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 Feb 22, 2007 involved selling 300 shares valued at $23.8K.
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 Feb 22, 2007, when they sold 300 shares at $79.34 per share.
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| $79.35 |
| Discretionary |
| Feb 22, 2007 | CLB | $39.7K | Sale | 500 | $79.36 | Discretionary |
| Feb 22, 2007 | CLB | $15.9K | Sale | 200 | $79.37 | Discretionary |
| Feb 22, 2007 | CLB | $63.5K | Sale | 800 | $79.39 | Discretionary |
| Feb 22, 2007 | CLB | $190.6K | Sale | 2,400 | $79.40 | Discretionary |
| Feb 22, 2007 | CLB | $79.4K | Sale | 1,000 | $79.41 | Discretionary |
| Feb 22, 2007 | CLB | $23.8K | Sale | 300 | $79.42 | Discretionary |
| Feb 22, 2007 | CLB | $15.9K | Sale | 200 | $79.43 | Discretionary |
| Feb 21, 2007 | CLB | $643.3K | Option Exercise | 35,000 | $18.38 | Discretionary |
| Feb 21, 2007 | CLB | $1.0M | Option Exercise | 80,000 | $13.06 | Discretionary |
| Feb 21, 2007 | CLB | $969.0K | Option Exercise | 50,000 | $19.38 | Discretionary |
| Feb 21, 2007 | CLB | $1.6M | Option Exercise | 100,000 | $16.10 | Discretionary |
| Feb 21, 2007 | CLB | $1.2M | Option Exercise | 140,000 | $8.84 | Discretionary |
| Feb 21, 2007 | CLB | $1.5M | Option Exercise | 150,000 | $10.26 | Discretionary |
| Feb 21, 2007 | CLB | $19.4M | Payment | 244,329 | $79.31 | Discretionary |
| Jan 31, 2007 | CLB | $0 | Option Exercise | 40,000 | $N/A | Discretionary |
| Jan 31, 2007 | CLB | $1.1M | Payment | 13,411 | $82.40 | Discretionary |
| May 2, 2006 | CLB | $460.7K | Option Exercise | 7,290 | $63.20 | Discretionary |
| May 2, 2006 | CLB | $0 | Option Exercise | 20,000 | $N/A | Discretionary |
| May 1, 2006 | CLB | $46.1K | Option Exercise | 5,500 | $8.38 | Discretionary |
| May 1, 2006 | CLB | $818.7K | Payment | 12,996 | $63.00 | Discretionary |
| May 1, 2006 | CLB | $460.9K | Option Exercise | 55,000 | $8.38 | Discretionary |
| Jan 17, 2006 | CLB | $631.2K | Payment | 14,687 | $42.98 | Discretionary |
| Jan 17, 2006 | CLB | $0 | Option Exercise | 40,000 | $N/A | Discretionary |
| Jun 1, 2005 | CLB | $694.3K | Payment | 27,183 | $25.54 | Discretionary |
| Jun 1, 2005 | CLB | $0 | Option Exercise | 27,183 | $N/A | Discretionary |