John F. Hamilton, Director at Aridis Pharmaceuticals, Inc. (ARDS), bought 2,000 shares at $4.87 ($10K) on 2021-07-27, disclosed to the SEC on 2021-07-27.
Open-market purchase of $10k ARDS 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.