The top pre-market NASDAQ stock market gainers are: Merge Healthcare, Sequenom, LM Ericsson Telephone, Unilife and Amarin. The top pre-market NASDAQ stock market losers are: ZAGG, Zions Bancorp, Sina, Green Mountain Coffee Roasters and Research In Motion.

Gainers

Merge Healthcare Inc. (MRGE) stock grew 8.37 percent to $5.05 in pre-market trading.

Sequenom Inc. (SQNM) stock grew 8.31 percent to $4.04 in pre-market trading. The company said numerous leading healthcare providers across the United States, including Women & Infants Hospital of Rhode Island, Vanderbilt University Medical Center and Florida Hospital in Orlando have begun ordering the Sequenom Center for Molecular Medicine's (Sequenom CMM) MaterniT21 laboratory-developed test (LDT) for their patients. The MaterniT21 LDT provides direct assessment of fetal chromosomal status by examining circulating cell-free DNA in a maternal blood sample.

LM Ericsson Telephone Co. (ERIC) stock increased 2.24 percent to $9.58 in pre-market trading.

Unilife Corp. (UNIS) stock gained 1.64 percent to $3.10 in pre-market trading.

Amarin Corp. plc (AMRN) stock rose 1.57 percent to $6.45 in pre-market trading.

Losers

ZAGG Inc. (ZAGG) stock slid 5.24 percent to $8.86 in pre-market trading.

Zions Bancorp (ZIONW) stock declined 3.64 percent to $2.65 in pre-market trading.

Sina Corp. (SINA) stock moved down 0.51 percent to $54.77 in pre-market trading.

Green Mountain Coffee Roasters Inc. (GMCR) stock moved down 0.46 percent to $45.05 in pre-market trading.

Research In Motion Ltd. (RIMM) stock moved down 0.15 percent to $13.42 in pre-market trading.