Biogen (BIIB) Historical Monthly & Quarterly Returns
Dividend-adjusted returns by month and quarter. Compare performance across years.
Biogen
BIIB
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | +2.2% | +6.6% | 4.4% | +6.0% | — | — | — | — | — | — | — | — |
| 2025 | 5.9% | 2.4% | 2.6% | 11.5% | +7.2% | 3.2% | +1.9% | +3.3% | +5.9% | +10.1% | +18.0% | 3.3% |
| 2024 | 4.7% | 12.0% | 0.6% | 0.4% | +4.7% | +3.1% | 8.0% | 4.0% | 5.3% | 10.2% | 7.7% | 4.8% |
| 2023 | +5.0% | 7.2% | +3.0% | +9.4% | 2.6% | 3.9% | 5.1% | 1.0% | 3.9% | 7.6% | 1.5% | +10.5% |
| 2022 | 5.8% | 6.6% | 0.2% | 1.5% | 3.6% | +2.0% | +5.5% | 9.2% | +36.7% | +6.2% | +7.7% | 9.3% |
| 2021 | +15.4% | 3.4% | +2.5% | 4.4% | +0.1% | +29.5% | 5.6% | +3.7% | 16.5% | 5.8% | 11.6% | +1.8% |
| 2020 | 9.4% | +14.7% | +2.6% | 6.2% | +3.5% | 12.9% | +2.7% | +4.7% | 1.4% | 11.1% | 4.7% | +2.0% |
| 2019 | +10.9% | 1.7% | 27.9% | 3.0% | 4.3% | +6.6% | +1.7% | 7.6% | +5.9% | +28.3% | +0.4% | 1.0% |
| 2018 | +9.2% | 16.9% | 5.2% | 0.1% | +7.4% | 1.3% | +15.2% | +5.7% | 0.1% | 13.9% | +9.7% | 9.8% |
| 2017 | 2.2% | +4.1% | 5.3% | 0.8% | 8.6% | +9.5% | +6.7% | +9.3% | 1.1% | 0.5% | +3.4% | 1.1% |
| 2016 | 10.9% | 5.0% | +0.3% | +5.6% | +5.4% | 16.5% | +19.9% | +5.4% | +2.4% | 10.5% | +5.0% | 3.6% |
| 2015 | +14.6% | +5.2% | +3.1% | 11.4% | +6.2% | +1.8% | 21.1% | 6.7% | 1.8% | 0.4% | 1.3% | +6.8% |
| 2014 | +11.8% | +9.0% | 10.2% | 6.1% | +11.2% | 1.3% | +6.1% | +2.6% | 3.6% | 2.9% | 4.2% | +10.3% |
| 2013 | +6.6% | +6.6% | +15.8% | +13.7% | +8.5% | 9.4% | +1.4% | 2.3% | +13.0% | +1.4% | +19.2% | 3.9% |
| 2012 | +7.2% | 1.3% | +8.2% | +6.4% | 2.4% | +10.4% | +1.0% | +0.5% | +1.8% | 7.4% | +7.9% | 1.8% |
| 2011 | 2.4% | +4.5% | +7.4% | +32.9% | 3.0% | +12.9% | 4.7% | 7.5% | 1.1% | +24.9% | 1.2% | 4.3% |
| 2010 | +0.4% | +2.4% | +4.3% | 7.1% | 11.0% | +0.0% | +17.8% | 3.7% | +4.3% | +11.7% | +2.0% | +4.8% |
| 2009 | +2.1% | 5.4% | +13.9% | 7.8% | +7.1% | 12.8% | +5.3% | +5.6% | +0.6% | 16.6% | +11.4% | +14.0% |
| 2008 | +7.1% | 4.2% | +5.7% | 1.6% | +3.4% | 10.9% | +24.8% | 27.0% | 1.3% | 15.4% | 0.6% | +12.6% |
