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HowShorted

How shorted is Fulcrum Therapeutics, Inc.? FULC

#759most shorted US stockof 3,805 ranked stocks, more shorted than 80%

9.43%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
+0.23
5 reports (~10 weeks)
−0.21
days to cover
5.87
Aggregate net short position time series for Fulcrum 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 Fulcrum 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
27 Apr 202613.96% 15 Apr 202611.96% 30 Apr 2026−2.00
24 Feb 20266.50% 13 Feb 20267.78% 27 Feb 2026+1.28
12 Jan 20266.04% 31 Dec 20256.63% 15 Jan 2026+0.59
29 Oct 20256.56% 15 Oct 20256.51% 31 Oct 2025−0.05
29 Jul 20259.11% 15 Jul 20259.28% 31 Jul 2025+0.17
1 May 20256.30% 30 Apr 20259.13% 15 May 2025+2.83
25 Feb 20258.24% 14 Feb 20259.11% 28 Feb 2025+0.87
13 Jan 20257.85% 31 Dec 20248.67% 15 Jan 2025+0.82

Fails to deliver

The SEC's fails-to-deliver figure for FULC: 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
15,212
4 Sep 2026
Highest in window
129,760
18 Jun 2026
Days with a balance
35
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Fulcrum 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 130K shares.

