Ziopharm Oncology Inc. (NASDAQ:ZIOP) is down 6.02% in after hours trading at $5.00. ZIOP closed the day up 2.90% at $5.32 with 547 thousand shares traded. ZIOP shares fell in after hours following announcement of proposed public offering of common stock. The company has a market cap of 362.57 million.

Capital One Financial Corporation (NYSE:COF) is down 4.16% in after hours trading at $46.74. COF traded 6.7 million shares a day today, more than a million shares more than its daily average. COF shares are falling after its fourth quarter net income dropped sharply. Net income fell 41% in the fourth quarter as marketing and operating expenses rose. The company earned $407 million or $0.88 per share. Analysts were expecting $1.55 per share. The company has a market cap of 22.24 billion.

Boardwalk Pipeline Partners (NYSE:BWP) is down 3.93% in after hours trading at $27.39. BWP traded 324 thousand shares today, slightly below its daily average. BWP shares are falling after the company announced public offering of 8 million units. The company has a market cap of 5.66 billion.

American Express Company (NYSE:AXP) is down 2.26% in after hours trading at $49.80. AXP released their earnings after market close today. American Express profits rose and had a fourth quarter EPS of $1.01, beating estimates of $0.98. Revenue was up 7% and expenses rose 1%. The company has a market cap of 59.18 billion.

E-Commerce China Dangdang Inc. (NYSE:DANG) is down 1.8% in after hours trading at $7.11. DANG traded 5.5 million shares today, more than double its daily average. DANG has jumped more about $2 a share since the new year. The company has a market cap of 573.91 million.