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HowShorted

How shorted is Black Diamond Therapeutics, Inc.? BDTX

#828most shorted US stockof 3,805 ranked stocks, more shorted than 78%

8.96%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
−1.69
5 reports (~10 weeks)
+1.10
days to cover
10.13
Aggregate net short position time series for Black Diamond 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 Black Diamond 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
5 Aug 202610.20% 31 Jul 202610.77% 14 Aug 2026+0.57
7 May 20267.82% 30 Apr 20269.19% 15 May 2026+1.37
16 Mar 20268.83% 13 Mar 20268.85% 31 Mar 2026+0.02
3 Dec 202510.75% 28 Nov 202511.06% 15 Dec 2025+0.31
6 Nov 202510.84% 31 Oct 202511.16% 14 Nov 2025+0.32
7 Aug 202511.44% 31 Jul 202512.12% 15 Aug 2025+0.68
12 May 202516.66% 30 Apr 202514.25% 15 May 2025−2.41
6 Mar 202513.08% 28 Feb 202512.64% 14 Mar 2025−0.44

Fails to deliver

The SEC's fails-to-deliver figure for BDTX: 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
213
10 Sep 2026
Highest in window
176,382
29 Jun 2026
Days with a balance
51
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Black Diamond 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 176K shares.

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Sector: Healthcare

History

Full reported short interest history
Settlement dateShort %Change
15 Sep 20268.96%−1.69
31 Aug 202610.65%−0.12
14 Aug 202610.77%+0.57
31 Jul 202610.20%−0.01
15 Jul 202610.21%+2.35
30 Jun 20267.86%−0.84
15 Jun 20268.70%−1.83
29 May 202610.53%+1.34
15 May 20269.19%+1.37
30 Apr 20267.82%−1.73
15 Apr 20269.55%+0.70
31 Mar 20268.85%+0.02
13 Mar 20268.83%+0.71
27 Feb 20268.12%+0.87
13 Feb 20267.25%0.00
30 Jan 20267.25%+0.66
15 Jan 20266.59%−0.06
31 Dec 20256.65%−4.41
15 Dec 202511.06%+0.31
28 Nov 202510.75%−0.41
14 Nov 202511.16%+0.32
31 Oct 202510.84%−0.05
15 Oct 202510.89%−0.23
30 Sep 202511.12%−1.41
15 Sep 202512.53%+0.19
29 Aug 202512.34%+0.22
15 Aug 202512.12%+0.68
31 Jul 202511.44%+0.74
15 Jul 202510.70%+0.45
30 Jun 202510.25%−1.81
13 Jun 202512.06%−1.30
30 May 202513.36%−0.89
15 May 202514.25%−2.41
30 Apr 202516.66%−0.34
15 Apr 202517.00%−0.96
31 Mar 202517.96%+5.32
14 Mar 202512.64%−0.44
28 Feb 202513.08%−0.57
14 Feb 202513.65%+1.18
31 Jan 202512.47%−0.77
15 Jan 202513.24%+2.00
31 Dec 202411.24%−0.07
13 Dec 202411.31%+0.48
29 Nov 202410.83%+0.34
15 Nov 202410.49%−0.69
31 Oct 202411.18%−1.78
15 Oct 202412.96%+0.74
30 Sep 202412.22%+1.85
13 Sep 202410.37%−0.37
30 Aug 202410.74%+0.10
15 Aug 202410.64%+2.06
31 Jul 20248.58%−0.57
15 Jul 20249.15%+2.95
28 Jun 20246.20%+0.48
14 Jun 20245.72%+0.66
31 May 20245.06%+0.92
15 May 20244.14%+0.28
30 Apr 20243.86%+0.46
15 Apr 20243.40%−0.55
28 Mar 20243.95%+0.45
15 Mar 20243.50%+0.05
29 Feb 20243.45%−0.20
15 Feb 20243.65%−1.00
31 Jan 20244.65%−2.27
12 Jan 20246.92%−0.09
29 Dec 20237.01%−0.04
15 Dec 20237.05%+0.42
30 Nov 20236.63%+0.12
15 Nov 20236.51%+0.02
31 Oct 20236.49%+0.73
13 Oct 20235.76%+1.12
29 Sep 20234.64%+1.88
15 Sep 20232.76%+0.54
31 Aug 20232.22%+0.16
15 Aug 20232.06%−6.65
14 Jul 20238.71%+3.41
15 Jun 20235.30%−0.02
31 May 20235.32%0.00
15 May 20235.32%−0.10
28 Apr 20235.42%0.00
14 Apr 20235.42%−0.08
31 Mar 20235.50%−0.07
15 Mar 20235.57%+0.15
28 Feb 20235.42%−0.05
15 Feb 20235.47%−0.01
31 Jan 20235.48%−0.11
13 Jan 20235.59%−0.13
30 Dec 20225.72%+0.30
15 Dec 20225.42%−0.01
30 Nov 20225.43%−0.11
15 Nov 20225.54%−0.16
31 Oct 20225.70%−0.43
14 Oct 20226.13%+0.35
30 Sep 20225.78%0.00
15 Sep 20225.78%−0.22
31 Aug 20226.00%−0.02
15 Aug 20226.02%−0.26
29 Jul 20226.28%−0.55
15 Jul 20226.83%−0.38
30 Jun 20227.21%−1.60
15 Jun 20228.81%−0.95
31 May 20229.76%−0.18
13 May 20229.94%+0.13
29 Apr 20229.81%+0.77
14 Apr 20229.04%+0.32
31 Mar 20228.72%−0.14
15 Mar 20228.86%−0.16
28 Feb 20229.02%+0.26
15 Feb 20228.76%−0.55
31 Jan 20229.31%−0.86
14 Jan 202210.17%+1.68
31 Dec 20218.49%+0.20
15 Dec 20218.29%−0.31
30 Nov 20218.60%+0.11
15 Nov 20218.49%−0.52
29 Oct 20219.01%−1.29
15 Oct 202110.30%−0.45
30 Sep 202110.75%−0.89
15 Sep 202111.64%−0.08
31 Aug 202111.72%+0.34
13 Aug 202111.38%+0.21
30 Jul 202111.17%+0.56
15 Jul 202110.61%−0.19
30 Jun 202110.80%−0.34
15 Jun 202111.14%−0.85
28 May 202111.99%−0.89
14 May 202112.88%−0.09
30 Apr 202112.97%0.00
15 Apr 202112.97%+0.12
31 Mar 202112.85%+2.76
15 Mar 202110.09%+0.08
26 Feb 202110.01%+0.24
12 Feb 20219.77%+0.41
29 Jan 20219.36%+0.27
15 Jan 20219.09%−0.54
31 Dec 20209.63%+1.77
15 Dec 20207.86%−0.60
30 Nov 20208.46%−0.43
13 Nov 20208.89%+0.51
30 Oct 20208.38%+0.66
15 Oct 20207.72%−1.23
30 Sep 20208.95%−0.01
15 Sep 20208.96%+0.48
31 Aug 20208.48%−0.63
14 Aug 20209.11%+0.03
31 Jul 20209.08%+0.58
15 Jul 20208.50%–

Newest first. Scroll inside the table for earlier dates, back to 15 Jul 2020.

Frequently asked questions

How shorted is Black Diamond Therapeutics, Inc. right now?
8.96% of Black Diamond Therapeutics, Inc.'s (BDTX) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 828th 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 BDTX'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 BDTX's days to cover?
10.13 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.