Monday's Tech Winners & Losers

Updated from 12:53 p.m. EDT

Technology stocks rose modestly Monday, but several stocks slid on company-specific news.

Entegris(ENTG Quote) fell 9.2% after the company, which makes products for semiconductor companies, posted disappointing first-quarter results and warned that second-quarter results would be below Wall Street's forecast. The company posted adjusted earnings of $14.8 million, or 11 cents a share, on revenue of $161.1 million. Analysts polled by Thomson Financial expected earnings of 13 cents a share on revenue of $165.2 million.

Looking ahead, Entegris sees second-quarter adjusted earnings of 10 cents to 12 cents a share on revenue of $155 million to $162 million. Analysts project earnings of 14 cents a share on revenue of $167.4 million. Shares closed down $1.09 to $10.81.

Elsewhere, 8x8(EGHT Quote) fell 6.1% after the Internet telephony provider reported fourth-quarter results. The company posted a loss of $2.3 million, or 4 cents a share, on revenue of $14.4 million. The Thomson Financial single-analyst forecast called for a loss of 3 cents a share on revenue of $13.5 million. During the year-earlier period, the company posted a loss of $6.6 million, or 11 cents a share, on revenue of $10.3 million. Shares closed down 9 cents to $1.39.

Meanwhile, shares of Cogent Communications(CCOI Quote) slipped 0.7% after the Internet communication services company posted better-than-expected first-quarter results but warned that its second-quarter loss would be greater than expected. The company reported a first-quarter loss of $9.4 million, or 19 cents a share, on revenue of $43.6 million. Analysts expected a loss of 21 cents a share on revenue of $43.1 million.

Looking ahead, Cogent sees a second-quarter loss of 20 cents to 25 cents a share on revenue of $45 million to $46 million. Analysts project a smaller loss of 17 cents a share on revenue of $45.7 million. Shares closed down 17 cents to $25.70.