| Dawson's Building and Roofing Contractors Limited | Construction | 2025 |
| Dazigner Double Glazing Ltd | Construction | 2023 |
| Dentright Limited | Wholesale & retail | 2009 |
| Deon Studios Ltd | Information & communication | 2024 |
| Diaspora Health Statistics Ltd | Professional & scientific | 2015 |
| Digital IQ Marketing Limited | Administrative & support | 2023 |
| Dino's Ice Cream Parlour Limited | Hospitality | 2021 |
| Dino's Takeaway Ltd. | Hospitality | 2018 |
| Discount Department Store Limited | Wholesale & retail | 2020 |
| DJG Web Limited | Information & communication | 2009 |
| Dmvs Solutions Ltd | Administrative & support | 2023 |
| Domus Cambria Limited | Construction | 2011 |
| DP Consulting (NW) Limited | Wholesale & retail | 2017 |
| Dragon Subsea Ltd | Mining & quarrying | 2009 |
| Dragon Tiles Ltd | Wholesale & retail | 2016 |
| Dream Stream Media Ltd | Other services | 2025 |
| Duha Catering Ltd | Hospitality | 2023 |
| Duncalf Motor Services Ltd | Wholesale & retail | 2010 |
| Elliott and Cooper (Holdings) Ltd | Real estate | 2016 |
| Elliott and Cooper Ltd | Administrative & support | 2014 |
| Enozzle Ltd | Administrative & support | 2022 |
| ERW Villas Management Company Limited | Households | 2004 |
| Evansrenewables Ltd | Construction | 2026 |
| FG Innovations Limited | Arts & recreation | 2023 |
| Fortis Security Group UK Ltd | Education | 2025 |
| Frequency Five Ltd | Arts & recreation | 2004 |
| Fresh Ride Ltd | Wholesale & retail | 2025 |
| FU House 2023 Limited | Hospitality | 2023 |
| Fursan Adventures Limited | Education | 2020 |
| Gallaghermarketing Ltd | Wholesale & retail | 2022 |
| Gardian Family Ltd | Real estate | 2025 |
| Gareth Hughes & Co Holdings Limited | Financial services | 2024 |
| Gareth Hughes & Company Limited | Professional & scientific | 2007 |
| Gbrs Wind Ltd | Administrative & support | 2025 |
| Gizo 1 Ltd | Transport & logistics | 2025 |
| Glanwest Ltd | Construction | 2010 |
| Glyn O Evans Ltd | Construction | 2003 |
| Go Vertical Limited | Other services | 2025 |
| Gorwel Glas Road Management Company Limited | Professional & scientific | 2008 |
| Green Developments (NW) Ltd | Real estate | 2022 |
| Gundi 04 Ltd | Real estate | 2021 |
| Gwinllan Conwy Ltd | Manufacturing | 2016 |
| Halliwell Jones (North Wales) Limited | Wholesale & retail | 1976 |
| Harding Jones Associates Ltd | Professional & scientific | 2021 |
| Harmoni (NW) Limited | Hospitality | 2025 |
| Heddwyn Limited | Professional & scientific | 2018 |
| Hefin Jones Vehicle Body Repairs Ltd | Wholesale & retail | 2023 |
| Holding ALL Ltd | Real estate | 2019 |
| Hughes Bros Holdings Limited | Financial services | 2016 |
| Hughes Bros Properties Limited | Real estate | 2016 |
| Idris Mortgages Limited | Financial services | 2023 |
| Idris Property Services Limited | Real estate | 2022 |
| Imperial Hire Limited | Transport & logistics | 2026 |
| INK. Gallery Ltd | Wholesale & retail | 2022 |
| Iwed Limited | Information & communication | 2014 |
| J & E Project Management Services Ltd | Professional & scientific | 2012 |
| J&K Properties (NW) Ltd | Construction | 2026 |
| Jackdaw Clothing Ltd | Wholesale & retail | 2025 |
| Jamie Jones GAS Services Ltd | Construction | 2018 |
| JAZ Properties Limited | Real estate | 2016 |
| JB Property Maintenance Ltd | Construction | 2016 |
| JBA Management Limited | Real estate | 2023 |
| JC HV Inspection and Training Ltd | Real estate | 2019 |
| JC Renewable Projects Ltd | Professional & scientific | 2023 |
| Jeniosa Limited | Other services | 2015 |
| Jjra Investments Limited | Real estate | 2000 |
| JNE Security Limited | Administrative & support | 2001 |
| Jonpaul Gifts Limited | Wholesale & retail | 2003 |
| JSJ Joinery Limited | Construction | 2024 |
| JW Solutions Limited | Professional & scientific | 2026 |
| K R Security Systems Ltd | Information & communication | 2015 |
| Kerry Evans Limited | Administrative & support | 2022 |
| Keyhole Interiors Limited | Professional & scientific | 2017 |
| Keynote Homes Ltd | Real estate | 2020 |
| Kirby Jones Limited | Wholesale & retail | 1986 |
| KLJ Jointing Ltd | Professional & scientific | 2017 |
| KLP Property Services Ltd | Real estate | 2025 |
| KMC Holdings (Cheshire) Limited | Financial services | 2016 |
| Kzafa's & Co Ltd | Health & social care | 2021 |
| L M Private Support and Care Services Ltd | Health & social care | 2021 |
| Laragh Cleaning Services Ltd | Administrative & support | 2026 |
| Larchfield Bell LLP | | 2009 |
| LGR Holdings (NW) Limited | Administrative & support | 2023 |
| Lime (NW) Limited | Financial services | 2026 |
| Llandudno Hospitality Association | Other services | 1986 |
| Llandudno Wholesale (NW) Limited | Wholesale & retail | 2023 |
| Lunar Networks Ltd | Professional & scientific | 2019 |
| Lyon Wind CYF | Manufacturing | 2023 |
| M Hire Services Ltd | Transport & logistics | 2023 |
| M&M Reports Ltd | Health & social care | 2025 |
| MAC Electrical Wholesalers Limited | Wholesale & retail | 2017 |
| Mainwaring Services Ltd | Professional & scientific | 2020 |
| Mangara Trading Ltd | Wholesale & retail | 2016 |
| Manor Gate Estates Limited | Real estate | 2004 |
| Martrust Limited | Real estate | 2002 |
| Masters Caterings Team Limited | Hospitality | 2022 |
| Maxiwind Ltd. | Manufacturing | 2016 |
| MC Joinery and Maintenance Ltd | Construction | 2018 |
| MCL10 Ltd | Real estate | 2022 |
| MEDI4MEDICAL Ltd | Education | 2025 |