Trecora Resources history

Arabian Shield Development Company became a publicly traded company in 1972.

In 1987 an opportunity in the hydrocarbon field in the US presented itself on very attractive terms.

Chusei (United StatesA.) Inc. was established as a Texas corporation in September 1989, initially as a wholly owned subsidiary of Chusei Oil Company, Ltd., a privately held company with headquarters in Okayama, Japan.

In June of 1991, a 20 acre plant site was selected and construction began at the site in October of that year.

The construction phase was completed in November 1992, toll processing quickly becoming a major focus of the Company, supported by incremental expansions of the Bayport site in order to serve growing customer needs.

This development led to the establishment of Phyto-Source, L.P., for the manufacturing and marketing of wood based sterols. It was in conjunction with its tolling business that Chusei became involved with phytosterols production in 1996.

In 2000 the Company changed its name from Arabian Shield to Arabian American Development Company.

By 2006 the Company realized that completing the mine complex including the processing mill was going to cost considerably more than originally expected.

Al-Masane Al-Kobra or ‘AMAK’ was formed in 2008.

In April 2009 Chusei (United StatesA.) sold the Phyto-Source L.P. plant assets to COGNIS Corporation.