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HowShorted

How shorted is Applied Optoelectronics, Inc.? AAOI

#304most shorted US stockof 3,805 ranked stocks, more shorted than 92%

14.55%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
+0.26
5 reports (~10 weeks)
+1.15
days to cover
1.97
Aggregate net short position time series for Applied Optoelectronics, 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 Applied Optoelectronics, 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
6 Aug 202613.00% 31 Jul 202612.32% 14 Aug 2026−0.68
7 May 202613.47% 30 Apr 202611.63% 15 May 2026−1.84
26 Feb 202614.12% 13 Feb 202614.04% 27 Feb 2026−0.08
6 Nov 202519.60% 31 Oct 202518.86% 14 Nov 2025−0.74
7 Aug 202521.29% 31 Jul 202519.14% 15 Aug 2025−2.15
8 May 202521.50% 30 Apr 202519.03% 15 May 2025−2.47
26 Feb 202519.35% 14 Feb 202519.38% 28 Feb 2025+0.03
7 Nov 202426.44% 31 Oct 202421.81% 15 Nov 2024−4.63

Fails to deliver

The SEC's fails-to-deliver figure for AAOI: 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
708
14 Sep 2026
Highest in window
1,286,324
3 Mar 2026
Days with a balance
118
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Applied Optoelectronics, 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 1.3M shares.

