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HowShorted

How shorted is ARROWHEAD PHARMACEUTICALS, INC.? ARWR

#1,250most shorted US stockof 3,805 ranked stocks, more shorted than 67%

6.56%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
−0.11
5 reports (~10 weeks)
+0.57
days to cover
5.15
Aggregate net short position time series for ARROWHEAD 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 ARROWHEAD 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
4 Aug 20266.84% 31 Jul 20266.52% 14 Aug 2026−0.32
7 May 20269.24% 30 Apr 20269.18% 15 May 2026−0.06
5 Feb 20267.96% 30 Jan 20267.73% 13 Feb 2026−0.23
25 Nov 20258.39% 14 Nov 20258.56% 28 Nov 2025+0.17
7 Aug 20259.37% 31 Jul 20259.39% 15 Aug 2025+0.02
12 May 202510.73% 30 Apr 20259.59% 15 May 2025−1.14
10 Feb 20258.09% 31 Jan 20257.48% 14 Feb 2025−0.61
26 Nov 20247.60% 15 Nov 20248.10% 29 Nov 2024+0.50

Fails to deliver

The SEC's fails-to-deliver figure for ARWR: 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
16,510
19 Aug 2026
Highest in window
2,803,157
29 Jun 2026
Days with a balance
61
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for ARROWHEAD 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 2.8M 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 20266.56%−0.11
31 Aug 20266.67%+0.15
14 Aug 20266.52%−0.32
31 Jul 20266.84%0.00
15 Jul 20266.84%+0.85
30 Jun 20265.99%−2.34
15 Jun 20268.33%−0.47
29 May 20268.80%−0.38
15 May 20269.18%−0.06
30 Apr 20269.24%+0.66
15 Apr 20268.58%−0.71
31 Mar 20269.29%+1.13
13 Mar 20268.16%+0.20
27 Feb 20267.96%+0.23
13 Feb 20267.73%−0.23
30 Jan 20267.96%+0.16
15 Jan 20267.80%+0.84
31 Dec 20256.96%−0.44
15 Dec 20257.40%−1.16
28 Nov 20258.56%+0.17
14 Nov 20258.39%−0.13
31 Oct 20258.52%+0.09
15 Oct 20258.43%−0.03
30 Sep 20258.46%−0.12
15 Sep 20258.58%−0.63
29 Aug 20259.21%−0.18
15 Aug 20259.39%+0.02
31 Jul 20259.37%+0.38
15 Jul 20258.99%−0.15
30 Jun 20259.14%−0.04
13 Jun 20259.18%−0.46
30 May 20259.64%+0.05
15 May 20259.59%−1.14
30 Apr 202510.73%+0.79
15 Apr 20259.94%+0.44
31 Mar 20259.50%+1.22
14 Mar 20258.28%+0.99
28 Feb 20257.29%−0.19
14 Feb 20257.48%−0.61
31 Jan 20258.09%+0.32
15 Jan 20257.77%−0.28
31 Dec 20248.05%+0.18
13 Dec 20247.87%−0.23
29 Nov 20248.10%+0.50
15 Nov 20247.60%+0.05
31 Oct 20247.55%+0.04
15 Oct 20247.51%+0.34
30 Sep 20247.17%−0.11
13 Sep 20247.28%+0.32
30 Aug 20246.96%−1.45
15 Aug 20248.41%+0.34
31 Jul 20248.07%+0.79
15 Jul 20247.28%+0.12
28 Jun 20247.16%−0.45
14 Jun 20247.61%+0.35
31 May 20247.26%−0.26
15 May 20247.52%−0.24
30 Apr 20247.76%+0.60
15 Apr 20247.16%0.00
28 Mar 20247.16%−0.27
15 Mar 20247.43%+0.30
29 Feb 20247.13%+0.05
15 Feb 20247.08%+0.85
31 Jan 20246.23%−2.04
12 Jan 20248.27%+1.30
29 Dec 20236.97%−0.25
15 Dec 20237.22%+0.11
30 Nov 20237.11%−0.24
15 Nov 20237.35%+0.66
31 Oct 20236.69%+0.04
13 Oct 20236.65%+1.06
29 Sep 20235.59%−0.10
15 Sep 20235.69%−0.22
31 Aug 20235.91%+0.26
15 Aug 20235.65%+0.45
31 Jul 20235.20%+0.37
14 Jul 20234.83%+0.42
30 Jun 20234.41%−0.26
15 Jun 20234.67%+0.05
31 May 20234.62%−0.28
15 May 20234.90%+0.37
28 Apr 20234.53%+0.02
14 Apr 20234.51%−0.06
31 Mar 20234.57%−0.51
15 Mar 20235.08%+0.81
28 Feb 20234.27%−0.11
15 Feb 20234.38%+0.06
31 Jan 20234.32%−0.03
13 Jan 20234.35%−0.12
30 Dec 20224.47%+0.46
15 Dec 20224.01%+0.27
30 Nov 20223.74%+0.22
15 Nov 20223.52%−0.16
31 Oct 20223.68%−0.04
14 Oct 20223.72%+0.07
30 Sep 20223.65%−0.37
15 Sep 20224.02%+0.07
31 Aug 20223.95%−0.18
15 Aug 20224.13%−0.43
29 Jul 20224.56%−0.10
15 Jul 20224.66%−0.36
30 Jun 20225.02%+0.31
15 Jun 20224.71%+0.48
31 May 20224.23%−0.26
13 May 20224.49%+0.70
29 Apr 20223.79%+0.31
14 Apr 20223.48%−0.26
31 Mar 20223.74%+0.09
15 Mar 20223.65%+0.46
28 Feb 20223.19%+0.25
15 Feb 20222.94%+0.21
31 Jan 20222.73%+0.06
14 Jan 20222.67%+0.11
31 Dec 20212.56%−0.46
15 Dec 20213.02%+0.29
30 Nov 20212.73%−0.17
15 Nov 20212.90%+0.12
29 Oct 20212.78%0.00
15 Oct 20212.78%−0.29
30 Sep 20213.07%+0.28
15 Sep 20212.79%−0.19
31 Aug 20212.98%+0.01
13 Aug 20212.97%−0.37
30 Jul 20213.34%+0.15
15 Jul 20213.19%−0.35
30 Jun 20213.54%−0.73
15 Jun 20214.27%−0.36
28 May 20214.63%+0.01
14 May 20214.62%+0.16
30 Apr 20214.46%−0.16
15 Apr 20214.62%−0.07
31 Mar 20214.69%−0.25
15 Mar 20214.94%−0.02
26 Feb 20214.96%+0.13
12 Feb 20214.83%−0.02
29 Jan 20214.85%−0.26
15 Jan 20215.11%−0.65
31 Dec 20205.76%−1.47
15 Dec 20207.23%−0.42
30 Nov 20207.65%−0.37
13 Nov 20208.02%−0.10
30 Oct 20208.12%−1.00
15 Oct 20209.12%+0.31
30 Sep 20208.81%−0.05
15 Sep 20208.86%−0.35
31 Aug 20209.21%−0.09
14 Aug 20209.30%−0.31
31 Jul 20209.61%−0.51
15 Jul 202010.12%+0.30
30 Jun 20209.82%+1.57
15 Jun 20208.25%+0.07
29 May 20208.18%+0.28
15 May 20207.90%+0.06
30 Apr 20207.84%+0.33
15 Apr 20207.51%−0.03
31 Mar 20207.54%−0.60
13 Mar 20208.14%−0.44
28 Feb 20208.58%−0.79
14 Feb 20209.37%−1.10
31 Jan 202010.47%−1.04
15 Jan 202011.51%−0.15
31 Dec 201911.66%−1.14
13 Dec 201912.80%−1.86
29 Nov 201914.66%−0.75
15 Nov 201915.41%−0.15
31 Oct 201915.56%+0.02
15 Oct 201915.54%−1.26
30 Sep 201916.80%+0.01
13 Sep 201916.79%−0.12
30 Aug 201916.91%+0.35
15 Aug 201916.56%−2.26
31 Jul 201918.82%−0.89
15 Jul 201919.71%+0.48
28 Jun 201919.23%+0.79
14 Jun 201918.44%−1.75
31 May 201920.19%+6.12
15 May 201914.07%−0.96
30 Apr 201915.03%−0.29
15 Apr 201915.32%−1.35
29 Mar 201916.67%−1.04
15 Mar 201917.71%+0.07
28 Feb 201917.64%+0.55
15 Feb 201917.09%−0.81
31 Jan 201917.90%−1.01
15 Jan 201918.91%−1.08
31 Dec 201819.99%+1.98
14 Dec 201818.01%−1.54
30 Nov 201819.55%+0.84
15 Nov 201818.71%+0.35
31 Oct 201818.36%−1.11
15 Oct 201819.47%+1.99
28 Sep 201817.48%+1.03
14 Sep 201816.45%−0.02
31 Aug 201816.47%+0.75
15 Aug 201815.72%+0.19
31 Jul 201815.53%+1.45
13 Jul 201814.08%+0.92
29 Jun 201813.16%+4.63
15 Jun 20188.53%+1.25
31 May 20187.28%+0.05
15 May 20187.23%−1.85
30 Apr 20189.08%+0.26
13 Apr 20188.82%+1.10
29 Mar 20187.72%+1.65
15 Mar 20186.07%+0.72
28 Feb 20185.35%−0.04
15 Feb 20185.39%+0.36
31 Jan 20185.03%−0.96
12 Jan 20185.99%+2.03
29 Dec 20173.96%–

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

Frequently asked questions

How shorted is ARROWHEAD PHARMACEUTICALS, INC. right now?
6.56% of ARROWHEAD PHARMACEUTICALS, INC.'s (ARWR) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 1,250th 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 ARWR'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 ARWR's days to cover?
5.15 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.