SigmaTel

(SGTL)

said it earned $25.5 million, or 68 cents a share, for the first quarter ended March 31, up from $6.9 million, or 18 cents a share a year ago. Revenue for the quarter was $99.3 million. Excluding items, the company earned $25.4 million, or 67 cents a share. Analysts expected earnings of 46 cents a share on revenue of $85 million. The stock was up $2.75, or 8.96%, to $33.45 in after-hours trading.

Stryker Corp.

(SYK) - Get Report

said that it earned $173.1 million, or 42 cents a share, for the first quarter ended March 31, up 27% from $135.9 million, or 33 cents a share a year ago. Revenue for the quarter was $1.2 billion. Analysts expected earnings of 40 cents a share on revenue of $1.18 billion. The stock was up 2 cents, or 0.02%, to $46.62 in after-hours trading.

Intel's

(INTC) - Get Report

profit rose 25% to $2.2 billion, or 34 cents a share, for the first quarter ended April 2, versus a profit of $1.7 billion, or 26 cents a share a year ago. Revenue for the quarter was $9.4 billion. Wall Street was expecting 31 cents a share on revenue of $9.3 billion, according to Thomson First Call. The company said strong demand for its Centrino notebook computer chips helped boost earnings. The stock was up 74 cents, or 3.27%, to $23.37 in after-hours trading.

CheckFree

(CKFR)

posted third-quarter earnings of $15.6 million, or 17 cents a share, up from $7.7 million, or 8 cents a share, a year ago. Revenue for the quarter was $191.2 million. Excluding items, the company said it earned $36 million, or 39 cents a share. Analysts expected 36 cents a share on revenue of $189.9 million, according to Thomson First Call. The stock was up 20 cents, or 0.52%, to $39 in after-hours trading.

Yahoo!

(YHOO)

rose after posting a first-quarter profit of $205 million, or 14 cents a share, up from $101 million, or 7 cents a share, a year ago. Excluding a gain from the sale of an investment, Yahoo! earned 13 cents a share. Revenue for the quarter was $1.17 billion. Analysts expected earnings of 11 cents on revenue of $796 million, according to Thomson First Call. The stock was up $1.58. or 4.76%, to $34.80.