SAN JOSE — With 17 competing groups vying to be appointed lead counsel in data-breach litigation against Anthem Inc., U.S. District Judge Lucy Koh said Thursday that she was “disappointed” with the application from the two lawyers she temporarily appointed to lead the case.

Although Koh expressed a desire to keep the plaintiffs team lean, the temporary co-leads, Eve Cervantez of Altshuler Berzon and Andrew Friedman of Cohen Milstein, proposed to run the case using a six-firm steering committee.