AMSC
American Superconductor Corp /De/Company with tickers: AMSC
CIK
880807
CUSIP
030111207
Shares Outstanding
47,694,445
Website
https://www.amsc.com
Investor Relations
https://www.amsc.com/investors/
13F Activity (30d)
76 filings
73 filers
Weekly off-exchange (dark pool / OTC) trading volume reported to FINRA under its OTC/ATS Transparency data. ATS volume is executed on alternating trading systems (dark pools); non-ATS OTC is other over-the-counter dealer volume. The off-exchange share is total off-exchange volume as a percentage of consolidated weekly trading volume for the same Monday–Friday week.
Off-Exchange Volume History
| Week Start | ATS Volume | Non-ATS OTC Volume | Total Off-Exchange | % of FINRA Weekly Volume |
|---|---|---|---|---|
| 2026-05-04 | 943,447 | 1,918,838 | 2,862,285 | 54.7% |
| 2026-04-27 | 1,730,465 | 2,725,036 | 4,455,501 | 57.9% |
| 2026-04-20 | 1,847,080 | 2,846,274 | 4,693,354 | 51.9% |
| 2026-04-13 | 1,452,926 | 1,248,607 | 2,701,533 | 61.3% |
| 2026-04-06 | 816,096 | 1,177,302 | 1,993,398 | 44.5% |
| 2026-03-30 | 860,729 | 1,027,914 | 1,888,643 | 49.9% |
| 2026-03-23 | 1,356,934 | 1,122,016 | 2,478,950 | 41.3% |
| 2026-03-16 | 559,116 | 711,545 | 1,270,661 | 36.2% |
| 2026-03-09 | 949,668 | 928,602 | 1,878,270 | 41.5% |
| 2026-03-02 | 809,320 | 906,557 | 1,715,877 | 41.0% |
| 2026-02-23 | 670,393 | 1,065,923 | 1,736,316 | 46.4% |
| 2026-02-16 | 1,013,953 | 1,626,010 | 2,639,963 | 47.2% |
| 2026-02-09 | 2,363,356 | 2,128,275 | 4,491,631 | 44.5% |
| 2026-02-02 | 2,309,665 | 1,751,159 | 4,060,824 | 40.7% |
| 2026-01-26 | 779,207 | 672,749 | 1,451,956 | 42.0% |
| 2026-01-19 | 658,453 | 907,131 | 1,565,584 | 44.4% |
| 2026-01-12 | 669,724 | 737,708 | 1,407,432 | 40.8% |
| 2026-01-05 | 970,783 | 957,594 | 1,928,377 | 42.9% |
| 2025-12-29 | 902,336 | 524,913 | 1,427,249 | 37.6% |
| 2025-12-22 | 395,858 | 524,175 | 920,033 | 40.5% |
| 2025-12-15 | 978,973 | 1,200,097 | 2,179,070 | 47.7% |
| 2025-12-08 | 774,845 | 814,921 | 1,589,766 | 42.3% |
| 2025-12-01 | 745,003 | 889,023 | 1,634,026 | 42.5% |
| 2025-11-24 | 709,476 | 668,526 | 1,378,002 | 38.3% |
| 2025-11-17 | 998,755 | 1,152,066 | 2,150,821 | 42.9% |
| 2025-11-10 | 1,602,066 | 1,622,330 | 3,224,396 | 48.1% |
| 2025-11-03 | 2,533,371 | 2,853,097 | 5,386,468 | 49.7% |
| 2025-10-27 | 903,644 | 1,256,662 | 2,160,306 | 46.4% |
| 2025-10-20 | 1,027,348 | 1,559,877 | 2,587,225 | 49.6% |
| 2025-10-13 | 1,158,679 | 2,046,168 | 3,204,847 | 50.2% |
| 2025-10-06 | 1,092,431 | 1,920,731 | 3,013,162 | 49.5% |
| 2025-09-29 | 1,046,616 | 1,585,697 | 2,632,313 | 49.2% |
| 2025-09-22 | 1,076,319 | 1,886,639 | 2,962,958 | 52.0% |
| 2025-09-15 | 1,456,632 | 2,682,323 | 4,138,955 | 47.0% |
| 2025-09-08 | 1,153,385 | 1,653,513 | 2,806,898 | 53.1% |
| 2025-09-01 | 707,926 | 870,482 | 1,578,408 | 48.9% |
| 2025-08-25 | 854,130 | 1,156,634 | 2,010,764 | 48.3% |
| 2025-08-18 | 1,162,212 | 1,483,169 | 2,645,381 | 52.1% |
| 2025-08-11 | 1,069,892 | 1,353,156 | 2,423,048 | 45.9% |
| 2025-08-04 | 1,192,608 | 1,619,613 | 2,812,221 | 46.6% |
| 2025-07-28 | 2,449,412 | 2,504,807 | 4,954,219 | 47.1% |
| 2025-07-21 | 991,859 | 1,187,639 | 2,179,498 | 48.6% |
| 2025-07-14 | 1,030,241 | 1,378,168 | 2,408,409 | 48.2% |
| 2025-07-07 | 958,545 | 1,145,812 | 2,104,357 | 47.8% |
| 2025-06-30 | 918,384 | 1,502,864 | 2,421,248 | 48.1% |
| 2025-06-23 | 1,165,676 | 1,999,789 | 3,165,465 | 47.2% |
| 2025-06-16 | 850,364 | 1,083,161 | 1,933,525 | 44.9% |
Showing 1–47 of 47 weeks