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HowShorted

How shorted is Syndax Pharmaceuticals Inc? SNDX

#67most shorted US stockof 3,805 ranked stocks, more shorted than 98%

23.14%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
−1.14
5 reports (~10 weeks)
−1.48
days to cover
14.73
Aggregate net short position time series for Syndax 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 Syndax 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
4 Aug 202625.38% 31 Jul 202625.65% 14 Aug 2026+0.27
30 Apr 202624.12% 15 Apr 202624.50% 15 May 2026+0.38
26 Feb 202625.45% 13 Feb 202625.08% 27 Feb 2026−0.37
12 Jan 202625.97% 31 Dec 202525.71% 15 Jan 2026−0.26
3 Nov 202529.16% 31 Oct 202529.48% 14 Nov 2025+0.32
4 Aug 202527.78% 31 Jul 202523.92% 15 Aug 2025−3.86
5 May 202524.88% 15 Apr 202525.26% 15 May 2025+0.38
3 Mar 202522.57% 28 Feb 202522.12% 14 Mar 2025−0.45

Fails to deliver

The SEC's fails-to-deliver figure for SNDX: 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
466
25 Aug 2026
Highest in window
270,061
27 Oct 2025
Days with a balance
47
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Syndax 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 270K 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 202623.14%−1.14
31 Aug 202624.28%−1.37
14 Aug 202625.65%+0.27
31 Jul 202625.38%+1.89
15 Jul 202623.49%−1.13
30 Jun 202624.62%+2.21
15 Jun 202622.41%+3.63
29 May 202618.78%−5.72
15 May 202624.50%+2.03
30 Apr 202622.47%−1.65
15 Apr 202624.12%+0.31
31 Mar 202623.81%+0.24
13 Mar 202623.57%−1.51
27 Feb 202625.08%−0.37
13 Feb 202625.45%+1.12
30 Jan 202624.33%−1.38
15 Jan 202625.71%−0.26
31 Dec 202525.97%−0.29
15 Dec 202526.26%−2.76
28 Nov 202529.02%−0.46
14 Nov 202529.48%+0.32
31 Oct 202529.16%+3.59
15 Oct 202525.57%−0.91
30 Sep 202526.48%−0.38
15 Sep 202526.86%+2.58
29 Aug 202524.28%+0.36
15 Aug 202523.92%−3.86
31 Jul 202527.78%+0.25
15 Jul 202527.53%−0.21
30 Jun 202527.74%+2.17
13 Jun 202525.57%−1.32
30 May 202526.89%+1.63
15 May 202525.26%+0.38
15 Apr 202524.88%+2.13
31 Mar 202522.75%+0.63
14 Mar 202522.12%−0.45
28 Feb 202522.57%−2.76
14 Feb 202525.33%−0.76
31 Jan 202526.09%−0.21
15 Jan 202526.30%+1.25
31 Dec 202425.05%+5.82
13 Dec 202419.23%+2.31
29 Nov 202416.92%+4.46
15 Nov 202412.46%−0.06
31 Oct 202412.52%+0.17
15 Oct 202412.35%+0.50
30 Sep 202411.85%+0.49
13 Sep 202411.36%+0.20
30 Aug 202411.16%+0.07
15 Aug 202411.09%+1.00
31 Jul 202410.09%+0.06
15 Jul 202410.03%+0.21
28 Jun 20249.82%−1.85
14 Jun 202411.67%+0.32
31 May 202411.35%−0.45
15 May 202411.80%−2.72
30 Apr 202414.52%+0.73
15 Apr 202413.79%−0.02
28 Mar 202413.81%+1.85
15 Mar 202411.96%−1.09
29 Feb 202413.05%+0.70
15 Feb 202412.35%−0.12
31 Jan 202412.47%0.00
12 Jan 202412.47%+0.43
29 Dec 202312.04%−2.80
15 Dec 202314.84%+0.15
30 Nov 202314.69%−0.56
15 Nov 202315.25%+0.92
31 Oct 202314.33%+2.10
13 Oct 202312.23%+1.31
29 Sep 202310.92%−0.01
15 Sep 202310.93%+0.92
31 Aug 202310.01%−0.30
15 Aug 202310.31%+0.74
31 Jul 20239.57%+0.95
14 Jul 20238.62%+0.27
30 Jun 20238.35%+0.21
15 Jun 20238.14%−0.90
31 May 20239.04%−0.24
15 May 20239.28%−1.55
28 Apr 202310.83%−0.59
14 Apr 202311.42%−1.25
31 Mar 202312.67%+1.40
15 Mar 202311.27%+1.32
28 Feb 20239.95%+0.79
15 Feb 20239.16%+0.04
31 Jan 20239.12%+0.06
13 Jan 20239.06%−1.52
30 Dec 202210.58%+1.94
15 Dec 20228.64%+1.30
30 Nov 20227.34%+0.40
15 Nov 20226.94%−0.25
31 Oct 20227.19%−0.72
14 Oct 20227.91%+0.06
30 Sep 20227.85%−0.28
15 Sep 20228.13%0.00
31 Aug 20228.13%+0.04
15 Aug 20228.09%+0.17
29 Jul 20227.92%+0.20
15 Jul 20227.72%−2.55
30 Jun 202210.27%−0.45
15 Jun 202210.72%−0.08
31 May 202210.80%−0.74
13 May 202211.54%−0.19
29 Apr 202211.73%+0.66
14 Apr 202211.07%+0.93
31 Mar 202210.14%−1.07
15 Mar 202211.21%+1.77
28 Feb 20229.44%−0.53
15 Feb 20229.97%+1.45
31 Jan 20228.52%+1.72
14 Jan 20226.80%−0.01
31 Dec 20216.81%−0.38
15 Dec 20217.19%+0.76
30 Nov 20216.43%−0.46
15 Nov 20216.89%−6.00
29 Oct 202112.89%−0.12
15 Oct 202113.01%−1.31
30 Sep 202114.32%−1.76
15 Sep 202116.08%−0.88
31 Aug 202116.96%+0.45
13 Aug 202116.51%−0.46
30 Jul 202116.97%−0.93
15 Jul 202117.90%+1.62
30 Jun 202116.28%+0.28
15 Jun 202116.00%+0.39
28 May 202115.61%+0.57
14 May 202115.04%−0.18
30 Apr 202115.22%+2.14
15 Apr 202113.08%−1.01
31 Mar 202114.09%+3.08
15 Mar 202111.01%−1.05
26 Feb 202112.06%−0.01
12 Feb 202112.07%+0.25
29 Jan 202111.82%−1.33
15 Jan 202113.15%−0.35
31 Dec 202013.50%+1.82
15 Dec 202011.68%+0.60
30 Nov 202011.08%−0.18
13 Nov 202011.26%−0.10
30 Oct 202011.36%−0.57
15 Oct 202011.93%+0.27
30 Sep 202011.66%+2.18
15 Sep 20209.48%+0.17
31 Aug 20209.31%+0.11
14 Aug 20209.20%−2.10
31 Jul 202011.30%−0.56
15 Jul 202011.86%−0.77
30 Jun 202012.63%+1.99
15 Jun 202010.64%+1.08
29 May 20209.56%+2.13
15 May 20207.43%+1.60
30 Apr 20205.83%−0.03
15 Apr 20205.86%−0.08
31 Mar 20205.94%+1.95
13 Mar 20203.99%+0.69
28 Feb 20203.30%+0.20
14 Feb 20203.10%+0.55
31 Jan 20202.55%+0.30
15 Jan 20202.25%–

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

Frequently asked questions

How shorted is Syndax Pharmaceuticals Inc right now?
23.14% of Syndax Pharmaceuticals Inc's (SNDX) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 67th 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 SNDX'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 SNDX's days to cover?
14.73 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.