BGC Partners Inc, Humana Inc, Vodafone Group Plc, 3D Systems Corporation, Tata Motors Limited, Nordic American Tanker Ltd, Fastenal Company, Hewlett-Packard Company, ArcelorMittal and Groupon Inc are among the companies whose shares are moving in the pre-market trading Tuesday.

Gainers

BGC Partners Inc. (NASDAQ:BGCP) shares surged 39.74 percent to $5.38 in pre-market trading. The company announced Monday that it has entered into an agreement pursuant to which it will sell its electronic trading platform to NASDAQ OMX Group Inc., in a cash-and-stock deal worth as much as $1.23 billion.

Humana Inc. (NYSE:HUM) shares climbed 11.64 percent to $83.75 in pre-market trading apparently on expectations of a positive ruling from the Centers for Medicare and Medicaid Services on Medicare Advantage reimbursement rates. The stock has a 52-week low of $59.92, a 52-week high of $93.36 and $11.88 billion in market capitalization.

Vodafone Group Plc (NASDAQ:VOD) stock gained 5.29 percent to $29.84 in pre-market trading. Vodafone shares advanced following a renewed speculation that Verizon Communications is sealing a deal to take over the companies' wireless partnership in the United States and will sell assets to AT&T.

3D Systems Corporation (NYSE:DDD) stock gained 4.10 percent to $34.50 in pre-market trading. The stock has a 52-week low of $14.83, a 52-week high of $47.99 and $3.05 billion in market capitalization.

Tata Motors Limited (NYSE:TTM) shares went up by 3.5 percent to $24.59 in pre-market trading. The company shares lost over 2 percent in regular trading Monday.

Losers

Nordic American Tanker Ltd (NYSE:NAT) shares tumbled 11.98 percent to $9.70 in pre-market trading. The company announced Monday that it is commencing a public offering of $87 million aggregate amount of common shares pursuant to the company's effective shelf registration statement.

Fastenal Company (NASDAQ:FAST) stock plummeted by 9.28 percent to $45.16 in pre-market trading. The company shares lost over 3 percent in regular trading Monday.

Hewlett-Packard Company (NYSE:HPQ) stock declined 3.35 percent to $22.53 in pre-market trading. The company stock has a 52-week low of $11.35, a 52-week high of $25.40 and $239.60 billion in market capitalization.

ArcelorMittal (NYSE:MT) dropped 2.58 percent to $12.45 in pre-market trading. The company stock has a 52-week low of $12.76, a 52-week high of $19.34 and $19.80 billion in market capitalization.

Groupon Inc. (NASDAQ:GRPN) stock lost 2.35 percent to $5.82 in pre-market trading. The stock has a 52-week low of $2.60, a 52-week high of $18.98 and $3.92 billion in market capitalization.

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