Simpson Manufacturing Co., Inc., through its subsidiaries, designs, engineers, manufactures, and sells wood and concrete building construction products. The company offers wood construction products, including connectors, truss plates, fastening systems, fasteners, shearwalls, and pre-fabricated lateral systems that are used in light-frame construction; and concrete construction products comprising adhesives, specialty chemicals, mechanical anchors, carbide drill bits, powder actuated tools, fiber reinforced materials, and other repair products for use in concrete, masonry, and steel construction, as well as for concrete construction repair, protection, and strengthening applications, which include grouts, coatings, sealers, mortars, fiberglass and fiber-reinforced polymer systems, and asphalt products. It also provides connectors and lateral products for wood framing, timber and offsite construction, mid-rise steel construction, and cold formed steel applications; fasteners, which include various nails, screws, and staples for decking, subfloors, drywall, and roofing applications; and mechanical anchors for concrete and masonry construction applications. In addition, the company offers engineering and design services, as well as software solutions that facilitates the specification, selection, and use of its products. It markets its products to the residential construction, light industrial and commercial construction, remodeling, and do-it-yourself markets in the United States, Canada, France, the United Kingdom, Germany, Denmark, Switzerland, Portugal, Poland, the Netherlands, Belgium, Spain, Sweden, Norway, Australia, New Zealand, China, Taiwan, and Vietnam. Simpson Manufacturing Co., Inc. was founded in 1956 and is headquartered in Pleasanton, California.