| LCC Group Limited | Wholesale & retail | 1996 |
| Leicester Square Investments Limited | Construction | 2004 |
| Linergy Group Limited | Manufacturing | 2005 |
| Linergy Power Limited | Energy | 2008 |
| M Donnelly Electrical Ltd | Energy | 1999 |
| M.B.F. Building & Civil Engineering Company Limited | Construction | 1987 |
| M.J. MC Kinney Crane Hire Ltd | Construction | 1995 |
| Macmor Limited | Real estate | 1997 |
| Main Street, Omagh Ltd | Extraterritorial | 2003 |
| Mallaghan Engineering Limited | Manufacturing | 1986 |
| Manley Investments Limited | Real estate | 1993 |
| Marsha Developments Limited | Construction | 1998 |
| Maryland Investment Properties Limited | Construction | 1992 |
| Maxwell & Mchugh Limited | Construction | 2004 |
| MC Farland Limited | Manufacturing | 2004 |
| Mcaleer & Rushe (Holdings) Ltd | Extraterritorial | 2000 |
| Mcbride Retail Lurgan Limited | Wholesale & retail | 2006 |
| Mccormack (Potato) Limited | Manufacturing | 1997 |
| Mcelhatton Poultry Ltd | Agriculture & fishing | 2006 |
| Mcelroy Fuel & Oils Limited | Wholesale & retail | 1996 |
| Mcgrath Plant Limited | Transport & logistics | 1988 |
| Mchugh Developments Limited | Real estate | 2003 |
| Meteor Online Limited | Water & waste | 2001 |
| Meteor Productions Limited | Manufacturing | 1990 |
| Meteor Space Ltd. | Transport & logistics | 2001 |
| Michael Nugent (IS) Ltd | Real estate | 2002 |
| Michael Nugent Ltd | Construction | 2001 |
| Millar Haulage Limited | Transport & logistics | 2003 |
| Miller Wholesale Ltd | Wholesale & retail | 1978 |
| Millside Foods Limited | Manufacturing | 1996 |
| Milltown Gravel Limited | Mining & quarrying | 1963 |
| Milltown Motor Services Limited | Real estate | 1974 |
| MJ FOX Engineering Limited | Manufacturing | 2007 |
| Moyway Motors | Wholesale & retail | 2002 |
| Muldoon International Transport Ltd | Transport & logistics | 2007 |
| Muldoon Transport Systems Limited | Manufacturing | 1998 |
| Mulgrew Brothers (Contractors) Limited | | 1978 |
| Mullaghmore and Castleview Community Association | Other services | 2000 |
| Mullan Poultry Ltd | Agriculture & fishing | 1999 |
| Muresan Properties Limited | Real estate | 2005 |
| New Horizons Partnership Limited | Education | 2008 |
| NI063321 Ltd | Professional & scientific | 2007 |
| Noel Mccrystal Opticians Limited | Wholesale & retail | 2005 |
| Noel Mcquaid & SON Limited | Construction | 2007 |
| North West Landscaping and Properties Limited | Administrative & support | 1994 |
| North West of Ireland Printing and Publishing Company Limited | Information & communication | 1901 |
| Ntech Solutions | | 2002 |
| NWI Contracts Limited | Construction | 2005 |
| O'Hanlon Bros Construction Limited | Construction | 1982 |
| O'Kane Plumbing & Electrics Limited | Construction | 2007 |
| O'Neill Mechanical & Electrical Services Limited | Construction | 2000 |
| O'Neill of Clonoe Limited | Construction | 1976 |
| O'Neills Irish International Sports Company Limited | Manufacturing | 1974 |
| Observer Newspapers (N.I.) Limited | Manufacturing | 1961 |
| Omagh Auction Mart Limited | Professional & scientific | 1977 |
| Omagh Community House | Other services | 1999 |
| Omagh Community Youth Choir | Other services | 2004 |
| Omagh Enterprise Company Limited | Professional & scientific | 1984 |
| P&A Mccullagh Limited | Construction | 2007 |
| P. J. Hackett Limited | Real estate | 1965 |
| P.J.P. Developments (N.I.) Limited | Construction | 1981 |
| Pacc Engineering Limited | Manufacturing | 2000 |
| Parkmain Developments LLP | | 2007 |
| Pearson-Ni Ltd | Wholesale & retail | 2007 |
| PEM Properties (NI) Limited | Administrative & support | 2006 |
| Peter Mcaleer, Limited | Financial services | 1973 |
| Phillips Logistics Limited | Transport & logistics | 2003 |
| Phoenix Integrated Primary School Ltd | Education | 2003 |
| PK Murphy Developments Ltd | Construction | 2004 |
| Pleroma Limited | Agriculture & fishing | 1972 |
| Pomeroy Attested Sales Limited | Real estate | 1960 |
| Popstar Parties Limited | | 2004 |
| Portal Properties Limited | Real estate | 1961 |
| Portrush Sportsland Limited | Arts & recreation | 2001 |
| Prims Ltd | Information & communication | 2004 |
| Pro Drive Ireland Ltd | Manufacturing | 2007 |
| Provita Eurotech Ltd | Manufacturing | 1990 |
| Q.E. 5 Limited | Professional & scientific | 2002 |
| R G Station Ltd | Wholesale & retail | 2003 |
| R&S Biomass Equipment Limited | Manufacturing | 2008 |
| R.K. Music Ltd | Information & communication | 2008 |
| RAD Cochrane Brothers Limited | Construction | 1976 |
| Rafferty Poultry Ltd | Agriculture & fishing | 2009 |
| Rascals Community Playgroup | Education | 1999 |
| REA Developments Cookstown Limited | Construction | 2006 |
| Reid Engineering (Cookstown) Limited | Construction | 2008 |
| RGM Developments Ltd | Households | 2006 |
| Richadal Limited | Construction | 2001 |
| RJM Wilson (Properties) Ltd | Real estate | 2000 |
| Roan Developments Ltd | Construction | 1995 |
| Robert Henderson & Sons Limited | Real estate | 1954 |
| Rocks Lodge Trout Farm Limited | Agriculture & fishing | 1980 |
| Ross Martin (Cookstown) Limited | Real estate | 2006 |
| Rural Community Network (NI) | Administrative & support | 1996 |
| S & a Monaghan Builders Limited | Construction | 2001 |
| S a Nutrition Ltd | Agriculture & fishing | 2022 |
| S.A. Trotter Limited | Wholesale & retail | 2003 |
| Scott Engineering of Omagh Limited | Construction | 1983 |
| Sean Kelly Commercials Ltd | Administrative & support | 2007 |
| Sean Mcglone Limited | Construction | 2002 |