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American Superconductor Corporation (AMSC)

American Superconductor Corporation at a glance — key fundamentals, SEC filings, insider buying and selling, and earnings dates.

American Superconductor Corporation (AMSC) is a Industrial - Machinery company based in US with a market capitalization of $2.4B. Revenue grew 34.3% year-over-year and the company generated $18.3M in free cash flow. This page tracks AMSC's SEC filings, insider buying and selling, earnings dates, and key fundamentals in one place.

US · 569 employees · IPO Dec 12, 1991

Valuation

Valuation & price

$55.06 · as of May 17, 2026 · -17.4% vs 52w high

18.1

P/E ratio

Latest-FY diluted EPS

4.28

P/B ratio

Market cap ÷ book equity

—

Dividend yield

Price — last 12 months

$65.54$46.58$27.61Jul 25Dec 25Jul 26Jul 7, 25$40.26Jul 9, 25$39.91Jul 11, 25$39.17Jul 15, 25$40.96Jul 17, 25$41.38Jul 21, 25$42.30Jul 23, 25$42.96Jul 25, 25$43.20Jul 29, 25$43.48Jul 31, 25$56.85Aug 4, 25$55.52Aug 6, 25$54.87Aug 11, 25$52.15Aug 13, 25$54.09Aug 15, 25$53.06Aug 19, 25$48.82Aug 21, 25$48.59Aug 25, 25$49.58Aug 27, 25$52.11Aug 29, 25$49.90Sep 3, 25$48.63Sep 5, 25$48.88Sep 9, 25$49.85Sep 11, 25$54.72Sep 16, 25$56.51Sep 18, 25$64.49Sep 22, 25$64.63Sep 24, 25$59.61Sep 26, 25$58.57Sep 30, 25$59.39Oct 2, 25$59.25Oct 6, 25$60.98Oct 8, 25$60.70Oct 10, 25$56.24Oct 14, 25$65.54Oct 16, 25$63.05Oct 21, 25$59.26Oct 23, 25$56.53Oct 27, 25$57.85Oct 29, 25$63.01Oct 31, 25$59.23Nov 4, 25$56.29Nov 6, 25$36.55Nov 10, 25$36.91Nov 12, 25$35.18Nov 14, 25$33.91Nov 18, 25$31.17Nov 20, 25$29.78Nov 25, 25$30.75Nov 28, 25$31.09Dec 2, 25$30.79Dec 4, 25$33.01Dec 8, 25$32.46Dec 10, 25$33.37Dec 12, 25$31.07Dec 16, 25$31.21Dec 18, 25$30.59Dec 22, 25$31.86Dec 24, 25$31.34Dec 29, 25$29.24Jan 2, 26$31.58Jan 6, 26$30.75Jan 8, 26$30.58Jan 12, 26$30.47Jan 14, 26$31.25Jan 16, 26$32.19Jan 21, 26$31.81Jan 23, 26$33.28Jan 27, 26$32.17Jan 29, 26$31.45Feb 2, 26$30.02Feb 4, 26$27.61Feb 9, 26$28.79Feb 11, 26$34.26Feb 13, 26$34.26Feb 18, 26$34.78Feb 20, 26$34.04Feb 24, 26$33.71Feb 26, 26$34.64Mar 2, 26$33.01Mar 4, 26$31.86Mar 6, 26$27.70Mar 10, 26$29.68Mar 12, 26$29.26Mar 17, 26$31.17Mar 19, 26$30.67Mar 23, 26$30.80Mar 25, 26$33.56Mar 27, 26$33.72Mar 31, 26$33.85Apr 2, 26$32.09Apr 7, 26$31.54Apr 9, 26$36.15Apr 13, 26$37.81Apr 15, 26$37.74Apr 17, 26$39.72Apr 22, 26$48.15Apr 24, 26$49.48Apr 28, 26$47.50Apr 30, 26$53.54May 4, 26$50.30May 6, 26$57.07May 8, 26$55.19May 12, 26$54.51May 14, 26$54.70May 18, 26$50.15May 20, 26$49.22May 22, 26$51.84May 28, 26$51.33Jun 1, 26$51.15Jun 3, 26$46.67Jun 5, 26$42.34Jun 9, 26$40.53Jun 11, 26$39.51Jun 15, 26$41.07Jun 17, 26$40.13Jun 22, 26$45.33Jun 24, 26$40.85Jun 26, 26$39.73Jul 2, 26$36.54
$25.9552-week range$66.68
Loading valuation history…

