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HowShorted

How shorted is RESEARCH FRONTIERS INC? REFR

#3,226most shorted US stockof 3,805 ranked stocks, more shorted than 15%

1.12%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
−0.12
5 reports (~10 weeks)
+0.19
days to cover
2.85
Aggregate net short position time series for RESEARCH FRONTIERS 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 RESEARCH FRONTIERS INC days to cover

Fails to deliver

The SEC's fails-to-deliver figure for REFR: 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
1,324
31 Aug 2026
Highest in window
15,641
26 Jun 2026
Days with a balance
45
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for RESEARCH FRONTIERS 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 16K shares.

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Sector: Financials

History

Full reported short interest history
Settlement dateShort %Change
15 Sep 20261.12%−0.12
31 Aug 20261.24%+0.20
14 Aug 20261.04%+0.24
31 Jul 20260.80%−0.19
15 Jul 20260.99%+0.06
30 Jun 20260.93%−0.10
15 Jun 20261.03%+0.05
29 May 20260.98%−0.01
15 May 20260.99%+0.05
30 Apr 20260.94%−0.04
15 Apr 20260.98%−0.01
31 Mar 20260.99%+0.11
13 Mar 20260.88%+0.06
27 Feb 20260.82%+0.02
13 Feb 20260.80%+0.04
30 Jan 20260.76%−0.01
15 Jan 20260.77%0.00
31 Dec 20250.77%−0.03
15 Dec 20250.80%−0.05
28 Nov 20250.85%+0.02
14 Nov 20250.83%−0.02
31 Oct 20250.85%+0.02
15 Oct 20250.83%−0.02
30 Sep 20250.85%+0.02
15 Sep 20250.83%+0.01
29 Aug 20250.82%−0.03
15 Aug 20250.85%−0.07
31 Jul 20250.92%+0.04
15 Jul 20250.88%−0.01
30 Jun 20250.89%−0.05
13 Jun 20250.94%+0.01
30 May 20250.93%−0.02
15 May 20250.95%+0.11
30 Apr 20250.84%−0.01
15 Apr 20250.85%−0.02
31 Mar 20250.87%0.00
14 Mar 20250.87%−0.04
28 Feb 20250.91%+0.01
14 Feb 20250.90%−0.01
31 Jan 20250.91%−0.04
15 Jan 20250.95%+0.02
31 Dec 20240.93%−0.02
13 Dec 20240.95%−0.05
29 Nov 20241.00%−0.07
15 Nov 20241.07%−0.01
31 Oct 20241.08%+0.02
15 Oct 20241.06%−0.04
30 Sep 20241.10%−0.02
13 Sep 20241.12%0.00
30 Aug 20241.12%−0.04
15 Aug 20241.16%0.00
31 Jul 20241.16%−0.02
15 Jul 20241.18%−0.09
28 Jun 20241.27%+0.16
14 Jun 20241.11%+0.03
31 May 20241.08%+0.03
15 May 20241.05%−0.07
30 Apr 20241.12%−0.02
15 Apr 20241.14%0.00
28 Mar 20241.14%0.00
15 Mar 20241.14%−0.02
29 Feb 20241.16%+0.03
15 Feb 20241.13%−0.02
31 Jan 20241.15%−0.16
12 Jan 20241.31%−0.16
29 Dec 20231.47%−0.15
15 Dec 20231.62%−0.18
30 Nov 20231.80%−0.16
15 Nov 20231.96%−0.01
31 Oct 20231.97%0.00
13 Oct 20231.97%−0.01
29 Sep 20231.98%−0.04
15 Sep 20232.02%+0.02
31 Aug 20232.00%−0.03
15 Aug 20232.03%−0.05
31 Jul 20232.08%−0.02
14 Jul 20232.10%−0.02
30 Jun 20232.12%−0.10
15 Jun 20232.22%+0.10
31 May 20232.12%−0.03
15 May 20232.15%−0.01
28 Apr 20232.16%−0.01
14 Apr 20232.17%−0.03
31 Mar 20232.20%−0.06
15 Mar 20232.26%0.00
28 Feb 20232.26%+0.01
15 Feb 20232.25%+0.10
31 Jan 20232.15%+0.05
13 Jan 20232.10%−0.08
30 Dec 20222.18%+0.03
15 Dec 20222.15%−0.08
30 Nov 20222.23%+0.07
15 Nov 20222.16%+0.04
31 Oct 20222.12%+0.13
