| M Petrushkin | |
| MY Holdings | |
| Macfarlane Group | |
| Mackays of Chatham | |
| Madison Packaging | |
| Magazine Printing Company (The) | |
| Magnet Litho | |
| Mail Marketing (Holdings) | |
| Mailcom | |
| Mailforce | |
| Manor Creative | |
| Manson Group (The) | |
| Marc Wheatley Printing | |
| Martello Press | |
| Martin Shelton Group | |
| Masterspeed Press | |
| Matthews The Printers | |
| MBA Holdings | |
| MBNA Direct | |
| McCorquodale Confidential Print | |
| McGurk Studios | |
| McLaren Packaging | |
| Mead UK | |
| Medici Society, (The) | |
| Mekvale | |
| Middx Packaging | |
| Midland Screen Printers | |
| Millington York - Under construction | |
| Minuteman Press International | |
| Mirror Colour Print | |
| Mitre Press | |
| Montgomery Litho | |
| Moore IMS | |
| Moore Paragon UK | |
| MPG | |
| Mr-Microrite Systems | |
| Mullis Morgan Group | |
| Multicolour Printers | |
| Multiflow Print Limited | |
| Multiple Press | |
| Multi Signmakers | |
| Murrays the Printers | |
| MWL Print Group |