Sikorsky Headquarters Stratford, Connecticut

This plant is the home of Sikorsky Aircraft. Sikorsky was a pioneer in helicopter technology, leading advances that allowed these crafts to become commonplace. The company was founded by Igor Sikorsky in 1925. For most of its existence it was owned by United Technologies, the aviation and tech conglomerate based in Connecticut. Before WWII, it designed and built fixed-wing aircraft, turning to rotary aircraft mostly after the war. It has designed and built dozens of helicopter types, including the heavy lifting Sky Crane, and military helicopters like the Blackhawk, Pavehawk and Seahawk, and supplied the presidential helicopters since 1957. It has manufacturing facilities here and at a few other locations in Connecticut (Trumbull, Shelton, and Bridgeport), as well as at Fort Worth and Grand Prairie, Texas; West Palm Beach, Florida; Coatesville, Pennsylvania; and Huntsville and Troy, Alabama. Sikorsky was purchased by Lockheed in 2015 for $9 billion.