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HowShorted

How shorted is Zentalis Pharmaceuticals, Inc.? ZNTL

#1,227most shorted US stockof 3,805 ranked stocks, more shorted than 67%

6.68%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
−0.28
5 reports (~10 weeks)
−1.59
days to cover
5.24
Aggregate net short position time series for Zentalis Pharmaceuticals, 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 Zentalis Pharmaceuticals, 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 20267.86% 31 Jul 20268.33% 14 Aug 2026+0.47
12 May 20267.74% 30 Apr 20266.94% 15 May 2026−0.80
26 Mar 20265.77% 13 Mar 20266.01% 31 Mar 2026+0.24
10 Nov 20256.92% 31 Oct 20257.04% 14 Nov 2025+0.12
6 Aug 20256.56% 31 Jul 20256.19% 15 Aug 2025−0.37
14 May 20258.11% 30 Apr 20258.59% 15 May 2025+0.48
26 Mar 20257.47% 14 Mar 20256.64% 31 Mar 2025−0.83
9 Aug 202415.93% 31 Jul 202416.27% 15 Aug 2024+0.34

Fails to deliver

The SEC's fails-to-deliver figure for ZNTL: 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
1,398
4 Sep 2026
Highest in window
362,052
29 Jun 2026
Days with a balance
20
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Zentalis Pharmaceuticals, 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 362K shares.

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Sector: Healthcare · By year: 2020 · 2021 · 2022 · 2023 · 2024 · 2025 · 2026

History

Full reported short interest history
Settlement dateShort %Change
15 Sep 20266.68%−0.28
31 Aug 20266.96%−1.37
14 Aug 20268.33%+0.47
31 Jul 20267.86%−0.81
15 Jul 20268.67%+0.40
30 Jun 20268.27%+1.25
15 Jun 20267.02%−0.06
29 May 20267.08%+0.14
15 May 20266.94%−0.80
30 Apr 20267.74%+0.40
15 Apr 20267.34%+1.33
31 Mar 20266.01%+0.24
13 Mar 20265.77%+0.54
27 Feb 20265.23%0.00
13 Feb 20265.23%−0.34
30 Jan 20265.57%−1.12
15 Jan 20266.69%+1.00
31 Dec 20255.69%−1.92
15 Dec 20257.61%+0.51
28 Nov 20257.10%+0.06
14 Nov 20257.04%+0.12
31 Oct 20256.92%+0.08
15 Oct 20256.84%+0.72
30 Sep 20256.12%−0.18
15 Sep 20256.30%+0.08
29 Aug 20256.22%+0.03
15 Aug 20256.19%−0.37
31 Jul 20256.56%−0.08
15 Jul 20256.64%−0.42
30 Jun 20257.06%−0.87
13 Jun 20257.93%−0.26
30 May 20258.19%−0.40
15 May 20258.59%+0.48
30 Apr 20258.11%+0.78
15 Apr 20257.33%+0.69
31 Mar 20256.64%−0.83
14 Mar 20257.47%+0.21
28 Feb 20257.26%−0.02
14 Feb 20257.28%+0.48
31 Jan 20256.80%−0.32
15 Jan 20257.12%+0.74
31 Dec 20246.38%−1.34
13 Dec 20247.72%+1.17
29 Nov 20246.55%−0.42
15 Nov 20246.97%−2.95
31 Oct 20249.92%−0.85
15 Oct 202410.77%−1.38
30 Sep 202412.15%−4.30
13 Sep 202416.45%−0.82
30 Aug 202417.27%+1.00
15 Aug 202416.27%+0.34
31 Jul 202415.93%+1.25
15 Jul 202414.68%+1.13
28 Jun 202413.55%−11.58
14 Jun 202425.13%+0.47
31 May 202424.66%−1.44
15 May 202426.10%+1.37
30 Apr 202424.73%+1.22
15 Apr 202423.51%+1.57
28 Mar 202421.94%−1.71
15 Mar 202423.65%+3.07
29 Feb 202420.58%+0.33
15 Feb 202420.25%+0.93
31 Jan 202419.32%+0.85
12 Jan 202418.47%+0.46
29 Dec 202318.01%+1.63
15 Dec 202316.38%+0.70
30 Nov 202315.68%+0.73
15 Nov 202314.95%−0.83
31 Oct 202315.78%+0.62
13 Oct 202315.16%−0.81
29 Sep 202315.97%−0.03
15 Sep 202316.00%−1.00
31 Aug 202317.00%−0.54
15 Aug 202317.54%−4.88
31 Jul 202322.42%−0.67
14 Jul 202323.09%−1.32
30 Jun 202324.41%+2.08
15 Jun 202322.33%+1.63
31 May 202320.70%+2.82
15 May 202317.88%+1.33
28 Apr 202316.55%+1.39
14 Apr 202315.16%+0.19
31 Mar 202314.97%+1.38
15 Mar 202313.59%+0.12
28 Feb 202313.47%−0.39
15 Feb 202313.86%+0.70
31 Jan 202313.16%−0.63
13 Jan 202313.79%+2.63
30 Dec 202211.16%+1.41
15 Dec 20229.75%−0.85
30 Nov 202210.60%+0.47
15 Nov 202210.13%−0.33
31 Oct 202210.46%+0.15
14 Oct 202210.31%−0.22
30 Sep 202210.53%−0.13
15 Sep 202210.66%+0.05
31 Aug 202210.61%+0.39
15 Aug 202210.22%−3.32
29 Jul 202213.54%−1.08
15 Jul 202214.62%−0.51
30 Jun 202215.13%+1.68
15 Jun 202213.45%+1.95
31 May 202211.50%+1.40
13 May 202210.10%+0.56
29 Apr 20229.54%−1.09
14 Apr 202210.63%+0.04
31 Mar 202210.59%+1.71
15 Mar 20228.88%+0.24
28 Feb 20228.64%+0.60
15 Feb 20228.04%+1.02
31 Jan 20227.02%+0.08
14 Jan 20226.94%−0.65
31 Dec 20217.59%−0.15
15 Dec 20217.74%+0.83
30 Nov 20216.91%+0.42
15 Nov 20216.49%+0.15
29 Oct 20216.34%+0.30
15 Oct 20216.04%+0.51
30 Sep 20215.53%+0.41
15 Sep 20215.12%+0.13
31 Aug 20214.99%−0.17
13 Aug 20215.16%−0.59
30 Jul 20215.75%+0.19
15 Jul 20215.56%−0.17
30 Jun 20215.73%−0.12
15 Jun 20215.85%−0.18
28 May 20216.03%−0.13
14 May 20216.16%+0.72
30 Apr 20215.44%−2.28
15 Apr 20217.72%−0.42
31 Mar 20218.14%+1.42
15 Mar 20216.72%−0.07
26 Feb 20216.79%+1.31
12 Feb 20215.48%−1.00
29 Jan 20216.48%−0.10
15 Jan 20216.58%−0.82
31 Dec 20207.40%+2.73
15 Dec 20204.67%−0.24
30 Nov 20204.91%−0.37
13 Nov 20205.28%−0.50
30 Oct 20205.78%+0.49
15 Oct 20205.29%+0.03
30 Sep 20205.26%+0.65
15 Sep 20204.61%−1.31
31 Aug 20205.92%−0.19
14 Aug 20206.11%−0.60
31 Jul 20206.71%+0.33
15 Jul 20206.38%–

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

Frequently asked questions

How shorted is Zentalis Pharmaceuticals, Inc. right now?
6.68% of Zentalis Pharmaceuticals, Inc.'s (ZNTL) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 1,227th 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 ZNTL'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 ZNTL's days to cover?
5.24 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.