Dollar Tree Inc. is undergoing a leadership transition as CFO Kevin Wample departs, following pressure from activist investor Mantle Ridge to enhance its performance. Despite this shakeup, the retailer has achieved a remarkable 54.4% rise in share price over the past year and anticipates an earnings growth rate of 15.5% in the coming years. The company is also set to revamp its board with seven new directors, all while projecting solid growth in sales and earnings per share as it expands its store footprint.