retail | 2026 |
| Groozey Limited | Wholesale & retail | 2025 |
| Gropath Education Consulting Ltd | Professional & scientific | 2026 |
| Grossett Property Solutions Ltd | Real estate | 2024 |
| Grostrategy Ltd | Professional & scientific | 2019 |
| Grosvenor Court RTM Company Ltd | Households | 2017 |
| Grosvenor Housing CIC | Real estate | 2019 |
| Grosvenor Housing Services CIC | Real estate | 2025 |
| Grosvenor Lawn Systems Limited | Administrative & support | 2016 |
| Grosvenor Partitioning and Storage Limited | Construction | 1991 |
| Grosvenor Place (Birmingham) Management Limited | Households | 2002 |
| Grosvenor Road Studios Ltd. | Information & communication | 2001 |
| Grosvenor ST Pauls Limited | Real estate | 2015 |
| Grosvenor Stainless Steels Limited | Extraterritorial | 1981 |
| Grosvenor Terrace Properties Limited | Real estate | 2001 |
| Grosvenor Tutoring Ltd | Education | 2025 |
| Grosvenor Wellington Management Company Limited | Households | 1994 |
| Ground 2 Air Cars Ltd | Transport & logistics | 2022 |
| Ground and Space Ltd | Real estate | 2025 |
| Ground Operation Equipment Support Limited | Manufacturing | 2007 |
| Ground Provision Ltd | Wholesale & retail | 2025 |
| Ground State Limited | Wholesale & retail | 2026 |
| Ground Theory Coffee Ltd | Manufacturing | 2025 |
| Ground Travels Ltd | Transport & logistics | 2023 |
| GROUNDH2O Plus Limited | Professional & scientific | 2016 |
| Groundline Estates Ltd | Construction | 2023 |
| Grounds for the Future CIC | Health & social care | 2021 |
| Groundwork Enterprises Limited | Other services | 1989 |
| Groundwork Trade Association Limited | Other services | 1999 |
| Groundwork UK Limited | Other services | 2010 |
| Group 360 Ltd | Real estate | 2024 |
| Group 77 Limited | Professional & scientific | 2016 |
| Group Five Construction (UK) Limited | Construction | 1984 |
| Group Housing Ltd | Real estate | 2026 |
| Group Invest Limited | Transport & logistics | 2017 |
| Group of Jimmys Express Ltd | Wholesale & retail | 2025 |
| Group Samco Ltd | Professional & scientific | 2025 |
| Group Silverline Limited | Financial services | 1999 |
| Group X Media Ltd | Professional & scientific | 2023 |
| Groupbus Limited | Transport & logistics | 2021 |
| Groupfound Limited | Administrative & support | 2026 |
| Groupo-Grass LLP | | 2015 |
| Grouse Investors Limited | Administrative & support | 1992 |
| Grove Court Residences RTM Company Limited | Households | 2024 |
| Grove Cycles Ltd | Wholesale & retail | 2022 |
| Grove Farm (Knowle) Management Company Limited | Households | 2007 |
| Grove Global Solutions Ltd | Wholesale & retail | 2018 |
| Grove LN Fish&Pizaa Ltd | Hospitality | 2025 |
| Grove Multi Foods Ltd | Wholesale & retail | 2020 |
| Grove of Rugby Limited | Transport & logistics | 1974 |
| Grove Online Store Ltd | Wholesale & retail | 2023 |
| Grove Photographic & OFF Licence Ltd | Wholesale & retail | 2010 |
| Grove Property Moseley Ltd | Real estate | 2024 |
| Grove Scaffold Ltd | Construction | 2025 |