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HowShorted

How shorted is ATOSSA THERAPEUTICS, INC.? ATOS

#1,048most shorted US stockof 3,805 ranked stocks, more shorted than 72%

7.64%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
+0.07
5 reports (~10 weeks)
−0.54
days to cover
16.19
Aggregate net short position time series for ATOSSA THERAPEUTICS, INC.

Markers along the chart's base: ▲ results announced (an 8-K reporting results was filed) ▲ quarterly or annual report filed. Dates are SEC filing dates; hover a point to see events since the previous settlement.

Days to cover

FINRA's own figure: reported shares short divided by the stock's average daily trading volume, published alongside each settlement. It expresses the short position in days of typical trading rather than as a percentage of the company; the two can move differently.

Aggregate net short position time series for ATOSSA THERAPEUTICS, INC. days to cover

Short interest around results

For each results announcement (an 8-K reporting results, by its SEC filing date), the FINRA settlement before it and the first one after. Settlements fall twice a month, so the two figures can sit up to a month apart and much else changes in between: this shows what was reported, not why.

Reported short interest before and after each results announcement
Results filedSettlement beforeSettlement afterChange
7 Aug 20267.62% 31 Jul 20267.97% 14 Aug 2026+0.35
9 Jan 20261.79% 31 Dec 20252.80% 15 Jan 2026+1.01
12 Nov 20251.02% 31 Oct 20251.07% 14 Nov 2025+0.05
12 Aug 20252.95% 31 Jul 20252.83% 15 Aug 2025−0.12
13 May 20255.52% 30 Apr 20255.53% 15 May 2025+0.01
25 Mar 20256.82% 14 Mar 20256.27% 31 Mar 2025−0.55
12 Nov 202410.15% 31 Oct 20249.90% 15 Nov 2024−0.25
12 Aug 202410.11% 31 Jul 202410.23% 15 Aug 2024+0.12

Fails to deliver

The SEC's fails-to-deliver figure for ATOS: the aggregate net balance of shares that failed to be delivered at each settlement date, published by the SEC twice a month and shown here verbatim for the trailing window. A balance is not a daily flow, and a fail has many ordinary causes; the SEC says it cannot guarantee the accuracy of the data. See what fails to deliver are and the largest balances today.

Last balance on file
275
9 Sep 2026
Highest in window
50,625
3 Feb 2026
Days with a balance
77
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for ATOSSA THERAPEUTICS, INC. fails to deliver

Source: U.S. Securities and Exchange Commission, fails-to-deliver data (public domain). Only settlement days with a positive balance appear; the largest balance in the window was 51K shares.

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Sector: Healthcare · By year: 2018 · 2019 · 2020 · 2021 · 2022 · 2023 · 2024 · 2025 · 2026

