Banco Santander S.A., Mellanox Technologies Ltd, Agrium Inc, Pizza Inn Inc, Newmont Mining Corp, Citigroup Inc, Caterpillar Inc and Groupon Inc are among the companies whose shares are moving in pre-market trading Tuesday.

Banco Santander S.A. (SAN) stock rose 2.30 percent to $6.66 in pre-market trading. The stock has a 52-week low of $4.88, a 52-week high of $9.59 and $61.42 billion in market capitalization.

Mellanox Technologies Ltd (MLNX) advanced 2.08 percent to $111.60 in pre-market trading. The company, which has a market capitalization of $4.55 million, has a 52-week low of $25.81 and a 52-week high of $113.90.

Agrium Inc (AGU) stock climbed 1.88 percent to $98 in pre-market trading. The stock has a 52-week low of $60.15, a 52-week high of $97.89 and $15.20 billion in market capitalization.

Pizza Inn Inc (PZZI) stock advanced 1.10 percent to $3.67 in pre-market trading. The company, which has a market capitalization of $29.12 million, has a 52-week low of $2.18 and a 52-week high of $7.07.

Newmont Mining Corp (NEM) stock climbed 1.09 percent to $47.43 in pre-market trading. The gold mining company said Monday that it was expecting to raise output to 3.5 million ounces by 2017 on spending around $5.28 billion on new and existing operations.

Citigroup Inc (C) stock advanced 1.08 percent to $29.09 in pre-market trading. The company, which has a market capitalization of $84.40 billion, has a 52-week low of $21.40 and a 52-week high of $38.40.

Caterpillar Inc (CAT) stock rose 1 percent to $89.50 in pre-market trading. The stock has a 52-week low of $67.54, a 52-week high of $116.95 and $57.89 billion in market capitalization.

Groupon Inc (GRPN) stock slumped 18.94 percent to $6.12 in pre-market trading. The company reported Monday the second quarter profit of $28.4 million or $0.04 per share, up from the net loss of $107.4 million or $0.35 loss per share in the same period last year.