David S. Tierney, Director at KEMPHARM, INC (KMPH), bought 1,000 shares at $4.20 ($4K) on 2017-03-20, disclosed to the SEC on 2017-03-21.
Open-market purchase of $4k KMPH by Director. Below the thresholds we flag for high-conviction alerts (no C-suite role, rare reversal, cluster, or A-grade history). Context: insider career grade D.
Nothing distinguishes this filing.
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