A Wall Street Journal analysis found the median salary for 132 CEOs in the S&P 500 was $12.4 million in 2018.A report from As You Sow, a nonprofit focused on shareholder advocacy, ranked the 25 CEOs on the S&P 500 who have earned a salary that's higher than expected, given shareholder return.As You Sow also calculated the ratio of CEO pay to median employee pay.Ronald F. Clarke, CEO of Fleetcor Technologies Inc., took the top spot: He made about $53 million a year in 2017, which means he was overpaid by 263%.Most CEOs make a lot of money. No surprise there.A Wall Street Journal analysis found the median salary for 132 CEOs in the S&P 500 was $12.4 million in 2018, up from $11.7 million in 2017.In fact, the typical CEO made a whopping 312 times their median employees' salary in 2017, according to the Economic Policy Institute.But some chief executives earn salaries that are seemingly disproportionate to their company's shareholder returns. A 2019 report from As You Sow, a nonprofit focused on shareholder advocacy, ranks the most "overpaid" leaders on the S&P 500.To figure out who's overpaid, As You Sow calculated the ratio of CEO pay in 2017 to total shareholder return at each company, as well as the companies where the most shares were voted against the CEO pay package (the first ratio was weighted double).Ronald F. Clarke, CEO of Fleetcor Technologies Inc., which makes corporate payment products, took the No. 1 spot. According to the analysis, Clarke is overpaid by 263%. His expected pay based on Fleetcor's performance is $14,483,985; his actual pay in 2017 was $52,643,810. Per the report, 86% of shareholders voted against Clarke's pay package.Because there was a change in CEO at a few companies (Oracle Corp., The Walt Disney Co., TransDigm Group, Inc., and Discovery, Inc.), the salary of the higher-paid CEO was counted.Below, we've listed the 25 most overpaid CEOs according to As You Sow, as well as each of their salaries, the median employee salary at their company, and the pay ratio.Read more: A new study found CEOs at America's biggest companies raked in $19 million on average last year, while workers' pay barely budged25. Randall Stephenson, AT&T, Inc.CEO pay: $28,720,720Median employee pay: $78,437Pay ratio: 366:124. Reed Hastings, Netflix, Inc.CEO pay: $24,377,499Median employee pay: $183,304Pay ratio: 133:123. Paal Kibsgaard, Schlumberger NVCEO pay: $20,759,340Median employee pay: $88,604Pay ratio: 234:122. Brenton Saunders, Allergan PlcCEO pay: $32,827,626Median employee pay: $94,064Pay ratio: 349:121. Brian Roberts, Comcast Corp.CEO pay: $32,520,224Median employee pay: $71,006Pay ratio: 458:120. Ari Bousbib, IQVIA Holdings, Inc.CEO pay: $38,029,517Median employee pay: $97,997Pay ratio: 388:119. Richard B. Handler, Jefferies Financial Group, Inc.CEO pay: $21,787,285Median employee pay: $44,584Pay ratio: 489:118. Leonard S. Schleifer, Regeneron Pharmaceuticals, Inc.CEO pay: $26,508,058Median employee pay: $123,418Pay ratio: 215:117. Mark D. Okerstrom, Expedia Group, Inc.CEO pay: $30,720,457Median employee pay: $71,696Pay ratio: 428:116. Jeffrey A. Miller, Halliburton Co.CEO pay: $23,078,364Median employee pay: $79,636Pay ratio: 290:115. Debra A. Cafaro, Ventas, Inc.CEO pay: $25,254,607Median employee pay: $88,630Pay ratio: 285:114. James Cracchiolo, Ameriprise Financial, Inc.CEO pay: $23,900,309Median employee pay: $107,082Pay ratio: 223:113. Gary A. Norcross, Fidelity National Information Services, Inc.CEO pay: $29,141,610Median employee pay: $44,556Pay ratio: 654:112. Stephen Kaufer, TripAdvisor, Inc.CEO pay: $47,933,462Median employee pay: $99,643Pay ratio: 481:111. David M. Zaslav, Discovery, Inc.CEO pay: $42,247,984Median employee pay: $80,858Pay ratio: 522:110. E. Hunter Harrison, CSX Corp.CEO pay: $151,147,286Median employee pay: $98,697Pay ratio: 1531:19. Margaret H. Georgiadis, Mattel, Inc.CEO pay: $31,275,289Median employee pay: $6,271Pay ratio: 4,987:18. Brian Duperreault, American International Group, Inc.CEO pay: $43,086,861Median employee pay: $64,186Pay ratio: 671:17. W. Nicholas Howley, TransDigm Group, Inc.CEO pay: $61,023,102Median employee pay: $46,742Pay ratio: 1,306:16. Robert Iger, The Walt Disney Co.CEO pay: $36,283,680Median employee pay: $46,127Pay ratio: 787:15. Stephen Wynn, Wynn Resorts Ltd.CEO pay: $34,522,695Median employee pay: $44,437Pay ratio: 777:14. Dirk Van de Put, Mondelez International, Inc.CEO pay: $42,442,924Median employee pay: $42,893Pay ratio: 990:13. Hock Tan, Broadcom, Inc.CEO pay: $103,211,163Median employee pay: NAPay ratio: NA2. Mark V. Hurd/Safra Catz, Oracle Corp.CEO pay: $81,562,244Median employee pay: $89,887Pay ratio: 907:11. Ronald F. Clarke, Fleetcor Technologies IncCEO pay: $52,643,810Median employee pay: $34,700Pay ratio: 1,517:1SEE ALSO:Regular workers now have to work for 167 years to make as much as CEOs do in oneJoin the conversation about this storyNOW WATCH: What El Chapo is really like, according to the wife of one his closest henchman Click here to read full news..