Among the companies with shares expected to actively trade in Tuesday's session are Express Inc. (EXPR), Gordmans Stores Inc. (GMAN) and QLogic Corp. (QLGC).

Express raised its fourth-quarter earnings and comparable sales guidance, citing stronger-than-expected performance in the holiday season. The young-adult retailer's shares climbed 15% to $16.20 premarket.

Gordmans lowered its earnings and revenue guidance for the fourth quarter after same-store sales declined 4.6% for the period on weakness in seasonal sales. Shares fell 13% to $12.20 premarket.

QLogic raised its guidance for fiscal third-quarter earnings and revenue, saying it brought in higher-than-expected revenue from host products and had particularly strong performance from network products. Shares rose 8.7% to $11.07 in premarket trading.

Camera pill company Given Imaging Ltd. (GIVN, GIVN.TV) said it is no longer seeking to be bought by or merged with a similar company, and that its major shareholder would seek to sell its stake in the company to another investor. Shares fell 13% to $15.88 premarket.

Forest Laboratories Inc. (FRX) swung to a fiscal third-quarter loss as the pharmaceutical company's sales continued to slump after its patent for Lexapro expired last year. The company also said it now expects adjusted earnings for the fiscal year to come in at the lower end of its guidance. Shares fell 5% to $35.70 premarket.

Golub Capital BDC Inc. (GBDC), which provides debt financing and makes equity investments in middle-market companies in the U.S., plans to offer 4.5 million shares. Golub had 28.6 million shares outstanding as of Nov. 29. Shares slipped 3% to $15.67 premarket.

Lululemon Athletica Inc. (LULU, LLL.T) raised its fiscal fourth-quarter guidance but the yoga-apparel maker's boosted per-share earnings forecast was merely in line with Wall Street projections and its more optimistic revenue outlook came up short of analysts' views. Shares were off 7.3% to $66.99 premarket.

RadioShack Corp. (RSH) said it ended its unprofitable mobile-phone partnership with Target Corp. (TGT), after failing to negotiate more beneficial terms with the discount retailer. Shares were up 4.3% to $2.41 premarket.

Solar Senior Capital Ltd. (SUNS) is offering two million shares and plans to use proceeds to pay down debt and for general corporate purposes. The business-development company had 9.5 million shares outstanding as of Oct. 31. Shares were off 4.4% at $18.49 premarket.

Santarus Inc. (SNTS) said the U.S. Food and Drug Administration has approved its treatment for a chronic inflammatory bowel disease as the specialty biopharmaceutical company also said it expects to meet or exceed its previous expectations for full-year earnings and revenue. Santarus also offered revenue guidance for 2013 above analysts' expectations. Shares rose 5.9% to $11.94 premarket.

 
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Agree Realty Corp. (ADC) is offering 1.3 million shares as the real estate investment trust looks to raise funds to pay down debt. The company had 11.4 million shares outstanding as of Oct. 31.

Alnylam Pharmaceuticals Inc. (ALNY) has launched an offering of up to $125 million of its stock. The company, which focuses on treatments for genetically defined diseases, recently had a market capitalization of $1.06 billion.

American Water Works Co. (AWK) said Chief Financial Officer Ellen Wolf plans to retire during the first half of the year, and the utility company has a launched a search for her successor.

Cable equipment provider Arris Group Inc. (ARRS) has agreed to sell around $150 million in shares to Comcast Corp. (CMCSA, CMCSK) as part of its deal to buy Motorola Mobility's set-top box business from Google Inc. (GOOG).

Brocade Communications Systems Inc. (BRCD) has named Lloyd Carney to be its chief executive, ending a search the networking products maker began in August.

Coldwater Creek Inc. (CWTR) said it expects its fourth-quarter loss to widen more than expected, after heavy promotions in the holiday season hurt the retailer's margins.

Fiserv Inc. (FISV) acquired Open Solutions Inc. for $55 million in a deal that will expand its financial-services technology offerings. The company also projected 2012 earnings near the lower end of its prior guidance and cut its revenue outlook.

Globecomm Systems Inc. (GCOM) has retained a financial adviser to explore potential strategic alternatives, as the provider of satellite-based communication services looks to increase shareholder value.

Drug developer InterMune Inc. (ITMN) said it is offering 12.5 million shares as well as $85 million aggregate principal amount of notes due in 2017. InterMune had 66 million shares outstanding as of Oct. 31.

ModusLink Global Solutions Inc. (MLNK) has named John J. Boucher as the new president and chief executive of the supply-chain management company, replacing Joseph C. Lawler who is retiring.

Multi-Fineline Electronix Inc. (MFLX) expects its gross margin for the fiscal first quarter to miss its earlier expectations as the circuit manufacturer scaled back production, though revenue exceeded the company's targets.

Owens & Minor Inc. (OMI) said its acting finance chief is stepping down, and will be replaced on an interim basis by the company's treasurer while the medical-products distributor continues its search for a permanent CFO.

Liberty Global (LBTYA, LBTYB), controlled by billionaire telecommunications pioneer John Malone, said it has increased its stake in Telenet Group Holding NV (TNET.BT, TLGHY) to about 58.4%, as Mr. Malone continues an effort to consolidate control of the Belgian cable-television operator.

Wireless infrastructure solutions provider Radisys Corp. (RSYS) said it expects to make a profit instead of a loss in its fourth quarter, while revenue is expected to be near the high end of guidance, thanks to strong sales in its software-solutions unit.

Canadian communications company Rogers Communications Inc. (RCI, RCI.B.T, RCI.A.T) has agreed to buy a wireless spectrum licensing option from cable and satellite company Shaw Communications Inc. (SJR, SJR.B.T, SJR.A.V) as well as its stake in Ontario-based cable operations, and to sell its interest in specialty TV network TVtropolis.

Footwear retailer Shoe Carnival Inc. (SCVL) lowered its fourth-quarter revenue estimates citing unusually warm weather early in the period, and narrowed its per-share earnings view.

Write to Anna Prior at anna.prior@dowjones.com

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