| Griffin Landscapes Limited | Administrative & support | 2021 |
| Griffin of London Limited | Manufacturing | 2003 |
| Griffon Private Securities Ltd | Professional & scientific | 2025 |
| Grill Foods London Ltd | Hospitality | 2019 |
| Grimsmo Consulting Ltd | Information & communication | 2010 |
| GRM Surveying Ltd | Construction | 2015 |
| GRM Telecoms Limited | Information & communication | 2015 |
| GRO Trans Limited | Transport & logistics | 2016 |
| Grocery Guruji Limited | Wholesale & retail | 2016 |
| Groombuddy Ltd | Wholesale & retail | 2025 |
| Groove With Gully Limited | Arts & recreation | 2022 |
| Groove'N'Play Ltd | Education | 2025 |
| Gross Draughting Services Limited | Professional & scientific | 2007 |
| Grosvenor (NW2) Freehold Limited | Real estate | 2007 |
| Grosvenor Shipbrokers Ltd. | Extraterritorial | 1999 |
| Grosvenor Smythe OIL Tankers Limited | Extraterritorial | 1994 |
| GROSVENOR1417 Limited | Real estate | 2022 |
| Ground Frame Construction Ltd | Construction | 2020 |
| Ground Worker Solutions Ltd | Construction | 2024 |
| Ground Zero Investment Ltd | Real estate | 2022 |
| Groundwork Framework Solutions Limited | Construction | 2016 |
| Group 4 Wheels Limited | Manufacturing | 2012 |
| Group AG Limited | Construction | 2019 |
| Groupe PB2 Invest Limited | Transport & logistics | 2010 |
| Grove House Harrow Limited | Real estate | 2013 |
| Grove Legends Ltd | Wholesale & retail | 2022 |
| Grove Treecore Ltd | Wholesale & retail | 2024 |
| Grove Vale RTM Company Limited | Households | 2026 |
| Grove(Wm) Limited | Construction | 2007 |
| Grovehawk Ltd | Hospitality | 2000 |
| Grovehouse Financial Services Ltd | Financial services | 2018 |
| Grover Management Limited | Administrative & support | 2015 |
| Groves Hill Ltd | Real estate | 2023 |
| Grovewell Estates Limited | Health & social care | 2008 |
| Grow Search Franchise Ltd | Information & communication | 2016 |
| Grow With ME Ltd | Wholesale & retail | 2019 |
| Growhaus Ltd | Real estate | 2021 |
| Growing Globe Consultants Limited | Education | 2022 |
| Growing Grey and Living the Dream Ltd | Real estate | 2022 |
| Growitanya Fincuts Ltd | Professional & scientific | 2025 |
| Grownt Limited | Wholesale & retail | 2025 |
| Growth Accelerate Ltd | Wholesale & retail | 2026 |
| Growth CTO Ltd | Information & communication | 2024 |
| Growth Director Ltd | Professional & scientific | 2025 |
| Grpb Ltd | Real estate | 2023 |
| GRS Locums Ltd | Health & social care | 2007 |
| Grundlingh Limited | Other services | 2012 |
| Grupo Erik UK Limited | Administrative & support | 2021 |
| Grupo Raycall LLP | | 2014 |
| GRV Commercial LLP | | 2020 |
| GS Advisory Limited | Professional & scientific | 2018 |
| GS Banwait Limited | Other services | 2007 |
| GS Building Design Limited | Professional & scientific | 2016 |
| GS GEO Limited | Construction | 2021 |
| GS Giftbouquets Ltd | Wholesale & retail | 2022 |
| GS INT Ltd | Wholesale & retail | 2023 |
| GS Next Generation Limited | Real estate | 2025 |
| GS Retail Traders Limited | Wholesale & retail | 2014 |
| GS Wholesalers Ltd | Wholesale & retail | 2014 |
| GS2 Technologies Limited | Information & communication | 2020 |
| GSA Chauffeuring Limited | Transport & logistics | 2026 |
| GSB Comms Limited | Professional & scientific | 2025 |
| GSB London Ltd | Wholesale & retail | 2020 |
| GSB Realtors Ltd | Real estate | 2025 |
| Gschiel Ltd | Real estate | 2022 |
| GSD Asset Management Limited | Extraterritorial | 2011 |
| GSJ Accountants Ltd | Professional & scientific | 2021 |
| Gskp Properties Limited | Real estate | 2025 |
| GSL Capita Limited | Real estate | 2018 |
| GSL Group Ltd | Real estate | 2018 |
| GSL Renovations Limited | Other services | 2017 |
| Gsmv Properties and Lettings Ltd | Real estate | 2023 |
| Gsmv Syscon Ltd | Information & communication | 2014 |
| GSN Immigration Ltd | Professional & scientific | 2013 |
| GSN Solutions Ltd | Administrative & support | 2019 |
| GSP Infracon Ltd | Construction | 2026 |
| Gsparks Electrical Services Ltd | Construction | 2020 |
| GSR2R Limited | Administrative & support | 2001 |
| GST International Limited | Real estate | 2009 |
| GSV Building Ltd | Construction | 2018 |
| GT Academy Group Limited | Wholesale & retail | 1996 |
| GT Consultancies Ltd | Professional & scientific | 2019 |
| GT Logistic England Ltd | Transport & logistics | 2010 |
| GT Prime Systems Ltd | Construction | 2026 |
| GT Sport Ltd | Wholesale & retail | 2012 |
| GTES73 Limited | Professional & scientific | 2011 |
| GTI Investments Limited | Households | 2005 |
| GTM Cleaning Limited | Administrative & support | 2020 |
| GTS Cars Ltd | Wholesale & retail | 2023 |
| GTS Group Construction Ltd | Construction | 2024 |
| GTS Tuning Limited | Administrative & support | 2023 |
| Gtuu Student Services Limited | Education | 2004 |
| Gtxcell Ltd | Professional & scientific | 2020 |
| GTZ Utility Ltd | Other services | 2022 |
| Guaai Ltd | Wholesale & retail | 2025 |
| Guard International Limited | Construction | 2024 |
| Guardian Capital Partners Limited | Construction | 2017 |
| Guerin Consulting Services Ltd | Professional & scientific | 2020 |
| Guestents Ltd | Arts & recreation | 2018 |
| Gufic UK Limited | Wholesale & retail | 2022 |