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SWEG Südwestdeutsche Landesverkehrs-GmbH is a transport company that operates bus and train services in Baden-Württemberg and was founded in 1962.
In recent years, SWEG took over the following four companies: Ortenau-S-Bahn GmbH (OSB) in 2014 and Breisgau-S-Bahn GmbH (BSB) in 2017 (both originally subsidiaries of SWEG), Hohenzollerische Landesbahn AG (HzL) in 2018 and Abellio Rail Baden-Württemberg GmbH (ABRB) in 2022, which is now called SWEG Bahn Stuttgart GmbH (SBS). Except for the latter, all other names continue to exist as brands to this day.