Among the companies with shares expected to actively trade in Thursday's session are Molina Healthcare Inc. (MOH), Lululemon Athletica Inc. (LULU) and Navistar International Corp. (NAV). Medicaid insurer Molina Healthcare has suspended its full-year earnings guidance while it sorts out problems in new Texas markets, where costs are topping revenue. Shares tumbled 25% to $19.40 in premarket trading. Lululemon Athletica Inc. (LULU) again topped Wall Street forecasts in its fiscal first quarter, yet shares of the yoga products company tumbled in New York on its weaker-than-expected outlook for the current quarter. Shares were last down 12% to $61.80 premarket. Navistar International Corp. (NAV) swung to a surprise fiscal second-quarter loss, due in part to restructuring charges and slower-than-expected revenue growth. The commercial truck maker also said it was shuffling its management structure in an effort to streamline decision making. Shares tumbled 15% to $24 premarket. Men's Wearhouse Inc.'s (MW) fiscal first-quarter earnings fell 2% as higher overhead costs hit results. Shares fell 18% to $29.09 premarket as per-share earnings and revenue growth missed targets and the retailer gave a downbeat view for the current quarter. Digital Generation Inc. (DGIT) spurned a takeover offer valuing it at $20 a share, well above its current stock price, according to a report from Reuters that cited a source familiar with the matter. The digital advertising company has reportedly drawn the interest of several potential suitors, including competing companies and private-equity firms. Shares surged 7.2% to $13 in premarket trading. Davenport lifted its rating on RF Micro Devices Inc. (RFMD) to buy from neutral, saying strong demand for the chipmaker's products leave it with the potential to meet or exceed Wall Street expectations in the months ahead. Noting RF Micro is a top supplier to smartphone manufacturers, the firm expects it to remain the lead supplier this year for Samsung Electronics Co., the world's largest maker of mobile phones. Shares jumped 3.9% to $4.30 in premarket trading. A drug from XenoPort Inc. (XNPT) was approved by the U.S. Food and Drug Administration to treat a shingles-related disease. The news failed to give the stock a boost, however, as the approval was expected by the market and the stock is up nearly 35% in the past month. Another potential overhang on the shares is an ongoing marketing dispute between XenoPort and its partner on the drug, GlaxoSmithKline PLC (GSK). XenoPort developed the drug and partnered with Glaxo in 2007 to take it to market, but in January it accused the company of breaching their contract. Shares were last down 2.8% to $5.90 in premarket trading. Arbor Realty Trust Inc. (ABR) commenced a public offering of 3.5 million shares as the real-estate investment trust looks to use the proceeds to make investments and pay down debt. Shares slumped 6% to $5.37 in premarket trading. Pall Corp.'s (PLL) fiscal third-quarter earnings rose 11% as the maker of filtration and purification products recorded a smaller tax provision, though its core earnings fell amid higher expenses and relatively flat revenue. Shares slipped 5% to $51.95 premarket. Watchlist: ABM Industries Inc.'s (ABM) fiscal second-quarter earnings slid 17% on higher expenses and softer revenue, though its core income rose. The company said longer-than-anticipated start dates on recently awarded contracts coupled with lower-than-expected contributions from government business to weaken revenue. Annie's Inc.'s (BNNY) fiscal fourth-quarter income sank 63% as the organic-foods provider saw its first quarter as a public company bogged down by higher tax costs and initial public offering expenses, though core earnings were up. Standard & Poor's raised its long-term issuer ratings for American Express Co.'s (AXP) core operating subsidiaries by one notch, citing the credit-card lender's strong performance during the credit crisis. Analogic Corp.'s (ALOG) fiscal third-quarter earnings jumped 70% as ultrasound and security-technology sales improved and operating expenses fell. C&J Energy Services Inc. (CJES) agreed to acquire Casedhole Holdings Inc. for approximately $272.5 million in cash, a deal that will add wireline services to the oilfield-services provider's offerings and also expand its geographic reach. General Dynamics Corp.'s (GD) Chairman and Chief Executive Jay L. Johnson plans to retire from both posts at year's end and will be succeeded by the defense contractor's recently promoted chief operating officer. Pep Boys-Manny Moe & Jack's (PBY) fiscal first-quarter profit plummeted 91% as the auto-care company pointed to a mild winter and business-execution problems for its weak results. Ruby Tuesday Inc. (RT) said its chairman and chief executive Sandy Beall plans to step down and said a committee has been formed to identify a successor. J.M. Smucker Co.'s (SJM) fiscal fourth-quarter earnings rose 9.7%, thanks in part to fewer restructuring charges, as the food company's sales grew more than expected in spite of lower product volume. Home-furnishing closeout retailer Tuesday Morning Corp. (TUES) said late Wednesday it has ousted Chief Executive Kathleen Mason as the company also lowered its full-year guidance. The moves came after activist investment firm Becker Drapkin Management LP earlier Wednesday reported a 5.02% stake in the company and criticized its performance and leadership. -Write to Mia Lamar at mia.lamar@dowjones.com
