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AMPH
Amphastar Pharmaceuticals, Inc.
stock NASDAQ

At Close

Jul 29, 2026 3:59:53 PM EDT

20.58USD+2.159%(+0.43)321,672

0.00Bid 0.00Ask 0.00Spread

Pre-market

0.00USD-100.000%(-20.15)0

After-hours

Jul 29, 2026 4:37:30 PM EDT

19.44USD-5.550%(-1.14)329

OverviewOptionsHistoricalExchangesShort InterestMore

As of 2026-07-15, there were 4,174,460 shares short with a short interest of 12.71%.

Price

Price

Historical data is split-adjusted.

1) Data from Finra. Finra publishes an updated file every two weeks.

2) Days to Cover (DTC) is also called Short Ratio. This is the Short Position / Average Daily Trading Volume.

.dark-mode .nGGrSl{ color: white; background-color: #333333; border: 2px solid white; }.light-mode .nGGrSl{ color: #333333; background-color: white; border: 2px solid #333333; }AMPHAmphastar Pharmaceuticals, Inc.stock NASDAQ