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HowShorted

How shorted is F5, Inc.? FFIV

#2,757most shorted US stockof 3,805 ranked stocks, more shorted than 27%

2.38%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
−0.39
5 reports (~10 weeks)
−0.39
days to cover
2.95
Aggregate net short position time series for F5, 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 F5, 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
27 Jul 20262.30% 15 Jul 20262.50% 31 Jul 2026+0.20
28 Apr 20263.08% 15 Apr 20262.79% 30 Apr 2026−0.29
27 Jan 20265.23% 15 Jan 20264.09% 30 Jan 2026−1.14
27 Oct 20254.49% 15 Oct 20254.53% 31 Oct 2025+0.04
30 Jul 20252.92% 15 Jul 20253.03% 31 Jul 2025+0.11
28 Apr 20252.93% 15 Apr 20252.94% 30 Apr 2025+0.01
28 Jan 20252.78% 15 Jan 20253.19% 31 Jan 2025+0.41
28 Oct 20243.64% 15 Oct 20243.98% 31 Oct 2024+0.34

Fails to deliver

The SEC's fails-to-deliver figure for FFIV: 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
25 Aug 2026
Highest in window
68,256
4 Feb 2026
Days with a balance
54
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for F5, 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 68K shares.

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Sector: Technology

History

Full reported short interest history
Settlement dateShort %Change
15 Sep 20262.38%−0.39
31 Aug 20262.77%+0.58
14 Aug 20262.19%−0.31
31 Jul 20262.50%+0.20
15 Jul 20262.30%−0.47
30 Jun 20262.77%+0.32
15 Jun 20262.45%−0.30
29 May 20262.75%+0.17
15 May 20262.58%−0.21
30 Apr 20262.79%−0.29
15 Apr 20263.08%−0.35
31 Mar 20263.43%+0.11
13 Mar 20263.32%+0.08
27 Feb 20263.24%−0.46
13 Feb 20263.70%−0.39
30 Jan 20264.09%−1.14
15 Jan 20265.23%−0.38
31 Dec 20255.61%−0.53
15 Dec 20256.14%+0.53
28 Nov 20255.61%+1.11
14 Nov 20254.50%−0.03
31 Oct 20254.53%+0.04
15 Oct 20254.49%+1.27
30 Sep 20253.22%+0.12
15 Sep 20253.10%−0.25
29 Aug 20253.35%−0.10
15 Aug 20253.45%+0.42
31 Jul 20253.03%+0.11
15 Jul 20252.92%−0.30
30 Jun 20253.22%−0.05
13 Jun 20253.27%+0.12
30 May 20253.15%+0.29
15 May 20252.86%−0.08
30 Apr 20252.94%+0.01
15 Apr 20252.93%+0.67
31 Mar 20252.26%−0.33
14 Mar 20252.59%−0.06
28 Feb 20252.65%+0.04
14 Feb 20252.61%−0.58
31 Jan 20253.19%+0.41
15 Jan 20252.78%+0.12
31 Dec 20242.66%+0.13
13 Dec 20242.53%−1.14
29 Nov 20243.67%+0.10
15 Nov 20243.57%−0.41
31 Oct 20243.98%+0.34
15 Oct 20243.64%−0.17
30 Sep 20243.81%−0.11
13 Sep 20243.92%+0.48
30 Aug 20243.44%−0.30
15 Aug 20243.74%−0.53
31 Jul 20244.27%+0.06
15 Jul 20244.21%−0.36
28 Jun 20244.57%+0.47
14 Jun 20244.10%−0.98
31 May 20245.08%+0.94
15 May 20244.14%+0.84
30 Apr 20243.30%+0.11
15 Apr 20243.19%+0.29
28 Mar 20242.90%−0.20
15 Mar 20243.10%−0.03
29 Feb 20243.13%+0.33
15 Feb 20242.80%−0.05
31 Jan 20242.85%−0.28
12 Jan 20243.13%−0.32
29 Dec 20233.45%−0.35
15 Dec 20233.80%+1.18
30 Nov 20232.62%+0.42
15 Nov 20232.20%−0.13
31 Oct 20232.33%+0.02
13 Oct 20232.31%−0.01
29 Sep 20232.32%−0.15
15 Sep 20232.47%+0.23
31 Aug 20232.24%−0.31
15 Aug 20232.55%+0.02
31 Jul 20232.53%−0.39
14 Jul 20232.92%+0.01
30 Jun 20232.91%−0.44
15 Jun 20233.35%+0.09
31 May 20233.26%+0.14
15 May 20233.12%−0.01
28 Apr 20233.13%+0.07
14 Apr 20233.06%+0.08
31 Mar 20232.98%+0.11
