American Superconductor Corporation AMSC

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American Superconductor Corporation - Common Stock · Company · Nasdaq

Paper trade (simulated — no real money)

Fill: USD 30.5200 · FX 1 USD = 1.290100 SGD · about SGD 39.3739 per unit

Sign in to place simulated trades. USD fills are converted into the SGD portfolio at the displayed rate.

Announcement types: (default: consequential filings)
Results & current reports
Capital markets
Ownership & governance

USD closing-price chart (daily close from yfinance · Last year)

USD 43.76 → 30.52 · -30.3%
66.68046.31525.950 1 2,3 4,5 6 7,8 9,10 11 12,13 14 15,16 Jul 25Oct 25Jan 26Apr 26Jul 26

Numbered dotted lines mark the filtered filings under Announcement Events below.

Price & SEC Filing History 26 Jul 2025 — 27 Jul 2026 (Last year)

Daily Nasdaq prices are sourced from yfinance. Yellow highlighting marks an intraday rise or a gap up between adjacent trading sessions. SEC acceptance times are converted to US Eastern time: pre-market filings appear below that day’s OHLCV row; filings accepted after the 09:30 ET open appear above it. The SEC does not publish an exact first-public-availability timestamp, so acceptance time is the best available proxy.

No data yet
Weekend
Weekend
32.9600 32.9600 30.2000 30.5200 1,119,500
32.8200 33.9200 32.2300 33.0000 884,800
34.5500 34.9900 33.2000 33.4000 765,900
33.5600 34.7900 33.3300 34.5500 704,700
33.5200 34.1200 32.3100 32.5100 420,900
Weekend
Weekend
31.5800 33.9800 31.4100 33.0300 609,100
34.2200 34.2400 32.3400 33.0900 577,100
35.5500 36.4000 34.2200 35.3000 527,500
35.5000 35.8000 35.0300 35.4600 419,500
35.1000 35.5500 33.9700 34.1800 558,300
Weekend
Weekend
37.1700 37.7200 35.7600 35.9600 563,100
37.6600 37.8100 36.4900 37.1700 717,200
34.6200 36.1700 34.1800 36.0000 831,100
37.0200 37.2000 34.5000 35.5500 735,900
37.6100 39.1100 37.3400 38.1300 845,900
Weekend
Weekend
No trading
40.1000 40.4500 36.2800 37.1100 878,900
40.6400 41.4900 39.6000 39.9200 710,300
39.8900 41.6700 39.5100 41.5100 710,100
40.2400 41.4000 37.8100 39.8300 841,600
Weekend
Weekend
38.9600 41.1900 38.0200 39.7300 2,160,400
41.9300 42.8400 40.0700 40.2800 961,300
42.1300 42.2400 39.6000 40.8500 848,000
42.0400 44.1100 41.6000 41.6300 767,200
43.7200 45.4300 42.9900 45.3300 1,035,100
Weekend
Weekend
No trading
16 · DEFA14A After-hours · 16:07 ET DEFA14A ↗ 15 · DEF 14A After-hours · 16:05 ET DEF 14A ↗
41.4900 43.4900 40.4400 43.4000 1,125,000
40.5700 42.1800 40.0700 40.1300 799,900
41.0700 42.3600 40.3500 40.4600 1,115,500
42.0600 42.9800 40.5200 41.0700 924,200
Weekend
Weekend
39.5100 40.6200 38.7100 40.0200 806,200
37.4400 39.5400 36.7100 39.5100 1,842,900
40.2900 40.9600 36.7200 36.7800 2,420,000
43.6600 44.7600 38.9200 40.5300 1,558,700
42.8600 44.3900 40.7600 43.3400 1,583,300
Weekend
Weekend
45.3400 45.9500 41.2000 42.3400 1,820,800
45.6400 47.2400 45.1900 46.4000 1,263,800
51.0000 51.3000 46.2400 46.6700 1,478,500
14 · 8-K After-hours · 16:05 ET FORM 8-K ↗
51.4600 52.5500 48.8700 51.1700 1,281,700
49.4700 51.9900 48.7700 51.1500 1,134,000
Weekend
Weekend
51.1900 53.3700 48.5200 50.9400 1,335,600
50.0000 51.3700 45.4600 51.3300 3,434,100
13 · 10-K After-hours · 16:09 ET FORM 10-K ↗ 12 · 8-K After-hours · 16:06 ET FORM 8-K ↗
