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HowShorted

How shorted is Q32 Bio Inc.? QTTB

#435most shorted US stockof 3,805 ranked stocks, more shorted than 88%

12.67%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
+0.72
5 reports (~10 weeks)
+6.78
days to cover
5.15
Aggregate net short position time series for Q32 Bio 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 Q32 Bio 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
5 May 20264.46% 30 Apr 20264.32% 15 May 2026−0.14
10 Mar 20262.94% 27 Feb 20262.40% 13 Mar 2026−0.54
13 Nov 20252.24% 31 Oct 20252.26% 14 Nov 2025+0.02
6 Aug 20253.38% 31 Jul 20252.92% 15 Aug 2025−0.46
8 May 20254.54% 30 Apr 20255.14% 15 May 2025+0.60
11 Mar 20258.42% 28 Feb 20258.27% 14 Mar 2025−0.15
7 Nov 20245.69% 31 Oct 20245.13% 15 Nov 2024−0.56
9 May 20240.18% 30 Apr 20240.27% 15 May 2024+0.09

Fails to deliver

The SEC's fails-to-deliver figure for QTTB: 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
1,133
14 Sep 2026
Highest in window
353,784
2 Dec 2025
Days with a balance
84
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Q32 Bio 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 354K shares.

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Sector: Healthcare

History

Full reported short interest history
Settlement dateShort %Change
15 Sep 202612.67%+0.72
31 Aug 202611.95%+1.41
14 Aug 202610.54%+5.91
30 Jun 20264.63%−1.56
15 Jun 20266.19%+0.30
29 May 20265.89%+1.57
15 May 20264.32%−0.14
30 Apr 20264.46%+1.85
15 Apr 20262.61%−0.20
31 Mar 20262.81%+0.41
13 Mar 20262.40%−0.54
27 Feb 20262.94%−0.03
13 Feb 20262.97%+0.46
30 Jan 20262.51%+0.36
15 Jan 20262.15%−0.14
31 Dec 20252.29%−1.20
15 Dec 20253.49%+1.09
28 Nov 20252.40%+0.14
14 Nov 20252.26%+0.02
31 Oct 20252.24%−1.57
15 Oct 20253.81%+1.53
30 Sep 20252.28%−0.09
15 Sep 20252.37%−0.15
29 Aug 20252.52%−0.40
15 Aug 20252.92%−0.46
31 Jul 20253.38%−1.18
15 Jul 20254.56%+2.38
30 Jun 20252.18%−0.97
13 Jun 20253.15%−0.62
30 May 20253.77%−1.37
15 May 20255.14%+0.60
30 Apr 20254.54%−1.23
15 Apr 20255.77%−1.35
31 Mar 20257.12%−1.15
14 Mar 20258.27%−0.15
28 Feb 20258.42%−2.37
14 Feb 202510.79%−0.19
31 Jan 202510.98%+0.02
15 Jan 202510.96%−1.14
31 Dec 202412.10%+2.89
13 Dec 20249.21%+3.31
29 Nov 20245.90%+0.77
15 Nov 20245.13%−0.56
31 Oct 20245.69%+0.06
15 Oct 20245.63%+0.59
30 Sep 20245.04%+1.08
13 Sep 20243.96%+0.94
30 Aug 20243.02%+0.42
15 Aug 20242.60%+2.06
28 Jun 20240.54%+0.17
14 Jun 20240.37%−0.13
31 May 20240.50%+0.23
15 May 20240.27%+0.09
30 Apr 20240.18%+0.07
15 Apr 20240.11%−0.59
15 Mar 20240.70%+0.12
29 Feb 20240.58%+0.02
15 Feb 20240.56%+0.02
31 Jan 20240.54%+0.04
12 Jan 20240.50%−0.03
