SEC Form 4Coverage since Aug 3, 2026
$BIIB insider trading
Over the last 12 months, Biogen insiders reported no purchases and 1 sale totaling $240K across SEC Form 4 filings. 100% of the activity was filed under pre-arranged 10b5-1 trading plans.
- Bought · 12m
- — 0 events
- Sold · 12m
- $240K 1 event
- Events · 12m
- 1 Form 4 filings, grouped
- Insiders · 12m
- 1 distinct reporters
- 10b5-1 share
- 100% pre-arranged plans
Side
Price · $BIIB · 12Mvia TradingView
Top insiders · 12m
Minor Lloyd—1× · $240K
All insider trades
1 event
| Date | Insider | Type | Shares | Avg price | Value | Δ stake | Marks |
|---|---|---|---|---|---|---|---|
| Aug 4, 2026 | Minor LloydD | ▼ Sale | 1,186 | $202.15 | $240K | -30.6% | plan · 2 tranches |
About Form 4
Corporate insiders — officers, directors and 10%+ owners — must report their trades to the SEC on Form 4 within two business days. We group each filing's transactions into one economic event (a laddered 10b5-1 sale is one event, not 25 rows), flag pre-arranged plans and late filings, and link every event to its AI-scored article in the $BIIB feed.