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 (September 2005)
$46.44
Stock Price (August 2025)
$112.76
10-Year Growth
48.95%
20-Year Growth
313.46%
Market Cap (August 2025)
$140.17 Billion
BIIB
Stock Price (September 2005)
$38.80
Stock Price (August 2025)
$132.50
10-Year Growth
-71.51%
20-Year Growth
159.46%
Market Cap (August 2025)
$19.39 Billion
20-Year Performance Chart
Interactive visualization of GILD vs BIIB stock performance (2005-2025)
20-Year Performance Data
| Year | GILD | BIIB |
|---|---|---|
| 2025 | +24.70% | -11.85% |
| 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 | +11.26% | +17.73% |
20-Year Average Return for GILD
7.97%
20-Year Average Return for BIIB
15.67%
24 Months Performance
| Month | GILD | BIIB |
|---|---|---|
| August 2025 | +0.19% | -0.20% |
| July 2025 | -0.50% | +1.62% |
| June 2025 | -2.46% | +4.42% |
| May 2025 | -6.20% | -6.83% |
| April 2025 | +4.45% | +9.04% |
| March 2025 | +2.79% | +3.56% |
| February 2025 | -13.94% | +1.31% |
| January 2025 | -5.47% | +4.22% |
| December 2024 | +0.94% | +7.40% |
| November 2024 | -3.32% | +8.19% |
| October 2024 | -5.49% | +9.66% |
| September 2024 | -5.82% | +5.67% |
| August 2024 | -3.18% | +2.90% |
| July 2024 | -9.76% | +8.71% |
| June 2024 | -8.67% | -0.87% |
| May 2024 | +1.93% | -3.92% |
| April 2024 | +11.78% | +0.00% |
| March 2024 | -2.28% | +2.47% |
| February 2024 | +8.41% | +14.21% |
| January 2024 | +6.36% | +8.53% |
| December 2023 | -5.01% | -9.32% |
| November 2023 | +4.69% | +2.37% |
| October 2023 | -5.65% | +6.45% |
| September 2023 | +0.00% | +0.00% |
24 Months Average Return for GILD
3.32%
24 Months Average Return for BIIB
-1.51%
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