- Mackay, Charles
- Maggiulli, Nick
- Mandino, Og
- Mansfield-Devine, Patricia
- Marber, Brian
- Marinova Pompliano, Polina
- Martin, Bill
- Martin, Glenn
- Martinsky, Ondrej
- Matthew, Pete
- McEwen, Ruth Ann
- McGowan, Justin
- Mead, Adam J.
- Meitner, Matthias
- Melamed, Leo
- Miceli, Valeria
- Millard, Brian
- Mills, Mark
- Moglen, Richard
- Morgan, Tim
- Morris, Alex W.
- Mumford, Paul
- Mundy, Alastair
- Murphy, Ian