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HowShorted

How shorted is Mesa Laboratories, Inc.? MLAB

#1,131most shorted US stockof 3,805 ranked stocks, more shorted than 70%

7.21%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
−0.55
5 reports (~10 weeks)
+2.21
days to cover
3.02
Aggregate net short position time series for Mesa Laboratories, 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 Mesa Laboratories, 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
10 Aug 20265.87% 31 Jul 20266.04% 14 Aug 2026+0.17
27 May 20264.20% 15 May 20265.06% 29 May 2026+0.86
3 Feb 20264.04% 30 Jan 20263.83% 13 Feb 2026−0.21
6 Nov 20256.60% 31 Oct 20255.91% 14 Nov 2025−0.69
5 Aug 20255.66% 31 Jul 20257.25% 15 Aug 2025+1.59
28 May 20253.41% 15 May 20253.37% 30 May 2025−0.04
4 Feb 20253.41% 31 Jan 20253.53% 14 Feb 2025+0.12
7 Nov 20242.77% 31 Oct 20242.26% 15 Nov 2024−0.51

Fails to deliver

The SEC's fails-to-deliver figure for MLAB: 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
5,200
3 Sep 2026
Highest in window
18,900
24 Sep 2025
Days with a balance
46
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Mesa Laboratories, 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 19K shares.

