| KGP (Rowhedge) Management Company Limited | Real estate | 2017 |
| Kids and Family Cycles Limited | Wholesale & retail | 2008 |
| Kids Life Studio Ltd | Education | 2024 |
| Kiln Road (Thundersley) Management Company Limited | Households | 2013 |
| Kineton Meadows Management Company Limited | Households | 2015 |
| Kingfisher Court Residents Company Limited | Households | 2001 |
| Kingfisher Green (Rainham) Management Company Limited | Households | 2022 |
| Kingfisher Rise Management Company Limited | Households | 2011 |
| Kingley Gate (Littlehampton) Management Company Limited | Households | 2014 |
| Kings Chase Residents Management Company Limited | Households | 2018 |
| Kings Court Residents RTM Company Limited | Households | 2009 |
| Kings Gate (Ascot) Management Company Limited | Households | 1996 |
| Kings Heath Exeter Management Company Limited | Households | 2005 |
| Kings House (Wichelstowe) Management Company Limited | Households | 2022 |
| Kings Mews (Frimley Green) Resident Management Company Limited | Households | 2004 |
| Kingsbere Gardens Freehold Management Company Limited | Households | 1990 |
| Kingsbury Grange (EA) Management Company Limited | Households | 2008 |
| Kingscourt Bridgwater Limited | Real estate | 2006 |
| Kingsland Gate Management Company Limited | Households | 2019 |
| Kingsland High Street Management Company Limited | Households | 2014 |
| Kingsley Court (Kerensa Gardens) Management Company Limited | Real estate | 2023 |
| Kingsley Court (Walton-On-Thames) Limited | Households | 2001 |
| Kingsley Place at Barnack Management Company Limited | Households | 2018 |
| Kingsley Square Limited | Households | 2010 |
| Kingslodge (Hatfield) Management Company Limited | Households | 2021 |
| Kingswood (Poynton) Residents Management Company Limited | Households | 2020 |
| Kingswood Heath (Colchester) Management Company Limited | Households | 2016 |
| Kingswood Park (Biddenham) Management Company Limited | Households | 2015 |
| Kingswood Renovations Ltd | Construction | 2025 |
| Kinnard Transport Limited | Other services | 2019 |
| Kipling Park Management Company Limited | Households | 1990 |
| Kirk Property (ELY) Limited | Real estate | 2017 |
| Kirk Property Limited | Real estate | 2017 |
| KJ Consulting Healthcare Limited | Professional & scientific | 2020 |
| KJC Distributions Ltd | Wholesale & retail | 2026 |
| Knighton Park (Flats and Maisonettes) Management Company Limited | Households | 1976 |
| Knighton Park (New Milton) Management Company Limited | Households | 1975 |
| Knights Field Management (NO 4) Limited | Households | 1995 |
| Knights Park (Watton) Management Company Limited | Households | 2017 |
| Knights View (Langold) Management Company Limited | Households | 2022 |
| Knights Wood (Apartments) Management Company Limited | Real estate | 2018 |
| Knights Wood Management Company Limited | Real estate | 2015 |
| Knightsbridge Place (Northampton) Residents Association Limited | Households | 2004 |
| Knightwood Court Management Company Limited | Households | 1983 |
| Komplete Karbon Limited | Manufacturing | 2021 |
| KR Alton Management Company Limited | Households | 2020 |
| KS Pumps Ltd | Construction | 2015 |
| Kudos Business Development Limited | Professional & scientific | 2010 |
| Kutchenhaus New Milton Ltd | Wholesale & retail | 2025 |
| L B & a B Holdings Limited | Construction | 2019 |
| L Bampton Developments Limited | Real estate | 2018 |
| L'Arte (New Milton) Limited | Hospitality | 2025 |
| LA Vinci Hair&Beauty Lounge GX Ltd | Other services | 2016 |
| Laithwaite Gardens (Sutton) Managing Company Limited | Professional & scientific | 2019 |
| Lake Corner Management Company Limited | Households | 2006 |
| Lakelands (M.K.) Management Limited | Households | 1989 |
| Lakeside Parkway Management Company Limited | Households | 2008 |
| Landscape Transformations Limited | Administrative & support | 2002 |
| Langwith Junction Management Company Limited | Households | 2013 |
| Lansdowne House (Residents Association) Limited | Households | 1992 |
| Lark View (Thetford) Residents Association Limited | Households | 2008 |
| Larkswood (Newton Leys) Management Company Limited | Households | 2010 |
| Latham Park (Oundle) Management Company Limited | Households | 2008 |
| Latimer Square (Oldbury) Management Company Limited | Households | 2008 |
| Lavish Royals Limited | Wholesale & retail | 2024 |
| Lawnswood Ride (Phase 2) Management Company Limited | Households | 2008 |
| Lawnswood Ride (Phase 3) Management Company Limited | Households | 2008 |
| Lawson Place Management Company Limited | Households | 2008 |
| Laydon Properties Limited | Real estate | 2003 |
| LCP Electrical Limited | Other services | 2019 |
| LE Cake Shop Ltd | Hospitality | 2024 |
| Leaf Cleaning Services Ltd | Administrative & support | 2026 |
| Leather Medic Ltd | Manufacturing | 2003 |
| Lestone Mews Management Company Limited | Households | 2019 |
| Let's Accommodate Limited | Real estate | 2001 |
| Lever Brickwork Limited | Construction | 2015 |
| Leverton Court Management Limited | Households | 1973 |
| Leverton Gate (Gloucester) Management Company Limited | Households | 2004 |
| Lewcas Limited | Wholesale & retail | 2016 |
| Liberty Green (Hawkinge) Management Company Limited | Households | 2007 |
| Liberty Park (Swindon) Management Company Limited | Households | 2015 |
| Life Studio for Kids UK Ltd | Administrative & support | 2011 |
| LIFELINE24 Limited | Health & social care | 2013 |
| Lime Tree Walk (Apley) Management Company Ltd | Households | 2018 |
| Limited Access Crane Hire Ltd | Construction | 2025 |
| Linda Vista Flats Limited | Real estate | 1967 |
| Lindum Point Management Company Limited | Households | 2005 |
| Linear Storage (South West) Limited | Extraterritorial | 2011 |
| Linmere (Houghton Regis) Residents Management Company Limited | Households | 2021 |
| Lion Mews Residents Freehold Limited | Households | 2014 |
| Lion Mews Residents Limited | Households | 2004 |
| Lion Mills (EA) Management Company Limited | Households | 2008 |
| Liskerrett (Liskeard) Management Limited | Households | 2008 |
| Listello Buildings Management Company Limited | Real estate | 2014 |
| Little Acorns Nursery (New Milton) Limited | Health & social care | 2023 |
| Little Meadows Management Company Limited | Households | 2016 |
| Little Trees Pre-School Limited | Education | 2010 |
| Little Wellthorpe Management Company Limited | Households | 2010 |
| Littlecombe (Block 1) Management Company Limited | Households | 2021 |
| LJ Ideal Properties Limited | Real estate | 2023 |