53.6000 55.0900 51.5500 52.6800 1,942,200
54.0000 54.4000 51.2800 53.1200 1,169,500
No trading
Weekend
Weekend
50.2800 52.4800 48.8600 51.8400 745,100
48.6400 50.6600 48.3900 49.4200 659,800
48.4600 50.1000 47.2200 49.2200 933,300
48.1000 48.6200 45.7200 47.0900 1,168,400
54.8600 55.1100 48.5200 50.1500 1,264,200
Weekend
Weekend
51.5300 55.2400 50.3200 55.0600 1,059,800
55.7300 55.7800 52.5800 54.7000 1,210,700
55.8100 56.2500 53.0000 55.7300 977,300
57.0400 57.0500 51.3200 54.5100 1,314,800
55.1000 60.1800 54.8100 58.7200 1,749,700
Weekend
Weekend
54.3700 55.6800 53.4700 55.1900 859,800
56.0900 56.9000 52.6600 53.2200 1,201,600
55.5900 57.1800 53.7100 57.0700 1,080,300
50.9900 55.7000 50.9900 55.0100 1,400,600
52.5100 53.0000 48.5300 50.3000 1,068,800
Weekend
Weekend
53.2200 54.2000 51.4200 52.5100 1,310,400
49.2300 53.6500 48.0000 53.5400 1,863,800
47.7900 48.6000 45.6900 47.7000 1,293,200
47.9100 49.4900 45.5700 47.5000 1,769,600
52.3900 52.3900 46.0100 49.6400 2,525,400
Weekend
Weekend
48.1400 50.7800 45.5000 49.4800 2,319,300
51.2500 51.4700 44.4700 46.1500 2,644,600
43.4000 48.2300 43.4000 48.1500 2,463,700
41.3600 42.9300 40.7500 41.9300 1,587,000
39.3700 40.8400 38.8100 40.7300 692,300
Weekend
Weekend
39.0000 40.7500 38.1300 39.7200 1,058,400
37.8600 38.5900 36.8900 37.9700 917,300
40.0000 40.0400 37.2100 37.7400 1,294,000
39.0000 39.6000 37.2500 39.4500 993,900
37.2900 38.1100 36.5400 37.8100 796,900
Weekend
Weekend
36.5000 39.2500 36.3500 37.7100 1,238,000
32.8700 36.4100 32.8700 36.1500 1,408,100
33.7300 34.2800 32.6800 33.0200 918,500
32.1000 32.2700 30.8700 31.5400 562,600
32.3700 32.9900 31.9700 32.6200 380,900
Weekend
Weekend
No trading
31.3300 32.8900 30.9600 32.0900 630,500
34.2600 35.0500 32.6000 32.6500 633,700
32.6000 34.2800 32.1800 33.8500 1,135,600
33.8700 33.8700 31.3600 32.2100 1,978,100
Weekend
Weekend
31.6400 34.0400 31.6400 33.7200 1,042,000
32.5600 34.2700 32.2100 32.3100 1,573,100
32.8700 34.6500 32.5700 33.5600 946,800
30.0000 32.7300 30.0000 32.2100 893,300
29.5300 30.9500 28.8200 30.8000 1,548,000
Weekend
Weekend
30.4700 30.7800 28.5500 28.7400 1,246,100
29.0300 31.2000 28.6900 30.6700 505,000
31.1000 31.6700 30.1100 30.1400 621,300
30.8300 31.5500 30.5600 31.1700 503,700
32.1500 32.5000 30.1100 30.9000 637,200
Weekend
Weekend
29.6800 31.1900 29.6800 31.0200 925,400
29.7000 30.0300 28.8200 29.2600 666,600
29.4500 30.8300 29.3300 30.6600 724,000
29.0000 30.2300 28.9600 29.6800 917,500
27.0900 29.1100 26.4600 29.0400 1,292,100
Weekend
Weekend
29.9100 30.4700 27.6900 27.7000 1,531,700
31.3500 31.7000 30.0100 30.8400 687,800
31.9200 32.5500 31.3900 31.8600 444,000
31.4000 31.5800 30.0800 31.0900 718,800
30.2000 33.3800 30.0800 33.0100 803,700
Weekend
Weekend
33.1500 33.6200 32.3800 32.5800 805,100
34.3000 34.8100 33.2000 34.6400 614,600
33.9000 35.8100 33.8000 34.6800 699,300
32.3100 34.2400 32.0500 33.7100 820,600
33.6100 34.3500 32.0100 32.5100 801,700
Weekend
Weekend
33.1700 35.5300 32.5000 34.0400 1,173,300
34.5300 35.0600 33.0000 33.7800 986,200
37.4000 38.1000 34.0000 34.7800 1,764,500
11 · 8-K/A After-hours · 16:08 ET FORM 8-K/A ↗
33.6400 36.8200 32.6200 36.6600 1,667,200
No trading
Weekend
Weekend
31.9500 34.5300 31.0500 34.2600 1,435,300
34.9900 35.5000 31.8100 31.9500 1,520,000
