CMP was a bicycle frame and component company based in Lyon, France. The company is most closely associated with three people, Claudius Masson, his wife Claudine née Poyet, and Léon Tournier. The letters 'CMP' stands for 'Constructions Mécaniques de Précision', although it's noticeable that they are also the inititals for Claudius/Claudine Masson Poyet.

The company possibly had a wide range of products including two different derailleurs (called 'Le Synchro' and 'Le Samson') a variety of brakes, amongst which were some rather proficient looking cantilever models and a range of aluminum frames. The aluminium frames seem to have been taken up and rebranded by famous French bicycle brands, including Gitane.

The company was possibly formed in the 1920s, when Claudius Masson seems to have actively started patenting designs for bicycle parts, and appears to have been in business at least as late as the 1980s.