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HowShorted

How shorted is Ultra Clean Holdings, Inc.? UCTT

#987most shorted US stockof 3,805 ranked stocks, more shorted than 74%

7.99%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
+0.01
5 reports (~10 weeks)
+0.80
days to cover
4.39
Aggregate net short position time series for Ultra Clean Holdings, 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 Ultra Clean Holdings, 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
3 Aug 20267.38% 31 Jul 20266.97% 14 Aug 2026−0.41
28 Oct 20253.42% 15 Oct 20253.14% 31 Oct 2025−0.28
28 Jul 20253.21% 15 Jul 20253.12% 31 Jul 2025−0.09
28 Apr 20252.96% 15 Apr 20253.29% 30 Apr 2025+0.33
24 Feb 20252.18% 14 Feb 20252.21% 28 Feb 2025+0.03
28 Oct 20241.90% 15 Oct 20242.22% 31 Oct 2024+0.32
27 Jul 20231.81% 14 Jul 20232.08% 31 Jul 2023+0.27
26 Apr 20232.56% 14 Apr 20232.49% 28 Apr 2023−0.07

Fails to deliver

The SEC's fails-to-deliver figure for UCTT: 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
754
11 Sep 2026
Highest in window
51,989
16 Jan 2026
Days with a balance
56
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Ultra Clean Holdings, 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 52K shares.

