What did Warren Buffett buy during the second quarter? To our surprise, he did not buy any banks or other financials. He might have bought ConocoPhillips, but he keeps the information confidential. This is what we know about Berkshire's buys and sells during the second quarter.

Warren Buffett buys NRG Energy Inc. during the 3-months ended 06/30/2008, according to the most recent filings of his investment company, Berkshire Hathaway. Warren Buffett owns 38 stocks with a total value of $57.9 billion. These are the details of the buys and sells.

• New Purchases: NRG,
• Added Positions: IR, SNY,
• Reduced Positions: BUD,

For the details of Warren Buffett's stock buys and sells, go to http://www.gurufocus.com/StockBuy.php?GuruName=Warren+Buffett

Added: IngersollRand Company Ltd. (IR)

Warren Buffett added to his holdings in IngersollRand Company Ltd. by 501.82%. His purchase prices were between $36.7 and $46.18, with an estimated average price of $42.6. The impact to his portfolio due to this purchase was 0.3%. His holdings were 5,636,600 shares as of 06/30/2008.

Ingersoll Rand Company is one of the leading providers of security and safety climate control industrial productivity and infrastructure products. In each of these markets the company offers a diverse productportfolio that includes well-recognized industrial and commercial brands. IngersollRand Company Ltd. has a market cap of $12.55 billion; its shares were traded at around $39.06 with a P/E ratio of 3.47 and P/S ratio of 1.27. The dividend yield of IngersollRand Company Ltd. stocks is 2%.

Added: SanofiAventis (SNY)

Warren Buffett added to his holdings in SanofiAventis by 8.84%. His purchase prices were between $32.32 and $38.04, with an estimated average price of $35.9. The impact to his portfolio due to this purchase was 0.02%. His holdings were 3,903,933 shares as of 06/30/2008.

Sanofi-Synth?labo is a leading global pharmaceutical company. SanofiAventis has a market cap of $94 billion; its shares were traded at around $36.02 with a P/E ratio of 13.05 and P/S ratio of 2.19. The dividend yield of SanofiAventis stocks is 3.1%.

New Purchase: NRG Energy Inc. (NRG)

Warren Buffett initiated holdings in NRG Energy Inc. His purchase prices were between $40 and $44.43, with an estimated average price of $42.4. The impact to his portfolio due to this purchase was 0.24%. His holdings were 3,238,100 shares as of 06/30/2008.

NRG Energy Inc owns and operates a diverse portfolio of power-generating facilities primarily in the United States. Its operations include baseload intermediate peaking and cogeneration facilities thermal energy production and energy resource recovery facilities. NRG Energy Inc. has a market cap of $8.31 billion; its shares were traded at around $35.82 with a P/E ratio of 17.67 and P/S ratio of 1.46.

Reduced: AnheuserBusch Companies Inc. (BUD)

Warren Buffett reduced to his holdings in AnheuserBusch Companies Inc. by 61.07%. His sale prices were between $46.6 and $61.92, with an estimated average price of $53.5. The impact to his portfolio due to this sale was -0.91%. Warren Buffett still held 13,845,000 shares as of 06/30/2008.

Anheuser-Busch Companies is the holding company parent of Anheuser-BuschIncorporated and to a number of subsidiaries that conduct variousother business operations. The company's operations are comprised of thefollowing business segments: domestic beer international beer entertainment packaging such as aluminum beverage container recycling malt production rice milling real estate development turf farming metalized paper label printing and transportation services. AnheuserBusch Companies Inc. has a market cap of $48.91 billion; its shares were traded at around $68 with a P/E ratio of 23.57 and P/S ratio of 2.85. The dividend yield of AnheuserBusch Companies Inc. stocks is 2.2%.

Buy or Sell? ConocoPhillips (COP)

Warren Buffett keeps his portfolio about ConocoPhillips confidential. The filings says: "Confidential information has been omitted from the Form 13F and filed separately with the Commission. Included in the confidential filing is information regarding Berkshire Hathaway's position in ConocoPhillips. At March 31, 2008, shares held in ConocoPhillips were included in Berkshire Hathaway's public Form 13F."

ConocoPhillips is a major international integrated energy company with operations in some 49 countries. ConocoPhillips has a market cap of $120.63 billion; its shares were traded at around $82.37 with a P/E ratio of 7.20 and P/S ratio of 0.60. The dividend yield of ConocoPhillips stocks is 2.3%.

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