| J & W Robertson (Beanston Farms) | | 1999 |
| J S Fortune | | 1987 |
| J. & K. Trainer Ltd. | Administrative & support | 2012 |
| JJG Shotblasting Limited | | 2002 |
| John & Andrew Riddell Farmers | | 1992 |
| John G. Mackintosh Holdings Limited | Administrative & support | 2007 |
| John Mckenzie Photography Limited | Professional & scientific | 2010 |
| John Moodie and Sons LLP | | 2001 |
| John R. Dale & Sons Limited | Agriculture & fishing | 1955 |
| John Smith (Cairndinnis) Limited | Agriculture & fishing | 1964 |
| Justin Lamb Associates Limited | Real estate | 2009 |
| K. Crawford Ltd | Construction | 2024 |
| K.C. Scaffolding Ltd. | Construction | 1999 |
| Karoth Ltd | Wholesale & retail | 2012 |
| Keithhill Cattle Company Limited | Agriculture & fishing | 2002 |
| Kilspindie Golf Club Limited | Arts & recreation | 2000 |
| KT Farming Ltd | Agriculture & fishing | 2013 |
| Kyanis Limited | Information & communication | 2001 |
| L & G Contracts Limited | Construction | 2001 |
| Leisure Time Sports Limited | Wholesale & retail | 2003 |
| Lifestyle Express (Edinburgh) Ltd | Wholesale & retail | 2008 |
| Lockett Bros Limited | Wholesale & retail | 2004 |
| Lothian Electric Machines Limited | Manufacturing | 1961 |
| Lucrative Investments Ltd | Real estate | 2022 |
| Luffness New Golf Club Limited | Arts & recreation | 1979 |
| Lyten Limited | Manufacturing | 1989 |
| Lyten Services Limited | Real estate | 1989 |
| M & D Vehicle Management Ltd | Professional & scientific | 2006 |
| M & T Pipeline Supplies Limited | Wholesale & retail | 2002 |
| M.B.Joinery Ltd | Manufacturing | 2015 |
| M.F. Property Developments Limited | Real estate | 2006 |
| Mads Limited | Other services | 2005 |
| MAN Sunday Limited | Arts & recreation | 2004 |
| Marchitects Limited | Professional & scientific | 2005 |
| Mavis Hall Steading Limited | Real estate | 2016 |
| Mcinroy & Wood Limited | Financial services | 1986 |
| Messrs Kennedy Ltd | Agriculture & fishing | 1954 |
| Millstone Farm Holdings | | 1997 |
| MM Museum Ltd. | Arts & recreation | 2013 |
| MMM Resources Limited | Energy | 2011 |
| Montgomery Golf Ltd. | Administrative & support | 1997 |
| Naturally Inspired Garden Consultancy Limited | Administrative & support | 2004 |
| Newhailes Farming Partnership | | 1988 |
| Newmains Partnership | | 1994 |
| Numac Precision Engineering Limited | Manufacturing | 1987 |
| Online Retail Systems Limited | Information & communication | 2006 |
| Peffer Pigs | | 2000 |
| Pink Enterprises Limited | Other services | 2004 |
| PJM Joinery & Building Ltd. | Construction | 2003 |
| Plotstep Limited | Real estate | 1989 |
| PMR Leisure Limited | Professional & scientific | 1999 |
| Polymorph Acoustics Ltd | Professional & scientific | 2025 |
| Precision Sports Ltd | Arts & recreation | 2020 |
| Premitel Connections Ltd | Information & communication | 2004 |
| Pure Food Ingredients Limited | Manufacturing | 1986 |
| Pure Malt Products Limited | Manufacturing | 1963 |
| Pure Malt Whisky Liqueur Limited | Manufacturing | 1986 |
| Pure Natural Foods Limited | Manufacturing | 1986 |
| QRM Academy Limited | Education | 2013 |
| Queen Margaret University, Edinburgh | Education | 1909 |
| R B Kerr & SON | | 1990 |
| R M Brown Demolitions Limited | Construction | 2006 |
| Recycling Precious Metals LP | | 2016 |
| Redcoll Catering Ltd | Hospitality | 2018 |
| Redcoll Estates Limited | Agriculture & fishing | 1983 |
| Rettie & Co Designated Member Limited | Financial services | 2024 |
| Rettie & Company Limited | Real estate | 1993 |
| Rettie Financial Services Ltd | Financial services | 2021 |
| Rettie Private Equity LLP | | 2007 |
| RHJ Taxis Ltd. | Professional & scientific | 2001 |
| Roadbreaker Limited | Professional & scientific | 2006 |
| Robert Lessels Consulting Engineers Limited | Professional & scientific | 1988 |
| Robertson Bros. Engineering Ltd. | Manufacturing | 2001 |
| Royal Musselburgh Golf Club (the) Limited | Arts & recreation | 1925 |
| S Luca Limited | Manufacturing | 2006 |
| S Luca of Musselburgh Limited | Manufacturing | 2006 |
| Samuel White & Company Limited | Agriculture & fishing | 1960 |
| Scene and Herd Limited | Professional & scientific | 2013 |
| Seacliff Haulage Limited | Transport & logistics | 2003 |
| Seton Farms | | 1993 |
| Silvan Studio Ltd. | Manufacturing | 2021 |
| Smeaton Nursery Gardens Limited | Agriculture & fishing | 2003 |
| Sports Tune Motor Company Limited | Wholesale & retail | 1972 |
| Spott and Brunt Farming Partnership | | 1993 |
| Stonebranch UK Limited | Information & communication | 2006 |
| Stonelaws LP | | 2000 |
| Story Mill Films Ltd | Information & communication | 2001 |
| Sunnyside Farmers | | 1989 |
| Swanson Technical Services Limited | Construction | 2015 |
| T.V. & Video Repair Centre Ltd. | Manufacturing | 2002 |
| Tantallon Business Limited | Construction | 2017 |
| THE Airshed Limited | Professional & scientific | 2006 |
| THE Big HEN Ltd. | Information & communication | 2017 |
| THE Chippendale School of Furniture | Manufacturing | 1997 |
| THE Compass School | Education | 1992 |
| THE Johnscleugh Farming Partnership | | 2000 |
| THE K.O.S.B. Association Funds | Financial services | 2002 |
| THE K.O.S.B. Museum Fund | Financial services | 2002 |
| THE Malt Kiln Limited | Wholesale & retail | 2004 |
| THE Outsider Movie Company Limited | Arts & recreation | 2016 |