33.4900 34.8200 31.2100 34.2600 2,737,600
28.6400 32.3600 28.0700 31.8800 3,315,600
28.1300 30.1300 27.7400 28.7900 1,079,800
Weekend
Weekend
26.3600 28.3600 25.2800 28.1700 2,061,000
31.7600 31.8500 24.8700 25.9500 3,549,100
10 · 10-Q After-hours · 16:10 ET FORM 10-Q ↗ 9 · 8-K After-hours · 16:07 ET FORM 8-K ↗
30.1000 30.1700 26.9200 27.6100 1,912,100
30.9000 31.2400 28.7500 30.0000 1,010,700
29.9300 30.9000 29.1500 30.0200 1,454,600
Weekend
Weekend
30.9600 31.6700 29.6700 29.9200 762,200
31.8000 31.9200 30.2200 31.4500 758,300
32.5700 32.8800 31.3000 31.8200 606,200
32.0000 32.4200 31.3600 32.1700 487,200
33.1300 33.9400 31.3600 31.5500 843,500
Weekend
Weekend
33.2600 34.5000 32.1300 33.2800 1,006,300
32.4200 33.4700 31.8000 33.1000 957,100
31.8300 32.2000 30.0400 31.8100 871,600
30.5200 31.4200 30.2800 31.1600 691,500
No trading
Weekend
Weekend
31.2800 32.7000 30.9400 32.1900 761,400
31.6400 32.0000 30.9600 31.0800 653,500
31.1800 31.2700 30.1000 31.2500 712,000
30.8500 31.7800 30.6500 31.5600 725,100
30.3000 31.1200 29.5000 30.4700 594,000
Weekend
Weekend
30.9500 31.3000 29.9200 30.6700 591,500
30.8000 31.0500 29.9500 30.5800 693,700
30.8000 31.3800 30.1600 30.7500 705,600
33.2800 33.4800 29.9700 30.7500 1,293,500
32.3500 33.6900 32.0800 33.2100 1,208,600
Weekend
Weekend
29.7500 31.6100 29.7100 31.5800 1,042,100
No trading
28.9700 29.1800 28.6800 28.7800 832,800
29.4100 29.4400 28.9400 28.9500 1,096,800
30.2000 30.6400 29.2100 29.2400 828,800
Weekend
Weekend
31.3700 31.4500 30.4000 30.5800 525,900
No trading
31.5100 31.5800 30.9000 31.3400 305,500
8 · 8-K After-hours · 16:12 ET 8-K ↗ 7 · 424B7 After-hours · 16:05 ET 424B7 ↗
31.5900 32.1800 31.4900 31.7700 546,100
31.2800 32.2900 30.7300 31.8600 892,800
Weekend
Weekend
30.4900 31.6100 30.2900 30.6500 920,700
30.4000 31.4000 30.0100 30.5900 790,000
31.4300 32.0600 28.9700 29.0400 1,216,900
31.2000 32.5900 30.9900 31.2100 643,100
31.5800 31.8400 30.6700 31.5100 1,001,900
Weekend
Weekend
32.2200 32.4600 30.2700 31.0700 854,700
32.7400 32.8000 31.4100 32.2400 928,400
6 · 8-K After-hours · 16:04 ET 8-K ↗
32.4200 33.5900 31.6700 33.3700 891,000
32.2700 32.7100 31.7500 32.5100 559,500
32.9600 33.1600 32.0200 32.4600 528,800
Weekend
Weekend
33.0100 33.1600 31.9500 32.4700 743,300
31.7900 33.5000 31.7000 33.0100 737,400
30.7400 32.1500 29.9000 32.0400 631,200
30.6300 31.6400 30.5000 30.7900 812,500
30.0900 30.9500 29.6500 29.9500 916,100
Weekend
Weekend
30.9100 31.4100 30.5800 31.0900 585,000
No trading
31.3200 31.5000 30.2700 30.5000 1,132,400
31.0700 31.2400 29.5300 30.7500 999,800
30.8200 31.8300 30.5400 31.2700 879,600
Weekend
Weekend
29.7300 30.9800 28.7000 30.3800 1,198,000
32.8800 33.4200 29.7000 29.7800 1,124,200
32.1700 32.6100 30.8100 31.1800 662,900
31.4000 32.5700 30.6900 31.1700 1,056,000
33.7400 34.0100 31.6900 32.1300 971,900
Weekend
Weekend
32.0700 34.8500 31.8400 33.9100 875,300
34.7900 35.1800 32.8200 33.6300 1,379,000
35.9600 36.4000 34.4300 35.1800 859,300
36.3400 36.3400 34.1600 35.3200 1,494,800
40.2800 40.9000 36.7000 36.9100 2,093,200
Weekend
Weekend
35.8000 38.8700 33.8100 38.8600 3,040,100
42.8100 44.8300 36.2000 36.5500 5,403,900
5 · 10-Q After-hours · 16:13 ET FORM 10-Q ↗ 4 · 8-K After-hours · 16:09 ET FORM 8-K ↗
57.2000 60.6500 56.0800 59.4200 1,095,200
