If you invested $1,000 in BIIB — what it would be worth today
A $1,000 investment in Biogen Inc. (BIIB) in January 2016 would be worth $740 as of July 2026 with dividends reinvested — -2.8% a year. Use the dropdowns above to try any amount, ticker, or starting month back to September 1991.
Over the same period, the same $1,000 would be worth $4,509 in the S&P 500 (SPY) and $7,083 in the Nasdaq-100 (QQQ). BIIB trailed both the S&P 500 and the Nasdaq-100 over that period.
Growth of $1,000 in BIIB since January 2016#
monthlyBiogen Inc. (BIIB). Total return approximated via dividend- and split-adjusted closes (no taxes or fees). Not investment advice.
Growth of $1,000 in BIIB by starting month#
$1,000 invested in BIIB, by starting year#
| Invested in | Worth today | Same in QQQ | Multiple | Annualized |
|---|---|---|---|---|
| 2016 | $740 | $7,083 | 0.7× | -2.8% |
| 2017 | $729 | $5,856 | 0.7× | -3.3% |
| 2018 | $581 | $4,267 | 0.6× | -6.2% |
| 2019 | $606 | $4,263 | 0.6× | -6.5% |
| 2020 | $752 | $3,245 | 0.8× | -4.3% |
| 2021 | $715 | $2,244 | 0.7× | -5.9% |
| 2022 | $895 | $1,935 | 0.9× | -2.5% |
| 2023 | $695 | $2,367 | 0.7× | -9.9% |
| 2024 | $820 | $1,661 | 0.8× | -7.7% |
| 2025 | $1,405 | $1,318 | 1.4× | 25.9% |
Methodology#
Investments are assumed made at the first trading day's close of the chosen year. "Dividends reinvested" uses split- and dividend-adjusted closes (a standard total-return approximation; taxes and fees excluded). "Price-only" uses split-adjusted closes. BIIB data begins September 1991; values as of July 2026 and refresh daily. Past performance does not predict future returns; not investment advice.
See the live BIIB chart and fundamentals on the BIIB quote page or compare with the same investment in SPY.
FAQ
- How much would $1,000 invested in BIIB be worth today?
- A $1,000 investment in Biogen Inc. (BIIB) in January 2016 would be worth about $740 as of July 2026, with dividends reinvested. That works out to about -2.8% a year.
- How far back does the BIIB calculation go?
- BIIB data begins September 1991. You can pick any starting month from then to the present and see what your investment would be worth today.
- Does this include dividends?
- Yes. The default "dividends reinvested" view uses split- and dividend-adjusted closing prices — a standard total-return approximation that excludes taxes and fees. A price-only view (split-adjusted, no dividends) is also available.