BIIB · ISSUER CIK 875045
BIOGEN INC.
Between Aug 1, 2026 and Oct 29, 2026, 2 BIOGEN INC. insiders reported $0.00 of open-market purchases and $240K of sales on SEC Form 4.
↗2 insiders filed
Original Form 4 filings from Aug 1, 2026 to Oct 29, 2026. 1 of 1 sales were reported under a 10b5-1 plan.
$0.00Insider buying
$240KInsider selling
−$240KNet open-market
Oct 5, 2026Latest filing
| Ticker | Insider | Type | Owned | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Oct 5, 202617:00 | Oct 2, 2026 | BIIB | Chief Accounting Officer | M · Exercise | — | +27 | 1,467 | +2% | — | ||
| Oct 5, 202617:00 | Oct 2, 2026 | BIIB | Chief Accounting Officer | F · Tax | $219.88 | −8 | 1,459 | -1% | $2K | ||
| Aug 5, 202616:03 | Aug 4, 2026from Aug 3, 2026 | BIIB | Director | S · Sell10b5-1 | $202.15 | −1,186 | 2,689 | -31% | −$240K |