On June 20, 2019, CARBO Ceramics Inc. entered into a Second Amendment to Amended and Restated Credit Agreement and Joinder (the Credit Agreement Amendment) with the Company, as borrower, the guarantors party thereto, the lenders party thereto, and Wilks Brothers, LLC (Wilks), as administrative agent, which amends that certain Amended and Restated Credit Agreement, dated as of March 2, 2017, to, among other things, permit the Company to reborrow the Prepayment Amount (as defined in the Credit Agreement Amendment) as an incremental term loan tranche and join Equify Financial LLC as a new lender to the existing term loan facility.

On June 20, 2019, in accordance with the Stockholder Agreement, the Board increased the size of the Board from six directors to seven directors and appointed Justin H. Wilks to fill the newly created vacancy and serve as a director of the Company. Mr. Wilks' term commenced on June 20, 2019 and expires at the Annual Meeting of the stockholders of the Company in 2020. Justin Wilks currently serves as Chief Executive Officer at Equify, LLC and Chief Executive Officer of Alpine Silica. Since 2012, Mr. Wilks has also served as Senior Vice President of Wilks Brothers, LLC.