Among the companies whose shares are expected to see active trade in Friday's session are Microsoft Corp., Chevron Corp. and Sun Microsystems Inc.

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Alltel Corp. (AT) is expected to report per-share income of 64 cents for the third quarter, according to analysts polled by Thomson First Call.

Avon Products Inc. (AVP) is expected to post third-quarter per-share income of 24 cents.

Baker Hughes Inc. (BHI) is expected to report earnings of $1.08 per share for the third quarter.

Brunswick Corp. (BC) is expected to report third-quarter earnings of 46 cents per share.

Cardinal Health Inc. (CAH) is expected to post first-quarter per-share income of 76 cents.

Chevron (CVX) is expected to report earnings per share for the third quarter of $2.03.

Constellation Energy Group Inc. (CEG) is expected to post third-quarter income of $1.28 per share.

Coventry Health Care Inc. (CVH) is expected to report income of 92 cents per share for the third quarter.

Exelon Corp. (EXC) is expected to report third-quarter per-share income of $1.05.

Ingersoll-Rand Co. (IR) is expected to post income of 86 cents per share for the third quarter.

After Thursday's closing bell, Microsoft (MSFT) said its quarterly profit and revenue both rose 11 percent, topping expectations, on continued strong demand for its server software and a sharp jump in sales at the Xbox video-gaming unit.

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Akamai Technologies Inc. (AKAM) reported third-quarter sales increased 47 percent, but net income fell nearly 95 percent. The company that provides Internet delivery services reported profit of $14 million, or 8 cents a share, compared to $272 million, boosted by a one-time tax gain, or $1.71 a share from a year ago.

Chesapeake Energy Corp. (CHK) , the biggest U.S. natural gas producer, posted a sharply higher third-quarter profit, citing a continued increase in output and extensive production hedges.

Chubb Corp. (CB) reported a jump in third-quarter net income as the property and casualty insurer benefited from a benign hurricane season. The results topped analyst estimates and the company lifted its full-year profit target.

Denny's Corp. (DENN) said it swung to third-quarter net income, as results gained $67 million from real estate asset sales, of $25.5 million, or 26 cents a share. During the same period in the prior year, the restaurant operator's net loss was $3.43 million, or 4 cents a share.

Eastman Chemical Co. (EMN) said profits tumbled in the third quarter, hit by higher raw material costs and restructuring charges.

Frontier Airlines Holdings Inc. (FRNT) said second-quarter net income fell to $509,000, or 1 cent a share, from $6.91 million, or 18 cents a share, in the same period last year, as expenses rose. The carrier said revenue rose 19 percent to $309.9 million.

Gap Inc. (GPS) said another one of its top executives, Diane Neal, president of Gap Outlet, was leaving the retailer.

Hartford Financial Services Group Inc. (HIG) reported a 41 percent increase in third-quarter net income late Thursday as the company's life insurance and property and casualty divisions both turned in strong performances.

Hittite Microwave Corp. (HITT) reported third-quarter net profit of $11.6 million, compared with $5.11 million in the same period last year. The company posted earnings available to shareholders of $11.6 million, or 37 cents a share, vs. $5 million, 17 cents a share, last year.

Infospace Inc. (INSP) named Allen Hsieh chief financial officer. Hsieh has served as interim CFO of the Internet search and media company since April.

Interphase Corp. (INPH) reported third-quarter net earnings of $175,000, or 3 cents a share. In the same quarter last year, the company reported a net loss of $912,000, or 15 cents a share. Revenue rose 12 percent to $7.76 million from $6.92 million.

Invitrogen Corp. (IVGN) swung to a third-quarter net loss, on a one-time charge, of $129.8 million, or $2.53 a share. In last year's period, Invitrogen made $23.9 million, or 42 cents a share.

Lattice Semiconductor Corp. (LSCC) said it swung to third-quarter net income, as revenue gained, of $897,000, or a penny a share. During the same period in the prior year, the net loss was $7.09 million, or 6 cents a share. Lattice said quarterly revenue rose to $63.5 million from $53.4 million in the prior year, while analysts had expected $64 million.

Massey Energy Co. (MEE) reported third-quarter net earnings of $24.2 million, or 30 cents a share, up 7.6 percent from $22.5 million, or 28 cents a share, during the year-ago period. The coal company posted total revenue of $555.9 million vs. $533.7 million.

McAfee Inc. (MFE) reported third-quarter net earnings of $30.3 million, or 19 cents a share, compared with $22.5 million, or 13 cents a share, in the same period last year, as sales rose. Revenue rose 14 percent to $287.8 million from $252.9 million.

Netgear Inc. (NTGR) said third-quarter net income fell, as the provision for income taxes rose, to $7.98 million, or 23 cents a share, from $8.59 million, or 25 cents a share, during the same period in the prior year. Netgear said quarterly revenue rose to $151.6 million from $111.3 million in the prior year.

On Semiconductor Corp. (ONNN) said its quarterly net income more than tripled from a year ago as it sold more chips used in a range of consumer electronic devices. On Semi reported third-quarter net income of $76.8 million, or 23 cents a share, up from $23.5 million, or 6 cents a share, in last year's period.

Oplink Communications Inc. (OPLK) said it swung to first-quarter net income, as sales gained, of $2.76 million, or 12 cents a share. During the same period in the prior year, the net loss was $440,000, or 2 cents a share.

PortalPlayer Inc. (PLAY) said third-quarter net earnings dropped to $1.49 million, or 6 cents a share, from $10.3 million, or 40 cents a share, in the same period last year. Excluding items, earnings were 13 cents a share, and analysts had expected 12 cents.

Sigma-Aldrich (SIAL) , which makes chemicals used in laboratory research, posted a 7 percent increase in third-quarter profit and raised its outlook for the year on a lower-than-expected tax rate.

Sohu.com Inc. (SOHU) said third-quarter net earnings fell to $6.6 million, or 17 cents a share, from $8.03 million, or 21 cents a share, during the year-ago period, as expenses rose. Revenue rose 29 percent to $35.4 million from $27.4 million a year ago.

Sun Microsystems (SUNW) said its loss narrowed by 55 percent last quarter as revenue continued to improve for the computer server and software maker amid its latest attempts at restructuring and regaining its position among the elite of the business-computing industry.

Varian Semiconductor Equipment Associates Inc. (VSEA) said fourth-quarter net earnings rose to $32.9 million , or 58 cents a share, from $13.6 million, or 24 cents a share, in the same period last year, on the back of strong sales. The maker of chip processing equipment said revenue rose 46 percent to $213.1 million from $146.3 million.

Vertex Pharmaceuticals Inc. (VRTX) said the third-quarter net loss narrowed, as revenue rose, to $51.8 million, or 46 cents a share, from a net loss of $79.6 million, or 84 cents a share, during the same period in the prior year. Quarterly revenue rose to $53.3 million from $36.2 million in the prior year, while analysts had expected $65 million.

Visicu Inc. (EICU) said third-quarter net income fell, as the company recorded an income tax expense, to $2.5 million, or 7 cents a share, from $11.4 million, or 42 cents a share, during the same period in the prior year. Visicu said quarterly revenue rose to $8.16 million from $4.87 million in the prior year.

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