| JON Lancaster Investment Services Ltd | Professional & scientific | 2008 |
| Jonathan Cook Forestry Services Limited | Agriculture & fishing | 2014 |
| Josscom Ltd | Wholesale & retail | 2023 |
| Jowett Car Club Limited | Other services | 2007 |
| JP Veterinary Services Limited | Professional & scientific | 2006 |
| JRN5353 Ltd | Professional & scientific | 2021 |
| JSB Hospitality Enterprises Ltd | Hospitality | 2019 |
| Judo Technologies Ltd | Information & communication | 2007 |
| Jules Aesthetics Boutique Ltd | Health & social care | 2017 |
| Julia Rouge Ltd. | Wholesale & retail | 2023 |
| Just Dance Floors Ltd | Administrative & support | 2025 |
| Justec Ltd | Information & communication | 2018 |
| JW Motorsport Limited | Arts & recreation | 2024 |
| K & M Properties 24 Ltd | Real estate | 2024 |
| K C Carpets Limited | Wholesale & retail | 2003 |
| K W Boulton Fencing Limited | Administrative & support | 2008 |
| K W Boulton Tree Care Specialists Limited | Agriculture & fishing | 2006 |
| K&S Trading Ltd | Hospitality | 2026 |
| Karl Kertess Ltd | Wholesale & retail | 2008 |
| Karter Holdings Limited | Professional & scientific | 2020 |
| KB Heating & Plumbing Ltd | Construction | 2026 |
| Keetley Holdings Limited | Real estate | 1994 |
| Keevil & Co Properties Ltd | Real estate | 2020 |
| Kemsing Publishing Limited | Information & communication | 2011 |
| KEN Tallis Foods Pershore Limited | Wholesale & retail | 2020 |
| KEN Tallis Properties Ltd | Real estate | 2015 |
| Kerara (Holdings) Limited | Real estate | 2010 |
| Keyfresh IT Limited | Information & communication | 2018 |
| Keys Chiropractic Limited | Health & social care | 2024 |
| Keyscape Design & Construction Limited | Construction | 2000 |
| Keystone Projects Limited | Professional & scientific | 1999 |
| Kiki Mimi Ltd | Wholesale & retail | 2025 |
| Kinahan Fencing & Groundworks Limited | Administrative & support | 2010 |
| Kingdom Automotive Solutions Limited | Professional & scientific | 2014 |
| Kingskerswell Developments Limited | Construction | 1998 |
| Kingston Canines Dog Care Limited | Other services | 2025 |
| Kirkgunzeon Ltd | Administrative & support | 2022 |
| KK Wilde Ltd | Transport & logistics | 2022 |
| KKE Architects Limited | Professional & scientific | 2008 |
| Klaxieth Ltd | Transport & logistics | 2023 |
| KM UK Business Group Ltd | Financial services | 2020 |
| KM Worldwide Family Investments Ltd | Financial services | 2019 |
| KMF Ventures Limited | Real estate | 2026 |
| Knowbury Farmers Ltd | Agriculture & fishing | 2021 |
| Knowinghothoof Ltd | Administrative & support | 2020 |
| Kommandur Ltd | Administrative & support | 2019 |
| KRL Trading Ltd | Manufacturing | 2016 |
| Kuhijora Ltd | Wholesale & retail | 2019 |
| Kunis Ltd | Wholesale & retail | 2019 |
| KW Supply Chain & Logistics Ltd. | Transport & logistics | 2014 |
| L & D Finance Limited | Financial services | 2025 |
| L a & AM Preston Ltd | Real estate | 2010 |
| Ladray Ltd | Wholesale & retail | 2019 |
| Lady Muck Limited | Extraterritorial | 2002 |
| Lagdrive Ltd | Administrative & support | 2018 |
| Lakeview Fire+ Ltd | Financial services | 2026 |
| Lama Solutions Limited | Manufacturing | 2024 |
| Lapwing Holdco Ltd | Financial services | 2019 |
| Lapwing UK. Ltd | Wholesale & retail | 2013 |
| Laser Surveys Trust Limited | Other services | 2022 |
| Lavishpetal Ltd | Administrative & support | 2019 |
| Lavkiore Ltd | Administrative & support | 2024 |
| Layton Workspaces Ltd | Administrative & support | 2026 |
| Leading to Success Ltd | Professional & scientific | 2013 |
| Leafroads Ltd | Wholesale & retail | 2019 |
| LED Roofing and Leadwork Limited | Construction | 2020 |
| Leeways Roofing and Cleaning Ltd | Administrative & support | 2024 |
| Leisure Mart Limited | Wholesale & retail | 2016 |
| Leopardworks Ltd | Administrative & support | 2019 |
| Lestament Ltd | Wholesale & retail | 2018 |
| Level Five Limited | Information & communication | 2003 |
| Lexmith Services Limited | Real estate | 1961 |
| Lgdh Limited | Real estate | 2022 |
| Lhmtransport Ltd | Transport & logistics | 2026 |
| Lianorin Ltd | Wholesale & retail | 2018 |
| Libertywealthstarters Ltd | Wholesale & retail | 2019 |
| Lighthook Ltd | Wholesale & retail | 2018 |
| Limelite Photobooths Limited | Professional & scientific | 2016 |
| Lincoln House Dental Practice Limited | Health & social care | 2011 |
| Line of Sight Communications Ltd | Information & communication | 2016 |
| Lintels Surveyors Ltd | Professional & scientific | 2024 |
| Little Acre Lettings Ltd | Hospitality | 2024 |
| Livestockex Limited | Wholesale & retail | 2024 |
| Livwell Health Limited | Education | 2019 |
| LJ Bradford Ltd | Transport & logistics | 2021 |
| LJB Advisory Services Ltd | Financial services | 2023 |
| LJP Events Consultancy Ltd | Hospitality | 2022 |
| Lloyd Compliance Ltd | Health & social care | 2023 |
| Logika Limited | Other services | 2019 |
| Lokey Accountancy Limited | Professional & scientific | 2018 |
| Long Shot Stables Ltd | Agriculture & fishing | 2019 |
| Loughborough Industrial Holdings Limited | Professional & scientific | 1989 |
| Loughborough Industrial Securities Limited | Real estate | 1973 |
| Lourro Ltd | Hospitality | 2019 |
| Lovers' Orchard Galleries and Gifts Ltd | Wholesale & retail | 2012 |
| LOW Westwood Ltd | Administrative & support | 2021 |
| Lowena Woodlands Limited | Real estate | 2023 |
| Lower Soar Residents Limited | Hospitality | 1989 |
| Lozla Ltd | Hospitality | 2019 |
| Luca Wine Limited | Wholesale & retail | 2017 |