| Kerb Appeal Clean Limited | Administrative & support | 2026 |
| Kerfoots(Portmadoc)Limited | Real estate | 1951 |
| Keyed UP Training Limited | Education | 2012 |
| Keystone Digital Group Ltd | Wholesale & retail | 2025 |
| Khanom's & Miah's Limited | Real estate | 2017 |
| Khaw Property Ltd | Real estate | 2018 |
| KHB Bakery Limited | Manufacturing | 2015 |
| Kinara Camber Limited | Hospitality | 2021 |
| Kingmill Properties Limited | Extraterritorial | 1960 |
| Kiss My Art Ltd | Arts & recreation | 2023 |
| Kiss My Holding Ltd | Real estate | 2026 |
| KJ Assistance Ltd | Administrative & support | 2021 |
| Klbfacades Ltd | Construction | 2024 |
| KM25 Limited | Professional & scientific | 2016 |
| KMA Property and Investments Ltd | Real estate | 2022 |
| KMM Property Rental Ltd | Real estate | 2026 |
| Kobi & Sons Limited | Hospitality | 2019 |
| Koko Blossom UK Ltd | Wholesale & retail | 2017 |
| Konnect Media CIC | Information & communication | 2020 |
| Krunchy F C Ltd | Hospitality | 2024 |
| KRY Property Ltd | Real estate | 2024 |
| Ktrow Refurbishments Ltd | Construction | 2015 |
| KW Home Designs Limited | Professional & scientific | 2021 |
| Kwick Build (Sedbergh) Limited | Real estate | 2018 |
| Kwick Build Limited | Construction | 2016 |
| Kwong Hing Takeaway Ltd | Hospitality | 2022 |
| KY Intelligence Analytics Ltd | Hospitality | 2025 |
| L & D a Taylor Limited | Administrative & support | 2001 |
| L & N Ibrahim Ltd | Health & social care | 2019 |
| L L Hair Limited | Administrative & support | 2009 |
| Labelling Northwest Limited | Professional & scientific | 2009 |
| Lamb and SON Ltd | Construction | 2017 |
| Lash Official Ltd | Other services | 2025 |
| Lavenham Analytics Limited | Information & communication | 2022 |
| Lavenham AP Limited | Information & communication | 2021 |
| Lazi Days Limited | Administrative & support | 2024 |
| LCQ Enterprises Limited | Professional & scientific | 2018 |
| LE Blon Collective Limited | Arts & recreation | 2019 |
| Lead Kinetics Ltd | Professional & scientific | 2019 |
| Leayan Keasi Property Ltd | Real estate | 2026 |
| Ledge Property Ltd | Real estate | 2025 |
| Lees Ventures Ltd | Hospitality | 2025 |
| Leesh ERP Limited | Information & communication | 2016 |
| Legacy Financial Coaching Ltd | Financial services | 2019 |
| Leila Roberts Ltd | Professional & scientific | 2005 |
| Leish Hill Couriers Ltd | Transport & logistics | 2023 |
| Leitch Enterprise Ltd | Real estate | 2021 |
| LET ME Manchester Limited | Administrative & support | 2015 |
| LET US Play Little Town Ltd | Hospitality | 2022 |
| Lets Move Property Specialists Ltd | Real estate | 2017 |
| Levaggi Ice Cream Limited | Wholesale & retail | 2002 |
| LF Capital Holdings Ltd | Financial services | 2026 |
| Life Science Compliance Ltd | Extraterritorial | 2021 |
| Lighting Services (UK) Limited | Manufacturing | 1997 |
| Lilitex Ltd | Wholesale & retail | 2014 |
| Lilybrook Associates Limited | Professional & scientific | 2017 |
| Limesand Ltd | Real estate | 2018 |
| Lincoln Automobile & Transport Services Limited | Other services | 2020 |
| Linen World Limited | Manufacturing | 2014 |
| Lines and INK Ltd | Arts & recreation | 2019 |
| Liquid Complete Ltd | Financial services | 2015 |
| Liquid Expat Financial Services Ltd | Financial services | 2018 |
| Little Angels PRE School (Stalybridge) Limited | Education | 2009 |
| Little Rocky's Ltd | Education | 2019 |
| Little Town (Stalybridge) Limited | Hospitality | 2025 |
| Living for Change CIC | Health & social care | 2026 |
| Living for Change Housing Ltd | Real estate | 2026 |
| Living Luxury Competitions Ltd | Arts & recreation | 2025 |
| Llcooljay Limited | Construction | 2020 |
| Lloyd's GAS Ltd | Construction | 2020 |
| LMM Distributions Ltd | Wholesale & retail | 2026 |
| LMM Management Ltd | Professional & scientific | 2025 |
| Lobo Pro Ltd | Construction | 2021 |
| Loft Investments Limited | Real estate | 2016 |
| Logchain UK Ltd | Information & communication | 2021 |
| Lois Joel Property Limited | Real estate | 2025 |
| Lokfit Ltd | Arts & recreation | 2023 |
| Lola's Catering Ltd | Hospitality | 2025 |
| Longden & Co. Ltd | Professional & scientific | 2008 |
| Longsight Properties Limited | Real estate | 2019 |
| Lord & Midgley Limited | Wholesale & retail | 1957 |
| Love What YOU DO Manchester C.I.C. | Other services | 2019 |
| Lowe Martial Arts Limited | Arts & recreation | 2011 |
| Lowrey Properties Limited | Real estate | 2023 |
| LTC Leeds Limited | Other services | 2024 |
| Luca & Gabriele Limited | Hospitality | 2018 |
| Lullabys Baby Store Ltd | Wholesale & retail | 2021 |
| Lumovolt Limited | Construction | 2025 |
| Luna TLW Ltd | Hospitality | 2021 |
| Lusso Vita Ltd | Wholesale & retail | 2025 |
| Luxe Distrubution Ltd | Wholesale & retail | 2026 |
| Luxor Property Management Limited | Financial services | 2004 |
| Lynn Moffat Limited | Information & communication | 2021 |
| Lynton Hemsley Artist Limited | Arts & recreation | 2011 |
| Lyons Property Services Ltd | Construction | 2015 |
| M a Bond Investments Limited | Real estate | 2014 |
| M E Stubbs Limited | Wholesale & retail | 2014 |
| M Gwozdz Property Management Ltd | Real estate | 2021 |
| M Lawton Installations Ltd | Construction | 2021 |
| M Three Catering Ltd | Information & communication | 2020 |