Marvin E. Lesser

USG Corp. engages in the manufacture and sale of building materials and solutions. It offers products for use in new residential, new nonresidential, and residential and nonresidential repair and remodel construction, as well as products used in certain industrial processes. It operates through the following segments: U.S. Wallboard and Surfaces; U.S. Performance Materials; U.S. Ceilings; Canada; and Other. The company was founded in 1902 and is headquartered in Chicago, IL.

Pioneer Cos., Inc. manufactures and distributes chemical and related products. Its products include chlorine and caustic soda. The company was founded in 1988 and is headquartered in Houston, TX.

Golfsmith International Holdings, Inc. engages in the operation of specialty stores. It offers golf and tennis equipment, apparel, footwear, and accessories. The company was founded by Carl Paul and Barbara Paul in 1967 and is headquartered in Austin, TX.

DUSA Pharmaceuticals, Inc. is an integrated dermatology pharmaceutical company, which develops and markets Levulan Photodynamic Therapy technology platform for the prevention and treatment of dermatological skin conditions. Its products include levulan kerastick, BLU-U and clindareach. The company was founded by D. Geoffrey Shulman on February 21, 1991 and is headquartered in Wilmington, MA.

Sigma Partners (Sigma Partners) is a venture capital firm founded in 1984 by J. Burgess Jamieson and C. Bradford C. Jeffries. The firm is headquartered in Danville, California.