Fordbyggnaden Stockholms frihamn, Industrial building in Frihamnen, Stockholm, Sweden.

Fordhuset, also called Magasin 10, is a single-storey assembly hall at Tullvaktsvägen 11 in Stockholm's Frihamnen, built 1929–1931 to Uno Åhrén's functionalist design for Ford. Three steel-truss naves span 150 by 75 metres, with 24-metre clear spans; the high north nave rises 11.70 metres under a travelling crane, while two lower naves reach 4.60 metres. A three-storey office wing occupies the west end.

Ford Motor Company built the assembly plant in 1929–1931 to a design by Uno Åhrén, with Hjalmar Granholm as engineer and Olle Engkvist as contractor. Cars arrived as knocked-down kits to avoid import duties. A second bay added in 1947, planned by Ford Werke AG in Cologne, brought a moving assembly line. Ford left for Sollentuna in 1994; Wihlborgs bought the building in 2002 and converted it for Nasdaq OMX.

The building is known as Fordhuset, or Magasin 10, from its time as Ford's Swedish assembly plant. Cars arrived as Completely Knocked-Down kits packed in crates and were assembled here; later, finished vehicles were imported instead. Since 2003 the offices of Nasdaq OMX have occupied the converted halls.

Fordhuset stands at Tullvaktsvägen 11 in Frihamnen, the free port in southeastern Stockholm, and now houses Nasdaq OMX offices with around 1,500 workplaces. The building is in active office use, so the interior is not open to visitors; the glass-and-steel facades and the 1947 southern extension can be seen from the surrounding streets. The property is blue-marked by the City Museum, and any change to the facades requires the museum's consent.

The building benefited from its location in Stockholm's free port zone, which allowed raw materials and finished products to be moved directly by ship. This strategic position made it an ideal site for assembling automobiles on a large scale in Sweden.