📊 Score Breakdown
Offering Ability
40
Cash Runway
0
Float Risk
2
Warrant Exposure
15
Convertible Debt—
🌦️ Dilution Forecast
☀️
Clear
No significant dilution signals
0%
No significant dilution signals detected for BIIB.
💹 Market Data
Market Cap$25.38B
Shares Outstanding146.76M
Float146.28M
Cash$3.82B
Debt$6.66B
Short InterestN/A
🏛 Institutional Holdings
QoQ: ↑ 3.8% shares (2025Q4 vs prior)
996 institutional holders · 149.68M shares
#1
VANGUARD GROUP INC
17.45M shares
#2
BlackRock, Inc.
14.81M shares
#3
PRIMECAP MANAGEMENT CO/CA/
14.76M shares
+ 17 more holders Sign up free to view →
📉 Short Interest
Short Interest3.83M
Days to Cover3.5
% of Float2.6%
FINRA data as of Mar 31, 2026
📁 Recent SEC Activity
xbrl
XBRL CONVERTIBLE
Dec 31, 2008
3
FORM3
Apr 06, 2026
4
INSIDER TRANSACTION
Apr 03, 2026
4
INSIDER TRANSACTION
Feb 17, 2026
4
INSIDER TRANSACTION
Feb 17, 2026
Full SEC filing analysis available with free account →