Mandvi Chowk Derasar in Rajkot is a Śvetāmbara Jain temple. It is traditionally managed by the local Śvetāmbara Jain Sangh / trust that runs Shri Suparshvnath Jinalaya at Mandvi Chowk (Dera Street), Rajkot. In short, it is not owned by an individual but by a temple trust/sangh that oversees the derasar and its activities. You can read more about this derasar here .