| Keyhive.Io Ltd | Information & communication | 2020 |
| King Street Management Company Ltd | Real estate | 2022 |
| Kirkland & Lane Southwell Ltd | Professional & scientific | 2016 |
| Kyriakos Tsolakis Studio Limited | Professional & scientific | 2026 |
| Last Night I Dreamt Limited | Wholesale & retail | 2018 |
| Learmonth Wealth Management Ltd | Financial services | 2022 |
| Lets GET Lost Properties Ltd | Real estate | 2020 |
| Lifeflowbalance Coaching and Consulting Ltd. | Professional & scientific | 2016 |
| Lilac Farm Ltd | Health & social care | 2016 |
| Lime Arnold Group Limited | Construction | 2019 |
| Lime Energy Limited | Professional & scientific | 2021 |
| Lina's Cafe 25 Ltd | Hospitality | 2026 |
| Liphook Valet Service (DRY Cleaners) Limited | Other services | 2000 |
| Liphook Valet Services Limited | Real estate | 1987 |
| Little Brunette Bakery Limited | Manufacturing | 2021 |
| Little Green Pasture Ltd | Hospitality | 2024 |
| Little Laser Lounge Limited | Other services | 2024 |
| Littmann Consulting Limited | Professional & scientific | 2024 |
| Longden Transport Ltd | Transport & logistics | 2013 |
| Longden Transport Services Ltd | Transport & logistics | 2026 |
| Lottie Barclay Limited | Wholesale & retail | 2017 |
| Loved by Studio Limited | Wholesale & retail | 2023 |
| Lovely Fodder Limited | Manufacturing | 2005 |
| Lpic (Calverton) Limited | Extraterritorial | 2015 |
| Lympton Properties Limited | Extraterritorial | 1972 |
| M J C Motors (Southwell) Limited | Wholesale & retail | 2012 |
| Macintosh Davies Limited | Professional & scientific | 2023 |
| Maclarty Brown Media Limited | Information & communication | 2008 |
| MAH Property Limited | Real estate | 2026 |
| Management Company Private Drive Limited | Households | 2021 |
| Marcus Farnsworth Ltd | Arts & recreation | 2014 |
| Marple Marketing Consultancy Limited | Professional & scientific | 2022 |
| Marshall Project Solutions Ltd | Construction | 2017 |
| Marvellous Machines Ltd | Information & communication | 2023 |
| Mastech China Limited | Construction | 2014 |
| Mathias Perry Limited | Real estate | 2011 |
| Maurice & Harry Limited | Financial services | 2023 |
| Maythorne Mill (Southwell) Management Limited | Real estate | 1984 |
| Maythorne Properties Limited | Real estate | 2006 |
| Maythorne Second Mill Apartments (Southwell) Management Limited | Households | 1987 |
| MBS Business Services Ltd | Energy | 2010 |
| MC248 Ltd | Administrative & support | 2023 |
| Mehta Media Ltd | Information & communication | 2016 |
| Metcalfe Close Residents Association Limited | Households | 1994 |
| MFA Building Services Limited | Administrative & support | 2010 |
| MIK JR Ltd | Wholesale & retail | 2018 |
| Mini Brow and Beauty Limited | Hospitality | 2023 |
| Minster Commercial Mortgages Limited | Financial services | 2025 |
| Minster Energy Assessments Limited | Professional & scientific | 2024 |
| Minster FB Ltd | Other services | 2007 |
| Minster Five 2’S Limited | Transport & logistics | 2018 |
| Minster Garage Limited | Wholesale & retail | 1939 |
| Minster Lettings Limited | Real estate | 2025 |
| Minster Mortgages Limited | Financial services | 2022 |
| MLM Consult Ltd | Construction | 2007 |
| Mnm's Windows Ltd | Administrative & support | 2025 |
| Modus Accounting & Tax Limited | Professional & scientific | 2005 |
| MR & MRS Fine Wine Ltd | Wholesale & retail | 2023 |
| Mughal Rasoi Limited | Hospitality | 2022 |
| Muirfield Estate & Letting Agents Southwell Limited | Real estate | 2023 |
| Muirfield Property Services Limited | Real estate | 2012 |
| Musical Magpie Ltd | Arts & recreation | 2022 |
| MWG Homes Limited | Real estate | 2010 |
| N. Holland Limited | Wholesale & retail | 2001 |
| Nancy George Limited | Real estate | 2013 |
| Nationwide Timber Roof Systems Ltd | Other services | 2022 |
| NCD IT Services Ltd | Professional & scientific | 2024 |
| New Hall Farm Storage Ltd | Transport & logistics | 2022 |
| New Home Feels Ltd | Wholesale & retail | 2024 |
| Nomad Comps Ltd | Other services | 2026 |
| NOO YOO Ltd | Extraterritorial | 2015 |
| Norwood Park Events Limited | Other services | 2000 |
| Norwood Park Limited | Hospitality | 2026 |
| Nottinghamshire Building Preservation Trust Limited | Arts & recreation | 1967 |
| Nouli Activewear Limited | Wholesale & retail | 2012 |
| Oakmere Park Oxton Limited | Arts & recreation | 1979 |
| Oakwood Climate Consulting Limited | Professional & scientific | 2024 |
| Oakworth Construction Limited | Construction | 2022 |
| Old Company (1000) Limited | Extraterritorial | 1990 |
| Old Hall (Matlock) Ltd | Real estate | 2023 |
| Olive Motor Group Limited | Wholesale & retail | 2017 |
| OM Capital Holdings Limited | Information & communication | 2022 |
| Optique Vision (Southwell) Limited | Wholesale & retail | 2015 |
| Opulence Management Services Limited | Administrative & support | 2015 |
| Oxton Contracting Limited | Agriculture & fishing | 2012 |
| Oxton Hill Farm Management Company Limited | Households | 2016 |
| P.Roberts Properties Ltd | Real estate | 2023 |
| Pacific MI Limited | Professional & scientific | 2024 |
| Paddock Industries Limited | Financial services | 2025 |
| Parent Survival Ltd | Wholesale & retail | 2021 |
| Park Grove Investment Properties Limited | Real estate | 2020 |
| Patka Ltd | Transport & logistics | 2015 |
| Patrick Smith Marketing Ltd | Professional & scientific | 2019 |
| Pattenuk Ltd | Information & communication | 2022 |
| Paul Anthony Building Ltd. | Construction | 2011 |
| Paul Keenan - Accounts and Tax Services Limited | Professional & scientific | 2007 |
| Pengwn Drinks Limited | Wholesale & retail | 2022 |
| Pensafe Ltd | Wholesale & retail | 2017 |
| Persia Place Management Limited | Households | 2024 |
| Peter Cussans Ltd | Wholesale & retail | 2016 |