Alfred Sandrock, Head of Research & Development at BIOGEN INC. (BIIB), sold 7,672 shares at $440.00 ($3.4M) on 2021-06-07, disclosed to the SEC on 2021-06-09.
Open-market sale of $3.4M BIIB by Head of Research & Development. Not flagged as scheduled, tax-driven, or recurring — but no specific bearish signal from our filters. Reasons for insider sales vary widely.
Nothing distinguishes this filing.
| Filing → |
| VYGR | SELL | 2026-02-20 | $40K | — | Filing → |
| VYGR | SELL | 2026-02-11 | $46K | — | Filing → |
| VYGR | SELL | 2025-04-04 | $37K | — | Filing → |