| Fiftyshadestanningsalon Ltd | Other services | 2023 |
| Financial Modelling Consultants Limited | Professional & scientific | 2013 |
| Finlysis Intelligence Ltd | Information & communication | 2026 |
| Fire Service International Limited | Administrative & support | 1994 |
| Firekracker Ltd | Wholesale & retail | 2019 |
| FIRST4MATHS Academy Limited | Education | 2023 |
| Fish & Chips Llandudno Ltd | Hospitality | 2024 |
| Fit UK Training & Education Ltd | Education | 2010 |
| Flying Fish (North Wales) Ltd | Wholesale & retail | 2010 |
| Football IS Life Ltd | Wholesale & retail | 2022 |
| Forever Everton Limited | Manufacturing | 2023 |
| Forte's (Llandudno) Limited | Hospitality | 1994 |
| Forte's Retail Ltd | Hospitality | 2014 |
| Forte's Rhos Ltd | Hospitality | 2024 |
| Forward Progress Limited | Professional & scientific | 2013 |
| Fountains Cafe Bar Ltd | Hospitality | 2021 |
| Four Saints Hotels Limited | Wholesale & retail | 2013 |
| Frame Photo Ltd | Extraterritorial | 2018 |
| Free From Wines Limited | Extraterritorial | 2016 |
| Freeman-Jones Motorcycle Services Limited | Transport & logistics | 2022 |
| Freemasons'Hall(Llandudno)Limited(The) | Real estate | 1953 |
| Futro Limited | Information & communication | 2012 |
| G C N Developments Limited | Real estate | 1996 |
| G Mobley Electrics Ltd | Construction | 2013 |
| G Wind Offshore Services Ltd | Construction | 2013 |
| Games N Gear Limited | Wholesale & retail | 2017 |
| Gamlins Solicitors LLP | | 2010 |
| Gamrs Ltd | Other services | 2025 |
| Gary C Jones & SON Select Decorators Ltd | Construction | 2024 |
| Gautier Design Ltd | Manufacturing | 2022 |
| GC Close Protection Limited | Administrative & support | 2024 |
| Gear Menswear Ltd | Wholesale & retail | 2021 |
| Gear-Up Rentals Limited | Administrative & support | 2025 |
| Gentz Barbers Ltd | Other services | 2012 |
| George's Floors Ltd | Construction | 2026 |
| Georgia Duggan-Edwards Consulting Limited | Professional & scientific | 2022 |
| Geraint Davies Consulting (2022) Ltd | Information & communication | 2022 |
| Giddy Goat Productions Limited | Information & communication | 2013 |
| GLA Consultants Limited | Information & communication | 2017 |
| Glanrhyd Management Ltd | Real estate | 2015 |
| Gloddaeth Hotel Group Ltd | Hospitality | 2025 |
| Gloddaeth Limited | Real estate | 1997 |
| Glyn Farm Consulting Ltd | Health & social care | 2026 |
| GM Buses Limited | Transport & logistics | 2023 |
| GM Golf UK Ltd | Wholesale & retail | 2017 |
| God's Heart TV | Information & communication | 2022 |
| Gogarth Housing Consulting Limited | Professional & scientific | 2025 |
| Gogo Training Ltd | Health & social care | 2026 |
| Gold Data Limited | Agriculture & fishing | 2018 |
| Golden Cat Studios Ltd | Professional & scientific | 2020 |
| Golden Phoenix Restaurant Ltd | Hospitality | 2024 |
| Goldfinch Assessment Ltd | Information & communication | 2025 |
| Goodwin Electrical Ltd | Construction | 2022 |
| Gourmet Location Catering Ltd | Hospitality | 2017 |
| GP Assurance Support Ltd | Information & communication | 2025 |
| GPD Griffin Ltd | Hospitality | 2023 |
| GPLOCUM2U Limited | Health & social care | 2014 |
| Gradient Graphics Ltd | Arts & recreation | 2006 |
| Grampal Limited | Professional & scientific | 2014 |
| Graphic Applications Limited | Administrative & support | 1991 |
| Graze (North West) Limited | Hospitality | 2013 |
| Graze North Wales Limited | Hospitality | 2016 |
| Great Orme Golf CIC | Education | 2025 |
| Green Scaffolding Ltd | Construction | 2025 |
| Greentree Kitchens & Interiors Ltd | Wholesale & retail | 2022 |
| Griffin Technologies Ltd | Information & communication | 2013 |
| Griffiths Heating & Renewables Ltd | Construction | 2022 |
| Grilled Khana Limited | Hospitality | 2025 |
| Grove House Apartments Ltd | Real estate | 2018 |
| Grove House Apartments Management Limited | Households | 2022 |
| Grumpy's Circuits Limited | Professional & scientific | 2023 |
| Guardata Limited | Information & communication | 2012 |
| Gwasanaethau Meddygol Edwards Ltd | Health & social care | 2017 |
| Gwennan HAF Jones Limited | Professional & scientific | 2020 |
| GWR Recruitment Ltd | Administrative & support | 2020 |
| Gwyliau Penrhyn CYF | Hospitality | 2022 |
| GYM2ME Limited | Wholesale & retail | 2025 |
| H&F Partners Ltd | Financial services | 2023 |
| H.E.M.J. Limited | Professional & scientific | 2026 |
| Habibi Fast Food Ltd | Hospitality | 2024 |
| Hadley Events Ltd | Administrative & support | 2017 |
| Halemere Limited | Wholesale & retail | 2022 |
| Halmana Limited | Wholesale & retail | 2016 |
| Halmani Limited | Wholesale & retail | 2008 |
| Hard Way Endeavours Ltd | Professional & scientific | 2026 |
| Harmony Union Ltd | Other services | 2022 |
| Hart Parry CYF | Real estate | 2009 |
| Hartley Training Ltd | Professional & scientific | 2021 |
| Hatha Thai Ltd | Hospitality | 2022 |
| Healthstar Properties Ltd | Real estate | 2016 |
| Hearthstores Limited | Wholesale & retail | 2024 |
| Heartland Coffee Ltd | Extraterritorial | 2013 |
| Heatnet Limited | Professional & scientific | 2009 |
| Hefin Jones Holding Company Limited | Financial services | 2025 |
| Heliot Commercial Ltd | Real estate | 2022 |
| Helpu Ltd | Administrative & support | 2023 |
| Heron Way Management Company Limited | Households | 2002 |
| Hesketh Catering Limited | Hospitality | 2023 |
| High Kick Productions Ltd | Arts & recreation | 2023 |
| High Pastures Nursing Home Ltd. | Health & social care | 1998 |