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HowShorted

How shorted is NEUROCRINE BIOSCIENCES INC? NBIX

#1,724most shorted US stockof 3,805 ranked stocks, more shorted than 54%

4.88%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
−0.09
5 reports (~10 weeks)
−0.62
days to cover
5.37
Aggregate net short position time series for NEUROCRINE 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 NEUROCRINE 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
30 Jul 20265.31% 15 Jul 20264.32% 31 Jul 2026−0.99
5 May 20265.96% 30 Apr 20265.13% 15 May 2026−0.83
11 Feb 20263.35% 30 Jan 20263.15% 13 Feb 2026−0.20
28 Oct 20254.40% 15 Oct 20254.13% 31 Oct 2025−0.27
30 Jul 20253.27% 15 Jul 20252.88% 31 Jul 2025−0.39
5 May 20254.53% 30 Apr 20254.07% 15 May 2025−0.46
6 Feb 20252.37% 31 Jan 20253.05% 14 Feb 2025+0.68
30 Oct 20242.59% 15 Oct 20242.45% 31 Oct 2024−0.14

Fails to deliver

The SEC's fails-to-deliver figure for NBIX: 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
1,221
11 Sep 2026
Highest in window
201,605
25 Jun 2026
Days with a balance
29
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for NEUROCRINE 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 202K shares.

