Andrew A. F. Hack, Director at Mersana Therapeutics, Inc. (MRSN), bought 231,198 shares at $3.35 ($800K) on 2022-05-23, disclosed to the SEC on 2022-05-23.
Open-market purchase of $800k 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 | $3.49 | 100,000 | $349K | 43.7% |
| 2 | $3.46 | 100,000 | $346K | 43.3% |
| 3 | $3.35 | 15,599 | $52K | 6.5% |
| 4 | $3.35 | 15,599 | $52K | 6.5% |
| Total | $3.46 avg | 231,198 | $800K | 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 → |