Josef H. von Rickenbach, Director at AILERON THERAPEUTICS INC (ALRN), bought 23,225 shares at $0.71 ($16K) on 2019-09-04, disclosed to the SEC on 2019-09-05.
Open-market purchase of $16k ALRN by Director. Below the thresholds we flag for high-conviction alerts (no C-suite role, rare reversal, cluster, or A-grade history).
Nothing distinguishes this filing.
| Filing → |
| ALRN | BUY | 2019-09-16 | $197K | — | Filing → |
| ALRN | BUY | 2019-09-04 | $20K | — | Filing → |
| ALRN | BUY | 2019-09-03 | $3K | — | Filing → |