| JG Commercial Services Limited | Professional & scientific | 2024 |
| JH Consultants Ltd | Professional & scientific | 2014 |
| Jimmy's (Toft Green) Limited | Hospitality | 2021 |
| Jimmy’S Ancoats Limited | Hospitality | 2016 |
| Jimmy’S Northern Quarter Limited | Administrative & support | 2018 |
| JLS Training and Assessments Ltd | Education | 2014 |
| JMA Trading Ltd | Wholesale & retail | 2023 |
| Jodie Heap Properties Ltd | Real estate | 2024 |
| Joet Homes Ltd | Real estate | 2023 |
| John & Wendy Ltd | Hospitality | 2021 |
| John Baynes,Limited | Manufacturing | 1905 |
| John Lloyd Heywood Limited | Construction | 1978 |
| Johnson’S of Bury Ltd | Construction | 2018 |
| Jonathan James Lettings & Property Management Limited | Real estate | 2014 |
| Jorch Properties Ltd | Real estate | 2024 |
| Jost (Great Britain) Limited | Wholesale & retail | 1969 |
| Jovid GAS Services Ltd | Construction | 2024 |
| Joyama Homes Ltd | Real estate | 2025 |
| JPC Renovations Limited | Construction | 2024 |
| JPW Fulfilment Ltd | Wholesale & retail | 2024 |
| JR1 Limited | Other services | 2021 |
| JRL Logistics Limited | Wholesale & retail | 2024 |
| Jsmt Holdings Limited | Professional & scientific | 2015 |
| Juke of Wellington (Heywood) PUB Ltd | Hospitality | 2019 |
| Julio's Italian Restaurant Limited | Hospitality | 2006 |
| Junair Spraybooths Limited | Manufacturing | 1994 |
| Jungle Wood Ltd | Manufacturing | 2026 |
| Jusp Holdings Limited | Professional & scientific | 2020 |
| Justine Noon Ltd | Health & social care | 2011 |
| Juxin Takeaway Ltd | Hospitality | 2025 |
| K - Mindset Limited | Health & social care | 2025 |
| K - Mindset Ventures Limited | Health & social care | 2025 |
| K G Heywood Ltd | Wholesale & retail | 2020 |
| K&K Plumbing Limited | Construction | 2025 |
| K&N Greek Souvlaki Taste Limited | Hospitality | 2023 |
| K&T Hospitality Limited | Hospitality | 2025 |
| Kaberry Construction Limited | Construction | 1991 |
| Kalar Aesthetics Training Academy Ltd | Other services | 2018 |
| KAM Payroll Ltd | Administrative & support | 2025 |
| Kapp (NW) Ltd | Education | 2026 |
| Karisari Ltd | Manufacturing | 2025 |
| Kashmir Star Fried Chicken Ltd | Hospitality | 2020 |
| Kayenn Group Ltd | Wholesale & retail | 2024 |
| KCR Civils Limited | Construction | 2023 |
| KD Electrical Services & Contractors Ltd | Construction | 2015 |
| Kelkar Foods Limited | Manufacturing | 2024 |
| Kelliek Trading Ltd | Wholesale & retail | 2025 |
| Kelly & Knight Projects Ltd | Professional & scientific | 2012 |
| Kematim Concepts Ltd | Wholesale & retail | 2023 |
| KEN Rostron Builders Ltd | Administrative & support | 2005 |
| Kenect Recruitment (Transport) Limited | Administrative & support | 2020 |
| Kenyon Property Maintenance Limited | Construction | 2024 |
| Kenyon Roofing & Building Services Limited | Construction | 2024 |
| Keridam Ltd | Information & communication | 2025 |
| Keystone Design Build Maintain Ltd | Manufacturing | 2020 |
| KGN Property Limited | Real estate | 2022 |
| Khawaja Innovations Ltd | Wholesale & retail | 2026 |
| KI Capital Investments Ltd | Financial services | 2024 |
| KIA Property Management Ltd | Real estate | 2024 |
| Kieran Farrell the People's Gym Ltd | Arts & recreation | 2013 |
| Kiki Beauty Salon Limited | Other services | 2025 |
| Kinan K9 Service Ltd | Administrative & support | 2025 |
| Kinza Make-Up Academy Ltd | Other services | 2014 |
| Kitchen 4 Limited | Hospitality | 2025 |
| Kitchen Sockets Limited | Manufacturing | 2011 |
| Kmpd Limited | Construction | 2003 |
| Kobak Construction Limited | Construction | 2014 |
| Koyna Limited | Manufacturing | 2024 |
| KPR Engineering Services Ltd | Construction | 2023 |
| Kristjan Property Investments Ltd | Real estate | 2025 |
| Krupspark Tech Ltd | Information & communication | 2025 |
| KSJ Contracts Limited | Administrative & support | 2021 |
| L & S Support Limited | Health & social care | 2023 |
| LA Taverna Ltd | Hospitality | 2019 |
| Laarinka Ltd | Information & communication | 2022 |
| Lali's Pizza Limited | Hospitality | 2021 |
| Lamec Ltd | Construction | 2015 |
| Lamric Engineering & Fabrication Company Limited | Manufacturing | 2002 |
| Lancashire Borough Estates Ltd | Real estate | 2026 |
| Lancashire Electric Lamp Company Limited | Wholesale & retail | 1969 |
| Lancashire Holdings Limited | Construction | 1980 |
| Lancashire Kitchens and Bathrooms Limited | Construction | 2023 |
| Lancs Real Estate Ltd | Real estate | 2026 |
| Laser by JMH Ltd | Other services | 2025 |
| Lawson Shopfitters Limited | Construction | 2007 |
| Lawton Heating Limited | Construction | 2004 |
| LEE Debono Contracts Limited | Administrative & support | 2017 |
| Leefloorworks Ltd | Construction | 2025 |
| Lemmak Limited | Health & social care | 2019 |
| Lemon & Mccarthy & Associates Limited | Education | 2006 |
| Lemon Pizza Ltd | Hospitality | 2025 |
| Lenxit Z Ltd | Wholesale & retail | 2023 |
| LES Ceilings Ltd | Construction | 2012 |
| LF Horseboxes Ltd | Manufacturing | 2016 |
| Liberty Autos Ltd | Wholesale & retail | 2023 |
| Liberty Tech Solutions Limited | Wholesale & retail | 2023 |
| Libra Imports Limited | Wholesale & retail | 2018 |
| Life Kitchen Components Ltd | Manufacturing | 2017 |
| Life Without Stress Limited | Real estate | 2025 |
| Lineage Gloucester Limited | Manufacturing | 2007 |