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HowShorted

How shorted is Phio Pharmaceuticals Corp.? PHIO

#3,163most shorted US stockof 3,805 ranked stocks, more shorted than 16%

1.29%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
−0.62
5 reports (~10 weeks)
−0.59
days to cover
1.00
Aggregate net short position time series for Phio Pharmaceuticals Corp.

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 Phio Pharmaceuticals Corp. 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 20262.47% 31 Jul 20262.75% 14 Aug 2026+0.28
7 May 20264.04% 30 Apr 20262.85% 15 May 2026−1.19
5 Mar 20264.91% 27 Feb 20265.04% 13 Mar 2026+0.13
13 Nov 20254.06% 31 Oct 20253.24% 14 Nov 2025−0.82
9 May 20244.02% 30 Apr 20243.81% 15 May 2024−0.21
2 Apr 20243.85% 15 Mar 20244.02% 30 Apr 2024+0.17
9 Nov 20231.51% 31 Oct 20230.89% 15 Nov 2023−0.62
10 Aug 20231.05% 31 Jul 20230.56% 15 Aug 2023−0.49

Fails to deliver

The SEC's fails-to-deliver figure for PHIO: 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
17,270
14 Sep 2026
Highest in window
2,311,187
11 Feb 2026
Days with a balance
136
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Phio Pharmaceuticals Corp. 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 2.3M shares.

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Sector: Healthcare

History

Full reported short interest history
Settlement dateShort %Change
15 Sep 20261.29%−0.62
31 Aug 20261.91%−0.84
14 Aug 20262.75%+0.28
31 Jul 20262.47%+0.94
15 Jul 20261.53%−0.35
30 Jun 20261.88%−0.72
15 Jun 20262.60%−0.10
29 May 20262.70%−0.15
15 May 20262.85%−1.19
30 Apr 20264.04%−0.44
15 Apr 20264.48%−0.44
31 Mar 20264.92%−0.12
13 Mar 20265.04%+0.13
27 Feb 20264.91%−1.13
30 Jan 20266.04%+1.62
15 Jan 20264.42%+1.59
31 Dec 20252.83%+0.95
15 Dec 20251.88%−0.44
28 Nov 20252.32%−0.92
14 Nov 20253.24%−0.82
31 Oct 20254.06%−0.67
15 Oct 20254.73%−0.07
30 Sep 20254.80%+0.22
15 Sep 20254.58%−0.49
29 Aug 20255.07%−2.42
15 Aug 20257.49%+5.84
31 Mar 20251.65%−1.45
28 Jun 20243.10%−0.21
14 Jun 20243.31%−0.55
31 May 20243.86%+0.05
15 May 20243.81%−0.21
30 Apr 20244.02%+0.17
15 Mar 20243.85%+3.30
31 Jan 20240.55%−0.03
30 Nov 20230.58%−0.31
15 Nov 20230.89%−0.62
31 Oct 20231.51%+0.66
29 Sep 20230.85%+0.07
15 Sep 20230.78%+0.12
31 Aug 20230.66%+0.10
15 Aug 20230.56%−0.49
31 Jul 20231.05%−1.56
14 Jul 20232.61%+0.41
30 Jun 20232.20%+0.90
15 May 20231.30%−1.30
28 Apr 20232.60%+1.40
14 Apr 20231.20%−0.41
31 Mar 20231.61%−1.05
15 Mar 20232.66%+2.40
15 Dec 20220.26%+0.02
30 Nov 20220.24%−0.04
15 Nov 20220.28%−0.18
31 Oct 20220.46%−0.25
14 Oct 20220.71%+0.11
30 Sep 20220.60%−0.04
15 Sep 20220.64%+0.20
31 Aug 20220.44%−0.20
15 Aug 20220.64%0.00
29 Jul 20220.64%+0.08
15 Jul 20220.56%−0.37
30 Jun 20220.93%−0.89
15 Jun 20221.82%−0.90
31 May 20222.72%+1.38
13 May 20221.34%+0.77
15 Mar 20220.57%+0.19
28 Feb 20220.38%−0.14
15 Feb 20220.52%−0.68
31 Jan 20221.20%−1.23
31 Dec 20212.43%−0.34
15 Dec 20212.77%−0.61
30 Nov 20213.38%+0.21
15 Nov 20213.17%−0.06
29 Oct 20213.23%−0.11
15 Oct 20213.34%−0.34
30 Sep 20213.68%−3.23
15 Sep 20216.91%−0.95
31 Aug 20217.86%−0.57
13 Aug 20218.43%−1.21
30 Jul 20219.64%+1.21
15 Jul 20218.43%+0.66
30 Jun 20217.77%−0.64
15 Jun 20218.41%−3.05
28 May 202111.46%+1.64
14 May 20219.82%+4.93
30 Apr 20214.89%+0.25
15 Apr 20214.64%+0.69
31 Mar 20213.95%+2.45
30 Nov 20201.50%−1.51
13 Nov 20203.01%+1.50
30 Oct 20201.51%+0.13
31 Aug 20201.38%−0.80
14 Aug 20202.18%+1.86
15 Apr 20200.32%+0.17
31 Mar 20200.15%−1.20
31 Dec 20191.35%+0.35
13 Dec 20191.00%−0.45
29 Nov 20191.45%−1.32
15 Nov 20192.77%+0.70
31 Oct 20192.07%+0.69
15 Oct 20191.38%−0.96
15 Nov 20182.34%−4.62
29 Dec 20176.96%–

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

Frequently asked questions

How shorted is Phio Pharmaceuticals Corp. right now?
1.29% of Phio Pharmaceuticals Corp.'s (PHIO) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 3,163rd 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 PHIO'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 PHIO's days to cover?
1.00 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.