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HowShorted

How shorted is BIOCRYST PHARMACEUTICALS INC? BCRX

#358most shorted US stockof 3,805 ranked stocks, more shorted than 90%

13.65%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
+0.32
5 reports (~10 weeks)
−5.51
days to cover
7.29
Aggregate net short position time series for BIOCRYST 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 BIOCRYST 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
5 Aug 202612.84% 31 Jul 202612.89% 14 Aug 2026+0.05
6 May 202614.72% 30 Apr 202614.21% 15 May 2026−0.51
26 Feb 202619.15% 13 Feb 202619.20% 27 Feb 2026+0.05
12 Jan 202618.55% 31 Dec 202520.52% 15 Jan 2026+1.97
3 Nov 202515.42% 31 Oct 202517.32% 14 Nov 2025+1.90
14 Oct 202513.13% 30 Sep 202514.66% 15 Oct 2025+1.53
4 Aug 202512.33% 31 Jul 202512.90% 15 Aug 2025+0.57
5 May 20258.74% 30 Apr 202510.03% 15 May 2025+1.29

Fails to deliver

The SEC's fails-to-deliver figure for BCRX: 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
1,475
10 Sep 2026
Highest in window
248,403
31 Mar 2026
Days with a balance
60
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for BIOCRYST 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 248K shares.

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Sector: Healthcare · By year: 2018 · 2019 · 2020 · 2021 · 2022 · 2023 · 2024 · 2025 · 2026

