Amphastar Pharmaceuticals share price today

Amphastar Pharmaceuticals, Inc.'s share price was $28.02 at the close on 4 November 2026. It has been stalling near its high for 10 weeks. That is 25.8% above its average price over the last 200 trading days.

A share price tends to move through four phases: moving sideways (stage 1), rising (stage 2), stalling near a high (stage 3) and falling (stage 4). Today Amphastar Pharmaceuticals, Inc. is in stage 3. The phase helps read everything below.

In the last 52 weeks it traded between $17 and $29, and at that close it sat 90% of the way up from that low. Over the past 13 weeks it has done better than the S&P 500, and it has stayed ahead for 14 weeks in a row.

Over the last 10 years the share price moved +67% while the S&P 500 moved +261%, so it is behind the index over that whole period. The chart above shows the 13-week comparison for every week.

This page treats a rise as over when the price closes below its 200-day average on two Fridays in a row.

Amphastar Pharmaceuticals, Inc. pays no dividend. In the last 12 reported quarters it declared no dividend per share, so there is no payout history to chart and no yield to show. Companies like this usually keep their earnings in the business, so the cash-flow sections show where that cash goes.

Amphastar Pharmaceuticals is not in the Nasdaq 100, the S&P 500 or the Dow Jones 30, and is not on the US tech stocks list.

Amphastar Pharmaceuticals, Inc. earned $30.3 M of net profit in the Jun 2026 quarter, −2.2% on the same quarter a year earlier. Full-year FY25 profit was $98.1 M. Over 4 years profit has grown 12.1% a year on average. That is 16.5% of the quarter's revenue. The same quarter a year earlier earned $31.0 M.

Net profit is what is left after every cost, interest and tax. Earnings per share, dividends and book value all grow from it.

For the full year, FY25 profit was $98.1 M (−38.5% on the year before).

Why profit moved: revenue changed +5.4% on a year earlier and the margin moved −2.6 percentage points. Sales did the work while the margin got thinner.

On average over the last four quarters, profit changed −42.4% and revenue +1.1%. Profit is growing slower than sales: rising costs are taking part of the growth.

Amphastar Pharmaceuticals, Inc. reported $184 M of revenue in the Jun 2026 quarter, +5.4% on the same quarter a year earlier. That is the 2nd quarter in a row with growth on the year before. Over 4 years it has grown 13.2% a year on average. The last full year, FY25, came in at $720 M.

Revenue is everything the company billed its customers in the period.

The last four reported quarters add to $730 M.

FY25 revenue was $720 M, −1.7% on the year before.

Recent pace: the last four quarters grew +1.1% on average, against 13.2% a year over the longer run, so this year is growing slower than its own long-run rate.

Is growth speeding up? Revenue over the last 12 months grew +1.0%, against +1.2% a year over the last 8 quarters (stabilising); profit over the last 12 months grew −41.7%, against −31.3% a year (rolling over).

Amphastar Pharmaceuticals, Inc.'s operating margin was 21.6% in the Jun 2026 quarter, 2.6 percentage points lower than the same quarter a year ago. Across 5 years it has been between 16.4% and 30.6%. The latest quarter is within that range.

Operating margin is what is left from every $100 of sales after the costs of running the business, before interest and tax. It shows pricing power and cost control.

Why the margin moved: operating margin changed −2.6 percentage points on the year while gross margin changed +1.2 points. So the drop came mostly from costs below the gross margin, such as staff and overheads, measured against sales.

Over the last 3 years, 140% of Amphastar Pharmaceuticals, Inc.'s reported profit came in as cash from its operations, so the profit is backed by cash. In FY25 it brought in $156 M of operating cash against $98.1 M of profit. After $34.9 M of spending on assets, $121 M was left over as free cash.

The profit and loss account shows what was earned. The cash-flow statement shows the cash that actually came in. Comparing operating cash flow with profit is one of the best checks that a profit is real.

Cash-flow figures here are yearly, because quarterly cash statements are not published, so this section changes once a year.

Why: the cash figure is clear, but the day counts behind it are not in our data, so we show it without guessing the reason.

What to look at next: the main use of cash is spending on assets. The next section checks what that spending is building.

Amphastar Pharmaceuticals, Inc. does not report the customer, stock and supplier day counts a cash cycle needs, so this section looks at its spending on assets instead. It spent $114 M on assets over the last 3 years. Averaged over those years that is 5.3% of FY25 revenue a year.

Working capital is the cash tied up between paying suppliers and getting paid. Debtor days: how long customers take to pay. Inventory days: how long stock sits. The cash cycle: the whole loop, in days of sales.

Nothing is estimated in place of the missing day counts, so no cash-cycle chart is drawn.

Spending on assets: $114 M over the last 3 years.

In short: the cash is going into new capacity, not getting stuck in the daily cycle. The question is whether the new capacity earns.

Amphastar Pharmaceuticals, Inc.'s P/E is 16.6×, in the middle of its own history: higher than 58% of past readings. Its usual P/E (the middle reading) is 15.3×, over 4.6 years of weekly prices. This compares the share price with the company’s own past. It does not say what the business is worth.

P/E is the share price divided by a year's profit per share: how many dollars the market pays for each dollar of yearly profit.

Why the multiple is where it is: over the past year earnings per share moved −33.7% while the price moved +16.6%. The price did better than earnings, which pushed the multiple up within its own range.

Where the price move came from: over 3 years the price moved −15.6% a year; about −12.9% a year came from earnings growth and about −2.7 percentage points from the multiple (the market paying less). The split is approximate (price return minus earnings growth). It shows how much of the move came from the market paying a different multiple.

In short: the multiple is about average against its own past, so the earnings trend underneath matters more than the multiple.

Amphastar Pharmaceuticals, Inc.'s business is getting worse. Profit and EPS growth are shrinking: profit growth is −41.7% in the latest quarter, against +75.2% at its best in 12 quarters, with ROCE falling at 9.4%. This is based on 12 quarters of 4 measures.

Every business is somewhere on a path of getting better or worse, and this section names where. The last 12 quarters of growth in revenue, profit and earnings per share, plus the return the business earns on its capital, are read as lines. Getting worse: the lines are falling. Turning around: a low point has just formed and the last few quarters are rising from it. Getting better: the rise from the low has lasted. Growing steadily: steady growth with healthy returns. Slowing from a peak: still high, but slowing. When the lines disagree the result is mixed; too little history means no reading. CAGR (compound annual growth rate) is the steady yearly rate that would turn the starting value into the latest one. It is the fairest way to compare growth over different periods. If the 1-year figure is much bigger than the 10-year one, recent growth is running faster than the long-run trend. A dash means there is no figure for that period, or the starting year was a loss, where a growth rate means nothing.

Why it matters: falling lines mean any ratio below that looks low should be read with that direction in mind.

Compound annual growth rate (%)

Compound annual growth rate over each period, %. Revenue, profit and EPS come from yearly figures; the stock price row is price growth over the same periods. A dash means no figure for that period, or the starting year was a loss.