Einhorn's Greenlight Enters Yahoo (YHOO), Trim's Apple (AAPL)

David Einhorn's Greenlight Capital hedge fund released its 13F for the quarter ended 9/30/2012. Below is a summary:

(note - short positions are not disclosed)

New Stakes
Aecom Technology (NYSE: ACM) new 782,704 share position
Babcock & Wilcox Co. (NYSE: BWC) new 860,446 share position
Knight Capital Group (NYSE: KCG) 17,000,000 3.5% notes
Yahoo, Inc. (NASDAQ: YHOO) new 5,050,000 share position

Raised Stakes
Aetna, Inc. (NYSE: AET) raised from 3,169,925 shares to 4,396,255 shares
BIOFUEL ENERGY (NASDAQ: BIOF) raised from 1,358,437 shares to 1,427,819 shares
Cigna Corp (NYSE: CI) raised from 6,435,000 shares to 7,101,800 shares
Computer Sciences Corp. (NYSE: CSC) raised from 3,622,023 shares to 6,866,250 shares
Delphi Automotive PLC (NYSE: DLPH) raised from 8,031,661 shares to 8,145,061 shares
DST Systems Inc., (NYSE: DST) raised from 1,860,000 shares to 2,008,749 shares
Ensco PLC (NYSE: ESV) raised from 178,282 shares to 3,795,665 shares
General Motors (NYSE: GM) raised from 17,426,863 shares to 21,582,063 shares
Marvell Technology Group Ltd (NASDAQ: MRVL) raised from 25,602,479 shares to 32,730,449 shares *

Lowered Stakes
Apple, Inc. (NASDAQ: AAPL) lowered from 1,454,520 shares to 1,090,890 shares
Coventry Health Care, Inc. (NYSE: CVH) lowered from 6,660,000 shares to 2,858,000 shares
Humana, Inc. (NYSE: HUM) lowered from 1,645,000 shares to 777,803 shares
Huntington Ingalls Industries (NYSE: HII) lowered from 2,540,696 shares to 2,139,799 shares
SEAGATE TECHNOLOGY (NASDAQ: STX) lowered from 23,199,026 shares to 16,588,140 shares
Sprint Nextel (NYSE: S) lowered from 72,475,900 shares to 26,178,549 shares
WellPoint, Inc. (NYSE: WLP) lowered from 1,930,689 shares to 958,173 shares

Liquidated Stakes
Best Buy Co., Inc. (NYSE: BBY) liquidated
CareFusion Corporation (NYSE: CFN) liquidated
Compuware Corp (NASDAQ: CPWR) liquidated
EXPEDIA (NASDAQ: EXPE) liquidated
Hess Corp. (NYSE: HES) liquidated
Microsoft Corp (NASDAQ: MSFT) (CALL) liquidated
UnitedHealth Group, Inc. (NYSE: UNH) liquidated

Maintained Stakes
Aspen Insurance Holdings Ltd. (NYSE: AHL) maintained 4,039,600 share stake
Barrick Gold Corp. (NYSE: ABX) maintained 1,967,500 share stake
CBS (NYSE: CBS) maintained 4,328,681 share stake
Chipotle Mexican Grill (NYSE: CMG) (PUT) maintained 50,000 share stake
Einstein Noah Restaurant Group, Inc. (NASDAQ: BAGL) maintained 10,733,469 share stake
FIFTH ST FINANCE (NASDAQ: FSC) maintained 1,998,692 share stake
Genworth Financial Inc. Cl A (NYSE: GNW) maintained 658,700 share stake
Legg Mason, Inc. (NYSE: LM) maintained 3,368,900 share stake
LIBERTY MEDIA-CAP-A (NASDAQ: LMCA) maintained 971,700 share stake
Market Vectors ETF Trust Market Vectors Gold Miners (NYSE: GDX) maintained 6,004,971 share stake
Microsoft Corp (NASDAQ: MSFT) maintained 7,662,895 share stake
NCR Corp. (NYSE: NCR) maintained 8,269,790 share stake
NVR, Inc. (NYSE: NVR) maintained 64,050 share stake
Oaktree Capital Group LLC (NYSE: OAK) maintained 1,851,812 share stake
Republic Airways Holding, Inc. (NASDAQ: RJET) maintained 3,412,800 share stake
STATE BK FINL (NASDAQ: STBZ) maintained 2,100,000 share stake
Symmetricom, Inc. (NASDAQ: SYMM) maintained 1,709,846 share stake
Tessera Technologies, Inc. (NASDAQ: TSRA) maintained 695,580 share stake
Virgin Media, Inc. (NASDAQ: VMED) maintained 4,920,000 share stake
Xerox Corp. (NYSE: XRX) maintained 25,997,417 share stake

* Since the original filing these positions have been updated further.

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