| Griplidkit Ltd | Wholesale & retail | 2025 |
| Grissag AG Ltd | Professional & scientific | 2016 |
| Gritty Consulting Limited | Professional & scientific | 2022 |
| Gritty Films | Information & communication | 2011 |
| Gritty Games Ltd | Arts & recreation | 2014 |
| Gritty Realism Productions Ltd. | Information & communication | 2010 |
| Grizkops Technologies Ltd | Information & communication | 2021 |
| Grizz UK Limited | Information & communication | 2012 |
| Grizzi Limited | Arts & recreation | 2018 |
| Grizzlies Company Limited | Wholesale & retail | 2022 |
| Grjm Consultancy Limited | Professional & scientific | 2018 |
| Grka Property Limited | Real estate | 2010 |
| Grkswrq Mart Ltd | Wholesale & retail | 2025 |
| Grne Properties Ltd | Real estate | 2023 |
| Groesfaen Properties Limited | Real estate | 1984 |
| Groeswen Farm Limited | Agriculture & fishing | 2022 |
| Groom Consulting Limited | Professional & scientific | 2016 |
| Grooming Boutique Ltd | Other services | 2025 |
| Groovy Television Ltd | Information & communication | 2012 |
| Grosa Marketing Technologies Ltd | Other services | 2019 |
| Grosvenor Capital Ventures Ltd | Information & communication | 2024 |
| Grosvenor Chase Limited | Administrative & support | 2015 |
| Grosvenor Talent Limited | Other services | 2022 |
| Grotto International Limited | Extraterritorial | 2016 |
| Ground Electrical & Developments Ltd | Construction | 2026 |
| Ground for Gospel Ministry CIC | Hospitality | 2026 |
| Ground Force Driveways & Landscaping Ltd | Construction | 2025 |
| Ground Media Ltd | Information & communication | 2025 |
| Ground Speed Haulage Ltd | Transport & logistics | 2025 |
| Ground Transportation Solutions Ltd | Administrative & support | 2019 |
| Groundbits Ltd | Administrative & support | 2017 |
| Grounded and Free Ltd. | Wholesale & retail | 2023 |
| Grounded by Atlas Ltd | Hospitality | 2026 |
| Group Administration Ltd | Real estate | 2025 |
| Group Bethel Ltd | Financial services | 2018 |
| Group ED Limited | Information & communication | 2016 |
| Group Enci International Ltd | Construction | 2020 |
| Group Olvia Ltd | Financial services | 2017 |
| Group Retreats Milton House Limited | Hospitality | 2019 |
| Group Travel JS Ltd | Professional & scientific | 2025 |
| Groupal Limited | Wholesale & retail | 2018 |
| Grovana Ltd | Wholesale & retail | 2025 |
| Grovana Talent Ltd | Administrative & support | 2026 |
| Grove Haus Properties Ltd | Real estate | 2025 |
| Grove Software Labs Ltd | Information & communication | 2025 |
| Groveney Properties Limited | Real estate | 2005 |
| Grovstate Ltd | Wholesale & retail | 2026 |
| Grow Business Leeds Ltd | Wholesale & retail | 2024 |
| Grow Circle LLP | | 2025 |
| Grow More Outsourcing Ltd | Other services | 2025 |
| Grow Music Ltd | Arts & recreation | 2026 |
| Grow US IT Services Limited | Information & communication | 2022 |
| Grow ZEN Ltd | Wholesale & retail | 2025 |
| GROW3 Limited | Professional & scientific | 2006 |
| Growbig Digital Ltd | Professional & scientific | 2025 |
| Growcap Digital Ltd | Information & communication | 2025 |
| Growcent Ltd | Information & communication | 2024 |
| Growfinity Ltd | Information & communication | 2025 |
| Growing Concerns Grounds Maintenance Ltd | Administrative & support | 2016 |
| Growing Futures Educational Psychology Ltd | Education | 2026 |
| Growing Green Cardiff CIC | Other services | 2024 |
| Growing Stronger Together CIC | Health & social care | 2025 |
| Growithcarla Ltd | Education | 2025 |
| Growright Ltd | Professional & scientific | 2026 |
| Growsess Ltd | Wholesale & retail | 2025 |
| Growsocialwork Limited | Information & communication | 2022 |
| Growth Continent Infrastructure Foundation | Education | 2010 |
| Growth Futures Limited | Professional & scientific | 2025 |
| Growth Mindset Movement Ltd | Professional & scientific | 2018 |
| Growth Place Limited | Financial services | 2015 |
| Growth Services Limited | Professional & scientific | 2019 |
| Growthcorp Solutions Ltd | Professional & scientific | 2018 |
| Growtik Ltd | Wholesale & retail | 2020 |
| Growtiple Ltd | Information & communication | 2023 |
| Growvias Systems Ltd | Information & communication | 2026 |
| Grozner Games Limited | Information & communication | 2026 |
| GRP Installation Services Ltd | Construction | 2018 |
| Grprint Ltd | Information & communication | 2025 |
| GRQ Enterprises Ltd | Information & communication | 2020 |
| GRR Tech Limited | Professional & scientific | 2008 |
| GRTEK23 Ltd | Health & social care | 2022 |
| Grumpy Monkey UK Limited | Wholesale & retail | 2019 |
| Grunen Systems Limited | Manufacturing | 2017 |
| Grupo IVE Ltd | Wholesale & retail | 2024 |
| Grupo RAS LLP | | 2007 |
| Grupo Reyes | Administrative & support | 2023 |
| Grvti Creations Limited | Information & communication | 2025 |
| Grwp Pentan Limited | Financial services | 2020 |
| Gryphon Leisure Limited | Hospitality | 1998 |
| GS (Human Resources) Limited | Extraterritorial | 2017 |
| GS Banga Properties Limited | Real estate | 2023 |
| GS Griffiths Accountants Ltd | Professional & scientific | 2019 |
| GS Health Ltd | Wholesale & retail | 2004 |
| GS Motors Cardiff Ltd | Wholesale & retail | 2026 |
| GS Payrol Services Ltd | Professional & scientific | 2025 |
| GS Training Consultants Ltd | Professional & scientific | 2022 |
| GS Verde Communications Limited | Professional & scientific | 2018 |
| GS Verde Corporate Limited | Professional & scientific | 2017 |
| GS Verde Group Limited | Professional & scientific | 2023 |
| GS Verde Holdings Limited | Financial services | 2016 |