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HowShorted

How shorted is SUPERNUS PHARMACEUTICALS, INC.? SUPN

#888most shorted US stockof 3,805 ranked stocks, more shorted than 76%

8.58%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
+0.54
5 reports (~10 weeks)
−3.73
days to cover
8.65
Aggregate net short position time series for SUPERNUS PHARMACEUTICALS, 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 SUPERNUS PHARMACEUTICALS, 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 20268.29% 31 Jul 20267.14% 14 Aug 2026−1.15
22 Jul 20268.36% 15 Jul 20268.29% 31 Jul 2026−0.07
5 May 20268.13% 30 Apr 20268.15% 15 May 2026+0.02
22 Apr 20268.25% 15 Apr 20268.13% 30 Apr 2026−0.12
24 Feb 20267.01% 13 Feb 20267.12% 27 Feb 2026+0.11
12 Feb 20266.96% 30 Jan 20267.01% 13 Feb 2026+0.05
4 Nov 20258.49% 31 Oct 20259.07% 14 Nov 2025+0.58
21 Oct 20258.84% 15 Oct 20258.49% 31 Oct 2025−0.35

Fails to deliver

The SEC's fails-to-deliver figure for SUPN: 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
9,121
8 Sep 2026
Highest in window
32,408
30 Jun 2026
Days with a balance
44
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for SUPERNUS PHARMACEUTICALS, 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 32K shares.

