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HowShorted

How shorted is Pulse Biosciences, Inc? PLSE

#1,891most shorted US stockof 3,805 ranked stocks, more shorted than 50%

4.40%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
+0.02
5 reports (~10 weeks)
+0.21
days to cover
3.89
Aggregate net short position time series for Pulse Biosciences, 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 Pulse Biosciences, 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 20264.18% 31 Jul 20263.88% 14 Aug 2026−0.30
4 May 20264.29% 30 Apr 20264.72% 15 May 2026+0.43
19 Feb 20263.72% 13 Feb 20263.72% 27 Feb 20260.00
5 Nov 20253.50% 31 Oct 20253.57% 14 Nov 2025+0.07
12 Aug 20253.64% 31 Jul 20253.79% 15 Aug 2025+0.15
8 May 20253.54% 30 Apr 20253.65% 15 May 2025+0.11
28 Mar 20253.76% 14 Mar 20253.66% 31 Mar 2025−0.10
30 Oct 20244.49% 15 Oct 20244.12% 31 Oct 2024−0.37

Fails to deliver

The SEC's fails-to-deliver figure for PLSE: 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
17
14 Sep 2026
Highest in window
127,247
4 Sep 2026
Days with a balance
124
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Pulse Biosciences, 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 127K shares.

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Sector: Healthcare

History

Full reported short interest history
Settlement dateShort %Change
15 Sep 20264.40%+0.02
31 Aug 20264.38%+0.50
14 Aug 20263.88%−0.30
31 Jul 20264.18%−0.06
15 Jul 20264.24%+0.05
30 Jun 20264.19%+0.06
15 Jun 20264.13%−0.39
29 May 20264.52%−0.20
15 May 20264.72%+0.43
30 Apr 20264.29%+0.03
15 Apr 20264.26%−0.01
31 Mar 20264.27%+0.41
13 Mar 20263.86%+0.14
27 Feb 20263.72%0.00
13 Feb 20263.72%−0.15
30 Jan 20263.87%+0.07
15 Jan 20263.80%−0.14
31 Dec 20253.94%+0.11
15 Dec 20253.83%+0.19
28 Nov 20253.64%+0.07
14 Nov 20253.57%+0.07
31 Oct 20253.50%−0.14
15 Oct 20253.64%−0.06
30 Sep 20253.70%−0.07
15 Sep 20253.77%+0.05
29 Aug 20253.72%−0.07
15 Aug 20253.79%+0.15
31 Jul 20253.64%+0.02
15 Jul 20253.62%−0.10
30 Jun 20253.72%+0.08
13 Jun 20253.64%+0.07
30 May 20253.57%−0.08
15 May 20253.65%+0.11
30 Apr 20253.54%+0.04
15 Apr 20253.50%−0.16
31 Mar 20253.66%−0.10
14 Mar 20253.76%+0.09
28 Feb 20253.67%+0.09
14 Feb 20253.58%+0.14
31 Jan 20253.44%−0.02
15 Jan 20253.46%+0.05
31 Dec 20243.41%−0.11
13 Dec 20243.52%+0.07
29 Nov 20243.45%+0.06
15 Nov 20243.39%−0.73
31 Oct 20244.12%−0.37
15 Oct 20244.49%−0.03
30 Sep 20244.52%+0.04
13 Sep 20244.48%−0.08
30 Aug 20244.56%−0.24
15 Aug 20244.80%−0.47
31 Jul 20245.27%+0.20
15 Jul 20245.07%+0.54
28 Jun 20244.53%+0.12
14 Jun 20244.41%−0.74
31 May 20245.15%−0.16
15 May 20245.31%+0.20
30 Apr 20245.11%−0.15
15 Apr 20245.26%+0.50
28 Mar 20244.76%+0.22
15 Mar 20244.54%−0.13
29 Feb 20244.67%−0.05
15 Feb 20244.72%−0.07
