Among the companies expected to trade actively in Tuesday's session are Yum Brands Inc. (YUM), Cypress Semiconductor Corp. (CY) and Fusion-io Inc. (FIO).

Yum said it expects its same-store sales in China to fall more than previously expected in the fourth quarter, citing poor publicity from a government review of China poultry supplies that badly impacted KFC operations last month. Shares fell 4.1% premarket to $65.11.

Cypress cut its fourth quarter revenue and profit forecast, saying the "anemic" macro climate in the semiconductor industry hurt business more than it had expected. Shares fell 6.3% to $10.35 premarket.

Data-storage stocks are flashing warning signs after William Blair downgraded industry stalwart EMC Corp. (EMC) and its younger cousin, Fusion-io, to market perform. The firm is basing the neutral ratings on overly "aggressive" 2013 Street estimates, warning EMC could suffer "choppy" near-term results as companies move data to cloud systems and show renewed enthusiasm for server-storage bundles, sapping demand with more efficient data center architecture. EMC fell 1.4% to $23.80 in premarket trade while Fusion-io shed 4.5% to $20.25.

Calumet Specialty Products Partners LP (CLMT) is offering 5 million shares as it seeks to raise funds to repay debt. The maker of oil and fuel products recently had 57.6 million shares outstanding. Shares fell 5.6% premarket to $31.42.

Investment firm Solar Capital Ltd. (SLRC) will sell 6 million shares to pay down borrowings and to make new investments. Solar Capital recently had around 38.7 million shares outstanding. Shares fell 3% premarket to $24.15.

 
 
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ConAgra Foods Inc. (CAG) is offering to sell around $240 million of its shares, in order to help fund its proposed $6.8 billion acquisition of Ralcorp Holdings Inc. (RAH). The food company recently had a market capitalization of roughly $12.2 billion.

Dynegy Inc.'s (DYN) chief operating officer Kevin Howell has stepped down, and the power company said it expects to name his successor in the first quarter. Mr. Howell will remain at the company in an advisory role and to support the transition, and will continue reporting to Chief Executive Robert Flexon.

Lockheed Martin Corp. (LMT) has agreed to acquire certain assets of the engine-maintenance, repair and overhaul business of insolvent Canadian aircraft maintenance company Aveos Fleet Performance Inc. as the U.S. defense contractor seeks to expand in Canada. Terms of the deal weren't disclosed.

Newcastle Investment Corp.'s (NCT) larger-than-expected offering of 50 million shares priced at a 2.6% discount to its Monday close. The company intends to use the proceeds for general corporate needs and to make several investments.

Weight-loss program provider Medifast Inc. (MED) has named Timothy G. Robinson as its new chief financial officer, filling a role that has been in flux in recent months.

Manufacturing services company Plexus Corp. (PLXS) said it expects fiscal first-quarter earnings and revenue to fall short of its previous guidance, due to weak demand in its networking and communications business.

Summit Hotel Properties Inc. (INN) has launched an offering of 13 million shares, intending to put the proceeds in part toward planned acquisitions of Hyatt Hotels Corp. (H) properties, and to pay down debt. The real-estate investment trust recently had 11.9 million shares outstanding.

Team Inc.'s (TISI) fiscal second-quarter profit rose 35% as the industrial-services company saw continued revenue growth, particularly in its inspection and assessment business.

Tesoro Logistics LP (TLLP) is offering 8.5 million units representing limited partner interests. The company plans to use the proceeds to help fund its proposed acquisition of Chevron Corp.'s (CVX) northwest products system, including a 760-mile pipeline. Tesoro recently had 35.5 million units outstanding.

Williams Partners L.P. (WPZ) is seeking regulatory approval to build an additional natural gas delivery point from its Transco pipeline to Brooklyn and Queens, New York.

Wet Seal Inc. (WTSLA) named John D. Goodman as its new chief executive, filling a post that had been empty for several months with someone who has led and sold another teen retailer.

Yingli Green Energy Holding Co. (YGE) said it expects photovoltaic module shipments for 2012 to be slightly ahead of its latest guidance, as the Chinese solar-products maker saw strong results in its fourth quarter.

Write to Mia Lamar at mia.lamar@dowjones.com

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