{{Short description|Greek state-owned public service company}} {{Use dmy dates|date=October 2020}} {{Infobox company | name = GAIAOSE S.A. | type = Private Anónimi Etaireía | logo = | logo_size = 190px | image = | image_size = 300px | hq_location_city = 301 Liossion street, 10445 Athens | hq_location_country = Greece | industry = Rail transport | owner = Greek Government (100%) | parent = | products = Railway property management | predecessor = {{plainlist| * {{lang|de|italic=no|OSE}} (1970–2001)}} | founded = {{start date and age|2001|10|03|df=yes}}<ref name="gaiaose-history">{{cite web|title=Ιστορικό Εταιρείας|url=https://www.gaiaose.com/η-εταιρεία/|website=GAIAOSE|access-date=1 January 2026|archive-url=https://web.archive.org/web/20260101214425/https://www.gaiaose.com/η-εταιρεία/|archive-date=1 January 2026|location=Athens|language=el|trans-title=Company History}}</ref> | fate = | successor = Greek Railways (rolling stock) | area_served = Greece | revenue = | net_income = | num_employees = | key_people = {{ubl | Konstantinos Kesentes (chair) | Panagiotis Balomenos (CEO) }} | website = {{url|www.gaiaose.com}} {{in lang|el}} }}
'''GAIAOSE S.A.''' ({{langx|el|ΓΑΙΑΟΣΕ Α.Ε.}}) is a Greek state-owned<ref>{{cite web |title=EDP dialogue visit to Greece |url=https://ec.europa.eu/eurostat/documents/1015035/12938158/EDP+DV+to+Greece+on+22-23+and+27+September+2021+-+Final+Findings.pdf/8c6e5de0-f818-4fff-3d11-feb717365192?t=1669988808537 |website=EUROSTAT |access-date=27 March 2024}}</ref> property management company that owns and operates real estate of the Greek railway network, such as stations.<ref>{{cite news |title=Major overhaul planned for Greek railways {{!}} eKathimerini.com |url=https://www.ekathimerini.com/economy/1227553/major-overhaul-planned-for-greek-railways/ |access-date=27 March 2024 |work=www.ekathimerini.com |date=20 December 2023 |language=English}}</ref><ref>{{cite web |title=GAIAOSE launched an international tender for the concession of the Thriasian Freight Transport Centre {{!}} Zepos & Yannopoulos |url=https://www.zeya.com/newsletters/gaiaose-launched-international-tender-concession-thriasian-freight-transport-centre |website=www.zeya.com |access-date=27 March 2024}}</ref> From 2014 to 2025, it also managed and leased rolling stock to train operating companies, such as Hellenic Train (formerly TrainOSE).<ref>{{cite news |title=Interview with Mr. Nicolaou Perikles, CEO of GAIAOSE |url=https://prisma-reports.com/interview-with-mr-nicolaou-perikles-ceo-of-gaiaose/ |access-date=27 March 2024 |work=PRISMA REPORTS |date=11 December 2019}}</ref>
==History== GAIAOSE was created on 3 October 2001, as a railway real estate subsidiary of the Hellenic Railways Organisation (OSE, now part of Greek Railways).<ref name="gaiaose-history"/> According to ''Kathimerini'' in June 2002, GAIAOSE was the second largest landowner (after the Church of Greece), with a total property value of €2 billion (US${{To USD|2|EUR|year=2002}} billion).<ref>{{cite news |title=OSE set to cash in on land {{!}} eKathimerini.com |url=https://www.ekathimerini.com/economy/6576/ose-set-to-cash-in-on-land/ |access-date=27 March 2024 |work=www.ekathimerini.com |date=20 June 2002 |language=English}}</ref> In December 2014, GAIAOSE became the administrator for the railway rolling stock, at the behest of the Greek State.<ref name="gaiaose-history"/> In 2023, 123 older, disused and condemned rolling stock units were set for auction in the first pilot scrapping project, as part of the fleet management program of the Ministry of Infrastructure and Transport.<ref>{{cite web |title=Environmental and economic gains through GAIAOSE's auction of old rolling stock |url=https://growthfund.gr/wp-content/uploads/2023/12/dimoprati_gaiose_en.pdf |website=Growthfund.gr |access-date=27 March 2024}}</ref>
