Nasdaq · AMSC · stock
American Superconductor Corp. /De/ (AMSC) stock price history
Every Nasdaq trading session of American Superconductor Corp. /De/ from Dec 12, 1991 to Sep 28, 2026: 8,759 daily bars, adjusted for splits and dividends, with minute bars from Jul 13, 2026 forward. The full series is served by the API: a free key covers the last year, paid plans the whole history and minute bars.
AMSC adjusted close, 1991 to 2026
- $692.50
- All time high, 2000
- $70.49
- 52 week high, $24.87 low
- 8,759
- Daily sessions since 1991
Last updated Sep 28, 2026, the last stored session. Refreshes after each trading day. Full 1991 to 2026 series and minute bars.
AMSC key facts
- American Superconductor Corp. /De/ (AMSC) closed at $29.29 on Sep 28, 2026 on Nasdaq.
- AMSC's all time high close is $692.50, set on Feb 28, 2000; its all time low close is $2.97 on Aug 8, 2017.
- AMSC's 52 week range is $24.87 to $70.49.
- AMSC returned -50.0% over the year to Sep 28, 2026 and +105.3% over five years.
- Over ten years AMSC returned +315%, +15.3% a year compounded.
- AMSC's deepest drawdown was -99.6% from Feb 28, 2000 to Aug 8, 2017.
- DataCedar holds 8,759 daily sessions of AMSC history from Dec 12, 1991 and minute bars from Jul 13, 2026, adjusted for splits and dividends, served by the API under a key.
AMSC price chart, 1991 to 2026
AMSC returns
Price return from the last close on or before the window start to Sep 28, 2026, on adjusted closes.
| Period | Return |
|---|---|
| 1 month | +2.8% |
| 3 months | -26.3% |
| 6 months | -13.1% |
| Year to date | +1.2% |
| 1 year | -50.0% |
| 3 years | +290.5% |
| 5 years | +105.3% |
| 10 years | +314.9% |
| Since Dec 12, 1991 | -74.5% |
| Compound annual growth, 34.8 years | -3.9% |
AMSC records
Measured on the stored closes; every figure is reproducible from the API series.
- All time high close
- $692.50 on Feb 28, 2000
- All time low close
- $2.97 on Aug 8, 2017
- 52 week high
- $70.49 on Oct 15, 2025
- 52 week low
- $24.87 on Feb 5, 2026
- Deepest drawdown
- -99.6% from Feb 28, 2000 to Aug 8, 2017, not yet recovered
- Best single session
- +60.0% on Aug 1, 2023
- Worst single session
- -41.8% on Apr 6, 2011
- Volatility, 1 year annualised
- 85.9%
- Sessions closing higher, 1 year
- 50%
- Best calendar year
- 2003, +360%
- Worst calendar year
- 2011, -87%
AMSC price history by year
Open is the first session's open, high and low span the year, close is the last session's close, and the return is close over the previous year's close. 1991 starts on Dec 12, 1991; 2026 runs to Sep 28, 2026.
| Year | Open | High | Low | Close | Return | Volume | Sessions |
|---|---|---|---|---|---|---|---|
| 2026 | $29.75 | $60.18 | $24.87 | $29.29 | +1.8% | 191.6M | 185 |
| 2025 | $25.25 | $70.49 | $13.98 | $28.78 | +16.8% | 265.5M | 250 |
| 2024 | $10.90 | $38.02 | $9.37 | $24.63 | +121.1% | 272.2M | 252 |
| 2023 | $3.73 | $17.37 | $3.53 | $11.14 | +202.7% | 225.3M | 250 |
| 2022 | $10.83 | $11.37 | $3.20 | $3.68 | -66.2% | 70.5M | 251 |
| 2021 | $23.46 | $31.78 | $10.20 | $10.88 | -53.5% | 91.5M | 252 |
| 2020 | $7.94 | $26.44 | $4.40 | $23.42 | +198.3% | 74.5M | 253 |
| 2019 | $11.02 | $16.44 | $7.24 | $7.85 | -29.6% | 70.4M | 252 |
| 2018 | $3.70 | $12.50 | $3.62 | $11.15 | +207.2% | 49.6M | 251 |
| 2017 | $7.33 | $7.82 | $2.89 | $3.63 | -50.7% | 36.5M | 251 |
| 2016 | $6.24 | $12.50 | $5.28 | $7.37 | +15.7% | 22.6M | 252 |
| 2015 | $7.50 | $10.89 | $3.26 | $6.37 | -13.9% | 22M | 252 |
