Shares of Ultratech ( UTEK) were among technology's losers Thursday, sinking 17% after the chip-equipment maker said fourth-quarter results will be worse than expected.

The company now sees a loss of 25 cents to 30 cents a share, wider than its prior forecast for a loss of 10 cents to 15 cents a share. Ultratech projects a sequential revenue decline of 25% to 30%, while its earlier forecast called for a decline of 8% to 10%. Analysts polled by Thomson First Call project a loss of 12 cents a share and revenue of $30.7 million.

"The revenue shortfall is due primarily to delivery push-outs during the quarter reflecting the softer business conditions," Ultratech said. Shares were trading down $2.18 to $10.86.

Jabil Circuit ( JBL - Get Report) slid 10% after the electronics services provider warned that second-quarter revenue would be below forecasts. For the recently ended first quarter, Jabil reported revenue of $3.2 billion, up from $2.4 billion a year earlier and topping Wall Street's estimate of $3.17 billion. The company, which is still reviewing its historical stock-option practices, didn't release its bottom-line figures.

Jabil forecast second-quarter revenue of $2.75 billion to $2.85 billion, below analysts' average forecast of $2.91 billion. Shares were down $2.63 to $23.93.

Shares of Sonic Foundry ( SOFO) tumbled 11% after the software company priced a secondary offering at a substantial discount to Wednesday's closing price of $5.04. The company sold 3 million shares at $3.75 a share, raising $11.25 million. Sonic plans to use proceeds from the offering for research and development, business development activities and other corporate needs. Shares recently changed hands at $4.48, down 56 cents.

Shares of PMC-Sierra ( PMCS) fell 5% after the chipmaker cut its fourth-quarter revenue forecast. The company now sees revenue of $100 million to $105 million, down from an earlier forecast of $105 million to $112 million. Analysts project revenue of $108.9 million.

"The revision in outlook for revenues is primarily attributable to changes in customer demand during the quarter related to the company's communications products," PMC said. Shares were falling 34 cents to $6.55.

Hauppauge Digital ( HAUP) jumped 15% after the company said it swung to a fourth-quarter profit. The company, a developer of analog and digital TV receiver products, earned $50,920, or a penny a share, for the quarter ended Sept. 30. A year earlier, the company posted a loss of $864,371, or 9 cents a share. Revenue rose to $22.2 million from $15.4 million a year earlier.

"Helping the sales increase in the quarter was growth in sales of our digital TV tuner receivers for PCs and notebooks plus sales growth of TV receivers for Media Center PCs," Hauppauge said. "In addition, we saw a turnaround in European sales when compared to the previous year's fourth quarter." Shares were trading up 96 cents to $7.15.

Other technology movers included ( MAMA), up 98 cents to $8.29; Sirius Satellite Radio ( SIRI), down 2 cents to $3.77; Intel ( INTC), down 15 cents to $20.45; Sun Microsystems ( SUNW), down a penny to $5.57; Cisco Systems ( CSCO), up 14 cents to $27.53; Microsoft ( MSFT), down 2 cents to $30.07; Apple Computer ( AAPL), down 12 cents to $84.64; and Alcatel Lucent ( ALU), up 11 cents to $14.26.