| MJM Formfix Limited | Construction | 2003 |
| MJM Holdings 1 Limited | Wholesale & retail | 2025 |
| MJM Volts Ltd | Manufacturing | 2026 |
| MJN Safety Signs Limited | Administrative & support | 2014 |
| MJP IT Consulting Limited | Information & communication | 2017 |
| MJP Property Group Ltd | Real estate | 2025 |
| MJR Strategic Consulting Ltd | Other services | 2020 |
| MJS Financial Investments Limited | Information & communication | 2022 |
| MJS Holdings Ltd | Financial services | 2024 |
| MJT Developments Limited | Construction | 2015 |
| MJT Investment Partnership LLP | | 2019 |
| MJT Recycling Limited | Professional & scientific | 2015 |
| MJV Events Limited | Wholesale & retail | 2024 |
| MJV Installations Ltd | Construction | 2011 |
| MJW (JV1) Limited | Construction | 2023 |
| MJW Finance Ltd | Financial services | 2017 |
| MJW Interiors Ltd | Construction | 2024 |
| MJW Retail Tiles Ltd | Wholesale & retail | 2012 |
| MJW Solutions Limited | Construction | 2025 |
| MJW Technical Consulting Limited | Information & communication | 2021 |
| MK Accountancy & Finance Recruitment Limited | Administrative & support | 2022 |
| MK Building Maintenance Ltd | Construction | 2020 |
| MK by Sameeya K Ltd | Wholesale & retail | 2025 |
| MK by Sameeya Property Ltd | Real estate | 2025 |
| MK Care Services Limited | Health & social care | 2014 |
| MK City Roofing Ltd | Construction | 2022 |
| MK Conveyancing Ltd | Professional & scientific | 2026 |
| MK Creative Consultants Limited | Professional & scientific | 2017 |
| MK Elevate AI Ltd | Administrative & support | 2022 |
| MK Engineering Recruitment Limited | Administrative & support | 2022 |
| MK Enterprises Leeds Ltd | Professional & scientific | 2024 |
| MK Environmental Ltd | Administrative & support | 2020 |
| MK Express Deliveries Ltd | Transport & logistics | 2023 |
| MK Fruit & VEG Ltd | Wholesale & retail | 2026 |
| MK Group Leeds Ltd | Real estate | 2024 |
| MK Homes and Support Ltd | Health & social care | 2024 |
| MK II Ltd | Extraterritorial | 2020 |
| MK Industrial and Logistics Recruitment Limited | Administrative & support | 2021 |
| MK Labs Technology Ltd | Administrative & support | 2020 |
| MK Logistics Recruitment Ltd | Extraterritorial | 2020 |
| MK Minimart Limited | Wholesale & retail | 2026 |
| MK North East Ltd | Administrative & support | 2021 |
| MK Parsan Ltd | Health & social care | 2014 |
| MK Performance Tuning Ltd | Wholesale & retail | 2024 |
| MK Properties and Estates Ltd | Real estate | 2026 |
| MK Properties Leeds Ltd | Real estate | 2026 |
| MK Properties Warwickshire Ltd | Households | 2026 |
| MK Protection Advice Ltd | Financial services | 2024 |
| MK Psychology Support Ltd | Education | 2019 |
| MK RAD Ltd | Health & social care | 2020 |
| MK Real Property Ltd | Real estate | 2023 |
| MK Rendering Limited | Construction | 2026 |
| MK Service Leeds Ltd | Wholesale & retail | 2014 |
| MK Sheeting and Cladding Ltd | Construction | 2007 |
| MK Things Happen Ltd | Administrative & support | 2003 |
| Mk&Gb Properties Ltd | Real estate | 2024 |
| Mk-Morive Limited | Transport & logistics | 2014 |
| MKA Data Solutions Limited | Information & communication | 2023 |
| Mkazy Limited | Health & social care | 2020 |
| MKD Electrical Ltd | Construction | 2024 |
| MKD Maintenance Ltd | Construction | 2025 |
| Mkdp LLP | | 2009 |
| MKG Optical Consultancy Ltd | Health & social care | 2022 |
| MKI Store Limited | Wholesale & retail | 2012 |
| MKJ Commercial Ltd | Other services | 2026 |
| MKJ Healthcare Limited | Health & social care | 2014 |
| Mklcb Ltd | Professional & scientific | 2023 |
| MKM Buildings & Construction Ltd | Construction | 2023 |
| MKO Edibles Limited | Wholesale & retail | 2025 |
| MKO Miharbi Limited | Construction | 2016 |
| Mkoko Healthcare Ltd | Health & social care | 2022 |
| Mkps Group Holdings Ltd | Real estate | 2024 |
| Mkrp Consultancy Ltd | Information & communication | 2017 |
| MKS Properties Leeds Ltd | Real estate | 2022 |
| MKS Property Ltd | Real estate | 2017 |
| Mksecurityandservices Ltd | Administrative & support | 2021 |
| Mksk Construction Ltd | Construction | 2021 |
| Mksk Consultancy Ltd | Professional & scientific | 2023 |
| Mksn Investments Ltd | Real estate | 2024 |
| MKZ Consult Limited | Energy | 2025 |
| ML & HL Properties Ltd | Real estate | 2018 |
| ML Gates & Railings Ltd | Manufacturing | 2026 |
| ML Phase 2 Limited | Construction | 2017 |
| ML Property Investment Ltd | Real estate | 2019 |
| ML Sales and Marketing Limited | Extraterritorial | 2022 |
| ML Security Systems Ltd | Administrative & support | 2022 |
| Ml&Sons Electrical & Construction Ltd | Construction | 2025 |
| ML2 Networx Ltd | Administrative & support | 2011 |
| MLA Pharma (Yorkshire) Ltd | Health & social care | 2018 |
| Mlas Collections Ltd | Water & waste | 2014 |
| MLB Group Limited | Financial services | 2024 |
| MLC Cleaning Services Ltd | Administrative & support | 2018 |
| MLC IT Ltd | Information & communication | 2015 |
| Mlcl Ltd | Transport & logistics | 2026 |
| Mlgprop Ltd | Extraterritorial | 2021 |
| MLH Electrical Limited | Construction | 2018 |
| MLK Sons Ltd | Information & communication | 2024 |
| MLM Hackett Group Ltd | Hospitality | 2025 |
| MLM Holdings Limited | Professional & scientific | 2000 |
| MLM Yorkshire Ltd | Wholesale & retail | 2024 |