GILD vs BIIB Stock Comparison
Gilead Sciences and Biogen stock analysis with 20 years of historical data and interactive charts
Compare GILD vs BIIB
GILD
Stock Price (November 2005)
$47.25
Stock Price (October 2025)
$116.06
10-Year Growth
57.39%
20-Year Growth
321.90%
Market Cap (October 2025)
$151.59 Billion
BIIB
Stock Price (November 2005)
$40.51
Stock Price (October 2025)
$147.99
10-Year Growth
-56.81%
20-Year Growth
174.16%
Market Cap (October 2025)
$22.22 Billion
20-Year Performance Chart
Interactive visualization of GILD vs BIIB stock performance (2005-2025)
20-Year Performance Data
| Year | GILD | BIIB |
|---|---|---|
| 2025 | +33.14% | +2.85% |
| 2024 | +15.50% | -42.88% |
| 2023 | -1.46% | -5.08% |
| 2022 | +23.68% | +13.43% |
| 2021 | +25.96% | -1.25% |
| 2020 | -7.06% | -16.78% |
| 2019 | +6.37% | -2.61% |
| 2018 | -12.91% | -9.95% |
| 2017 | -0.58% | +9.21% |
| 2016 | -25.25% | -3.75% |
| 2015 | +7.89% | -10.43% |
| 2014 | +25.33% | +21.09% |
| 2013 | +100.11% | +86.38% |
| 2012 | +75.47% | +28.96% |
| 2011 | +11.89% | +63.76% |
| 2010 | -16.31% | +25.00% |
| 2009 | -17.08% | +10.33% |
| 2008 | +12.79% | -14.75% |
| 2007 | +45.72% | +15.39% |
| 2006 | +18.70% | +5.24% |
| 2005 | +11.50% | +12.39% |
20-Year Average Return for GILD
8.71%
20-Year Average Return for BIIB
16.09%
24 Months Performance
| Month | GILD | BIIB |
|---|---|---|
| October 2025 | +7.77% | +0.03% |
| September 2025 | -0.83% | +0.32% |
| August 2025 | -0.19% | +0.20% |
| July 2025 | +0.50% | -1.59% |
| June 2025 | +2.52% | -4.23% |
| May 2025 | +6.62% | +7.33% |
| April 2025 | -4.26% | -8.29% |
| March 2025 | -2.72% | -3.44% |
| February 2025 | +16.19% | -1.29% |
| January 2025 | +5.79% | -4.05% |
| December 2024 | -0.93% | -6.89% |
| November 2024 | +3.43% | -7.57% |
| October 2024 | +5.81% | -8.81% |
| September 2024 | +6.18% | -5.37% |
| August 2024 | +3.28% | -2.82% |
| July 2024 | +10.81% | -8.01% |
| June 2024 | +9.49% | +0.88% |
| May 2024 | -1.89% | +4.08% |
| April 2024 | -10.54% | +0.00% |
| March 2024 | +2.34% | -2.41% |
| February 2024 | -7.75% | -12.44% |
| January 2024 | -5.98% | -7.86% |
| December 2023 | +5.28% | +10.28% |
| November 2023 | -4.48% | -2.31% |
24 Months Average Return for GILD
-2.68%
24 Months Average Return for BIIB
1.93%
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