Private company

TAG Immobilien AG

Logo: Unknown author Unknown author, Public domain, via Wikimedia Commons4

Property company

TAG Tegernsee Immobilien und Beteiligungs-AG (TAG Tegernsee Property and Holding Company) is a property company from Germany with its head office in Hamburg. Until 1998 as Tegernsee-Bahn (Tegernsee Railway) it operated the railway line from Schaftlach via Gmund to Tegernsee. The company is listed in the share index, MDAX.2 Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

1882Founded1
  • Industryreal estate industry1
  • HeadquartersHamburg1
  • Websitewww.tag-ag.com
  • Legal formAktiengesellschaft1
  • LEI529900TAE68USJNXLR593
  • StatusActive3
  • LEI statusIssued and current3
  • Registered addressSteckelhörn 5, 20457 Hamburg, Germany3
  • Registered withLocal Court Hamburg, HRB 1067183

TAG Tegernsee Immobilien und Beteiligungs-AG (TAG Tegernsee Property and Holding Company) is a property company from Germany with its head office in Hamburg. Until 1998 as Tegernsee-Bahn (Tegernsee Railway) it operated the railway line from Schaftlach via Gmund to Tegernsee. The company is listed in the share index, MDAX.2

Corporate structure

TAG Immobilien AG sits at the top of its group. 12 entities, 2 countries on record. Switch between the flow chart and the network, and select any entity to see its details.

  • TAG Immobilien AG Hamburg, Germany
    • Colonia Real Estate Hamburg, Germany
    • Bau-Verein zu Hamburg Immobilien GmbH Subsidiary · Hamburg, Germany
    • Bau-Verein zu Hamburg Wohnungsgesellschaft mbH Subsidiary · Hamburg, Germany
    • Colonia Portfolio Berlin GmbH Subsidiary · Hamburg, Germany
    • FC REF I GmbH Subsidiary · Grünwald, Germany
    • TAG Beteiligungs- und Immobilienverwaltungs GmbH Subsidiary · Hamburg, Germany
    • TAG Beteiligungsverwaltungs GmbH Subsidiary · Hamburg, Germany
    • TAG NRW-Wohnimmobilien & Beteiligungsgesellschaft mbH Subsidiary · Hamburg, Germany
    • TAG Portfolio Thüringen GmbH & Co. KG Subsidiary · Hamburg, Germany
    • TAG Wohnen GmbH Subsidiary · Hamburg, Germany
    • VANTAGE DEVELOPMENT SPOLKA AKCYJNA (VANTAGE DEVELOPMENT SPÓŁKA AKCYJNA) Subsidiary · Wrocław, Poland

Built from parent and subsidiary links from GLEIF, the Global Legal Entity Identifier Foundation (CC0). Each entity in the chart links to its source.

The story

History of the Tegernseebahn

The company emerged from what was originally called the Eisenbahn-Actiengesellschaft Schaftlach-Gmund (Schaftlach-Gmund Railway Company Ltd), founded in 1882, which built the 7.6 km long railway line between these villages. It is suspected that Ferdinand von Miller, amongst others, played a decisive role. From 1896 the line was extended by 4.8 km to Tegernsee; in 1902 the first train ran to Tegernsee and the company was renamed the Eisenbahn-Actiengesellschaft Schaftlach-Gmund-Tegernsee or EAG (Schaftlach-Gmund-Tegernsee Railway Company Ltd). In 1942 the name was shortened to Tegernsee-Bahn Aktiengesellschaft (Tegernsee Railway Company Ltd) and, in 1983, running powers were transferred to the new subsidiary Tegernsee-Bahn Betriebsgesellschaft mbH or TBG (Tegernsee Railway Operating Company Ltd).

The operation of the line has been rented out since 1998 for 15 years to the Bayerische Oberlandbahn (BOB), that previously had the state concession for the operation of railway services in the Bavarian Oberland. The BOB has continued to use the railway infrastructure of the Tegernsee-Bahn. The running and rolling stock was given up by the Tegernsee-Bahn in 1999 as they no longer needed it. Since 2002 the TBG has once again had its own locomotive, the TAG 15. This former DB Class Köf III is used for snow plough runs and construction train work.

The Tegernsee-Bahn Betriebsgesellschaft is a member of the Fare Association of Federal and Private Railways in Germany (Tarifverband der Bundeseigenen und Nichtbundeseigenen Eisenbahnen in Deutschland or TBNE).

History of the property and holding company

Following the cessation of its railway operation in 1998, as a result of the concession being given to a competitor, the business of the TAG AG became limited to the maintenance and rental of property and land that belonged to the railway (trackage, stations at Gmund and Tegernsee) as well as land no longer needed for railway operations and the cash assets. An investors group including investor, Rolf Hauschildt, and property manager, Lutz Ristow, initially took over a share and posts on the board of directors; later Ristow was also the Vorstandsmandat for a short time. The firm was reorganised into a property and holding company, and was renamed in 1999 to TAG Tegernsee Immobilien und Beteiligungs-AG. In January 2001, as part of its expansion into property, the TAG bought 75% of the non-public Berliner JUS AG, which had specialised in refurbishing and modernising property under historical protection orders. Its manager, Michael Haupt, joined the TAG's board. Its share was increased in 2002 to 94%. In June 2001, 44% of the public Bau-Verein zu Hamburg AG was bought; through a swap action and further purchase its share rose in early 2002 to 88%, but fell again afterwards to today's 69%. Likewise, in 2001 the non-public project development and preservation company AGP AG Munich was taken over. In November 2002, the Real Immobilien GmbH was founded, together with a subsidiary, Sachsen LB, into which properties in need of repair were bundled.

From Wikipedia’s article on TAG Tegernsee Immobilien und Beteiligung, shared under CC BY-SA 4.0.5

Products and brands

TAG Immobilien AG operates as a holding company for a large number of subsidiaries. Key operational units include:

TAG Wohnen GmbH: The primary management company for the group's residential portfolio.

TAG Colonia-Immobilien AG: A major subsidiary (approx. 84.1%) focused on residential holdings, formerly known as Colonia Real Estate AG.

Bau-Verein zu Hamburg Immobilien GmbH: A historic real estate developer in the Hamburg region, fully integrated into the group.

Read the full text

TAG Handwerkerservice GmbH: Provides facility management and repair services for the group's properties.

ROBYG S.A.: A significant Polish property developer acquired in 2022 to expand TAG's presence in the Eastern European market.

As of 2025, the group holds interests in over 80 subsidiaries, including various regional housing companies.

From Wikipedia’s article on TAG Tegernsee Immobilien und Beteiligung, shared under CC BY-SA 4.0.5

Subsidiaries and ownership

Subsidiaries (GLEIF)

Ownership links from GLEIF, the Global Legal Entity Identifier Foundation (CC0); each one cites its LEI record.

Timeline

  1. 1882Founded Founded1