Jerome Groopman, Director at Onconova Therapeutics, Inc. (ONTX), bought 10,000 shares at $0.36 ($4K) on 2020-05-19, disclosed to the SEC on 2020-05-21.
Open-market purchase of $4k ONTX by Director. Below the thresholds we flag for high-conviction alerts (no C-suite role, rare reversal, cluster, or A-grade history).
Something here stands out, but not much.