AZN vs BIIB Stock Comparison
AstraZeneca and Biogen stock analysis with 20 years of historical data and interactive charts
Compare AZN vs BIIB
AZN
Stock Price (October 2005)
$47.06
Stock Price (September 2025)
$74.43
10-Year Growth
120.12%
20-Year Growth
203.91%
Market Cap (September 2025)
$237.87 Billion
BIIB
Stock Price (October 2005)
$39.58
Stock Price (September 2025)
$138.46
10-Year Growth
-66.27%
20-Year Growth
164.70%
Market Cap (September 2025)
$20.54 Billion
20-Year Performance Chart
Interactive visualization of AZN vs BIIB stock performance (2005-2025)
20-Year Performance Data
| Year | AZN | BIIB |
|---|---|---|
| 2025 | +18.89% | -6.61% |
| 2024 | -2.14% | -42.88% |
| 2023 | -0.80% | -5.08% |
| 2022 | +19.03% | +13.43% |
| 2021 | +18.47% | -1.25% |
| 2020 | +2.04% | -16.78% |
| 2019 | +36.33% | -2.61% |
| 2018 | +11.58% | -9.95% |
| 2017 | +31.23% | +9.21% |
| 2016 | -14.51% | -3.75% |
| 2015 | +0.42% | -10.43% |
| 2014 | +25.24% | +21.09% |
| 2013 | +30.49% | +86.38% |
| 2012 | +5.26% | +28.96% |
| 2011 | +5.66% | +63.76% |
| 2010 | +2.49% | +25.00% |
| 2009 | +21.65% | +10.33% |
| 2008 | +1.10% | -14.75% |
| 2007 | -18.00% | +15.39% |
| 2006 | +9.48% | +5.24% |
| 2005 | +3.40% | +13.43% |
20-Year Average Return for AZN
10.20%
20-Year Average Return for BIIB
8.23%
24 Months Performance
| Month | AZN | BIIB |
|---|---|---|
| September 2025 | +4.52% | -0.32% |
| August 2025 | -8.07% | -0.20% |
| July 2025 | -2.23% | +1.62% |
| June 2025 | +2.93% | +4.42% |
| May 2025 | -3.19% | -6.83% |
| April 2025 | +1.13% | +9.04% |
| March 2025 | +3.54% | +3.56% |
| February 2025 | -9.60% | +1.31% |
| January 2025 | -6.90% | +4.22% |
| December 2024 | +2.32% | +7.40% |
| November 2024 | +5.62% | +8.19% |
| October 2024 | +10.57% | +9.66% |
| September 2024 | +10.02% | +5.67% |
| August 2024 | -7.89% | +2.90% |
| July 2024 | -1.53% | +8.71% |
| June 2024 | +1.28% | -0.87% |
| May 2024 | -2.06% | -3.92% |
| April 2024 | -11.37% | +0.00% |
| March 2024 | -4.65% | +2.47% |
| February 2024 | +2.62% | +14.21% |
| January 2024 | +2.64% | +8.53% |
| December 2023 | -3.80% | -9.32% |
| November 2023 | -1.25% | +2.37% |
| October 2023 | +0.00% | +0.00% |
24 Months Average Return for AZN
-0.64%
24 Months Average Return for BIIB
3.03%
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