Pluristem Therapeutics, Nokia Corp, Amarin Corp, Sprint Nextel, KB Home, Yelp Inc, Glu Mobile and Zynga Inc are among the companies whose shares are moving in the pre-market trading Thursday.

Pluristem Therapeutics Inc. (PSTI) stock climbed 5.34 percent in the pre-market trading. The company stock rallied more than 15 percent this week after announcing that the life of a patient suffering from bone marrow failure, in which there was a dangerous reduction in the number of red blood cells, white blood cells and platelets (pancytopenia), has been saved using Pluristem's PLX Cells.

Nokia Corp. (NOK) stock surged 5.24 percent to $2.81 in the pre-market trading. Digia Oyj announced Thursday that it has signed an agreement to acquire Qt software technologies and Qt business from Nokia. Following the acquisition, Digia becomes responsible for all the Qt activities formerly carried out by Nokia.

Amarin Corp Plc (AMRN) stock gained 3.17 percent to $11.70 in the pre-market trading. The company announced a second quarter net profit of $0.38 per share compared to $1.58 per share in the same period last year.

Sprint Nextel Corp. (S) stock surged 3.04 percent to $4.75 in the pre-market trading. The stock has a 52-week low of $2.10, a 52-week high of $4.63 and $13.83 billion in market capitalization.

KB Home (KBH) stock advanced 1.39 percent to $10.24 in the pre-market trading. The stock has a 52-week low of $5.02, a 52-week high of $13.12 and $778.88 million in market capitalization.

Yelp Inc (YELP) stock plunged 3.40 percent to $25.56 in the pre-market trading. The stock has a 52-week low of $14.10, a 52-week high of $31.96 and $1.62 billion in market capitalization.

Glu Mobile Inc (GLUU) stock plunged 3.05 percent to $4.45 in the pre-market trading. The company stock plunged more than 5 percent in regular trading Wednesday.

Zynga Inc (ZNGA) stock fell 1.97 percent to $2.89 in the pre-market trading. John Schappert, Chief Operating Officer of Zynga, will resign and leave the board after he was stripped of some responsibilities at the company. Schappert had lost his role overseeing game development in a reorganization that was aimed at reviving growth and making more money from mobile services, Bloomberg reported citing people with knowledge of the matter.