  The Yangian level-one hypercharge generator for the super Wilson loop in N =
4 supersymmetric Yang-Mills theory is constructed. Moreover, evidence for the
presence of a corresponding symmetry generator at all higher levels is
provided. The derivation is restricted to the strong-coupling description of
the super Wilson loop and based on the construction of novel conserved charges
for type IIB superstrings on AdS_5 x S^5.
