Item 5.01 Changes in Control of Registrant.

The disclosure set forth in Amendment No. 31 to Schedule 13D regarding the registrant's Class A common stock and filed by NL Industries, Inc., Kronos Worldwide, Inc., Valhi, Inc., Dixie Rice Agricultural L.L.C., Contran Corporation, Lisa K. Simmons and the Harold C. Simmons Family Trust No. 2 with the U.S. Securities and Exchange Commission on April 28, 2020 reporting a change in control of the registrant on April 22, 2020 is incorporated herein by reference.

--------------------------------------------------------------------------------

© Edgar Online, source Glimpses