Providing Solutions Since 1919

Today’s Tessenderlo Kerley, Inc. is part of Tessenderlo Group, founded in 1919 and the descendent of The Kerley Chemical Company, founded in 1947 by four brothers who recognized a growing demand for sulfur plant nutrition in Pecos, Texas, shortly after the end of World War II.

The Kerley Brothers developed a unique process for manufacturing sulfur-based liquid fertilizers that are safe, easy to handle and can be applied through irrigation equipment.

In the early 1950s, Kerley Chemical opened retail stores and began selling fertilizers to farmers, retailers and distributors throughout the western United States and midwestern corn belt.

Acquisitions, ownership changes and growth guided the company through the years, while Tessenderlo Kerley established itself as a leader in the production and marketing of specialty products used in the agriculture, mining and process chemical industries. Tessenderlo Kerley is now the world’s largest producer of sulfur-based thiosulfate fertilizers.

1995, Belgium-based Tessenderlo Group acquired the Kerley business without changing the company’s focus on processing refinery byproducts into added value chemicals. Since then, the company has been operating as Tessenderlo Kerley, Inc. 

Tessenderlo Group (Euronext: TESB) is a global industrial group that focuses on agriculture, valorizing bio-residuals, machinery, mechanical engineering, electronics, energy, and industrial solutions for water management. Its belief that “Every Molecule Counts” is at the heart of the strategy of the group: Tessenderlo Group continually strives to valorize its products and processes to the maximum and to add value to everything it does. With its headquarters in Belgium, the group is active in over 100 countries and it has a global team of more than 7,500 employees. In 2023, Tessenderlo Group recorded a consolidated revenue of 2.9 billion EUR.
For more information about Tessenderlo Group, its people, its brands, and its results, please visit www.tessenderlo.com.