Lay, 64, died on Wednesday, while holidaying near Aspen, Colorado, six weeks after being found guilty of fraud and conspiracy.
US authorities are probing if Linda, wife of ex-Enron chairman Ken Lay, acted improperly when she had their family foundation sell 1.3 million Enron stocks just days before the energy giant's bankruptcy.
The surprise was Conde Nast Portfolio's topper for the world's best-ever CEO. It was Henry Ford, founder of Ford Motors. There is no doubt that Ford was a great entrepreneur and business visionary. But, with the hindsight of almost a century, it is worth questioning whether he was a good CEO. Ford could easily have won the accolade in his lifetime for revolutionising the personal transportation industry with the Model T.