| Jummy Green Ltd | Wholesale & retail | 2026 |
| Junaid Enterprises Private Ltd | Wholesale & retail | 2022 |
| JUNCT10N Industrial Park Management Company Limited | Real estate | 2003 |
| Junction Property Developments Ltd | Construction | 2013 |
| Juneberry Construction Ltd | Administrative & support | 2025 |
| Jungle Boogie Walsall Ltd | Hospitality | 2025 |
| Jungle Sports Limited | Professional & scientific | 2019 |
| Jungleland Investments Ltd | Real estate | 2024 |
| Junk OUT Ltd | Transport & logistics | 2025 |
| Jupiter Property Investments Limited | Administrative & support | 2007 |
| Jupiter Sage Ltd | Transport & logistics | 2026 |
| Juqbox Limited | Information & communication | 2018 |
| Just a Drink Limited | Hospitality | 2018 |
| Just BLV Ltd | Wholesale & retail | 2025 |
| Just Heat Solutions Ltd | Construction | 2025 |
| Just Renaults Limited | Wholesale & retail | 2013 |
| Just Rooms (Midlands) Ltd | Real estate | 2019 |
| Just Sensational Ltd | Wholesale & retail | 2021 |
| Just Tiffins Ltd | Hospitality | 2015 |
| Just Togs Limited | Wholesale & retail | 1983 |
| Just Veggie Ltd | Manufacturing | 2025 |
| Justand.P.K Ltd | Transport & logistics | 2012 |
| Justmove (Lettings) Limited | Real estate | 2011 |
| JW Brickwork and Groundwork Limited | Construction | 2021 |
| JW Construction Stoke Ltd | Construction | 2024 |
| JXT High Voltage Services Limited | Professional & scientific | 2025 |
| K & B Consulting Ltd | Professional & scientific | 2024 |
| K & I Goss Limited | Hospitality | 2019 |
| K & J Barbers Limited | Other services | 2003 |
| K & K Akhawat Estates Ltd | Real estate | 2026 |
| K & R Construction (Staffordshire) Ltd | Construction | 2022 |
| K & S Fencing Ltd | Construction | 2010 |
| K a F Travel Ltd | Administrative & support | 2022 |
| K a N Retail Limited | Real estate | 2021 |
| K and S Strategies Ltd | Professional & scientific | 2026 |
| K B Fleet Services Ltd | Wholesale & retail | 2015 |
| K Bogdan Transport Ltd | Transport & logistics | 2025 |
| K G Windows Limited | Construction | 2006 |
| K Guard International Limited | Manufacturing | 2005 |
| K Head 2019 Limited | Hospitality | 2019 |
| K Henry Properties Limited | Real estate | 2011 |
| K J Storage Limited | Other services | 2020 |
| K Jones Construction Specialist Limited | Construction | 2014 |
| K Majeed Limited | Transport & logistics | 2024 |
| K Makin Ltd | Construction | 2020 |
| K Pong Interiors Ltd | Construction | 2024 |
| K S Builder Walsall Ltd | Construction | 2023 |
| K S Investments (Midlands) Limited | Real estate | 2019 |
| K W W Consulting Limited | Administrative & support | 2015 |
| K Wall Builders Limited | Construction | 2018 |
| K&A Widlas Homes Ltd | Real estate | 2025 |
| K&H Properties & Investments Ltd | Real estate | 2023 |
| K-Bhol Ltd | Wholesale & retail | 2026 |
| K-Star MMA Ltd | Arts & recreation | 2019 |
| K. Cockbill Properties Limited | Construction | 1993 |
| K.B. Male Builders Limited | Construction | 2007 |
| K.B.M Khera's Building Management Ltd | Construction | 2017 |
| K.Engineering Company (West Bromwich) Limited | Manufacturing | 1954 |
| K.H.Potatoes Ltd | Wholesale & retail | 2020 |
| K.J.S. Services Limited | Administrative & support | 2002 |
| K.N.K. Brickwork Contractors Limited | Construction | 2005 |
| K.V.Subsea Ltd | Professional & scientific | 2018 |
| K2 Pizza Walsall Ltd | Hospitality | 2025 |
| K25 Auto Services Limited | Wholesale & retail | 2021 |
| K2F Ltd | Wholesale & retail | 2023 |
| K32 Hair Ltd | Other services | 2025 |
| K5 Health & Fitness Ltd. | Arts & recreation | 2019 |
| K9 Core Limited | Other services | 2019 |
| K9 Core Physio & Hydro Academy Ltd | Other services | 2025 |
| K9 Kitchen Walsall Ltd | Wholesale & retail | 2025 |
| K9 Patrol WM Limited | Administrative & support | 2025 |
| K9 Pawfection Ltd | Agriculture & fishing | 2021 |
| K9 Saif Ltd | Administrative & support | 2024 |
| K9&CO Ltd | Wholesale & retail | 2023 |
| KA Health Care 24/7 Ltd | Administrative & support | 2026 |
| KA Home Improvement Ltd | Construction | 2025 |
| KAB Investments Limited | Real estate | 2024 |
| Kafeneon Ltd | Extraterritorial | 2021 |
| Kahani Productions Ltd | Professional & scientific | 2025 |
| Kahn Motor Group Ltd | Wholesale & retail | 2025 |
| Kahn Property Group Ltd | Real estate | 2025 |
| Kaidrums Childcare Ltd | Health & social care | 2022 |
| Kaiizan Limited | Wholesale & retail | 2018 |
| Kairon Electrical Limited | Construction | 2025 |
| Kala Logistics Ltd | Transport & logistics | 2025 |
| Kalisz Ltd | Transport & logistics | 2018 |
| Kalmair Ltd | Construction | 2018 |
| Kalyan Commercial Limited | Hospitality | 2022 |
| Kalyan Property Ltd | Real estate | 2025 |
| KAM Square Ltd | Wholesale & retail | 2025 |
| Kambeel Ltd | Wholesale & retail | 2022 |
| Kamico Power Ltd | Manufacturing | 2023 |
| Kampong Bites UK Ltd | Hospitality | 2022 |
| Kamran Essentials Ltd | Wholesale & retail | 2025 |
| Kamu Properties Ltd | Real estate | 2023 |
| Kamu Technologies Sunderland Ltd | Manufacturing | 2025 |
| Kam’S Autos Ltd | Wholesale & retail | 2023 |
| Kandola Holdings Limited | Real estate | 2015 |
| Kandolas Build X Global Construction Ltd | Construction | 2024 |
| Kandybite Ltd | Manufacturing | 2025 |