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HowShorted

How shorted is AST SpaceMobile, Inc. Class A? ASTS

#223most shorted US stockof 3,805 ranked stocks, more shorted than 94%

16.77%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
+0.29
5 reports (~10 weeks)
+0.10
days to cover
6.93
Aggregate net short position time series for AST SpaceMobile, Inc. Class A

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 AST SpaceMobile, Inc. Class A 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
10 Aug 202614.65% 31 Jul 202614.77% 14 Aug 2026+0.12
15 Jul 202616.67% 30 Jun 202614.65% 31 Jul 2026−2.02
11 May 202614.13% 30 Apr 202613.50% 15 May 2026−0.63
2 Mar 202610.96% 27 Feb 202611.99% 13 Mar 2026+1.03
11 Feb 202611.13% 30 Jan 202611.72% 13 Feb 2026+0.59
10 Nov 202510.50% 31 Oct 202510.53% 14 Nov 2025+0.03
21 Oct 202510.35% 15 Oct 202510.50% 31 Oct 2025+0.15
11 Aug 202512.59% 31 Jul 202511.71% 15 Aug 2025−0.88

Fails to deliver

The SEC's fails-to-deliver figure for ASTS: 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.

Latest balance
100,073
14 Sep 2026
Highest in window
1,132,687
29 Jun 2026
Days with a balance
180
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for AST SpaceMobile, Inc. Class A 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 1.1M shares.

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Sector: Media & telecom · By year: 2021 · 2022 · 2023 · 2024 · 2025 · 2026

History

Full reported short interest history
Settlement dateShort %Change
15 Sep 202616.77%+0.29
31 Aug 202616.48%+1.71
14 Aug 202614.77%+0.12
31 Jul 202614.65%−0.64
15 Jul 202615.29%−1.38
30 Jun 202616.67%+0.57
15 Jun 202616.10%+1.99
29 May 202614.11%+0.61
15 May 202613.50%−0.63
30 Apr 202614.13%+1.40
15 Apr 202612.73%+0.63
31 Mar 202612.10%+0.11
13 Mar 202611.99%+1.03
27 Feb 202610.96%−0.76
13 Feb 202611.72%+0.59
30 Jan 202611.13%+0.37
15 Jan 202610.76%+0.39
31 Dec 202510.37%−0.02
15 Dec 202510.39%+0.41
28 Nov 20259.98%−0.55
14 Nov 202510.53%+0.03
31 Oct 202510.50%+0.15
15 Oct 202510.35%−1.48
30 Sep 202511.83%+0.18
15 Sep 202511.65%+0.61
29 Aug 202511.04%−0.67
15 Aug 202511.71%−0.88
31 Jul 202512.59%−0.05
15 Jul 202512.64%−1.09
30 Jun 202513.73%−0.51
13 Jun 202514.24%+0.15
30 May 202514.09%+0.75
15 May 202513.34%−0.09
30 Apr 202513.43%−0.27
15 Apr 202513.70%−1.60
31 Mar 202515.30%+0.30
14 Mar 202515.00%+0.69
28 Feb 202514.31%−33.15
14 Feb 202547.46%−0.35
31 Jan 202547.81%+11.06
15 Jan 202536.75%−2.72
31 Dec 202439.47%+1.63
13 Dec 202437.84%−1.80
29 Nov 202439.64%−1.49
15 Nov 202441.13%+9.02
31 Oct 202432.11%−0.72
15 Oct 202432.83%−2.42
30 Sep 202435.25%+2.45
13 Sep 202432.80%+12.91
30 Aug 202419.89%−4.29
15 Aug 202424.18%+2.04
31 Jul 202422.14%−0.52
15 Jul 202422.66%−0.22
28 Jun 202422.88%+1.34
14 Jun 202421.54%−3.31
31 May 202424.85%−1.99
15 May 202426.84%+14.07
30 Apr 202412.77%+0.46
15 Apr 202412.31%+1.52
28 Mar 202410.79%+0.94
15 Mar 20249.85%+2.22
29 Feb 20247.63%+1.54
15 Feb 20246.09%+0.33
31 Jan 20245.76%−2.59
12 Jan 20248.35%+0.19
29 Dec 20238.16%+0.23
15 Dec 20237.93%−0.37
30 Nov 20238.30%+0.05
15 Nov 20238.25%+0.17
31 Oct 20238.08%−0.72
13 Oct 20238.80%−0.22
29 Sep 20239.02%+1.09
15 Sep 20237.93%−0.57
31 Aug 20238.50%+0.88
15 Aug 20237.62%−1.07
31 Jul 20238.69%+0.12
14 Jul 20238.57%−0.44
30 Jun 20239.01%+0.77
15 Jun 20238.24%−0.09
31 May 20238.33%−0.02
15 May 20238.35%−0.13
28 Apr 20238.48%+1.02
14 Apr 20237.46%−0.16
31 Mar 20237.62%−0.24
15 Mar 20237.86%+0.41
28 Feb 20237.45%−0.13
15 Feb 20237.58%+0.61
31 Jan 20236.97%−0.40
13 Jan 20237.37%−0.29
30 Dec 20227.66%+0.61
15 Dec 20227.05%−0.34
30 Nov 20227.39%+0.28
15 Nov 20227.11%+0.01
31 Oct 20227.10%+0.37
14 Oct 20226.73%+0.18
30 Sep 20226.55%+0.05
15 Sep 20226.50%+0.80
31 Aug 20225.70%−0.54
15 Aug 20226.24%−0.11
29 Jul 20226.35%+0.07
15 Jul 20226.28%−0.03
30 Jun 20226.31%+0.38
15 Jun 20225.93%+0.70
31 May 20225.23%+0.12
13 May 20225.11%+0.71
29 Apr 20224.40%+0.25
14 Apr 20224.15%+0.03
31 Mar 20224.12%−0.63
15 Mar 20224.75%−0.04
28 Feb 20224.79%−0.09
15 Feb 20224.88%+0.29
31 Jan 20224.59%+0.57
14 Jan 20224.02%+0.59
31 Dec 20213.43%+0.09
15 Dec 20213.34%+0.29
30 Nov 20213.05%−0.06
15 Nov 20213.11%+0.01
29 Oct 20213.10%−0.08
15 Oct 20213.18%+0.19
30 Sep 20212.99%+0.27
15 Sep 20212.72%0.00
31 Aug 20212.72%+0.87
13 Aug 20211.85%–

Newest first. Scroll inside the table for earlier dates, back to 13 Aug 2021.

Frequently asked questions

How shorted is AST SpaceMobile, Inc. Class A right now?
16.77% of AST SpaceMobile, Inc. Class A's (ASTS) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 223rd 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 ASTS'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 ASTS's days to cover?
6.93 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.