| Matthew Omede Limited | Professional & scientific | 2016 |
| Mavic Ltd | Wholesale & retail | 2018 |
| Maxdop Ltd | Information & communication | 2011 |
| Maxim Social Care Limited | Health & social care | 2019 |
| Mb's Cupcakes and Bakery Ltd. | Hospitality | 2021 |
| Mcmurray and Martin Ltd | Construction | 2013 |
| MD Haulage Ltd | Transport & logistics | 2016 |
| Merkle Research Limited | Information & communication | 2018 |
| Metropolitan Building and Refurbishment Limited | Construction | 2021 |
| Metropolitan International Global System Ltd | Construction | 2020 |
| Metz & Racine Ltd | Professional & scientific | 2010 |
| MFH Consultancy Limited | Information & communication | 2021 |
| Michon Consulting Services Limited | Professional & scientific | 2023 |
| Mighty Engineering Co. Limited | Wholesale & retail | 1978 |
| Mike Carter Glazing Limited | Construction | 2015 |
| Mila Construction & Development Limited | Construction | 2014 |
| Milk Street Manufacturing Limited | Manufacturing | 2022 |
| MJG Rigging Services Ltd | Manufacturing | 2019 |
| MK Executive Care Services Ltd | Health & social care | 2014 |
| Moatside Services Limited | Financial services | 2019 |
| Modelling and Simulation Ltd | Professional & scientific | 2022 |
| Modern Real Property Limited | Financial services | 1960 |
| Morgan's Juice Bar & Snax Ltd | Hospitality | 2024 |
| Morgans Hair Beauty & Wigs Ltd | Other services | 2014 |
| Morrco Solutions Limited | Other services | 2011 |
| Motorchoice Bristol Ltd | Wholesale & retail | 2017 |
| MRJ Associates Ltd | Administrative & support | 2018 |
| MSM & SON Ltd | Wholesale & retail | 2014 |
| My Little Picasso Limited | Health & social care | 2014 |
| N F Tanner Solutions Ltd | Information & communication | 2022 |
| N&S Fresh 2 Limited | Hospitality | 2011 |
| Natalie Wood Fieldwork Limited | Professional & scientific | 2023 |
| NCL Engineering TS Limited | Professional & scientific | 2021 |
| NE Lifts Ltd | Manufacturing | 2023 |
| Nene Cyber Security Ltd | Information & communication | 2020 |
| New Spring Street Community Nursery Limited | Education | 2015 |
| Newspaceprojects Ltd | Construction | 2018 |
| Newts Oils Ltd | Professional & scientific | 2009 |
| Nextera Group Ltd | Administrative & support | 2019 |
| Nextgen Utilities Limited | Administrative & support | 2020 |
| Night & Day Tyres Limited | Wholesale & retail | 2018 |
| Nikki Lancaster Limited | Administrative & support | 2008 |
| NINETEEN.57 LLP | | 2019 |
| Noospheric Consultants Ltd | Information & communication | 2023 |
| Novustech Consulting Ltd | Information & communication | 2017 |
| NSD Transport Ltd | Transport & logistics | 2018 |
| NTL Fabrication and Welding Ltd | Manufacturing | 2018 |
| Nurunknight Ltd | Hospitality | 2021 |
| Oak 2019 Ltd | Hospitality | 2019 |
| OC Construction (London) Limited | Construction | 2016 |
| Odas Construction Ltd | Construction | 2004 |
| One Fifty London Limited | Hospitality | 2019 |
| Operational Change Management Limited | Professional & scientific | 2014 |
| Opto 24/7 Ltd | Construction | 2019 |
| Overstock Midlands Limited | Wholesale & retail | 2017 |
| P&A PUB Group Ltd | Hospitality | 2022 |
| Panicon Ltd | Information & communication | 2014 |
| Paradiso Custom Tattoo & Piercing Ltd | Other services | 2013 |
| Paramoon Solutions Limited | Information & communication | 2013 |
| Park Farm Medics Limited | Health & social care | 2023 |
| Patton Consulting Group Ltd | Information & communication | 2022 |
| Pavel Consulting Solutions Limited | Information & communication | 2018 |
| PAY AS YOU Throw Ltd | Water & waste | 2020 |
| Peach Blue Capital Ltd | Professional & scientific | 2024 |
| Penumbra Medical Limited | Health & social care | 2021 |
| Penwortham Home Improvements Ltd | Construction | 2023 |
| Percuro Primal UK Ltd | Manufacturing | 2020 |
| Pereira Solutions Ltd | Professional & scientific | 2024 |
| Perfect Builds Group Limited | Construction | 2024 |
| Peter Smith Electrical Limited | Professional & scientific | 2013 |
| Phillip Howard Ltd | Construction | 2012 |
| Phoenix Lawns Ltd | Administrative & support | 2012 |
| Phws Consultancy Ltd | Professional & scientific | 2011 |
| Pickled Pubco Ltd | Hospitality | 2023 |
| Pierce Property Services Limited | Construction | 2018 |
| Pink Dolphin Ltd | Financial services | 2025 |
| Pixel Snobbery Ltd | Other services | 2012 |
| PL Transport Logistics Limited | Water & waste | 2015 |
| Plant Recruitment Group Ltd. | Administrative & support | 2022 |
| Plustech Fibre Ltd | Construction | 2021 |
| Portsea Island Gloucester Limited | Wholesale & retail | 2016 |
| Posh & Flair Style Ltd | Wholesale & retail | 2021 |
| Poyraz Energy Services Limited | Administrative & support | 2012 |
| Prabha Limited | Information & communication | 2005 |
| Prestige Gardens Limited | Administrative & support | 2016 |
| Primal Burgers Ltd | Hospitality | 2023 |
| Psbot Consultancy Limited | Information & communication | 2016 |
| Psebuilding and Construction Ltd | Construction | 2022 |
| Pure-Environmental Ltd | Construction | 2013 |
| Purpleworm IT Consulting Limited | Information & communication | 2009 |
| Quartex Components Limited | Manufacturing | 1985 |
| Quay Cutting Ltd | Information & communication | 2009 |
| QUICK2ISSUE Ltd | Transport & logistics | 2016 |
| Quinlan Advisory Ltd | Professional & scientific | 2013 |
| Quinntell Ltd | Information & communication | 2021 |
| Quizzy Works Limited | Information & communication | 2014 |
| Quorum Otley Limited | Hospitality | 2024 |
| R @ LEO Limited | Construction | 2010 |
| R C Mcdonald Limited | Construction | 2006 |
| Rapid Response Facilities Management Ltd | Water & waste | 2024 |