| IMD CAD Services Ltd | Professional & scientific | 2002 |
| Impact Pro Clean Ltd | Administrative & support | 2024 |
| Impag (UK) Limited | Extraterritorial | 2011 |
| IN a Word - Awesome Ltd | Professional & scientific | 2020 |
| Induction Heat Treatments (Manchester) Limited | Manufacturing | 1970 |
| Infinite Perspective Consulting Ltd | Professional & scientific | 2016 |
| Ingham Design and Installation Limited | Construction | 2003 |
| Innovatronics Limited | Information & communication | 2005 |
| Inside OUT Day Nursery Ltd | Health & social care | 2021 |
| Inspired IT Limited | Information & communication | 1998 |
| Intelligent Improvement Ltd | Real estate | 2025 |
| International Gaming Events Ltd | Arts & recreation | 2021 |
| Into the Deep Ltd | Transport & logistics | 2018 |
| Intuitive Services Limited | Information & communication | 2015 |
| Invent Technology Ltd | Information & communication | 2011 |
| INX Systems Limited | Information & communication | 2025 |
| J Barker Construction Limited | Construction | 1996 |
| J C Motor Services Ltd | Wholesale & retail | 2006 |
| J Cross Accountancy Services Limited | Professional & scientific | 2025 |
| J Hopkin Haulage Ltd | Transport & logistics | 2015 |
| J M M Illustration Ltd | Professional & scientific | 2020 |
| J S S Farm Products Limited | Professional & scientific | 1991 |
| J&G Events Ltd | Hospitality | 2021 |
| J.E. Morten Limited | Manufacturing | 1976 |
| J.H.Thornley Limited | Construction | 1959 |
| Jack Massey Limited | Administrative & support | 2014 |
| Jack Pattison Construction Ltd | Construction | 2019 |
| Jackson Carpets Limited | Wholesale & retail | 1978 |
| Jacksons Windows Ltd | Construction | 2022 |
| Jacky & Jojoe's Ltd | Wholesale & retail | 2025 |
| JAI MAA Rajrajeshwari Ltd | Information & communication | 2026 |
| Jaidurga Limited | Hospitality | 2025 |
| Jalthar Enterprises Ltd | Wholesale & retail | 2024 |
| Jasnav Street Food Limited | Hospitality | 2019 |
| JBM Pilot Training Solutions Limited | Education | 2023 |
| JC Veterinary Services Limited | Professional & scientific | 2019 |
| JCR Invest Ltd | Professional & scientific | 2025 |
| Jdti Walters Ltd | Real estate | 2017 |
| JEC Professional Services Limited | Information & communication | 2010 |
| Jeremy Unsworth Funeral Services (New Mills) Limited | Administrative & support | 2011 |
| Jeremy Unsworth Funeral Services (WB) Limited | Other services | 2004 |
| Jessica MAY Design Limited | Professional & scientific | 2021 |
| Jetstar Exterior Cleaning Ltd | Administrative & support | 2024 |
| JJ Infotech Services Ltd | Information & communication | 2026 |
| JJ Tech Support Ltd | Other services | 2026 |
| JJS Garden and Maintenance Ltd | Administrative & support | 2012 |
| JKM Technologies Ltd | Manufacturing | 2004 |
| JM Training International Ltd | Education | 2019 |
| JMF Hospitality Limited | Hospitality | 2022 |
| JO Tamblyn & Co Ltd | Professional & scientific | 2022 |
| Joanna Brew Limited | Information & communication | 2010 |
| Jobe Developments Ltd | Construction | 2017 |
| JOE Dale Contracting Ltd | Construction | 2024 |
| John Crook Guiding Ltd | Arts & recreation | 2023 |
| John George Fine Cabinetry Limited | Manufacturing | 2016 |
| John Sweeney Projects Limited | Professional & scientific | 2009 |
| Joined UP Intelligence Limited | Information & communication | 2022 |
| Jojangles (High Peak) Ltd | Hospitality | 2017 |
| Jolley Productions Ltd | Professional & scientific | 2020 |
| JON Parker LEE Photography Limited | Professional & scientific | 2008 |
| Joseva Homes Limited | Real estate | 2006 |
| Joule Brady Car & Commercials Limited | Wholesale & retail | 2012 |
| Joule Brady Limited | Construction | 1999 |
| Joule Brady Properties Limited | Real estate | 2013 |
| Joule Brady Vehicle and Plant Hire Limited | Construction | 2005 |
| Joy JEN Studio Ltd | Wholesale & retail | 2013 |
| Joyce Kelly Associates Limited | Professional & scientific | 2007 |
| JP Autos (Brown Edge) Limited | Wholesale & retail | 2025 |
| JP Construction & Joinery Ltd | Construction | 2021 |
| JP Engineering (High Peak) Limited | Real estate | 2010 |
| Jpcj Limited | Arts & recreation | 2005 |
| JPR Legal Limited | Professional & scientific | 2016 |
| JS Burgess Engineering Limited | Manufacturing | 2003 |
| JTK Mini Cranes Ltd | Construction | 2024 |
| Jtkb Industrial Services Ltd | Administrative & support | 2025 |
| Juice Graphics Design & Print UK Ltd | Wholesale & retail | 2015 |
| Julie Preston Talent Search Limited | Administrative & support | 2025 |
| Just Renovation N/W Ltd | Construction | 2025 |
| Justcloudit Ltd | Information & communication | 2018 |
| K N Property Services Ltd | Construction | 2021 |
| K S Engineering Limited | Administrative & support | 2008 |
| K W Property Solutions Ltd | Construction | 2022 |
| K. Whittaker Limited | Construction | 2003 |
| K9 Timing Limited | Manufacturing | 2020 |
| Karnav Foods Ltd | Hospitality | 2023 |
| Kathrynroyle Ltd | Professional & scientific | 2026 |
| Kayestone Industrial a Ltd | Real estate | 2026 |
| KBS Employment Services Ltd. | Administrative & support | 2008 |
| KBS Financial Planning Ltd. | Financial services | 2006 |
| Kelsa Holdings Limited | Financial services | 2021 |
| Kelsa Truck Products Ltd | Manufacturing | 2003 |
| Kennedy & Sons Property Holdings Ltd | Real estate | 2022 |
| Kernel Mode Limited | Information & communication | 2019 |
| Ketroy Ltd | Transport & logistics | 2023 |
| Kevin Chaplin Joinery Ltd | Construction | 2007 |
| Kewnique Ltd | Construction | 2023 |
| Keystone Construction (NW) Limited | Construction | 2022 |
| Kgcl Limited | Financial services | 2025 |
| Kinder Furniture Limited | Manufacturing | 2018 |
| Kinder Mountain Rescue Team | Other services | 2006 |