That depends on how you wish to frame that statistic. Do you go with 3 from 35, 2 from 10 or 2 from 3? Urban Sea being the dam of Galileo and Sea The Stars contributed a significant part to that pedigree stat. There will be no direct Galileo three year olds next year so you can already draw up a list of his older horses in training or his grandsons/daughters will obviously have Urban Sea in their pedigree (e.g. sired by Frankel). I am guessing that in this respect you are only interested in dams and recent generations.
Ombudsman is a 10F horse, no way would he have been competitive in that Arc run at that pace on that ground. They know he won't get 12F in a taxi so they have taken the shorter option of the Champion Stakes.