| Kembe Solutions Ltd | Information & communication | 2016 |
| Kems Enterprise Ltd | Financial services | 2025 |
| Kendon Estates Ltd | Real estate | 2023 |
| Kenmow Y & W Group Ltd | Administrative & support | 2023 |
| Kenmow, Young & Wild Limited | Administrative & support | 2005 |
| Keratin One Academy Ltd | Other services | 2022 |
| Keratin One Ltd | Other services | 2021 |
| Kerfuffle Consultancy Ltd | Professional & scientific | 2018 |
| Kesar Sweets and Desi Chaat Ltd | Hospitality | 2024 |
| Kese Publishing Ltd | Information & communication | 2024 |
| Keystar (RC) Ltd | Construction | 2021 |
| Keystar Property Ltd | Construction | 2020 |
| KG Aarambh Ltd | Education | 2026 |
| KH TAN Ltd | Other services | 2023 |
| Khalidoscope Services Ltd | Health & social care | 2011 |
| Khalilbutt Ltd | Health & social care | 2021 |
| Khan Houses Limited | Real estate | 2025 |
| Kheersudha Ltd | Wholesale & retail | 2025 |
| Khonsu Technology Solutions Limited | Information & communication | 2025 |
| Khprint Ltd | Manufacturing | 2023 |
| Khus Ltd | Real estate | 2021 |
| Ki-Smile Limited | Professional & scientific | 2010 |
| Kibler Associates Limited | Administrative & support | 2017 |
| Kick OFF KID Limited | Arts & recreation | 2019 |
| Kid's Rock Club Ltd | Education | 2014 |
| Kilbane Holdings Ltd | Professional & scientific | 2024 |
| Killane Meadows Limited | Financial services | 2016 |
| Kiln Room Properties Limited | Real estate | 2024 |
| Kimbland Distillery Ltd | Manufacturing | 2017 |
| Kinetic Cubed Limited | Professional & scientific | 2005 |
| Kingdom Gold Ltd | Wholesale & retail | 2025 |
| Kingdom Sports Management Solutions Ltd | Arts & recreation | 2011 |
| Kingston Stores Limited | Wholesale & retail | 2023 |
| Kingstonian Storage Equipment Limited | Manufacturing | 1994 |
| KIP Mcgrath Tuition Sale LP | | 2024 |
| Kiss My Petals Limited | Wholesale & retail | 2012 |
| Kitchen Project Solutions (Yorkshire) Ltd | Wholesale & retail | 2018 |
| Kitchen Project Solutions Limited | Wholesale & retail | 2013 |
| Kitchens by Kemp Ltd | Construction | 2016 |
| Kivsk Limited | Real estate | 2021 |
| KL7 Brews Ltd | Manufacturing | 2024 |
| KL7 Homes Ltd | Real estate | 2022 |
| Klim Care Ltd | Administrative & support | 2026 |
| KMG Living Limited | Real estate | 2025 |
| KMG Structures Ltd | Construction | 2014 |
| KMH Business Change Ltd | Professional & scientific | 2012 |
| Kmha Ltd | Information & communication | 2021 |
| Knekt Hub Ltd | Professional & scientific | 2021 |
| Knekt Recruitment Ltd | Administrative & support | 2017 |
| Knight Polson Limited | Professional & scientific | 2014 |
| Knights Protection Services Ltd | Other services | 2016 |
| Knowle Portfolio Investments Limited | Administrative & support | 2000 |
| Knowledgeplus Technologies Ltd | Information & communication | 2018 |
| Koloki Ltd | Hospitality | 2025 |
| Konsang Limited | Construction | 2023 |
| Kontrad LLP | | 2005 |
| Koola Hoops Ltd | Manufacturing | 2021 |
| Koosha Limited | Hospitality | 2015 |
| Korah-Kyei G Limited | Health & social care | 2023 |
| Kosher Projects Ltd. | Arts & recreation | 2016 |
| Kottonknit Ltd | Wholesale & retail | 2021 |
| Kowabunga Sushi Limited | Hospitality | 2026 |
| Kozy Reno Limited | Real estate | 2022 |
| KPD Enterprises Ltd | Administrative & support | 2023 |
| KPS Real Estate Group Ltd | Real estate | 2025 |
| KPS Workspace Ltd | Real estate | 2009 |
| Krazi Limited | Wholesale & retail | 2024 |
| Krazi Shoes Limited | Wholesale & retail | 2026 |
| Kreativ Limited | Professional & scientific | 2000 |
| KS Beauty by KAI Limited | Other services | 2025 |
| KU Assets Ltd | Real estate | 2025 |
| Kuai Biotech Ltd | Professional & scientific | 2025 |
| Kuiper Systems Limited | Financial services | 2005 |
| Kumars Health Limited | Health & social care | 2023 |
| Kumon Sale Centre Ltd | Education | 2022 |
| Kumon Wilmslow LLP | | 2025 |
| KVP Enterprises Ltd | Real estate | 2023 |
| Kwikenergy Ltd | Construction | 2019 |
| Kwikhaus Ltd | Construction | 2020 |
| Kyndst Limited | Wholesale & retail | 2023 |
| Kyoko Nails Ltd | Other services | 2022 |
| L & E Associates Limited | Professional & scientific | 2015 |
| L & J Jones Limited | Agriculture & fishing | 2011 |
| L & M Company Holdings Limited | Financial services | 2026 |
| L & M Investment Management Limited | Other services | 2023 |
| L and M Residential Property Limited | Real estate | 2023 |
| L D R Limited | Construction | 2005 |
| L J Hospitality Management Limited | Hospitality | 2015 |
| L J J Media Limited | Information & communication | 2012 |
| L J Leonard Ltd | Professional & scientific | 2021 |
| L Rothwell Associates Limited | Administrative & support | 2023 |
| L&A International Ltd | Professional & scientific | 2015 |
| L&Cjtrading Ltd | Other services | 2024 |
| L&L Kent Limited | Health & social care | 2018 |
| L&R Property and Maintenance Ltd | Real estate | 2025 |
| L.G.K. Estates Limited | Real estate | 2001 |
| L7 Properties Limited | Real estate | 2020 |
| LA Family Property Limited | Real estate | 2022 |
| LA Sicario Ltd | Hospitality | 2025 |
| LA Skin Clinic Limited | Other services | 2020 |