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HowShorted

How shorted is Definium Therapeutics, Inc.? DFTX

#855most shorted US stockof 3,805 ranked stocks, more shorted than 77%

8.77%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
+1.45
5 reports (~10 weeks)
−4.03
days to cover
5.19
Aggregate net short position time series for Definium Therapeutics, 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 Definium Therapeutics, 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 20267.99% 31 Jul 20266.68% 14 Aug 2026−1.31
6 Nov 202512.02% 31 Oct 202512.47% 14 Nov 2025+0.45
29 Oct 202513.23% 15 Oct 202512.02% 31 Oct 2025−1.21
31 Jul 202514.86% 15 Jul 202513.53% 15 Aug 2025−1.33
8 May 202514.22% 30 Apr 202515.22% 15 May 2025+1.00
6 Mar 202516.10% 28 Feb 202515.51% 14 Mar 2025−0.59
7 Nov 202413.61% 31 Oct 202413.71% 15 Nov 2024+0.10
13 Aug 202413.83% 31 Jul 202413.56% 15 Aug 2024−0.27

Fails to deliver

The SEC's fails-to-deliver figure for DFTX: 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
257
9 Sep 2026
Highest in window
208,838
15 Jan 2026
Days with a balance
71
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Definium Therapeutics, 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 209K shares.

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Sector: Healthcare

History

Full reported short interest history
Settlement dateShort %Change
15 Sep 20268.77%+1.45
31 Aug 20267.32%+0.64
14 Aug 20266.68%−1.31
31 Jul 20267.99%−7.29
31 Dec 202515.28%+2.48
15 Dec 202512.80%+0.26
28 Nov 202512.54%+0.07
14 Nov 202512.47%+0.45
31 Oct 202512.02%−1.21
15 Oct 202513.23%+0.27
30 Sep 202512.96%−1.09
15 Sep 202514.05%+0.65
29 Aug 202513.40%−0.13
15 Aug 202513.53%−0.23
31 Jul 202513.76%−1.10
15 Jul 202514.86%+0.08
30 Jun 202514.78%+0.13
13 Jun 202514.65%−0.95
30 May 202515.60%+0.38
15 May 202515.22%+1.00
30 Apr 202514.22%−0.32
15 Apr 202514.54%−0.92
31 Mar 202515.46%−0.05
14 Mar 202515.51%−0.59
28 Feb 202516.10%+1.26
14 Feb 202514.84%+0.84
31 Jan 202514.00%−0.23
15 Jan 202514.23%+0.62
31 Dec 202413.61%+0.73
13 Dec 202412.88%−0.36
29 Nov 202413.24%−0.47
15 Nov 202413.71%+0.10
31 Oct 202413.61%−0.55
15 Oct 202414.16%−0.20
30 Sep 202414.36%+1.27
13 Sep 202413.09%−0.64
30 Aug 202413.73%+0.17
15 Aug 202413.56%−0.27
31 Jul 202413.83%+0.97
15 Jul 202412.86%+2.59
28 Jun 202410.27%+0.89
14 Jun 20249.38%+0.50
31 May 20248.88%+0.35
15 May 20248.53%+0.11
30 Apr 20248.42%−8.33
15 Apr 202416.75%−0.73
28 Mar 202417.48%+3.29
15 Mar 202414.19%+3.98
29 Feb 202410.21%+1.92
15 Feb 20248.29%+0.33
31 Jan 20247.96%−0.06
12 Jan 20248.02%+0.20
29 Dec 20237.82%+0.81
15 Dec 20237.01%+0.81
30 Nov 20236.20%−0.71
15 Nov 20236.91%−0.28
31 Oct 20237.19%−0.68
13 Oct 20237.87%−0.16
29 Sep 20238.03%−0.30
15 Sep 20238.33%+0.30
31 Aug 20238.03%−0.42
15 Aug 20238.45%−0.11
31 Jul 20238.56%+0.82
14 Jul 20237.74%−0.18
30 Jun 20237.92%+0.25
15 Jun 20237.67%+0.35
31 May 20237.32%−0.05
15 May 20237.37%−0.47
28 Apr 20237.84%+0.85
14 Apr 20236.99%−0.11
31 Mar 20237.10%−0.45
15 Mar 20237.55%−0.60
28 Feb 20238.15%−0.13
15 Feb 20238.28%+0.56
31 Jan 20237.72%+1.40
13 Jan 20236.32%+0.25
30 Dec 20226.07%+0.31
15 Dec 20225.76%+0.40
30 Nov 20225.36%+0.88
15 Nov 20224.48%−0.05
31 Oct 20224.53%+0.55
15 Aug 20223.98%−0.49
29 Jul 20224.47%+0.09
15 Jul 20224.38%−0.49
30 Jun 20224.87%−3.55
15 Jun 20228.42%−0.45
31 May 20228.87%−0.17
13 May 20229.04%+1.40
29 Apr 20227.64%+0.39
14 Apr 20227.25%+0.74
31 Mar 20226.51%+0.18
15 Mar 20226.33%−0.03
28 Feb 20226.36%–

Newest first. Scroll inside the table for earlier dates, back to 28 Feb 2022.

Frequently asked questions

How shorted is Definium Therapeutics, Inc. right now?
8.77% of Definium Therapeutics, Inc.'s (DFTX) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 855th 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 DFTX'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 DFTX's days to cover?
5.19 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.