| Kingsclere Limited | Administrative & support | 2022 |
| Kirkham Steel Erection Limited | Construction | 2019 |
| Kirstenbosch Limited | Health & social care | 2019 |
| Kitchen & Bedroom Hub Limited | Administrative & support | 2015 |
| Kitchen Craft (U.K.) Limited | Manufacturing | 1987 |
| KJD Business Services Ltd | Administrative & support | 2015 |
| KJF Holdings Ltd | Financial services | 2021 |
| KJM Carpentry & Construction Ltd | Construction | 2013 |
| KJM Legal Ltd | Professional & scientific | 2018 |
| KJS Networks Limited | Information & communication | 2016 |
| Klearco Ltd | Water & waste | 2026 |
| KLM Storage (Midlands) Limited | Administrative & support | 2007 |
| Knot and Grain Flooring Ltd | Manufacturing | 2018 |
| KNS Xpress Ltd | Transport & logistics | 2019 |
| Korach Musical Limited | Arts & recreation | 2020 |
| Kovacs Medical Ltd | Health & social care | 2010 |
| KOW Limited | Real estate | 2011 |
| Kozy Heating Limited | Construction | 2022 |
| Kpmj Limited | Manufacturing | 2022 |
| Krikler Services Limited | Professional & scientific | 2015 |
| Kudos Business Consultant Ltd | Professional & scientific | 2018 |
| Kular Enterprises Ltd | Administrative & support | 2016 |
| L Pearson Radiology Ltd | Health & social care | 2023 |
| L R N Properties Ltd | Real estate | 2013 |
| L&S Properties (Midlands) Limited | Real estate | 2022 |
| L.P.H Construction (Midlands) Ltd | Construction | 2021 |
| LA RUE Holdings Limited | Financial services | 2021 |
| LA RUE Investments Limited | Real estate | 2021 |
| LAB Builders Limited | Construction | 2022 |
| LAB Factor Limited | Wholesale & retail | 2016 |
| Labyrinth Developments Limited | Professional & scientific | 1990 |
| Lacey Properties Limited | Real estate | 2019 |
| Lach Associates Limited | Real estate | 2017 |
| Lakeside Adventures Ltd | Arts & recreation | 2024 |
| Lamont Projects Limited | Construction | 2000 |
| Land Flow Solutions Ltd | Professional & scientific | 2023 |
| Land Source Solutions Limited | Real estate | 2007 |
| Landmark Landscaping & Driveways Ltd | Administrative & support | 2025 |
| Landmark Midland Limited | Construction | 2006 |
| Landmarque Commercial Investments Ltd | Wholesale & retail | 2003 |
| Landseer Properties Dilwyn Limited | Real estate | 2021 |
| Langcrete UK Limited | Construction | 2015 |
| Langdell Administrative Services Limited | Administrative & support | 2012 |
| Langer Consulting Ltd | Health & social care | 2019 |
| Language Portal Ltd | Professional & scientific | 2025 |
| Lapwing Consulting Ltd | Administrative & support | 2015 |
| Lark Stoke Smiles Ltd | Health & social care | 2023 |
| Laser Templating Limited | Professional & scientific | 2020 |
| Lasercreative Ltd | Manufacturing | 2020 |
| Launch Limited | Professional & scientific | 2015 |
| Law & Co. Holdings Limited | Professional & scientific | 2020 |
| Law & Co. Properties Limited | Real estate | 2021 |
| Law Investments Limited | Real estate | 2020 |
| Lawn Gate Limited | Information & communication | 2026 |
| Lawton Construction Limited | Administrative & support | 2009 |
| LBC Homes Ltd | Real estate | 2025 |
| Lbjc Ltd | Information & communication | 2026 |
| Ldgd Property Limited | Real estate | 2021 |
| LDH Holdings Limited | Financial services | 2018 |
| LDM Holding Services Limited | Real estate | 2025 |
| LDM Holding Services Subco Ltd | Real estate | 2026 |
| LDM Spartans Limited | Real estate | 2024 |
| LDS Commerce Ltd | Wholesale & retail | 2026 |
| Leanai Holdings Ltd | Financial services | 2024 |
| Leave Management Limited | Information & communication | 2021 |
| Leaven Properties Group Limited | Real estate | 2021 |
| Leaven Properties Limited | Real estate | 2021 |
| LEE Russell Independent Funeral Directors Limited | Other services | 2022 |
| Legacymoto CIC | Education | 2020 |
| Legends Beauty Limited | Other services | 2016 |
| Lemonfool Ltd | Information & communication | 2019 |
| Lensgym Ltd | Administrative & support | 2024 |
| Lesmarty Ltd | Wholesale & retail | 2018 |
| Level 42 Holdings Limited | Administrative & support | 2020 |
| Level the Playing Field Limited | Administrative & support | 2015 |
| Lexington Investments Limited | Administrative & support | 2011 |
| LFJ Building Contractors Ltd | Construction | 2013 |
| LH Therapeutic Services Limited | Health & social care | 2024 |
| LI Accountants Ltd | Professional & scientific | 2024 |
| LI Mortgages & Protection Ltd | Financial services | 2026 |
| Libby Liburd Limited | Arts & recreation | 2024 |
| Libertine Burger Ltd | Wholesale & retail | 2016 |
| Liceo Investments Limited | Financial services | 2016 |
| Liceo Trading Limited | Real estate | 2019 |
| Light Whiskers Ltd | Arts & recreation | 2026 |
| Lightning Medical Limited | Manufacturing | 2025 |
| Lightron Services Ltd | Health & social care | 2014 |
| Lili Hauling&Gardening Ltd | Transport & logistics | 2025 |
| Lilley Bright Coaching Limited | Professional & scientific | 2025 |
| Lime Case Management Limited | Health & social care | 2022 |
| Lineholt Canines Ltd | Agriculture & fishing | 2026 |
| Linkgiants Ltd | Administrative & support | 2019 |
| Lisam Holdings Limited | Financial services | 2017 |
| Little Al's Kitchen Limited | Hospitality | 2021 |
| Little Lodge Farm Limited | Agriculture & fishing | 2002 |
| Little Mirror Productions Ltd | Administrative & support | 2020 |
| Livewire Developments Ltd | Real estate | 2023 |
| Living Bliss Limited | Real estate | 2020 |
| Living Freely Limited | Information & communication | 2024 |
| LJP Carpets and Flooring Limited | Wholesale & retail | 2018 |