“I believe the poster was referring to the 2015 Forbes ranking that was tucked inside the article toward the bottom.”
I think the OP was referring to companies that have a significant percentage of employees from top-10 schools and there being 4 LACs in the top-10. Google e.g. has 30% of top-10, but that’s pretty much because of Stanford and MIT, not the other schools on the list. The bigger blocks on the chart are orange (Berkeley, Cal Tech) and green (Michigan, UCLA), and silicon valley companies with many employees from schools ranked below 100 is because of Purdue, UCs and San Jose State.