Peter J. Barris, 10% Owner at Mersana Therapeutics, Inc. (MRSN), bought 3,750,000 shares at $4.00 ($15.0M) on 2019-03-05, disclosed to the SEC on 2019-03-06.
Open-market purchase of $15.0M MRSN by 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.
Negative factors outweigh the positive ones.
| Filing → |
| GNCA | BUY | 2019-06-25 | $10.0M | — | Filing → |
| TRVI | BUY | 2019-05-13 | $25.0M | — | Filing → |
| RGLS | BUY | 2019-05-09 | $1.2M | — | Filing → |