NEW YORK, Oct. 25, 2012 /PRNewswire/ -- Carrizo Oil & Gas Inc. (NASD: CRZO) will replace Overseas Shipholding Group, Inc. (NYSE: OSG) in the S&P SmallCap 600 index after the close of trading on Monday, October 29. Overseas Shipholding has stated that certain of its previously issued financial statements should no longer be relied upon, and the company is exploring strategic options including a bankruptcy filing. Therefore, it is no longer appropriate for the S&P SmallCap 600 index.

Carrizo Oil & Gas engages in the exploration, development, and production of oil and gas. Headquartered in Houston, TX, the company will be added to the S&P SmallCap 600 GICS (Global Industry Classification Standard) Oil & Gas Exploration & Production Sub-Industry index.

Following is a summary of the change:

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