| Hot and Spicy Burger Ltd | Hospitality | 2026 |
| Hourglass Environment Limited | Education | 2008 |
| Howarth Bros. Limited | Construction | 1989 |
| Howellsmithaccess Ltd | Construction | 2016 |
| Hoyles Coach & Transport Services Limited | Wholesale & retail | 1976 |
| Human Edge Development Ltd | Professional & scientific | 2024 |
| Humble Grove Ltd | Information & communication | 2017 |
| Hummingbird Property (Hebden Bridge) Limited | Real estate | 2021 |
| Hush Beauty & Aesthetics Limited | Other services | 2022 |
| Hydro Pressure Services Ltd | Professional & scientific | 2022 |
| I.D. Signs & Vehicle Graphics Limited | Professional & scientific | 2020 |
| Ifix TOD Ltd | Wholesale & retail | 2024 |
| Ignitedrive Ltd | Transport & logistics | 2019 |
| IMT Forever CIC | Other services | 2022 |
| Incredible Edible C.I.C. | Other services | 2009 |
| Industrial Supplies(Todmorden)Limited | Wholesale & retail | 1963 |
| Inglewood Property Lets Limited | Real estate | 2025 |
| Instelek Ltd | Energy | 2017 |
| Ipcommute Ltd | Information & communication | 2012 |
| ISG Developments (Northern) Limited | Construction | 2023 |
| ISH Security Limited | Administrative & support | 2016 |
| J & S Poultry Products Limited | Wholesale & retail | 2015 |
| J a F Design Print Ltd | Other services | 2020 |
| J Greenwood Properties Ltd | Real estate | 2011 |
| J Kendrick Mortgages Limited | Financial services | 2020 |
| J P Stansfield Limited | Agriculture & fishing | 2010 |
| J R Hall Limited | Manufacturing | 2007 |
| J. Jones & SON Building and Groundworks Contractor Limited | Construction | 2018 |
| J.A. Dennon Associates Limited | Wholesale & retail | 1964 |
| J.V.G. Electrical Services Limited | Construction | 2006 |
| J.W. Parker & SON Limited | Administrative & support | 1961 |
| Jays Fried Chicken and Desserts Todmorden Ltd | Hospitality | 2025 |
| JCK Cooperation Ltd | Wholesale & retail | 2021 |
| JCS Electrical Solutions Ltd | Construction | 2011 |
| JDF RS Limited | Construction | 2020 |
| Jeepers Sweepers Ltd | Administrative & support | 2024 |
| Jerome Mahon Photography Ltd | Extraterritorial | 2021 |
| JET Printing Ltd | Professional & scientific | 2020 |
| Jethro Myers Motion Graphics Ltd | Arts & recreation | 2018 |
| Jimmy Tippers Ltd | Administrative & support | 2015 |
| Jire Property Ltd | Real estate | 2025 |
| JJ English Ltd | Arts & recreation | 2026 |
| JJD Consult Ltd | Professional & scientific | 2020 |
| JLH Systems Limited | Professional & scientific | 2005 |
| JM & SK Holdings Ltd | Financial services | 2021 |
| Joinery Equipment (Hire) Ltd | Wholesale & retail | 2010 |
| Joint Venture Renewables Limited | Administrative & support | 2012 |
| JPR Building & Decorating Services Limited | Construction | 2023 |
| JPR Trading Limited | Construction | 2010 |
| JR Gallery Ltd | Wholesale & retail | 2024 |
| JRC Plant Limited | Manufacturing | 2008 |
| JSK Group Limited | Professional & scientific | 2000 |
| K Howarth Estates Ltd | Real estate | 2023 |
| Kaif Digital Trading Ltd | Other services | 2022 |
| Kavia Holdings Limited | Professional & scientific | 2002 |
| KEF Employment Ltd | Administrative & support | 2013 |
| Kerazycastles Ltd | Administrative & support | 2023 |
| Kettledrum Inn 1861 Limited | Hospitality | 2024 |
| Kevin Slattery Limited | Construction | 2013 |
| Kilnhurst Developments Limited | Real estate | 2017 |
| Kinri Ltd | Information & communication | 2026 |
| Kirsten Sander Limited | Wholesale & retail | 2008 |
| KLJ Plastering Services Limited | Construction | 2016 |
| Knowl END Farm 143 Ltd | Wholesale & retail | 2013 |
| Kusoma Training and Consultancy Ltd | Professional & scientific | 2022 |
| L Earnshaw Plastering and Rendering Limited | Construction | 2025 |
| L. P. Marine Limited | Manufacturing | 2018 |
| L.Dodsworth Creative Ltd. | Professional & scientific | 2022 |
| Lanaloves Ltd | Information & communication | 2025 |
| Lancashire Lavender Limited | Agriculture & fishing | 2021 |
| Laurence Miles Limited | Administrative & support | 2018 |
| Law Real Estate Limited | Real estate | 2016 |
| Leaminglyfalls Ltd | Transport & logistics | 2019 |
| Lerhema Cleaning Ltd | Administrative & support | 2024 |
| Lerhema Logistics Ltd | Transport & logistics | 2025 |
| Lerhema.Com Ltd | Wholesale & retail | 2024 |
| Let's Face Change Community Interest Company | Education | 2024 |
| LGW Consultancy Ltd | Professional & scientific | 2019 |
| Libertyfalls Ltd | Transport & logistics | 2019 |
| Libra Support Services Ltd | Health & social care | 2021 |
| Lightfoot Garden Landscapes Limited | Construction | 2018 |
| Lignose (Property Developments) Limited | Households | 1973 |
| Limitless Flow Coaching Limited | Other services | 2024 |
| Linatex Limited | Professional & scientific | 1930 |
| Linatex Rubber Limited | Extraterritorial | 1948 |
| Little Dog Security Ltd | Administrative & support | 2025 |
| Little Paws Locums Limited | Professional & scientific | 2018 |
| Little Steps Eco Management Limited | Construction | 2020 |
| Littleborough Construction Ltd | Construction | 2014 |
| Lloydsworth Ltd | Wholesale & retail | 2021 |
| London City Carpets Ltd | Wholesale & retail | 2020 |
| LOS Locos Ltd | Financial services | 2020 |
| Louise Lockhart Limited | Arts & recreation | 2018 |
| Love YOU Everydaisy Ltd | Wholesale & retail | 2025 |
| LOW Carbon Heat Limited | Wholesale & retail | 2019 |
| Lucidus IT Limited | Information & communication | 2014 |
| Luckwhistle Ltd | Wholesale & retail | 2019 |
| Lumbutts Water Board Limited | Administrative & support | 2026 |
| Lustraphone Limited | Manufacturing | 2023 |
| Lustraphone Transformers Limited | Manufacturing | 2023 |