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Given a fixed knot P in a solid torus and any knot K in S^3, one can form thesatellite of K with pattern P. This operation induces a self-map of theconcordance group of knots in S^3. It has been proved by Dai, Hedden, Mallick,and Stoffregen that in the smooth category there exist P for which thisfunction is rank-expanding; that is, for some K, the set {P(nK)} generates aninfinite rank subgroup. Here we demonstrate that similar examples exist in thecase of the topological locally flat concordance group. Such examples cannotexist in the algebraic concordance group.

Rank-expanding satellite operators on the topological knot concordance group