| 2007 | 1.7% | 6.5% | 1.8% | +6.4% | +10.6% | +2.5% | +5.7% | +12.9% | +3.9% | +12.2% | 0.4% | 23.2% |
| 2006 | 1.2% | +5.6% | 0.3% | 4.8% | +4.0% | 0.7% | 9.2% | +5.1% | +1.1% | +6.5% | +9.8% | 5.9% |
| 2005 | 2.5% | 40.5% | 10.7% | +5.0% | +7.9% | 11.9% | +14.0% | +7.3% | 6.3% | +2.9% | +5.4% | +5.8% |
| 2004 | +17.1% | +30.0% | 0.6% | +6.2% | +5.3% | +1.8% | 5.1% | 1.1% | +3.1% | 4.9% | +0.9% | +13.5% |
| 2003 | 3.3% | 10.4% | +19.0% | 4.3% | +16.7% | 11.1% | 0.6% | +2.8% | 4.1% | +5.6% | +8.7% | 3.9% |
| 2002 | 13.7% | +5.7% | +2.4% | 14.5% | 21.9% | 17.3% | +25.8% | 9.9% | +3.3% | +10.8% | 28.7% | +1.1% |
| 2001 | 6.9% | 4.1% | 29.1% | +23.0% | +25.2% | +9.9% | 20.3% | +9.8% | 16.4% | +21.0% | +17.2% | 1.9% |
| 2000 | +28.4% | +11.7% | 30.3% | 34.9% | 0.3% | +83.8% | +4.7% | +13.7% | +25.6% | +11.9% | 11.3% | +8.9% |
| 1999 | +7.5% | 14.3% | +18.6% | 1.2% | 0.6% | +52.7% | +28.7% | +28.2% | 26.0% | +23.5% | +9.1% | +55.0% |
| 1998 | +21.5% | +8.6% | 2.4% | 18.7% | 12.5% | 25.1% | +0.5% | 24.1% | +32.0% | +25.8% | +12.4% | +39.8% |
| 1997 | 2.0% | +7.0% | 4.3% | 25.4% | +26.7% | +7.7% | +12.4% | +11.5% | +37.9% | 9.0% | 8.3% | 1.5% |
| 1996 | +10.2% | 5.6% | +9.8% | +29.6% | 10.8% | 10.3% | 33.0% | +51.2% | +2.6% | 10.0% | +12.2% | 2.0% |
| 1995 | +20.6% | +46.3% | +0.0% | +6.7% | +12.5% | +25.0% | +20.5% | +1.8% | +13.9% | +51.1% | +15.7% | +41.9% |
| 1994 | +12.7% | 19.0% | 26.2% | 6.5% | +3.4% | 35.0% | +12.8% | +0.0% | 13.6% | +21.1% | 13.0% | 15.0% |
| 1993 | 19.9% | +0.0% | 18.1% | 17.4% | +18.4% | 2.2% | 31.8% | +40.0% | 4.8% | +12.5% | +6.7% | 4.2% |
| 1992 | +18.9% | 9.7% | 21.5% | 27.3% | +0.0% | 17.3% | +29.1% | 16.2% | 9.2% | +46.3% | +10.8% | 16.6% |
| 1991 | — | — | — | — | — | — | — | — | +0.0% | 1.6% | 35.1% | +8.5% |
| Avg | +3.9% | 0.2% | 2.4% | 1.9% | +3.3% | +1.6% | +3.5% | +3.1% | +2.2% | +5.9% | +1.8% | +3.4% |
| Median | +2.2% | 1.7% | 0.3% | 1.6% | +3.7% | 1.0% | +3.7% | +2.7% | +0.0% | +2.9% | +3.4% | 1.1% |
| Win % | 57% | 43% | 43% | 34% | 62% | 47% | 68% | 59% | 49% | 54% | 60% | 46% |
2026
Jan+2.2%
Feb+6.6%
Mar4.4%
Apr+6.0%
May—
Jun—
Jul—
Aug—
Sep—
Oct—
Nov—
Dec—
2025
Jan5.9%
Feb2.4%
