Carrizo Oil & Gas Inc.

Carrizo Oil & Gas, Inc. is a Houston based independent energy company engaged in the exploration, development and production of natural gas and oil.  Our current operations are focused in the Barnett Shale area in North Texas, in the Marcellus Shale of Appalachia, along the onshore Gulf Coast in Texas and Louisiana, and in the U.K. North Sea where two significant Carrizo generated discoveries were made in the 2nd quarter of 2007. We have grown our production and reserves through 3-D seismic driven exploration and development drilling programs.  From our inception through December 31, 2009, we have participated in the drilling of 786 (392.8 net) wells with a success rate of 73% in our onshore Gulf Coast area and 100% in the Barnett Shale.