| JS Paving Ltd | Construction | 2017 |
| JS Performance Ltd | Manufacturing | 2011 |
| JS Projects (Lincoln) Limited | Construction | 2025 |
| JS Property Development (Lincoln) Ltd | Real estate | 2024 |
| JSE Property Ltd | Real estate | 2024 |
| JSM Safety Solutions Limited | Professional & scientific | 2015 |
| JSO Holdings Limited | Real estate | 2018 |
| Jspdoc Limited | Health & social care | 2022 |
| Jsro Limited | Wholesale & retail | 2010 |
| JST Homes Limited | Construction | 2020 |
| JT Developments (Lincoln) Ltd | Real estate | 2025 |
| JT Farm Holdings Limited | Agriculture & fishing | 2022 |
| JTA Homes Limited | Real estate | 2024 |
| Jtbooks.Com Ltd | Information & communication | 2009 |
| JTC Autos Limited | Wholesale & retail | 2010 |
| JTC Planning Limited | Professional & scientific | 2020 |
| Jtech Hub Limited | Wholesale & retail | 2025 |
| JTG Consultancy Limited | Professional & scientific | 2018 |
| JTM Services Lincoln Ltd | Health & social care | 2018 |
| Jtnokio Ltd | Real estate | 2023 |
| Jubb Engineering & Training Ltd | Administrative & support | 2014 |
| Jubb Property Ltd | Real estate | 2019 |
| Jubilee Hill Mortgages Ltd | Financial services | 2023 |
| Jubilee Park Management Co Ltd | Households | 2011 |
| Judith Stocker Ltd | Health & social care | 2017 |
| Judovka Limited | Transport & logistics | 2016 |
| Juice Sauz Distribution Limited | Manufacturing | 2018 |
| Juice Sauz Ltd | Manufacturing | 2015 |
| JULI2KE Ltd | Manufacturing | 2013 |
| Julia Stainforth Associates Ltd | Health & social care | 2019 |
| Julian Paul & SON Limited | Arts & recreation | 2011 |
| Julie a Blalock Ltd | Professional & scientific | 2023 |
| Jumping Paws Vetcare Limited | Professional & scientific | 2023 |
| Junior Care Services Ltd | Administrative & support | 2016 |
| Junkdup Limited | Other services | 2018 |
| Junttan UK Limited | Wholesale & retail | 2005 |
| Junxion Barbers Ltd | Other services | 2019 |
| Just Automotive Group Limited | Financial services | 2025 |
| Just Automotive Holdings Limited | Financial services | 2020 |
| Just Automotive Midco Ltd | Financial services | 2025 |
| Just Automotive Solutions Ltd | Wholesale & retail | 2003 |
| Just Bake IT Ltd | Manufacturing | 2024 |
| Just BEE Lincs Ltd | Health & social care | 2023 |
| Just Cars Repair Centre Ltd | Wholesale & retail | 2003 |
| Just Drill Ltd | Wholesale & retail | 2022 |
| Just My Motorhome Limited | Wholesale & retail | 2014 |
| Just Sell Your Car Limited | Wholesale & retail | 2024 |
| Just Wake Ltd | Administrative & support | 2011 |
| Justaudivw Limited | Wholesale & retail | 2011 |
| Justin Lawson Plumbing & Heating Limited | Construction | 2011 |
| Justme Logistics and Haulage Ltd | Transport & logistics | 2023 |
| Justme Waste and Recycling Ltd | Water & waste | 2025 |
| Justrack Property Limited | Real estate | 2023 |
| Juta Construction Ltd | Real estate | 2026 |
| JW Active Ltd | Education | 2025 |
| JW MOT Ltd | Wholesale & retail | 2025 |
| JW Project Consulting Limited | Professional & scientific | 2025 |
| JWB Transport Ltd | Transport & logistics | 2025 |
| JWC Accountancy Ltd | Professional & scientific | 2018 |
| JWR Barbers Ltd | Other services | 2026 |
| Jwren Properties Ltd | Other services | 2018 |
| JZ Haulage Ltd | Transport & logistics | 2022 |
| K & M Drylining and Interiors Ltd | Construction | 2020 |
| K & YM Scarborough Limited | Construction | 2002 |
| K - WIL Limited | Wholesale & retail | 2016 |
| K and R Properties Limited | Real estate | 2009 |
| K Butler Roofing Ltd | Construction | 2020 |
| K C Miller Engineering Services Limited | Professional & scientific | 2025 |
| K C Read Decorating Limited | Construction | 2012 |
| K C, L F & J W Braithwaite Limited | Agriculture & fishing | 2004 |
| K E Paving Limited | Construction | 2024 |
| K H a Wahab Frcs Ltd | Real estate | 2010 |
| K I C Computing Limited | Information & communication | 1995 |
| K J B Construction Limited | Construction | 2014 |
| K L T Property (Lincoln) Ltd | Real estate | 2018 |
| K LEE and Co Ltd | Professional & scientific | 2009 |
| K P Harris Medical Services Ltd | Health & social care | 2015 |
| K Stuart & Co Ltd | Health & social care | 2023 |
| K T Lindum Limited | Real estate | 2013 |
| K W Timmins & Sons Limited | Agriculture & fishing | 2009 |
| K&B Aggregates and Recycling Ltd | Water & waste | 2025 |
| K&K Management Limited | Other services | 2020 |
| K&Theat Ltd | Manufacturing | 2025 |
| K-Mark Integration Limited | Administrative & support | 2009 |
| K. Anderson Butchers Ltd | Wholesale & retail | 2007 |
| K.F. Everton Construction Limited | Construction | 2003 |
| K.G.W. Investments Limited | Real estate | 2005 |
| K.Tomlinson Ltd | Construction | 2025 |
| K1 Solutions (Lincoln) Limited | Professional & scientific | 2009 |
| K2 Developments Ltd | Construction | 2013 |
| K2 Renovations Ltd | Construction | 2025 |
| K4 UX Web Design Ltd | Professional & scientific | 2023 |
| K7 Autos Limited | Wholesale & retail | 2017 |
| KAB Haulage Ltd | Extraterritorial | 2025 |
| Kace Trans Logistic Engineers Ltd | Transport & logistics | 2012 |
| Kagi Dilan Ltd | Transport & logistics | 2023 |
| Kaleidacoat Limited | Other services | 2014 |
| Kali Khola Ltd | Hospitality | 2022 |
| Kalpa Alpaca Ltd. | Agriculture & fishing | 2023 |
| KAM Installations Ltd | Construction | 2015 |