China Unicom, Ancestry.com, Logitech International, Zynga, Newmont Mining, Infosys, Hewlett-Packard Co and Whitestone REIT are among the companies whose shares are moving in the pre-market trading Thursday.

China Unicom Ltd. (CHU) stock climbed 6.54 percent to $17.10 in pre-market trading. The company reported the second quarter net income of 2.42 billion yuan, down from 2.62 billion yuan in the same period last year but topped Reuters' estimate of 3.3 billion yuan.

Ancestry.com Inc. (ACOM) stock climbed 6.42 percent to $32.16 in pre-market trading. The company had asked potential buyers, including Permira Advisers LLP and TPG Capital LP, to increase their competing bids for a possible buyout, Bloomberg reported citing people familiar with the situation.

Logitech International SA (LOGI) stock surged 5.98 percent to $9.22 in pre-market trading. The stock has a 52-week low of $7.10, a 52-week high of $12.09 and $1.36 billion in market capitalization.

Zynga Inc. (ZNGA) stock surged 3.07 percent to $3.36 in pre-market trading. The company stock climbed nearly 10 percent in regular trading Wednesday after analysts' at JMP Securities initiated coverage on shares of ZNGA with "market outperform" rating.

Newmont Mining Corp. (NEM) stock gained 1.42 percent to $50.00 in pre-market trading. The stock has a 52-week low of $42.95, a 52-week high of $72.42 and $24.46 billion in market capitalization.

Infosys Ltd. (INFY) stock gained 2.25 percent to $44.48 in pre-market trading. The stock has a 52-week low of $37.93, a 52-week high of $61.48 and $24.86 billion in market capitalization.

Hewlett-Packard Co. (HPQ) stock plunged 5.42 percent to $18.16 in pre-market trading. The company swung to the third quarter net loss of $8.9 billion or $4.49 per share compared to a net profit of $1.9 billion or $0.93 per share in the same period last year. The company also expects the fiscal 2012 adjusted net profit to be in a range of $4.05 to $4.07 per share compared to prior estimate of $4.05 to $4.10 per share and against Reuters' estimate of $4.07 per share.

Whitestone REIT (WSR) stock plunged 3.67 percent to $12.85 in pre-market trading. The company announced Wednesday that it intended to sell 4,000,000 of its common shares in an underwritten public offering.