Zoltek Companies, Inc. is engaged in the commercialization of carbon fiber through its development of reinforcement for composites used in a range of commercial products, which it sells under the Panex trade name. In addition to manufacturing carbon fiber, the Company produces an intermediate product, a stabilized and oxidized acrylic fiber used in flame- and heat-resistant applications, which it sells under the Pyron trade name. The Company operates in three separate business segments: carbon fiber segment, technical fiber segment and corporate/other segment, which consists of ancillary activities not directly related to the carbon fiber or technical fiber segments.