Earnings Per Share
Shares (Diluted)
Biogen Shares (Diluted) increased by 49366.7% to 148.4M in Q1 2026 compared to the prior quarter. Year-over-year, this metric grew by 1.2%, from 146.6M to 148.4M. This increase may warrant attention — for this metric, lower values are generally preferred.
Analysis
StatementIncome Statement
SectionEarnings Per Share
CategoryCapital Allocation
SignalLower is better
VolatilityStable
First reportedQ1 2014
Last reportedQ1 2026
How to read this metric
An increase indicates potential dilution from employee compensation or convertible instruments, which can reduce earnings per share.
Detailed definition
The weighted-average number of common shares outstanding plus the effect of all potentially dilutive securities, such as...
Peer comparison
Standard metric for all public companies; essential for understanding the impact of equity-based compensation.
Metric ID:
weighted_shares_dilutedHistorical Data
17 periods
| Q2 '21 | Q3 '21 | Q1 '22 | Q2 '22 | Q3 '22 | Q1 '23 | Q2 '23 | Q3 '23 | Q4 '23 | Q1 '24 | Q2 '24 | Q3 '24 | Q1 '25 | Q2 '25 | Q3 '25 | Q4 '25 | Q1 '26 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Value | 150.1M | 148.6M | 147.6M | 146.2M | 144.8M | 145.2M | 145.5M | 144.8M | 100K | 145.9M | 145.9M | 146.1M | 146.6M | 146.7M | 147.1M | 300K | 148.4M |
| QoQ Change | — | -1.0% | -0.7% | -0.9% | -1.0% | +0.3% | +0.2% | -0.5% | -99.9% | >999% | +0.0% | +0.1% | +0.3% | +0.1% | +0.3% | -99.8% | >999% |
| YoY Change | — | — | — | -2.6% | -2.6% | -1.6% | -0.5% | +0.0% | — | +0.5% | +0.3% | +0.9% | +0.5% | +0.5% | +0.7% | — | +1.2% |
Range100K – 150.1M
CAGR-0.3%
Avg YoY Growth-0.2%
Median YoY Growth+0.4%
Shares (Diluted) at Other Companies
Frequently Asked Questions
- What is Biogen's shares (diluted)?
- Biogen (BIIB) reported shares (diluted) of 148.4M in Q1 2026.
- How has Biogen's shares (diluted) changed year-over-year?
- Biogen's shares (diluted) increased by 1.2% year-over-year, from 146.6M to 148.4M.
- What does shares (diluted) mean?
- The average number of shares outstanding including all potential shares that could be created.