Pre-Market Movers (Ancestry.com, JPMorgan, Shuffle Master, Facebook, Logitech, Diageo, Mitcham Industries)

Among the companies whose shares are moving in pre-market trading Wednesday are: Ancestry.com, Telefonica, JPMorgan Chase, Shuffle Master, Logitech International, Diageo, Facebook and Mitcham Industries.

Ancestry.com Inc. (ACOM) stock climbed 24.17 percent to $28.10 in pre-market trading on news that the company is working with Frank Quattrone's Qatalyst Partners to find buyers.

Telefonica SA (TEF) stock surged 4.94 percent to $12.11 in pre-market trading. The company is considering an initial public offering of a 20 percent stake in the O2 Germany unit, Bloomberg reported, citing people familiar with the matter.

JPMorgan Chase & Co (JPM) stock surged 3.78 percent to $33.20 in pre-market trading. Bank regulators in the U.S. will review whether JPM executives should give back some of their compensation due to the bank's failed hedging strategy that produced at least $2 billion in losses, Reuters reported.

Shuffle Master Inc (SHFL) stock gained 3.31 percent to $12.79 in pre-market trading. The company stock slumped more than 13 percent in regular trading Tuesday.

Logitech International SA (LOGI) stock advanced 2.56 percent to $10.00 in pre-market trading. The stock has a 52-week low of $7.10, a 52-week high of $12.91 and $1.60 billion in market capitalization.

Diageo plc (DEO) stock rose 2.12 percent to $95.90 in pre-market trading on news that the company plans to invest more than $1.54 billion over the next five years to expand production of its Scotch whisky.

Facebook Inc. (FB) stock rose 1.67 percent to $26.30 in pre-market trading. The company stock closed at a new low of $25.87 on Tuesday which represents a decline of 3.8 percent from the previous day’s close. FB stock has slumped nearly 33 percent from its IPO debut when it was priced at $38 on May 18.

Mitcham Industries, Inc. (MIND) stock slumped 12.62 percent to $16.00 in pre-market trading. The company's first quarter net profit rose to $8.5 million or $0.63 per share from $6.1 million or $0.58 per share in the same period a year earlier, but it fell short of analysts’ estimation of $0.83 per share.