Mar2.6%
Apr11.5%
May+7.2%
Jun3.2%
Jul+1.9%
Aug+3.3%
Sep+5.9%
Oct+10.1%
Nov+18.0%
Dec3.3%
2024
Jan4.7%
Feb12.0%
Mar0.6%
Apr0.4%
May+4.7%
Jun+3.1%
Jul8.0%
Aug4.0%
Sep5.3%
Oct10.2%
Nov7.7%
Dec4.8%
2023
Jan+5.0%
Feb7.2%
Mar+3.0%
Apr+9.4%
May2.6%
Jun3.9%
Jul5.1%
Aug1.0%
Sep3.9%
Oct7.6%
Nov1.5%
Dec+10.5%
2022
Jan5.8%
Feb6.6%
Mar0.2%
Apr1.5%
May3.6%
Jun+2.0%
Jul+5.5%
Aug9.2%
Sep+36.7%
Oct+6.2%
Nov+7.7%
Dec9.3%
2021
Jan+15.4%
Feb3.4%
Mar+2.5%
Apr4.4%
May+0.1%
Jun+29.5%
Jul5.6%
Aug+3.7%
Sep16.5%
Oct5.8%
Nov11.6%
Dec+1.8%
2020
Jan9.4%
Feb+14.7%
Mar+2.6%
Apr6.2%
May+3.5%
Jun12.9%
Jul+2.7%
Aug+4.7%
Sep1.4%
Oct11.1%
Nov4.7%
Dec+2.0%
2019
Jan+10.9%
Feb1.7%
Mar27.9%
Apr3.0%
May4.3%
Jun+6.6%
Jul+1.7%
Aug7.6%
Sep+5.9%
Oct+28.3%
Nov+0.4%
Dec1.0%
2018
Jan+9.2%
Feb16.9%
Mar5.2%
Apr0.1%
May+7.4%
Jun1.3%
Jul+15.2%
Aug+5.7%
Sep0.1%
Oct13.9%
Nov+9.7%
Dec9.8%
2017
Jan2.2%
Feb+4.1%
Mar5.3%
Apr0.8%
May8.6%
Jun+9.5%
Jul+6.7%
Aug+9.3%
Sep1.1%
Oct0.5%
Nov+3.4%
Dec1.1%
2016
Jan10.9%
Feb5.0%
Mar+0.3%
Apr+5.6%
May+5.4%
Jun16.5%
Jul+19.9%
Aug+5.4%
Sep+2.4%
Oct10.5%
Nov+5.0%
Dec3.6%
2015
Jan+14.6%
Feb+5.2%
Mar+3.1%
Apr11.4%
May+6.2%
Jun+1.8%
Jul21.1%
Aug6.7%
Sep1.8%
Oct0.4%
Nov1.3%
Dec+6.8%
2014
Jan+11.8%
Feb+9.0%
Mar10.2%
Apr6.1%
May+11.2%
Jun1.3%
Jul+6.1%
Aug+2.6%
Sep3.6%
Oct2.9%
Nov4.2%
Dec+10.3%
2013
Jan+6.6%
Feb+6.6%
Mar+15.8%
Apr+13.7%
May+8.5%
Jun9.4%
Jul+1.4%
Aug2.3%
Sep+13.0%
Oct+1.4%
Nov+19.2%
Dec3.9%
2012
Jan+7.2%
Feb1.3%
Mar+8.2%
Apr+6.4%
May2.4%
Jun+10.4%
Jul+1.0%
Aug+0.5%
Sep+1.8%
Oct7.4%
Nov+7.9%
Dec1.8%
2011
Jan2.4%
Feb+4.5%
Mar+7.4%
Apr+32.9%
May3.0%
Jun+12.9%
Jul4.7%
Aug7.5%
Sep1.1%
Oct+24.9%
Nov1.2%
Dec4.3%
2010
Jan+0.4%
Feb+2.4%
Mar+4.3%
Apr7.1%
May11.0%
Jun+0.0%
Jul+17.8%
Aug3.7%
Sep+4.3%
Oct+11.7%
Nov+2.0%
Dec+4.8%
2009
Jan+2.1%
Feb5.4%
Mar+13.9%
Apr7.8%
May+7.1%
Jun12.8%
Jul+5.3%
Aug+5.6%
Sep+0.6%
Oct16.6%
Nov+11.4%
Dec+14.0%
2008
Jan+7.1%
Feb4.2%
Mar+5.7%
Apr1.6%
May+3.4%
Jun10.9%
Jul+24.8%
Aug27.0%
Sep1.3%
Oct15.4%
Nov0.6%
Dec+12.6%
2007
Jan1.7%
Feb6.5%
Mar1.8%
Apr+6.4%
May+10.6%
Jun+2.5%
Jul+5.7%
Aug+12.9%
Sep+3.9%
Oct+12.2%
Nov0.4%
Dec23.2%
2006
Jan1.2%
Feb+5.6%
Mar0.3%
Apr4.8%
May+4.0%
Jun0.7%
Jul9.2%
