What is "zoltek"

Zoltek (till year 2014 listed on NASDAQ: ZOLT) is a materials company headquartered in St. Louis, MO that engages in the development, manufacture, and marketing of commercial carbon fiber for various applications. Their primary customers are in the sectors of wind energy, alternative energy, lightweight automobiles, construction and infrastructure, and oil exploration.

Zoltek sells commercial carbon grade carbon fibers under the Panex trade name, and oxidized acrylic fiber under the Pyron trade name.