The companies whose shares are moving in pre-market trade on Tuesday are: Texas Instruments, Nvidia, Monsanto, Urban Outfitters, Broadcom, Corning, Freeport-McMoRan and Cephalon.

Texas Instruments Inc. (NYSE:TXN) shares gained 3 percent to $35.05 in pre-market trading session. The company agreed to buy National Semiconductor Corp. for $6.5 billion, or $25 per share, a deal that combines two industry leaders in analog semiconductors, each with unique strengths in delivering products to improve performance and efficiency and convert real-world signals in electronic systems.

Urban Outfitters Inc. (NASDAQ:URBN) shares advanced 2.25 percent to $31.37 in pre-market trading session. The company stock was upgraded to “overweight” rating at Piper Jaffray.

Nvidia Corp. (NASDAQ:NVDA) shares advanced 2.16 percent to $17.96 in pre-market trading session.

Monsanto Co. (NYSE:MON) shares gained 2.02 percent to $74.80in pre-market trading session. The company reported second quarter net income of $1.02 billion or $1.88 per share compared to $887 million or $1.60 per share last year.

Broadcom Corp. (NASDAQ:BRCM) shares advanced 1.77 percent to $39.13 in pre-market trading session. The company stock was upgraded to “outperform” rating at Oppenheimer.

Corning Inc. (NYSE:GLW) shares advanced 1.72 percent to $20.75 in pre-market trading session.

Freeport-McMoRan Copper & Gold Inc. (NYSE:FCX) shares gained 1.68 percent to $57.55 in pre-market trading session as gold futures touched a new high and silver prices rose to a 31-year high.

Cephalon Inc. (NASDAQ:CEPH) shares declined 1.12 percent to $76.50 in pre-market trading session after the company said its board unanimously rejected an unsolicited, $5.7 billion offer from Valeant Pharmaceuticals International Inc.