Turnaround specialists

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Last week, Apple hired Burberry group chief executive Angela Ahrendts as head of retail operations. In about eight years at London-based Burberry, Ahrendts lured back high-end customers who turned away as its products became commonplace. She embraced technology by streaming fashion shows live on the web, allowing customers to order items online during the events. The company's shares gained about threefold during her tenure. Here's a look at chief executives who, since taking over, have helped their company stocks rise from laggards to outperformers: