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HowShorted

How shorted is XBiotech Inc.? XBIT

#3,216most shorted US stockof 3,805 ranked stocks, more shorted than 15%

1.14%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
+0.02
5 reports (~10 weeks)
+0.24
days to cover
4.97
Aggregate net short position time series for XBiotech 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 XBiotech Inc. days to cover

Fails to deliver

The SEC's fails-to-deliver figure for XBIT: 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
2,497
2 Sep 2026
Highest in window
144,583
7 Nov 2025
Days with a balance
32
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for XBiotech 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 145K shares.

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Sector: Healthcare

History

Full reported short interest history
Settlement dateShort %Change
15 Sep 20261.14%+0.02
31 Aug 20261.12%+0.03
14 Aug 20261.09%+0.02
31 Jul 20261.07%+0.15
15 Jul 20260.92%+0.02
30 Jun 20260.90%+0.19
15 Jun 20260.71%+0.12
29 May 20260.59%−0.01
15 May 20260.60%+0.03
30 Apr 20260.57%+0.08
15 Apr 20260.49%+0.02
31 Mar 20260.47%+0.08
13 Mar 20260.39%+0.03
27 Feb 20260.36%0.00
13 Feb 20260.36%−0.01
30 Jan 20260.37%+0.03
15 Jan 20260.34%+0.01
31 Dec 20250.33%−0.03
15 Dec 20250.36%−0.02
28 Nov 20250.38%−0.12
14 Nov 20250.50%+0.18
31 Oct 20250.32%0.00
15 Oct 20250.32%−0.07
30 Sep 20250.39%−0.17
15 Sep 20250.56%+0.02
29 Aug 20250.54%−0.46
15 Aug 20251.00%−0.38
31 Jul 20251.38%−0.31
15 Jul 20251.69%−0.06
30 Jun 20251.75%−1.52
13 Jun 20253.27%+0.73
30 May 20252.54%−0.10
15 May 20252.64%−0.31
30 Apr 20252.95%+0.66
15 Apr 20252.29%−0.25
31 Mar 20252.54%−0.08
14 Mar 20252.62%−0.80
28 Feb 20253.42%+0.43
14 Feb 20252.99%+0.01
31 Jan 20252.98%+0.40
15 Jan 20252.58%+0.05
31 Dec 20242.53%−0.01
13 Dec 20242.54%−0.10
29 Nov 20242.64%−0.14
15 Nov 20242.78%0.00
31 Oct 20242.78%−0.19
15 Oct 20242.97%−0.07
30 Sep 20243.04%+0.20
13 Sep 20242.84%+0.04
30 Aug 20242.80%−0.17
15 Aug 20242.97%−0.11
31 Jul 20243.08%−0.03
15 Jul 20243.11%+1.26
28 Jun 20241.85%−0.31
14 Jun 20242.16%−0.02
31 May 20242.18%−0.02
15 May 20242.20%−0.13
30 Apr 20242.33%+0.13
15 Apr 20242.20%+0.21
28 Mar 20241.99%+0.07
15 Mar 20241.92%+0.15
29 Feb 20241.77%+0.47
15 Feb 20241.30%+0.06
31 Jan 20241.24%+0.11
12 Jan 20241.13%+0.01
29 Dec 20231.12%0.00
15 Dec 20231.12%0.00
30 Nov 20231.12%+0.09
15 Nov 20231.03%+0.06
31 Oct 20230.97%−0.01
13 Oct 20230.98%+0.07
29 Sep 20230.91%+0.07
15 Sep 20230.84%+0.36
31 Aug 20230.48%−0.07
15 Aug 20230.55%+0.05
31 Jul 20230.50%−0.03
14 Jul 20230.53%0.00
30 Jun 20230.53%+0.02
15 Jun 20230.51%+0.22
31 May 20230.29%+0.01
15 May 20230.28%+0.06
28 Apr 20230.22%−0.02
14 Apr 20230.24%−0.02
31 Mar 20230.26%+0.03
15 Mar 20230.23%−0.04
28 Feb 20230.27%+0.05
15 Feb 20230.22%−0.02
31 Jan 20230.24%−0.02
13 Jan 20230.26%0.00
30 Dec 20220.26%−0.08
15 Dec 20220.34%−0.12
30 Nov 20220.46%+0.07
15 Nov 20220.39%+0.07
