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) --

Red Hat

(RHT) - Get Red Hat, Inc. Report

shares plunged 9.91% to $50.90 before market open on Thursday as investors responded to the software maker's

first-quarter results

, released late on Wednesday.

The Raleigh, N.C.-based firm cruised past analysts' first-quarter estimates, although weak billings and second-quarter guidance sent shares plummeting in extended trading.

Shares of

Micron Technology

(MU) - Get Micron Technology, Inc. Report

were also down in premarket trading, off 1.63% to $6.02 before market open as investors digested the company's third-quarter results. The semiconductor specialist reported a worse-than-anticipated quarterly loss after market close on Wednesday amid declining margins in its NAND Flash products.

Micron was also one of the most active


stocks in premarket trading on share volume of 90,120.

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(ORCL) - Get Oracle Corporation Report

shares rose 0.81% to $28.72. The database giant's shares closed up 1.9% on Wednesday, boosted by strong

fourth-quarter earnings

earlier this week.

Oracle was another active premarket Nasdaq stock on share volume of 64,172.

In a filing with the

Securities and Exchange Commission

on Thursday, Oracle confirmed that Keith Block, the firm's executive vice president for North America sales and consulting, has decided to leave the firm "to pursue other opportunities."


(AAPL) - Get Apple Inc. Report

, which suffered an

iCloud outage

on Wednesday, was down 0.14% to $584.91 before market open.

--Written by James Rogers in New York.

Follow @jamesjrogers

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