| Kvle Ltd. | Information & communication | 2017 |
| KVP Online Retail Ltd | Wholesale & retail | 2026 |
| KVR Limited | Transport & logistics | 2026 |
| KVY Ltd | Construction | 2025 |
| KW Car Sales Ltd | Wholesale & retail | 2026 |
| KW Farm Services Limited | Manufacturing | 2015 |
| KW Lift Trucks (UK) Ltd | Manufacturing | 2020 |
| KW Platinum Wealth Ltd | Real estate | 2025 |
| Kwilaro Group Holdings Ltd | Financial services | 2026 |
| KWS Plumbing and Heating Ltd | Construction | 2026 |
| KWT and JAT Properties Ltd | Extraterritorial | 2016 |
| KX Construction Ltd | Construction | 2023 |
| KYC Surgery Limited | Administrative & support | 2017 |
| KYL Healthcare Services Limited | Health & social care | 2016 |
| Kylie Hart Design Ltd | Administrative & support | 2023 |
| Kynamco Limited | Manufacturing | 1994 |
| Kyrb Ltd | Real estate | 2025 |
| Kyss Care Limited | Health & social care | 2019 |
| Kyte's Interiors Limited | Construction | 2013 |
| L & C Bracey Limited | Construction | 2003 |
| L & C White Ltd | Real estate | 2021 |
| L & C White Residential Ltd | Real estate | 2023 |
| L & G Engineering Limited | Manufacturing | 2006 |
| L & J Pipework Limited | Construction | 2023 |
| L & L (Melton) Construction Ltd | Construction | 2024 |
| L & M James Properties Ltd | Real estate | 2024 |
| L & O Meats Limited | Wholesale & retail | 1999 |
| L & P Gases Limited | | 1983 |
| L & R Homes Ltd | Construction | 2019 |
| L & S Accounting Firm Ltd | Financial services | 2014 |
| L & S Accounting Firm Umbrella Ltd | Financial services | 2012 |
| L & S Financials Ltd | Professional & scientific | 2019 |
| L a Construction (East Anglia) Limited | Construction | 2009 |
| L a K Electrical Services Limited | Construction | 2016 |
| L a Mixology Limited | Wholesale & retail | 2021 |
| L a Robinson Architectural Services Ltd | Professional & scientific | 2017 |
| L a S Property Solutions Limited | Construction | 2019 |
| L B R Carpentry Ltd | Construction | 2016 |
| L Borland Company Ltd | Manufacturing | 2019 |
| L Brown Slickline Services Ltd | Mining & quarrying | 2023 |
| L Devlin Developments Ltd | Construction | 2015 |
| L G Consultancy (E.A.) Ltd | Administrative & support | 2020 |
| L Howlett Aviation Ltd | Manufacturing | 2025 |
| L J M Electrical Norwich Ltd | Construction | 2021 |
| L J P Small Business Services Ltd | Professional & scientific | 2010 |
| L P Mitchell Ltd | Information & communication | 2012 |
| L R S Anglia Ltd | Wholesale & retail | 2003 |
| L T Carpentry (Norwich) Ltd | Construction | 2017 |
| L V Bespoke Limited | Manufacturing | 2023 |
| L W Storage Limited | Transport & logistics | 2016 |
| L&B Holdings Anglia Ltd | Financial services | 2025 |
| L&B Vans Limited | Wholesale & retail | 2026 |
| L&B Ventilation Supplies Limited | Wholesale & retail | 2017 |
| L&C Photography Ltd | Professional & scientific | 2024 |
| L&D Properties (Norwich) Ltd | Real estate | 2020 |
| L&D Retail Group Ltd | Wholesale & retail | 2020 |
| L&G Foods Ltd | Wholesale & retail | 2011 |
| L&M Driving Limited | Transport & logistics | 2012 |
| L&M Investments Norfolk Ltd | Real estate | 2023 |
| L&M Pywell Ltd | Administrative & support | 2022 |
| L&P Plant Hire and Groundworks Ltd | Administrative & support | 2024 |
| L&P Properties (Norfolk) Ltd | Administrative & support | 2020 |
| L&T Carpentry Ltd | Manufacturing | 2022 |
| L'Hexagone Hospitality Limited | Hospitality | 2019 |
| L. Emery Transport Services Ltd | Transport & logistics | 2025 |
| L.E. Davis Construction Limited | Construction | 1997 |
| L.F. Process Engineering Ltd | Professional & scientific | 2018 |
| L.G. Harrison & SON Limited | Agriculture & fishing | 1982 |
| L.J. Group Limited | Professional & scientific | 2006 |
| L.J.Create Ltd | Manufacturing | 2022 |
| L.O. Sport Limited | Professional & scientific | 2013 |
| L.T Builders Ltd | Construction | 2025 |
| L.T.S. Properties (Norfolk) Limited | Real estate | 2021 |
| L4 Norfolk Ltd | Professional & scientific | 2019 |
| L61 Trading Limited | Professional & scientific | 2012 |
| LA Bella Legacy Ltd | Hospitality | 2020 |
| LA Ciclista Ltd | Wholesale & retail | 2018 |
| LA Cleaning Norwich Ltd | Administrative & support | 2023 |
| LA Condesa Ltd | Manufacturing | 2024 |
| LA Dolce Vita Caffè Italiano Ltd | Hospitality | 2026 |
| LA Strada Food Company Limited | Hospitality | 2026 |
| La-Mene Ltd | Information & communication | 2024 |
| LAA Hood Group Holdings Limited | Financial services | 2024 |
| Laaj Design and Build Limited | Construction | 2022 |
| LAB Tax Services Ltd | Professional & scientific | 2021 |
| Label Traders Limited | Wholesale & retail | 2020 |
| Labelld Ltd | Wholesale & retail | 2020 |
| Labradent Limited | Health & social care | 2025 |
| Labre Services Limited | Administrative & support | 2024 |
| Labs.Ventures Ltd | Wholesale & retail | 2023 |
| Laburnum Associates Limited | Construction | 2007 |
| Laburnum Drive Ltd | Real estate | 2020 |
| Laburnum Music Ltd | Information & communication | 2021 |
| Labyrinth Norwich Limited | Arts & recreation | 2017 |
| LAC Property Holdings Ltd | Real estate | 2019 |
| Laced Fairy Ltd | Information & communication | 2025 |
| Lacerta Estates Limited | Real estate | 2017 |
| Lacey Strategic Capital Ltd | Financial services | 2026 |
| Lacey Wholesale Limited | Wholesale & retail | 2014 |
| Lacuzzo Limited | Wholesale & retail | 2005 |