Aug+5.1%
Sep+1.1%
Oct+6.5%
Nov+9.8%
Dec5.9%
2005
Jan2.5%
Feb40.5%
Mar10.7%
Apr+5.0%
May+7.9%
Jun11.9%
Jul+14.0%
Aug+7.3%
Sep6.3%
Oct+2.9%
Nov+5.4%
Dec+5.8%
2004
Jan+17.1%
Feb+30.0%
Mar0.6%
Apr+6.2%
May+5.3%
Jun+1.8%
Jul5.1%
Aug1.1%
Sep+3.1%
Oct4.9%
Nov+0.9%
Dec+13.5%
2003
Jan3.3%
Feb10.4%
Mar+19.0%
Apr4.3%
May+16.7%
Jun11.1%
Jul0.6%
Aug+2.8%
Sep4.1%
Oct+5.6%
Nov+8.7%
Dec3.9%
2002
Jan13.7%
Feb+5.7%
Mar+2.4%
Apr14.5%
May21.9%
Jun17.3%
Jul+25.8%
Aug9.9%
Sep+3.3%
Oct+10.8%
Nov28.7%
Dec+1.1%
2001
Jan6.9%
Feb4.1%
Mar29.1%
Apr+23.0%
May+25.2%
Jun+9.9%
Jul20.3%
Aug+9.8%
Sep16.4%
Oct+21.0%
Nov+17.2%
Dec1.9%
2000
Jan+28.4%
Feb+11.7%
Mar30.3%
Apr34.9%
May0.3%
Jun+83.8%
Jul+4.7%
Aug+13.7%
Sep+25.6%
Oct+11.9%
Nov11.3%
Dec+8.9%
1999
Jan+7.5%
Feb14.3%
Mar+18.6%
Apr1.2%
May0.6%
Jun+52.7%
Jul+28.7%
Aug+28.2%
Sep26.0%
Oct+23.5%
Nov+9.1%
Dec+55.0%
1998
Jan+21.5%
Feb+8.6%
Mar2.4%
Apr18.7%
May12.5%
Jun25.1%
Jul+0.5%
Aug24.1%
Sep+32.0%
Oct+25.8%
Nov+12.4%
Dec+39.8%
1997
Jan2.0%
Feb+7.0%
Mar4.3%
Apr25.4%
May+26.7%
Jun+7.7%
Jul+12.4%
Aug+11.5%
Sep+37.9%
Oct9.0%
Nov8.3%
Dec1.5%
1996
Jan+10.2%
Feb5.6%
Mar+9.8%
Apr+29.6%
May10.8%
Jun10.3%
Jul33.0%
Aug+51.2%
Sep+2.6%
Oct10.0%
Nov+12.2%
Dec2.0%
1995
Jan+20.6%
Feb+46.3%
Mar+0.0%
Apr+6.7%
May+12.5%
Jun+25.0%
Jul+20.5%
Aug+1.8%
Sep+13.9%
Oct+51.1%
Nov+15.7%
Dec+41.9%
1994
Jan+12.7%
Feb19.0%
Mar26.2%
Apr6.5%
May+3.4%
Jun35.0%
Jul+12.8%
Aug+0.0%
Sep13.6%
Oct+21.1%
Nov13.0%
Dec15.0%
1993
Jan19.9%
Feb+0.0%
Mar18.1%
Apr17.4%
May+18.4%
Jun2.2%
Jul31.8%
Aug+40.0%
Sep4.8%
Oct+12.5%
Nov+6.7%
Dec4.2%
1992
Jan+18.9%
Feb9.7%
Mar21.5%
Apr27.3%
May+0.0%
Jun17.3%
Jul+29.1%
Aug16.2%
Sep9.2%
Oct+46.3%
Nov+10.8%
Dec16.6%
1991
Jan—
Feb—
Mar—
Apr—
May—
Jun—
Jul—
Aug—
Sep+0.0%
Oct1.6%
Nov35.1%
Dec+8.5%
Avg
Jan+3.9%
Feb0.2%
Mar2.4%
Apr1.9%
May+3.3%
Jun+1.6%
Jul+3.5%
Aug+3.1%
Sep+2.2%
Oct+5.9%
Nov+1.8%
Dec+3.4%
Median
Jan+2.2%
Feb1.7%
Mar0.3%
Apr1.6%
May+3.7%
Jun1.0%
Jul+3.7%
Aug+2.7%
Sep+0.0%
Oct+2.9%
Nov+3.4%
Dec1.1%
Win %
Jan57%
Feb43%
Mar43%
Apr34%
May62%
Jun47%
Jul68%
Aug59%
Sep49%
Oct54%
Nov60%
Dec46%
Frequently asked questions
What is the best performing month for Biogen (BIIB) stock?
