What if you invested in Amgen in 2005?
AMGN · Healthcare · Data through 2026-06-01
If you invested $1,000 in Amgen in 2005
The same $1,000 in the S&P 500 would be worth $9,342(+834.2%)
The S&P 500 returned $9,342 on the same $1,000. S&P 500 outperformed by $675.
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Compare Amgen to another stock
See how Amgen stacks up since 2005, head to head.
What if Amgen keeps this up?
Project forward at Amgen's 10.5% historical growth rate. See 5-30 year scenarios.
Growth of $1,000
Amgen vs. S&P 500 vs. US Dollar, 2005 to present
Year-by-Year Returns
$1,000 invested in Amgen starting January 2005
| Year | Price | Value | Annual |
|---|---|---|---|
| 2005 | $41.78 | $1,000 | - |
| 2006 | $48.93 | $1,171 | +17.1% |
| 2007 | $47.24 | $1,131 | -3.5% |
| 2008 | $31.28 | $749 | -33.8% |
| 2009 | $36.82 | $881 | +17.7% |
| 2010 | $39.26 | $940 | +6.6% |
| 2011 | $36.98 | $885 | -5.8% |
| 2012 | $46.08 | $1,103 | +24.6% |
| 2013 | $59.08 | $1,414 | +28.2% |
| 2014 | $83.76 | $2,005 | +41.8% |
| 2015 | $109.29 | $2,616 | +30.5% |
| 2016 | $111.83 | $2,676 | +2.3% |
| 2017 | $117.75 | $2,818 | +5.3% |
| 2018 | $143.73 | $3,440 | +22.1% |
| 2019 | $148.80 | $3,561 | +3.5% |
| 2020 | $177.04 | $4,237 | +19% |
| 2021 | $203.31 | $4,866 | +14.8% |
| 2022 | $197.19 | $4,719 | -3% |
| 2023 | $226.04 | $5,410 | +14.6% |
| 2024 | $291.19 | $6,969 | +28.8% |
| 2025 | $272.46 | $6,521 | -6.4% |
| 2026 | $336.98 | $8,065 | +23.7% |
What this return means
Putting $1,000 into Amgen (AMGN) in 2005 returned $8,667. That is a +766.7% gain, a little over 8.7x your money, measured to 2026-06-01.
That is about 10.5% a year compounded, broadly in line with long-run stock market averages. The same $1,000 in an S&P 500 index fund would be about $9,342 over the identical span, so the index came out ahead by roughly $675. The index compounded at about 10.9% a year, a reminder that a single stock can lag a basket of them.
Getting here meant sitting through real volatility. The best single year was 2014 at +41.8%, and the worst was 2008 at -33.8%. At its lowest point the position was down about 36% from an earlier high. These figures use split-adjusted closing prices and exclude dividends, taxes, trading fees, and inflation, so a real after-tax result would differ.
Treat this as history rather than advice. Past performance does not guarantee future results.
What if you invested $100 a month instead?
Most people do not drop a lump sum in on day one. They add a fixed amount every month. Putting $100 into Amgen at the close of every month from January 2005 through June 2026 means 258 buys and $25,800 contributed over about 21.5 years.
$100/month, dollar-cost averaged
$125,737
+387.4% on $25,800 in
Same $25,800, all in at the start
$223,616
+766.7% on $25,800 in
Going all in at the start beat spreading the buys out by $97,880. That is the usual result when a stock trends up: each monthly buy pays a higher price than the last, so the average cost climbs. Averaging in also meant an average buy price of $74.30 per share across the whole stretch, so the monthly buyer never had to time a single low. Neither number counts dividends, taxes, or trading costs.
Illustrative fixed $100/month example, not a recommendation. Figures are computed from AMGN split-adjusted monthly closes through June 2026. Past performance does not guarantee future results.
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For informational and educational purposes only. Not financial advice. Past performance does not guarantee future results. All calculations are based on split-adjusted closing prices from Yahoo Finance and do not account for dividends, taxes, or trading fees. See our methodology and full disclaimer.