| MHA Properties & Holdings Ltd | Real estate | 2026 |
| Mhamza Limited | Wholesale & retail | 2023 |
| Mharvis Ltd | Wholesale & retail | 2025 |
| MHB Catering Services Ltd | Hospitality | 2019 |
| MHC Construction Limited | Construction | 2022 |
| MHC Solutions Ltd | Professional & scientific | 2026 |
| Mhcp Rentals Ltd | Real estate | 2025 |
| Mhester Administration Limited | Extraterritorial | 2007 |
| Mhester Investments Limited | Extraterritorial | 2007 |
| Mhester Services Limited | Extraterritorial | 2007 |
| MHG Property Consulting Ltd | Real estate | 2025 |
| MHL DEV Ltd | Information & communication | 2018 |
| MHL Property Investments Ltd | Real estate | 2025 |
| MHS Food Limited | Hospitality | 2023 |
| MHT Solutions Limited | Health & social care | 2010 |
| MI Amor Ltd | Wholesale & retail | 2022 |
| MI Auto Repairs Ltd | Wholesale & retail | 2020 |
| MI Surfaces Ltd | Construction | 2020 |
| Miazoi Ceramics Ltd | Manufacturing | 2025 |
| Miba Tales Limited | Information & communication | 2024 |
| MIC Futures Limited | Financial services | 2022 |
| Micaz Care Limited | Professional & scientific | 2025 |
| Michael Aldrich Ltd | Wholesale & retail | 2025 |
| Michael Alexander Services Limited | Construction | 2016 |
| Michael Angelo Ltd | Real estate | 2017 |
| Michael Cherry Ltd | Wholesale & retail | 2025 |
| Michael John Stanger Services Ltd | Construction | 2024 |
| Michael Joseph's Hair and Beauty Limited | Other services | 2017 |
| Michael R Peters Limited | Wholesale & retail | 2015 |
| Michael Wright H & S Solutions Limited | Administrative & support | 2015 |
| Michaela's Creative Arts Ltd | Education | 2024 |
| Michaelmas Green (Shefford) Management Company Limited | Households | 2005 |
| Michelle Wood Photographer Limited | Professional & scientific | 2018 |
| Micho Ventures Limited | Wholesale & retail | 2021 |
| Micmar International Limited | Construction | 2023 |
| Micro Sales Service Limited | | 1987 |
| Micro-Finishers Limited | Manufacturing | 2012 |
| MID Bedfordshire Community Fridge CIC | Hospitality | 2025 |
| MID Beds Conveyancing Services Limited | Professional & scientific | 2004 |
| MID Beds Mortgage Services Ltd | Financial services | 2012 |
| MID Beds Tyres Ltd | Wholesale & retail | 2010 |
| Midas Pattern Company Limited | Manufacturing | 1995 |
| Midbrass Limited | Wholesale & retail | 1972 |
| Middle East Chemicals Limited | Wholesale & retail | 1980 |
| Middle Path Estate Planning Limited | Professional & scientific | 2020 |
| Middle Time Catering Ltd | Manufacturing | 2023 |
| Middleton Structures Ltd | Construction | 2012 |
| Midland Champ Properties Ltd | Real estate | 2025 |
| Midland Food Services Ltd | Hospitality | 2023 |
| Midland Painting Contractors Ltd | Construction | 2024 |
| Midland Road Management Company Limited | Extraterritorial | 2003 |
| Midlands Greenhouse Ltd | Wholesale & retail | 2023 |
| Midlands Investment Holdings Ltd | Financial services | 2023 |
| Midlands Steel Decking Ltd | Construction | 2016 |
| Midori Pools and Gardens Ltd | Administrative & support | 2018 |
| Midpoint Cambourne Limited | Construction | 2020 |
| Midpoint Developments Limited | Construction | 2020 |
| Midpoint NO.1 Limited | Construction | 2020 |
| Midpoint NO.2 Limited | Construction | 2020 |
| Midway Roadtanker Services Limited | Wholesale & retail | 1998 |
| MIE Group Ltd | Financial services | 2022 |
| MIG Auto Ltd | Wholesale & retail | 2025 |
| Mihai Hugianu Limited | Construction | 2020 |
| Mihai Mornea Limited | Transport & logistics | 2025 |
| Mike Lawrie & Co Limited | Wholesale & retail | 2023 |
| Mike Mcgowan Driver Training Ltd | Education | 2011 |
| Mike Murphy Racing LLP | | 2007 |
| Mike Pitt Mortgages Ltd | Financial services | 2018 |
| Mike Steed Consulting Limited | Professional & scientific | 2016 |
| Mikey Davis Woodwind Ltd | Arts & recreation | 2025 |
| Mil-Tari Interventions Limited | Health & social care | 2014 |
| Mila Kaur Limited | Real estate | 2024 |
| Milan Transport Ltd | Transport & logistics | 2022 |
| Milano Couture Ltd | Wholesale & retail | 2016 |
| Milargo Trading Ltd | Wholesale & retail | 2025 |
| Mile Road Allotment and Leisure Gardeners Association | Agriculture & fishing | 2012 |
| Mile Road Garage Ltd | Wholesale & retail | 2024 |
| Mile Stores Limited | Wholesale & retail | 2015 |
| Mile Trans Ltd | Transport & logistics | 2015 |
| Mileacre Lettings Limited | Real estate | 2025 |
| Mileacre Limited | Construction | 2009 |
| Mileacre Residential Limited | Real estate | 2025 |
| Milena Healthcare Ltd | Health & social care | 2023 |
| Miles (Bedford) Limited | Financial services | 1962 |
| Miles Retail Ltd | Wholesale & retail | 2014 |
| Mileslet Limited | Real estate | 2020 |
| Milestone BI Limited | Information & communication | 2018 |
| Milestone Consulting Ltd | Professional & scientific | 2024 |
| Miletree Prestige Motors Limited | Wholesale & retail | 2018 |
| Military Medals & Books (Bedford) Limited | Wholesale & retail | 2018 |
| Mill Barn (Bedford) RTM Company Limited | Households | 2023 |
| Mill Cottages RTM Company Limited | Households | 2025 |
| Mill Court Management Limited | Households | 1993 |
| Mill Flooring Limited | Wholesale & retail | 2011 |
| Mill Motors Limited | Wholesale & retail | 2020 |
| Mill Street Bedford Management Company Ltd | Professional & scientific | 2015 |
| Mill Street Limited | Real estate | 2024 |
| Millennial Painting and Decorating Ltd | Construction | 2024 |
| Millennium Independent Mercedes Benz Repairers Limited | Wholesale & retail | 2006 |
| Millennium Pools Ltd | Other services | 2018 |