The present disclosure relates to co-crystals comprising N-[2,4-bis(1,1-dimethylethyl)-5-hydroxyphenyl]-1,4-dihydro-4-oxoquinoline-3-carboxamide (Compound 1) and a co-former and methods for their preparation. The present disclosure further relates to pharmaceutical compositions comprising the co-crystal forms, as well as methods of treatment therewith and kits.