X0306 4 2020-10-13 0 0001678463 Forterra, Inc. FRTA 0001267446 GRAYKEN JOHN P 2711 NORTH HASKELL AVENUE SUITE 1700 DALLAS TX 75204 0 0 1 0 0001687502 Forterra US Holdings, LLC 2711 NORTH HASKELL AVENUE SUITE 1700 DALLAS TX 75204 0 0 1 0 Common Stock 2020-10-13 4 S 0 200000 12.825 D 34907250 I See footnote These shares are held directly by Forterra US Holdings, LLC, which is indirectly controlled by John P. Grayken. 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 2020-10-13 /s/ Rafael Colorado, President of Forterra US Holdings, LLC 2020-10-13