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We compute instanton corrections to non-minimal correlation functions ofchiral primary operators in the N=4 super Yang-Mills super-current multiplet.Using a representation in terms of Mellin integrals, we find that thesecorrections can be written as conformal integrals in AdS_5 times certain"kinematic" prefactors that are independent of the instanton moduli. We thenconsider the consecutive, pairwise light-like limit x_{i, i+1}^2 -> 0 of suchcorrelators, and prove that the ratio between the instanton contribution andthe corresponding tree-level expression vanishes in this limit. We alsospeculate on the extension to the non-perturbative level of the proposedduality with polygonal Wilson loops and briefly discuss its potentialimplications for scattering amplitudes.

Simplifying instanton corrections to N=4 SYM correlators