Investors were mainly bidding up tech stocks in extra-session trading Wednesday, as a security software maker bolted higher, as did an Internet and media giant.


(SYMC) - Get Report

, the maker of Norton Antivirus, among other products, was up 8.2% to $37.50 after the company

beat fourth-quarter estimates and raised its guidance for 2003. Meanwhile,

AOL Time Warner


, which posted a mammoth loss, rose 3.6% to $20 despite cutting its

cash-flow targets for the rest of the year.



was up after the maker of analog and communications chips offered its latest

quarterly report and guidance, while

On Semiconductor


dropped 14.9% to $5.10 after disclosing plans to sell more stock.

Among other active, widely held issues, the

Nasdaq 100 Unit Trust

(QQQ) - Get Report

was inching up 0.2% to $32.55.


(CSCO) - Get Report

was gaining 0.3%, and



was flat.


(INTC) - Get Report



(MSFT) - Get Report



(ORCL) - Get Report

were all fractionally higher.

Simplex Solutions


was the big percentage winner, jumping 41% to $17.35 on news that

Cadence Design


will acquire the company for $18 a share in a deal valued at about $300 million. Simplex ended

regular trading at $12.30. Another winner was

ESS Technology


, which rose 14% to $20.45 after beating Wall Street's expectations for the latest quarter.

The losers included



, which dropped 15.4% to $20.99, after the medical diagnostic products maker posted earnings, and

F5 Networks

(FFIV) - Get Report

, which lost 12% to $11.50 following the revelation that previous third-quarter targets were too high.