GAIAOSE S.A. is a Greek state-owned[2] property management company that owns and operates real estate of the Greek railway network, such as stations.[3][4] From 2014 to 2025, it also managed and leased rolling stock to train operating companies, such as Hellenic Train (formerly TrainOSE).[5]
GAIAOSE was created on 3 October 2001, as a railway real estate subsidiary of the Hellenic Railways Organisation (OSE, now part of Greek Railways).[1]
In October 2025, Greek Railways took over the management of rolling stock from GAIAOSE, leaving GAIAOSE in charge of developing and managing railway real estate, including stations.[8] The transfer of rolling stock from GAIAOSE occurred as part of the restructuring of the Greek railway network in the aftermath of the Tempi train crash in 2023.[9][10]
GAIAOSE is responsible for the development and management of railway real estate, including stations: from 17 December 2014 until October 2025, the company also maintained and leased rolling stock, most of which were being used by Hellenic Train (formerly TrainOSE).[8][11]
According to the official website, the board of directors of GAIAOSE consists of:[12]
