What if you'd held AMGN?
A $1,000 investment in Amgen Inc. (AMGN) at the month-end close of 1983-06 would be worth $2.43M at the close of 2026-08 — +243222.3% total return, dividends reinvested. The same $1,000 in the S&P 500 would be worth $45,979.
Your scenario
Result
If you'd bought $1,000 at the start of each year
Value of $1,000 invested on January 1 of each year, held to 2026-08, dividends included. Click any year for the full story.
Every year, $1,000 from 1983
| Year | Value of $1,000 | Year return |
|---|---|---|
| 1983 | $1,000 | — |
| 1984 | $689 | -31.1% |
| 1985 | $1,862 | +170.1% |
| 1986 | $3,035 | +63.0% |
| 1987 | $4,276 | +40.9% |
| 1988 | $4,655 | +8.9% |
| 1989 | $6,758 | +45.2% |
| 1990 | $17,172 | +154.1% |
| 1991 | $62,688 | +265.1% |
| 1992 | $58,447 | -6.8% |
| 1993 | $40,964 | -29.9% |
| 1994 | $48,826 | +19.2% |
| 1995 | $98,273 | +101.3% |
| 1996 | $89,997 | -8.4% |
| 1997 | $89,584 | -0.5% |
| 1998 | $173,064 | +93.2% |
| 1999 | $397,644 | +129.8% |
| 2000 | $423,299 | +6.5% |
| 2001 | $373,662 | -11.7% |
| 2002 | $320,036 | -14.4% |
| 2003 | $409,081 | +27.8% |
| 2004 | $424,705 | +3.8% |
| 2005 | $522,093 | +22.9% |
| 2006 | $452,247 | -13.4% |
| 2007 | $307,457 | -32.0% |
| 2008 | $382,334 | +24.4% |
| 2009 | $374,522 | -2.0% |
| 2010 | $363,465 | -3.0% |
| 2011 | $429,520 | +18.2% |
| 2012 | $587,715 | +36.8% |
| 2013 | $792,220 | +34.8% |
| 2014 | $1.13M | +42.3% |
| 2015 | $1.17M | +4.0% |
| 2016 | $1.08M | -7.6% |
| 2017 | $1.32M | +22.3% |
| 2018 | $1.53M | +15.2% |
| 2019 | $1.95M | +27.6% |
| 2020 | $1.91M | -2.0% |
| 2021 | $1.93M | +0.9% |
| 2022 | $2.32M | +20.4% |
| 2023 | $2.63M | +13.5% |
| 2024 | $2.45M | -6.8% |
| 2025 | $3.18M | +29.7% |
| 2026 | $4.36M | +37.1% |
Best and worst month-end to buy
The best single month-end close to have bought AMGN was 1984-11 ($0.06): $1,000 then is $7.23M today. The worst was 2026-08 ($442): $1,000 then is $1,000.
FAQ
What would $1,000 in AMGN be worth today?
A $1,000 investment in Amgen Inc. (AMGN) at the start of 1983 would be worth about $2.43M today, a total return of +243222.3%. Dividends are reinvested in these figures.
What were the best and worst years for AMGN?
Amgen Inc. (AMGN)'s strongest calendar year since 1983 was 1991, a +265.1% return — $1,000 held through that year became about $3,651 by year-end. Its weakest year was 2007, at -32.0%.
Does the calculator include dividends and splits?
Yes where available. Prices are adjusted for both stock splits and reinvested dividends (total return), the same measure brokerages use.
How much would $100 per month in AMGN have grown?
Investing $100 at the end of every month since 1983-06 would have grown to about $21.52M on $51,900 invested.
Did AMGN beat the S&P 500?
Over the same period, $1,000 in the S&P 500 index would be worth $45,979. AMGN beat the S&P 500 by +5192.0% in total return.
Is this investment advice?
No. What If I'd Held is an entertainment and education tool. Every number is a historical calculation, not a prediction, and past performance never guarantees future results.
Methodology
Amgen Inc. (AMGN) historical total-return data from 1983-06 to 2026-08, reduced to month-end closes for the tables above.
Returns use adjusted close prices from Yahoo Finance historical data — adjusted for stock splits and reinvested dividends — the same convention used by major brokerages. A "year" scenario invests $1,000 at the prior December's month-end close and values it at the latest available month-end close. Non-USD amounts are converted at historical month-end exchange rates (Yahoo Finance): to USD on the buy date and back to your currency at the latest rate, so the return reflects the currency move as well as the asset.
Month-end resolution means intra-month extremes are not captured in tables; the calculator uses exact trading-day closes where daily data is available. Figures ignore taxes, fees, and the currency effects of non-USD listings. History is not a forecast. What If I'd Held is entertainment, not investment advice.
What if you'd held…
Data: adjusted close prices via Yahoo Finance. As of 2026-08. Not financial advice.