Bihua Chen, Director, 10% Owner at PROTEOSTASIS THERAPEUTICS, INC. (PTI), bought 421,657 shares at $7.24 ($3.5M) on 2016-11-03, disclosed to the SEC on 2016-11-07.
High-signal trade — passes our conviction filters but the AI narrative is still being generated. Check back shortly.
Nothing distinguishes this filing.
| # | Price | Shares | Value | % of Total |
|---|---|---|---|---|
| 1 | $7.24 | 20,277 | $147K | 4.2% |
| 2 | $7.24 | 20,277 | $147K | 4.2% |
| 3 | $7.27 | 2,597 | $19K | 0.5% |
| 4 | $8.09 | 73,403 | $594K | 16.9% |
| 5 | $8.09 | 73,403 | $594K | 16.9% |
| 6 | $8.69 | 231,700 |
| $2.0M |
| 57.3% |
| Total | $8.33 avg | 421,657 | $3.5M | 100% |
| Filing → |
| CRBP | SELL | 2025-12-15 | $688K | — | Filing → |
| AARD | BUY | 2025-02-19 | $3.0M | — | Filing → |
| BIOA | BUY | 2024-10-01 | $8.1M | — | Filing → |