Shares of Sierra Wireless ( SWIR - Get Report) were among technology's winners Thursday, climbing 14% after the wireless-equipment maker lifted its fourth-quarter sales guidance.

The company now sees sales of $37 million, above an earlier view of $32 million. As a result, Sierra Wireless expects its bottom-line results will be better than its previous guidance. In October, the company projected that it would post a fourth-quarter loss of $2.9 million, or 12 cents a share. Analysts polled by Thomson First Call are looking for a fourth-quarter loss of 10 cents a share and sales of $32.4 million. Cash flow, which was expected to be negative, is now expected to be positive during the quarter, the company said. Shares were trading up $1.65 to $13.21.

Integrated Silicon Solution ( ISSI) dropped 10% after the semiconductor company lowered its first-quarter sales forecast. The company now sees sales of $51 million to $52 million, below its previous view of $62 million to $64 million. "Although demand was about what we expected during the quarter, the average selling prices for our DRAM product line were lower than we planned," the company said. "DRAM selling prices were under pressure, especially in November and December." Integrated Silicon plans to release its financial results on Jan. 30. Shares were trading down 67 cents to $6.28.

Shares of Xilinx ( XLNX - Get Report) rose 7% after the chipmaker lifted its third-quarter sales forecast for the second time in a month. The company now sees sequential sales growth of 11% to 12%, up from the 4% to 8% growth that it forecast in December. Xilinx said the sales growth is being driven by strong results in North America, Asia Pacific and Europe. Analysts expect third-quarter sales of $422.5 million, or sequential sales growth of about 6%. Shares were trading up $2 to $28.93.

II-VI ( IIVI - Get Report) slumped 13% after the company cut its second-quarter earnings forecast. The company, which makes optical and opto-electronic components, lowered its earnings projection to 16 cents to 18 cents a share from an earlier forecast of 21 cents to 23 cents a share. Sales for the quarter ended Dec. 31 are now seen at about $55 million, compared with an earlier forecast of $55 million to $56 million. Analysts are looking for earnings of 22 cents a share and sales of $55.8 million. A year earlier, the company posted sales of $43.2 million.

"While our order intake remains strong across all business segments, during the just completed quarter we have experienced some unexpected production challenges resulting in a decrease from the Sept. 30, 2005, quarter in the amount of revenues generated by our infrared optics business segment and significant scrap costs at our military infrared optics business segment," the company said. II-VI expects to post full financial results on Jan. 18. Shares were trading down $2.22 to $15.22.

Shares of BMC Software ( BMC) drifted lower Thursday, a day after buyout rumors lifted shares in the business software maker. On Wednesday, shares moved up 10% after rumors surfaced that private equity firm Texas Pacific Group may be interested in buying the company. In recent trading, shares of BMC were trading down $1.12, or 5%, to $21.95.

Other technology movers included Cisco ( CSCO), up 48 cents to $18.33; Lucent Technologies up 5 cents to $2.77; Sun Microsystems ( SUNW), up 17 cents to $4.58; Oracle ( ORCL - Get Report), up 28 cents to $12.90; Sirius Satellite Radio ( SIRI), up 8 cents to $6.44; Intel ( INTC - Get Report), up 32 cents to $26.23; JDSU ( JDSU), up 12 cents to $2.62; and Microsoft ( MSFT), up 5 cents to $27.02.