David Einhorn Goes Big on Tech Stocks

NEW YORK ( TheStreet) -- Hedge fund manager and short seller David Einhorn has initiated stakes in troubled technology stocks, including Research In Motion ( RIMM), Dell ( DELL) and Yahoo! ( YHOO).

Einhorn, who runs the hedge fund Greenlight Capital, released the positions in his 13F, a form filed with the Securities and Exchange Commission. He also bought CA ( CA), Best Buy ( BBY) and Omnivision Technologies ( OVTI).

During the fourth quarter, Einhorn purchased 14.1 million shares of Dell, 2.92 million shares of RIM, and just over 3 million shares in Yahoo! He has previously had a stake in Yahoo!, but sold it after the company ran into problems with its holding in Alibaba Group. That has since been resolved.

He also added stakes in several other non-tech companies, including CF Industries ( CF), DST Systems ( DST) and Xerox ( XRX).

Einhorn raised his stakes in technology companies such as Apple ( AAPL) and Marvell Technology ( MRVL). Einhorn added 150,000 shares to his position in Apple to 1.46 million shares, while upping his Marvell stake 733,557 shares to 1.74 million shares.

He maintained his position sizes in Microsoft ( MSFT), Seagate Technology ( STX) and Sprint Nextel ( S).

Einhorn owns 15.1 million shares in Microsoft, 14.5 million shares in Seagate, and 73.8 million shares in Sprint Nextel.

Check out the rest of David Einhorn's portfolio.

Interested in more on Research In Motion? See TheStreet Ratings' report card for this stock.

Check out our new tech blog, Tech Trends.

-- Written by Chris Ciaccia in New York

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