| John Hurst Limited | Extraterritorial | 1999 |
| John O'Driscoll Locums Limited | Health & social care | 2020 |
| John Owens Estate Planning Services Limited | Professional & scientific | 2014 |
| John Pooley Consultancy Ltd | Professional & scientific | 2007 |
| John Raymond Design Limited | Construction | 2002 |
| John Robinson Painter Limited | Construction | 2021 |
| John Samuel Limited | Real estate | 1980 |
| John West Construction Limited | Construction | 2003 |
| Johnnie Johnson Developments Limited | Construction | 1999 |
| Johns Square Limited | Administrative & support | 1998 |
| Johnson’S Same Day Ltd | Transport & logistics | 2025 |
| Johnston Legal Consulting Limited | Professional & scientific | 2018 |
| Joleann Limited | Financial services | 2024 |
| Joley Holding Limited | Financial services | 2015 |
| Jolly Juniors Ltd | Wholesale & retail | 2024 |
| Jolly Property Group Ltd | Real estate | 2025 |
| Jolly Roger Brewery Ltd | Hospitality | 2015 |
| JON Tainton Limited | Real estate | 2014 |
| Jonathan Morton Consultancy (2026) Limited | Professional & scientific | 2026 |
| Jonathan Morton Consultancy Limited | Professional & scientific | 2024 |
| Jones and Gough Electrical Limited | Wholesale & retail | 1977 |
| Jones Forestry Ltd | Agriculture & fishing | 2019 |
| Jones on the Go Ltd | Administrative & support | 2026 |
| Jopan Groups Limited | Health & social care | 2021 |
| Jor-El Ltd | Administrative & support | 2018 |
| Joseph Laugher International Risk Management Ltd | Administrative & support | 2023 |
| Joule Sustainable Energy Solutions Ltd | Energy | 2021 |
| Joule White Limited | Financial services | 2026 |
| Journey Hair & Beauty Ltd | Other services | 2018 |
| Joys Business Trade and Management Ltd | Professional & scientific | 2025 |
| JP Dunn Ltd | Real estate | 2012 |
| JP Legal Ltd | Professional & scientific | 2021 |
| JP Medi Ltd | Health & social care | 2022 |
| Jp&A Investments Ltd | Real estate | 2023 |
| JPE Share Limited | Administrative & support | 2021 |
| JPF Concepts Limited | Construction | 2013 |
| Jphl Joinery Limited | Manufacturing | 2010 |
| JPP Construction Services Limited | Professional & scientific | 2019 |
| JPW Building Ltd | Construction | 2020 |
| JRH Commercial Repairs Ltd | Wholesale & retail | 2021 |
| JS & JS Property Ltd | Real estate | 2025 |
| JS Build Management Ltd | Construction | 2024 |
| JSB Inns Ltd | Hospitality | 2014 |
| JSC Rotational Holdings Ltd | Financial services | 2022 |
| Jscapes Gardening & Landscaping Limited | Administrative & support | 2025 |
| Jsell Ltd | Wholesale & retail | 2025 |
| JSK Medical Ltd | Health & social care | 2009 |
| JSM Lettings Limited | Real estate | 2024 |
| JT Contract Consultancy Ltd | Construction | 2025 |
| JT Holdings (Worcester) Limited | Hospitality | 2022 |
| JT Properties (Worcester) Limited | Real estate | 2016 |
| JT Property Ltd | Real estate | 2017 |
| JT Woods Limited | Professional & scientific | 2011 |
| Jtdaf Ltd | Arts & recreation | 2025 |
| Jteq Limited | Information & communication | 1997 |
| Jtfom UK Ltd. | Construction | 2019 |
| JTR Pharma Ltd | Extraterritorial | 2025 |
| JTS Development & Management Ltd | Real estate | 2022 |
| Jubilee Resources Ltd | Hospitality | 2023 |
| Judith Kenney Limited | Professional & scientific | 2012 |
| Julian Tarran Groundworks Limited | Construction | 2007 |
| Julie Lawlor and Associates Ltd. | Health & social care | 2012 |
| Julie Peters Design Limited | Wholesale & retail | 2016 |
| Julya Beauty Ltd | Other services | 2026 |
| Junction Quarters Ltd | Real estate | 2024 |
| Jungle Cat Properties Limited | Hospitality | 2018 |
| Juniper ASH Ltd | Administrative & support | 2015 |
| Juniper Black Ltd | Administrative & support | 2019 |
| Juniper Services Ltd | Other services | 2015 |
| Jupiter DRY Cleaners Ltd | Other services | 2017 |
| Jurassic Jungle Golf Limited | Arts & recreation | 2023 |
| Just Events Catering Limited | Hospitality | 2007 |
| Just IN2 Carpets and Rugs Ltd | Wholesale & retail | 2010 |
| Just Leads Limited | Information & communication | 2025 |
| Just One Thought Ltd | Health & social care | 2007 |
| Just the JOB Mate Ltd | Construction | 2021 |
| JUST4YOU Logistics Ltd | Transport & logistics | 2023 |
| JVM Castings (Worcester) Limited | Manufacturing | 2006 |
| JVM Castings Limited | Professional & scientific | 1992 |
| JW & SJ Properties Ltd | Real estate | 2018 |
| JW Pugh Farming Limited | Agriculture & fishing | 2018 |
| JW Systems Limited | Information & communication | 2025 |
| Jwdmedia Ltd | Professional & scientific | 2023 |
| Jxcobtribe Limited | Administrative & support | 2024 |
| Jyoti's Odyssey Ltd | Administrative & support | 2025 |
| K & B Contracting Limited | Construction | 2020 |
| K and K Baxter Limited | Health & social care | 2003 |
| K D Property Services Ltd | Construction | 2019 |
| K W Warner Limited | Wholesale & retail | 2010 |
| K-Mv Comms Ltd | Arts & recreation | 2024 |
| K.W Wolf Ltd | Transport & logistics | 2015 |
| K2 Defence Limited | Professional & scientific | 2010 |
| K2 Owners Company Limited | Administrative & support | 2013 |
| K2Y Investment Ltd | Real estate | 2025 |
| Kabaddi Club (RKC) Ltd | Wholesale & retail | 2024 |
| Kaico International Ltd | Wholesale & retail | 2017 |
| Kalma Hair Studio Ltd | Other services | 2020 |
| KAM Cars Worcester Ltd | Wholesale & retail | 2017 |
| Kames Properties Limited | Construction | 2014 |
| Kancelaria Prawna Ltd | Information & communication | 2019 |