Morning Market Movers

Heritage Financial Group

jumped 19.78% to $25.92. Renasant

and Heritage Financial Group announced a definitive merger agreement. Covenant Transportation Group

rose 11.20% to $27.20 after the company issued a strong Q4 earnings forecast. The Advisory Board Company

shares surged 9.85% to $41.48. Advisory Board announced its plans to acquire Royall & Company for $850 million. Analysts at Stifel Nicolaus upgraded Advisory Board Company from Hold to Buy. Restoration Hardware Holdings

shares gained 9.53% to $94.39 following earnings results that beat analyst expectations. Office Depot

shares rose 9.29% to $7.35 after Starboard Value boosted its stake in Office Depot to around 10% from a previous 8.6% stake, The Wall Street Journal reported. Staples

shares climbed 8.94% to $16.14 on confirmation of stake by Starboard Value. Lululemon Athletica

jumped 8.91% to $50.86 after the company reported better-than-expected quarterly earnings. However, the company issued a weak forecast. Urban Outfitters

climbed 7.46% to $32.25 after the company issued a strong same-store sales forecast for the current quarter. Walgreen Company

shares climbed 2.57% to $69.90 after the company's President And CEO Greg Wasson announced that he will retire following the completion of merger with Alliance Boots. Methode Electronics

rose 2.25% to $42.54 after the company reported better-than-expected earnings for the fiscal second quarter and raised its FY15 earnings forecast.