Axcelis Technologies Inc (ACLS): Shares Outstanding

Annual figures by period end, from SEC filings.

Stock splits: 1-for-4, first reflected in a filing dated 2016-08-08. 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.

30.72M

As of 2025-12-31

30.88M

As of 2026-06-30

-2.1%

3-year compound annual growth

-1.8%

5-year compound annual growth

+0.6%

10-year compound annual growth

2010-12-31 Shares Outstanding (shares) 2025-12-31

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

Period ended	Shares Outstanding	Change YoY	Source filing
2025-12-31	30.72M	-5.1%	2026-02-26, Balance as of period end
2024-12-31	32.37M	-1.0%	2026-02-26, Balance as of period end
2023-12-31	32.69M	-0.3%	2025-02-28, Balance as of period end
2022-12-31	32.77M	-1.4%	2024-02-28, Balance as of period end
2021-12-31	33.24M	-1.2%	2023-02-24, Balance as of period end
2020-12-31	33.63M	+3.2%	2022-02-25, Balance as of period end
2019-12-31	32.59M	+0.1%	2021-02-26, Balance as of period end
2018-12-31	32.56M	+1.6%	2020-03-02, Balance as of period end
2017-12-31	32.05M	+8.6%	2019-03-11, Balance as of period end
2016-12-31	29.52M	+1.8%	2018-03-14, Balance as of period end
2015-12-31	29.00M	n/c	2017-03-14, Balance as of period end
2014-12-31	112.73M	+2.4%	2016-03-04, Balance as of period end
2013-12-31	110.11M	+1.8%	2015-03-12, Balance as of period end
2012-12-31	108.17M	+1.4%	2014-03-03, Balance as of period end
2011-12-31	106.69M	+0.9%	2013-03-01, Balance as of period end
2010-12-31	105.79M	n/a	2012-02-29, Balance as of period end