Chulho Park, CHIEF TECHNOLOGY OFFICER at MATEON THERAPEUTICS INC (MATN), bought 22,173 shares at $0.18 ($4K) on 2020-11-19, disclosed to the SEC on 2020-11-23.
Open-market purchase of $4k MATN by CHIEF TECHNOLOGY OFFICER. Below the thresholds we flag for high-conviction alerts (no C-suite role, rare reversal, cluster, or A-grade history).
Nothing distinguishes this filing.