TO ALL STOCKHOLDERS:

NOTICE is hereby given that the Annual Meeting of the Stockholders of CONCRETE AGGREGATES CORP. will be conducted virtually on May 27, 2021, Thursday, at 10:00 a.m., through https://bit.ly/2021CACASM. The guidelines for online registration and voting through remote communication or participation in absentia are set forth in the Information Statement and may also be found in the Company’s website.