If one digs deeper, one sees that of the 25 university heads, 11 (44%) are Jewish (2% of the US). Meaning of the 25, only 12 (48%) are non-Jewish white (58% of the US) (NYT counted 13, but Jahanian is Iranian, which surely qualifies as a minority).

For the supreme court, 3 (33%) are Jewish, and 4 (44%) non-Jewish white.

Of the major news organization heads, 4 (27%) are Jewish, and 53% non-Jewish white.

Of the top TV and Hollywood heads, 7 (28%) are Jewish, and 60% non-Jewish white.

So it turns out, looking at only non-Jewish whites, they're more often than not under-represented.