- Historically, October is the best performing month for Biogen (BIIB) stock with an average return of +5.89%.
What is the worst performing month for Biogen (BIIB) stock?
- Historically, March is the worst performing month for Biogen (BIIB) stock with an average return of 2.43%.
What is the best performing quarter for Biogen (BIIB) stock?
- Historically, Q4 is the best performing quarter for Biogen (BIIB) stock with an average return of +12.76%.
What is the worst performing quarter for Biogen (BIIB) stock?
- Historically, Q1 is the worst performing quarter for Biogen (BIIB) stock with an average return of +1.45%.
What is the best performing year for Biogen (BIIB) stock?
- Historically, 1995 is the best performing year for Biogen (BIIB) stock with a return of +817.64%.
What is the worst performing year for Biogen (BIIB) stock?
- Historically, 1994 is the worst performing year for Biogen (BIIB) stock with a return of 63.04%.
Which month has the highest win rate for Biogen (BIIB) stock?
- Historically, July has the highest win rate for Biogen (BIIB) stock — positive in 68% of years.
Which month has the lowest win rate for Biogen (BIIB) stock?
- Historically, April has the lowest win rate for Biogen (BIIB) stock — positive in 34% of years.
Which quarter has the highest win rate for Biogen (BIIB) stock?
- Historically, Q4 has the highest win rate for Biogen (BIIB) stock — positive in 63% of years.
Which quarter has the lowest win rate for Biogen (BIIB) stock?
- Historically, Q2 has the lowest win rate for Biogen (BIIB) stock — positive in 49% of years.
Data & methodology
How are returns calculated?
- We compare the closing price at the end of each period (month or quarter) with the closing price at the end of the previous period. The return is the percentage change. All prices are adjusted for dividends and stock splits. Based on historical prices from our data provider.
What is average vs median?
- Average is the arithmetic mean of returns for each period across years. Median is the middle value. Both exclude empty cells. Use median to reduce impact of outliers.
What does the heatmap show?
- Green cells indicate positive returns, red cells indicate negative returns. The darker the color, the stronger the move. Average and Median rows summarize each column across years.
What is Win %?
- Percentage of years when the period had a positive return. For example, 80% for January means January was positive in 80% of the years in the selected range.
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BIIB Overview
Company profile, financial tools, and key metrics
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BIIB Revenue Counter
Earns $311.09 every second. See per minute, hour, and day.
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BIIB Earnings Counter
Earns $41.01 per second net profit. See per minute, hour, and day.
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BIIB Economic Scale
Exceeds Bermuda's GDP. Compare with world economies.
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BIIB What If Invested
What if you had invested $1,000? See historical returns from any date.
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BIIB How It Makes Money
Discover visual breakdown of $9.81B in revenue — where it comes from and where it goes.
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BIIB Price Target Scenarios
Model bear, base, and bull cases with EPS growth and exit P/E — pre-filled from analysts and history.
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BIIB Daily Price Character
Explosive · 48.1% historical win rate (green days). Streaks & record days.
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BIIB Buybacks
Recent repurchase activity. Shareholder yield & SBC comparison.
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BIIB Stock Split History
2 splits on record. Dates, ratios, and cumulative multiple.
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BIIB Financials
Revenue, EPS, EBITDA, market cap, debt and balance sheet history with annual and quarterly data.
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