BIIB
Biogen
PE ratio, current and historical analysis
- Stocks
- Healthcare
- NASDAQ: BIIB
- PE Ratio
The current PE ratio for Biogen stock as of Aug 21, 2026 is 38.17. This is calculated based on the current EPS of $5.68 and the stock price of $216.78 per share. The P/E ratio has increased by 69% from the past four quarters average of 22.6.
BIIB PE ratio history
The average historical PE ratio of Biogen for the last ten years is 17.7. The current PE ratio of 38.17 is 116% above the historical average. Over the past ten years, BIIB's PE ratio was at its highest in the Jun 2026 quarter at 38.04, when the stock price was $216.06 and the EPS was $5.68. The lowest value was in the Jun 2020 quarter, when it reached 7.83 with a price of $267.55 and an EPS of $34.19.
Biogen PE ratio by year
Maximum annual increase: 144.28% in 2023
Maximum annual decrease: -57.73% in 2024
| Year | PE ratio | PE change | Price | EPS |
|---|---|---|---|---|
| 2025 | 19.93 | 46.11% | $175.99 | $8.83 |
| 2024 | 13.64 | -57.73% | $152.92 | $11.21 |
| 2023 | 32.27 | 144.28% | $258.77 | $8.02 |
| 2022 | 13.21 | -42.52% | $276.92 | $20.96 |
| 2021 | 22.98 | 133.3% | $239.92 | $10.44 |
| 2020 | 9.85 | 4.45% | $244.86 | $24.86 |
| 2019 | 9.43 | -32.21% | $296.73 | $31.47 |
| 2018 | 13.91 | -47.86% | $300.92 | $21.63 |
| 2017 | 26.68 | 59.57% | $318.57 | $11.94 |
| 2016 | 16.72 | -16.06% | $283.58 | $16.96 |
| 2015 | 19.92 | -27.11% | $306.35 | $15.38 |
| 2014 | 27.33 | -23.17% | $339.45 | $12.42 |
| 2013 | 35.57 | 40.93% | $279.57 | $7.86 |
| 2012 | 25.24 | 16.74% | $146.37 | $5.8 |
| 2011 | 21.62 | 28.31% | $110.05 | $5.09 |
Biogen PE ratio by quarter (TTM)
| Year | PE ratio | PE change | Price | EPS |
|---|---|---|---|---|
| Jun 2026 | 38.04 | 93.98% | $216.06 | $5.68 |
| Mar 2026 | 19.61 | -1.61% | $183.33 | $9.35 |
| Dec 2025 | 19.93 | 56.31% | $175.99 | $8.83 |
| Sep 2025 | 12.75 | 6.43% | $140.08 | $10.99 |
| Jun 2025 | 11.98 | -11.06% | $125.59 | $10.48 |
| Mar 2025 | 13.47 | -1.25% | $136.84 | $10.16 |
| Dec 2024 | 13.64 | -21.83% | $152.92 | $11.21 |
| Sep 2024 | 17.45 | -40.01% | $193.84 | $11.11 |
| Jun 2024 | 29.09 | 8.59% | $231.82 | $7.97 |
| Mar 2024 | 26.79 | -16.98% | $215.63 | $8.05 |
| Dec 2023 | 32.27 | 27.45% | $258.77 | $8.02 |
| Sep 2023 | 25.32 | 64.31% | $257.01 | $10.15 |
| Jun 2023 | 15.41 | 19.92% | $284.85 | $18.48 |
| Mar 2023 | 12.85 | -2.73% | $278.03 | $21.64 |
| Dec 2022 | 13.21 | -2.65% | $276.92 | $20.96 |
BIIB Price vs fair value
BIIB average PE ratio chart
What this chart measures
The Historical Valuation Regime chart shows where the stock's current valuation sits relative to its own historical valuation range over the selected lookback period.
This is a history-relative tool, not a market-relative percentile. It does not compare the stock to other companies. Instead, it compares each historical valuation reading to the stock's own past readings.
Percentile logic
The threshold lines are calculated them from the stock's real historical values using percentile interpolation. That is why some colored bands are narrow while others are wide: the band widths reflect how the stock actually traded through time.
Regime map
| Historical percentile | Regime | Chart meaning |
|---|---|---|
| 0-10 | Historically Low | Deep cheap zone |
| >10-25 | Below Average | Cheap relative to history |
| >25-75 | Average | Within the normal historical range |
| >75-90 | Above Average | Expensive relative to history |
| >90-100 | Historically High | Extreme or stretched valuation |
How to read each part
| Chart element | What it tells you |
|---|---|
| Main line | The actual historical valuation values over time for the selected metric. |
| Dashed horizontal lines | The stock's computed P10, P25, Median, P75, and P90 thresholds for the selected period. |
| Colored bands | The historical valuation zones between those thresholds. |
| Metric boxes | Current ratio, historical median, current percentile, and current regime. |
| Timeline strip | A condensed regime history showing how the stock moved between cheap, fair, and expensive states across each observation. |
Important metric definitions
Current Percentile is the percentile rank of the latest valid historical observation within the selected lookback range.
Current Regime is assigned directly from the latest observation's percentile bucket using the fixed 10 / 25 / 75 / 90 cutoffs shown above.
How to use it well
This chart is most useful for answering a narrow question: Is this stock trading high, low, or normal relative to its own history? It works best alongside growth, profitability, and forward-looking business analysis, because a stock can deserve a higher or lower regime if its business quality has changed.
BIIB's current P/E ratio is above the 3, 5 and 10-year historical averages.
PE comparison
Biogen's P/E of 38.17 is above the Healthcare sector and the industry average but below its peers average. Compared to its Healthcare sector average of 24.52, Biogen's P/E is 56% higher.
BIIB PE vs peers
Frequently asked questions
What is Biogen's PE ratio?
The price to earnings ratio for BIIB stock as of Aug 21, 2026, stands at 38.17.
What is the 3-year average PE ratio for Biogen (BIIB)?
As an average over the last 3 years, BIIB stock has a PE ratio of 21.7.
What is the 5-year average PE ratio for Biogen (BIIB)?
As an average over the last 5 years, BIIB stock has a PE ratio of 20.07.
What is the highest PE ratio for BIIB?
Within the last ten years, the current P/E ratio is at its peak with a value of 38.17.
How does the current PE ratio for BIIB compare to its historical average?
The current price to earnings ratio of BIIB is 116% higher than the 10-year historical average.
How is BIIB's PE ratio calculated (Biogen PE ratio formula)?
The PE ratio is calculated by taking the latest stock price and dividing it by the EPS for the last 12 months. As of today (Aug 21, 2026), Biogen's stock price is $216.78. The earnings per share for the trailing twelve months (TTM) ending Jun 2026 is $5.68. Therefore, Biogen's P/E ratio for today is 38.17. PE RATIO(38.17) = STOCK PRICE($216.78) / TTM EPS($5.68)
All PE ratio stats are based on quarterly TTM periods, unless otherwise specified.