Updated from 11:55 a.m. EDT

Shares of

Niku

( NIKU) were among the best-performing technology stocks Wednesday after the company posted second-quarter earnings that were better than expected and said third-quarter results would top expectations.

Excluding items, the software company earned 11 cents a share during the second quarter on sales of $15.4 million. Analysts surveyed by Thomson First Call were expecting earnings of 7 cents a share on sales of $14.6 million. Looking ahead, Niku forecast third-quarter earnings of 11 cents to 13 cents a share on sales of $15.5 million to $16.5 million. Analysts were looking for earnings of 9 cents a share on sales of $15.1 million. Shares of Niku traded up $2.74, or 28.5%, to $12.34.

Taser International

(TASR)

rose after the company said it received five new orders for its stun guns. The orders, totaling more than $741,000, were from the Milwaukee County Sheriff's Department, the Douglas County Sheriff's Office in Colorado, and the Martin County, Orange County and Palm Beach County sheriff's offices in Florida. The orders are expected to ship during the third quarter. Shares of Taser traded up $1.13, or 4.3%, to $27.47.

Shares of

Chipmos Technologies

(IMOS) - Get Report

rose after the company posted strong second-quarter earnings and sales. The semiconductor testing and assembly services company posted a profit of 32 cents a share, up from the 5 cents it earned a year ago. Sales, meanwhile, rose 86%, to $128 million. Looking ahead, Chipmos expects third-quarter sales of $115 million to $120 million. Shares traded up 88 cents, or 21.7%, to $4.93.

Network Appliance

(NTAP) - Get Report

rose after it posted first-quarter results that were better than expected and said

second-quarter results could top expectations. Excluding items, the storage-equipment maker posted a first-quarter profit of 13 cents a share on sales of $358.4 million. Analysts were expecting earnings of 12 cents a share on sales of $353.2 million. Looking ahead, Network Appliance forecast earnings of 13 cents to 14 cents a share on sales of $372.7 million to $379.9 million. Analysts were looking for earnings of 13 cents a share on sales of $370.8 million. Shares of Network Appliance traded up $2.31, or 13.3%, to $19.70.

Shares of

Nam Tai Electronics

(NTE)

rose after the company said its chief financial officer purchased 565,400 shares of stock between Aug. 4 and Aug. 18. Ming Kown Koo purchased the shares at an average price of $17.64. His recent purchase postdates a similar purchase in May, when Koo bought 564,000 shares. He now owns about 15.1% of the company's outstanding stock. Shares of Nam Tai Electronics traded up $2.42, or 13.6%, to $20.19.

Other technology volume leaders included

Applied Materials

(AMAT) - Get Report

, up 9 cents to $16.16;

Cisco

(CSCO) - Get Report

, up 31 cents to $18.99;

Intel

(INTC) - Get Report

, up 71 cents to $22.22;

Microsoft

(MSFT) - Get Report

, up 41 cents to $27.46;

Lucent

( LU), up 21 cents to $3.14; and

Oracle

(ORCL) - Get Report

, up 23 cents to $10.51.