HERNDON, Va.--(BUSINESS WIRE)--Continental Building Products, Inc. (NYSE:CBPX) (the “Company”) today announced that its largest stockholder, an affiliate of Lone Star Funds (the “Selling Stockholder”) intends to offer for sale in an underwritten secondary offering 4,600,000 shares of its common stock pursuant to the Company's shelf registration statement filed with the Securities and Exchange Commission (the “SEC”). The underwriter has a 30-day option to purchase up to an additional 690,000 sha