There were six different opinions in this case.  Here’s the breakdown:

"KENNEDY, J., announced the judgment of the Court and delivered the opinion of the Court with respect to Parts II–A and III, in which STEVENS, SOUTER, GINSBURG, AND BREYER, JJ., joined, an opinion with respect to Parts I and IV, in which ROBERTS, C. J., and ALITO, J., joined, an opinion with respect to Parts II–B and II–C, and an opinion withrespect to Part II–D, in which SOUTER and GINSBURG, JJ., joined. STEVENS, J., filed an opinion concurring in part and dissenting in part, in which BREYER, J., joined as to Parts I and II. SOUTER, J., filed an opinion concurring in part and dissenting in part, in which GINSBURG, J., joined. BREYER, J., filed an opinion concurring in part and dissenting in part. ROBERTS, C. J., filed an opinion concurring in part, concurring in the judgment in part, and dissenting in part, in which ALITO, J., joined. SCALIA, J., filed an opinion concurring in the judgment in part and dissenting in part, in which THOMAS, J., joined, and in which ROBERTS, C. J., and ALITO, J., joined as to Part III."

Yeah,  I don’t know who won either, or what the Court actually, you know, decided.

Lyle Denniston wades into the deep grass, fortunately.

Apparently, it was mostly a victory for those who want to preserve their political power by gerrymandering congressional district lines.  Maybe.