Harvey M. Havlichek

PDC 2003-C LP explores oil and natural gas properties. It has drilled 22 wells in Wattenberg and 5 in Grand Valley fields. The company was founded on September 26, 2003 and is headquartered in Denver, CO.

PDC 2005-A Limited Partnership was organized as a limited partnership, in accordance with the laws of the State of West Virginia for the purpose of engaging in the exploration and development of oil and natural gas properties. Business operations of the Partnership commenced upon closing of an offering for the sale of Partnership units. Upon funding, the Partnership entered into a Drilling and Operating Agreement ('D&O Agreement') with the Managing General Partner which authorizes Petroleum Development Corporation ('PDC') to conduct and manage the Partnership's business. Upon completion of the drilling phase of the Partnership's wells, all additional general partners units were converted into units of limited partner interests and thereafter became limited partners of the Partnership. In accordance with the terms of the Limited Partnership Agreement, the Managing General Partner manages all activities of the Partnership and acts as the intermediary for substantially all Partnership transactions.

PDC 2005-B Limited Partnership was organized as a limited partnership, in accordance with the laws of the State of West Virginia for the purpose of engaging in the exploration and development of oil and natural gas properties. Business operations of the Partnership commenced upon closing of an offering for the sale of Partnership units. Upon funding, the Partnership entered into a Drilling and Operating Agreement with the Managing General Partner which authorizes Petroleum Development Corporation ('PDC') to conduct and manage the Partnership's business. Upon completion of the drilling phase of the Partnership's wells, all additional general partners units were converted into units of limited partner interests and thereafter became limited partners of the Partnership. In accordance with the terms of the Limited Partnership Agreement, the Managing General Partner manages all activities of the Partnership and acts as the intermediary for substantially all Partnership transactions

Arthur Andersen LLP used to provide accounting services. It was also into consulting services for clients that operate businesses throughout the United States and around the world. Arthur Andersen was founded in 1913 and was headquartered in Chicago, IL.

Hayden Harper, Inc. provides investment advice. The company was founded in October 2002 and is headquartered in Charlotte, NC.

The Huntington National Bank engages in the provision of personal and business banking services to individuals and families, small and middle market businesses, and not-for-profit businesses. Its services include online and mobile banking, borrowing, investments, insurance, planning, and security services. The company was founded in 1866 and is headquartered in Columbus, OH.

BillGo, Inc. develops mobile payments application. It enables users to connect, pay, and manage any bill including rent. The company was founded by Daniel W. Holt, Scott M. Miller, and Kelly Seidl and is headquartered in Fort Collins, CO.

Part of Flushing Financial Corp., Empire National Bank is a nationally chartered commercial bank. The company is based in Islandia, NY.

West Virginia Bankers Association, Inc. provides trade associations and financial services. It offers variety of classes, seminars, schools, and conferences. The company was founded in 1891 and is headquartered in Charleston, VA.

The American Institute of Certified Public Accountants provides vocational education in accounting. The company provides services to the accounting community, regulatory bodies, and other organizations. It also operates in Jersey City, Washington, and Lewisville. It was founded in 1887 and is headquartered in New York City, NY.

Part of Energy Services of America Corp., Ryan Environmental Transport LLC provides haulage services for oil and gas. The company is based in Bridgeport, WV.

Ryan Environmental LLC provides environmental remediation services. Its services include environmental consulting, remediation, cleaning services, emergency spill response, hydrocarbon lab services, corrosion services, well services, general roustabout, and both steel and poly pipeline construction. The company was founded in 1977 and is headquartered in Bridgeport, WV.

Cava & Banko PLLC engages in the provision of public accounting and consulting services. It offers personal financial and estate planning, elder care, small business accounting, quickbooks services, payroll, audit reviews, bank financing, business valuation, strategic business planning, succession planning, business formation, litigation supports, human resources services, and tax planning and preparation. The company is headquartered in Bridgeport, WV.

Friedman & Fuller PC provides CPA services. The private company is based in Rockville, MD.

Flint Hill School operates as an independent, coeducational, college-preparatory day school for grades TK-12. The company was founded by Don Niklason in 1956 and is headquartered in Oakton, VA.