Among the companies whose shares are expected to see active trade in Wednesday's session are J.P. Morgan Chase Co., Intel Corp., Apple Computer Inc., Pfizer Inc. and Coca-Cola Co.

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Apple Computer Inc. (AAPL) is expected to report fiscal second-quarter earnings of 43 cents a share, according to analysts polled by Thomson First Call.

Coca-Cola Co. (KO) is seen posting a first-quarter profit of 48 cents a share/

EBay Inc.'s (EBAY) first-quarter per-share profit is expected to be 24 cents.

General Dynamics Corp. (GD) is expected to post a per-share profit of 84 cents in its first quarter.

Intel Corp. (INTC) is seen reporting first-quarter earnings of 23 cents.

J.P. Morgan Chase Co.'s (JPM) first-quarter results are expected to show a per-share profit of 84 cents.

Kraft Foods Inc. (KFT) is expected to report first-quarter earnings of 42 cents a share.

Pfizer Inc. (PFE) is seen posting a first-quarter profit of 53 cents a share.

Qualcomm Inc.'s (QCOM) fiscal second-quarter per-share profit is expected to be 40 cents.

United Technologies Corp. (UTX) is expected to post a first-quarter profit of 73 cents a share.

After Tuesday's closing bell, International Business Machines Corp. (IBM) said first-quarter profit rose 22% after the technology giant cut costs in its services business and sold its struggling personal computer business to a Chinese rival. See full story.See After Hours column.

Watch list

Allstate Corp. (ALL) reported first-quarter results that topped analysts' expectations as fewer catastrophes, less frequent claims and the release of prior-year reserves boosted profit. See full story.

Amgen Inc. (AMGN) reported robust first-quarter earnings that surpassed the $1 billion mark, owing much of its performance to strong sales of its flagship drugs Aranesp, Neupogen and Neulasta. See full story.

CSX Corp. (CSX) posted a drop in its net first-quarter profit, but pointed to strong demand for railroad and intermodal surface freight for a 56% jump in adjusted earnings from ongoing operations. See full story.

Cymer Inc. (CYMI) said its first quarter net income soared to $20.6 million, or 52 cents a share, from $5.4 million, or 14 cents a share, from the same period a year ago. Revenue at the San Diego-based supplier of lasers used in semiconductor manufacturing rose 50% to $127.1 million from $84.8 million last year. Analysts were expecting a profit of 42 cents a share on revenue of $120.4 million, according to consensus estimates from Thomson First Call.

Illumina Inc. (ILMN) said its first-quarter net loss was $104,000, or breakeven on a per-share basis, compared with a net loss of $1.24 million, or 3 cents a share, during the same period in the prior year. On a pro forma basis, the company reported per-share income of 7 cents for the first quarter. During the same period last year, the pro forma per-share result was a loss of 3 cents. Analysts polled by Thomson First Call had expected quarterly per-share income of a penny. The genetic analysis technology company said quarterly revenue was $29.1 million, compared with $15.1 million last year. Analysts had expected revenue of $24 million.

Gilead Sciences (GILD) said it earned $262.7 million, or 55 cents a share in the first quarter, up from $157.1 million, or 34 cents a share, in the same period a year go. Excluding stock option expenses, the company would have earned 59 cents a share. Revenue came in at $692.9 million, a 61% jump, driven largely by strong sales of its HIV drugs. The average estimate of analysts polled by Thomson First Call had been for Gilead to earn 53 cents a share on revenue of $615 million.

Motorola Inc. (MOT) said first-quarter profit fell slightly because of stock-option expenses, but the world's No. 2 maker of wireless phones shipped a record 46.1 million handsets. See full story.

Shares of PLX Technology Inc. (PLXT) reported first-quarter earnings of $1.54 million, or 5 cents a share. During the same period a year ago, the company posted a net loss of $541,000, or 2 cents a share. Revenue at the Sunnyvale, Calif.-based chip maker rose to $20 million from $13.2 million a year ago. Pro forma earnings were 11 cents vs. breakeven on a per-share basis for the quarter. Analysts polled by Thomson First Call had forecast first-quarter revenue of $17 million.

Seagate Technology (STX) reported a 20% increase in its fiscal third-quarter profit, as revenue climbed 16% on strong demand for products across its segments. See full story.

Sovereign Bancorp Inc. (SOV) said first-quarter profit dipped slightly from a year earlier, as the flattening of the yield curve dented the regional lender's results. See full story.

Standard Microsystems Corp. (SMSC) reported fiscal fourth-quarter net earnings of $3.75 million, or 16 cents a share. In the same quarter last year, the company reported a net loss of $2.82 million, or 15 cents a share. Revenue at the Hauppauge, N.Y.-based semiconductor solutions provider rose 54% to $84.6 million from $54.9 million.

Teradyne Inc. (TER) reported first-quarter net earnings of $44.9 million, or 23 cents a share. In the same period last year, the company reported a net loss of $52.6 million, or 27 cents a share. Revenue at the Boston-based semiconductor component maker surged 73% to $362.9 million from $210.4 million last year. Teradyne expects second-quarter earnings of 31 cents to 35 cents a share on revenue of $360 million to $380 million.

Texas Instruments Inc. (TXN) reported its net income rose 42% on surging demand for its chips used in mobile phones. See full story.

The percentage of employees at Wal-Mart Stores Inc. (WMT) who work part time has risen, the company said. See full story.

Yahoo Inc. (YHOO) said first-quarter profit fell 22% on higher operating expenses and employee stock option costs, even while sales surged on growth in the Web giant's online advertising business. See full story.