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Amphastar Pharmaceuticals, Inc. (AMPH)

Amphastar Pharmaceuticals, Inc. at a glance — key fundamentals, SEC filings, insider buying and selling, and earnings dates.

Amphastar Pharmaceuticals, Inc. (AMPH) is a Drug Manufacturers - Specialty & Generic company based in US with a market capitalization of $826.3M. Revenue declined 1.6% year-over-year and the company generated $121.2M in free cash flow. This page tracks AMPH's SEC filings, insider buying and selling, earnings dates, and key fundamentals in one place.

US · 2.03K employees · IPO Jun 25, 2014

Valuation

Valuation & price

$16.87 · as of May 17, 2026 · -45.2% vs 52w high

8.3

P/E ratio

Latest-FY diluted EPS

1.05

P/B ratio

Market cap ÷ book equity

—

Dividend yield

Price — last 12 months

$30.62$23.91$17.20Jul 25Dec 25Jul 26Jul 7, 25$22.86Jul 9, 25$22.44Jul 11, 25$21.66Jul 15, 25$21.18Jul 17, 25$21.70Jul 21, 25$21.19Jul 23, 25$22.63Jul 25, 25$22.37Jul 29, 25$21.67Jul 31, 25$20.95Aug 4, 25$21.40Aug 6, 25$20.82Aug 11, 25$27.36Aug 13, 25$30.48Aug 15, 25$29.83Aug 19, 25$30.33Aug 21, 25$29.66Aug 25, 25$29.83Aug 27, 25$30.49Aug 29, 25$30.62Sep 3, 25$29.39Sep 5, 25$29.42Sep 9, 25$29.33Sep 11, 25$28.68Sep 16, 25$27.00Sep 18, 25$27.44Sep 22, 25$27.89Sep 24, 25$26.87Sep 26, 25$26.85Sep 30, 25$26.65Oct 2, 25$26.52Oct 6, 25$26.58Oct 8, 25$25.98Oct 10, 25$23.63Oct 14, 25$23.86Oct 16, 25$23.22Oct 21, 25$24.26Oct 23, 25$24.72Oct 27, 25$24.04Oct 29, 25$24.24Oct 31, 25$25.50Nov 4, 25$25.26Nov 6, 25$24.23Nov 10, 25$26.12Nov 12, 25$27.83Nov 14, 25$26.06Nov 18, 25$25.90Nov 20, 25$25.36Nov 25, 25$27.69Nov 28, 25$27.70Dec 2, 25$26.67Dec 4, 25$27.15Dec 8, 25$26.01Dec 10, 25$25.71Dec 12, 25$25.27Dec 16, 25$25.61Dec 18, 25$26.50Dec 22, 25$27.32Dec 24, 25$26.81Dec 29, 25$26.79Jan 2, 26$26.46Jan 6, 26$27.62Jan 8, 26$27.74Jan 12, 26$29.40Jan 14, 26$27.76Jan 16, 26$26.07Jan 21, 26$26.22Jan 23, 26$25.92Jan 27, 26$26.25Jan 29, 26$26.15Feb 2, 26$27.92Feb 4, 26$28.61Feb 9, 26$28.61Feb 11, 26$28.59Feb 13, 26$28.50Feb 18, 26$28.66Feb 20, 26$28.53Feb 24, 26$27.67Feb 26, 26$26.49Mar 2, 26$21.01Mar 4, 26$19.96Mar 6, 26$19.34Mar 10, 26$18.91Mar 12, 26$18.18Mar 17, 26$19.51Mar 19, 26$19.54Mar 23, 26$19.23Mar 25, 26$19.57Mar 27, 26$19.01Mar 31, 26$19.59Apr 2, 26$20.45Apr 7, 26$20.58Apr 9, 26$20.87Apr 13, 26$21.36Apr 15, 26$21.68Apr 17, 26$22.88Apr 22, 26$20.99Apr 24, 26$21.41Apr 28, 26$21.82Apr 30, 26$21.96May 4, 26$22.74May 6, 26$23.90May 8, 26$19.00May 12, 26$17.50May 14, 26$17.30May 18, 26$17.20May 20, 26$18.08May 22, 26$18.41May 28, 26$19.30Jun 1, 26$18.42Jun 3, 26$18.12Jun 5, 26$19.74Jun 9, 26$20.16Jun 11, 26$20.53Jun 15, 26$19.71Jun 17, 26$19.41Jun 22, 26$18.33Jun 24, 26$21.02Jun 26, 26$21.78Jul 2, 26$19.64
$16.8752-week range$30.81
Loading valuation history…

Fundamentals

Key fundamentals

$826.3M

Market cap

-1.6%

Revenue growth (YoY)

49.5%

Gross margin

$121.2M

Free cash flow (USD)

$373.2M

Net debt

-3.5%

Share dilution

4/5

Graham criteria passed

Defensive-investor screen

Healthcare

Sector

Trajectory

Long-term trends

Revenue by year

2016 → 2025

FY 2016$255.2MFY 2017$240.2MFY 2018$294.7MFY 2019$322.4MFY 2020$349.8MFY 2021$437.8MFY 2022$499.0MFY 2023$644.4MFY 2024$732.0MFY 2025$719.9M
$255.2M$719.9M

Free cash flow by year

2016 → 2025

FY 2016$17.2MFY 2017$4.1MFY 2018$-8.6MFY 2019$207.0KFY 2020$23.4MFY 2021$70.5MFY 2022$65.1MFY 2023$145.3MFY 2024$172.3MFY 2025$121.2M
$17.2M$121.2M

Gross margin by year

2021 → 2025

FY 202145.6%FY 202249.9%FY 202354.5%FY 202451.1%FY 202549.5%
45.6%49.5%

Value screen

Graham defensive-investor tests

Computing the scorecard — refreshing any stale inputs…

0

Insider buys · 90 days

0

Insider sells · 90 days

Earnings

Last report: 10-Q filed May 7, 2026

Next expected: not yet scheduled

On the tape

Recent SEC & insider activity

  • 8-K eventAnnual Meeting ResultsJun 3, 2026Filing
  • 8-K eventEarnings ReleaseMay 7, 2026Filing
  • Quarterly report10-Q FiledMay 7, 2026Filing

Questions

Frequently asked questions

What is Amphastar Pharmaceuticals, Inc.'s market cap?

Amphastar Pharmaceuticals, Inc. (AMPH) has a market capitalization of $826.3M.

What is AMPH's P/E ratio?

AMPH trades at a price-to-earnings ratio of 8.3, based on its latest fiscal-year diluted earnings per share and the most recent cached price.

What is AMPH's price-to-book (P/B) ratio?

AMPH trades at 1.05 times book value per share.

Are insiders buying AMPH stock?

SEC Form 4 filings show no open-market insider buys at Amphastar Pharmaceuticals, Inc. in the last 90 days (0 sells).

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Timeline

Every filing, insider trade & earnings on a price-anchored timeline

Filing Analyzer

Search the actual 10-K / 10-Q text with AI research angles

News

Latest press coverage in one feed

Data: SEC EDGAR filings and cached fundamental data; prices and ratios use the most recent cached quote and statements (may lag by up to a day). Educational and research purposes only. Not investment advice.