The top aftermarket NYSE losers Tuesday were: Endeavor International, Parker Drilling, Ventas, Office Depot, iSoftStone Holdings, Demand Media, Noranda Aluminum Holding and Xueda Education Group.

Endeavor International Corp. (NYSE:END) shares slumped 8.75 percent to $8.66 in post-market trading sessions. The company stock climbed more than 9 percent in regular trading sessions.

Parker Drilling Co. (NYSE:PKD) shares fell 3.37 percent to $7.17 in post-market trading sessions. The stock has a 52-week low of $3.60, a 52-week high of $7.55 and $868.49 million in market capitalization.

Ventas, Inc. (NYSE:VTR) shares fell 3.24 percent to $53.79 in aftermarket trading sessions. The company announced on Tuesday that private investment funds managed by Lazard Real Estate Partners LLC and its affiliates have agreed to sell 21,070,658 shares of the company's common stock to Citigroup, as underwriter, in an underwritten public offering of those shares.

Office Depot, Inc. (NYSE:ODP) shares declined 3.17 percent to $2.14 in post-market trading sessions. The company stock surged nearly 3 percent in regular trading sessions.

iSoftStone Holdings Ltd. (NYSE:ISS) shares declined 3.12 percent to $9.26 in aftermarket trading sessions. The company stock climbed more than 9 percent in regular trading sessions.

Demand Media Inc. (NYSE:DMD) shares declined 2.99 percent to $7.18 in aftermarket trading sessions. The stock has a 52-week low of $5.24, a 52-week high of $27.38 and $620.44 million in market capitalization.

Noranda Aluminum Holding Corp. (NYSE:NOR) shares declined 2.8 percent to $8.95 in aftermarket trading sessions. The company stock climbed more than 11 percent in regular trading sessions.

Xueda Education Group (NYSE:XUE) shares declined 2.67 percent to $3.46 in aftermarket trading sessions.

Nyse Citigroup Investment Citigroup