Renormalization of B-meson distribution amplitudes

We summarize a recent calculation of the evolution kernels of the two-particle B-meson distribution amplitudes ${\varphi }_{+}$ and ${\varphi }_{-}$ taking into account three-particle contributions. In addition to a few phenomenological comments, we give as a new result the evolution kernel of the combination of three-particle distribution amplitudes ${\mathrm{\Psi }}_A-{\mathrm{\Psi }}_V$ and confirm constraints on ${\varphi }_{+}$ and ${\varphi }_{-}$ derived from the light-quark equation of motion.