Amphastar Pharmaceuticals Inc (AMPH) returns
Amphastar Pharmaceuticals returns over 10 years
$1,000 invested in Amphastar Pharmaceuticals ten years ago was worth $1,549 at the close on October 30, 2026, with dividends reinvested: an average return of 4.5% a year. The same $1,000 in the S&P 500 (SPY) became $4,166.
Total return by period
| Period | Total return | A year, on average | $1,000 became | S&P 500 (SPY) |
|---|---|---|---|---|
| 1 month | +7.4% | — | $1,074 | -0.9% |
| 3 months | +36.0% | — | $1,360 | +2.1% |
| Year to date | +3.5% | — | $1,035 | +11.7% |
| 1 year | +12.4% | — | $1,124 | +12.4% |
| 3 years | -38.6% | -15.0% | $613.55 | +88.5% |
| 5 years | +48.4% | +8.2% | $1,484 | +76.0% |
| 10 years | +54.9% | +4.5% | $1,549 | +316.6% |
Amphastar Pharmaceuticals return by calendar year
| Year | AMPH | S&P 500 (SPY) | Difference |
|---|---|---|---|
| 2026 to date | +3.5% | +11.7% | -8.2% |
| 2025 | -27.9% | +17.7% | -45.6% |
| 2024 | -40.0% | +24.9% | -64.9% |
| 2023 | +120.7% | +26.2% | +94.5% |
| 2022 | +20.3% | -18.2% | +38.5% |
| 2021 | +15.8% | +28.7% | -12.9% |
| 2020 | +4.3% | +18.4% | -14.1% |
| 2019 | -3.1% | +31.2% | -34.3% |
| 2018 | +3.4% | -4.6% | +8.0% |
| 2017 | +4.5% | +21.7% | -17.2% |
| 2016 | +29.4% | +12.0% | +17.4% |
Past returns do not predict future returns. Returns are computed from our daily closes, adjusted for splits and with dividends reinvested on their ex-dates; taxes and trading costs are left out.
See also: AMPH financials · AMPH valuation
No forecast, no recommendation. This page describes Amphastar Pharmaceuticals Inc from published data; it is not advice to buy, sell or hold any security.
Figures as of the close on Oct 30, 2026 unless a row says otherwise. Prices are split adjusted; returns include dividends reinvested. Data may be delayed. See the disclaimer and how TrendArc works.