15 Mar 20232.87%−0.08
28 Feb 20232.95%−0.08
15 Feb 20233.03%−0.09
31 Jan 20233.12%+0.37
13 Jan 20232.75%−0.06
30 Dec 20222.81%−0.35
15 Dec 20223.16%0.00
30 Nov 20223.16%−0.34
15 Nov 20223.50%−0.28
31 Oct 20223.78%−0.26
14 Oct 20224.04%+0.35
30 Sep 20223.69%−0.41
15 Sep 20224.10%−0.38
31 Aug 20224.48%+0.38
15 Aug 20224.10%+0.16
29 Jul 20223.94%+0.33
15 Jul 20223.61%+0.35
30 Jun 20223.26%+0.29
15 Jun 20222.97%−0.13
31 May 20223.10%−0.21
13 May 20223.31%+0.16
29 Apr 20223.15%−0.29
14 Apr 20223.44%0.00
31 Mar 20223.44%+0.04
15 Mar 20223.40%+0.22
28 Feb 20223.18%−0.31
15 Feb 20223.49%−0.36
31 Jan 20223.85%+0.65
14 Jan 20223.20%−0.03
31 Dec 20213.23%−0.44
15 Dec 20213.67%−0.29
30 Nov 20213.96%−0.07
15 Nov 20214.03%−1.15
29 Oct 20215.18%+0.07
15 Oct 20215.11%−0.18
30 Sep 20215.29%−0.10
15 Sep 20215.39%+0.28
31 Aug 20215.11%+0.23
13 Aug 20214.88%−0.17
30 Jul 20215.05%−0.27
15 Jul 20215.32%+0.37
30 Jun 20214.95%+0.39
15 Jun 20214.56%−0.27
28 May 20214.83%+0.49
14 May 20214.34%−0.27
30 Apr 20214.61%−0.13
15 Apr 20214.74%−0.34
31 Mar 20215.08%−0.26
15 Mar 20215.34%0.00
26 Feb 20215.34%−0.38
12 Feb 20215.72%+1.16
29 Jan 20214.56%−0.59
15 Jan 20215.15%−0.19
31 Dec 20205.34%+0.29
15 Dec 20205.05%−0.18
30 Nov 20205.23%−0.92
13 Nov 20206.15%−0.98
30 Oct 20207.13%+1.02
15 Oct 20206.11%−0.21
30 Sep 20206.32%+0.32
15 Sep 20206.00%+0.20
31 Aug 20205.80%−0.08
14 Aug 20205.88%+0.38
31 Jul 20205.50%+0.33
15 Jul 20205.17%+0.62
30 Jun 20204.55%+0.36
15 Jun 20204.19%+0.73
29 May 20203.46%+0.55
15 May 20202.91%−0.73
30 Apr 20203.64%+0.40
15 Apr 20203.24%−0.26
31 Mar 20203.50%−0.84
13 Mar 20204.34%+0.62
28 Feb 20203.72%+0.28
14 Feb 20203.44%−0.74
31 Jan 20204.18%+1.12
15 Jan 20203.06%−0.23
31 Dec 20193.29%−0.18
13 Dec 20193.47%+0.35
29 Nov 20193.12%−0.26
15 Nov 20193.38%+0.14
31 Oct 20193.24%−0.30
15 Oct 20193.54%+0.11
30 Sep 20193.43%+0.08
13 Sep 20193.35%−0.64
30 Aug 20193.99%−0.59
15 Aug 20194.58%−0.82
31 Jul 20195.40%−0.12
15 Jul 20195.52%−0.07
28 Jun 20195.59%+0.72
14 Jun 20194.87%−0.72
31 May 20195.59%−1.34
15 May 20196.93%−0.99
30 Apr 20197.92%+0.16
15 Apr 20197.76%−0.22
29 Mar 20197.98%+0.09
15 Mar 20197.89%+0.08
28 Feb 20197.81%−0.25
15 Feb 20198.06%−0.38
31 Jan 20198.44%−0.54
15 Jan 20198.98%+1.00
31 Dec 20187.98%+0.17
14 Dec 20187.81%+0.27
30 Nov 20187.54%+0.13
15 Nov 20187.41%−0.50
31 Oct 20187.91%−0.72
15 Oct 20188.63%+1.52
28 Sep 20187.11%−0.22
14 Sep 20187.33%−0.78
31 Aug 20188.11%+0.18
15 Aug 20187.93%+0.75
31 Jul 20187.18%+0.46
13 Jul 20186.72%+0.48
29 Jun 20186.24%−0.63
15 Jun 20186.87%−0.13
31 May 20187.00%+0.63
15 May 20186.37%+0.33
30 Apr 20186.04%−0.86
13 Apr 20186.90%+0.77
29 Mar 20186.13%−0.07
15 Mar 20186.20%+0.39
28 Feb 20185.81%+0.31
15 Feb 20185.50%+0.64
31 Jan 20184.86%−0.67
12 Jan 20185.53%+0.63
29 Dec 20174.90%–

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

Frequently asked questions

How shorted is F5, Inc. right now?
2.38% of F5, Inc.'s (FFIV) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 2,757th 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 FFIV'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 FFIV's days to cover?
2.95 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.