| I S Consultancy (UK) Ltd | Manufacturing | 1995 |
| I-Pal Flintshire Ltd | Wholesale & retail | 2019 |
| I.G. Driver Logistic Ltd | Transport & logistics | 2018 |
| IBI Media Limited | Wholesale & retail | 2010 |
| Infinity Gates Limited | Manufacturing | 2022 |
| Insignia Label Solutions Ltd | Manufacturing | 2010 |
| Instant Crusher Spares Limited | Manufacturing | 2014 |
| Insurd Limited | Financial services | 1985 |
| Interclad (Roofing and Cladding) Limited | Construction | 1996 |
| International Crusher Solutions Limited | Manufacturing | 1991 |
| Internet Bargains Limited | Wholesale & retail | 2021 |
| IR9 Ltd | Arts & recreation | 2026 |
| Ironquote Limited | Information & communication | 2025 |
| IS Group Signs Limited | Extraterritorial | 2026 |
| Ismells Limited | Wholesale & retail | 2011 |
| J & P Coffee and Retail Ltd | Wholesale & retail | 2022 |
| JAM Imports Limited | Wholesale & retail | 2015 |
| Jarlife Homes Limited | Real estate | 2024 |
| Jarlife Limited | Information & communication | 2008 |
| Jdmh Blade Repair Ltd | Manufacturing | 2025 |
| Jhsbel Ltd | Wholesale & retail | 2025 |
| Jinnyb & Co Ltd | Manufacturing | 2023 |
| JJ Tanning Ltd | Other services | 2019 |
| JLA Contracts Ltd | Construction | 2025 |
| JNJ Health Ltd | Health & social care | 2019 |
| JON Cars Ltd | Transport & logistics | 2023 |
| Jonarve Limited | Manufacturing | 1992 |
| Jones Construction (Flintshire) Limited | Construction | 2025 |
| JSE Trading Ltd | Hospitality | 2025 |
| JT FX Investments Ltd | Financial services | 2022 |
| JW Transport Solutions Ltd | Transport & logistics | 2016 |
| K T Plastics Limited | Water & waste | 2022 |
| K1 Car Sales Ltd | Wholesale & retail | 2022 |
| K9 Nutrition Flintshire Ltd | Manufacturing | 2021 |
| Kanum Ltd | Wholesale & retail | 2024 |
| KDC Development Limited | Construction | 2025 |
| KDS Scaffolding North West Ltd | Construction | 2018 |
| Kingswoods Roofing Solutions Ltd | Construction | 2024 |
| KJ Resourcing Ltd | Administrative & support | 2013 |
| KMS Home Improvements Ltd | Construction | 2026 |
| Kool Kuts Ltd | Other services | 2021 |
| Kordalski Transport Limited | Transport & logistics | 2018 |
| Krakow Mini Market Flint Limited | Wholesale & retail | 2024 |
| KS Cleaning & Property Management Services Ltd | Administrative & support | 2026 |
| L E & P H Properties Limited | Real estate | 2016 |
| Lanway Crushers Limited | Manufacturing | 2014 |
| Lbcw Ltd | Hospitality | 2021 |
| Learning Futures Ltd | Hospitality | 2023 |
| Lesgar Properties Limited | Real estate | 2017 |
| Lesgar Taverns Limited | Hospitality | 2018 |
| LEUNGPHO168 Ltd | Hospitality | 2025 |
| Levenday Ltd | Administrative & support | 2011 |
| Lewis Johnson Golf Limited | Wholesale & retail | 2022 |
| Lexon Solutions CYF | Manufacturing | 2023 |
| Likya Mediterranean Kitchen Ltd | Hospitality | 2025 |
| Lilly Fashion Boutique Ltd. | Wholesale & retail | 2022 |
| Lisa Turner Limited | Information & communication | 2018 |
| LKJ Hair Limited | Other services | 2026 |
| Llewelynarmoury Limited | Wholesale & retail | 2025 |
| Lloyd Power Solutions Limited | Construction | 2025 |
| LOW Cost Storage Limited | Arts & recreation | 2012 |
| Luntstone Limited | Construction | 2003 |
| LUX Car Care NW Ltd | Administrative & support | 2025 |
| M & H Skincare Limited | Wholesale & retail | 2025 |
| Mansfield Crushers Ltd | Manufacturing | 2003 |
| Marmar Delivery Ltd | Transport & logistics | 2026 |
| Marmaris Nice Barber(Flint) Ltd | Other services | 2022 |
| Maycroft (2015) Limited | Real estate | 2015 |
| Mcintyre Couriers Limited | Transport & logistics | 2025 |
| Medical GAS Solutions Limited | Health & social care | 2003 |
| MEI (NW) Limited | Real estate | 2025 |
| Meksol Ltd | Construction | 2018 |
| Messiah Holdings Limited | Financial services | 2026 |
| Metal Wall Art UK Ltd | Manufacturing | 2024 |
| MG Engineering Ltd | Construction | 1992 |
| Mijmoj Design Limited | Manufacturing | 2013 |
| Milanconnection Limited | Other services | 2023 |
| Millspubcompany Ltd | Hospitality | 2026 |
| Minilove Ltd | Wholesale & retail | 2020 |
| Ministry of Christianity Limited | Administrative & support | 2024 |
| Mirror Curls Ltd | Other services | 2011 |
| MJ Projects NW Ltd | Construction | 2024 |
| MM32 Limited | Real estate | 2018 |
| Mmpp Property Ltd. | Real estate | 2024 |
| Molyneux Surveyors Limited | Professional & scientific | 2005 |
| Morning Glory Limited | Professional & scientific | 2018 |
| Motorhome Adventure Hire Ltd | Administrative & support | 2019 |
| MPH Golf Limited | Arts & recreation | 2020 |
| MSC Plumbing and Heating Ltd | Construction | 2018 |
| Music IS NOW Venues Limited | Hospitality | 2025 |
| Neocharis Ltd | Professional & scientific | 2025 |
| New Horizon Biofuel & Animal Beddings Co Ltd | Wholesale & retail | 2019 |
| New Horizon Plastics Co Ltd | Water & waste | 2019 |
| New Horizon Plastics Products Limited | Wholesale & retail | 2019 |
| Newko UK Limited | Wholesale & retail | 2011 |
| Nice-Pak International Limited | Manufacturing | 1987 |
| Nlbm Investments Limited | Real estate | 2024 |
| North East Wales Homes Limited | Real estate | 2014 |
| North GAS Services Ltd | Construction | 2024 |
| North Wales Restaurants Limited | Hospitality | 2022 |