31 Oct 20220.32%+0.10
14 Oct 20220.22%−0.03
30 Sep 20220.25%+0.02
15 Sep 20220.23%−0.06
31 Aug 20220.29%+0.02
15 Aug 20220.27%−1.67
15 Jun 20221.94%+0.04
31 May 20221.90%−0.13
13 May 20222.03%+0.23
29 Apr 20221.80%+0.24
14 Apr 20221.56%−0.36
31 Mar 20221.92%+0.03
15 Mar 20221.89%+0.12
28 Feb 20221.77%−0.13
15 Feb 20221.90%+0.06
31 Jan 20221.84%+0.01
14 Jan 20221.83%−0.09
31 Dec 20211.92%−0.29
15 Dec 20212.21%−0.04
30 Nov 20212.25%−0.08
15 Nov 20212.33%−0.04
29 Oct 20212.37%0.00
15 Oct 20212.37%−0.01
30 Sep 20212.38%−0.10
15 Sep 20212.48%−0.03
31 Aug 20212.51%+0.08
13 Aug 20212.43%−0.14
30 Jul 20212.57%−0.23
15 Jul 20212.80%−0.25
30 Jun 20213.05%−0.53
15 Jun 20213.58%−0.38
28 May 20213.96%−0.29
14 May 20214.25%−0.25
30 Apr 20214.50%−0.27
15 Apr 20214.77%−0.08
31 Mar 20214.85%−0.02
15 Mar 20214.87%−0.26
26 Feb 20215.13%−0.18
12 Feb 20215.31%−0.24
29 Jan 20215.55%−0.04
15 Jan 20215.59%−0.05
31 Dec 20205.64%−0.18
15 Dec 20205.82%+0.02
30 Nov 20205.80%+0.02
13 Nov 20205.78%−0.51
30 Oct 20206.29%−0.06
15 Oct 20206.35%+0.25
30 Sep 20206.10%−0.80
15 Sep 20206.90%−0.15
31 Aug 20207.05%+0.64
14 Aug 20206.41%−0.43
31 Jul 20206.84%−0.65
15 Jul 20207.49%−0.16
30 Jun 20207.65%+0.79
15 Jun 20206.86%−0.50
29 May 20207.36%+0.34
15 May 20207.02%−0.66
30 Apr 20207.68%−0.64
15 Apr 20208.32%+0.81
31 Mar 20207.51%+0.37
13 Mar 20207.14%−1.92
28 Feb 20209.06%+0.53
14 Feb 20208.53%−3.20
31 Jan 202011.73%+2.57
15 Jan 20209.16%+0.43
31 Dec 20198.73%+0.84
13 Dec 20197.89%−2.51
29 Nov 201910.40%+0.73
15 Nov 20199.67%+0.36
31 Oct 20199.31%+0.26
15 Oct 20199.05%+0.63
30 Sep 20198.42%+0.43
13 Sep 20197.99%0.00
30 Aug 20197.99%+0.45
15 Aug 20197.54%+0.75
31 Jul 20196.79%−1.07
15 Jul 20197.86%+1.97
28 Jun 20195.89%+1.09
14 Jun 20194.80%+0.31
31 May 20194.49%+0.24
15 May 20194.25%+0.05
30 Apr 20194.20%+0.12
15 Apr 20194.08%+0.12
29 Mar 20193.96%+0.55
15 Mar 20193.41%+0.08
28 Feb 20193.33%−0.17
15 Feb 20193.50%+0.43
31 Jan 20193.07%+0.32
15 Jan 20192.75%+0.30
31 Dec 20182.45%−1.27
14 Dec 20183.72%−0.64
30 Nov 20184.36%−0.25
15 Nov 20184.61%−0.25
31 Oct 20184.86%−0.70
15 Oct 20185.56%−0.76
28 Sep 20186.32%−0.52
14 Sep 20186.84%−0.22
31 Aug 20187.06%−0.31
15 Aug 20187.37%−1.01
31 Jul 20188.38%−0.05
13 Jul 20188.43%−0.29
29 Jun 20188.72%−3.99
15 Jun 201812.71%+0.10
31 May 201812.61%+0.17
15 May 201812.44%−0.12
30 Apr 201812.56%−0.19
13 Apr 201812.75%−0.48
29 Mar 201813.23%−0.46
15 Mar 201813.69%−0.61
28 Feb 201814.30%−0.28
15 Feb 201814.58%+0.15
31 Jan 201814.43%−0.88
12 Jan 201815.31%+0.11
29 Dec 201715.20%–

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

Frequently asked questions

How shorted is XBiotech Inc. right now?
1.14% of XBiotech Inc.'s (XBIT) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 3,216th 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 XBIT'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 XBIT's days to cover?
4.97 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.