Updated from 12:25 p.m.

Shares of Sonic Solutions ( SNIC) were among technology's losers Wednesday, falling 16.2% after the company warned that fourth-quarter numbers would fall below forecasts.

Excluding items, the company posted earnings of $4.9 million, or 18 cents a share, on sales of $20.6 million. Analysts polled by Thomson First Call were expecting earnings of 16 cents a share on sales of $21.1 million. Looking ahead, Sonic Solutions forecast fourth-quarter earnings of 25 cents to 27 cents a share on sales of $35 million to $38 million. Analysts had been expecting earnings of 28 cents a share on sales of $39.3 million. For 2006, Sonic expects GAAP earnings of $1.20 to $1.30 a share on sales of $155 million to $165 million. Analysts are expecting earnings of $1.36 a share on sales of $172.5 million. Shares traded down $2.93 to $15.19.

Amkor Technology ( AMKR) fell 18.6% after the company posted a fourth-quarter loss that was wider than expected and warned that first-quarter results would fall short of expectations. The semiconductor assembly and test services company posted a loss of $36.1 million, or 21 cents a share, on sales of $453.2 million. Analysts were expecting a loss of 19 cents a share on sales of $455.5 million.

Looking ahead, Amkor forecast a first-quarter loss of 34 cents to 40 cents a share on an 8% to 12% sequential sales decline, or sales of $398.8 million to $416.9 million. Analysts had been expecting a smaller loss of 23 cents a share on sales of $438.8 million. "Our customers remain cautious about end-market demand and are exercising tight control over inventory. The high degree of uncertainty in the semiconductor sector is reflected by continued weakness in our customers' forecasts going into what is typically a seasonally down first quarter," Amkor said. Shares traded down 90 cents to $3.94.

Shares of Manhattan Associates ( MANH) fell 11.9% after the company posted fourth-quarter earnings that matched expectations but warned that first-quarter earnings would fall short of expectations. The company posted adjusted earnings of $5.7 million, or 19 cents a share, on sales of $55.8 million. Analysts were expecting earnings of 19 cents a share on sales of $52.9 million. Looking ahead, the provider of supply-chain execution and optimization technology forecast first-quarter earnings of 15 cents to 19 cents a share, short of the 20 cents that analysts had been expecting. For all of 2005, the company expects adjusted earnings of 88 cents to 94 cents a share, in line with expectations. Shares traded down $2.66 to $19.78.

Vicor ( VICR) fell 11.8% after the company posted fourth-quarter results that were lower than expected. The maker of power components and systems posted a loss of $2.02 million, or 5 cents a share, on sales of $40.6 million. Analysts were expecting a loss of 1 cent a share on sales of $43.7 million. "The fourth quarter was characterized by adverse market conditions but demand from key end markets has recently increased," the company said. Looking ahead, the company said it expects a profitable 2005, modest sales growth and an improvement in gross margins. Analysts are expecting 2005 earnings of 14 cents a share on sales of $190.2 million. Shares traded down $1.49 to $11.09.

Shares of Emageon ( EMAG) rose 15% on its first day of trading as a public company. The provider of health-care software sold 5 million shares at $13 apiece, raising $65 million. The pricing came in at the low end of its expected range of $13 to $15 a share. Wachovia Capital Markets and Piper Jaffray led the underwriting syndicate. Shares traded up $1.95 to $14.95.

Other technology movers included Cisco ( CSCO), down 61 cents to $17.63; Microsoft ( MSFT), down 17 cents to $26.07; Intel ( INTC), down 11 cents to $23.30; Sirius Satellite ( SIRI), up 6 cents to $5.99; Level 3 Communications ( LVLT), down 38 cents to $2.26; Applied Materials ( AMAT), down 36 cents to $16.51; Oracle ( ORCL), down 30 cents to $13.17; and Lucent ( LU), down 10 cents to $3.29.

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