Among the 1,000 biggest public companies in the United States, 45 CIOs were rewarded highly enough last year to be included in the proxy statements required by the Securities and Exchange Commission (SEC), which explain how the top five company executives are paid. \nCompensation for this elite 45 is a complex formula of fixed pieces, such as salary and perquisites, and variable pieces made up of cash, stock and options. To get them, executives have to achieve the financial goals the board specifies.\n\nThe motivation? Variable pay can account for 70 percent to 80 percent of a CIO's compensation.\n\nThe pay packages of CIOs and other executives can fluctuate 40 percent year-to-year, according to our analysis of the proxy statements. In other words, CIOs can do everything right, but larger economic forces or fundamental company problems can still mean they watch potential pay slip away.\n\nThe infographic below (you can download the PDF) identifies the 10 most highly paid CIOs among those listed in 2011 proxy statements for Fortune 1000 companies. The chart clearly shows how the performance-based portion of a CIO's pay package can be much bigger than the annual salary.\n\n\n\nDownload the "10 CIOs Crowned Compensation Champs" PDFKim Nash is a senior editor for CIO Magazine. Follow her on Twitter @knash99. Follow everything from CIO.com on Twitter @CIOonline, on Facebook, and on Google +.