57.3000 58.8000 55.2600 56.2900 676,700
59.7500 61.3000 58.5100 60.6300 631,700
Weekend
Weekend
60.7900 61.2000 58.1000 59.2300 701,700
61.7800 62.6300 58.1100 58.9200 957,200
57.9700 64.7200 57.9700 63.0100 1,369,600
57.4800 59.3600 56.6900 57.8600 685,000
61.0000 61.5900 56.9600 57.8500 943,200
Weekend
Weekend
58.4000 61.9400 57.4700 59.5800 1,093,500
54.8500 57.2000 54.0100 56.5300 870,400
58.8300 59.4900 52.7500 54.7800 1,737,800
61.0700 61.0700 58.0100 59.2600 651,700
61.9200 63.7000 59.3100 61.0300 863,700
Weekend
Weekend
60.8600 62.5000 57.8000 60.0200 1,010,000
68.5600 68.5600 62.1900 63.0500 822,800
68.7600 70.4900 63.8400 66.6800 1,519,100
59.2100 66.5500 57.0100 65.5400 1,910,300
58.7200 62.2200 58.2800 61.5700 1,115,700
Weekend
Weekend
59.7400 63.0100 56.0700 56.2400 1,255,900
61.0000 61.6100 59.1900 59.8000 831,000
57.3200 61.0400 57.2900 60.7000 1,112,200
61.4800 62.7900 55.5100 56.5500 1,818,000
62.4000 63.6400 58.7100 60.9800 1,069,100
Weekend
Weekend
60.0000 62.1600 58.3800 59.3000 1,557,500
60.0600 60.9900 58.2600 59.2500 809,200
58.7400 60.0800 57.6200 59.1700 661,300
60.9300 61.5000 57.8000 59.3900 1,059,700
59.5000 62.0000 59.5000 60.8400 1,259,300
Weekend
Weekend
58.8600 59.7500 57.4900 58.5700 710,200
56.6900 58.9800 54.1300 57.9600 1,046,000
62.1000 62.4100 58.1300 59.6100 1,230,200
64.1500 64.5300 60.0600 61.3400 1,226,600
61.7800 65.1200 60.3100 64.6300 1,487,800
Weekend
Weekend
65.5100 65.7000 60.6500 61.5500 2,874,200
63.0600 65.5800 60.0500 64.4900 2,386,800
56.3400 61.1100 55.3900 60.4900 2,111,400
56.5000 56.6000 54.8900 56.5100 645,200
57.0000 57.2500 55.3000 56.5900 795,700
Weekend
Weekend
54.9500 57.3000 54.0900 56.3200 1,329,400
52.0600 54.9600 51.9000 54.7200 1,134,500
51.6100 53.4900 51.2000 51.4500 1,083,700
50.0000 50.6300 47.5200 49.8500 685,200
49.2500 51.4700 48.8500 50.0800 1,054,800
Weekend
Weekend
49.6300 50.1000 47.2000 48.8800 633,500
48.1200 49.5100 47.3600 48.5300 1,077,600
49.6700 50.2700 48.4900 48.6300 710,700
48.1100 49.4200 46.4600 48.7600 807,000
No trading
Weekend
Weekend
53.6600 53.6600 49.7400 49.9000 1,108,900
52.5200 54.6200 52.4600 53.8400 743,900
52.5100 53.1400 51.1000 52.1100 842,400
49.9200 52.5000 49.4400 52.2600 964,600
50.6000 50.8100 49.5500 49.5800 503,800
Weekend
Weekend
48.6000 51.2000 47.8100 50.6800 760,000
47.9200 49.4100 47.6200 48.5900 935,400
48.2800 48.9500 46.4600 48.1100 1,222,600
52.7900 53.4100 48.5600 48.8200 1,418,600
53.7300 54.5700 52.1600 53.4600 737,400
Weekend
Weekend
52.1500 53.0900 50.0300 53.0600 907,400
53.3400 55.4500 51.7500 52.1600 954,500
56.7600 57.5400 53.0000 54.0900 1,271,100
52.6000 56.2300 52.6000 55.8900 1,113,300
51.2800 53.6700 50.7000 52.1500 1,028,300
Weekend
Weekend
54.1800 54.6200 50.4500 50.9900 1,245,400
55.0000 55.9900 52.1000 54.3000 1,063,300
55.5300 55.7800 54.2300 54.8700 794,900
56.1500 58.4200 54.6200 55.6200 1,268,800
54.7900 56.6100 53.7100 55.5200 1,662,200
Weekend
Weekend
53.2100 55.3600 50.6700 53.7500 2,403,500
47.8000 57.8600 47.7000 56.8500 5,321,400
3 · 10-Q After-hours · 16:08 ET FORM 10-Q ↗ 2 · 8-K After-hours · 16:06 ET FORM 8-K ↗
43.5500 44.8500 43.2400 43.9400 1,223,500
1 · 8-K After-hours · 16:09 ET FORM 8-K ↗
44.2300 44.6100 43.3300 43.4800 796,700
44.1700 44.1700 42.5500 43.7600 777,800
Weekend
Weekend

