Jack H. Nusbaum, Director at COWEN GROUP, INC. (COWN), bought 30,000 shares at $5.00 ($150K) on 2009-12-18, disclosed to the SEC on 2009-12-22.
Open-market purchase of $150k COWN 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.