0001193125-13-149740 Sample Contracts

MAGNUM HUNTER RESOURCES CORPORATION Suite 650 Houston, Texas 77056 April 8, 2013

Stock Purchase Agreement • April 11th, 2013 • Penn Virginia Corp • Crude petroleum & natural gas

• Contract Type
  Stock Purchase Agreement
• Filed
  April 11th, 2013
• Company
  Penn Virginia Corp
• Industry
  Crude petroleum & natural gas

This letter constitutes a legally binding amendment (this “Amendment”) to the Stock Purchase Agreement dated April 2, 2013 (the “Agreement”) among Magnum Hunter Resources Corporation (“MHR”), Penn Virginia Oil & Gas Corporation (“PVO&G”) and Penn Virginia Corporation (“PVA”). More specifically, MHR, PVO&G and PVA do hereby agree as follows:

GUARANTY

Guaranty • April 11th, 2013 • Penn Virginia Corp • Crude petroleum & natural gas • Texas

• Contract Type
  Guaranty
• Filed
  April 11th, 2013
• Company
  Penn Virginia Corp
• Industry
  Crude petroleum & natural gas
• Jurisdiction
  Texas

This Guaranty (this “Guaranty”) dated as of April 2, 2013, is made by PENN VIRGINIA CORPORATION, a Virginia corporation (“Guarantor”), in favor of MAGNUM HUNTER RESOURCES CORPORATION, a Delaware corporation (“Seller”).