Vivian S. Lee, Director at MERRIMACK PHARMACEUTICALS INC (MACK), bought 20,000 shares at $10.23 ($205K) on 2014-12-23, disclosed to the SEC on 2014-12-23.
Open-market purchase of $205k MACK 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.
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