Fundamentals

Key fundamentals

$2.4B

Market cap

34.3%

Revenue growth (YoY)

30.6%

Gross margin

$18.3M

Free cash flow (USD)

-$136.7M

Net debt

Net cash position

16.1%

Share dilution

1/4

Graham criteria passed

Defensive-investor screen

Industrials

Sector

Trajectory

Long-term trends

Revenue by year

2017 → 2026

FY 2017$75.2MFY 2018$48.4MFY 2019$56.2MFY 2020$63.8MFY 2021$87.1MFY 2022$108.4MFY 2023$106.0MFY 2024$145.6MFY 2025$222.8MFY 2026$299.2M
$75.2M$299.2M

Free cash flow by year

2017 → 2026

FY 2017$-11.9MFY 2018$-27.4MFY 2019$41.8MFY 2020$-20.1MFY 2021$-10.4MFY 2022$-19.9MFY 2023$-23.7MFY 2024$1.2MFY 2025$25.9MFY 2026$18.3M
-$11.9M$18.3M

Gross margin by year

2022 → 2026

FY 202212.4%FY 20238.0%FY 202424.2%FY 202527.8%FY 202630.6%
12.4%30.6%

Value screen

Graham defensive-investor tests

Computing the scorecard — refreshing any stale inputs…

0

Insider buys · 90 days

7

Insider sells · 90 days

Earnings

Last reported: May 27, 2026 (EPS $0.30)

Next expected: not yet scheduled

On the tape

Recent SEC & insider activity

  • Insider sellInsider Sell $151KDambier Laura A. · Director · $150.5KJun 12, 2026Filing
  • Insider sellInsider Sell $604K · 10b5-1 PlanMcGahn Daniel P · Director, Chairman, President and CEO · $603.5KJun 11, 2026Filing
  • Insider sellInsider Sell $254K · 10b5-1 PlanKosiba John W JR · SVP, CFO & Treasurer · $253.6KJun 11, 2026Filing
  • Insider sellInsider Sell $404K · 10b5-1 PlanMcGahn Daniel P · Director, Chairman, President and CEO · $404KJun 10, 2026Filing
  • Insider sellInsider Sell $202K · 10b5-1 PlanKosiba John W JR · SVP, CFO & Treasurer · $202KJun 10, 2026Filing
  • Insider sellInsider Sell $4.3M · 10b5-1 PlanMcGahn Daniel P · Director, Chairman, President and CEO · $4.3MJun 3, 2026Filing
  • Insider sellInsider Sell $1.9M · 10b5-1 PlanKosiba John W JR · SVP, CFO & Treasurer · $1.9MJun 3, 2026Filing
  • 8-K eventExecutive Incentive Plan ApprovedJun 2, 2026Filing
  • 8-K eventEarnings ReleaseMay 27, 2026Filing
  • Annual report10-K FiledMay 27, 2026Filing

Questions

Frequently asked questions

What is American Superconductor Corporation's market cap?

American Superconductor Corporation (AMSC) has a market capitalization of $2.4B.

What is AMSC's P/E ratio?

AMSC trades at a price-to-earnings ratio of 18.1, based on its latest fiscal-year diluted earnings per share and the most recent cached price.

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

AMSC trades at 4.28 times book value per share.

When did American Superconductor Corporation last report earnings?

AMSC last reported earnings on May 27, 2026; the next date is not yet scheduled.

Are insiders buying AMSC stock?

SEC Form 4 filings show no open-market insider buys at American Superconductor Corporation in the last 90 days (7 sells).

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Timeline

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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.