| Kevin Kearney Associates MII Limited | Professional & scientific | 2018 |
| KEW Yacht Charter Limited | Transport & logistics | 1995 |
| Kewb Capital Limited | Construction | 2018 |
| Keyes & Co Publishing Limited | Information & communication | 2026 |
| KG Coaching Ltd | Arts & recreation | 2023 |
| Kidderminster Gym Co Ltd | Arts & recreation | 2021 |
| Kiff MAC Limited | Information & communication | 2002 |
| King Packaging Systems Limited | Wholesale & retail | 2023 |
| Kingbird Limited | Construction | 2025 |
| Kingdom Business Ltd | Wholesale & retail | 2020 |
| Kingsgate Hill Limited | Households | 2008 |
| Kingsland Developments Limited | Construction | 2013 |
| Kingsmead Estate (Weybridge) Residents' Association Limited | Households | 1974 |
| Kingston Lane Coach House Limited | Real estate | 2020 |
| Kingston Lane Limited | Construction | 2019 |
| Kinsella Residents Limited | Administrative & support | 1999 |
| Kinsheron Developments Limited | Construction | 2015 |
| Kintsugi Holdings Ltd | Financial services | 2023 |
| Kirbas Ltd | Professional & scientific | 2018 |
| Kirichenko Consulting Ltd | Information & communication | 2013 |
| Kirsty Elizabeth Ltd | Professional & scientific | 2025 |
| Kitara - (Mduk) Limited | Arts & recreation | 2014 |
| Kitcattbowman LLP | | 2024 |
| Kizi Limited | Mining & quarrying | 2021 |
| Klef Entertainment Group Limited | Information & communication | 2021 |
| KM Hair Ltd | Other services | 2015 |
| Kmaysfx Limited | Information & communication | 2015 |
| KMC Limited | Administrative & support | 2005 |
| Kmts Limited | Professional & scientific | 2002 |
| Knobs & Keys Realtors Ltd | Real estate | 2020 |
| Koenig Holdings Limited | Financial services | 2022 |
| Koenig Packaging Systems Limited | Manufacturing | 2023 |
| Komax Ventures Limited | Professional & scientific | 2014 |
| Konga UK Ltd | Information & communication | 2021 |
| Korling Ltd | Wholesale & retail | 2015 |
| KPK Financial Consulting Limited | Professional & scientific | 2016 |
| KPK Studios Limited | Professional & scientific | 2024 |
| KRA Accountancy Services Ltd | Professional & scientific | 2020 |
| Kriss Stone Limited | Construction | 2008 |
| Krob Ltd | Real estate | 2021 |
| KT Property Management Ltd | Households | 2016 |
| KT12 Limited | Extraterritorial | 2007 |
| KT13BEYONDBEAUTY Limited | Other services | 2026 |
| KT9 Cooling Ltd | Other services | 2012 |
| Ktirion Property Limited | Real estate | 2020 |
| Kuco Limited | Information & communication | 2024 |
| Kumeka House Limited | Wholesale & retail | 2002 |
| KW Productions Ltd | Administrative & support | 2022 |
| KW Steward Limited | Professional & scientific | 2012 |
| Kyle Wells Racing Ltd | Arts & recreation | 2025 |
| Kynsell Consulting Limited | Professional & scientific | 2014 |
| Kysa Ventures Ltd | Real estate | 2023 |
| L & E Barbers Ltd | Other services | 2021 |
| L Burton Ltd | Financial services | 2024 |
| L Francis Services Limited | Professional & scientific | 2011 |
| L M Development Limited | Construction | 1998 |
| L T Designs Limited | Other services | 2006 |
| L&J Property Investment Limited | Real estate | 2017 |
| L. Bolger Air OPS Advisory Ltd | Professional & scientific | 2025 |
| L.A.D Building Contractors Limited | Construction | 2016 |
| L.P.Jones Motor Body Repairs Limited | Real estate | 1962 |
| L.S Rigging Ltd | Construction | 2021 |
| LA Casa Holdings Ltd | Financial services | 2020 |
| LA Casa Weybridge Limited | Hospitality | 1998 |
| LA LA Lands Creative Ltd | Information & communication | 2023 |
| LA Perle Aesthetics Ltd | Other services | 2023 |
| LA Petite Parisienne (1971) Limited | Real estate | 1971 |
| LA Residence Interiors Limited | Wholesale & retail | 2014 |
| Laigo BIO Limited | Professional & scientific | 2025 |
| Lakes and Greens Limited | Construction | 1995 |
| Lakeside Storage Ltd | Real estate | 2022 |
| Lakesville Publishing Limited | Information & communication | 2019 |
| Lakeswood Properties Limited | Real estate | 2000 |
| LAM Cosmetics Ltd | Wholesale & retail | 2018 |
| Lambrini Limited | Professional & scientific | 2000 |
| Landmark CE Holdings Limited | Financial services | 2021 |
| Landmark Civil Engineering Limited | Construction | 1998 |
| Landmark EOT Limited | Administrative & support | 2021 |
| Landmark Groundworks Limited | Construction | 1998 |
| Landmark Richmond Hill Limited | Construction | 1997 |
| Landview Surveyors Limited | Professional & scientific | 2020 |
| Landx Ltd | Administrative & support | 2023 |
| Lang Smith Limited | Real estate | 2017 |
| Langford Barton Investments Ltd | Real estate | 2024 |
| Langford RAE O'Neill Limited | Real estate | 2003 |
| Lanix (Holdings) Limited | Financial services | 2012 |
| Lanix UK Limited | Information & communication | 2003 |
| Lansdowne Place (High Beech) Management Limited | Hospitality | 2005 |
| Lantern Properties Limited | Construction | 2012 |
| Lara Digital Ltd | Professional & scientific | 2022 |
| Larchfield Close Management Limited | Households | 2011 |
| Lariatt Limited | Wholesale & retail | 2020 |
| Larino Design Consultancy Limited | Information & communication | 2002 |
| Laser Green Limited | Administrative & support | 2024 |
| Lasiro Limited | Administrative & support | 2010 |
| Latency Matters Ltd | Information & communication | 2017 |
| Later Means Never Ltd | Professional & scientific | 2024 |
| Latest (Weybridge) Limited | Administrative & support | 2002 |
| Latymer Management Limited | Administrative & support | 2009 |
| Laura Green Ltd | Manufacturing | 2018 |