Tessenderlo Kerley, Inc. (TKI), headquartered in Phoenix, Arizona, is a global provider of specialty chemical solutions, including fertilizers, crop protection chemicals, and process chemicals.

With 12 manufacturing plants across North America and an extensive terminal network, TKI serves diverse markets worldwide. Part of the Tessenderlo Group, a diversified industrial organization founded in 1919 in Belgium, the company focuses on agriculture, bio-residual valorization, and industrial solutions.