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.<ref name="ethnos-20251017">{{cite news|last1=Liliopoulou|first1=Maria|title=Ο ΟΣΕ… κληρονομεί τρένα, μισθώματα αλλά και εκκρεμότητες από τη ΓΑΙΑΟΣΕ - Τι αλλάζει|url=https://www.ethnos.gr/greece/article/384798/ooseklhronomeitrenamisthomataallakaiekkremothtesapothgaiaosetiallazei|access-date=2 January 2026|work=Ethnos|agency=Radiotileoptiki (OPEN Digital Group)|publisher=Dimera Media|date=17 October 2025|archive-url=https://archive.today/20260102040556/https://www.ethnos.gr/greece/article/384798/ooseklhronomeitrenamisthomataallakaiekkremothtesapothgaiaosetiallazei|archive-date=2 January 2026|location=Athens|language=el|trans-title=OSE… inherits trains, rents and pending issues from GAIAOSE - What changes?}}</ref> 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.<ref name="ert-20250830">{{cite news|last1=Koukos|first1=Ilias|title=Tέλος εποχής για τον ΟΣΕ – Παρουσιάστηκε η Διοίκηση της «Σιδηρόδρομοι Ελλάδος Α.Ε.»|url=https://www.ertnews.gr/roi-idiseon/telos-epoxis-gia-ton-ose-parousiastike-i-dioikisi-tis-sidirodromoi-ellados-a-e/|access-date=28 September 2025|work=ERT News|publisher=ERT|date=30 August 2025|archive-url=https://web.archive.org/web/20250928063253/https://www.ertnews.gr/roi-idiseon/telos-epoxis-gia-ton-ose-parousiastike-i-dioikisi-tis-sidirodromoi-ellados-a-e/|archive-date=28 September 2025|location=Athens|language=el|trans-title=End of an era for OSE – the management of Greek Railways S.A. was presented}}</ref><ref name="irj-20250912">{{cite web|last1=Smith|first1=Kevin|title=Greek Railways formed in major restructuring|url=https://www.railjournal.com/policy/greek-railways-formed-in-major-restructuring/|website=International Railway Journal|publisher=Simmons-Boardman Publishing|access-date=2 January 2026|archive-url=https://web.archive.org/web/20251113234959/https://www.railjournal.com/policy/greek-railways-formed-in-major-restructuring/|archive-date=13 November 2025|location=Omaha|date=12 September 2025}}</ref>
==Activity== 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).<ref name="ethnos-20251017"/><ref name="law-4313-2014">[https://ia37rg02wpsa01.blob.core.windows.net/fek/01/2014/20140100261.pdf Law 4313/2014], 17 December 2014 (FEK A' 261/17.12.2014). [https://web.archive.org/web/20260101230530/https://ia37rg02wpsa01.blob.core.windows.net/fek/01/2014/20140100261.pdf Archived] from the original on 1 January 2026. Retrieved 1 January 2026.</ref>
==Company management==
According to the official website, the board of directors of GAIAOSE consists of:<ref name="gaiaose-board">{{cite web|title=Διοικητικό Συμβούλιο|url=https://www.gaiaose.com/διοικητικό-συμβούλιο/|website=GAIAOSE|access-date=2 January 2026|archive-url=https://web.archive.org/web/20260102050036/https://www.gaiaose.com/διοικητικό-συμβούλιο/|archive-date=2 January 2026|location=Athens|language=el|trans-title=Board of Directors}}</ref>
* Konstantinos Kesentes, chair * Panagiotis Balomenos, chief executive officer * Nikolaos Zervas * Martha Kavvatha * Konstantinos Mangouras * Athanasios Chondrogiannis
==Notes and references== {{Reflist|30em}}
==External links== *{{official website|https://www.gaiaose.com/ Official website}} {{in lang|el}}
{{Railways in Greece}}
{{authority control}}
Category:Railway companies of Greece Category:Government-owned companies of Greece Category:Railway infrastructure managers Category:Railway companies established in 2001 Category:2001 establishments in Greece