Sirius XM, Sourcefire: Premarket Movers

NEW YORK ( TheStreet) -- Sirius XM ( SIRI) was a gainer in premarket trading on Tuesday after the company beat Wall Street's revenue forecast in its first quarter results.

The satellite radio giant brought in revenue of $805 million, up from $724 million in the prior year's quarter, and above analysts' estimate of $803.83.

Excluding items, Sirius earned 2 cents a share, compared to a penny a share in the same period last year. Analysts surveyed by Thomson Reuters were expecting earnings of 2 cents.

Sirius, which has shock jock Howard Stern as its highest-profile employee, also reiterated its 2012 revenue guidance on Tuesday, predicting sales of $3.3 billion. Analysts are looking for revenue of $3.359 billion.

Shares of Sirius rose 5 cents, or 2.44%, to $2.31 in premarket trading. The New York-based firm was also the most active Nasdaq stock on share volume of 11,819,131.

Security specialist Sourcefire ( FIRE) was another winner after reporting strong first-quarter results after market close on Monday.

Revenue came in at $46.3 million, a 50% hike on the prior year's quarter, and above analysts' forecast of $41.64 million.

Excluding items, Columbia, Md.-based Sourcefire earned 11 cents a share, up from 4 cents a share in the same period last year. Analysts surveyed by Thomson Reuters were looking for earnings of 8 cents a share.

Sourcefire shares climbed $4.91, or 9.63%, to $55.90 before market open.

Social gaming specialist Zynga ( ZNGA), however, was down 29 cents, or 3.42%, to $8.05 as the company's recent first-quarter loss continued to weigh on shares. The San Francisco-based firm was also one of the most active Nasdaq stocks on share volume of 1,364,268.

Groupon ( GRPN) was up 20 cents, or 1.87%, to $10.91, despite plunging on Monday when the company announced the departure of two board members.

--Written by James Rogers in New York.

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