[adventureful]

IBM under Lou Gerstner is one of the greatest turn around stories in business history.

"How Lou Gerstner Got IBM To Dance" http://www.forbes.com/2002/11/11/cx_ld_1112gerstner.html

Also, Michael Dell returning to his company has been a solid turn around in regards to profitability and improvement in product quality, both of which had languished under the former chief. It doesn't show in the stock valuation because of substantial PE compression, but Michael Dell has taken the company from losing money briefly and having some accounting scandals, to a solid level of profitability in the last few years.