David C. Parke

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-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

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 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

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-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

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 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

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 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-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

Mufson Howe Hunter & Co. LLC provides investment advice. It focuses on middle market companies seeking growth capital and liquidity through recapitalizations, mergers & acquisitions and private placements. The firm provides sell-side advisory, buy-side assignments, recapitalizations, private placements of growth capital, financial advisory services and valuations services to the business services, cleantech, consumer and retail, life science tools and services, specialty distribution and manufacturing and technology industries. The company was founded by Michael J. Mufson, Anthony Lopez-Ona and Michael J. Howe in 2004 and is headquartered in Philadelphia, PA.

Evolution Life Science Partners is a life science investment bank that specializes in licensing, strategic advisory, M&A, and capital raising. The private company is based in San Francisco, CA. The CEOs are Anton G. Gueth, David C. Parke. The company was founded by Mary C. Tanner.

Mufson Howe Hunter & Co. LLC provides investment advice. It focuses on middle market companies seeking growth capital and liquidity through recapitalizations, mergers & acquisitions and private placements. The firm provides sell-side advisory, buy-side assignments, recapitalizations, private placements of growth capital, financial advisory services and valuations services to the business services, cleantech, consumer and retail, life science tools and services, specialty distribution and manufacturing and technology industries. The company was founded by Michael J. Mufson, Anthony Lopez-Ona and Michael J. Howe in 2004 and is headquartered in Philadelphia, PA.

Mufson Howe Hunter & Co. LLC provides investment advice. It focuses on middle market companies seeking growth capital and liquidity through recapitalizations, mergers & acquisitions and private placements. The firm provides sell-side advisory, buy-side assignments, recapitalizations, private placements of growth capital, financial advisory services and valuations services to the business services, cleantech, consumer and retail, life science tools and services, specialty distribution and manufacturing and technology industries. The company was founded by Michael J. Mufson, Anthony Lopez-Ona and Michael J. Howe in 2004 and is headquartered in Philadelphia, PA.

Evolution Life Science Partners is a life science investment bank that specializes in licensing, strategic advisory, M&A, and capital raising. The private company is based in San Francisco, CA. The CEOs are Anton G. Gueth, David C. Parke. The company was founded by Mary C. Tanner.

Evolution Life Science Partners is a life science investment bank that specializes in licensing, strategic advisory, M&A, and capital raising. The private company is based in San Francisco, CA. The CEOs are Anton G. Gueth, David C. Parke. The company was founded by Mary C. Tanner.