On June 1, 2018, Covia Holdings Corporation (formerly known as Unimin Corporation and referred to herein as the ‘Company'), consummated the business combination transaction contemplated by the Agreement and Plan of Merger, dated as of December 11, 2017 by and among the company, Fairmount Santrol Holdings Inc., Bison Merger Sub Inc. and Bison Merger Sub I, LLC. Pursuant to the Merger Agreement, on June 1, 2018, Merger Sub merged with and into Fairmount Santrol, with Fairmount Santrol continuing as the surviving corporation followed immediately by the merger of Fairmount Santrol with and into Merger Sub LLC, with Merger Sub LLC continuing as the surviving entity and a direct wholly owned subsidiary of the company. On June 5, 2018, the Board established an Audit Committee, a Compensation Committee, a Governance Committee and an Executive Committee and appointed the following directors to serve as members of the committees: Audit Committee; Richard A. Navarre (Chairperson), Michel Delloye and Stephen J. Hadden, Compensation Committee: Jean-Pierre Labroue (Chairperson), Jeffrey Scofield and William P. Kelly, Governance Committee: William E. Conway (Chairperson), Jean-Pierre Labroue and Charles D. Fowler, Executive Committee; Richard A. Navarre (Chairperson), Jenniffer D. Deckard, Kurt Decat, Jean-Luc Deleersnyder, Olivier Lambrechts and Matthew F. LeBaron.

On June 1, 2018, Messrs. Campbell J. Jones and Andrew D. Eich, who were members of the Board immediately prior to the closing of the Merger, resigned from the Board (but continued to serve as executive officers of the Company). Mr. Deleersnyder, who was a member of the Board immediately prior to the closing of the Merger, continued as a director of the Company.

Mr. Deleersnyder is the Chief Executive Officer of Sibelco, Mr. Decat is the Chief Financial Officer of Sibelco and Mr. Lambrechts is the Executive Vice President of Corporate Development of Sibelco.