TransMedics, Inc. is a medical technology company headquartered in Andover, Massachusetts, USA. Their primary focus is on organ preservation and transplantation, specifically developing and commercializing technologies that extend the viability of donor organs for transplantation. The company's core mission revolves around improving organ transplantation outcomes through innovative organ preservation solutions.

Their flagship technology is the Organ Care System (OCS), a family of perfusion and preservation devices designed to maintain the viability and function of donor hearts, lungs, and livers during the crucial period between organ procurement and transplantation. These OCS devices are used in hospitals and transplant centers worldwide. Instead of passively storing organs in cold preservation solutions, the OCS actively perfuses organs with a specially formulated solution, mimicking the physiological conditions of the body. This process aims to reduce organ injury, improve the quality of transplanted organs, and ultimately enhance the chances of successful transplantation and patient survival.