Thursday's Tech Winners & Losers: Google

Updated from 2:20 p.m. EDT with new stock prices

SAN FRANCISCO -- Tech investors were seeing green Thursday, with the Nasdaq leading most indices higher. Upward momentum was spurred by falling oil prices and a Commerce Department report that revised first-quarter GDP growth upward to 0.9%. The iShares S&P GSTI Software Index(IGV Quote) rose 1.5%.

Shares of Google(GOOG Quote) were up $14.55, or 2.6%, to $582.79 on a report from comScore that the search giant's paid clicks were up sharply in April -- 19.6% year over year. Paid clicks represent the site's ability to transform queries into clicks on advertising delivered with search results. Susquehanna Financial raised its price target on the stock Thursday to $635 from $600 on the news.

Kosan Biosciences(KOSN Quote) jumped $3.77, or 228.5%, to $5.42 on the report that Bristol-Myers Squibb(BMY Quote) is acquiring the cancer-drug specialist for $5.50 a share.

Shares of Autodesk(ADSK Quote) rose $1.24, or 3.1%, to $40.94 on an upgrade by American Technology Research. Analyst Donovan Gow rated the developer of computer-aided-engineering software a buy with a one-year price target of $52, noting that Autodesk is gaining market share against competitors Dassault Systemes and Parametric Technology(PMTC Quote).

"ADSK is ideally positioned to benefit from the construction boom in emerging economies with two-thirds international revenue exposure," Gow wrote Thursday.

German chipmaker Infineon Technologies(IFX Quote) tumbled on the company's warning that third-quarter revenue would fall short of projections. The stock fell $1.18, or 11.9%, to $8.78, its second decline for the week. The stock dropped 4% Tuesday after the CEO was sacked.

Other notable tech movers: Cisco(CSCO Quote) was up 68 cents, or 2.7%, to $26.22. Sprint Nextel(S Quote) rose 43 cents, or 4.9%, to $9.24.

And Ansys(ANSS Quote) gained $2.48, or 5.7%, to $46.26 on Thursday's report of solid revenue growth at Ansoft(symbol Quote), which it is acquiring.