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- A. C. McClurg
- McClelland and Stewart
- Macmillan Publishers
- Mainstream Publishing
- Mandrake of Oxford
- Mandrake Press
- Manchester University Press
- Manor House Publishing
- Mapin Publishing
- Marion Boyars Publishers
- Mark Batty Publisher
- Marshall Cavendish
- Marshall Pickering a Christian imprint of HarperCollins
- Martinus Nijhoff Publishers an imprint of Brill
- Mascot Books
- Matthias Media
- McGraw-Hill
- Medknow Publications
- Melbourne University Publishing
- Methuen Publishing
- Michael Joseph
- Michael O'Mara Books
- Michigan State University Press
- Microsoft Press publishing arm of the software company
- The Miegunyah Press
- Miles Kelly Publishing
- Mills & Boon
- Minerva Press
- Mirage Publishing (UK) Mind, Body & Spirit and Self Help
- MIT Press
- Mkuki na Nyota
- Modern Library
- John Murray
- Mycroft & Moran an imprint of Arkham House
Read more about this topic: List Of English-language Book Publishing Companies