Biogen Inc. trailing returns
Biogen Inc.'s 10-year return is -1.4% a year (CAGR) (-13.1% cumulative). How Biogen Inc. (BIIB) has performed over the last day, week, month and year, over 5, 10, 20 and 30 years, and since inception, through October 27, 2026 — price return and dividends side by side, with the worst drop inside each window.
Trailing returns by period#
To 2026-10-27. Price return + dividends = total return. Per year (CAGR) for windows of a year or more, with the cumulative total return beneath. Worst drop: the deepest fall in the price from a high inside the window, and when it bottomed.
| Period | Price | DivsDividends | Total | Worst drop |
|---|---|---|---|---|
| 1 day | +0.2% | +0.0% | +0.2% | — |
| 5 days | +4.0% | +0.0% | +4.0% | -1.2%Oct 23 |
| 1 month | +11.0% | +0.0% | +11.0% | -4.5%Oct 8 |
| YTD | +43.6% | +0.0% | +43.6% | -14.3%Apr 6 |
| 1 year | +68.0% | +0.0% | +68.0% | -14.3%Apr 2026 |
| 5 years | -0.6% | +0.0% | -0.6%-2.8% | -64.4%Apr 2025 |
| 10 years | -1.4% | +0.0% | -1.4%-13.1% | -72.7%Apr 2025 |
| 20 years | +9.1% | +0.0% | +9.1%+474.1% | -76.2%Apr 2025 |
| 30 years | +15.1% | +0.0% | +15.1%+6715.3% | -76.2%Apr 2025 |
| Since inception (1991) | +13.3% | +0.0% | +13.3%+7987.4% | -90.0%Dec 1994 |
Growth of BIIB#
Actual level with dividends reinvested (solid); dashed lines are each window's constant-rate path from start to today.
- 5 years-0.6%/year · -2.8%
- 10 years-1.4%/year · -13.1%
- 20 years+9.1%/year · +474.1%
- 30 years+15.1%/year · +6715.3%
- Since inception (1991)+13.3%/year · +7987.4%
Methodology#
Trailing returns measure from the closest close about N years before the latest close (2026-10-27). Cumulative return is the total change over the window; annualized return is the compound annual growth rate (CAGR), shown for windows of a year or more. Price return is the change in BIIB's closing price; total return reinvests dividends (from its split- and dividend-adjusted closes); the dividends column is the difference between the two. The worst drop is the largest fall in the closing price from a high to a later low inside the window, the way a drawdown is usually quoted. See the year-by-year returns for the calendar breakdown. Past performance does not predict future returns; not investment advice.
FAQ#
- What is Biogen Inc.'s 10-year return?
- Over the last 10 years, Biogen Inc. (BIIB) returned about -1.4% a year annualized (-13.1% cumulative total return).
- What is Biogen Inc.'s 20-year annualized return?
- Over the last 20 years, Biogen Inc. (BIIB) compounded at about +9.1% a year (+474.1% cumulative).
- What is Biogen Inc.'s 30-year annualized return?
- Over the last 30 years, Biogen Inc. (BIIB) compounded at about +15.1% a year (+6715.3% cumulative).
- What is Biogen Inc.'s return since inception?
- Since 1991, Biogen Inc. (BIIB) has compounded at about +13.3% a year — +7987.4% in total.