M. James Barrett, Director, 10% Owner at PROTEOSTASIS THERAPEUTICS, INC. (PTI), bought 461,538 shares at $13.00 ($6.0M) on 2016-09-14, disclosed to the SEC on 2016-09-15.
Open-market purchase of $6.0M PTI 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 D.
Nothing distinguishes this filing.
| Filing → |
| GLYC | SELL | 2018-05-11 | $340K | — | Filing → |
| SURF | BUY | 2018-04-23 | $2.0M | — | Filing → |
| ADAP | BUY | 2018-03-28 | $13.7M | — | Filing → |