How shorted is AXCELIS TECHNOLOGIES INC right now?

5.25% of AXCELIS TECHNOLOGIES INC's (ACLS) shares outstanding were reported short for settlement date 31 Jul 2026, per FINRA's consolidated short interest report.

What does this number include?

FINRA member firms must report their short positions in all US equities twice a month; FINRA consolidates them per security. We divide that official share count by the company's shares outstanding from its SEC filings. This is the regulatory figure, not a daily estimate.

Why does it only update twice a month?

US short interest is reported for settlement on the 15th and the last business day of each month, and FINRA publishes the consolidated figures about nine business days later. That cadence is set by regulation; no daily official figure exists.

Which funds are short?

US public short interest is aggregate-only: individual short sellers are not named. Only some EU markets publish named positions.

How shorted is AXCELIS TECHNOLOGIES INC?

More shorted than 56% of the 2,877 ranked US companies

5.25%

of shares outstanding reported short · settlement date 31 Jul 2026

vs previous report: −0.51
5 reports (~10 weeks): −3.31

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<iframe src="https://howshorted.com/embed/us/acls/" width="100%" height="430" style="border:0" loading="lazy" title="AXCELIS TECHNOLOGIES INC short interest chart"></iframe>
<p>Source: FINRA data compiled by <a href="https://howshorted.com/us/company/acls/">howshorted.com</a></p>

Cite this page

Short position data for AXCELIS TECHNOLOGIES INC: FINRA, compiled by howshorted.com, settlement date 31 Jul 2026. https://howshorted.com/us/company/acls/

History

Settlement date	Short %	Change
31 Jul 2026	5.25%	−0.51
15 Jul 2026	5.76%	−0.42
30 Jun 2026	6.18%	−0.05
15 Jun 2026	6.23%	−2.06
29 May 2026	8.29%	−0.27
15 May 2026	8.56%	−1.09
30 Apr 2026	9.65%	−1.65
15 Apr 2026	11.30%	−0.95
31 Mar 2026	12.25%	+0.30
13 Mar 2026	11.95%	+0.02
27 Feb 2026	11.93%	−4.17
13 Feb 2026	16.10%	+0.77
30 Jan 2026	15.33%	+0.36
15 Jan 2026	14.97%	+2.03
31 Dec 2025	12.94%	−0.65
15 Dec 2025	13.59%	+0.46
28 Nov 2025	13.13%	+0.82
14 Nov 2025	12.31%	−1.63
31 Oct 2025	13.94%	−0.30
15 Oct 2025	14.24%	+1.63
30 Sep 2025	12.61%	−2.25
15 Sep 2025	14.86%	+0.32
29 Aug 2025	14.54%	−0.04
15 Aug 2025	14.58%	−1.87
31 Jul 2025	16.45%	–

Frequently asked questions

How shorted is AXCELIS TECHNOLOGIES INC right now?: 5.25% of AXCELIS TECHNOLOGIES INC's (ACLS) shares outstanding were reported short for settlement date 31 Jul 2026, per FINRA's consolidated short interest report.
What does this number include?: FINRA member firms must report their short positions in all US equities twice a month; FINRA consolidates them per security. We divide that official share count by the company's shares outstanding from its SEC filings. This is the regulatory figure, not a daily estimate.
Why does it only update twice a month?: US short interest is reported for settlement on the 15th and the last business day of each month, and FINRA publishes the consolidated figures about nine business days later. That cadence is set by regulation; no daily official figure exists.
Which funds are short?: US public short interest is aggregate-only: individual short sellers are not named. Only some EU markets publish named positions.