Brian J. Bertaux, Chief Financial Officer at HUDSON TECHNOLOGIES INC /NY (HDSN), bought 2,000 shares at $4.87 ($10K) on 2026-05-19, disclosed to the SEC on 2026-05-21.
Open-market purchase of $10k HDSN by Chief Financial Officer. 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.