Morning Market Gainers

shares surged 24.75% to $15.68 after the company announced its fourth quarter results. Digital Ally reported Q4 adjusted earnings of $0.05 per share on revenue of $5.42 million.

shares climbed 15.85% to $4.24. Vericel reported a Q4 loss of $0.17 per share on revenue of $14.7 million.

shares gained 9.26% to $67.12 following the FDA approval for Impella 2.5 heart pump for elective and urgent high risk PCI procedures.

shares rose 7.92% to $1.67. Gynecologic cancers successfully treated using IsoRay's Cesium-131 will be presented at Society of Gynecologic Oncology Convention.

shares surged 6.85% to $3.4299. GenVec reported Q4 earnings of $0.11 per share on revenue of $3.5 million.

shares climbed 5.18% to $13.81. Logitech unveiled its most advanced wireless mouse.

shares jumped 4.68% to $14.77 following the announcement of Icahn stake. Carl Icahn lifted his stake in Chesapeake Energy to around 11%. Chesapeake Energy reduced its 2015 capital budget (including capitalized interest of $500 million) to $3.5 to $4.0 billion, versus its previous guidance of $4.0 to $4.5 billion.

shares gained 3.96% to $10.25.

and Linn Co, LLC announced a $1 billion equity commitment from Quantum Energy Partners.

shares jumped 2.92% to $75.34 after the company reported stronger-than-expected results for the fiscal first quarter on Tuesday.