  In this contribution a summary of the activities of Working Group 5 (WG5)
presented during the 12th International Workshop on the CKM Unitarity Triangle
(CKM2023) is reported. This includes new results on $\phi_{3}/\gamma$
measurements using $B\to DK$ decays, search for $CP$ violation using charmless
$B$ decays and $b$-Baryon decays, measurement of branching ratios in hadronic
$B$ to charm decays, and theory of three-body nonleptonic $B$ decays.