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Sector: Healthcare

History

Full reported short interest history
Settlement dateShort %Change
15 Sep 20264.88%−0.09
31 Aug 20264.97%+0.49
14 Aug 20264.48%+0.16
31 Jul 20264.32%−0.99
15 Jul 20265.31%−0.19
30 Jun 20265.50%−0.16
15 Jun 20265.66%+0.16
29 May 20265.50%+0.37
15 May 20265.13%−0.83
30 Apr 20265.96%+0.34
15 Apr 20265.62%+1.08
31 Mar 20264.54%+0.70
13 Mar 20263.84%+0.47
27 Feb 20263.37%+0.22
13 Feb 20263.15%−0.20
30 Jan 20263.35%−0.16
15 Jan 20263.51%−0.57
31 Dec 20254.08%+0.13
15 Dec 20253.95%−0.05
28 Nov 20254.00%+0.63
14 Nov 20253.37%−0.76
31 Oct 20254.13%−0.27
15 Oct 20254.40%+0.10
30 Sep 20254.30%+0.15
15 Sep 20254.15%−0.02
29 Aug 20254.17%+0.15
15 Aug 20254.02%+1.14
31 Jul 20252.88%−0.39
15 Jul 20253.27%−0.30
30 Jun 20253.57%+0.04
13 Jun 20253.53%−0.58
30 May 20254.11%+0.04
15 May 20254.07%−0.46
30 Apr 20254.53%+0.15
15 Apr 20254.38%+0.58
31 Mar 20253.80%+0.50
14 Mar 20253.30%+0.07
28 Feb 20253.23%+0.18
14 Feb 20253.05%+0.68
31 Jan 20252.37%−0.79
15 Jan 20253.16%−0.15
31 Dec 20243.31%−0.04
13 Dec 20243.35%−0.51
29 Nov 20243.86%−0.33
15 Nov 20244.19%+1.74
31 Oct 20242.45%−0.14
15 Oct 20242.59%+0.16
30 Sep 20242.43%+0.22
13 Sep 20242.21%+0.10
30 Aug 20242.11%−0.15
15 Aug 20242.26%−0.39
31 Jul 20242.65%+0.04
15 Jul 20242.61%−0.19
28 Jun 20242.80%+0.58
14 Jun 20242.22%+0.11
31 May 20242.11%+0.26
15 May 20241.85%+0.03
30 Apr 20241.82%−0.21
15 Apr 20242.03%−0.41
28 Mar 20242.44%−0.06
15 Mar 20242.50%+0.31
29 Feb 20242.19%0.00
15 Feb 20242.19%+0.28
31 Jan 20241.91%−0.44
12 Jan 20242.35%+0.04
29 Dec 20232.31%−0.02
15 Dec 20232.33%+0.18
30 Nov 20232.15%−0.18
15 Nov 20232.33%+0.06
31 Oct 20232.27%+0.03
13 Oct 20232.24%+0.35
29 Sep 20231.89%−0.18
15 Sep 20232.07%0.00
31 Aug 20232.07%+0.07
15 Aug 20232.00%−0.08
31 Jul 20232.08%−0.31
14 Jul 20232.39%−0.09
30 Jun 20232.48%−0.13
15 Jun 20232.61%−0.06
31 May 20232.67%−0.19
15 May 20232.86%+0.16
28 Apr 20232.70%+0.06
14 Apr 20232.64%−0.22
31 Mar 20232.86%+0.10
15 Mar 20232.76%+0.13
28 Feb 20232.63%−0.05
15 Feb 20232.68%−0.02
31 Jan 20232.70%0.00
13 Jan 20232.70%+0.36
30 Dec 20222.34%+0.01
15 Dec 20222.33%−0.47
30 Nov 20222.80%−0.15
15 Nov 20222.95%+0.21
31 Oct 20222.74%−0.12
14 Oct 20222.86%+0.08
30 Sep 20222.78%+0.26
15 Sep 20222.52%+0.26
31 Aug 20222.26%−0.62
15 Aug 20222.88%+0.18
29 Jul 20222.70%−0.02
15 Jul 20222.72%+0.14
30 Jun 20222.58%−1.32
15 Jun 20223.90%+0.16
31 May 20223.74%−0.78
13 May 20224.52%+0.85
29 Apr 20223.67%+0.25
14 Apr 20223.42%+0.30
31 Mar 20223.12%+0.03
15 Mar 20223.09%+0.08
28 Feb 20223.01%+0.09
15 Feb 20222.92%−0.08
31 Jan 20223.00%+0.34
14 Jan 20222.66%−0.31
31 Dec 20212.97%−0.15
15 Dec 20213.12%+0.25
30 Nov 20212.87%−0.47
15 Nov 20213.34%−0.55
29 Oct 20213.89%+0.08
15 Oct 20213.81%+0.15
30 Sep 20213.66%−0.02
15 Sep 20213.68%−0.27
31 Aug 20213.95%+0.17
13 Aug 20213.78%−0.59
30 Jul 20214.37%+0.12
15 Jul 20214.25%−0.38
30 Jun 20214.63%−0.06
15 Jun 20214.69%−0.73
28 May 20215.42%−0.20
14 May 20215.62%−0.75
30 Apr 20216.37%−0.26
15 Apr 20216.63%−0.82
31 Mar 20217.45%+2.71
15 Mar 20214.74%+0.74
26 Feb 20214.00%−0.31
12 Feb 20214.31%−0.05
29 Jan 20214.36%−0.32
15 Jan 20214.68%0.00
31 Dec 20204.68%+0.07
15 Dec 20204.61%−0.40
30 Nov 20205.01%−0.16
13 Nov 20205.17%−0.32
30 Oct 20205.49%+0.10
15 Oct 20205.39%−0.12
30 Sep 20205.51%−0.57
15 Sep 20206.08%+0.21
31 Aug 20205.87%+0.20
14 Aug 20205.67%−0.38
31 Jul 20206.05%+0.66
15 Jul 20205.39%+0.20
30 Jun 20205.19%+0.21
15 Jun 20204.98%−0.11
29 May 20205.09%−0.11
15 May 20205.20%−0.29
30 Apr 20205.49%−0.17
15 Apr 20205.66%+0.15
31 Mar 20205.51%−0.05
13 Mar 20205.56%+0.21
28 Feb 20205.35%+0.64
14 Feb 20204.71%+0.10
31 Jan 20204.61%+0.13
15 Jan 20204.48%−0.12
31 Dec 20194.60%−0.42
13 Dec 20195.02%+0.31
29 Nov 20194.71%+0.49
15 Nov 20194.22%+0.46
31 Oct 20193.76%+0.12
15 Oct 20193.64%−0.21
30 Sep 20193.85%−0.32
13 Sep 20194.17%+0.01
30 Aug 20194.16%−0.01
15 Aug 20194.17%−0.27
31 Jul 20194.44%0.00
15 Jul 20194.44%−0.09
28 Jun 20194.53%−0.36
14 Jun 20194.89%−0.17
31 May 20195.06%+0.88
15 May 20194.18%+0.39
30 Apr 20193.79%−0.16
15 Apr 20193.95%−0.19
29 Mar 20194.14%−0.05
15 Mar 20194.19%+0.12
28 Feb 20194.07%−0.65
15 Feb 20194.72%−0.31
31 Jan 20195.03%−0.10
15 Jan 20195.13%+0.07
31 Dec 20185.06%+1.30
14 Dec 20183.76%−0.90
30 Nov 20184.66%−0.01
15 Nov 20184.67%−0.06
31 Oct 20184.73%−0.38
15 Oct 20185.11%+0.42
28 Sep 20184.69%−0.11
14 Sep 20184.80%−0.05
31 Aug 20184.85%−0.19
15 Aug 20185.04%−0.20
31 Jul 20185.24%−0.19
13 Jul 20185.43%−0.35
29 Jun 20185.78%−0.20
15 Jun 20185.98%−0.26
31 May 20186.24%−0.52
15 May 20186.76%−0.06
30 Apr 20186.82%−0.10
13 Apr 20186.92%+0.03
29 Mar 20186.89%−0.09
15 Mar 20186.98%0.00
28 Feb 20186.98%−0.81
15 Feb 20187.79%−0.26
31 Jan 20188.05%−0.85
12 Jan 20188.90%+0.62
29 Dec 20178.28%–

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

Frequently asked questions

How shorted is NEUROCRINE BIOSCIENCES INC right now?
4.88% of NEUROCRINE BIOSCIENCES INC's (NBIX) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 1,724th 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 NBIX'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 NBIX's days to cover?
5.37 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.