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Amphastar Pharmaceuticals, Inc. (AMPH) stock analysis

AMPHNasdaqPharmaceutical PreparationsFiscal year ends December 31
Financials through Q3 FY2026, quarter ended Sep 30, 2026Last filing: 10-Q on Nov 5, 2026Score 12/3030% below fair value
$29.37+0.50 (+1.73%)

Close on Nov 13, 2026Market cap $1.25BP/E 13.3Yield –

StockData Score

Prices as of Nov 13, 2026How the score works

Value5Growth1Performance3Health3Dividend0

Mixed12 of 30 checks passed

Amphastar Pharmaceuticals passes 12 of the 30 checks behind our score; 7 could not be run for lack of data and count as not passed. Each dot in the shape is one check — hover it for the numbers.

Valuation
5/6
Growth
1/6
Past performance
3/6
Financial health
3/6
Dividend
0/6

What stands out

  • Margin of safety over 20%

    The price is 30.2% below fair value, more than the 20% cushion we look for.

  • Trading below fair value

    The share price of $29.37 is below our fair value estimate of $42.05.

  • Earnings grew over 5 years

    Net income grew 134% a year on average over the last five fiscal years.

  • Revenue growing 10%+ a year

    Revenue grew 13.0% a year over the last three fiscal years.

What to watch

  • Return on capital under 10%

    Return on invested capital was 9.3%, below the 10% that usually covers the cost of capital.

  • High debt

    Debt is 75.3% of shareholders' equity, above the 40% we consider low.

  • EPS growing under 10% a year

    Diluted EPS grew 5.3% a year over the last three fiscal years.

  • Earnings growth not accelerating

    Net income grew -11.3% over the last twelve months, against a 5-year average of 134% a year.

Valuation5/6
  • P/E below its 5-year median

    Amphastar Pharmaceuticals's P/E of 13.3 is below its own 5-year median of 15.8.

  • P/E below the industry

    Amphastar Pharmaceuticals's P/E of 13.3 is below the Drugs median of 25.0.

  • EV/EBITDA above its 5-year median

    Amphastar Pharmaceuticals's EV/EBITDA of 11.7 is above its 5-year median of 11.5.

  • P/B below the industry

    Amphastar Pharmaceuticals's price-to-book of 1.53 is below the Drugs median of 2.09.

  • Trading below fair value

    The share price of $29.37 is below our fair value estimate of $42.05.

  • Margin of safety over 20%

    The price is 30.2% below fair value, more than the 20% cushion we look for.

Growth1/6
  • Revenue growing 10%+ a year

    Revenue grew 13.0% a year over the last three fiscal years.

  • EPS growing under 10% a year

    Diluted EPS grew 5.3% a year over the last three fiscal years.

  • Earnings growth not accelerating

    Net income grew -11.3% over the last twelve months, against a 5-year average of 134% a year.

  • Growing slower than the industry

    Revenue grew 3.1% over the last twelve months; the Drugs median is 7.7%.

  • Company guidance

    No outlook found in earnings releases from the last twelve months.

  • Gross margin slipping

    Gross margin was 46.8% over the last twelve months, against 49.4% a year earlier.

Past performance3/6
  • Return on equity

    Needs positive equity and five years of results.

  • Return on capital under 10%

    Return on invested capital was 9.3%, below the 10% that usually covers the cost of capital.

  • Return on equity above the industry

    Amphastar Pharmaceuticals's return on equity of 12.4% is above the Drugs median of -57.0%.

  • Earnings grew over 5 years

    Net income grew 134% a year on average over the last five fiscal years.

  • Net margin below its 5-year average

    Net margin was 13.3% over the last twelve months, against a 5-year average of 17.9%.

  • Net margin above the industry

    Amphastar Pharmaceuticals's net margin of 13.3% is above the Drugs median of -53.5%.

Financial health3/6
  • High debt

    Debt is 75.3% of shareholders' equity, above the 40% we consider low.

  • Debt rising against equity

    Debt to equity rose from 11.5% five years ago to 75.3%.

  • Debt covered by cash flow

    Operating cash flow over the last twelve months equals 28.6% of total debt.

  • Interest well covered

    Operating income covers interest expense 5.3 times.

  • Short-term assets cover short-term debts

    Current assets are 3.32 times current liabilities.

  • Bankruptcy risk in the grey zone

    The Altman Z-score is 2.44; above 3 is the safe zone and below 1.8 the distress zone.

Dividend0/6
  • No dividend

    Amphastar Pharmaceuticals has not paid a dividend in the last twelve months.

  • Yield against Treasuries

    No dividend.

  • Yield against the market

    No dividend.

  • Dividend stability

    No dividend.

  • Earnings cover

    No dividend.

  • Cash-flow cover

    No dividend.

Scores of similar companies

Our estimate per share

$42.05

The share price is 30% below this estimate.

20%+ below
Near fair value
20%+ above
$29.37Price$42.05Fair value
MethodMultiple usedOwn 5Y medianIndustry medianValue per shareWeight
P/E20.4×15.8×25.0×$44.8340%
EV/EBITDA14.4×11.5×17.4×$38.4435%
P/B2.1×–2.1×$39.9710%
Earnings power8.0% cost of equity––$44.4615%
Fair value$42.05100%

Valuation over time

Using the earnings and balance sheet published at each date, not today's.

  • P/E at month end
  • Own 5-year median 15.8
  • Drugs median 25.0

An estimate from reported numbers and market multiples, not a price target or investment advice. It can be far off for companies whose profits are about to change sharply.

Market risk

From the past year of daily prices.

Liquidity

Medium risk

Average value traded per day
$12.29M
Value traded per 1% price move
$7.05M

Downside

High risk

Typical loss in a bad month
33.2%
Volatility (annualized)
51%
Sharpe ratio, 1 year
0.02
Beta to the S&P 500 (5Y)
0.57

Typical bad-month loss, week by week

25%: high

Margins

Share of revenue, fiscal years 2011 to 2025

Gross margin

49.5%+8.5 pts over 5 years

Operating margin

19.5%+16.4 pts over 5 years

Net margin

13.6%+13.2 pts over 5 years

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