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Sector: Healthcare

History

Full reported short interest history
Settlement dateShort %Change
15 Sep 20269.43%+0.23
31 Aug 20269.20%+0.48
14 Aug 20268.72%+0.03
31 Jul 20268.69%−1.68
15 Jul 202610.37%+0.73
30 Jun 20269.64%+1.35
15 Jun 20268.29%−3.71
29 May 202612.00%+0.29
15 May 202611.71%−0.25
30 Apr 202611.96%−2.00
15 Apr 202613.96%+1.10
31 Mar 202612.86%+3.75
13 Mar 20269.11%+1.33
27 Feb 20267.78%+1.28
13 Feb 20266.50%−0.66
30 Jan 20267.16%+0.53
15 Jan 20266.63%+0.59
31 Dec 20256.04%+0.51
15 Dec 20255.53%−1.50
28 Nov 20257.03%+0.44
14 Nov 20256.59%+0.08
31 Oct 20256.51%−0.05
15 Oct 20256.56%+0.37
30 Sep 20256.19%−0.63
15 Sep 20256.82%−0.06
29 Aug 20256.88%−3.89
15 Aug 202510.77%+1.49
31 Jul 20259.28%+0.17
15 Jul 20259.11%−1.34
30 Jun 202510.45%−0.33
13 Jun 202510.78%+0.25
30 May 202510.53%+1.40
15 May 20259.13%+2.83
30 Apr 20256.30%−0.31
15 Apr 20256.61%−0.31
31 Mar 20256.92%−2.76
14 Mar 20259.68%+0.57
28 Feb 20259.11%+0.87
14 Feb 20258.24%+0.21
31 Jan 20258.03%−0.64
15 Jan 20258.67%+0.82
31 Dec 20247.85%−0.04
13 Dec 20247.89%−0.61
29 Nov 20248.50%−0.17
15 Nov 20248.67%+0.70
31 Oct 20247.97%−0.88
15 Oct 20248.85%−0.60
30 Sep 20249.45%−8.82
13 Sep 202418.27%+5.36
30 Aug 202412.91%−0.16
15 Aug 202413.07%+0.76
31 Jul 202412.31%+0.63
15 Jul 202411.68%+3.17
28 Jun 20248.51%+2.27
14 Jun 20246.24%+0.47
31 May 20245.77%+0.80
15 May 20244.97%+0.13
30 Apr 20244.84%+0.74
15 Apr 20244.10%+0.44
28 Mar 20243.66%−0.20
15 Mar 20243.86%−1.31
29 Feb 20245.17%−0.03
15 Feb 20245.20%−0.27
31 Jan 20245.47%−1.06
12 Jan 20246.53%+0.59
29 Dec 20235.94%+0.55
15 Dec 20235.39%−1.18
30 Nov 20236.57%+0.58
15 Nov 20235.99%−0.41
31 Oct 20236.40%+0.08
13 Oct 20236.32%−0.19
29 Sep 20236.51%+0.45
15 Sep 20236.06%+0.30
31 Aug 20235.76%+1.34
15 Aug 20234.42%−1.25
31 Jul 20235.67%−0.01
14 Jul 20235.68%−0.23
30 Jun 20235.91%−1.42
15 Jun 20237.33%+0.64
31 May 20236.69%+0.31
15 May 20236.38%−1.35
28 Apr 20237.73%−0.57
14 Apr 20238.30%+0.30
31 Mar 20238.00%+1.61
15 Mar 20236.39%−1.40
28 Feb 20237.79%+0.57
15 Feb 20237.22%+0.41
31 Jan 20236.81%+0.43
13 Jan 20236.38%−0.50
30 Dec 20226.88%+1.20
15 Dec 20225.68%−0.59
30 Nov 20226.27%−0.28
15 Nov 20226.55%−1.93
31 Oct 20228.48%+0.03
14 Oct 20228.45%−0.32
30 Sep 20228.77%−0.69
15 Sep 20229.46%+1.16
31 Aug 20228.30%+0.40
15 Aug 20227.90%−0.75
29 Jul 20228.65%−0.56
15 Jul 20229.21%+0.13
30 Jun 20229.08%+0.57
15 Jun 20228.51%−0.64
31 May 20229.15%+0.78
13 May 20228.37%−2.41
29 Apr 202210.78%+4.16
14 Apr 20226.62%−0.01
31 Mar 20226.63%−0.35
15 Mar 20226.98%+0.79
28 Feb 20226.19%−0.32
15 Feb 20226.51%+1.34
31 Jan 20225.17%+0.75
14 Jan 20224.42%−0.11
31 Dec 20214.53%+0.33
15 Dec 20214.20%−0.96
30 Nov 20215.16%−2.31
15 Nov 20217.47%+2.38
29 Oct 20215.09%−1.25
15 Oct 20216.34%+0.03
30 Sep 20216.31%+1.10
15 Sep 20215.21%+0.26
31 Aug 20214.95%−2.71
13 Aug 20217.66%+5.53
30 Jul 20212.13%−0.17
15 Jul 20212.30%−0.32
30 Jun 20212.62%+0.59
15 Jun 20212.03%−0.05
28 May 20212.08%−0.11
14 May 20212.19%−0.09
30 Apr 20212.28%−0.53
15 Apr 20212.81%+0.01
31 Mar 20212.80%+0.23
15 Mar 20212.57%+0.05
26 Feb 20212.52%−0.12
12 Feb 20212.64%+0.06
29 Jan 20212.58%−0.71
15 Jan 20213.29%−0.36
31 Dec 20203.65%+0.43
15 Dec 20203.22%−0.17
30 Nov 20203.39%−0.37
13 Nov 20203.76%−1.05
30 Oct 20204.81%+0.40
15 Oct 20204.41%+0.23
30 Sep 20204.18%+1.07
15 Sep 20203.11%+0.40
31 Aug 20202.71%+1.30
14 Aug 20201.41%−0.73
31 Jul 20202.14%+0.13
15 Jul 20202.01%−1.21
30 Jun 20203.22%+0.85
15 Jun 20202.37%+0.05
29 May 20202.32%−0.02
15 May 20202.34%−0.17
30 Apr 20202.51%+0.05
15 Apr 20202.46%+0.47
31 Mar 20201.99%+0.85
13 Mar 20201.14%+0.17
28 Feb 20200.97%+0.20
14 Feb 20200.77%+0.18
31 Jan 20200.59%+0.08
15 Jan 20200.51%+0.08
31 Dec 20190.43%−0.50
13 Dec 20190.93%+0.12
29 Nov 20190.81%−0.15
15 Nov 20190.96%+0.11
31 Oct 20190.85%+0.08
15 Oct 20190.77%–

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

Frequently asked questions

How shorted is Fulcrum Therapeutics, Inc. right now?
9.43% of Fulcrum Therapeutics, Inc.'s (FULC) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 759th 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 FULC'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 FULC's days to cover?
5.87 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.