Announcement Events

Each title opens the filing on the SEC website. Registered users can summarise the filing and up to seven relevant exhibits linked within the same SEC submission.

16 DEFA14A DEFA14A (opens SEC filing in a new tab) After-hours · 16:07 ET Summarise
15 DEF 14A DEF 14A (opens SEC filing in a new tab) After-hours · 16:05 ET Summarise
14 8-K FORM 8-K (opens SEC filing in a new tab) After-hours · 16:05 ET Summarise
13 10-K FORM 10-K (opens SEC filing in a new tab) After-hours · 16:09 ET Summarise
12 8-K FORM 8-K (opens SEC filing in a new tab) After-hours · 16:06 ET Summarise
11 8-K/A FORM 8-K/A (opens SEC filing in a new tab) After-hours · 16:08 ET Summarise
10 10-Q FORM 10-Q (opens SEC filing in a new tab) After-hours · 16:10 ET Summarise
9 8-K FORM 8-K (opens SEC filing in a new tab) After-hours · 16:07 ET Summarise
8 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:12 ET Summarise
7 424B7 424B7 (opens SEC filing in a new tab) After-hours · 16:05 ET Summarise
6 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:04 ET Summarise
5 10-Q FORM 10-Q (opens SEC filing in a new tab) After-hours · 16:13 ET Summarise
4 8-K FORM 8-K (opens SEC filing in a new tab) After-hours · 16:09 ET Summarise
3 10-Q FORM 10-Q (opens SEC filing in a new tab) After-hours · 16:08 ET Summarise
2 8-K FORM 8-K (opens SEC filing in a new tab) After-hours · 16:06 ET Summarise
1 8-K FORM 8-K (opens SEC filing in a new tab) After-hours · 16:09 ET Summarise