| JCM Financial Planning Limited | Financial services | 2019 |
| Jcnh Holdings Limited | Manufacturing | 2017 |
| JCR Co Holdings Ltd | Wholesale & retail | 2021 |
| JCS Medical Services Ltd | Health & social care | 2022 |
| JCS Repairs Limited | Administrative & support | 2026 |
| JCT Consultancy Limited | Information & communication | 1998 |
| JCW Developments Ltd | Construction | 2024 |
| JCW Electrical Ltd | Professional & scientific | 2017 |
| JD Landscaping & Groundworks Limited | Administrative & support | 2015 |
| JD Nicholson Contracts Ltd | Professional & scientific | 2025 |
| JD Project Management Services Limited | Professional & scientific | 2015 |
| JD Tully Limited | Construction | 2023 |
| JD2E Ltd. | Information & communication | 2016 |
| JDB Management Consultancy Limited | Real estate | 2020 |
| JDC Engineering Ltd | Professional & scientific | 2024 |
| Jdezire Limited | Wholesale & retail | 2014 |
| JDP Cleaners Ltd | Administrative & support | 2017 |
| JDS Developments (Lincoln) Ltd | Construction | 2022 |
| JE Property and Consulting Limited | Construction | 2025 |
| Jeda Property Limited | Real estate | 2018 |
| Jeff Keen Building Services Limited | Construction | 2013 |
| Jefferson Asset Management Lincoln Limited | Financial services | 2024 |
| Jefferson Joinery Limited | Construction | 2019 |
| Jehrose Ltd | Wholesale & retail | 2025 |
| Jelson Security Ltd | Real estate | 2006 |
| JEM Fire Systems Ltd | Professional & scientific | 2016 |
| JEM UK Holdings Ltd | Financial services | 2021 |
| Jemcool Limited | Professional & scientific | 2018 |
| Jency Trading Ltd | Wholesale & retail | 2022 |
| Jenijeff Healthcare Limited | Administrative & support | 2015 |
| Jenny's Lincoln Limited | Real estate | 2016 |
| Jenson Developments Ltd | Arts & recreation | 2015 |
| Jepa Farming Ltd | Agriculture & fishing | 2025 |
| Jeremy Antscherl Ltd | Health & social care | 2017 |
| Jeremy Vincent Dawkins Ltd | Extraterritorial | 2024 |
| Jeremy Wetherall Properties Limited | Real estate | 2019 |
| Jericho Properties Limited | Administrative & support | 1984 |
| JES Foot Care Ltd | Health & social care | 2018 |
| Jesco Medical Services Limited | Administrative & support | 2024 |
| Jesse Thomas Innovation Ltd | Professional & scientific | 2025 |
| Jessica Firth-Brown Ltd | Professional & scientific | 2026 |
| Jessica Purdie Ltd | Wholesale & retail | 2024 |
| JET2 Joinery Ltd | Construction | 2024 |
| Jete Enterprise Limited | Wholesale & retail | 2020 |
| Jews House Restaurant Limited | Hospitality | 2006 |
| Jeyapalan Express Ltd | Wholesale & retail | 2024 |
| JF Foods Ltd | Wholesale & retail | 2026 |
| JG Construction (Lincoln) Limited | Construction | 2018 |
| JG Prints Limited | Professional & scientific | 2018 |
| JGG Automotive Limited | Wholesale & retail | 2026 |
| JGM Bulk Tipping Service Limited | Transport & logistics | 2021 |
| JGR Building Group Limited | Financial services | 2022 |
| JGR Building Services Limited | Construction | 2001 |
| JH Architectural & Construction Consultants Ltd | Professional & scientific | 2024 |
| JH O Distribution Ltd | Wholesale & retail | 2026 |
| JH Property Developments Ltd | Construction | 2023 |
| Jhkh Consulting Ltd | Health & social care | 2023 |
| Jifflr Limited | Information & communication | 2017 |
| Jigsaw Artist Management Limited | Information & communication | 2018 |
| Jigsaw Services Ltd | Information & communication | 2023 |
| Jijo MAT Limited | Real estate | 2023 |
| JIM Cowan Limited | Agriculture & fishing | 2014 |
| Jimmy Walker Football Ltd | Education | 2020 |
| Jivili Limited | Information & communication | 2005 |
| Jjdl (Grantham Street) Limited | Construction | 2016 |
| Jjdl Properties Limited | Real estate | 2018 |
| Jjla Limited | Construction | 2017 |
| Jjsa Holdings Ltd | Administrative & support | 2025 |
| Jjsa Relocations Global Ltd | Administrative & support | 2026 |
| Jjsa Relocations Ltd | Real estate | 2023 |
| JK Joinery Contractors Ltd | Construction | 2023 |
| JK Motor Group Ltd | Wholesale & retail | 2025 |
| Jk's Cafe (Lincoln) Limited | Hospitality | 2024 |
| JKB Traction Ltd | Transport & logistics | 2025 |
| JKN Surveys Limited | Construction | 2014 |
| JKS Civil Engineering (Lincoln) Limited | Construction | 2011 |
| JL Wraps Ltd | Professional & scientific | 2023 |
| JLC Plastering Lincoln Ltd | Construction | 2018 |
| Jlee Electrical Ltd | Construction | 2016 |
| JLH Logistics Ltd | Transport & logistics | 2022 |
| JLL Digital Limited | Professional & scientific | 2025 |
| JLO Solutions Limited | Administrative & support | 2012 |
| JM Brouwer (Property Services) Ltd | Real estate | 2018 |
| JM Event Productions Limited | Arts & recreation | 2025 |
| JM Heating Lincoln Ltd | Construction | 2019 |
| JM Lifting Services Ltd | Construction | 2024 |
| JM Lincoln Limited | Hospitality | 2025 |
| JM LOG Ltd | Wholesale & retail | 2016 |
| JM Unique Healthcare Limited | Health & social care | 2024 |
| JMA Risk Management Ltd | Administrative & support | 2022 |
| Jmaw Limited | Construction | 2013 |
| JMB Building & Construction Ltd | Construction | 2025 |
| JMB Properties (Lincoln) Limited | Real estate | 2024 |
| JMC Lincoln Ltd | Construction | 2020 |
| JMD Electrical Services Ltd | Construction | 2022 |
| JMF Deals Ltd | Wholesale & retail | 2022 |
| JMH Education Ltd | Education | 2025 |
| JMH Environmental Construction Limited | Construction | 2014 |
| JMO Consultancy Ltd | Health & social care | 2018 |
| JMT Paving Ltd | Construction | 2021 |