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History

Full reported short interest history
Settlement dateShort %Change
15 Sep 202614.55%+0.26
31 Aug 202614.29%+1.97
14 Aug 202612.32%−0.68
31 Jul 202613.00%+0.62
15 Jul 202612.38%−1.02
30 Jun 202613.40%+0.65
15 Jun 202612.75%+0.24
29 May 202612.51%+0.88
15 May 202611.63%−1.84
30 Apr 202613.47%0.00
15 Apr 202613.47%+1.26
31 Mar 202612.21%−1.49
13 Mar 202613.70%−0.34
27 Feb 202614.04%−0.08
13 Feb 202614.12%−2.82
30 Jan 202616.94%−0.66
15 Jan 202617.60%−0.32
31 Dec 202517.92%−0.69
15 Dec 202518.61%−2.46
28 Nov 202521.07%+2.21
14 Nov 202518.86%−0.74
31 Oct 202519.60%−1.33
15 Oct 202520.93%−0.75
30 Sep 202521.68%+2.11
15 Sep 202519.57%−1.23
29 Aug 202520.80%+1.66
15 Aug 202519.14%−2.15
31 Jul 202521.29%+0.01
15 Jul 202521.28%−1.11
30 Jun 202522.39%+0.76
13 Jun 202521.63%+1.97
30 May 202519.66%+0.63
15 May 202519.03%−2.47
30 Apr 202521.50%+2.18
15 Apr 202519.32%+0.21
31 Mar 202519.11%−0.49
14 Mar 202519.60%+0.22
28 Feb 202519.38%+0.03
14 Feb 202519.35%−1.84
31 Jan 202521.19%+2.43
15 Jan 202518.76%+0.09
31 Dec 202418.67%−2.54
13 Dec 202421.21%+0.64
29 Nov 202420.57%−1.24
15 Nov 202421.81%−4.63
31 Oct 202426.44%−0.27
15 Oct 202426.71%−0.24
30 Sep 202426.95%−0.96
13 Sep 202427.91%+0.67
30 Aug 202427.24%+1.83
15 Aug 202425.41%+0.41
31 Jul 202425.00%−1.03
15 Jul 202426.03%−0.48
28 Jun 202426.51%+0.33
14 Jun 202426.18%−0.14
31 May 202426.32%+0.92
15 May 202425.40%+2.42
30 Apr 202422.98%−1.01
15 Apr 202423.99%+0.27
28 Mar 202423.72%+0.65
15 Mar 202423.07%−0.76
29 Feb 202423.83%+1.10
15 Feb 202422.73%+0.69
31 Jan 202422.04%−0.31
12 Jan 202422.35%−0.39
29 Dec 202322.74%−3.81
15 Dec 202326.55%+1.56
30 Nov 202324.99%+0.99
15 Nov 202324.00%+0.84
31 Oct 202323.16%+0.20
13 Oct 202322.96%+1.29
29 Sep 202321.67%+0.41
15 Sep 202321.26%+2.83
31 Aug 202318.43%−0.55
15 Aug 202318.98%−0.65
31 Jul 202319.63%−2.48
14 Jul 202322.11%+4.58
30 Jun 202317.53%+5.35
15 Jun 202312.18%+1.54
31 May 202310.64%+0.21
15 May 202310.43%+0.09
28 Apr 202310.34%−0.29
14 Apr 202310.63%+0.01
31 Mar 202310.62%−0.15
15 Mar 202310.77%−0.24
28 Feb 202311.01%−0.08
15 Feb 202311.09%−0.23
31 Jan 202311.32%−0.35
13 Jan 202311.67%−0.05
30 Dec 202211.72%−0.11
15 Dec 202211.83%+0.25
30 Nov 202211.58%−0.05
15 Nov 202211.63%−0.79
31 Oct 202212.42%+0.02
14 Oct 202212.40%−0.35
30 Sep 202212.75%−1.83
15 Sep 202214.58%−0.02
31 Aug 202214.60%−0.17
15 Aug 202214.77%−0.24
29 Jul 202215.01%−0.13
15 Jul 202215.14%+0.08
30 Jun 202215.06%+0.21
15 Jun 202214.85%+0.29
31 May 202214.56%+0.05
13 May 202214.51%+0.39
29 Apr 202214.12%+0.28
14 Apr 202213.84%−0.93
31 Mar 202214.77%−0.24
15 Mar 202215.01%+0.31
28 Feb 202214.70%+0.69
15 Feb 202214.01%+1.00
31 Jan 202213.01%−1.32
14 Jan 202214.33%+0.44
31 Dec 202113.89%+1.18
15 Dec 202112.71%+0.20
30 Nov 202112.51%−0.19
15 Nov 202112.70%−3.76
29 Oct 202116.46%−0.11
15 Oct 202116.57%−0.27
30 Sep 202116.84%+0.31
15 Sep 202116.53%−0.06
31 Aug 202116.59%+2.04
13 Aug 202114.55%−0.27
30 Jul 202114.82%+0.44
15 Jul 202114.38%−0.20
30 Jun 202114.58%−2.35
15 Jun 202116.93%+0.99
28 May 202115.94%+0.21
14 May 202115.73%+1.50
30 Apr 202114.23%−1.71
15 Apr 202115.94%−1.08
31 Mar 202117.02%+1.75
15 Mar 202115.27%+1.53
26 Feb 202113.74%−1.30
12 Feb 202115.04%−0.50
29 Jan 202115.54%−1.09
15 Jan 202116.63%−1.15
31 Dec 202017.78%−1.00
15 Dec 202018.78%−0.65
30 Nov 202019.43%+0.72
13 Nov 202018.71%+0.10
30 Oct 202018.61%−0.75
15 Oct 202019.36%−0.39
30 Sep 202019.75%−0.65
15 Sep 202020.40%+0.78
31 Aug 202019.62%−2.25
14 Aug 202021.87%−2.13
31 Jul 202024.00%−2.47
15 Jul 202026.47%+0.47
30 Jun 202026.00%−0.59
15 Jun 202026.59%−0.69
29 May 202027.28%−5.01
15 May 202032.29%−2.84
30 Apr 202035.13%+0.01
15 Apr 202035.12%−1.12
31 Mar 202036.24%−3.23
13 Mar 202039.47%+2.80
28 Feb 202036.67%−0.48
14 Feb 202037.15%+2.29
31 Jan 202034.86%−2.28
15 Jan 202037.14%+1.26
31 Dec 201935.88%−2.49
13 Dec 201938.37%−1.27
29 Nov 201939.64%−0.80
15 Nov 201940.44%+3.72
31 Oct 201936.72%−3.00
15 Oct 201939.72%+1.40
30 Sep 201938.32%−0.30
13 Sep 201938.62%−0.55
30 Aug 201939.17%−0.57
15 Aug 201939.74%+0.57
31 Jul 201939.17%−1.16
15 Jul 201940.33%+0.20
28 Jun 201940.13%−0.23
14 Jun 201940.36%−1.39
31 May 201941.75%+1.87
15 May 201939.88%+0.18
30 Apr 201939.70%−1.33
15 Apr 201941.03%+0.07
29 Mar 201940.96%−0.39
15 Mar 201941.35%+6.67
28 Feb 201934.68%+2.10
15 Feb 201932.58%+4.53
31 Jan 201928.05%+0.15
15 Jan 201927.90%−4.19
31 Dec 201832.09%−4.77
14 Dec 201836.86%+1.55
30 Nov 201835.31%−1.49
15 Nov 201836.80%+0.14
31 Oct 201836.66%−4.06
15 Oct 201840.72%−1.26
28 Sep 201841.98%+5.70
14 Sep 201836.28%+1.77
31 Aug 201834.51%−12.28
15 Aug 201846.79%−9.09
31 Jul 201855.88%−2.34
13 Jul 201858.22%−0.95
29 Jun 201859.17%−8.15
15 Jun 201867.32%−9.79
31 May 201877.11%+2.80
15 May 201874.31%−6.55
30 Apr 201880.86%+5.98
13 Apr 201874.88%−0.16
29 Mar 201875.04%+7.19
15 Mar 201867.85%+7.53
28 Feb 201860.32%−0.24
15 Feb 201860.56%−3.37
31 Jan 201863.93%+7.43
12 Jan 201856.50%+0.39
29 Dec 201756.11%–

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

Frequently asked questions

How shorted is Applied Optoelectronics, Inc. right now?
14.55% of Applied Optoelectronics, Inc.'s (AAOI) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 304th 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 AAOI'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 AAOI's days to cover?
1.97 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.