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HowShorted

How shorted is CYTOKINETICS INC? CYTK

#445most shorted US stockof 3,805 ranked stocks, more shorted than 88%

12.57%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
+0.02
5 reports (~10 weeks)
−1.55
days to cover
10.55
Aggregate net short position time series for CYTOKINETICS 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 CYTOKINETICS 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
6 Aug 202612.30% 31 Jul 202611.74% 14 Aug 2026−0.56
5 May 202613.00% 30 Apr 202613.23% 15 May 2026+0.23
24 Feb 202612.09% 13 Feb 202612.57% 27 Feb 2026+0.48
5 Nov 202511.52% 31 Oct 202511.76% 14 Nov 2025+0.24
7 Aug 202513.11% 31 Jul 202512.81% 15 Aug 2025−0.30
6 May 202512.23% 30 Apr 202513.18% 15 May 2025+0.95
27 Feb 202512.77% 14 Feb 202511.88% 28 Feb 2025−0.89
8 Aug 202417.31% 31 Jul 202415.84% 15 Aug 2024−1.47

Fails to deliver

The SEC's fails-to-deliver figure for CYTK: 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.

Latest balance
98,000
14 Sep 2026
Highest in window
134,837
1 Oct 2025
Days with a balance
79
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for CYTOKINETICS 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 135K shares.

