Created in 1990, SPSO (Société de Profilage Secteur Ouest) is a production subsidiary of the French group USINOR, near Rennes. It became SPO in 1999. In 2008, SPO created PMO, in the Gers, specialising in thin profiles for use as purlins (for roofing), rails (for cladding) and joists (for floors). In July 2010, SPO-PMO joined the FILA Group (based in Martinique) and became its subsidiary in mainland France. In 2017, SPO created the commercial brand Artéface to market its façade products: slats and cassettes.