| KR Property Group Ltd | Households | 2020 |
| KRO Holdings Limited | Administrative & support | 2012 |
| Krol Electric Ltd | Construction | 2023 |
| Krolsys Ltd | Information & communication | 2026 |
| Kronna Ltd | Wholesale & retail | 2025 |
| KS Project Management Services Ltd | Administrative & support | 2016 |
| KS Property Limited | Real estate | 2015 |
| KSZ Civils and Groundworks Ltd | Construction | 2024 |
| KTD Property Investment Ltd | Real estate | 2025 |
| Ktec Technologies Limited | Information & communication | 1992 |
| Kuba Capital Limited | Financial services | 2024 |
| Kulkare Limited | Health & social care | 2018 |
| Kumu Limited | Professional & scientific | 2023 |
| Kungfu Oriental Buffet Redditch Ltd | Hospitality | 2019 |
| Kustom Yard Ltd | Wholesale & retail | 2018 |
| Kwic Electrical Ltd | Manufacturing | 2025 |
| KWM Business Limited | Wholesale & retail | 2025 |
| KX Electrical Contractors Ltd | Construction | 2017 |
| Kx-Clusive Roofing Ltd | Construction | 2025 |
| Kyzen Media Limited | Wholesale & retail | 2014 |
| L & D Scaffolding (Redditch) Ltd | Construction | 2011 |
| L & E Carpentry & Flooring Ltd | Construction | 2026 |
| L & G Property Developments Ltd | Construction | 2025 |
| L Healy Holdings Limited | Professional & scientific | 2010 |
| L Healy Limited | Construction | 1983 |
| L J Refurbishments Specialists Ltd | Construction | 2025 |
| L Quinton Consultancy Services Limited | Water & waste | 2024 |
| L&Wv Investments Limited | Financial services | 2026 |
| L'Arc Medical Limited | Health & social care | 2024 |
| L. a. Glass Limited | Wholesale & retail | 2004 |
| L.J.A Home Sweet Home Ltd | Real estate | 2020 |
| L.M.E Construction Services Limited | Construction | 2022 |
| L.M.E Plumbing Limited | Construction | 2019 |
| L.P. Mcgrath Ltd | Construction | 2008 |
| L8 Holdings Limited | Financial services | 2025 |
| L8 Homes Ltd | Real estate | 2025 |
| L8 Risk Management Limited | Professional & scientific | 2017 |
| LA Bathroom Services Limited | Construction | 2016 |
| LA Brace Limited | Hospitality | 2026 |
| LA Electrics (Redditch) Ltd | Construction | 2014 |
| LA Lighting Limited | Professional & scientific | 2009 |
| LA Stegaru Limited | Wholesale & retail | 2018 |
| Labelrite Limited | Manufacturing | 2010 |
| Labuz Ltd | Wholesale & retail | 2025 |
| Ladbrooke 98 Holdings Ltd | Financial services | 2024 |
| Ladybird Cranes Limited | Construction | 1977 |
| Ladybird Group Limited | Administrative & support | 2003 |
| Ladybird Inns Limited | Hospitality | 1998 |
| Lake Chemicals and Minerals Limited | Wholesale & retail | 2001 |
| Lake Chemicals Trustees Limited | Professional & scientific | 2006 |
| Lake Cube Limited | Manufacturing | 2022 |
| Lakeside Industries Limited | Manufacturing | 2015 |
| Lakeside Management Co. Limited | Real estate | 1982 |
| Lakeside Service Centre Limited | Manufacturing | 2015 |
| Lakeside Special Products Limited | Manufacturing | 2001 |
| Lala Music Supervision Limited | Information & communication | 2026 |
| Lamaeva HR Ltd | Administrative & support | 2025 |
| Lamberts Estate Agents Limited | Real estate | 2020 |
| Lamberts Lettings Limited | Real estate | 2008 |
| Lamitech Design Limited | Construction | 2024 |
| Lamont Environmental Projects Limited | Construction | 1989 |
| Landcrab Owners Club International Limited | Arts & recreation | 2000 |
| Landmark Brands Limited | Wholesale & retail | 2016 |
| Landmark International Limited | Extraterritorial | 1999 |
| Landmark International Properties Limited | Real estate | 2004 |
| Landmark International Real Estate Limited | Extraterritorial | 2006 |
| Landon Kingsway Limited | Extraterritorial | 1985 |
| Landor Residents Association Limited | Households | 1974 |
| Landoscaping UK Ltd | Administrative & support | 2025 |
| Landsure Limited | Professional & scientific | 2019 |
| Lankies Refurb Limited | Wholesale & retail | 2014 |
| Lanzer Limited | Information & communication | 2007 |
| Lapwing Court Studley Management Company Limited | Real estate | 2021 |
| Larchglen Limited | Professional & scientific | 2010 |
| Larner Property Ltd | Real estate | 2017 |
| LAS Beauty Ltd | Other services | 2026 |
| Laser and Beauty by H Limited | Health & social care | 2024 |
| Laser CMR Ltd | Manufacturing | 2024 |
| Lash Group Ltd | Wholesale & retail | 2025 |
| Lashes by LIV Ltd | Other services | 2023 |
| Latham-Marr Group Limited | Administrative & support | 2018 |
| Lattie Limited | Real estate | 2026 |
| LAU & CHU Properties Ltd | Real estate | 2026 |
| Laurena Ltd | Wholesale & retail | 2025 |
| Lavin and Sons Construction Limited | Construction | 2003 |
| Lavin and Sons Developments Limited | Construction | 2026 |
| Lavin and Sons Holdings Limited | Financial services | 2026 |
| Lavin and Sons Plant Ltd | Construction | 2015 |
| Law Lettings & Property Services Limited | Real estate | 2026 |
| Lawfield Contracts Limited | Construction | 2008 |
| Lawrence Long Limited | Manufacturing | 1957 |
| Lawson & Rose Limited | Real estate | 2023 |
| Lawson Henley Group Limited | Construction | 2021 |
| Lawson Henley Limited | Construction | 2016 |
| Lawson Trading Unit 7 Ltd | Real estate | 2026 |
| Layer Industries Ltd | Wholesale & retail | 2023 |
| LB Roofing Services Limited | Construction | 2022 |
| LBB Bathrooms Ltd | Construction | 2019 |
| Lbug Consulting Limited | Professional & scientific | 2026 |
| Lcab Limited | Real estate | 2015 |