Robert C. Marshall, Director at SIERRA MONITOR CORP /CA/ (SRMC), bought 21,333 shares at $1.63 ($35K) on 2007-06-18, disclosed to the SEC on 2007-06-21.
Open-market purchase of $35k SRMC 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.