X0306 4 2016-03-18 1 0001592480 Continental Building Products, Inc. CBPX 0001267446 GRAYKEN JOHN P 2711 NORTH HASKELL AVENUE SUITE 1700 DALLAS TX 75204 0 0 1 0 0001598285 Lone Star Management Co. VIII, Ltd. WASHINGTON MALL, STE. 304 7 REID STREET HAMILTON, HM 11 D0 Bermuda BERMUDA 0 0 1 0 0001598316 Lone Star Partners VIII, L.P. WASHINGTON MALL, STE. 304 7 REID STREET HAMILTON, HM 11 D0 Bermuda BERMUDA 0 0 1 0 0001572538 LSF VIII International Finance, L.P. WASHINGTON MALL, STE. 304 7 REID STREET HAMILTON, HM 11 D0 Bermuda BERMUDA 0 0 1 0 0001598310 LSF8 Gypsum Holdings, L.P. 2711 NORTH HASKELL AVENUE SUITE 1700 DALLAS TX 75204 0 0 1 0 Common Stock 2016-03-18 4 S 0 5106803 16.10 D 900000 I See footnote Common Stock 2016-03-18 4 S 0 900000 16.10 D 0 I See footnote These shares are held directly by LSF8 Gypsum Holdings, L.P ("Gypsum"). John P. Grayken controls and is the sole owner of Lone Star Management Co. VIII, Ltd., which controls and is the general partner of Lone Star Partners VIII, L.P., which controls and is the general partner of LSF VIII International Finance, L.P., which controls Gypsum. Each of the reporting persons disclaims beneficial ownership of the shares except to the extent of such reporting person's pecuniary interest therein. /s/ William D. Young, attorney-in-fact for John P. Grayken 2016-03-18 /s/ Sandra Collins, Vice President of Lone Star Management Co.VIII, Ltd. 2016-03-18 /s/ Sandra Collins, Vice President of Lone Star Management Co.VIII, Ltd., the general partner of Lone Star Partners VIII, L.P. 2016-03-18 /s/ Sandra Collins, Vice President of Lone Star Management Co. VIII, Ltd., the general partner of Lone Star Partners VIII, L.P., the general partner of LSF VIII International Finance, L.P. 2016-03-18 /s/ Kyle S. Volluz, Vice President of LSF8 GenPar, LLC, the general partner of LSF8 Gypsum Holdings, L.P. 2016-03-18