American International Group, DryShips, Merck & Co, Complete Genomics, SAP AG, Deutsche Bank and Cognizant Technology Solutions Corp. are among the companies whose shares are moving in pre-market trading Thursday.

American International Group (AIG) stock gained 2.59 percent to $31.63 in pre-market trading. The board of directors of AIG Wednesday elected Morris W. Offit as a director until the 2013 Annual Meeting of Shareholders. Offit previously served as an AIG Director from 2005 until his retirement from the company board at the 2012 Annual Meeting of Shareholders in accordance with the retirement guideline for AIG Directors.

DryShips Inc. (DRYS) stock gained 2.24 percent to $2.28 in pre-market trading. The stock has a 52-week low of $1.75, a 52-week high of $4.10 and $944.99 million in market capitalization.

Merck & Co Inc. (MRK) stock advanced 2.18 percent to $42.11 in pre-market trading. The company plans to close an advanced clinical study of its osteoporosis drug after an interim analysis showed that the trial met its primary efficacy goals, and that its benefits outweighed the risks, the Wall Street Journal reported.

Complete Genomics, Inc. (GNOM) stock slumped 13.65 percent to $2.53 in pre-market trading. The company stock climbed nearly 44 percent Wednesday after announced that its Long Fragment Read (LFR) technology for whole genome sequencing dramatically improved accuracy, enabled fully-phased genomes and significantly reduced the amount of DNA required for testing. Its LFR technology should accelerate the use of the whole genome sequencing by physicians to diagnose and treat their patients.

SAP AG (SAP) stock declined 2.94 percent to $55.06 in pre-market trading. Analysts at ThinkEquity upgraded shares of SAP to buy rating from hold rating Wednesday.

Deutsche Bank AG (DB) stock declined 1.84 percent to $32.09 in pre-market trading. The stock has a 52-week low of $28.57, a 52-week high of $56.85 and $30.15 billion in market capitalization.

Cognizant Technology Solutions Corp. (CTSH) stock fell 1.03 percent to $55.94 in pre-market trading. Cognizant announced Wednesday that Michael Patsalos-Fox has been elected to its Board of Directors. The stock has a 52-week low of $53.54, a 52-week high of $78.00 and $17.21 billion in market capitalization.