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HowShorted

How shorted is Arcus Biosciences, Inc.? RCUS

#570most shorted US stockof 3,805 ranked stocks, more shorted than 85%

10.85%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
+0.58
5 reports (~10 weeks)
+0.80
days to cover
7.81
Aggregate net short position time series for Arcus 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 Arcus 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
5 Aug 202610.30% 31 Jul 202610.88% 14 Aug 2026+0.58
5 May 20268.65% 30 Apr 20268.66% 15 May 2026+0.01
25 Feb 20268.34% 13 Feb 20268.58% 27 Feb 2026+0.24
28 Oct 20258.13% 15 Oct 20257.73% 31 Oct 2025−0.40
6 Aug 20258.47% 31 Jul 20258.55% 15 Aug 2025+0.08
6 May 20258.64% 30 Apr 20259.35% 15 May 2025+0.71
25 Feb 20257.07% 14 Feb 20257.51% 28 Feb 2025+0.44
18 Feb 20257.07% 14 Feb 20257.51% 28 Feb 2025+0.44

Fails to deliver

The SEC's fails-to-deliver figure for RCUS: 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
91
2 Sep 2026
Highest in window
640,490
11 Jun 2026
Days with a balance
47
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Arcus 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 640K shares.

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Sector: Healthcare

History

Full reported short interest history
Settlement dateShort %Change
15 Sep 202610.85%+0.58
31 Aug 202610.27%−0.61
14 Aug 202610.88%+0.58
31 Jul 202610.30%+0.31
15 Jul 20269.99%−0.06
30 Jun 202610.05%−0.50
15 Jun 202610.55%+1.24
29 May 20269.31%+0.65
15 May 20268.66%+0.01
30 Apr 20268.65%−1.61
15 Apr 202610.26%+1.11
31 Mar 20269.15%+1.18
13 Mar 20267.97%−0.61
27 Feb 20268.58%+0.24
13 Feb 20268.34%+0.75
30 Jan 20267.59%−0.66
15 Jan 20268.25%−0.64
31 Dec 20258.89%+1.64
15 Dec 20257.25%−1.16
28 Nov 20258.41%−0.75
14 Nov 20259.16%+1.43
31 Oct 20257.73%−0.40
15 Oct 20258.13%−1.16
30 Sep 20259.29%−0.95
15 Sep 202510.24%+1.00
29 Aug 20259.24%+0.69
15 Aug 20258.55%+0.08
31 Jul 20258.47%−1.03
15 Jul 20259.50%−0.86
30 Jun 202510.36%+0.47
13 Jun 20259.89%−0.96
30 May 202510.85%+1.50
15 May 20259.35%+0.71
30 Apr 20258.64%−1.90
15 Apr 202510.54%+1.31
31 Mar 20259.23%+1.13
14 Mar 20258.10%+0.59
28 Feb 20257.51%+0.44
14 Feb 20257.07%+0.10
31 Jan 20256.97%−2.04
15 Jan 20259.01%+0.54
31 Dec 20248.47%+0.40
13 Dec 20248.07%−0.71
29 Nov 20248.78%+0.51
15 Nov 20248.27%+1.00
31 Oct 20247.27%+0.34
15 Oct 20246.93%−0.30
30 Sep 20247.23%−0.32
13 Sep 20247.55%+0.18
30 Aug 20247.37%−0.25
15 Aug 20247.62%+0.34
31 Jul 20247.28%−0.02
15 Jul 20247.30%+0.53
28 Jun 20246.77%−1.93
14 Jun 20248.70%+0.54
31 May 20248.16%−0.14
15 May 20248.30%−0.23
30 Apr 20248.53%+1.00
15 Apr 20247.53%−1.55
28 Mar 20249.08%+0.29
15 Mar 20248.79%+0.33
29 Feb 20248.46%+0.18
