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HowShorted

How shorted is Twist Bioscience Corp? TWST

#122most shorted US stockof 3,805 ranked stocks, more shorted than 96%

19.94%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
+0.70
5 reports (~10 weeks)
−2.46
days to cover
8.92
Aggregate net short position time series for Twist Bioscience Corp

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 Twist Bioscience Corp 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
3 Aug 202622.45% 31 Jul 202622.50% 14 Aug 2026+0.05
4 May 202622.35% 30 Apr 202626.62% 15 May 2026+4.27
2 Feb 202619.85% 30 Jan 202621.21% 13 Feb 2026+1.36
12 Jan 202623.32% 31 Dec 202520.45% 15 Jan 2026−2.87
14 Nov 202517.48% 31 Oct 202520.86% 28 Nov 2025+3.38
4 Aug 202517.29% 31 Jul 202518.24% 15 Aug 2025+0.95
5 May 202516.70% 30 Apr 202517.72% 15 May 2025+1.02
3 Feb 202514.48% 31 Jan 202515.45% 14 Feb 2025+0.97

Fails to deliver

The SEC's fails-to-deliver figure for TWST: 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
1,028
14 Sep 2026
Highest in window
371,330
23 Feb 2026
Days with a balance
101
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Twist Bioscience Corp 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 371K 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 202619.94%+0.70
31 Aug 202619.24%−3.26
14 Aug 202622.50%+0.05
31 Jul 202622.45%−0.22
15 Jul 202622.67%+0.27
30 Jun 202622.40%−5.96
15 Jun 202628.36%+4.43
29 May 202623.93%−2.69
15 May 202626.62%+4.27
30 Apr 202622.35%−1.34
15 Apr 202623.69%+0.61
31 Mar 202623.08%+2.10
13 Mar 202620.98%+0.22
27 Feb 202620.76%−0.45
13 Feb 202621.21%+1.36
30 Jan 202619.85%−0.60
15 Jan 202620.45%−2.87
31 Dec 202523.32%+0.85
15 Dec 202522.47%+1.61
28 Nov 202520.86%+3.04
14 Nov 202517.82%+0.34
31 Oct 202517.48%−0.51
15 Oct 202517.99%−3.52
30 Sep 202521.51%+0.28
15 Sep 202521.23%+4.27
29 Aug 202516.96%−1.28
15 Aug 202518.24%+0.95
31 Jul 202517.29%−0.64
15 Jul 202517.93%−0.48
30 Jun 202518.41%+1.20
13 Jun 202517.21%−0.62
30 May 202517.83%+0.11
15 May 202517.72%+1.02
30 Apr 202516.70%+0.39
15 Apr 202516.31%+0.23
31 Mar 202516.08%+1.28
14 Mar 202514.80%−0.79
28 Feb 202515.59%+0.14
14 Feb 202515.45%+0.97
31 Jan 202514.48%−0.98
15 Jan 202515.46%+0.81
31 Dec 202414.65%−0.43
13 Dec 202415.08%−1.17
29 Nov 202416.25%+1.51
15 Nov 202414.74%−0.66
31 Oct 202415.40%+0.33
15 Oct 202415.07%+0.22
30 Sep 202414.85%−0.41
13 Sep 202415.26%−0.76
30 Aug 202416.02%+0.30
15 Aug 202415.72%−1.12
31 Jul 202416.84%+0.47
15 Jul 202416.37%−0.07
28 Jun 202416.44%−2.19
14 Jun 202418.63%−0.42
31 May 202419.05%+0.67
15 May 202418.38%−2.11
30 Apr 202420.49%−0.70
15 Apr 202421.19%−0.01
28 Mar 202421.20%+0.42
15 Mar 202420.78%−0.66
29 Feb 202421.44%+0.06
15 Feb 202421.38%+0.06
31 Jan 202421.32%−0.56
12 Jan 202421.88%+1.64
29 Dec 202320.24%−5.01
15 Dec 202325.25%−1.59
30 Nov 202326.84%+0.66
15 Nov 202326.18%+0.12
31 Oct 202326.06%−0.79
13 Oct 202326.85%+2.99
29 Sep 202323.86%−0.49
15 Sep 202324.35%−0.35
31 Aug 202324.70%+0.86
15 Aug 202323.84%+0.36
31 Jul 202323.48%−1.60
14 Jul 202325.08%−0.78
30 Jun 202325.86%+0.23
15 Jun 202325.63%−0.09
31 May 202325.72%+1.51
15 May 202324.21%+2.46
28 Apr 202321.75%+0.49
14 Apr 202321.26%+0.30
31 Mar 202320.96%+1.51
15 Mar 202319.45%+1.85
28 Feb 202317.60%+0.99
15 Feb 202316.61%+0.34
31 Jan 202316.27%+0.17
13 Jan 202316.10%+0.60
30 Dec 202215.50%+0.95
15 Dec 202214.55%+0.53
30 Nov 202214.02%+3.23
15 Nov 202210.79%−0.02
31 Oct 202210.81%+0.75
14 Oct 202210.06%−0.12
30 Sep 202210.18%−0.89
15 Sep 202211.07%+0.46
31 Aug 202210.61%+0.59
15 Aug 202210.02%−0.76
29 Jul 202210.78%−1.06
15 Jul 202211.84%+0.50
30 Jun 202211.34%+0.21
15 Jun 202211.13%+0.15
31 May 202210.98%−3.86
13 May 202214.84%+0.48
29 Apr 202214.36%+1.13
14 Apr 202213.23%+0.63
31 Mar 202212.60%+0.52
15 Mar 202212.08%+0.38
28 Feb 202211.70%+1.05
15 Feb 202210.65%−0.40
31 Jan 202211.05%+0.95
14 Jan 202210.10%+0.18
31 Dec 20219.92%−0.07
15 Dec 20219.99%+1.81
30 Nov 20218.18%+1.76
15 Nov 20216.42%−0.47
29 Oct 20216.89%−0.62
15 Oct 20217.51%+0.73
30 Sep 20216.78%−0.05
15 Sep 20216.83%−0.11
31 Aug 20216.94%+0.06
13 Aug 20216.88%+0.48
30 Jul 20216.40%0.00
15 Jul 20216.40%−0.28
30 Jun 20216.68%−0.78
15 Jun 20217.46%−0.08
28 May 20217.54%−0.55
14 May 20218.09%+0.88
30 Apr 20217.21%−0.52
15 Apr 20217.73%−0.68
31 Mar 20218.41%+1.05
15 Mar 20217.36%+2.09
26 Feb 20215.27%+1.15
12 Feb 20214.12%−0.01
29 Jan 20214.13%−1.19
15 Jan 20215.32%−0.31
31 Dec 20205.63%−0.90
15 Dec 20206.53%−1.63
30 Nov 20208.16%−0.93
13 Nov 20209.09%+0.21
30 Oct 20208.88%−0.70
15 Oct 20209.58%−0.16
30 Sep 20209.74%−0.15
15 Sep 20209.89%+0.48
31 Aug 20209.41%−1.33
14 Aug 202010.74%−1.00
31 Jul 202011.74%−0.23
15 Jul 202011.97%+0.20
30 Jun 202011.77%+1.49
15 Jun 202010.28%−0.25
29 May 202010.53%+0.15
15 May 202010.38%−2.35
30 Apr 202012.73%−0.55
15 Apr 202013.28%–

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

Frequently asked questions

How shorted is Twist Bioscience Corp right now?
19.94% of Twist Bioscience Corp's (TWST) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 122nd 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 TWST'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 TWST's days to cover?
8.92 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.