Among the companies with shares expected to actively trade in Wednesday's session are Apple Inc. (AAPL), Edwards Lifesciences Corp. (EW) and VMware Inc. (VMW).

In addition to raising its buyback program and increasing its dividend, Apple Inc. (AAPL) reported a mixed bag of fiscal second quarter results, notching its first profit drop in more than a decade, though revenue was slightly higher than expected. And while the Silicon Valley company quieted fears that its gadgets have lost their edge, reporting strong demand for its iPhones and iPads, the company posted that profit dropped and signaled that new products may not arrive as quickly as investors hoped. Shares fell 3.5% to $392.05 premarket.

Edwards Lifesciences reported disappointing sales of its flagship heart valves in the first quarter, leading the medical device firm to lower its full-year sales and earnings guidance. Shares slumped 18% to $68 premarket.

VMware's first-quarter earnings declined 9.3% as realignment charges weighed on the software maker's results, though services revenue rose and expense controls improved core earnings. While the company maintained its full-year revenue outlook, it forecast second-quarter revenue below analyst estimates. Shares fell 3.6% to $72.99 premarket.

Lumber Liquidators Holdings Inc. (LL) again smashed consensus estimates with its first-quarter results, as the closeout flooring retailer's same-store sales jumped 15% amid increased purchases and order sizes, while gross margin was further aided by lower product costs. The company raised the year's forecasts as Chief Executive Robert Lynch noted that Lumber Liquidators continues "to aggressively pursue share in our highly fragmented market." Shares rose 6.4% to $75 premarket.

Yum Brands Inc.'s (YUM) first-quarter earnings fell 26% as the fast-food chain's business in China was hurt by negative publicity earlier this year related to safety concerns about its chicken supplies. However, shares of Yum Brands, which affirmed its downbeat per-share earnings 2013 guidance, were up 4.5% at $67.01 premarket.

Amgen Inc.'s (AMGN) first-quarter earnings rose 21% as a significantly lower tax rate offset disappointing sales, especially of its key arthritis and osteoporosis drug. Shares fell 6.1% to $105.93 in premarket trading.

Unisys Corp. (UIS) swung to a first-quarter loss as the information-technology company saw revenue declines across both of its businesses. Shares of the company, which provides information-technology services and software for commercial and government clients, dropped 20% to $16.50 in premarket trading.

Vocus Inc.'s (VOCS) first-quarter loss narrowed as the marketing cloud provider's revenue improved, though shares slumped after hours as the company lowered its full-year guidance and provided weak estimates for the current quarter. Shares tumbled 32% to $9.10 premarket.

Broadcom Corp.'s (BRCM) first-quarter profit more than doubled as the chip maker continued to benefit from growth in the mobile market. Chief Executive Scott McGregor said the better-than-expected results in the latest quarter were driven by wireless baseband and connectivity chips. Shares rose 4.9% to $34.60 premarket.

Cree Inc.'s (CREE) fiscal third-quarter profit more than doubled as the energy-efficient light maker saw its sales of lighting products jump. Shares fell 5.5% in premarket trading to $54.50, however, as earnings met the company's expectations but revenue fell short.

Enzon Pharmaceuticals Inc. (ENZN) unveiled a special dividend, a move that comes as the biopharmaceutical company concluded a review of strategic alternatives. Shares jumped 9.7% to $4.20 premarket.

Juniper Networks Inc. (JNPR) posted sharply higher earnings as its core telecommunications customers bought new equipment, but spending by other enterprise customers remained feeble. Shares dropped 6.4% to $16.25 in premarket trading as the company warned of "continued weakness" among enterprise customers, which included particularly slower sales to financial- and government-sector customers in the first quarter.

Panera Bread Co.'s (PNRA) first-quarter earnings rose 17% as the bakery-cafe chain's results continued to improve, though same-store sales fell below the company's expectations. Shares dropped 5.5% premarket to $170.57.

 
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AT&T Inc. (T) reported first-quarter profit grew 3.2% and strong customer additions as a seasonal drop in smartphone sales helped raise profitability of its wireless service.

Food and vegetable company Chiquita Brands International Inc. (CQB) has named Rick Frier chief financial officer, replacing Brian W. Kocher.

C.R. Bard Inc.'s (BCR) first-quarter earnings fell 35% as the medical-device company was hurt by litigation-related charges and other items as well as higher expenses that offset modest revenue growth.

DeVry Inc.'s (DV) fiscal third-quarter earnings fell 15% as the for-profit education company continued to report slower enrollments, particularly at its namesake university.

Ethan Allen Interiors Inc.'s (ETH) fiscal third-quarter profit fell 84% as the furniture maker said it was hurt by a decline in shipments to China and unfavorable holiday timing. Furthermore, the year-earlier quarter benefited from a one-off tax benefit. Results fell short of Street expectations.

Everest Re Group Ltd.'s (RE) first-quarter earnings rose 26% as the insurer earned more from premiums and continued to be helped by an absence of costly disasters.

FedEx Corp. (FDX) said Tuesday it had retained a multibillion-dollar contract o fly domestic mail on behalf of the U.S. Postal Service, fending off efforts y rivals including United Parcel Service Inc. (UPS) to secure the business.

Hanesbrands Inc. (HBI) swung to a first-quarter profit as the apparel maker's margins improved sharply, with some help from lower cotton costs, though sales were hurt by delayed income tax returns and unfavorable weather trends.

HomeAway Inc.'s (AWAY) first-quarter profit more than doubled as growth in new listings boosted the vacation-home rental website's revenue. However, the company lowered its full-year revenue projections.

IRobot Corp.'s (IRBT) first-quarter earnings surged as the robot maker said it is seeing better-than-expected demand for its home robots in the U.S. Results beat the company's raised expectations.

Standard & Poor's Ratings Services lowered its outlook on Newmont Mining Corp. (NEM) to negative from stable, pointing to the likelihood that gold prices might remain low or decline further.

Nabors Industries Ltd.'s (NBR) first-quarter earnings fell 26% as the oil-and-gas drilling contractor was hit by weaker profits in its main business segments, including a steep decline in its U.S. lower 48 drilling and rig-services division.

Norfolk Southern Corp.'s (NSC) first-quarter earnings rose 9.8%, boosted by the sale of land, although the railroad company recorded a slight drop in railway operating revenue as coal revenue continued to slump.

Owens-Illinois Inc.'s (OI) first-quarter profit fell 43% as the bottle manufacturer was hurt by weaker sales, particularly in Europe. However, per-share earnings topped analysts' estimates.

Robert Half International Inc.'s (RHI) first-quarter earnings increased 16% as the temporary-staffing company's margins improved and as its Protiviti unit recorded a double-digit revenue gain.

Rock-Tenn Co.'s (RKT) fiscal second-quarter profit soared as the paper-and-packaging company reported stronger revenue in its corrugated-packaging segment as well as a large alternative-fuel related tax adjustment. Revenue missed Wall Street estimates.

Total System Services Inc.'s (TSS) first-quarter earnings increased 1.1% as the payment-services company paid less in income taxes, though revenue was relatively flat.

W.R. Berkley Corp.'s (WRB) first-quarter profit fell 14% as the specialty insurer saw fewer investment gains, though revenue and premiums written increased.

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

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