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John Christmann
Chief Executive Officer at
APA CORPORATION
Net worth: 32 M $ as of 2026-05-30
Profile
John J. Christmann occupies the position of President, Chief Executive Officer & Director at APA Corp. and President & Chief Executive Officer for Apache Corp. (a subsidiary of APA Corp.). Mr. Christmann is also President & Chief Executive Officer for Apache Corp. and Member-Petroleum Engineering Academy at Texas Tech University. In the past Mr. Christmann was Principal at Vastar Resources, Inc. and Principal at Arco Oil & Gas Co. John J. Christmann received an undergraduate degree from Colorado School of Mines and an MBA from Southern Methodist University.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
APA CORPORATION 0.25% | 2026-02-27 | 884,568 ( 0.25% ) | 32 M $ | 2026-05-30 |
John Christmann active positions
| Companies | Position | Start |
|---|---|---|
| APA CORPORATION | Chief Executive Officer | 2015-01-19 |
Apache Corp.
 Apache Corp. Oil & Gas ProductionEnergy Minerals Engages in oil and gas exploration & production | Chief Executive Officer | 2015-01-19 |
Texas Tech University
 Texas Tech University Other Consumer ServicesConsumer Services Functions as a College/University | Corporate Officer/Principal | - |
Apache Offshore Investment Partnership
 Apache Offshore Investment Partnership Integrated OilEnergy Minerals Engages in exploration of oil and gas properties | Chief Executive Officer | - |
Callon (Permian) LLC
 Callon (Permian) LLC Oil & Gas ProductionEnergy Minerals Explores and produces natural gas and oil | Chief Executive Officer | - |
Cordillera Energy Partners III LLC
 Cordillera Energy Partners III LLC Oil & Gas ProductionEnergy Minerals Engages in acquisition, exploration, and production of oil and gas properties | Chief Executive Officer | - |
Former positions of John Christmann
| Companies | Position | End |
|---|---|---|
Arco Oil & Gas Co.
 Arco Oil & Gas Co. Oil & Gas ProductionEnergy Minerals Provides oil and gas exploration & production services | Corporate Officer/Principal | - |
| CALLON PETROLEUM COMPANY | Chief Executive Officer | - |
Vastar Resources, Inc.
 Vastar Resources, Inc. Oil & Gas ProductionEnergy Minerals Explores, develops, and produces gas and liquid hydrocarbons | Corporate Officer/Principal | - |
Training of John Christmann
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
65
1st degree connections
11
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 11 |
|---|---|
Apache Corp.
Apache Corp. Oil & Gas ProductionEnergy Minerals Engages in oil and gas exploration & production | Energy Minerals |
Apache Offshore Investment Partnership
Apache Offshore Investment Partnership Integrated OilEnergy Minerals Engages in exploration of oil and gas properties | Energy Minerals |
Vastar Resources, Inc.
Vastar Resources, Inc. Oil & Gas ProductionEnergy Minerals Explores, develops, and produces gas and liquid hydrocarbons | Energy Minerals |
Callon Petroleum Co.
 Callon Petroleum Co. Integrated OilEnergy Minerals Engages in exploration, development, acquisition and production of oil and natural gas properties | Energy Minerals |
Southern Methodist University
 Southern Methodist University Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Colorado School of Mines
 Colorado School of Mines Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Texas Tech University
Texas Tech University Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Arco Oil & Gas Co.
Arco Oil & Gas Co. Oil & Gas ProductionEnergy Minerals Provides oil and gas exploration & production services | Energy Minerals |
Cordillera Energy Partners III LLC
Cordillera Energy Partners III LLC Oil & Gas ProductionEnergy Minerals Engages in acquisition, exploration, and production of oil and gas properties | Energy Minerals |
Callon (Permian) LLC
Callon (Permian) LLC Oil & Gas ProductionEnergy Minerals Explores and produces natural gas and oil | Energy Minerals |
APA Corp.
 APA Corp. Integrated OilEnergy Minerals Engages in exploration of crude oil, natural gas and related liquids | Energy Minerals |
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