The present disclosure relates to solid forms of 3-(5-Fluorobenzofuran-3-yl)-4-(5-methyl-5H-[1,3]dioxolo [4,5-f]indol-7-yl) pyrrole-2,5-dione, processes for preparation thereof, pharmaceutical compositions thereof, and uses thereof in treating disease.La présente invention concerne des formes solides de 3-(5-Fluorobenzofuran-3-yl)-4-(5-méthyl-5H-[l,3]dioxolo[4,5-f]indol-7-yl) pyrrole-2,5-dione, leurs procédés de préparation, des compositions pharmaceutiques de celles-ci et leurs utilisations dans le traitement de maladies.