Alfred Lewis Goldberg, Director at REPLIGEN CORP (RGEN), bought 21,000 shares at $3.43 ($72K) on 2011-08-10, disclosed to the SEC on 2011-08-12.
Open-market purchase of $72k RGEN 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.