Shares of

Expeditors International of Washington

(EXPD) - Get Report

were among the

Nasdaq's

winners Thursday, soaring 19% after the shipping company handily beat first-quarter estimates and announced a 2-for-1 stock split.

The company earned $52.4 million, or 47 cents a share, on revenue of $1.02 billion. Analysts polled by Thomson First Call expected earnings of 39 cents a share on revenue of $937.8 million. During the year-earlier quarter, the company earned $30.9 million, or 28 cents a share, on revenue of $825.2 million. The company's 2-for-1 stock split will be payable to shareholders of record as of June 9. Shares were trading up $16.34 to $104.10.

ManTech

(MANT) - Get Report

shares jumped 14% after the defense contractor posted better-than-expected first-quarter results. The company reported earnings from continuing operations of $13.3 million, or 39 cents a share, on revenue of $275.3 million. Analysts expected earnings of 38 cents a share and revenue of $274.3 million. A year earlier, the company earned $11.9 million, or 39 cents a share, on revenue of $217.5 million.

Looking ahead, ManTech sees second-quarter earnings of 39 cents to 41 cents a share, with revenue of $285 million to $290 million. Analysts project earnings of 39 cents a share and revenue of $280.8 million. Shares were up $4.58 to $36.95.

Shares of

Wild Oats

( OATS) rose 13% after the operator of natural-foods supermarkets posted first-quarter earnings that easily topped expectations. The company earned $2.9 million, or 10 cents a share, reversing a year-earlier loss of $1.2 million, or 4 cents a share. Revenue grew to $298.4 million from $278.1 million, as same-store sales rose 4.1%. Analysts expected earnings of 4 cents a share and revenue of $299.8 million.

For 2006, Wild Oats continues to forecast earnings of 34 cents to 40 cents a share. Analysts project earnings of 37 cents a share. The food retailer's shares recently were trading at $19.38, up $2.19.

Conseco

(CNO) - Get Report

shares tumbled 10% after the insurer announced the resignation of its CEO and previewed weaker-than-expected first-quarter earnings. The company said William Kirsch is resigning as president, chief executive and director, effective May 23. Conseco named James Hohmann, previously executive vice president and chief administrative officer, as interim CEO. The company has launched a search for Kirsch's permanent replacement.

As for the first quarter, Conseco expects to post a profit of 35 cents a share, down from 44 cents last year. Operating earnings per share, which exclude realized investment gains and losses, are projected to be 36 cents, compared with 43 cents a year ago. Analysts, on average, project operating earnings of 46 cents a share. Conseco will post its full first-quarter results after the bell Thursday. Shares recently changed hands at $22.80, down $2.58.

PolyOne

(POL) - Get Report

rose 5% after the plastics maker posted better-than-expected first-quarter results. The company earned $46.8 million, or 51 cents a share, on revenue of $674.6 million. Legal settlements and adjustments to the company's litigation reserves boosted pretax earnings by $8.8 million in the latest period. Analysts expected earnings of 23 cents a share and revenue of $625.1 million. During the year-earlier period, PolyOne earned $13.4 million, or 15 cents a share, on revenue of $611.8 million. Legal items boosted pretax earnings by $3.7 million during the year-earlier quarter.

Looking ahead, PolyOne sees second-quarter sales at or near those of the first quarter. Analysts project sales of $657.4 million. Shares were trading up 44 cents to $9.58.

Shares of

Electronic Arts

( ERTS) slumped 11% after the video-game publisher posted better-than-expected fourth-quarter results but warned that fiscal first-quarter results would be below expectations. For the quarter ended March 31, the company posted a loss of $16 million, or 5 cents a share, on revenue of $641 million. Excluding items, the company earned $43 million, or 14 cents a share. Analysts expected earnings of 9 cents a share, before items, on revenue of $581 million. During the year-earlier quarter, the company earned $30 million, or 9 cents a share, on revenue of $553 million.

Looking ahead, Electronic Arts sees a second-quarter loss of 22 cents to 28 cents a share, before items. The company predicts revenue of $300 million to $340 million. Analysts project a loss of 18 cents a share and a top line of $421.2 million. The gamemaker's shares were down $6.07 to $48.43.

NYSE

volume leaders included

Nortel Networks

( NT), up 6 cents to $2.78;

Chico's FAS

(CHS) - Get Report

, down $6.38 to $30.72;

Liberty Media

(L) - Get Report

, up 21 cents to $8.60;

Lucent Technologies

( LU), up 2 cents to $2.77;

Tyco

(TYC)

, up 79 cents to $27.73;

Eastman Kodak

( EK), down $1.65 to $25.70;

Bausch & Lomb

( BOL), down $2.46 to $41.51;

Exxon Mobil

(XOM) - Get Report

, up 17 cents to $63.94; and

Time Warner

(TWX)

, down 6 cents to $17.16.

Nasdaq volume leaders included

Microsoft

(MSFT) - Get Report

, up 16 cents to $23.33;

JDSU

(JDSU)

, down 20 cents to $3.44;

Intel

(INTC) - Get Report

, up 25 cents to $19.41;

Sun Microsystems

(SUNW) - Get Report

, up 3 cents to $4.92;

Apple Computer

(AAPL) - Get Report

, up 87 cents to $72.01;

Cisco Systems

(CSCO) - Get Report

, up 32 cents to $21.81; and

ViroPharma

(VPHM)

, down $1.79 to $9.18.