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HowShorted

How shorted is MasTec, Inc.? MTZ

#1,207most shorted US stockof 3,805 ranked stocks, more shorted than 68%

6.75%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
+0.14
5 reports (~10 weeks)
+1.18
days to cover
4.09
Aggregate net short position time series for MasTec, 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 MasTec, 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
30 Jul 20265.36% 15 Jul 20265.51% 31 Jul 2026+0.15
30 Apr 20263.82% 15 Apr 20264.10% 15 May 2026+0.28
26 Feb 20263.11% 13 Feb 20263.26% 27 Feb 2026+0.15
30 Oct 20252.27% 15 Oct 20252.10% 31 Oct 2025−0.17
31 Jul 20251.54% 15 Jul 20251.95% 15 Aug 2025+0.41
2 May 20252.21% 30 Apr 20251.86% 15 May 2025−0.35
28 Feb 20252.20% 14 Feb 20252.42% 14 Mar 2025+0.22
31 Oct 20243.19% 15 Oct 20242.65% 15 Nov 2024−0.54

Fails to deliver

The SEC's fails-to-deliver figure for MTZ: 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
5,912
11 Sep 2026
Highest in window
49,586
22 Jun 2026
Days with a balance
36
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for MasTec, 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 50K shares.

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Sector: Industrials

History

Full reported short interest history
Settlement dateShort %Change
15 Sep 20266.75%+0.14
31 Aug 20266.61%+0.07
14 Aug 20266.54%+1.03
31 Jul 20265.51%+0.15
15 Jul 20265.36%−0.21
30 Jun 20265.57%+0.91
15 Jun 20264.66%+0.44
29 May 20264.22%+0.12
15 May 20264.10%+0.17
30 Apr 20263.93%+0.11
15 Apr 20263.82%+0.23
31 Mar 20263.59%+0.34
13 Mar 20263.25%−0.01
27 Feb 20263.26%+0.15
13 Feb 20263.11%−0.46
30 Jan 20263.57%−0.28
15 Jan 20263.85%+0.78
31 Dec 20253.07%−0.47
15 Dec 20253.54%+0.01
28 Nov 20253.53%+1.03
14 Nov 20252.50%+0.40
31 Oct 20252.10%−0.17
15 Oct 20252.27%+0.20
30 Sep 20252.07%−0.01
15 Sep 20252.08%−0.08
29 Aug 20252.16%+0.21
15 Aug 20251.95%+0.47
31 Jul 20251.48%−0.06
15 Jul 20251.54%+0.46
30 Jun 20251.08%−0.35
13 Jun 20251.43%+0.14
30 May 20251.29%−0.57
15 May 20251.86%−0.35
30 Apr 20252.21%+0.55
15 Apr 20251.66%+0.17
31 Mar 20251.49%−0.93
14 Mar 20252.42%+0.06
28 Feb 20252.36%+0.16
14 Feb 20252.20%−0.31
31 Jan 20252.51%−0.15
15 Jan 20252.66%+0.21
31 Dec 20242.45%−0.42
13 Dec 20242.87%+0.32
29 Nov 20242.55%−0.10
15 Nov 20242.65%−0.21
31 Oct 20242.86%−0.33
15 Oct 20243.19%−0.27
30 Sep 20243.46%−0.05
13 Sep 20243.51%+0.08
30 Aug 20243.43%+0.18
15 Aug 20243.25%+0.04
31 Jul 20243.21%−0.55
15 Jul 20243.76%−0.51
28 Jun 20244.27%+0.64
14 Jun 20243.63%−0.07
31 May 20243.70%−0.35
15 May 20244.05%+0.12
30 Apr 20243.93%+0.28
15 Apr 20243.65%−0.31
28 Mar 20243.96%−0.35
15 Mar 20244.31%−0.80
29 Feb 20245.11%+0.08
15 Feb 20245.03%−0.14
31 Jan 20245.17%−0.06
12 Jan 20245.23%−0.02
29 Dec 20235.25%0.00
15 Dec 20235.25%+0.35
30 Nov 20234.90%−0.19
15 Nov 20235.09%+0.57
31 Oct 20234.52%+0.71
13 Oct 20233.81%+0.37
29 Sep 20233.44%−0.18
15 Sep 20233.62%−0.19
31 Aug 20233.81%+0.16
15 Aug 20233.65%+0.21
31 Jul 20233.44%+0.07
14 Jul 20233.37%−0.18
30 Jun 20233.55%−0.15
15 Jun 20233.70%+0.22
31 May 20233.48%+0.42
15 May 20233.06%+0.10
28 Apr 20232.96%0.00
14 Apr 20232.96%−0.04
31 Mar 20233.00%−0.05
15 Mar 20233.05%0.00
