| Erskine Road Tenants Society Ltd | Households | 2009 |
| Eryri Events Hire Limited | Hospitality | 2023 |
| Esthetic Smile Ltd | Health & social care | 2023 |
| Estimate-Services Ltd | Professional & scientific | 2013 |
| Eterna Care Ltd | Health & social care | 2017 |
| Eternal Flame Fires & Fireplaces Ltd | Wholesale & retail | 2003 |
| Eureka (North Wales) Ltd | Construction | 2019 |
| Euro Mini Market One Ltd | Other services | 2025 |
| Evans Garden Service Ltd | Administrative & support | 2015 |
| Evans, Wilson and Evans Limited | Construction | 1987 |
| Evenrock Limited | Real estate | 2008 |
| EW Management Consulting Limited | Professional & scientific | 2012 |
| Excel Civil Enforcement Limited | Administrative & support | 1996 |
| Excel Pipelines Ltd | Administrative & support | 2002 |
| Exemplar Pro Ltd | Professional & scientific | 2023 |
| Extra Clean and Care Limited | Administrative & support | 2025 |
| Extreme Solutions International Ltd | Construction | 2019 |
| F. Duckworth & Sons Limited | Real estate | 1949 |
| Fast Consultancy and Education Ltd | Arts & recreation | 2014 |
| Felton’S R & M Ltd | Water & waste | 2020 |
| Ferguson & Williams Holdings Limited | Financial services | 2020 |
| Ffibr CYF | Information & communication | 2025 |
| Ffrith WEN Limited | Hospitality | 2025 |
| Fifty Estates Limited | Real estate | 2025 |
| Fifty Five Capital Limited | Real estate | 2020 |
| Fine Line Aesthetics (NW) Limited | Health & social care | 2024 |
| Firemaster (Colwyn Bay) Limited | Administrative & support | 2002 |
| First Advantage Tennis Ltd | Arts & recreation | 2014 |
| First Layer Robotics Limited | Manufacturing | 2026 |
| Fish & Chips Shop Ltd | Hospitality | 2026 |
| Fit FAT Cook Limited | Other services | 2020 |
| Fixit Power Tools Ltd | Wholesale & retail | 2017 |
| FKN WIN Ltd | Arts & recreation | 2025 |
| Fleetsmart Ltd | Wholesale & retail | 2020 |
| Fletcher & Poole Ltd | Real estate | 2003 |
| FLO Blue Limited | Arts & recreation | 2025 |
| Florentina’S Limited | Other services | 2024 |
| Fluxerose Developments Ltd | Real estate | 2025 |
| Focus AIM Fire Limited | Wholesale & retail | 2011 |
| Focus Decor Ltd | Construction | 2016 |
| Foodshare North Wales CIC | Hospitality | 2020 |
| Forest Hill RTM Company Limited | Households | 2020 |
| Forever Clinics Limited | Hospitality | 2012 |
| Foreverk CIC | Professional & scientific | 2025 |
| Forget and LET Ltd | Hospitality | 2022 |
| Forrest Dentraeth Limited | Hospitality | 2014 |
| Forti-Bags Limited | Wholesale & retail | 2025 |
| Fortis Healthcare Limited | Administrative & support | 2021 |
| Fortis Home Care Limited | Health & social care | 2025 |
| Fortuna Management Solutions Ltd | Professional & scientific | 2022 |
| Forvara Limited | Extraterritorial | 2008 |
| Four Twenty Eight Ltd | Health & social care | 2020 |
| Fourways Motors Ltd | Wholesale & retail | 2024 |
| Fred Smith Capital Investments Limited | Financial services | 2015 |
| Freeston Estates Limited | Real estate | 2026 |
| French Polishing Emporium Ltd | Administrative & support | 2017 |
| Fresh Cleaning Ltd | Administrative & support | 2016 |
| Fresh Property Assets Ltd | Real estate | 2020 |
| Friendly Frog ORG CIC | Professional & scientific | 2025 |
| Fronfraith Property Management Limited | Administrative & support | 2004 |
| Frontline Developments (NW) Ltd | Construction | 2017 |
| Futurspaces+Futurworks Ltd | Professional & scientific | 2021 |
| Gary TEE Services Limited | Administrative & support | 2011 |
| GB Property Solution Limited | Construction | 2009 |
| GCL Developers Limited | Construction | 2016 |
| Gcms Consulting Limited | Professional & scientific | 2015 |
| Gcsa Ltd | Hospitality | 2019 |
| Gele Investments Ltd | Financial services | 2018 |
| Genics Investments Limited | Real estate | 2023 |
| George Henry James Vincent Ltd | Extraterritorial | 2025 |
| Geovista Ltd. | Manufacturing | 1998 |
| Gerddi Hospitality Group Limited | Hospitality | 2023 |
| GH Flooring Consultants Limited | Administrative & support | 2000 |
| Gillgrass Property Management Services Ltd | Households | 2021 |
| Gillies Williams & Associates Limited | Construction | 2004 |
| GKS Consultancy Limited | Professional & scientific | 2021 |
| Glan Conwy Sports Association CIC | Arts & recreation | 2019 |
| Glanfa ARW Property Management Limited | Administrative & support | 1996 |
| Global Heating and Plumbing Services Ltd | Construction | 2010 |
| Global Metals Supply Ltd | Wholesale & retail | 2025 |
| Global Tiles Limited | Wholesale & retail | 2002 |
| Glow Studio Limited | Manufacturing | 2023 |
| Goat Hotel Ltd | Hospitality | 2026 |
| Gogowatto Ltd | Hospitality | 2025 |
| Golden Scissors LL29 Ltd | Other services | 2025 |
| Goldthorn Partners Limited | Health & social care | 2000 |
| Goldyear Limited | Extraterritorial | 1979 |
| Good Motoring Limited | Wholesale & retail | 2002 |
| Good Signs Limited | Manufacturing | 2005 |
| GP Property Advisors Limited | Professional & scientific | 2012 |
| Grains Bakehouse Ltd | Manufacturing | 2016 |
| Gral Medical UK Ltd | Health & social care | 2026 |
| Grants Heating Limited | Construction | 2020 |
| Gray Properties UK Ltd | Real estate | 2005 |
| Gray's Gymnastics | Other services | 2015 |
| Great Escapes (Wales) Ltd | Administrative & support | 2013 |
| Green Valley Groundskeeping Ltd | Administrative & support | 2025 |
| Greenfield Garage Ltd | Wholesale & retail | 2022 |
| Greg LEG Media Limited | Information & communication | 2026 |
| Grey Court (Old Colwyn) Management Company Limited | Households | 2005 |