Vivian S. Lee, Director at MERRIMACK PHARMACEUTICALS INC (MACK), bought 10,000 shares at $10.05 ($101K) on 2015-08-12, disclosed to the SEC on 2015-08-14.
Open-market purchase of $100k MACK by Director. Below the thresholds we flag for high-conviction alerts (no C-suite role, rare reversal, cluster, or A-grade history).
Something here stands out, but not much.
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