(NASDAQ:

) shares jumped 18.12% to $5.54. Bon Ton reported Q4 earnings of $3.55 per share on revenue of $942.6 million. It also expects FY loss of $0.25 per share to gain of $0.25 per share, versus analysts' estimates for a loss of $0.36 per share.

(NYSE:

) surged 17.99% to $13.12 after the company reported better-than-expected Q4 results.

(NASDAQ:

) shares gained 14.95% to $9.27. SciClone Pharmaceuticals reported Q4 earnings of $3.5 million.

(NASDAQ:

) shares climbed 15.71% to $8.91 after the company reported that it is postponing its earlier announced public offering of 4.4 million shares.

(NASDAQ:

) shares jumped 15.34% to $2.24 after rising 4.30% on Wednesday. HC Wainwright upgraded Amarin to Buy and raised the price target from $2.50 to $10.00.

(NASDAQ:

) jumped 15.03% to $1.7599 after the company reported Q4 results.

(NASDAQ:

) gained 11.06% to $11.25. Numerex reported Q4 earnings of $0.03 per share on revenue of $24.9 million.

(NYSE:

) shares surged 11.24% to $53.44 after the company reported a narrower-than-expected loss in its fiscal fourth quarter.

(NYSE:

) shares rose 5.50% to $34.53. Lumber Liquidators provided first quarter guidance but omitted a full year outlook, noting it is "unable to currently forecast full year 2015 net sales or profitability." The company said that it expects first quarter sales to be $253.6 million to $265.6 million, short of the $276 million analysts were expecting.

(NASDAQ:

) shares gained 5.22% to $9.48. JA Solar reported Q4 adjusted net income of $0.28 per share on sales of $576.4 million.

(NYSE:

) shares rose 3.58% to $36.20. Morgan Stanley announced a $3.1 billion buyback plan and raised quarterly dividend from $0.10 per share to $0.15 per share.

(NYSE:

) shares jumped 3.01% to $53.90. Citi lifted its quarterly dividend from $0.01 per share to $0.05 per share and announced a $7.8 billion buyback plan.