Hollandsche IJzeren Spoorweg-Maatschappij

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Hollandsche IJzeren Spoorweg-Maatschappij

Former headquarters of the HSM, built across the street from their main station in Amsterdam.
Overview
Headquarters	Amsterdam
Locale	Netherlands
Dates of operation	1839–1938
Successor	Nederlandse Spoorwegen
Technical
Track gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge
Previous gauge	1,945 mm (6 ft 4+9⁄16 in) until 1866[1]

The Hollandsche IJzeren Spoorweg-Maatschappij (Dutch pronunciation: [ˈɦɔlɑntsə ˈɛizərə(n) ˈspoːrʋɛxmaːtsxɑˌpɛi]) or HSM (Hollands Iron Railway-Company) was the first railway company in the Netherlands founded on 8 August 1837 as a private company, starting operation in 1839 with a line between Amsterdam and Haarlem. The company remained operational until 1938, when it merged with the Maatschappij tot Exploitatie van Staatsspoorwegen (SS) to form the Nederlandse Spoorwegen (NS).