TMR may refer to: Companies Tokio Millennium Re Ltd., is a reinsurance company headquartered in Bermuda Transports de Martigny et Régions, a Swiss railway company People Matthew Berry (born 1969), known as TMR, a fantasy football player The Mexican Runner or Piotr Delgado Kusielczuk, a speedrunner TM Revolution, the Japanese musician Takanori Nishikawa Other uses Aguenar – Hadj Bey Akhamok Airport, IATA airport identifier Department of Transport and Main Roads, Queensland, Australia Jewish Babylonian Aramaic, ISO 639-3 language code Mount Royal, Quebec, Canada Rolls-Royce Thrust Measuring Rig, VTOL aircraft Tetramethylrhodamine, a derivative of rhodamine Catalog numbers of Third Man Records Total Mixed Ration, a method of feeding cattle Transmyocardial revascularization, heart disease treatment Triple modular redundancy, a computing voting system Tunnel magnetoresistance Trout Mask Replica, an experimental rock album by Captain Beefheart & His Magic Band