David M. Demshur serves as Executive at CORE LABORATORIES N V, where they oversee executive responsibilities. Since joining the company, David M. Demshur has executed 327 insider transactions totaling $86.3M, demonstrating a bearish approach to their equity position. Their most recent transaction on Dec 31, 2019 involved selling 19,274 shares valued at $726.1K.
David M. Demshur currently holds 365,844 shares of CORE LABORATORIES N V (CLB), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, David M. Demshur has been a net seller of CLB stock. They have purchased $0 and sold $86.3M worth of shares.
David M. Demshur's most recent insider trade was on Dec 31, 2019, when they sold 19,274 shares at $37.67 per share.
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| $N/A |
| Discretionary |
| Dec 31, 2018 | CLB | $0 | Option Exercise | 52,995 | $N/A | Discretionary |
| Dec 31, 2018 | CLB | $1.1M | Payment | 18,340 | $59.66 | Discretionary |
| Dec 29, 2017 | CLB | $1.9M | Payment | 17,202 | $109.55 | Discretionary |
| Dec 29, 2017 | CLB | $0 | Option Exercise | 44,085 | $N/A | Discretionary |
| Dec 30, 2016 | CLB | $1.0M | Payment | 8,368 | $120.04 | Discretionary |
| Dec 30, 2016 | CLB | $0 | Option Exercise | 19,946 | $N/A | Discretionary |
| Dec 31, 2015 | CLB | $1.2M | Payment | 10,919 | $108.74 | Discretionary |
| Dec 31, 2015 | CLB | $0 | Option Exercise | 29,218 | $N/A | Discretionary |
| Dec 31, 2014 | CLB | $0 | Option Exercise | 29,835 | $N/A | Discretionary |
| Dec 31, 2014 | CLB | $0 | Payment | 12,516 | $N/A | Discretionary |
| Dec 31, 2014 | CLB | $1.5M | Payment | 12,516 | $120.34 | Discretionary |
| Dec 31, 2013 | CLB | $2.5M | Payment | 12,852 | $190.95 | Discretionary |
| Dec 31, 2013 | CLB | $0 | Option Exercise | 30,635 | $N/A | Discretionary |
| Dec 31, 2012 | CLB | $0 | Option Exercise | 27,600 | $N/A | Discretionary |
| Dec 31, 2012 | CLB | $1.1M | Payment | 10,061 | $109.31 | Discretionary |
| Jul 27, 2011 | CLB | $962.4K | Sale | 8,810 | $109.24 | Discretionary |
| Jul 27, 2011 | CLB | $2.2M | Sale | 19,974 | $108.51 | Discretionary |
| Jul 27, 2011 | CLB | $1.1M | Sale | 10,536 | $107.40 | Discretionary |
| Jul 27, 2011 | CLB | $279.1K | Sale | 2,610 | $106.93 | Discretionary |
| Jul 27, 2011 | CLB | $110.2K | Sale | 1,000 | $110.17 | Discretionary |
| Jul 26, 2011 | CLB | $11.9M | Sale | 109,314 | $109.25 | Discretionary |
| Jul 26, 2011 | CLB | $2.0M | Sale | 18,000 | $108.77 | Discretionary |
| Jul 26, 2011 | CLB | $55.0K | Sale | 500 | $110.03 | Discretionary |
| Jul 25, 2011 | CLB | $1.6M | Sale | 14,826 | $111.17 | Discretionary |
| Jul 25, 2011 | CLB | $1.6M | Sale | 14,430 | $110.79 | Discretionary |
| Jul 30, 2010 | CLB | $1.4M | Sale | 17,791 | $76.18 | Discretionary |
| Jul 30, 2010 | CLB | $1.4M | Sale | 18,950 | $75.73 | Discretionary |
| Jul 29, 2010 | CLB | $23.1K | Sale | 300 | $77.00 | Discretionary |