Among companies with shares expected to actively trade in Thursday's session are Citigroup Inc. (C), K-Swiss Inc. (KSWS) and CBS Corp. (CBS).

Citi's fourth-quarter profit didn't improve as much as analysts anticipated. The miss comes as Citi's past benefits from boosting the bottom line with the release of past loan-loss reserves continue to dwindle. Shares fell 2.7% to $41.29 premarket.

E. Land World Ltd., a South Korean conglomerate specializing in fashion and retail distribution, will acquire all outstanding common stock of shoe maker K-Swiss for $4.75 per share in cash, or a total of about $170 million, the two companies said. K-Swiss shares rose 48% to $4.72 premarket.

CBS is taking steps to divest itself of its outdoor advertising business, disclosing Wednesday that it will convert the North and South American operation into a real-estate investment trust and put its European and Asian outdoor businesses up for sale. Shares jumped 10% to $41.75 premarket.

Power-One Inc. (PWER) forecast a surprise fourth-quarter loss as a soft renewable-energy business, primarily in Italy and Germany, hurt sales. Shares dropped 15% to $3.70 premarket as the maker of power-supply products said it now expects revenue between $190 million and $195 million, down from its October projection of $210 million to $230 million.

Nutritional-supplement maker Herbalife Ltd. (HLF) said preliminary results for its fourth quarter and for 2012 were above its prior expectations. However, shares dropped 2.1% to $44.13 premarket, perhaps reflecting investor disappointment that the company didn't accelerate its stock buyback, as Fox News earlier this week reported was expected.

Brean Capital downgraded biotechnology company Celsion Corp. (CLSN) to sell from buy, saying in a note to clients the move is "due to robust share price strength prior to a highly binary event in 1Q13 that, in our view, will define whether or not the company remains viable thereafter." The event Brean referred to is results from a clinical trial for the company's liver cancer treatment, expected this month. The current valuation leads Brean to expect more downside from negative results than sustainable upside from positive results. Shares off 8.6% to $7.40 premarket.

Nu Skin Enterprises Inc. (NUS) raised its fourth-quarter earnings and revenue guidance, sending the seller of anti-aging skin-care products shares up 5.6% to $44.88 premarket.

Vivus Inc. (VVUS) received a downgrade to sell from hold by Brean Capital, which said that following a meeting with the biopharmaceutical company's management last week, the firm noted that still only one in five patients are covered by insurance for the company's weight management drug Qsymia, "leading to continued prescription sticker shock even with free low dose drug as offered by Vivus ($150 versus almost twice that amount) for most patients." In a note to clients, Brean said "the competitive environment is only going to increase" and competitors Arena Pharmaceuticals Inc. (ARNA) and Orexigen Therapeutics Inc. (OREX) have larger salesforces. Shares off 5% to $13.60 premarket.

Country Style Cooking Restaurant Chain Co. (CCSC) said it anticipates fourth-quarter revenue to be slightly lower than its previous guidance, as new stores have opened at a slower-than-expected rate. American depositary shares of the China-based fast-food restaurant were down 6.2% at $7.60 in premarket trading.

Northern Tier Energy LP (NTI) is offering nine million units representing limited-partner interests in the partnership held by Northern Tier Holdings LLC. The energy company, which has refining, retail and pipeline operations, said it would have about 91.9 million units outstanding after the offering. Northern Tier won't receive any proceeds from the sale. Units were off 3.3% to $24.63 premarket.

Williams-Sonoma Inc. (WSM) reported a solid 4.4% increase in holiday comparable brand revenue and its 4.8% increase in top-line sales puts the company on course for its fiscal fourth-quarter target, given holiday weeks usually make up about 70% to 75% of total quarter revenue. But the company's fourth-quarter earnings-per-share outlook stayed pat, and analysts were expecting the EPS target to go a couple cents higher. Shares were down 3.5% to $45.50 premarket.

Aveo Pharmaceuticals Inc. (AVEO) said it plans to offer an undisclosed number of shares Wednesday, As of Nov. 1, the drug maker had about 43.7 million shares outstanding. Shares fell 1.6% to $7.99 premarket.

 
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A.M. Castle & Co. (CAS) unveiled restructuring plans, including plans to cut its workforce by about 10%, that will help the specialty metals and plastics distributor cut costs and improve operating performance.

Bank of the Ozarks Inc.'s (OZRK) fourth-quarter profit jumped 18% as the regional bank's noninterest income strengthened and credit quality improved.

Clarcor Inc.'s (CLC) fiscal fourth-quarter earnings slipped 2.5% as it recorded weaker sales in its engine/mobile filtration and packaging divisions. The filter-and-packaging company also offered guidance for the new year below analyst expectations.

Columbia Sportswear Co. (COLM) lowered its fourth-quarter expectations as the maker of active outdoor apparel's net sales were hurt by mild winter weather in North America during most of the holiday shopping season, lower customer traffic in key markets and a more promotional environment.

EBay Inc. (EBAY) on Wednesday posted a sharp drop in fourth-quarter profit due to the big gain the e-commerce giant recorded the same period last year from its sale of the Skype Internet phone service. Excluding the Skype comparison and a resulting 62% drop in earnings, eBay turned in quarterly performance that largely met Wall Street expectations and bolstered faith in the ongoing turnaround of its core business.

Oilfield products company Forum Energy Technologies Inc. (FET) lowered its full-year earnings projection, pointing to lower than anticipated customer spending on capital equipment and consumable products especially in its drilling product line, among other factors.

H.B. Fuller Co.'s (FUL) fiscal fourth-quarter profit fell 4.9% as the paint and adhesive maker's year-ago results included recorded flat margins and higher expenses, though revenue continued to strengthen.

Kinder Morgan Inc.'s (KMI) fourth-quarter earnings more than doubled as the energy company reported strong performances from its affiliates Kinder Morgan Energy Partners LP (KMP) and El Paso Pipeline Partners LP (EPB), driven by strong demand for the transport of natural gas.

Liquidity Services Inc. (LQDT) said its fiscal first-quarter gross merchandise volume missed its expectations, due to several delayed energy equipment sales within the company's capital assets group.

Michael Baker Corp. (BKR) said its chairman, Richard L. Shaw, will retire at the end of the month, and will be succeeded by current board member Robert N. Bontempo.

SLM Corp. (SLM) reported better core earnings than expected in the fourth quarter, but its level of uncollectible loans jumped. The U.S.'s largest education loan company, commonly known as Sallie Mae, has cautioned that its charge-off rate would rise as it steers more of its borrowers into repayment plans rather than forbearance, which is a period of suspended payment. But the jump in uncollectible loans was more grave in the latest period than in the third quarter, when it first warned of the trend.

Recreational-vehicle maker Thor Industries Inc. (THO) has named former IDEX Corp. (IEX) executive Dominic Romeo as its chief financial officer.

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

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