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Sector: Healthcare

History

Full reported short interest history
Settlement dateShort %Change
15 Sep 202612.57%+0.02
31 Aug 202612.55%+0.81
14 Aug 202611.74%−0.56
31 Jul 202612.30%−1.40
15 Jul 202613.70%−0.42
30 Jun 202614.12%+2.25
15 Jun 202611.87%−0.59
29 May 202612.46%−0.77
15 May 202613.23%+0.23
30 Apr 202613.00%+0.83
15 Apr 202612.17%−0.79
31 Mar 202612.96%+0.15
13 Mar 202612.81%+0.24
27 Feb 202612.57%+0.48
13 Feb 202612.09%+1.21
30 Jan 202610.88%−0.07
15 Jan 202610.95%−0.37
31 Dec 202511.32%+0.41
15 Dec 202510.91%+0.32
28 Nov 202510.59%−1.17
14 Nov 202511.76%+0.24
31 Oct 202511.52%−0.35
15 Oct 202511.87%+0.08
30 Sep 202511.79%−0.12
15 Sep 202511.91%+0.35
29 Aug 202511.56%−1.25
15 Aug 202512.81%−0.30
31 Jul 202513.11%−0.34
15 Jul 202513.45%+0.77
30 Jun 202512.68%+0.85
13 Jun 202511.83%−0.41
30 May 202512.24%−0.94
15 May 202513.18%+0.95
30 Apr 202512.23%+0.45
15 Apr 202511.78%−0.32
31 Mar 202512.10%+0.09
14 Mar 202512.01%+0.13
28 Feb 202511.88%−0.89
14 Feb 202512.77%+1.20
31 Jan 202511.57%−0.32
15 Jan 202511.89%+0.28
31 Dec 202411.61%−0.02
13 Dec 202411.63%−0.26
29 Nov 202411.89%−0.47
15 Nov 202412.36%−0.97
31 Oct 202413.33%+0.12
15 Oct 202413.21%−1.51
30 Sep 202414.72%−0.45
13 Sep 202415.17%−0.30
30 Aug 202415.47%−0.37
15 Aug 202415.84%−1.47
31 Jul 202417.31%+0.35
15 Jul 202416.96%+0.09
28 Jun 202416.87%+1.30
14 Jun 202415.57%−0.38
31 May 202415.95%+2.17
15 May 202413.78%+0.51
30 Apr 202413.27%−0.36
15 Apr 202413.63%+0.79
28 Mar 202412.84%−1.53
15 Mar 202414.37%+0.26
29 Feb 202414.11%+0.01
15 Feb 202414.10%+0.25
31 Jan 202413.85%−0.17
12 Jan 202414.02%−1.36
29 Dec 202315.38%+0.43
15 Dec 202314.95%+1.24
30 Nov 202313.71%−0.25
15 Nov 202313.96%−0.76
31 Oct 202314.72%+0.40
13 Oct 202314.32%+0.72
29 Sep 202313.60%+0.52
15 Sep 202313.08%+0.99
31 Aug 202312.09%+1.57
15 Aug 202310.52%−0.03
31 Jul 202310.55%−0.01
14 Jul 202310.56%+0.15
30 Jun 202310.41%+0.77
15 Jun 20239.64%−0.25
31 May 20239.89%+0.02
15 May 20239.87%−0.45
28 Apr 202310.32%+0.01
14 Apr 202310.31%−0.64
31 Mar 202310.95%+0.02
15 Mar 202310.93%+0.89
28 Feb 202310.04%+0.35
15 Feb 20239.69%−0.86
31 Jan 202310.55%−0.20
13 Jan 202310.75%+0.14
30 Dec 202210.61%+0.80
15 Dec 20229.81%−1.13
30 Nov 202210.94%−0.62
15 Nov 202211.56%−0.48
31 Oct 202212.04%−1.18
14 Oct 202213.22%+0.35
30 Sep 202212.87%+0.47
15 Sep 202212.40%−0.37
31 Aug 202212.77%−0.76
15 Aug 202213.53%−0.15
29 Jul 202213.68%−0.11
15 Jul 202213.79%+3.79
30 Jun 202210.00%+0.04
15 Jun 20229.96%−0.20
31 May 202210.16%−0.27
13 May 202210.43%+0.88
29 Apr 20229.55%+0.09
14 Apr 20229.46%+0.51
31 Mar 20228.95%+0.33
15 Mar 20228.62%−1.30
28 Feb 20229.92%+0.12
15 Feb 20229.80%+0.40
31 Jan 20229.40%−0.14
14 Jan 20229.54%+0.07
31 Dec 20219.47%−0.96
15 Dec 202110.43%+0.10
30 Nov 202110.33%−0.62
15 Nov 202110.95%−1.26
29 Oct 202112.21%+0.60
15 Oct 202111.61%−0.96
30 Sep 202112.57%−0.23
15 Sep 202112.80%−0.73
31 Aug 202113.53%−0.14
13 Aug 202113.67%−2.95
30 Jul 202116.62%+4.07
15 Jul 202112.55%+1.16
30 Jun 202111.39%−0.65
15 Jun 202112.04%−0.62
28 May 202112.66%−1.34
14 May 202114.00%+0.74
30 Apr 202113.26%+0.33
15 Apr 202112.93%+0.24
31 Mar 202112.69%−1.06
15 Mar 202113.75%+0.72
26 Feb 202113.03%+0.03
12 Feb 202113.00%−0.50
29 Jan 202113.50%−0.48
15 Jan 202113.98%+0.83
31 Dec 202013.15%+1.47
15 Dec 202011.68%−0.98
30 Nov 202012.66%+0.23
13 Nov 202012.43%−0.91
30 Oct 202013.34%+0.44
15 Oct 202012.90%+0.45
30 Sep 202012.45%+2.27
15 Sep 202010.18%−0.41
31 Aug 202010.59%+0.37
14 Aug 202010.22%−2.06
31 Jul 202012.28%−1.24
15 Jul 202013.52%−0.23
30 Jun 202013.75%+0.76
15 Jun 202012.99%−0.87
29 May 202013.86%+0.49
15 May 202013.37%+0.25
30 Apr 202013.12%−1.24
15 Apr 202014.36%+1.14
31 Mar 202013.22%+0.05
13 Mar 202013.17%−0.95
28 Feb 202014.12%−1.09
14 Feb 202015.21%+0.33
31 Jan 202014.88%+0.54
15 Jan 202014.34%−1.56
31 Dec 201915.90%+0.99
13 Dec 201914.91%+0.81
29 Nov 201914.10%+2.08
15 Nov 201912.02%+5.65
31 Oct 20196.37%−0.25
15 Oct 20196.62%+0.02
30 Sep 20196.60%+0.24
13 Sep 20196.36%−0.21
30 Aug 20196.57%−0.22
15 Aug 20196.79%+0.12
31 Jul 20196.67%−0.59
15 Jul 20197.26%+0.13
28 Jun 20197.13%+0.24
14 Jun 20196.89%−0.27
31 May 20197.16%−0.66
15 May 20197.82%+0.54
30 Apr 20197.28%+0.97
15 Apr 20196.31%+0.79
29 Mar 20195.52%−0.20
15 Mar 20195.72%+1.01
28 Feb 20194.71%−0.16
15 Feb 20194.87%+0.16
31 Jan 20194.71%−0.09
15 Jan 20194.80%+0.06
31 Dec 20184.74%−0.52
14 Dec 20185.26%−0.03
30 Nov 20185.29%+0.29
15 Nov 20185.00%+0.20
31 Oct 20184.80%−0.22
15 Oct 20185.02%−1.40
28 Sep 20186.42%−0.10
14 Sep 20186.52%+0.48
31 Aug 20186.04%+0.59
15 Aug 20185.45%+0.09
31 Jul 20185.36%+0.20
13 Jul 20185.16%−0.23
29 Jun 20185.39%−0.13
15 Jun 20185.52%+0.37
31 May 20185.15%+0.03
15 May 20185.12%−0.33
30 Apr 20185.45%−0.13
13 Apr 20185.58%−0.05
29 Mar 20185.63%−0.45
15 Mar 20186.08%−0.18
28 Feb 20186.26%−0.13
15 Feb 20186.39%−0.85
31 Jan 20187.24%−0.64
12 Jan 20187.88%+0.85
29 Dec 20177.03%–

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

Frequently asked questions

How shorted is CYTOKINETICS INC right now?
12.57% of CYTOKINETICS INC's (CYTK) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 445th 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 CYTK'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 CYTK's days to cover?
10.55 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.