Margaret Ann van Kempen, Director at CORE LABORATORIES N V (CLB), bought 100 shares at $184.79 ($18K) on 2014-02-28, disclosed to the SEC on 2014-03-04.
Open-market purchase of $18k CLB by Director. Below the thresholds we flag for high-conviction alerts (no C-suite role, rare reversal, cluster, or A-grade history).
Nothing distinguishes this filing.