American Superconductor Corp (AMSC): Weighted Average Diluted Shares

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.

43.90M

Year ended 2026-03-31

+16.4%

3-year compound annual growth

+13.0%

5-year compound annual growth

+12.8%

10-year compound annual growth

2009-03-31 Weighted Average Diluted Shares (shares) 2026-03-31

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

Period ended	Weighted Average Diluted Shares	Change YoY	Source filing
2026-03-31	43.90M	+16.4%	2026-05-27, From 2025-04-01
2025-03-31	37.72M	+26.5%	2026-05-27, From 2024-04-01
2024-03-31	29.82M	+7.1%	2026-05-27, From 2023-04-01
2023-03-31	27.85M	+2.4%	2024-05-29, From 2022-04-01
2022-03-31	27.20M	+13.9%	2023-05-31, From 2021-04-01
2021-03-31	23.88M	+13.3%	2021-06-02, From 2020-04-01
2020-03-31	21.07M	+1.7%	2021-06-02, From 2019-04-01
2019-03-31	20.73M	+9.3%	2020-06-02, From 2018-04-01
2018-03-31	18.97M	+37.4%	2019-06-05, From 2017-04-01
2017-03-31	13.80M	+4.8%	2018-06-06, From 2016-04-01
2016-03-31	13.18M	n/c	2018-06-06, From 2015-04-01
2015-03-31	8.48M	+35.4%	2017-05-25, From 2014-04-01
2014-03-31	6.26M	+18.0%	2016-05-31, From 2013-04-01
2013-03-31	5.31M	n/c	2015-05-28, From 2012-04-01
2012-03-31	50.84M	+7.9%	2014-06-05, From 2011-04-01
2011-03-31	47.10M	+4.0%	2013-06-14, From 2010-04-01
2010-03-31	45.29M	+6.0%	2012-06-06, From 2009-04-01
2009-03-31	42.72M	n/a	2011-09-23, From 2008-04-01