History

Full reported short interest history
Settlement dateShort %Change
15 Sep 20267.64%+0.07
31 Aug 20267.57%−0.40
14 Aug 20267.97%+0.35
31 Jul 20267.62%−1.39
15 Jul 20269.01%+0.83
30 Jun 20268.18%+1.99
15 Jun 20266.19%+1.53
29 May 20264.66%+0.70
15 May 20263.96%+0.04
30 Apr 20263.92%−0.17
15 Apr 20264.09%+0.28
31 Mar 20263.81%+0.17
30 Jan 20263.64%+0.84
15 Jan 20262.80%+1.01
31 Dec 20251.79%+0.02
15 Dec 20251.77%+0.57
28 Nov 20251.20%+0.13
14 Nov 20251.07%+0.05
31 Oct 20251.02%−0.04
15 Oct 20251.06%−0.76
30 Sep 20251.82%−0.35
15 Sep 20252.17%−0.60
29 Aug 20252.77%−0.06
15 Aug 20252.83%−0.12
31 Jul 20252.95%−0.21
15 Jul 20253.16%−0.45
30 Jun 20253.61%−2.13
13 Jun 20255.74%−0.16
30 May 20255.90%+0.37
15 May 20255.53%+0.01
30 Apr 20255.52%−0.38
15 Apr 20255.90%−0.37
31 Mar 20256.27%−0.55
14 Mar 20256.82%−0.23
28 Feb 20257.05%−0.10
14 Feb 20257.15%−0.20
31 Jan 20257.35%+0.41
15 Jan 20256.94%+0.13
31 Dec 20246.81%+0.29
13 Dec 20246.52%−2.70
29 Nov 20249.22%−0.68
15 Nov 20249.90%−0.25
31 Oct 202410.15%−0.23
15 Oct 202410.38%+0.10
30 Sep 202410.28%−0.20
13 Sep 202410.48%+0.22
30 Aug 202410.26%+0.03
15 Aug 202410.23%+0.12
31 Jul 202410.11%+0.30
15 Jul 20249.81%+1.63
28 Jun 20248.18%−0.48
14 Jun 20248.66%−0.26
31 May 20248.92%−0.21
15 May 20249.13%0.00
30 Apr 20249.13%−0.73
15 Apr 20249.86%+1.43
28 Mar 20248.43%+1.66
15 Mar 20246.77%+1.06
29 Feb 20245.71%+0.10
15 Feb 20245.61%+0.15
31 Jan 20245.46%−0.11
12 Jan 20245.57%+0.50
29 Dec 20235.07%+0.04
15 Dec 20235.03%+0.05
30 Nov 20234.98%−0.10
15 Nov 20235.08%−0.21
31 Oct 20235.29%−0.31
13 Oct 20235.60%−0.17
29 Sep 20235.77%−0.55
15 Sep 20236.32%−0.20
31 Aug 20236.52%−0.12
15 Aug 20236.64%−0.07
31 Jul 20236.71%−0.18
14 Jul 20236.89%+0.77
30 Jun 20236.12%+0.39
15 Jun 20235.73%−0.21
31 May 20235.94%−0.20
15 May 20236.14%−0.24
28 Apr 20236.38%−0.20
14 Apr 20236.58%−0.09
31 Mar 20236.67%−0.13
15 Mar 20236.80%+0.05
28 Feb 20236.75%−0.15
15 Feb 20236.90%−0.04
31 Jan 20236.94%−0.23
13 Jan 20237.17%−0.13
30 Dec 20227.30%−0.27
15 Dec 20227.57%−0.34
30 Nov 20227.91%−0.34
15 Nov 20228.25%−0.02
31 Oct 20228.27%−0.10
14 Oct 20228.37%−0.52
30 Sep 20228.89%−0.13
15 Sep 20229.02%−0.27
31 Aug 20229.29%−0.11
15 Aug 20229.40%−0.37
29 Jul 20229.77%−0.19
15 Jul 20229.96%−0.38
30 Jun 202210.34%−2.33
15 Jun 202212.67%−0.16
31 May 202212.83%−0.71
13 May 202213.54%−1.74
29 Apr 202215.28%+1.24
14 Apr 202214.04%+0.23
31 Mar 202213.81%−0.38
15 Mar 202214.19%+0.98
28 Feb 202213.21%−0.14
15 Feb 202213.35%+0.29
31 Jan 202213.06%−0.49
14 Jan 202213.55%−0.11
31 Dec 202113.66%−0.54
15 Dec 202114.20%0.00
30 Nov 202114.20%−0.45
15 Nov 202114.65%−0.51
29 Oct 202115.16%−1.40
15 Oct 202116.56%−1.03
30 Sep 202117.59%−1.11
15 Sep 202118.70%−0.73
31 Aug 202119.43%+0.74
13 Aug 202118.69%−7.20
30 Jul 202125.89%+4.60
15 Jul 202121.29%+4.30
30 Jun 202116.99%+3.31
15 Jun 202113.68%+2.29
28 May 202111.39%+0.31
14 May 202111.08%+0.08
30 Apr 202111.00%+2.32
15 Apr 20218.68%+0.37
31 Mar 20218.31%+1.99
31 Dec 20206.32%+2.08
30 Nov 20204.24%+1.47
13 Nov 20202.77%+0.85
30 Oct 20201.92%+0.26
15 Oct 20201.66%−0.30
30 Sep 20201.96%+0.69
15 Sep 20201.27%−0.69
31 Aug 20201.96%−0.50
14 Aug 20202.46%+0.51
31 Jul 20201.95%+0.10
15 Jul 20201.85%−0.27
30 Jun 20202.12%−0.46
15 Jun 20202.58%−0.77
29 May 20203.35%+1.07
15 May 20202.28%−0.53
30 Apr 20202.81%+0.19
15 Apr 20202.62%−0.03
31 Mar 20202.65%+0.16
13 Mar 20202.49%+0.01
28 Feb 20202.48%−0.06
14 Feb 20202.54%−0.06
31 Jan 20202.60%−1.03
15 Jan 20203.63%−0.08
31 Dec 20193.71%+0.06
13 Dec 20193.65%+0.03
29 Nov 20193.62%−0.51
15 Nov 20194.13%+0.22
31 Oct 20193.91%+0.72
15 Oct 20193.19%+0.77
30 Sep 20192.42%−0.58
13 Sep 20193.00%+0.08
30 Aug 20192.92%−0.50
15 Aug 20193.42%−1.83
31 Jul 20195.25%−1.49
15 Jul 20196.74%+2.84
28 Jun 20193.90%+0.46
14 Jun 20193.44%+0.02
31 May 20193.42%+0.42
15 May 20193.00%−3.49
30 Apr 20196.49%+2.16
15 Apr 20194.33%−5.29
29 Mar 20199.62%+2.77
15 Mar 20196.85%−1.51
28 Feb 20198.36%−1.27
15 Feb 20199.63%+1.16
31 Jan 20198.47%−1.59
15 Jan 201910.06%+3.24
31 Dec 20186.82%−0.75
14 Dec 20187.57%+0.65
30 Nov 20186.92%−0.53
15 Nov 20187.45%−2.32
31 Oct 20189.77%+0.01
15 Oct 20189.76%+0.44
28 Sep 20189.32%+1.25
14 Sep 20188.07%+1.50
31 Aug 20186.57%+0.41
15 Aug 20186.16%−4.16
13 Apr 201810.32%−0.83
29 Mar 201811.15%+1.68
15 Mar 20189.47%−0.43
28 Feb 20189.90%−1.31
15 Feb 201811.21%+3.48
31 Jan 20187.73%+1.99
12 Jan 20185.74%−0.11
29 Dec 20175.85%–

Newest first. Scroll inside the table for earlier dates, back to 29 Dec 2017.

Frequently asked questions

How shorted is ATOSSA THERAPEUTICS, INC. right now?
7.64% of ATOSSA THERAPEUTICS, INC.'s (ATOS) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 1,048th most shorted US stock, out of 3,805 we rank.
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.
Is this ATOS's short float?
No. This is short interest as a percentage of shares outstanding, the count in the company's SEC filings. "Short float" divides the same FINRA short count by the public float, which excludes closely held shares, so it comes out higher for the same company. We publish no float estimates: the float is not a regulatory figure.
What is ATOS's days to cover?
16.19 days for settlement date 15 Sep 2026: FINRA's own short interest ratio, the reported shares short divided by average daily trading volume. It is published in the same FINRA file and shown verbatim; we hold no volume data ourselves.
Which funds are short?
US public short interest is aggregate-only: individual short sellers are not named. Only some EU markets publish named positions.