Elisabeth Allison, Director at HELICOS BIOSCIENCES CORP (HLCS), bought 1,000 shares at $4.98 ($5K) on 2008-05-27, disclosed to the SEC on 2008-05-28.
Open-market purchase of $5k HLCS 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.