| MK Shake Limited | Hospitality | 2016 |
| MK Shisha Ltd | Hospitality | 2022 |
| MK Signs & Print Ltd | Manufacturing | 2025 |
| MK Sipp Trustees UK Limited | Financial services | 2009 |
| MK Smashers Pickleball Social Club Community Interest Company | Arts & recreation | 2025 |
| MK Soapy Suds Ltd | Other services | 2019 |
| MK Solid Surfaces Ltd | Manufacturing | 2018 |
| MK Solution Group Ltd | Construction | 2025 |
| MK Sound and Vision Limited | Wholesale & retail | 2010 |
| MK Sounds Ltd | Information & communication | 2022 |
| MK Spark Cleaners Ltd | Administrative & support | 2025 |
| MK Spice Limited | Hospitality | 2025 |
| MK Sports and Fashion Ltd | Wholesale & retail | 2025 |
| MK Sports Services Ltd | Other services | 2017 |
| MK Stairlifts Ltd | Manufacturing | 2017 |
| MK Steel and Fabrication Services Limited | Manufacturing | 2013 |
| MK Stunning Looks Limited | Other services | 2018 |
| MK Subs Ltd | Hospitality | 2015 |
| MK Supported Housing Limited | Health & social care | 2015 |
| MK Surveys Group Limited | Professional & scientific | 2023 |
| MK Sushi Bar Ltd | Hospitality | 2023 |
| MK Swan Rescue CIC | Professional & scientific | 2024 |
| MK Swift Express Ltd | Transport & logistics | 2026 |
| MK Tamil United Ltd | Arts & recreation | 2024 |
| MK Tax & Accounting Limited | Professional & scientific | 2006 |
| MK Tax Accountants Limited | Professional & scientific | 2009 |
| MK Taxis Limited | Transport & logistics | 2022 |
| MK Tech International Limited | Wholesale & retail | 2025 |
| MK Thai Massage Ltd | Other services | 2025 |
| MK Tools Ltd | Wholesale & retail | 2025 |
| MK Tours Driving Limited | Education | 2024 |
| MK Tower Services Ltd | Wholesale & retail | 2013 |
| MK Traction Ltd | Transport & logistics | 2019 |
| MK Tractors Limited | Administrative & support | 2009 |
| MK Transfers Limited | Transport & logistics | 2023 |
| MK Tyres 4 U Ltd | Wholesale & retail | 2015 |
| MK Unique Lettings Ltd | Real estate | 2024 |
| MK United Football Club Limited | Arts & recreation | 2024 |
| MK Urban Taxi's Service Ltd | Transport & logistics | 2025 |
| MK Urology Services Limited | Other services | 2013 |
| MK Valeting Services UK Ltd | Other services | 2019 |
| MK Vehicle Logistics Limited | Wholesale & retail | 2023 |
| MK Vertical Blinds Ltd | Wholesale & retail | 2017 |
| MK VIP Services Ltd | Transport & logistics | 2020 |
| MK Volt + Ltd | Construction | 2026 |
| MK West Tailor Limited | Manufacturing | 2023 |
| MK Wheels Ltd | Wholesale & retail | 2025 |
| MK Wholesale Cash & Carry Ltd | Wholesale & retail | 2025 |
| MK Wired Ltd | Construction | 2019 |
| MK WOK Limited | Hospitality | 2024 |
| Mk-Lets Ltd | Real estate | 2018 |
| MK1 Capital Partners LLP | | 2024 |
| MK1 Parking Limited | Administrative & support | 2023 |
| MK1 Training Centre Ltd | Education | 2020 |
| MK11 Ltd | Hospitality | 2016 |
| MK12 Autocare Limited | Wholesale & retail | 2021 |
| MK1POD Limited | Information & communication | 2021 |
| MK2 Car Rental Ltd | Administrative & support | 2026 |
| MK2 Couriers Ltd | Transport & logistics | 2024 |
| MK2 Motors Ltd | Wholesale & retail | 2020 |
| MK3 Electrical Services Ltd | Construction | 2019 |
| MK4 Autotrade Ltd | Wholesale & retail | 2025 |
| MK5 Rooms Ltd | Real estate | 2023 |
| MK56 Ltd | Hospitality | 2025 |
| MK6 Ltd | Manufacturing | 2022 |
| MK62 Ltd | Hospitality | 2025 |
| Mkai International Ltd | Wholesale & retail | 2014 |
| Mkairsports Limited | Education | 2025 |
| Mkal Contractors Ltd | Construction | 2019 |
| Mkayd Services Limited | Health & social care | 2011 |
| MKB Financial Advisers Ltd | Information & communication | 2004 |
| Mkbds Ltd | Real estate | 2020 |
| Mkbright Properties Limited | Households | 2025 |
| MKC Car Hire Ltd | Wholesale & retail | 2025 |
| MKC Commercial Limited | Administrative & support | 2020 |
| Mkcc Limited | Hospitality | 2015 |
| Mkcil Ltd | Information & communication | 2002 |
| Mkcp Limited | Hospitality | 2015 |
| MKD Enabling Services Limited | Health & social care | 2018 |
| Mkeelam Private Ltd | Wholesale & retail | 2026 |
| Mkfm Limited | Information & communication | 2011 |
| Mkgb Fire Safe Ltd | Financial services | 2022 |
| Mkglobal Properties Ltd | Real estate | 2026 |
| Mkgrillz Limited | Manufacturing | 2019 |
| Mkgu Rotary Charitable Trust | Other services | 2008 |
| MKH Accountancy Ltd | Professional & scientific | 2024 |
| Mkha (Events) Limited | Administrative & support | 2025 |
| Mkhaus Ltd | Wholesale & retail | 2022 |
| Mkhayat Ltd | Wholesale & retail | 2026 |
| Mkherbal Ltd | Wholesale & retail | 2024 |
| Mkhut Portfolios Ltd | Real estate | 2021 |
| Mkig Limited | Professional & scientific | 2020 |
| Mkinstalls Ltd | Construction | 2021 |
| MKJ Couriers Ltd | Transport & logistics | 2017 |
| Mkjw Property Management Ltd | Real estate | 2024 |
| MKK Food Europe Ltd | Hospitality | 2024 |
| MKM Care Homes Ltd | Health & social care | 2026 |
| Mkma Ltd | Other services | 2012 |
| Mkmeaty Ltd | Hospitality | 2023 |
| Mkmotcare Ltd | Wholesale & retail | 2019 |