David A. Harrison

ElkCorp. manufactures roofing and building products. It primarily manufactures and sells roofing & composite building products in the United States and Canada. The company makes & sells steep-slope, low-slope architectural shingles and related accessory like ventilation products, including starter-strip products. It was founded in 1955 and is headquartered in Dallas, TX

Standard Industries, Inc. engages in the design, manufacture, and sale of roofing and waterproofing products. The firm offers solar residential program, fiber cement siding, adhesive, primers and sealants, and modified bitumen roofing. The company was founded in 1886 and is headquartered in New York, NY.

LOGIC Devices, Inc. operates as a fabless semiconductor company, which engages in development and sale of digital integrated circuits. Its products include enable video display, transport, editing, composition, special effects, and the high performance and high density storage of electronic information. The company was founded by William J. Volz in April 1983 and is headquartered in Sunnyvale, CA.