28 Feb 20233.05%+0.02
15 Feb 20233.03%+0.21
31 Jan 20232.82%−0.21
13 Jan 20233.03%−0.44
30 Dec 20223.47%+0.78
15 Dec 20222.69%+0.06
30 Nov 20222.63%−0.03
15 Nov 20222.66%−0.89
31 Oct 20223.55%−0.79
14 Oct 20224.34%+0.48
30 Sep 20223.86%−0.03
15 Sep 20223.89%+0.45
31 Aug 20223.44%+0.37
15 Aug 20223.07%+0.07
29 Jul 20223.00%−0.08
15 Jul 20223.08%+0.13
30 Jun 20222.95%−0.37
15 Jun 20223.32%+0.12
31 May 20223.20%+0.30
13 May 20222.90%+0.56
29 Apr 20222.34%+0.08
14 Apr 20222.26%+0.17
31 Mar 20222.09%−0.11
15 Mar 20222.20%−1.08
28 Feb 20223.28%−0.10
15 Feb 20223.38%−0.11
31 Jan 20223.49%−0.25
14 Jan 20223.74%+0.03
31 Dec 20213.71%−0.10
15 Dec 20213.81%−0.78
30 Nov 20214.59%+0.25
15 Nov 20214.34%−0.33
29 Oct 20214.67%−0.10
15 Oct 20214.77%+0.26
30 Sep 20214.51%+0.30
15 Sep 20214.21%+0.09
31 Aug 20214.12%+0.17
13 Aug 20213.95%+0.08
30 Jul 20213.87%−0.41
15 Jul 20214.28%−0.40
30 Jun 20214.68%−1.32
15 Jun 20216.00%−1.13
28 May 20217.13%+0.42
14 May 20216.71%−0.36
30 Apr 20217.07%−0.18
15 Apr 20217.25%−0.43
31 Mar 20217.68%−1.32
15 Mar 20219.00%−0.12
26 Feb 20219.12%−0.54
12 Feb 20219.66%−0.74
29 Jan 202110.40%−0.54
15 Jan 202110.94%−0.15
31 Dec 202011.09%−0.73
15 Dec 202011.82%−0.49
30 Nov 202012.31%+0.15
13 Nov 202012.16%+0.32
30 Oct 202011.84%−0.02
15 Oct 202011.86%−1.14
30 Sep 202013.00%−0.83
15 Sep 202013.83%+0.19
31 Aug 202013.64%−0.15
14 Aug 202013.79%−0.10
31 Jul 202013.89%−0.28
15 Jul 202014.17%+0.24
30 Jun 202013.93%+0.94
15 Jun 202012.99%+0.45
29 May 202012.54%+1.00
15 May 202011.54%+0.90
30 Apr 202010.64%+0.14
15 Apr 202010.50%+0.31
31 Mar 202010.19%−0.07
13 Mar 202010.26%−0.28
28 Feb 202010.54%−0.30
14 Feb 202010.84%+0.04
31 Jan 202010.80%−0.34
15 Jan 202011.14%−0.36
31 Dec 201911.50%−0.02
13 Dec 201911.52%+0.13
29 Nov 201911.39%−0.47
15 Nov 201911.86%−0.28
31 Oct 201912.14%+0.61
15 Oct 201911.53%−0.92
30 Sep 201912.45%−0.17
13 Sep 201912.62%−0.97
30 Aug 201913.59%+0.51
15 Aug 201913.08%−2.55
31 Jul 201915.63%−0.58
15 Jul 201916.21%+1.16
28 Jun 201915.05%+0.13
14 Jun 201914.92%−0.41
31 May 201915.33%+2.58
15 May 201912.75%−0.32
30 Apr 201913.07%−0.29
15 Apr 201913.36%−0.66
29 Mar 201914.02%−0.10
15 Mar 201914.12%−0.04
28 Feb 201914.16%−1.26
15 Feb 201915.42%+1.75
31 Jan 201913.67%−0.67
15 Jan 201914.34%−0.67
31 Dec 201815.01%−0.66
14 Dec 201815.67%+1.50
30 Nov 201814.17%−0.19
15 Nov 201814.36%+1.91
31 Oct 201812.45%−0.16
15 Oct 201812.61%−0.81
28 Sep 201813.42%+1.35
14 Sep 201812.07%+1.22
31 Aug 201810.85%−0.09
15 Aug 201810.94%−0.90
31 Jul 201811.84%+0.89
13 Jul 201810.95%−0.69
29 Jun 201811.64%+0.67
15 Jun 201810.97%−0.02
31 May 201810.99%−0.05
15 May 201811.04%+0.34
30 Apr 201810.70%+0.28
13 Apr 201810.42%−0.45
29 Mar 201810.87%+0.31
15 Mar 201810.56%+0.68
28 Feb 20189.88%+0.86
15 Feb 20189.02%+0.15
31 Jan 20188.87%−0.47
12 Jan 20189.34%+0.12
29 Dec 20179.22%–

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

Frequently asked questions

How shorted is MasTec, Inc. right now?
6.75% of MasTec, Inc.'s (MTZ) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 1,207th 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 MTZ'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 MTZ's days to cover?
4.09 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.