Mark A. Mccollum serves as Executive at HALLIBURTON CO, where they oversee executive responsibilities. Since joining the company, Mark A. Mccollum has executed 126 insider transactions totaling $15.5M, demonstrating a bearish approach to their equity position. Their most recent transaction on Jan 23, 2026 involved receiving (via award) 727 shares valued at $56.7K.
Mark A. Mccollum currently holds 727 shares of HALLIBURTON CO (HAL), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Mark A. Mccollum has been a net seller of HAL stock. They have purchased $0 and sold $15.5M worth of shares.
Mark A. Mccollum's most recent insider trade was on Jan 23, 2026, when they sold 727 shares at $78.00 per share.
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| $N/A |
| Discretionary |
| Aug 11, 2024 | WLK | $0 | Option Exercise | 1,136 | $N/A | Discretionary |
| Mar 1, 2024 | MRO | $0 | Award | 8,130 | $N/A | Discretionary |
| Aug 12, 2023 | WLK | $0 | Option Exercise | 1,446 | $N/A | Discretionary |
| Mar 1, 2023 | MRO | $0 | Award | 7,754 | $N/A | Discretionary |
| Dec 1, 2022 | MRO | $0 | Award | 415 | $N/A | Discretionary |
| Aug 13, 2022 | WLK | $0 | Option Exercise | 1,763 | $N/A | Discretionary |
| Mar 3, 2022 | WLK | $0 | Gift | 3,000 | $N/A | Discretionary |
| Aug 14, 2021 | WLK | $0 | Option Exercise | 2,400 | $N/A | Discretionary |
| Aug 16, 2020 | WLK | $0 | Option Exercise | 2,387 | $N/A | Discretionary |
| Dec 13, 2019 | NONE | $0 | Award | 1,741 | $N/A | Discretionary |
| Dec 13, 2019 | NONE | $0 | Disposition | 2,511,573 | $N/A | Discretionary |
| Dec 13, 2019 | NONE | $16.2K | Payment | 809,498 | $0.02 | Discretionary |
| Dec 13, 2019 | NONE | $41.1K | Award | 2,057,174 | $0.02 | Discretionary |
| Dec 13, 2019 | NONE | $8.0K | Payment | 401,718 | $0.02 | Discretionary |
| Aug 17, 2019 | WLK | $0 | Option Exercise | 1,409 | $N/A | Discretionary |
| May 18, 2019 | WLK | $0 | Option Exercise | 987 | $N/A | Discretionary |
| Apr 24, 2019 | WFT | $34.0K | Payment | 53,954 | $0.63 | Discretionary |
| Apr 24, 2019 | WFT | $45.3K | Payment | 71,938 | $0.63 | Discretionary |
| Jan 31, 2019 | WFT | $46.9K | Payment | 73,253 | $0.64 | Discretionary |
| Apr 26, 2018 | AROC | $0 | Award | 2,800 | $N/A | Discretionary |
| Apr 24, 2018 | WFT | $201.8K | Payment | 77,903 | $2.59 | Discretionary |
| Mar 2, 2018 | AROC | $0 | Award | 13,158 | $N/A | Discretionary |
| Jan 31, 2018 | WFT | $0 | Award | 845,771 | $N/A | Discretionary |
| Apr 24, 2017 | WFT | $0 | Award | 1,096,892 | $N/A | Discretionary |
| Mar 3, 2017 | AROC | $0 | Award | 9,125 | $N/A | Discretionary |
| Feb 27, 2017 | HAL | $639.6K | Sale | 12,000 | $53.30 | Discretionary |
| Feb 27, 2017 | HAL | $442.8K | Option Exercise | 12,000 | $36.90 | Discretionary |
| Feb 27, 2017 | HAL | $1.2M | Option Exercise | 33,200 | $35.57 | Discretionary |