| 2014 | $16.20 | $26.80 | $7.00 | $7.40 | -54.9% | 22.7M | 252 |
| 2013 | $27.40 | $33.40 | $13.70 | $16.40 | -37.4% | 13.7M | 252 |
| 2012 | $38.00 | $60.50 | $24.00 | $26.20 | -29.0% | 12.6M | 250 |
| 2011 | $288.10 | $304.20 | $32.10 | $36.90 | -87.1% | 37.3M | 252 |
| 2010 | $415.50 | $439.50 | $243.50 | $285.90 | -30.1% | 22.7M | 252 |
| 2009 | $163.50 | $434.10 | $116.60 | $409.00 | +150.8% | 22.1M | 252 |
| 2008 | $274.60 | $475.30 | $82.20 | $163.10 | -40.3% | 25.6M | 253 |
| 2007 | $98.60 | $327.40 | $92.00 | $273.40 | +178.7% | 13.5M | 251 |
| 2006 | $81.90 | $118.90 | $67.30 | $98.10 | +24.7% | 6.2M | 251 |
| 2005 | $148.60 | $149.80 | $69.10 | $78.70 | -47.1% | 6.9M | 252 |
| 2004 | $138.60 | $199.50 | $90.10 | $148.90 | +7.4% | 5.2M | 252 |
| 2003 | $32.70 | $146.70 | $30.20 | $138.60 | +360.5% | 6.4M | 252 |
| 2002 | $122.00 | $135.80 | $20.90 | $30.10 | -75.4% | 2.6M | 252 |
| 2001 | $293.75 | $348.75 | $83.50 | $122.60 | -57.1% | 6.4M | 248 |
| 2000 | $286.25 | $751.25 | $196.25 | $285.63 | +2.0% | 10.1M | 252 |
| 1999 | $105.00 | $288.75 | $83.75 | $280.00 | +173.2% | 1.9M | 252 |
| 1998 | $85.00 | $182.50 | $61.25 | $102.50 | +20.6% | 2.2M | 252 |
| 1997 | $106.25 | $147.50 | $77.50 | $85.00 | -20.0% | 974.4K | 253 |
| 1996 | $150.00 | $160.00 | $97.50 | $106.25 | -26.7% | 871.4K | 254 |
| 1995 | $240.00 | $247.50 | $102.50 | $145.00 | -41.4% | 1M | 252 |
| 1994 | $240.00 | $261.67 | $163.33 | $247.50 | +3.1% | 1.2M | 252 |
| 1993 | $131.67 | $240.00 | $118.33 | $240.00 | +80.0% | 957.3K | 253 |
| 1992 | $136.67 | $188.33 | $56.67 | $133.33 | -4.8% | 1.1M | 254 |
| 1991 | $85.83 | $140.00 | $85.83 | $140.00 | n/a | 117.5K | 13 |
AMSC monthly closes, last 12 months
| Month | Month end close | Change |
|---|---|---|
| September 2026 | $29.29 | +2.0% |
| August 2026 | $28.71 | -2.2% |
| July 2026 | $29.37 | -29.2% |
| June 2026 | $41.51 | -18.5% |
| May 2026 | $50.94 | -4.9% |
| April 2026 | $53.54 | +58.2% |
| March 2026 | $33.85 | +3.9% |
| February 2026 | $32.58 | +8.9% |
| January 2026 | $29.92 | +4.0% |
| December 2025 | $28.78 | -7.4% |
| November 2025 | $31.09 | -47.5% |
| October 2025 | $59.23 | -0.3% |
About the AMSC data
Daily bars. 8,759 sessions from Dec 12, 1991 to Sep 28, 2026, one row per Nasdaq trading day with open, high, low, close and volume. Prices are adjusted for splits and cash dividends so the series is comparable across its whole length; the API also serves the raw, split only and dividend only views.
Minute bars. Stored from Jul 13, 2026 forward, most recent session Sep 28, 2026. Minute history is captured from the day collection began and is never backfilled, so this start date is exact. Five minute, fifteen minute and hourly bars are derived from these minutes.
Time and currency. Session dates are Nasdaq trading days; minute timestamps are UTC. Prices are in USD. Volume is shares traded on the session.
Get the data. The REST endpoint returns the daily series as JSON with pagination; a free key serves the last year, Quant and above the full history back to Dec 12, 1991, and minute bars come with the paid windows. It takes timeframe (1Min, 5Min, 15Min, 1Hour, 1Day), adjustment, start and end. See the bars endpoint and authentication, and pricing for the plan windows.
curl "https://api.datacedar.com/v3/stocks/AMSC/bars?timeframe=1Day&adjustment=all&limit=50000" \
-H "X-API-Key: YOUR_KEY"Nearby on Nasdaq
Common questions
AMSC share price history
