Simpson Manufacturing Company is a building materials manufacturer in the United States that produces structural connectors, fasteners, anchors, and products for new construction and retrofitting.
The company was founded by Barclay Simpson in Oakland in 1956, as a successor to a window screen company owned by his father, Walter Simpson.Sam Whiting, "Barclay Simpson, philanthropist and building supplies titan, dies", San Francisco Chronicle, November 18, 2014. Simpson manufactured joist hangers and the company's subsidiary Simpson Strong-Tie Co. Inc. became a dominant producer of structural connectors in North America and Europe. The company subsequently moved to Pleasanton and went public in 1994.Neil Henry, "Barclay Simpson: An Oral History", Regional Oral History Office, The Bancroft Library, University of California, Berkeley, 2012–13.
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