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Sector: Healthcare

History

Full reported short interest history
Settlement dateShort %Change
15 Sep 20268.58%+0.54
31 Aug 20268.04%+0.90
14 Aug 20267.14%−1.15
31 Jul 20268.29%−0.07
15 Jul 20268.36%−3.95
30 Jun 202612.31%+1.79
15 Jun 202610.52%+1.18
29 May 20269.34%+1.19
15 May 20268.15%+0.02
30 Apr 20268.13%−0.12
15 Apr 20268.25%+0.34
31 Mar 20267.91%+0.60
13 Mar 20267.31%+0.19
27 Feb 20267.12%+0.11
13 Feb 20267.01%+0.05
30 Jan 20266.96%−0.23
15 Jan 20267.19%−0.46
31 Dec 20257.65%−0.74
15 Dec 20258.39%−0.32
28 Nov 20258.71%−0.36
14 Nov 20259.07%+0.58
31 Oct 20258.49%−0.35
15 Oct 20258.84%−0.41
30 Sep 20259.25%+0.30
15 Sep 20258.95%+0.39
29 Aug 20258.56%+0.18
15 Aug 20258.38%−0.68
31 Jul 20259.06%−0.05
15 Jul 20259.11%+0.36
30 Jun 20258.75%+1.55
13 Jun 20257.20%−0.35
30 May 20257.55%+0.09
15 May 20257.46%+0.37
30 Apr 20257.09%−0.41
15 Apr 20257.50%−0.94
31 Mar 20258.44%−0.68
14 Mar 20259.12%−1.86
28 Feb 202510.98%+0.63
14 Feb 202510.35%−0.04
31 Jan 202510.39%−0.51
15 Jan 202510.90%−0.32
31 Dec 202411.22%−0.80
13 Dec 202412.02%+0.33
29 Nov 202411.69%−0.12
15 Nov 202411.81%−0.51
31 Oct 202412.32%+0.03
15 Oct 202412.29%−0.36
30 Sep 202412.65%+0.31
13 Sep 202412.34%+0.24
30 Aug 202412.10%+0.20
15 Aug 202411.90%+0.72
31 Jul 202411.18%−0.30
15 Jul 202411.48%+0.34
28 Jun 202411.14%+0.53
14 Jun 202410.61%+1.12
31 May 20249.49%+0.55
15 May 20248.94%+0.12
30 Apr 20248.82%+0.25
15 Apr 20248.57%−0.26
28 Mar 20248.83%−0.18
15 Mar 20249.01%+0.94
29 Feb 20248.07%+0.69
15 Feb 20247.38%+0.53
31 Jan 20246.85%−1.39
12 Jan 20248.24%+0.02
29 Dec 20238.22%+0.08
15 Dec 20238.14%+0.53
30 Nov 20237.61%+0.01
15 Nov 20237.60%+0.33
31 Oct 20237.27%+0.12
13 Oct 20237.15%−0.03
29 Sep 20237.18%−0.71
15 Sep 20237.89%+0.29
31 Aug 20237.60%+0.08
15 Aug 20237.52%−0.09
31 Jul 20237.61%−2.55
14 Jul 202310.16%−0.09
30 Jun 202310.25%+0.23
15 Jun 202310.02%+0.31
31 May 20239.71%+0.96
15 May 20238.75%+0.46
28 Apr 20238.29%+0.81
14 Apr 20237.48%+0.10
31 Mar 20237.38%−0.87
15 Mar 20238.25%−0.29
28 Feb 20238.54%−0.43
15 Feb 20238.97%−0.93
31 Jan 20239.90%−0.34
13 Jan 202310.24%+0.07
30 Dec 202210.17%+1.06
15 Dec 20229.11%−1.40
30 Nov 202210.51%−0.06
15 Nov 202210.57%−0.35
31 Oct 202210.92%−0.32
14 Oct 202211.24%−0.17
30 Sep 202211.41%−0.06
15 Sep 202211.47%+0.86
31 Aug 202210.61%+0.38
15 Aug 202210.23%−0.22
29 Jul 202210.45%−0.10
15 Jul 202210.55%+0.10
30 Jun 202210.45%+0.13
15 Jun 202210.32%−0.26
31 May 202210.58%+0.65
13 May 20229.93%+0.26
29 Apr 20229.67%+0.18
14 Apr 20229.49%+0.59
31 Mar 20228.90%−0.22
15 Mar 20229.12%−1.30
28 Feb 202210.42%−2.49
15 Feb 202212.91%−0.52
31 Jan 202213.43%−0.53
14 Jan 202213.96%+0.28
31 Dec 202113.68%−0.75
15 Dec 202114.43%+0.89
30 Nov 202113.54%+0.04
15 Nov 202113.50%−1.07
29 Oct 202114.57%+0.25
15 Oct 202114.32%−0.13
30 Sep 202114.45%+0.26
15 Sep 202114.19%+0.29
31 Aug 202113.90%−0.22
13 Aug 202114.12%−0.03
30 Jul 202114.15%−1.01
15 Jul 202115.16%−2.07
30 Jun 202117.23%+1.33
15 Jun 202115.90%−1.05
28 May 202116.95%+0.31
14 May 202116.64%−0.21
30 Apr 202116.85%+1.43
15 Apr 202115.42%+1.49
31 Mar 202113.93%−0.26
15 Mar 202114.19%+0.01
26 Feb 202114.18%+0.61
12 Feb 202113.57%+0.67
29 Jan 202112.90%+0.63
15 Jan 202112.27%+0.09
31 Dec 202012.18%+0.93
15 Dec 202011.25%+0.35
30 Nov 202010.90%+0.17
13 Nov 202010.73%+0.87
30 Oct 20209.86%+0.14
15 Oct 20209.72%−0.13
30 Sep 20209.85%−0.24
15 Sep 202010.09%−0.17
31 Aug 202010.26%+0.04
14 Aug 202010.22%+1.11
31 Jul 20209.11%+0.44
15 Jul 20208.67%+0.18
30 Jun 20208.49%+0.36
15 Jun 20208.13%+0.12
29 May 20208.01%+0.24
15 May 20207.77%+0.23
30 Apr 20207.54%−0.89
15 Apr 20208.43%−0.05
31 Mar 20208.48%−2.14
13 Mar 202010.62%−1.24
28 Feb 202011.86%−0.34
14 Feb 202012.20%−0.81
31 Jan 202013.01%+0.55
15 Jan 202012.46%+0.27
31 Dec 201912.19%+0.90
13 Dec 201911.29%+0.99
29 Nov 201910.30%−0.32
15 Nov 201910.62%−1.61
31 Oct 201912.23%+0.32
15 Oct 201911.91%+1.27
30 Sep 201910.64%−1.14
13 Sep 201911.78%−0.68
30 Aug 201912.46%−0.63
15 Aug 201913.09%−0.77
31 Jul 201913.86%−0.15
15 Jul 201914.01%+0.78
28 Jun 201913.23%+0.63
14 Jun 201912.60%+0.59
31 May 201912.01%−0.97
15 May 201912.98%−0.02
30 Apr 201913.00%−0.51
15 Apr 201913.51%+0.86
29 Mar 201912.65%+1.35
15 Mar 201911.30%+0.75
28 Feb 201910.55%+0.58
15 Feb 20199.97%+0.64
31 Jan 20199.33%−0.21
15 Jan 20199.54%−0.37
31 Dec 20189.91%−0.09
14 Dec 201810.00%+0.82
30 Nov 20189.18%+0.23
15 Nov 20188.95%+0.13
31 Oct 20188.82%+0.32
15 Oct 20188.50%−1.13
28 Sep 20189.63%+0.48
14 Sep 20189.15%−0.70
31 Aug 20189.85%−1.58
15 Aug 201811.43%−1.98
31 Jul 201813.41%−0.09
13 Jul 201813.50%−0.13
29 Jun 201813.63%+0.62
15 Jun 201813.01%+2.01
31 May 201811.00%+0.19
15 May 201810.81%+2.07
30 Apr 20188.74%−0.14
13 Apr 20188.88%−0.19
29 Mar 20189.07%+1.40
15 Mar 20187.67%+0.19
28 Feb 20187.48%−0.04
15 Feb 20187.52%−0.43
31 Jan 20187.95%+1.15
12 Jan 20186.80%+0.26
29 Dec 20176.54%–

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

Frequently asked questions

How shorted is SUPERNUS PHARMACEUTICALS, INC. right now?
8.58% of SUPERNUS PHARMACEUTICALS, INC.'s (SUPN) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 888th 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 SUPN'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 SUPN's days to cover?
8.65 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.