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Sector: Technology

History

Full reported short interest history
Settlement dateShort %Change
15 Sep 20267.21%−0.55
31 Aug 20267.76%+1.72
14 Aug 20266.04%+0.17
31 Jul 20265.87%+0.91
15 Jul 20264.96%−0.04
30 Jun 20265.00%+0.67
15 Jun 20264.33%−0.73
29 May 20265.06%+0.86
15 May 20264.20%+0.61
30 Apr 20263.59%0.00
15 Apr 20263.59%−0.41
31 Mar 20264.00%−0.06
13 Mar 20264.06%+0.01
27 Feb 20264.05%+0.22
13 Feb 20263.83%−0.21
30 Jan 20264.04%−0.43
15 Jan 20264.47%−0.61
31 Dec 20255.08%−0.05
15 Dec 20255.13%+0.05
28 Nov 20255.08%−0.83
14 Nov 20255.91%−0.69
31 Oct 20256.60%+0.35
15 Oct 20256.25%+0.20
30 Sep 20256.05%−1.55
15 Sep 20257.60%+0.34
29 Aug 20257.26%+0.01
15 Aug 20257.25%+1.59
31 Jul 20255.66%+1.00
15 Jul 20254.66%+0.64
30 Jun 20254.02%+0.63
13 Jun 20253.39%+0.02
30 May 20253.37%−0.04
15 May 20253.41%−0.29
30 Apr 20253.70%−0.43
15 Apr 20254.13%+0.69
31 Mar 20253.44%−0.03
14 Mar 20253.47%−0.19
28 Feb 20253.66%+0.13
14 Feb 20253.53%+0.12
31 Jan 20253.41%−0.09
15 Jan 20253.50%−0.07
31 Dec 20243.57%+0.71
13 Dec 20242.86%+0.13
29 Nov 20242.73%+0.47
15 Nov 20242.26%−0.51
31 Oct 20242.77%−0.35
15 Oct 20243.12%+0.33
30 Sep 20242.79%−0.21
13 Sep 20243.00%−1.08
30 Aug 20244.08%+0.58
15 Aug 20243.50%+0.16
31 Jul 20243.34%−0.14
15 Jul 20243.48%−0.24
28 Jun 20243.72%+0.17
14 Jun 20243.55%−0.04
31 May 20243.59%+0.28
15 May 20243.31%+0.53
30 Apr 20242.78%−0.11
15 Apr 20242.89%−0.65
28 Mar 20243.54%−0.10
15 Mar 20243.64%−0.76
29 Feb 20244.40%+0.17
15 Feb 20244.23%+0.09
31 Jan 20244.14%+0.14
12 Jan 20244.00%−0.21
29 Dec 20234.21%−0.06
15 Dec 20234.27%−1.19
30 Nov 20235.46%+0.01
15 Nov 20235.45%−0.04
31 Oct 20235.49%+0.28
13 Oct 20235.21%−0.93
29 Sep 20236.14%−0.47
15 Sep 20236.61%−0.12
31 Aug 20236.73%+0.33
15 Aug 20236.40%−0.05
31 Jul 20236.45%−0.22
14 Jul 20236.67%−0.63
30 Jun 20237.30%−0.38
15 Jun 20237.68%−0.39
31 May 20238.07%−0.28
15 May 20238.35%−0.37
28 Apr 20238.72%+0.32
14 Apr 20238.40%+0.20
31 Mar 20238.20%−0.26
15 Mar 20238.46%−0.33
28 Feb 20238.79%+0.61
15 Feb 20238.18%+0.21
31 Jan 20237.97%−0.18
13 Jan 20238.15%+0.71
30 Dec 20227.44%−0.30
15 Dec 20227.74%+0.48
30 Nov 20227.26%+0.25
15 Nov 20227.01%+1.05
31 Oct 20225.96%+0.41
14 Oct 20225.55%+0.03
30 Sep 20225.52%−0.85
15 Sep 20226.37%−0.71
31 Aug 20227.08%−0.55
15 Aug 20227.63%−0.96
29 Jul 20228.59%−0.05
15 Jul 20228.64%+0.21
30 Jun 20228.43%−0.09
15 Jun 20228.52%+1.57
31 May 20226.95%−0.03
13 May 20226.98%−0.07
29 Apr 20227.05%+0.15
14 Apr 20226.90%+0.45
31 Mar 20226.45%+0.33
15 Mar 20226.12%+0.35
28 Feb 20225.77%+0.05
15 Feb 20225.72%+0.12
31 Jan 20225.60%−0.14
14 Jan 20225.74%+0.06
31 Dec 20215.68%+0.12
15 Dec 20215.56%+0.05
30 Nov 20215.51%+1.86
15 Nov 20213.65%−0.09
29 Oct 20213.74%+0.29
15 Oct 20213.45%+0.13
30 Sep 20213.32%−0.16
15 Sep 20213.48%+0.26
31 Aug 20213.22%0.00
13 Aug 20213.22%+0.27
30 Jul 20212.95%−0.44
15 Jul 20213.39%−0.27
30 Jun 20213.66%−0.29
15 Jun 20213.95%−0.35
28 May 20214.30%+0.15
14 May 20214.15%+0.23
30 Apr 20213.92%−0.31
15 Apr 20214.23%−1.26
31 Mar 20215.49%−0.18
15 Mar 20215.67%−0.23
26 Feb 20215.90%+0.06
12 Feb 20215.84%−0.33
29 Jan 20216.17%−0.14
15 Jan 20216.31%+0.10
31 Dec 20206.21%−0.02
15 Dec 20206.23%−0.59
30 Nov 20206.82%+0.03
13 Nov 20206.79%+0.05
30 Oct 20206.74%−0.24
15 Oct 20206.98%−0.11
30 Sep 20207.09%+0.25
15 Sep 20206.84%−0.23
31 Aug 20207.07%+0.24
14 Aug 20206.83%−0.14
31 Jul 20206.97%−1.37
15 Jul 20208.34%−0.45
30 Jun 20208.79%−1.27
15 Jun 202010.06%−2.06
29 May 202012.12%+0.55
15 May 202011.57%−0.29
30 Apr 202011.86%+0.01
15 Apr 202011.85%−0.73
31 Mar 202012.58%−1.21
13 Mar 202013.79%−0.34
28 Feb 202014.13%+0.60
14 Feb 202013.53%+1.22
31 Jan 202012.31%−0.05
15 Jan 202012.36%−0.28
31 Dec 201912.64%−0.18
13 Dec 201912.82%−0.92
29 Nov 201913.74%+0.22
15 Nov 201913.52%−0.19
31 Oct 201913.71%−1.21
15 Oct 201914.92%−0.58
30 Sep 201915.50%−0.07
13 Sep 201915.57%−0.30
30 Aug 201915.87%−0.38
15 Aug 201916.25%+0.79
31 Jul 201915.46%−0.18
15 Jul 201915.64%+3.72
28 Jun 201911.92%+5.54
14 Jun 20196.38%+0.90
31 May 20195.48%+0.28
15 May 20195.20%+0.09
30 Apr 20195.11%−0.08
15 Apr 20195.19%−0.20
29 Mar 20195.39%−0.19
15 Mar 20195.58%−0.38
28 Feb 20195.96%−0.05
15 Feb 20196.01%−2.09
31 Jan 20198.10%−0.13
15 Jan 20198.23%−0.42
31 Dec 20188.65%−0.89
14 Dec 20189.54%−1.67
30 Nov 201811.21%+0.30
15 Nov 201810.91%+0.98
31 Oct 20189.93%+2.12
15 Oct 20187.81%+0.84
28 Sep 20186.97%+0.75
14 Sep 20186.22%−0.11
31 Aug 20186.33%+0.03
15 Aug 20186.30%−0.58
31 Jul 20186.88%−0.85
13 Jul 20187.73%−0.26
29 Jun 20187.99%−0.03
15 Jun 20188.02%−1.25
31 May 20189.27%−0.07
15 May 20189.34%−0.34
30 Apr 20189.68%+0.35
13 Apr 20189.33%+0.51
29 Mar 20188.82%+0.09
15 Mar 20188.73%+0.04
28 Feb 20188.69%+0.10
15 Feb 20188.59%+0.35
31 Jan 20188.24%+0.33
12 Jan 20187.91%+0.03
29 Dec 20177.88%–

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

Frequently asked questions

How shorted is Mesa Laboratories, Inc. right now?
7.21% of Mesa Laboratories, Inc.'s (MLAB) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 1,131st 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 MLAB'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 MLAB's days to cover?
3.02 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.