Daniel W. Cook

Centex Corp. engages in the construction and selling of detached and attached single-family homes. The firm provides designing, mortgage, commerce title and insurance services. The company was founded in 1950 and is headquartered in Dallas, Texas.

Ameritrade Holding Corp. develops and provides innovative brokerage products and services tailored to meet the varying investing and portfolio management needs of individual investors and institutional distribution partners. The company is headquartered in Omaha, NE.

Dallas-based Centex Corporation (NYSE: CTX), founded in 1950, is a home building company. Centex Homes operates in major U.S. markets in 25 states and delivered more than 33,000 homes in the United States in its most recent fiscal year ended March 31, 2005. Its leading brands include Centex Homes, Fox & Jacobs Homes and Centex Destination Properties. The company, which handles commercial construction chores for parent Centex Corporation, offers start-to-finish project management and construction services, including site evaluation and analysis, general contracting, cost consulting, process equipment installation, turnkey medical facility development, capital equipment planning, and closeout services. Typical projects include such facilities as hotels, office buildings, civic centers, airports, hospitals, industrial facilities, schools, public buildings, and retail locations.

TD Ameritrade Holding Corp. engages in the provision of securities brokerage services and related technology-based financial services. It offers the following products and services to retail clients: touch-tone trading, trading over the internet, unlimited streaming, free real-time quotes, extended trading hours, direct access to market destinations and commitment ton the speed of order execution. The company was founded by John Joe Ricketts in 1971 and is headquartered in Omaha, NE.

Leopard Acquisition Corp. is a blank check company. It is seeking to acquire control of a business in the United States or Europe, without limit to a particular industry. The company will liquidate if it has not initiated a business combination within 24 months of its public offering. Leopard Acquisition was organized in January 2008 and is located in Wilson, WY

Dallas Museum of Art collects, preserves, presents, and interprets works of art of the highest quality from diverse cultures and many centuries, including that of its own time. The firm champions the power of art, embracing its responsibility to engage and educate its community, to contribute to cultural knowledge, and to advance creative endeavor. The firm was founded in 1903 and is located in Dallas, TX.

National Review Online creates and publishes periodicals, magazines and trade journals. It also offers story books such as The National Review Treasury of Classic Bedtime and Choosing the Right College. The company was founded by William F. Buckley in 1955 and is headquartered in New York, NY.