29 Dec 20230.53%−0.13
15 Dec 20230.66%−0.11
30 Nov 20230.77%+0.26
15 Nov 20230.51%−0.04
31 Oct 20230.55%+0.02
13 Oct 20230.53%+0.10
29 Sep 20230.43%−0.05
15 Sep 20230.48%0.00
31 Aug 20230.48%−0.06
15 Aug 20230.54%−0.01
31 Jul 20230.55%+0.05
14 Jul 20230.50%+0.05
30 Jun 20230.45%−0.08
15 Jun 20230.53%+0.05
31 May 20230.48%+0.01
15 May 20230.47%−0.14
28 Apr 20230.61%−0.10
14 Apr 20230.71%−0.03
31 Mar 20230.74%+0.14
15 Mar 20230.60%−0.01
28 Feb 20230.61%−0.09
15 Feb 20230.70%−0.14
31 Jan 20230.84%−0.12
13 Jan 20230.96%−0.11
30 Dec 20221.07%−0.12
15 Dec 20221.19%−0.19
30 Nov 20221.38%−0.47
15 Nov 20221.85%−0.10
31 Oct 20221.95%−0.09
14 Oct 20222.04%−0.35
30 Sep 20222.39%+0.44
15 Sep 20221.95%+0.38
31 Aug 20221.57%+0.03
15 Aug 20221.54%−0.48
29 Jul 20222.02%+0.27
15 Jul 20221.75%−0.18
30 Jun 20221.93%−2.20
15 Jun 20224.13%−0.14
31 May 20224.27%−0.48
13 May 20224.75%−0.23
29 Apr 20224.98%+0.95
14 Apr 20224.03%+0.09
31 Mar 20223.94%+0.25
15 Mar 20223.69%+0.01
28 Feb 20223.68%−3.44
15 Feb 20227.12%−0.34
31 Jan 20227.46%−0.47
14 Jan 20227.93%+0.05
31 Dec 20217.88%+0.74
15 Dec 20217.14%−0.10
30 Nov 20217.24%+0.46
15 Nov 20216.78%+0.90
29 Oct 20215.88%+1.73
15 Oct 20214.15%+0.29
30 Sep 20213.86%−0.13
15 Sep 20213.99%−0.89
31 Aug 20214.88%−0.26
13 Aug 20215.14%−0.71
30 Jul 20215.85%+0.54
15 Jul 20215.31%−0.30
30 Jun 20215.61%−0.64
15 Jun 20216.25%−0.27
28 May 20216.52%+0.46
14 May 20216.06%−0.12
30 Apr 20216.18%−0.47
15 Apr 20216.65%+2.37
31 Mar 20214.28%−0.15
15 Mar 20214.43%−0.06
26 Feb 20214.49%−0.12
12 Feb 20214.61%−0.27
29 Jan 20214.88%+0.12
15 Jan 20214.76%−0.81
31 Dec 20205.57%−0.31
15 Dec 20205.88%−0.40
30 Nov 20206.28%−0.26
13 Nov 20206.54%−1.74
30 Oct 20208.28%−2.08
15 Oct 202010.36%+0.57
30 Sep 20209.79%−2.40
15 Sep 202012.19%+0.37
31 Aug 202011.82%−0.40
14 Aug 202012.22%+0.77
31 Jul 202011.45%+1.21
15 Jul 202010.24%+1.25
30 Jun 20208.99%+3.07
15 Jun 20205.92%−0.39
29 May 20206.31%−0.11
15 May 20206.42%−0.57
30 Apr 20206.99%−0.04
15 Apr 20207.03%+0.02
31 Mar 20207.01%−0.93
13 Mar 20207.94%−0.66
28 Feb 20208.60%+0.18
14 Feb 20208.42%+0.26
31 Jan 20208.16%+0.19
15 Jan 20207.97%+1.05
31 Dec 20196.92%+0.42
13 Dec 20196.50%−0.13
29 Nov 20196.63%−2.40
15 Nov 20199.03%+0.56
31 Oct 20198.47%−0.46
15 Oct 20198.93%–

Newest first. Scroll inside the table for earlier dates, back to 15 Oct 2019.

Frequently asked questions

How shorted is Q32 Bio Inc. right now?
12.67% of Q32 Bio Inc.'s (QTTB) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 435th 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 QTTB'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 QTTB's days to cover?
5.15 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.