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John Mollenkopf
Director/Board Member at
ANTERO MIDSTREAM CORPORATION
Net worth: 2 M $ as of 2026-05-30
Profile
Mr. John C. Mollenkopf is an Independent Director at Antero Midstream Corp., a Chief Operating Officer & Senior Vice President at MarkWest Energy GP LLC and a Chief Operating Officer at MarkWest Hydrocarbon LLC. He is on the Board of Directors at Antero Midstream Corp. Mr. Mollenkopf was previously employed as a Chief Operating Officer & Executive Vice President by MPLX GP LLC, a Chief Operating Officer & Executive Vice President by MPLX LP, a Chief Operating Officer & Executive Vice President by MarkWest Energy Partners LP, and a Principal by Arco Oil & Gas Co. He also served on the board at Antero Midstream Partners LP. He received his undergraduate degree from the University of Colorado Boulder.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
| 2026-04-12 | 104,659 ( 0.02% ) | 2 M $ | 2026-05-30 |
John Mollenkopf active positions
| Companies | Position | Start |
|---|---|---|
| ANTERO MIDSTREAM CORPORATION | Director/Board Member | 2019-02-28 |
Former positions of John Mollenkopf
| Companies | Position | End |
|---|---|---|
| ANTERO MIDSTREAM PARTNERS LP | Director/Board Member | 2019-03-11 |
| MPLX LP | Chief Operating Officer | 2016-09-30 |
MPLX GP LLC
 MPLX GP LLC Oil & Gas PipelinesIndustrial Services Owns, operates, develops and acquires pipelines for petroleum and energy industries | Chief Operating Officer | 2016-09-30 |
| MARKWEST ENERGY PARTNERS LP | Chief Operating Officer | 2015-12-03 |
MarkWest Energy GP LLC
 MarkWest Energy GP LLC Oilfield Services/EquipmentIndustrial Services Oil And Gas Field Services Not Elsewhere Classified | Founder | 2014-12-31 |
Training of John Mollenkopf
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
45
1st degree connections
9
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 9 |
|---|---|
MarkWest Hydrocarbon LLC
 MarkWest Hydrocarbon LLC Oilfield Services/EquipmentIndustrial Services Provides natural gas processing services | Industrial Services |
MarkWest Energy Partners LP
 MarkWest Energy Partners LP Integrated OilEnergy Minerals Owns and operates natural gas midstream service businesses & provides related distribution services | Energy Minerals |
Antero Midstream Partners LP
 Antero Midstream Partners LP Oil & Gas PipelinesIndustrial Services Operates and develops midstream gathering, compression, processing and fractionation assets | Industrial Services |
MarkWest Energy GP LLC
MarkWest Energy GP LLC Oilfield Services/EquipmentIndustrial Services Oil And Gas Field Services Not Elsewhere Classified | Industrial Services |
Arco Oil & Gas Co.
 Arco Oil & Gas Co. Oil & Gas ProductionEnergy Minerals Provides oil and gas exploration & production services | Energy Minerals |
MPLX LP
 MPLX LP Oil & Gas PipelinesIndustrial Services Owns, operates, develops and acquires pipelines and other midstream assets | Industrial Services |
MPLX GP LLC
MPLX GP LLC Oil & Gas PipelinesIndustrial Services Owns, operates, develops and acquires pipelines for petroleum and energy industries | Industrial Services |
University of Colorado Boulder
 University of Colorado Boulder Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Antero Midstream Corp.
 Antero Midstream Corp. Oil & Gas PipelinesIndustrial Services Provides natural gas transmission and water supply & treatment services | Industrial Services |
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