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

History

Full reported short interest history
Settlement dateShort %Change
15 Sep 20267.99%+0.01
31 Aug 20267.98%+1.01
14 Aug 20266.97%−0.41
31 Jul 20267.38%−0.55
15 Jul 20267.93%+0.74
30 Jun 20267.19%−0.62
15 Jun 20267.81%+0.95
29 May 20266.86%+0.34
15 May 20266.52%+1.11
30 Apr 20265.41%−0.36
15 Apr 20265.77%−0.56
31 Mar 20266.33%−0.35
13 Mar 20266.68%+1.12
27 Feb 20265.56%+0.90
13 Feb 20264.66%−0.44
30 Jan 20265.10%−0.50
15 Jan 20265.60%+0.78
31 Dec 20254.82%+0.11
15 Dec 20254.71%+0.52
28 Nov 20254.19%+0.69
14 Nov 20253.50%+0.36
31 Oct 20253.14%−0.28
15 Oct 20253.42%−0.10
30 Sep 20253.52%+0.15
15 Sep 20253.37%+0.07
29 Aug 20253.30%−0.10
15 Aug 20253.40%+0.28
31 Jul 20253.12%−0.09
15 Jul 20253.21%+0.36
30 Jun 20252.85%+0.16
13 Jun 20252.69%−0.32
30 May 20253.01%−0.15
15 May 20253.16%−0.13
30 Apr 20253.29%+0.33
15 Apr 20252.96%+0.54
31 Mar 20252.42%−0.01
14 Mar 20252.43%+0.22
28 Feb 20252.21%+0.03
14 Feb 20252.18%−0.30
31 Jan 20252.48%−0.19
15 Jan 20252.67%+0.02
31 Dec 20242.65%+0.04
13 Dec 20242.61%+0.37
29 Nov 20242.24%+0.20
15 Nov 20242.04%−0.18
31 Oct 20242.22%+0.32
15 Oct 20241.90%+0.21
30 Sep 20241.69%+0.22
13 Sep 20241.47%−0.07
30 Aug 20241.54%+0.06
15 Aug 20241.48%+0.19
31 Jul 20241.29%−0.17
15 Jul 20241.46%+0.11
28 Jun 20241.35%−0.12
14 Jun 20241.47%+0.09
31 May 20241.38%+0.02
15 May 20241.36%−0.20
30 Apr 20241.56%−0.25
15 Apr 20241.81%+0.03
28 Mar 20241.78%−0.40
15 Mar 20242.18%+0.01
29 Feb 20242.17%−0.19
15 Feb 20242.36%+0.24
31 Jan 20242.12%+0.39
12 Jan 20241.73%0.00
29 Dec 20231.73%+0.09
15 Dec 20231.64%−0.10
30 Nov 20231.74%+0.17
15 Nov 20231.57%+0.13
31 Oct 20231.44%−0.07
13 Oct 20231.51%−0.17
29 Sep 20231.68%−0.01
15 Sep 20231.69%+0.02
31 Aug 20231.67%−0.29
15 Aug 20231.96%−0.12
31 Jul 20232.08%+0.27
14 Jul 20231.81%−0.19
30 Jun 20232.00%−0.73
15 Jun 20232.73%+0.48
31 May 20232.25%−0.05
15 May 20232.30%−0.19
28 Apr 20232.49%−0.07
14 Apr 20232.56%−0.08
31 Mar 20232.64%−0.18
15 Mar 20232.82%+0.73
28 Feb 20232.09%+0.08
15 Feb 20232.01%+0.17
31 Jan 20231.84%−0.42
13 Jan 20232.26%+0.20
30 Dec 20222.06%+0.25
15 Dec 20221.81%+0.28
30 Nov 20221.53%−0.28
15 Nov 20221.81%−0.31
31 Oct 20222.12%−0.08
14 Oct 20222.20%+0.19
30 Sep 20222.01%+0.01
15 Sep 20222.00%+0.18
31 Aug 20221.82%−0.29
15 Aug 20222.11%−0.47
29 Jul 20222.58%−0.11
15 Jul 20222.69%+0.39
30 Jun 20222.30%−0.05
15 Jun 20222.35%−0.03
31 May 20222.38%−0.23
13 May 20222.61%+0.34
29 Apr 20222.27%+0.01
14 Apr 20222.26%+0.52
31 Mar 20221.74%−0.25
15 Mar 20221.99%−0.09
28 Feb 20222.08%+0.01
15 Feb 20222.07%−0.27
31 Jan 20222.34%+0.74
14 Jan 20221.60%+0.24
31 Dec 20211.36%+0.02
15 Dec 20211.34%−0.16
30 Nov 20211.50%−0.25
15 Nov 20211.75%−0.67
29 Oct 20212.42%+0.07
15 Oct 20212.35%+0.18
30 Sep 20212.17%−0.09
15 Sep 20212.26%+0.06
31 Aug 20212.20%−0.60
13 Aug 20212.80%+0.50
30 Jul 20212.30%+0.12
15 Jul 20212.18%−0.10
30 Jun 20212.28%−0.19
15 Jun 20212.47%−0.18
28 May 20212.65%−0.36
14 May 20213.01%+0.49
30 Apr 20212.52%−0.26
15 Apr 20212.78%−0.48
31 Mar 20213.26%−0.19
15 Mar 20213.45%0.00
26 Feb 20213.45%−0.07
12 Feb 20213.52%+0.17
29 Jan 20213.35%−0.30
15 Jan 20213.65%−0.23
31 Dec 20203.88%−0.87
15 Dec 20204.75%−0.31
30 Nov 20205.06%−0.66
13 Nov 20205.72%−1.35
30 Oct 20207.07%+0.18
15 Oct 20206.89%−0.51
30 Sep 20207.40%+0.03
15 Sep 20207.37%+0.83
31 Aug 20206.54%+0.02
14 Aug 20206.52%−0.39
31 Jul 20206.91%−0.41
15 Jul 20207.32%−0.12
30 Jun 20207.44%+0.28
15 Jun 20207.16%−0.05
29 May 20207.21%−0.20
15 May 20207.41%−0.33
30 Apr 20207.74%−0.54
15 Apr 20208.28%+0.25
31 Mar 20208.03%−0.28
13 Mar 20208.31%+0.14
28 Feb 20208.17%−0.22
14 Feb 20208.39%−0.51
31 Jan 20208.90%−0.14
15 Jan 20209.04%−0.96
31 Dec 201910.00%−0.39
13 Dec 201910.39%+0.05
29 Nov 201910.34%−0.39
15 Nov 201910.73%+0.52
31 Oct 201910.21%−0.54
15 Oct 201910.75%−0.30
30 Sep 201911.05%−0.69
13 Sep 201911.74%−0.39
30 Aug 201912.13%−0.32
15 Aug 201912.45%−0.49
31 Jul 201912.94%−0.67
15 Jul 201913.61%−0.93
28 Jun 201914.54%+0.16
14 Jun 201914.38%−0.98
31 May 201915.36%+1.13
15 May 201914.23%−0.66
30 Apr 201914.89%−0.99
15 Apr 201915.88%−0.45
29 Mar 201916.33%+1.11
15 Mar 201915.22%−3.28
28 Feb 201918.50%−1.56
15 Feb 201920.06%+1.85
31 Jan 201918.21%+0.87
15 Jan 201917.34%+0.49
31 Dec 201816.85%+0.59
14 Dec 201816.26%−0.59
30 Nov 201816.85%+0.26
15 Nov 201816.59%+2.47
31 Oct 201814.12%−0.65
15 Oct 201814.77%+0.43
28 Sep 201814.34%+0.51
14 Sep 201813.83%−1.54
31 Aug 201815.37%+1.70
15 Aug 201813.67%+1.41
31 Jul 201812.26%+0.13
13 Jul 201812.13%+0.39
29 Jun 201811.74%+0.94
15 Jun 201810.80%−1.27
31 May 201812.07%+1.10
15 May 201810.97%+1.32
30 Apr 20189.65%−1.49
13 Apr 201811.14%−0.25
29 Mar 201811.39%−0.49
15 Mar 201811.88%−0.06
28 Feb 201811.94%+1.16
15 Feb 201810.78%+0.81
31 Jan 20189.97%−1.25
12 Jan 201811.22%+6.04
29 Dec 20175.18%–

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

Frequently asked questions

How shorted is Ultra Clean Holdings, Inc. right now?
7.99% of Ultra Clean Holdings, Inc.'s (UCTT) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 987th 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 UCTT'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 UCTT's days to cover?
4.39 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.