Andrew A. F. Hack, Director at Mersana Therapeutics, Inc. (MRSN), bought 355,310 shares at $3.29 ($1.1M) on 2022-05-24, disclosed to the SEC on 2022-05-26.
Open-market purchase of $1.1M MRSN by Director. 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.
| # | Price | Shares | Value | % of Total |
|---|---|---|---|---|
| 1 | $3.29 | 100,000 | $329K | 28.8% |
| 2 | $3.18 | 90,155 | $287K | 25.1% |
| 3 | $3.18 | 90,155 | $287K | 25.1% |
| 4 | $3.19 | 75,000 | $239K | 21.0% |
| Total | $3.21 avg | 355,310 | $1.1M | 100% |
| Filing → |
| DVAX | SELL | 2023-08-10 | $21.6M | — | Filing → |
| DVAX | SELL | 2023-06-16 | $6.3M | — | Filing → |
| DVAX | SELL | 2023-05-19 | $10.6M | — | Filing → |