Xiangmin Cui, Director, 10% Owner at ALPINE IMMUNE SCIENCES, INC. (ALPN), bought 375,000 shares at $12.50 ($4.7M) on 2023-11-09, disclosed to the SEC on 2023-11-14.
Open-market purchase of $4.7M ALPN by Director, 10% Owner. Below the thresholds we flag for high-conviction alerts (no C-suite role, rare reversal, cluster, or A-grade history). Context: insider career grade C.
Nothing distinguishes this filing.
| Filing → |
| BYSI | SELL | 2025-08-15 | $10K | — | Filing → |
| BYSI | SELL | 2025-08-11 | $2.1M | — | Filing → |
| NUVB | BUY | 2024-06-26 | $1.7M | — | Filing → |