Edward Augustine Corcoran, Director at INSIGNIA SYSTEMS INC/MN (ISIG), bought 1,033 shares at $2.75 ($3K) on 2015-12-04, disclosed to the SEC on 2015-12-08.
Open-market purchase of $3k ISIG 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.