EXHIBIT 4.2.1 SIXTH SUPPLEMENTAL INDENTURE TO INDENTURE DATED MARCH 15, 1997 (8 1/2% SECURITIES) SIXTH SUPPLEMENTAL INDENTURE dated as of December 31, 1999, among CHESAPEAKE ENERGY CORPORATION, an Oklahoma corporation (the "Company"), the SUBSIDIARY...Chesapeake Energy Corp • October 26th, 2001 • Crude petroleum & natural gas • New York
and the Subsidiary Guarantors named herein 8 1/2% SENIOR NOTES DUE 2012 ---------------------------------------- EIGHTH SUPPLEMENTAL INDENTURE DATED AS OF October 1, 2001Supplemental Indenture • October 26th, 2001 • Chesapeake Energy Corp • Crude petroleum & natural gas • New York
ARTICLE I DEFINITIONSChesapeake Energy Corp • October 26th, 2001 • Crude petroleum & natural gas • New York
WITNESSETH:Employment Agreement • October 26th, 2001 • Chesapeake Energy Corp • Crude petroleum & natural gas • Oklahoma
and the Subsidiary Guarantors named herein 8 1/8% SENIOR NOTES DUE 2011Chesapeake Energy Corp • October 26th, 2001 • Crude petroleum & natural gas • New York
EXHIBIT 4.1.1 SIXTH SUPPLEMENTAL INDENTURE TO INDENTURE DATED MARCH 15, 1997 (7 7/8% SECURITIES) SIXTH SUPPLEMENTAL INDENTURE dated as of December 31, 1999, among CHESAPEAKE ENERGY CORPORATION, an Oklahoma corporation (the "Company"), the SUBSIDIARY...Chesapeake Energy Corp • October 26th, 2001 • Crude petroleum & natural gas • New York
October 5, 2001 Chesapeake Energy Corporation Chesapeake Exploration Limited Partnership 6100 North Western Avenue Oklahoma City, Oklahoma 73118 Re: Second Amended and Restated Credit Agreement dated as of June 11, 2001 (as amended, supplemented or...Chesapeake Energy Corp • October 26th, 2001 • Crude petroleum & natural gas
September 10, 2001 Chesapeake Energy Corporation Chesapeake Exploration Limited Partnership 6100 North Western Avenue Oklahoma City, Oklahoma 73118 Re: Second Amended and Restated Credit Agreement dated as of June 11, 2001 (as amended, supplemented or...Chesapeake Energy Corp • October 26th, 2001 • Crude petroleum & natural gas
