Companies are having to make additional disclosures to account for increases in the pay of their chief executives that come from pension contributions and market performance.

That’s among the findings from the Conference Board, which collaborated with Arthur J. Gallagher & Co. on the report “CEO and Executive Compensation Practices: 2015 Edition,” which looked at trends and developments in senior management compensation at companies that issue equity securities registered with the U.S. Securities and Exchange Commission (SEC) and were included in the Russell 3000 index as of May 2015.

According to the research, the median total compensation of CEOs of U.S. public companies in the Russell 3000 index gained a heady 11.9 percent in 2014 over the previous year and as much as 34.7 percent over 2010. Equity awards, excluding stock options, represent 34.7 percent of the total value of the CEO pay package, and the median grant-date value of stock awards grew about 25 percent in 2014.