AMGN vs BIIB Stock Comparison
Amgen and Biogen stock analysis with 20 years of historical data and interactive charts
Compare AMGN vs BIIB
AMGN
Stock Price (October 2005)
$79.64
Stock Price (September 2025)
$274.14
10-Year Growth
92.05%
20-Year Growth
187.84%
Market Cap (September 2025)
$151.93 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 AMGN vs BIIB stock performance (2005-2025)
20-Year Performance Data
| Year | AMGN | BIIB |
|---|---|---|
| 2025 | +11.59% | -6.61% |
| 2024 | -9.71% | -42.88% |
| 2023 | +13.89% | -5.08% |
| 2022 | +19.52% | +13.43% |
| 2021 | +2.34% | -1.25% |
| 2020 | -1.59% | -16.78% |
| 2019 | +29.44% | -2.61% |
| 2018 | +13.21% | -9.95% |
| 2017 | +18.60% | +9.21% |
| 2016 | -5.24% | -3.75% |
| 2015 | +3.56% | -10.43% |
| 2014 | +40.22% | +21.09% |
| 2013 | +30.34% | +86.38% |
| 2012 | +37.05% | +28.96% |
| 2011 | +16.79% | +63.76% |
| 2010 | -4.89% | +25.00% |
| 2009 | -4.10% | +10.33% |
| 2008 | +23.93% | -14.75% |
| 2007 | -32.11% | +15.39% |
| 2006 | -15.00% | +5.24% |
| 2005 | -0.95% | +13.43% |
20-Year Average Return for AMGN
9.39%
20-Year Average Return for BIIB
8.23%
24 Months Performance
| Month | AMGN | BIIB |
|---|---|---|
| September 2025 | +1.67% | -0.32% |
| August 2025 | +2.36% | -0.20% |
| July 2025 | -1.55% | +1.62% |
| June 2025 | +3.32% | +4.42% |
| May 2025 | -2.39% | -6.83% |
| April 2025 | +5.50% | +9.04% |
| March 2025 | -0.25% | +3.56% |
| February 2025 | -6.98% | +1.31% |
| January 2025 | -9.16% | +4.22% |
| December 2024 | +6.70% | +7.40% |
| November 2024 | +11.96% | +8.19% |
| October 2024 | +0.05% | +9.66% |
| September 2024 | +2.58% | +5.67% |
| August 2024 | -0.19% | +2.90% |
| July 2024 | -6.45% | +8.71% |
| June 2024 | -1.61% | -0.87% |
| May 2024 | -9.95% | -3.92% |
| April 2024 | +3.32% | +0.00% |
| March 2024 | -1.40% | +2.47% |
| February 2024 | +17.61% | +14.21% |
| January 2024 | -5.37% | +8.53% |
| December 2023 | -5.41% | -9.32% |
| November 2023 | -4.02% | +2.37% |
| October 2023 | +0.00% | +0.00% |
24 Months Average Return for AMGN
0.01%
24 Months Average Return for BIIB
3.03%
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