AMPHhistorical intraday data
ListedAmphastar Pharmaceuticals, Inc.Nasdaq
Amphastar Pharmaceuticals, Inc. (AMPH) is a common stock listed on Nasdaq. The archive holds 4,853 trading days of AMPH, from September 10, 2003 to November 9, 2026, with 14,723,649 trades. There are 745,497 1-minute bars on file.
On file
- First day
- 2003-09-10
- Last day
- 2026-11-09
- Trading days
- 4,853
- Trades
- 14,723,649
- 1-minute bars
- 745,497
- Bars, about
- 11 MB
- Trades, about
- 203 MB
- Quotes, about
- 276 MB
Sizes are approximate: this ticker’s share of the Parquet files.
Trading history
No AMPH data for 2011 to 2013. A gap usually means the symbol belonged to a different company before and after it. The name above is the latest on record.
Sample rows
| Time (ET) | Open | High | Low | Close | Volume | Trades |
|---|---|---|---|---|---|---|
| 09:30 | 28.74 | 28.84 | 28.61 | 28.61 | 14,868 | 28 |
| 09:31 | 28.793 | 28.793 | 28.58 | 28.58 | 500.396154 | 12 |
| 09:32 | 28.748 | 28.748 | 28.748 | 28.748 | 115 | 1 |
| 09:33 | 28.5 | 28.79 | 28.5 | 28.748 | 4,612 | 44 |
| 09:34 | 28.748 | 28.748 | 28.748 | 28.748 | 187.3332 | 5 |
AMPH by year
| Year | Trading days on file | Trades |
|---|---|---|
| 2003 | 77 | 3,455 |
| 2004 | 244 | 11,532 |
| 2005 | 212 | 4,195 |
| 2006 | 233 | 4,906 |
| 2007 | 240 | 17,618 |
| 2008 | 253 | 27,094 |
| 2009 | 252 | 29,068 |
| 2010 | 230 | 30,708 |
| 2014 | 132 | 115,574 |
| 2015 | 252 | 461,154 |
| 2016 | 252 | 725,214 |
| 2017 | 251 | 602,789 |
| 2018 | 251 | 458,276 |
| 2019 | 252 | 578,474 |
| 2020 | 253 | 810,989 |
| 2021 | 252 | 647,166 |
| 2022 | 251 | 1,623,192 |
| 2023 | 250 | 1,792,559 |
| 2024 | 252 | 2,079,548 |
| 2025 | 250 | 2,575,129 |
| 2026 | 214 | 2,125,009 |