15 Feb 20248.28%−1.07
31 Jan 20249.35%−0.21
12 Jan 20249.56%−0.15
29 Dec 20239.71%+0.66
15 Dec 20239.05%+0.26
30 Nov 20238.79%+0.75
15 Nov 20238.04%−1.25
31 Oct 20239.29%+0.05
13 Oct 20239.24%+0.35
29 Sep 20238.89%+0.13
15 Sep 20238.76%−1.09
31 Aug 20239.85%+0.23
15 Aug 20239.62%−0.29
31 Jul 20239.91%−0.70
14 Jul 202310.61%−0.19
30 Jun 202310.80%−2.38
15 Jun 202313.18%−0.82
31 May 202314.00%+2.13
15 May 202311.87%+1.08
28 Apr 202310.79%−0.36
14 Apr 202311.15%+0.54
31 Mar 202310.61%+1.40
15 Mar 20239.21%−1.10
28 Feb 202310.31%+1.32
15 Feb 20238.99%+0.06
31 Jan 20238.93%+0.10
13 Jan 20238.83%−1.29
30 Dec 202210.12%−0.26
15 Dec 202210.38%−0.06
30 Nov 202210.44%+0.75
15 Nov 20229.69%+0.43
31 Oct 20229.26%−2.21
14 Oct 202211.47%+0.14
30 Sep 202211.33%−0.35
15 Sep 202211.68%−0.05
31 Aug 202211.73%+0.35
15 Aug 202211.38%+0.52
29 Jul 202210.86%+0.45
15 Jul 202210.41%+0.44
30 Jun 20229.97%+0.43
15 Jun 20229.54%−0.27
31 May 20229.81%−1.30
13 May 202211.11%−1.96
29 Apr 202213.07%+1.17
14 Apr 202211.90%+3.87
31 Mar 20228.03%+0.42
15 Mar 20227.61%−0.46
28 Feb 20228.07%−0.10
15 Feb 20228.17%−0.48
31 Jan 20228.65%−0.83
14 Jan 20229.48%−2.47
31 Dec 202111.95%+1.86
15 Dec 202110.09%−0.54
30 Nov 202110.63%+0.12
15 Nov 202110.51%−0.02
29 Oct 202110.53%+0.37
15 Oct 202110.16%+0.21
30 Sep 20219.95%−0.49
15 Sep 202110.44%−0.30
31 Aug 202110.74%−0.09
13 Aug 202110.83%−0.09
30 Jul 202110.92%+0.79
15 Jul 202110.13%+0.59
30 Jun 20219.54%+0.40
15 Jun 20219.14%+0.02
28 May 20219.12%+0.46
14 May 20218.66%+0.89
30 Apr 20217.77%−0.25
15 Apr 20218.02%−0.58
31 Mar 20218.60%+0.29
15 Mar 20218.31%0.00
26 Feb 20218.31%−0.01
12 Feb 20218.32%−0.90
29 Jan 20219.22%−0.51
15 Jan 20219.73%+0.68
31 Dec 20209.05%−0.67
15 Dec 20209.72%−0.22
30 Nov 20209.94%−0.29
13 Nov 202010.23%−0.27
30 Oct 202010.50%−0.30
15 Oct 202010.80%+0.83
30 Sep 20209.97%+1.65
15 Sep 20208.32%+0.28
31 Aug 20208.04%+0.28
14 Aug 20207.76%+0.89
31 Jul 20206.87%+5.95
15 May 20200.92%+0.20
30 Apr 20200.72%−0.75
15 Apr 20201.47%−0.12
31 Mar 20201.59%−0.48
13 Mar 20202.07%−1.25
28 Feb 20203.32%+0.63
14 Feb 20202.69%−0.13
31 Jan 20202.82%−0.30
15 Jan 20203.12%+0.01
31 Dec 20193.11%−0.06
13 Dec 20193.17%+0.15
29 Nov 20193.02%−0.43
15 Nov 20193.45%−0.01
31 Oct 20193.46%−0.92
15 Oct 20194.38%–

Newest first. Scroll inside the table for earlier dates, back to 15 Oct 2019.

Frequently asked questions

How shorted is Arcus Biosciences, Inc. right now?
10.85% of Arcus Biosciences, Inc.'s (RCUS) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 570th 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 RCUS'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 RCUS's days to cover?
7.81 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.