31 Jan 20244.79%+0.30
12 Jan 20244.49%+0.22
29 Dec 20234.27%−0.38
15 Dec 20234.65%+0.30
30 Nov 20234.35%+0.11
15 Nov 20234.24%+0.33
31 Oct 20233.91%+0.14
13 Oct 20233.77%−0.11
29 Sep 20233.88%+0.19
15 Sep 20233.69%+0.26
31 Aug 20233.43%+0.32
15 Aug 20233.11%+0.02
31 Jul 20233.09%−1.68
14 Jul 20234.77%−0.20
30 Jun 20234.97%+0.74
15 Jun 20234.23%+0.13
31 May 20234.10%−0.36
15 May 20234.46%−0.30
28 Apr 20234.76%−0.27
14 Apr 20235.03%−0.20
31 Mar 20235.23%−0.37
15 Mar 20235.60%+0.22
28 Feb 20235.38%−0.33
15 Feb 20235.71%−0.16
31 Jan 20235.87%−0.13
13 Jan 20236.00%+0.25
30 Dec 20225.75%−0.32
15 Dec 20226.07%−0.43
30 Nov 20226.50%−0.08
15 Nov 20226.58%+0.47
31 Oct 20226.11%+0.08
14 Oct 20226.03%+0.53
30 Sep 20225.50%+0.33
15 Sep 20225.17%+0.06
31 Aug 20225.11%+0.13
15 Aug 20224.98%−1.16
29 Jul 20226.14%−0.24
15 Jul 20226.38%0.00
30 Jun 20226.38%−1.70
15 Jun 20228.08%−1.49
31 May 20229.57%−0.06
13 May 20229.63%+0.27
29 Apr 20229.36%+1.03
14 Apr 20228.33%−0.37
31 Mar 20228.70%+0.11
15 Mar 20228.59%+0.58
28 Feb 20228.01%+0.97
15 Feb 20227.04%+0.78
31 Jan 20226.26%+0.47
14 Jan 20225.79%+0.26
31 Dec 20215.53%+0.24
15 Dec 20215.29%+0.31
30 Nov 20214.98%+0.05
15 Nov 20214.93%+0.01
29 Oct 20214.92%+0.04
15 Oct 20214.88%−0.07
30 Sep 20214.95%−0.35
15 Sep 20215.30%−0.10
31 Aug 20215.40%+0.03
13 Aug 20215.37%−0.40
30 Jul 20215.77%+0.38
15 Jul 20215.39%+0.36
30 Jun 20215.03%−0.25
15 Jun 20215.28%+0.19
28 May 20215.09%−0.18
14 May 20215.27%+0.59
30 Apr 20214.68%−0.12
15 Apr 20214.80%−0.33
31 Mar 20215.13%+0.04
15 Mar 20215.09%+0.31
26 Feb 20214.78%+0.35
12 Feb 20214.43%−0.51
29 Jan 20214.94%−1.40
15 Jan 20216.34%−1.26
31 Dec 20207.60%−0.85
15 Dec 20208.45%−0.72
30 Nov 20209.17%−0.04
13 Nov 20209.21%−0.05
30 Oct 20209.26%+0.09
15 Oct 20209.17%−0.18
30 Sep 20209.35%−0.20
15 Sep 20209.55%−0.08
31 Aug 20209.63%−0.55
14 Aug 202010.18%−0.08
31 Jul 202010.26%−2.65
15 Jul 202012.91%−0.19
30 Jun 202013.10%−0.21
15 Jun 202013.31%+1.14
29 May 202012.17%+0.74
15 May 202011.43%−0.93
30 Apr 202012.36%−0.19
15 Apr 202012.55%−0.63
31 Mar 202013.18%+0.12
13 Mar 202013.06%+0.52
28 Feb 202012.54%+1.30
14 Feb 202011.24%+0.01
31 Jan 202011.23%−0.63
15 Jan 202011.86%+0.16
31 Dec 201911.70%+0.19
13 Dec 201911.51%−0.16
29 Nov 201911.67%+0.04
15 Nov 201911.63%+0.05
31 Oct 201911.58%−0.44
15 Oct 201912.02%–

Newest first. Scroll inside the table for earlier dates, back to 15 Oct 2019.

Frequently asked questions

How shorted is Pulse Biosciences, Inc right now?
4.40% of Pulse Biosciences, Inc's (PLSE) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 1,891st 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 PLSE'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 PLSE's days to cover?
3.89 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.