| Mana Rock Games Limited | Wholesale & retail | 2025 |
| Manage My Place Ltd | Construction | 2024 |
| Manageasy Limited | Information & communication | 2024 |
| Managed Mayhem Removals Ltd. | Transport & logistics | 2016 |
| Managed Office Network Ltd | Information & communication | 2024 |
| Management Sushi Limited | Professional & scientific | 2009 |
| Management Systems Consultancy Limited | Professional & scientific | 2014 |
| Manara Orthopaedic Services Ltd | Health & social care | 2024 |
| Manark Group Ltd | Extraterritorial | 2025 |
| Manark Holdings Ltd | Extraterritorial | 2026 |
| Manark Ltd | Extraterritorial | 2026 |
| Manchester Fluid System Technologies Limited | Wholesale & retail | 2024 |
| Manchester Football Club Limited | Arts & recreation | 2025 |
| Manci Recruitment Ltd | Administrative & support | 2025 |
| Manco Ltd | Administrative & support | 2026 |
| Mancorp (UK) Limited | Professional & scientific | 2006 |
| Mandala Interiors Ltd | Construction | 2023 |
| Mandaquin Ltd | Extraterritorial | 2026 |
| Mandara Energy Limited | Financial services | 2010 |
| Mandarin Restaurant Limited | Hospitality | 2025 |
| Mandarina Investments Limited | Real estate | 2004 |
| Manderley Consulting Services Limited | Real estate | 2015 |
| Manderley Investments Limited | Real estate | 2016 |
| Mandi Nation Bristol Limited | Hospitality | 2025 |
| Mandi Palace Ltd | Hospitality | 2024 |
| Mandik UK Limited | Construction | 2020 |
| Mandoe Media UK Ltd | Wholesale & retail | 2022 |
| Mane (Bristol) Limited | Other services | 2018 |
| Mane S.D. Holdings Ltd | Wholesale & retail | 2021 |
| Mangal Travel & Tours Limited | Administrative & support | 2026 |
| Mango Consulting Limited | Professional & scientific | 2005 |
| Mango Creative Limited | Professional & scientific | 2019 |
| Mango Home Improvements Ltd | Construction | 2011 |
| Mango Medical Ltd | Health & social care | 2023 |
| Mango Mirchi Ltd | Hospitality | 2024 |
| Mango Moon Clevedon Ltd | Wholesale & retail | 2026 |
| Mango Nest Limited | Education | 2023 |
| Mango Seed Holdings Limited | Real estate | 2023 |
| Mango Signs Ltd | Professional & scientific | 2023 |
| Mangomap Limited | Information & communication | 2013 |
| Mangosteen Clifton Ltd | Hospitality | 2025 |
| Mangosteen Gloucester Road Ltd | Hospitality | 2025 |
| Mangosteen North ST Ltd | Hospitality | 2025 |
| Mangostone Ltd | Arts & recreation | 2017 |
| Mangotsfield Roofing Limited | Construction | 2015 |
| Mangotsfield United Football Club Limited | Arts & recreation | 2001 |
| Mangrovespm Limited | Professional & scientific | 2025 |
| Maniaraf Ltd | Transport & logistics | 2019 |
| Manic Compression Recordings Ltd | Information & communication | 2012 |
| Manicom Serv Ltd | Transport & logistics | 2024 |
| Manifest Associates Ltd | Information & communication | 2012 |
| Manifest Recruitment Limited | Administrative & support | 2022 |
| Maniks Resturant Ltd | Hospitality | 2013 |
| Manilla Thrillers Limited | Professional & scientific | 2012 |
| Manish Builders Ltd | Construction | 2026 |
| Manivel Limited | Real estate | 2026 |
| Manjit Properties Ltd | Real estate | 2023 |
| Manjou Limited | Health & social care | 2016 |
| Mann Keyford Limited | Real estate | 2021 |
| Mann Property Assets Ltd | Real estate | 2020 |
| Mann Property Solutions Ltd | Real estate | 2020 |
| Manna Catering Bristol Ltd | Hospitality | 2017 |
| Mannamead Business Services Limited | Professional & scientific | 2003 |
| Mannat Technologies Limited | Administrative & support | 2010 |
| Mannatech Limited | Wholesale & retail | 1998 |
| Manni Sky Limited | Administrative & support | 2024 |
| Mannico Ltd | Construction | 2018 |
| Manning's Legal Services Ltd | Professional & scientific | 2017 |
| Mannings Contract Labour Ltd | Other services | 2022 |
| Mannings Facilities Management Limited | Construction | 1993 |
| Mannings Mead Storage Ltd | Transport & logistics | 2019 |
| Mannion Tunnelling Limited | Construction | 2017 |
| Manny Property Services Ltd | Households | 2020 |
| Mano Works Ltd | Construction | 2020 |
| Manoir DE Valentine Limited | Hospitality | 2018 |
| Manor (Felton) Limited | Construction | 2001 |
| Manor Auto Salvage & Recycling Limited | Water & waste | 2013 |
| Manor Community Care Limited | Health & social care | 2019 |
| Manor Escapes Ltd | Real estate | 2025 |
| Manor Farm (Solar Power) Ltd | Energy | 2011 |
| Manor Farm (Winterbourne Monkton) Management Company Ltd | Households | 2019 |
| Manor Farm Community Hub C.I.C. | Other services | 2019 |
| Manor Farm Property Holdings Limited | Real estate | 2024 |
| Manor Gardens Frenchay Management Company Limited | Households | 2023 |
| Manor House Cars Limited | Wholesale & retail | 2010 |
| Manor Investments (SW) Ltd | Professional & scientific | 2023 |
| Manor Maintenance Ltd | Construction | 2025 |
| Manor Mortgage Services Direct Limited | Financial services | 1997 |
| Manor Mortgage Solutions Ltd | Financial services | 2012 |
| Manor of Roscraddoc Limited | Mining & quarrying | 1952 |
| Manor Properties (Bristol) Limited | Real estate | 2006 |
| Manor Road Lettings Limited | Construction | 2012 |
| Manor Scrap Company (Fishponds) Limited | Wholesale & retail | 1974 |
| Manor Vets Limited | Extraterritorial | 2015 |
| Manoza Property Ltd | Real estate | 2025 |
| Manpod Ltd | Extraterritorial | 2025 |
| Manridge Communications Limited | Professional & scientific | 2024 |
| Manroh Consulting PVT Limited | Information & communication | 2022 |
| Mansar Group Ltd | Real estate | 2025 |
| Mansard Law Limited | Professional & scientific | 2017 |