Updated from 1:11 p.m. EDT

Shares of

Provide Commerce

(PRVD)

were among the best-performing technology stocks Thursday, rising 30.8% after the company beat first-quarter expectations and raised full-year guidance.

The company, which operates an e-commerce marketplace, posted a pro forma loss of 2 cents a share on sales of $19.9 million. Analysts were expecting a loss of 7 cents a share on sales of $18.1 million.

A year ago, the company posted a loss of 6 cents a share on sales of $13 million. Looking ahead, the company forecast full-year pro forma earnings of 77 cents to 79 cents a share on sales of $166.5 million to $169.5 million. Analysts had been expecting earnings of 74 cents a share on sales of $163.7 million. Shares traded up $7.20 to $30.55.

Plato Learning

(TUTR)

fell 8.4% after the company warned of disappointing fourth-quarter numbers and said its chief financial officer resigned. The provider of e-learning products expects sales of $41 million to $43 million during the fourth quarter. For the full year, the company expects earnings near break-even on a pretax basis, with sales between $140 million and $142 million. Analysts are expecting earnings of 27 cents a share on sales of $44.8 million for the fourth quarter and a profit of 9 cents a share on sales of $144.2 million for the year.

The company also announced the resignation of Chief Financial Officer Greg Melsen. Larry Betterley, who joined the company in June, will replace Melsen. Melsen is leaving the company so that he can join a Minneapolis-based life sciences company. Shares traded down 66 cents to $7.20.

Shares of

Taser International

(TASR)

rose 5.7% after the company said it would introduce a new XP unit with an extended range. The new XP Air Cartridge will have a range of 25 feet. The stun-gun maker said the accuracy and dispersion of the new weapon would be "comparable to that of our standard cartridge at its full 21-foot range." The new cartridge, which will be unveiled at the International Association of Chiefs of Police Conference in Los Angeles on Saturday, will begin shipping in December. Shares traded up $3.12 to $57.95.

Sigma Designs

(SIGM)

fell 15.7% after it warned of a third-quarter sales shortfall. The digital media processor company expects to post sales of $7.6 million when it announces its formal earnings on Nov. 23. Analysts were expecting sales of $9.1 million. Sigma blamed the shortfall on a decline in sales to Asia as well as later-than-expected shipments of its chip sets used for high-definition DVD players featuring Windows Media Video 9. Shares traded down $1.30 to $7.

Shares of

webMethods

(WEBM)

fell 8.4% after the company delayed its quarterly filing with the

Securities and Exchange Commission

. WebMethods said an ongoing internal investigation of an international subsidiary led to the delayed filing.

On Nov. 1, according to the company, "an employee of one of webMethods' international subsidiaries notified webMethods' management of the employee's concerns regarding certain transactions involving a small number of that subsidiary's resellers."

The company says its investigation hasn't yet turned up any evidence supporting the employee's concerns. The quarterly filing will be submitted as soon as possible after the resolution of the investigation, the company said. Shares traded down 60 cents to $6.56.

Other technology volume leaders included

Microsoft

(MSFT) - Get Report

, up 25 cents to $29.98;

Intel

(INTC) - Get Report

, up 31 cents to $23.17;

Nortel Networks

(NT)

, down 21 cents to $3.37;

Cisco

(CSCO) - Get Report

, up 30 cents to $18.74;

Sirius Satellite Radio

(SIRI) - Get Report

, down 1 cent to $3.85;

Oracle

(ORCL) - Get Report

, down 24 cents to $13.14; and

Lucent

(LU)

, up 7 cents to $3.83.