| FO Perspectives Ltd | Administrative & support | 2024 |
| Folawig Ltd | Wholesale & retail | 2025 |
| Football Fever Academy Ltd | Education | 2021 |
| Football Fever United Community Interest Company | Education | 2023 |
| Forbes Consultancy Services Ltd | Information & communication | 2018 |
| Forest Court (Purley) RTM Company Limited | Households | 2012 |
| Forman Limited | Other services | 2002 |
| Fortheballer Ltd | Information & communication | 2024 |
| Fortress Guard Ltd | Wholesale & retail | 2025 |
| Fortune River Ltd | Professional & scientific | 2019 |
| Forty Two Point Eight Limited | Information & communication | 2014 |
| Fosca Tech Ltd | Manufacturing | 2024 |
| Foster and Foster Design Limited | Construction | 2017 |
| Foxley 2 Investment Properties Limited | Real estate | 2016 |
| Foxley Lane Limited | Health & social care | 2006 |
| Foxley Lodge Care Ltd | Health & social care | 2009 |
| Foxley Management Limited | Households | 2006 |
| Foxley Motors Limited | Wholesale & retail | 1956 |
| Framework IT Solutions Limited | Information & communication | 2026 |
| Frantic FOX Publishing Ltd | Information & communication | 2023 |
| Frantronics Limited | Manufacturing | 1988 |
| Fraser Oswald Holdings Limited | Real estate | 2020 |
| Freedom Temple Ltd | Real estate | 2023 |
| Freight Flex Ltd | Transport & logistics | 2024 |
| Frequant Limited | Administrative & support | 2018 |
| Frequency Recruitment Ltd | Administrative & support | 2025 |
| Fresh Sushi Ltd | Hospitality | 2025 |
| Freshfield Investment Limited | Manufacturing | 2012 |
| Freshly Homemade Ltd | Hospitality | 2019 |
| Fromby Productions Limited | Construction | 2001 |
| FS Design & Build Purley Limited | Other services | 2015 |
| FS Investments Purley Limited | Construction | 2021 |
| Futurewise Consultancy Limited | Professional & scientific | 2018 |
| G & R Construction Ltd | Construction | 2013 |
| G W Traders Ltd | Water & waste | 2014 |
| G-Amp Properties Limited | Real estate | 2024 |
| G11 Construction Services & Design Management Limited | Real estate | 2015 |
| G11 Rental Service Ltd | Real estate | 2023 |
| G11 Services & Design Management LLP | | 2021 |
| G11 Technical Design Services Limited | Administrative & support | 2016 |
| G1UK Limited | Wholesale & retail | 2016 |
| GAI Dynamics Limited | Manufacturing | 2023 |
| Gaiger Limited | Wholesale & retail | 2008 |
| Gallant Packaging Limited | Administrative & support | 2024 |
| Garden Scents Ltd | Wholesale & retail | 2020 |
| Garlis Holdings Limited | Wholesale & retail | 2014 |
| Gateway Pharma Ltd | Professional & scientific | 2026 |
| Gayathri Fashions Ltd | Wholesale & retail | 2020 |
| GB Visa Solutions Ltd | Administrative & support | 2017 |
| Gben Limited | Administrative & support | 2015 |
| GCC Group Holdings Ltd | Financial services | 2025 |
| GCC Therapeutic Homes Ltd | Education | 2025 |
| GEM Standard Limited | Wholesale & retail | 2024 |
| Gemmel Services Limited | Health & social care | 2024 |
| General Reserve of Digital Assets Limited | Financial services | 2023 |
| Genesis Healthcare 365 Ltd | Health & social care | 2021 |
| Genesol Ltd | Financial services | 2019 |
| Geofelix Prime Solution Ltd | Information & communication | 2024 |
| Geola Nominees Limited | Professional & scientific | 2010 |
| George & ANN Properties Ltd | Real estate | 2020 |
| Germania Secretaries Limited | Professional & scientific | 2010 |
| Giacotross Limited | Professional & scientific | 2018 |
| Giant ANT Ltd | Wholesale & retail | 2020 |
| Gigahaus Properties Limited | Real estate | 2021 |
| Gigante Group Ltd | Transport & logistics | 2019 |
| Gigatag Ltd | Information & communication | 2010 |
| Ginza Roman Limited | Wholesale & retail | 2023 |
| GK Sarfo Ltd | Construction | 2020 |
| Glamor'Eyes' Ltd | Other services | 2011 |
| Glasshouse Technologies Ltd | Professional & scientific | 2020 |
| Global Comptech Company Limited | Information & communication | 2019 |
| Global House Holdings Ltd | Real estate | 2022 |
| Global Scopes Ltd | Administrative & support | 2016 |
| Glory School of Motoring Limited | Administrative & support | 2020 |
| Glyn Daniel Ltd | Professional & scientific | 2020 |
| Gmecom Ltd | Wholesale & retail | 2024 |
| Go Crunchy Limited | Other services | 2021 |
| Go FIX Property Maintenance Ltd | Administrative & support | 2022 |
| Go to Build Ltd | Construction | 2020 |
| Goblin Wellness Ltd | Wholesale & retail | 2025 |
| Goclarity AI Ltd | Education | 2026 |
| Godstone Road (NO 28) Lessees Limited | Households | 1960 |
| Goes Engineering Limited | Professional & scientific | 2010 |
| Goland Developments Limited | Construction | 2005 |
| Gold Care Services Ltd | Health & social care | 2008 |
| Gold Dust Holdings Ltd | Real estate | 2023 |
| Golden Blue Limited | Wholesale & retail | 2023 |
| Goldpride Consultancy Limited | Financial services | 2006 |
| Goldstar Group Healthcare Limited | Financial services | 2022 |
| Goldstar Group Wealth Limited | Financial services | 2022 |
| Goldstar Healthcare Limited | Financial services | 2001 |
| Goldstar Insurance Services Limited | Financial services | 1991 |
| Golf International Limited | Administrative & support | 1994 |
| Gollmann Zwick UK Limited | Other services | 2021 |
| Good for ME UK Limited | Wholesale & retail | 2025 |
| Good Pooch London Ltd | Wholesale & retail | 2020 |
| Govardhan Hill LLP | | 2020 |
| Governance and Justice Group Limited | Professional & scientific | 2016 |
| Governance and Justice Limited | Professional & scientific | 2011 |
| Grace Heights RTM Company Limited | Households | 2024 |