John C. Mollenkopf serves as Executive at MARKWEST ENERGY PARTNERS L P, where they oversee executive responsibilities. Since joining the company, John C. Mollenkopf has executed 89 insider transactions totaling $3.8M, demonstrating a bearish approach to their equity position. Their most recent transaction on Jan 10, 2026 involved receiving (via award) 2,058 shares valued at $0.
John C. Mollenkopf currently holds 103,042 shares of MARKWEST ENERGY PARTNERS L P (MWE), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, John C. Mollenkopf has been a net seller of MWE stock. They have purchased $0 and sold $3.8M worth of shares.
John C. Mollenkopf's most recent insider trade was on Jan 10, 2026, when they sold 2,058 shares at $0.00 per share.
Get notified when new Form 4 filings are submitted
| $N/A |
| Discretionary |
| Jul 10, 2025 | AM | $0 | Award | 2,042 | $N/A | Discretionary |
| Jul 10, 2024 | AM | $0 | Award | 2,415 | $N/A | Discretionary |
| Apr 10, 2024 | AM | $0 | Award | 2,517 | $N/A | Discretionary |
| Jan 10, 2024 | AM | $0 | Award | 2.9 | $N/A | Discretionary |
| Oct 10, 2023 | AM | $0 | Award | 2,915 | $N/A | Discretionary |
| Jul 10, 2023 | AM | $0 | Award | 3,095 | $N/A | Discretionary |
| Apr 10, 2023 | AM | $0 | Award | 3,098 | $N/A | Discretionary |
| Jan 10, 2023 | AM | $0 | Award | 2,925 | $N/A | Discretionary |
| Oct 10, 2022 | AM | $0 | Award | 3,371 | $N/A | Discretionary |
| Jul 8, 2022 | AM | $0 | Award | 3,490 | $N/A | Discretionary |
| Apr 8, 2022 | AM | $0 | Award | 2,981 | $N/A | Discretionary |
| Jan 10, 2022 | AM | $0 | Award | 3,205 | $N/A | Discretionary |
| Oct 10, 2021 | AM | $0 | Award | 2,962 | $N/A | Discretionary |
| Jul 9, 2021 | AM | $0 | Award | 3,074 | $N/A | Discretionary |
| Apr 12, 2021 | AM | $0 | Award | 3,911 | $N/A | Discretionary |
| Jan 10, 2021 | AM | $0 | Award | 4,022 | $N/A | Discretionary |
| Oct 10, 2020 | AM | $0 | Award | 5,481 | $N/A | Discretionary |
| Jul 10, 2020 | AM | $0 | Award | 12,126 | $N/A | Discretionary |
| Jan 10, 2020 | AM | $0 | Award | 4,623 | $N/A | Discretionary |
| Oct 10, 2019 | AM | $0 | Award | 4,514 | $N/A | Discretionary |
| Jul 10, 2019 | AM | $0 | Award | 2,688 | $N/A | Discretionary |
| Apr 10, 2019 | AM | $0 | Award | 2,365 | $N/A | Discretionary |
| Mar 12, 2019 | AM | $0 | Disposition | 6,065 | $N/A | Discretionary |
| Mar 12, 2019 | AM | $0 | Award | 11,478 | $N/A | Discretionary |
| Jan 2, 2019 | AM | $0 | Award | 1,137 | $N/A | Discretionary |
| Oct 10, 2018 | AM | $0 | Award | 735 | $N/A | Discretionary |
| Jul 10, 2018 | AM | $0 | Award | 824 | $N/A | Discretionary |
| Apr 10, 2018 | AM | $0 | Award | 1,002 | $N/A | Discretionary |