The AP's and Equilar's compensation study included pay data for 340 CEOs at S&P 500 companies who have served at least two fiscal years at their companies, which filed proxy statements between Jan. 1 and April 30. Some high-profile CEOs are not included because they don't fit the criteria, such as Amazon's Andy Jassy and Twitter's Parag Agrawal. The survey does not count changes in the value of CEOs' pension benefits and some other items in its totals for compensation. Business Money Business News