TickerFacts.

American Superconductor Corp (AMSC): Shares Outstanding

Annual figures by period end, from SEC filings.

Stock splits: 1-for-10, first reflected in a filing dated 2015-05-28. Figures are as filed: per-share figures and share counts last reported before a split are on the old share basis, so changes and growth rates across a split are not shown. Splits are read from the filings' own restatements, so a share conversion in a merger or reorganization shows up the same way.

47.63M
As of 2026-03-31
48.45M
As of 2026-06-30
+17.3%
3-year compound annual growth
+11.5%
5-year compound annual growth
78.93M2010-03-31: 44.85M2011-03-31: 50.72M2012-03-31: 51.96M2013-03-31: 60.30M2014-03-31: 78.93M2019-03-31: 21.41M2020-03-31: 22.60M2021-03-31: 27.59M2022-03-31: 28.52M2023-03-31: 29.54M2024-03-31: 36.95M2025-03-31: 39.48M2026-03-31: 47.63M47.63M
2010-03-31 Shares Outstanding (shares) 2026-03-31

Paler bars were last filed before a stock split, on the old share basis.

Period endedShares OutstandingChange YoYSource filing
2026-03-3147.63M+20.6%2026-05-27, Balance as of period end
2025-03-3139.48M+6.9%2026-05-27, Balance as of period end
2024-03-3136.95M+25.1%2025-05-21, Balance as of period end
2023-03-3129.54M+3.6%2024-05-29, Balance as of period end
2022-03-3128.52M+3.4%2023-05-31, Balance as of period end
2021-03-3127.59M+22.1%2022-06-01, Balance as of period end
2020-03-3122.60M+5.6%2021-06-02, Balance as of period end
2019-03-3121.41Mn/c2020-06-02, Balance as of period end
No annual figure between 2014-03-31 and 2019-03-31.
2014-03-3178.93M+30.9%2014-06-05, Balance as of period end
2013-03-3160.30M+16.0%2014-06-05, Balance as of period end
2012-03-3151.96M+2.4%2013-06-14, Balance as of period end
2011-03-3150.72M+13.1%2012-06-06, Balance as of period end
2010-03-3144.85Mn/a2011-09-23, Balance as of period end