-Kenneth Lay, founder of Enron Corp., convicted of fraud, conspiracy and lying to banks in May 2006. Conviction vacated later that year after his death.
-Jeffrey Skilling, Enron's former chief executive, sentenced in October 2006 to more than 24 years in prison for his role in company's collapse.
-Andrew Fastow, Enron's former CFO, pleaded guilty to conspiracy in 2004 and sentenced to six years for his role in scandal.
-Joseph Nacchio, former Qwest CEO, sentenced to six years after being convicted in 2007 of 19 counts of insider trading.
-John Rigas, founder of cable television company Adelphia Communications, convicted in 2004 of charges including securities and bank fraud. Currently serving 12 years in prison. Indicted in 2008 on additional charges of tax evasion.
-Timothy J. Rigas, Adelphia's former CFO, convicted on same charges as father and serving 17 years. Also indicted on tax evasion charges in 2008.
-Bernard Ebbers, former chief of WorldCom, imprisoned in September 2006 on 25-year sentence for role in $11 billion accounting fraud that toppled his telecommunications company.
-Dennis Kozlowski, CEO of Tyco International, convicted in June 2005 and serving 8 1/3 to 25 years on charges including conspiracy, grand larceny and securities fraud.
-Mark Swartz, Tyco's finance chief, received same sentence as former boss and has been imprisoned since 2005.
-A. Alfred Taubman, former chairman of mall developer Taubman Centers Inc. and Sotheby's auction house, released in June 2003 after serving a year in prison for fixing art prices.
-Ivan Boesky, stock speculator who pleaded guilty to insider trading, released in 1990 after serving two years in prison.
-Michael Milken, junk bond king who pleaded guilty to securities violations in 1989, served 22 months in prison, paid a $200 million fine.
-Leona Helmsley, New York hotel empress convicted of tax evasion. Served 18 months in prison beginning in 1992.
-Steve Madden, founder of shoe company bearing his name, currently serving a 41-month sentence for stock fraud and money laundering.
Associated Press researcher Judy Ausuebel contributed to this report.
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