Altimmune, Inc. short interest in 2026

In 2026, Altimmune, Inc.'s disclosed short interest ran from 25.33% of shares outstanding on 15 Jan 2026 to 26.60% on 15 Sep 2026, a change of +1.27 percentage points. The year's high was 27.25% on 30 Apr 2026 and its low 19.35% on 15 May 2026, averaging 23.52% across 17 twice-monthly settlement dates. FINRA's days-to-cover figure peaked at 15.38 days on 15 Sep 2026. Full history: Altimmune, Inc..

Cite this page

Plain

Short position data for Altimmune, Inc. short interest in 2026: FINRA, compiled by howshorted.com, settlement date 15 Sep 2026. https://howshorted.com/us/company/alt/2026/

Wikipedia

<ref>{{cite web |title=Altimmune, Inc. short interest in 2026 short position data |url=https://howshorted.com/us/company/alt/2026/ |website=HowShorted |publisher=howshorted.com (data: FINRA) |date=2026-09-15 |access-date=2026-10-13}}</ref>

BibTeX

@misc{howshorted-altimmune-inc-short-interest-in-2026-2026-09-15,
  title        = {Altimmune, Inc. short interest in 2026 short position data},
  author       = {{HowShorted}},
  howpublished = {\url{https://howshorted.com/us/company/alt/2026/}},
  note         = {Data: FINRA, settlement date 15 Sep 2026; accessed 2026-10-13},
  year         = {2026}
}

By year: 2019 · 2020 · 2021 · 2022 · 2023 · 2024 · 2025 · 2026

2026 in figures

Start of year: 25.33% (15 Jan 2026)
End of year: 26.60% (15 Sep 2026)
Change: +1.27 pp
High: 27.25% (30 Apr 2026)
Low: 19.35% (15 May 2026)
Average: 23.52%
Highest days to cover: 15.38 (15 Sep 2026)
SEC filings marked: 6

Every report in 2026

Altimmune, Inc. short interest in 2026
Settlement	Short interest	Days to cover	Filings since previous
15 Jan 2026	25.33%	4.24
30 Jan 2026	23.18%	3.50
13 Feb 2026	24.11%	7.24
27 Feb 2026	19.60%	9.97
13 Mar 2026	20.36%	6.96	results (8-K), 10-K filed
31 Mar 2026	22.49%	7.65
15 Apr 2026	22.09%	13.71
30 Apr 2026	27.25%	4.93
15 May 2026	19.35%	11.02	10-Q filed, results (8-K)
29 May 2026	20.12%	14.46
15 Jun 2026	21.56%	14.57
30 Jun 2026	24.49%	8.07
15 Jul 2026	24.81%	12.52
31 Jul 2026	26.71%	11.45
14 Aug 2026	26.20%	11.04	10-Q filed, results (8-K)
31 Aug 2026	25.56%	11.84
15 Sep 2026	26.60%	15.38

About this data

US short interest data: FINRA (finra.org), shown as reported shares short divided by SEC-reported shares outstanding for each settlement date. FINRA® is a registered trademark of the Financial Industry Regulatory Authority, Inc. This site is not affiliated with or endorsed by FINRA or the SEC; displayed for personal reference, bulk redistribution is not permitted (see terms). Nothing here is investment advice. Method: methodology.