| Knaphill Management Company Limited | Households | 2021 |
| Knaphill Print Company Limited | Manufacturing | 1966 |
| Knights & Shah Legal UK Ltd | Professional & scientific | 2021 |
| Knightswood Construction Ltd | Construction | 2023 |
| Knjpp Limited | Real estate | 2020 |
| Knockout Bars Limited | Hospitality | 2022 |
| Knockout Media Limited | Professional & scientific | 2024 |
| Koala Kids Parties Ltd | Arts & recreation | 2023 |
| Kobayashi Maru Limited | Hospitality | 2024 |
| Koel Consulting Ltd | Professional & scientific | 2021 |
| Komak Nexus Limited | Information & communication | 2025 |
| Kone Pension Trustees Limited | Financial services | 1980 |
| Kone Public Limited Company | Manufacturing | 1978 |
| Kookaburra Construction Limited | Real estate | 2016 |
| Kookuu Kouture Wholesale Ltd | Wholesale & retail | 2022 |
| Kosli Services Ltd | Transport & logistics | 2022 |
| Kothes UK Limited | Information & communication | 2019 |
| Koya Consulting Ltd | Manufacturing | 2018 |
| KP Social Care Training Limited | Education | 2009 |
| Kpcare Ltd | Wholesale & retail | 2024 |
| Kpks Properties Ltd | Real estate | 2019 |
| KPS Developments Limited | Construction | 2020 |
| Kpva Investments Limited | Real estate | 2026 |
| KR Plumbing and Heating Ltd | Construction | 2025 |
| Kranial Solutions Limited | Professional & scientific | 2019 |
| KRB Limited | Construction | 2007 |
| Kredas Global Ltd | Administrative & support | 2012 |
| Kreder Accounting Limited | Professional & scientific | 2014 |
| Krenn-Tek Limited | Administrative & support | 2017 |
| Krisdev Ltd | Real estate | 2025 |
| Kristina Holland Consultancy Services Limited | Information & communication | 2013 |
| KRM Property Investments Ltd | Real estate | 2024 |
| KRO Coaching Ltd | Education | 2024 |
| KRS Solutions Limited | Information & communication | 2014 |
| Krupa Associates Limited | Professional & scientific | 2014 |
| Krynet Limited | Arts & recreation | 2024 |
| KS Carr Ltd | Professional & scientific | 2016 |
| KS Global Limited | Administrative & support | 2025 |
| KSA Consulting Ltd | Professional & scientific | 2023 |
| KSS Accountants Limited | Professional & scientific | 2015 |
| KT Transport & Removals Ltd | Transport & logistics | 2023 |
| Ktein Biotech (UK) Limited | Wholesale & retail | 2025 |
| Kuberan Limited | Real estate | 2017 |
| Kudos Homes Limited | Construction | 2019 |
| Kudos Property Consulting Limited | Administrative & support | 2013 |
| KUL Ventures Ltd | Wholesale & retail | 2024 |
| Kustm Design Limited | Professional & scientific | 2026 |
| Kutoa London Limited | Other services | 2014 |
| Kuwait Petroleum (U.K. Holdings) Limited | Wholesale & retail | 1986 |
| Kuwait Petroleum International Aviation Company (U.K.) Limited | Wholesale & retail | 1983 |
| Kuwait Petroleum International Aviation Company Limited | Wholesale & retail | 1983 |
| Kuwait Petroleum International Limited | Professional & scientific | 1983 |
| Kuwait Petroleum International Lubricants (UK) Limited | Administrative & support | 1986 |
| Kuwait Petroleum International Treasury Services Limited | Financial services | 1966 |
| Kuwait Petroleum Lubricants Limited | Extraterritorial | 1988 |
| Kuwait Petroleum Services Limited | Transport & logistics | 2018 |
| Kwaizai Ltd | Information & communication | 2026 |
| Kwama Mondial Group (UK) Limited | Mining & quarrying | 2021 |
| Kybosh Props Limited | Transport & logistics | 2014 |
| Kylo Kens Ltd | Extraterritorial | 2023 |
| Kyspf Limited | Professional & scientific | 2011 |
| Kzis Limited | Transport & logistics | 2019 |
| L E Marshall & Co Ltd | Extraterritorial | 2012 |
| L J Studios Limited | Information & communication | 2018 |
| L T J Holdings Limited | Financial services | 2018 |
| L&C Properties (Surrey) Limited | Real estate | 2022 |
| L. & S. Building Services Limited | Professional & scientific | 2007 |
| LA Loupe Financiere Ltd | Information & communication | 2019 |
| LA Property (Surrey) Limited | Real estate | 2024 |
| LA Suerte Limited | Health & social care | 2022 |
| La-Vora Search Limited | Professional & scientific | 2014 |
| Label Bits Ltd. | Manufacturing | 2015 |
| LAC 2021 Limited | Water & waste | 2021 |
| LAC Family Ltd | Professional & scientific | 2022 |
| Lacey Simmons Limited | Professional & scientific | 1973 |
| Lactique Limited | Hospitality | 2025 |
| Lacuna Securities Ltd | Information & communication | 2017 |
| Lacy Lodge Bakery Ltd | Extraterritorial | 2021 |
| Lady Looker Events Ltd | Administrative & support | 2015 |
| Laererveronica Ltd | Information & communication | 2022 |
| Lagoinha Woking Church Limited | Other services | 2025 |
| Laila’S Beauty Room Limited | Other services | 2019 |
| Laister Consulting Services Limited | Professional & scientific | 2012 |
| Laithwaite Financial Services Limited | Financial services | 2003 |
| Laithwaite Holdings Ltd | Financial services | 2023 |
| Lakeside Carpentry Services Ltd | Construction | 2025 |
| Lakeside Engineering Ltd | Wholesale & retail | 2016 |
| Laleham Court (Woking)Association Limited | Households | 1961 |
| Lambert Scott Limited | Real estate | 1996 |
| Lambourne Close (Burpham) Management Company Limited | Households | 2019 |
| Lamorna Investments Ltd | Professional & scientific | 2023 |
| Landa Pictures Ltd | Information & communication | 2020 |
| Landhawk Software Services Limited | Information & communication | 2019 |
| Landlord Mortgage Claims Limited | Professional & scientific | 2021 |
| Landmark Care Homes Limited | Health & social care | 2014 |
| Lando Productions Ltd | Information & communication | 2024 |
| Landscape Software Limited | Information & communication | 2000 |
| Landseer View Ltd | Households | 2021 |
| Landster Holdings Ltd | Hospitality | 2019 |
| Lane & Wenden Limited | Administrative & support | 1979 |