| Kulothungan Ltd | Wholesale & retail | 2021 |
| Kumar Wear Ltd | Wholesale & retail | 2026 |
| Kunafatea Catering Ltd | Hospitality | 2023 |
| Kunafatea Dessert Ltd | Hospitality | 2023 |
| Kunafatea Restaurant Ltd | Hospitality | 2023 |
| Kunafatea Takeaway Ltd | Hospitality | 2023 |
| Kunal Gupta Property & Investments Limited | Real estate | 2023 |
| Kundai for Health Limited | Health & social care | 2021 |
| Kundi Glazing Ltd | Construction | 2026 |
| Kundi Home Ltd | Construction | 2022 |
| Kura Care Ltd | Health & social care | 2022 |
| Kurd Car Wash Ltd | Administrative & support | 2025 |
| Kurdish Community Organization Ltd | Health & social care | 2024 |
| Kurt's Retreat Ltd | Hospitality | 2024 |
| Kustomize Kingz Limited | Professional & scientific | 2013 |
| KW the Jeweller Ltd | Wholesale & retail | 2025 |
| Kwaremont Consulting Ltd | Information & communication | 2022 |
| Kwglam Limited | Other services | 2022 |
| Kwick FIX Property Maintenance Ltd | Construction | 2024 |
| Kwick Hire Ltd | Administrative & support | 2022 |
| Kwick Logistics 3112 Ltd | Transport & logistics | 2025 |
| Kwik Accident Helpline Limited | Other services | 2010 |
| Kwik Cars Yorkshire Limited | Transport & logistics | 2025 |
| Kwik FIX Car Clinic Ltd | Wholesale & retail | 2024 |
| Kwik Picture Framing Limited | Administrative & support | 2008 |
| Kwikpass Limited | Education | 2018 |
| Kwikscreens North East Ltd | Wholesale & retail | 2023 |
| Kwikshipretail Ltd | Wholesale & retail | 2026 |
| KWM Properties Ltd | Real estate | 2021 |
| KY Associates Limited | Professional & scientific | 2019 |
| Kyam Trading Ltd | Wholesale & retail | 2024 |
| Kyber Technologies Ltd | Information & communication | 2023 |
| KYE Clinic Ltd | Health & social care | 2019 |
| KYI Consultancy Ltd | Transport & logistics | 2025 |
| KYL Building & Ground Works Ltd | Construction | 2025 |
| KYL3 Ltd | Real estate | 2026 |
| Kyle Stephen Gill Engineering Ltd | Construction | 2014 |
| KYN Recruitment Ltd | Administrative & support | 2025 |
| Kynflo Ltd | Information & communication | 2026 |
| KYO Health Ltd | Professional & scientific | 2026 |
| KYR Cleaning Services Ltd | Administrative & support | 2025 |
| KZ Building Line Co Ltd | Construction | 2024 |
| KZ Financial Limited | Financial services | 2017 |
| KZR Group Ltd | Financial services | 2025 |
| L & B Property Investments Ltd | Real estate | 2019 |
| L & N Motors Limited | Wholesale & retail | 2024 |
| L & O Electrical Services Limited | Construction | 2009 |
| L and C Selected Boutique Limited | Wholesale & retail | 2023 |
| L and R Vision Ltd | Health & social care | 2016 |
| L Bertram Flooring Ltd | Construction | 2020 |
| L C C Car Sales Limited | Wholesale & retail | 2011 |
| L C Civil Engineering Group Ltd | Administrative & support | 2023 |
| L Dean & Co Limited | Professional & scientific | 2025 |
| L Hancock Ltd | Construction | 2023 |
| L M Fitness Ltd | Arts & recreation | 2011 |
| L M J Wholesale Ltd | Wholesale & retail | 2020 |
| L M Pickles Limited | Extraterritorial | 2024 |
| L N Portfolio Limited | Real estate | 2025 |
| L N Waste & Recycling Ltd | Water & waste | 2022 |
| L R Electrical Wholesale Limited | Wholesale & retail | 2013 |
| L Thomson Consulting Ltd. | Information & communication | 2015 |
| L to Drive.Com Limited | Education | 2012 |
| L&B Auto Point Ltd | Administrative & support | 2010 |
| L&H Commerce Ltd | Wholesale & retail | 2026 |
| L&H Lettings Limited | Real estate | 2025 |
| L&H Properties Ltd | Real estate | 2018 |
| L&J Roofing & Home Improvements Limited | Construction | 2023 |
| L&J UK Investments Limited | Real estate | 2020 |
| L&M Properties Investment Ltd | Real estate | 2024 |
| L&M Ventures Ltd | Hospitality | 2024 |
| L&Mps International Limited | Professional & scientific | 2018 |
| L&P Clearance Ltd | Wholesale & retail | 2025 |
| L&R Leisure NE Ltd | Hospitality | 2019 |
| L. a. Ayat Limited | Real estate | 2019 |
| L.&W.Morrell Limited | Construction | 1947 |
| L.A Krispy Ltd | Hospitality | 2025 |
| L.A.F Logistics Ltd | Transport & logistics | 2024 |
| L.A.R Global Solutions Ltd | Professional & scientific | 2026 |
| L.A.Tan Ltd | Other services | 2018 |
| L.J Plant and Commercial Ltd | Wholesale & retail | 2025 |
| L9 Control Solutions Ltd | Manufacturing | 2024 |
| LA Barista Coffee House Ltd | Wholesale & retail | 2026 |
| LA Beaute Aesthetics 1 Ltd | Other services | 2025 |
| LA Besi Restaurant Limited | Hospitality | 2005 |
| LA Bottega by Hoor Ltd | Wholesale & retail | 2025 |
| LA Clef Property Investments & Services Ltd | Real estate | 2019 |
| LA Crepe House Limited | Hospitality | 2017 |
| LA Dolci Ltd | Wholesale & retail | 2021 |
| LA Famiglia Europe Ltd | Wholesale & retail | 2024 |
| LA Formwork Limited | Extraterritorial | 2025 |
| LA Group Real Estate Bradford Ltd | Real estate | 2024 |
| LAB Construction Management Limited | Construction | 2017 |
| LAB Motor Spares Limited | Wholesale & retail | 1999 |
| Labbaik Hajj & Umrah Services (UK) Ltd | Administrative & support | 2007 |
| Labeebaz Ltd | Hospitality | 2023 |
| Label Heer Limited | Wholesale & retail | 2026 |
| Labelation Limited | Manufacturing | 2025 |
| Labking Ltd | Wholesale & retail | 2020 |
| Labour Group Builders Ltd | Construction | 2025 |
| Labourers Supply Chain Limited | Construction | 2025 |