History

Full reported short interest history
Settlement dateShort %Change
15 Sep 202613.65%+0.32
31 Aug 202613.33%+0.44
14 Aug 202612.89%+0.05
31 Jul 202612.84%+0.56
15 Jul 202612.28%−6.88
30 Jun 202619.16%+3.17
15 Jun 202615.99%+1.57
29 May 202614.42%+0.21
15 May 202614.21%−0.51
30 Apr 202614.72%−3.58
15 Apr 202618.30%+1.58
31 Mar 202616.72%−1.08
13 Mar 202617.80%−1.40
27 Feb 202619.20%+0.05
13 Feb 202619.15%+0.41
30 Jan 202618.74%−1.78
15 Jan 202620.52%+1.97
31 Dec 202518.55%+1.45
15 Dec 202517.10%−0.66
28 Nov 202517.76%+0.44
14 Nov 202517.32%+1.90
31 Oct 202515.42%+0.76
15 Oct 202514.66%+1.53
30 Sep 202513.13%−0.36
15 Sep 202513.49%+0.40
29 Aug 202513.09%+0.19
15 Aug 202512.90%+0.57
31 Jul 202512.33%−0.47
15 Jul 202512.80%−0.21
30 Jun 202513.01%+1.98
13 Jun 202511.03%−0.45
30 May 202511.48%+1.45
15 May 202510.03%+1.29
30 Apr 20258.74%−1.13
15 Apr 20259.87%−0.14
31 Mar 202510.01%+0.46
14 Mar 20259.55%+1.82
28 Feb 20257.73%−0.32
14 Feb 20258.05%−0.30
31 Jan 20258.35%+0.14
15 Jan 20258.21%+0.62
31 Dec 20247.59%−0.76
13 Dec 20248.35%−1.00
29 Nov 20249.35%+0.42
15 Nov 20248.93%−1.13
31 Oct 202410.06%−0.83
15 Oct 202410.89%−0.34
30 Sep 202411.23%−0.53
13 Sep 202411.76%+0.13
30 Aug 202411.63%−0.36
15 Aug 202411.99%+0.20
31 Jul 202411.79%+1.22
15 Jul 202410.57%+1.91
28 Jun 20248.66%−5.72
14 Jun 202414.38%−3.15
31 May 202417.53%+0.88
15 May 202416.65%+0.35
30 Apr 202416.30%−0.49
15 Apr 202416.79%+1.04
28 Mar 202415.75%+0.84
15 Mar 202414.91%+0.70
29 Feb 202414.21%−0.15
15 Feb 202414.36%+0.18
31 Jan 202414.18%+0.48
12 Jan 202413.70%−0.99
29 Dec 202314.69%+0.15
15 Dec 202314.54%+0.20
30 Nov 202314.34%−0.05
15 Nov 202314.39%−0.32
31 Oct 202314.71%−8.61
13 Oct 202323.32%+0.95
29 Sep 202322.37%−0.06
15 Sep 202322.43%+0.63
31 Aug 202321.80%+0.66
15 Aug 202321.14%+0.56
31 Jul 202320.58%+0.61
14 Jul 202319.97%+0.18
30 Jun 202319.79%+1.01
15 Jun 202318.78%−0.05
31 May 202318.83%+1.73
15 May 202317.10%+0.58
28 Apr 202316.52%+0.41
14 Apr 202316.11%−0.46
31 Mar 202316.57%+0.22
15 Mar 202316.35%+0.71
28 Feb 202315.64%+1.32
15 Feb 202314.32%+0.16
31 Jan 202314.16%+0.16
13 Jan 202314.00%−0.61
30 Dec 202214.61%−0.24
15 Dec 202214.85%+0.04
30 Nov 202214.81%−0.14
15 Nov 202214.95%+0.13
31 Oct 202214.82%−0.39
14 Oct 202215.21%+0.08
30 Sep 202215.13%−0.37
15 Sep 202215.50%+0.49
31 Aug 202215.01%+0.30
15 Aug 202214.71%−1.25
29 Jul 202215.96%−0.99
15 Jul 202216.95%+0.09
30 Jun 202216.86%+0.86
15 Jun 202216.00%+0.08
31 May 202215.92%−0.06
13 May 202215.98%−0.56
29 Apr 202216.54%+1.08
14 Apr 202215.46%+1.61
31 Mar 202213.85%−0.79
15 Mar 202214.64%+0.29
28 Feb 202214.35%+0.37
15 Feb 202213.98%+0.43
31 Jan 202213.55%−0.60
14 Jan 202214.15%−0.34
31 Dec 202114.49%+0.85
15 Dec 202113.64%+0.20
30 Nov 202113.44%+0.91
15 Nov 202112.53%+1.18
29 Oct 202111.35%+0.75
15 Oct 202110.60%+0.24
30 Sep 202110.36%−0.25
15 Sep 202110.61%−0.17
31 Aug 202110.78%−0.70
13 Aug 202111.48%+1.22
30 Jul 202110.26%−0.08
15 Jul 202110.34%−0.44
30 Jun 202110.78%−0.21
15 Jun 202110.99%−0.27
28 May 202111.26%−1.19
14 May 202112.45%−0.46
30 Apr 202112.91%−1.19
15 Apr 202114.10%+0.92
31 Mar 202113.18%−1.88
15 Mar 202115.06%−1.26
26 Feb 202116.32%+0.03
12 Feb 202116.29%−1.57
29 Jan 202117.86%+0.33
15 Jan 202117.53%0.00
31 Dec 202017.53%−3.45
15 Dec 202020.98%−0.21
30 Nov 202021.19%−0.37
13 Nov 202021.56%−1.84
30 Oct 202023.40%+1.82
15 Oct 202021.58%+0.97
30 Sep 202020.61%+0.99
15 Sep 202019.62%+0.62
31 Aug 202019.00%−2.53
14 Aug 202021.53%+2.27
31 Jul 202019.26%−0.90
15 Jul 202020.16%−0.65
30 Jun 202020.81%+7.43
15 Jun 202013.38%+1.43
29 May 202011.95%+0.88
15 May 202011.07%−0.53
30 Apr 202011.60%+0.17
15 Apr 202011.43%+1.14
31 Mar 202010.29%−0.12
13 Mar 202010.41%+0.72
28 Feb 20209.69%−0.23
14 Feb 20209.92%−0.49
31 Jan 202010.41%−4.20
15 Jan 202014.61%−1.69
31 Dec 201916.30%+3.89
13 Dec 201912.41%+1.38
29 Nov 201911.03%−5.22
15 Nov 201916.25%+1.99
31 Oct 201914.26%+1.64
15 Oct 201912.62%−0.85
30 Sep 201913.47%−0.08
13 Sep 201913.55%+0.25
30 Aug 201913.30%+1.47
15 Aug 201911.83%+0.94
31 Jul 201910.89%−1.13
15 Jul 201912.02%+0.62
28 Jun 201911.40%+2.38
14 Jun 20199.02%−1.05
31 May 201910.07%−0.76
15 May 201910.83%+1.30
30 Apr 20199.53%+0.51
15 Apr 20199.02%−0.71
29 Mar 20199.73%+0.78
15 Mar 20198.95%+0.22
28 Feb 20198.73%+0.23
15 Feb 20198.50%−0.31
31 Jan 20198.81%−0.34
15 Jan 20199.15%+0.28
31 Dec 20188.87%+0.42
14 Dec 20188.45%−0.32
30 Nov 20188.77%+0.22
15 Nov 20188.55%−0.22
31 Oct 20188.77%−0.94
15 Oct 20189.71%−0.02
28 Sep 20189.73%+0.38
14 Sep 20189.35%−0.28
31 Aug 20189.63%−0.04
15 Aug 20189.67%+0.33
31 Jul 20189.34%−0.39
13 Jul 20189.73%−0.30
29 Jun 201810.03%−0.41
15 Jun 201810.44%+0.08
31 May 201810.36%−0.33
15 May 201810.69%−0.35
30 Apr 201811.04%+0.20
13 Apr 201810.84%−0.11
29 Mar 201810.95%−0.27
15 Mar 201811.22%−0.99
28 Feb 201812.21%+0.35
15 Feb 201811.86%+0.95
31 Jan 201810.91%−1.30
12 Jan 201812.21%+0.17
29 Dec 201712.04%–

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

Frequently asked questions

How shorted is BIOCRYST PHARMACEUTICALS INC right now?
13.65% of BIOCRYST PHARMACEUTICALS INC's (BCRX) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 358th 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 BCRX'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 BCRX's days to cover?
7.29 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.