The average compensation package for CEOs in the U.S. rose nearly 13 percent over the past year, driven by increasingly valuable pension plans, according to new research that that analyzed early filers in the Russell 3000 index.

The average compensation package for CEOs in the U.S. rose nearly 13 percent over the past year, driven by increasingly valuable pension plans, according to new research that that analyzed early filers in the Russell 3000 index.