14 Oct 20221.99%+0.09
30 Sep 20221.90%+0.02
15 Sep 20221.88%−0.06
31 Aug 20221.94%+0.08
15 Aug 20221.86%−0.19
29 Jul 20222.05%+0.04
15 Jul 20222.01%−0.05
30 Jun 20222.06%−0.13
15 Jun 20222.19%+0.03
31 May 20222.16%+0.08
13 May 20222.08%−0.16
29 Apr 20222.24%+0.08
14 Apr 20222.16%−0.13
31 Mar 20222.29%+0.10
15 Mar 20222.19%−0.14
28 Feb 20222.33%−0.07
15 Feb 20222.40%+0.29
31 Jan 20222.11%−0.16
14 Jan 20222.27%−0.23
31 Dec 20212.50%+0.19
15 Dec 20212.31%−0.07
30 Nov 20212.38%−0.21
15 Nov 20212.59%+0.12
29 Oct 20212.47%−0.41
15 Oct 20212.88%−0.25
30 Sep 20213.13%−0.44
15 Sep 20213.57%+0.64
31 Aug 20212.93%−0.30
13 Aug 20213.23%+0.02
30 Jul 20213.21%−0.05
15 Jul 20213.26%−0.24
30 Jun 20213.50%−4.29
15 Jun 20217.79%+1.69
28 May 20216.10%−0.17
14 May 20216.27%−0.18
30 Apr 20216.45%−0.98
15 Apr 20217.43%+1.45
31 Mar 20215.98%+0.45
15 Mar 20215.53%+0.02
26 Feb 20215.51%+0.38
12 Feb 20215.13%+0.07
29 Jan 20215.06%+0.72
15 Jan 20214.34%−0.21
31 Dec 20204.55%−0.33
15 Dec 20204.88%−0.06
30 Nov 20204.94%−0.39
13 Nov 20205.33%−0.59
30 Oct 20205.92%−0.80
15 Oct 20206.72%−0.35
30 Sep 20207.07%+0.01
15 Sep 20207.06%+0.14
31 Aug 20206.92%−1.32
14 Aug 20208.24%−0.14
31 Jul 20208.38%−0.23
15 Jul 20208.61%−0.74
30 Jun 20209.35%+3.00
15 Jun 20206.35%+0.88
29 May 20205.47%+0.20
15 May 20205.27%−0.03
30 Apr 20205.30%−0.22
15 Apr 20205.52%−0.62
31 Mar 20206.14%−3.33
13 Mar 20209.47%−0.46
28 Feb 20209.93%−0.13
14 Feb 202010.06%0.00
31 Jan 202010.06%−0.36
15 Jan 202010.42%+0.03
31 Dec 201910.39%−0.09
13 Dec 201910.48%−0.08
29 Nov 201910.56%−0.28
15 Nov 201910.84%+0.88
31 Oct 20199.96%−0.04
15 Oct 201910.00%−0.17
30 Sep 201910.17%+0.69
13 Sep 20199.48%+1.05
30 Aug 20198.43%+0.47
15 Aug 20197.96%+0.19
31 Jul 20197.77%+0.47
15 Jul 20197.30%+0.04
28 Jun 20197.26%−0.04
14 Jun 20197.30%−0.11
31 May 20197.41%−0.05
15 May 20197.46%+0.25
30 Apr 20197.21%+1.32
15 Apr 20195.89%+0.59
29 Mar 20195.30%+1.00
15 Mar 20194.30%+0.34
28 Feb 20193.96%−0.03
15 Feb 20193.99%+1.65
31 Jan 20192.34%+0.21
15 Jan 20192.13%+0.79
31 Dec 20181.34%+0.04
14 Dec 20181.30%−0.81
30 Nov 20182.11%+0.77
15 Nov 20181.34%−0.97
31 Oct 20182.31%−0.12
15 Oct 20182.43%−0.14
28 Sep 20182.57%+1.22
14 Sep 20181.35%−0.69
31 Aug 20182.04%+0.79
15 Aug 20181.25%−0.11
31 Jul 20181.36%−0.02
13 Jul 20181.38%−0.05
29 Jun 20181.43%−0.09
15 Jun 20181.52%−0.94
31 May 20182.46%−0.22
15 May 20182.68%+1.07
30 Apr 20181.61%−0.43
13 Apr 20182.04%−0.61
29 Mar 20182.65%+1.03
15 Mar 20181.62%+0.03
28 Feb 20181.59%−0.93
15 Feb 20182.52%+0.13
31 Jan 20182.39%−0.26
12 Jan 20182.65%−0.04
29 Dec 20172.69%–

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

Frequently asked questions

How shorted is RESEARCH FRONTIERS INC right now?
1.12% of RESEARCH FRONTIERS INC's (REFR) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 3,226th 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 REFR'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 REFR's days to cover?
2.85 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.