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HowShorted

How shorted is Natera, Inc.? NTRA

#2,341most shorted US stockof 3,805 ranked stocks, more shorted than 38%

3.33%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
−0.50
5 reports (~10 weeks)
−0.73
days to cover
4.70
Aggregate net short position time series for Natera, 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 Natera, 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 20263.03% 31 Jul 20262.98% 14 Aug 2026−0.05
7 May 20262.92% 30 Apr 20262.64% 15 May 2026−0.28
26 Feb 20262.38% 13 Feb 20262.17% 27 Feb 2026−0.21
12 Jan 20263.44% 31 Dec 20252.50% 15 Jan 2026−0.94
6 Nov 20252.83% 31 Oct 20252.72% 14 Nov 2025−0.11
7 Aug 20252.91% 31 Jul 20253.04% 15 Aug 2025+0.13
8 May 20254.46% 30 Apr 20254.33% 15 May 2025−0.13
27 Feb 20251.89% 14 Feb 20252.18% 28 Feb 2025+0.29

Fails to deliver

The SEC's fails-to-deliver figure for NTRA: 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
2
8 Sep 2026
Highest in window
83,324
31 Mar 2026
Days with a balance
63
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Natera, 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 83K shares.

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Sector: Healthcare

History

Full reported short interest history
Settlement dateShort %Change
15 Sep 20263.33%−0.50
31 Aug 20263.83%+0.85
14 Aug 20262.98%−0.05
31 Jul 20263.03%−0.44
15 Jul 20263.47%−0.59
30 Jun 20264.06%+1.05
15 Jun 20263.01%+0.49
29 May 20262.52%−0.12
15 May 20262.64%−0.28
30 Apr 20262.92%+0.19
15 Apr 20262.73%−0.80
31 Mar 20263.53%+1.13
13 Mar 20262.40%+0.23
27 Feb 20262.17%−0.21
13 Feb 20262.38%−0.09
30 Jan 20262.47%−0.03
15 Jan 20262.50%−0.94
31 Dec 20253.44%+0.98
15 Dec 20252.46%−0.45
28 Nov 20252.91%+0.19
14 Nov 20252.72%−0.11
31 Oct 20252.83%+0.01
15 Oct 20252.82%−1.15
30 Sep 20253.97%+1.21
15 Sep 20252.76%+0.06
29 Aug 20252.70%−0.34
15 Aug 20253.04%+0.13
31 Jul 20252.91%+0.19
15 Jul 20252.72%−1.92
30 Jun 20254.64%+0.07
13 Jun 20254.57%+0.17
30 May 20254.40%+0.07
15 May 20254.33%−0.13
30 Apr 20254.46%−0.09
15 Apr 20254.55%+0.32
31 Mar 20254.23%+1.32
14 Mar 20252.91%+0.73
28 Feb 20252.18%+0.29
14 Feb 20251.89%−1.49
31 Jan 20253.38%+0.17
15 Jan 20253.21%−0.06
31 Dec 20243.27%+0.21
13 Dec 20243.06%+0.02
29 Nov 20243.04%+0.21
15 Nov 20242.83%−0.18
31 Oct 20243.01%−0.05
15 Oct 20243.06%−2.89
30 Sep 20245.95%−0.18
13 Sep 20246.13%+0.14
30 Aug 20245.99%−0.17
15 Aug 20246.16%−0.72
31 Jul 20246.88%+1.86
15 Jul 20245.02%−0.18
28 Jun 20245.20%+0.68
14 Jun 20244.52%−0.12
31 May 20244.64%−0.09
15 May 20244.73%−0.40
30 Apr 20245.13%+0.34
15 Apr 20244.79%−0.41
28 Mar 20245.20%−1.42
15 Mar 20246.62%−0.49
29 Feb 20247.11%+0.60
15 Feb 20246.51%−0.02
31 Jan 20246.53%+0.78
12 Jan 20245.75%+0.36
29 Dec 20235.39%−0.18
15 Dec 20235.57%−0.32
30 Nov 20235.89%−0.24
15 Nov 20236.13%+0.31
31 Oct 20235.82%+0.23
13 Oct 20235.59%−0.60
29 Sep 20236.19%+0.06
15 Sep 20236.13%+0.29
31 Aug 20235.84%−0.10
15 Aug 20235.94%−0.20
31 Jul 20236.14%−0.37
14 Jul 20236.51%−0.14
30 Jun 20236.65%+0.43
15 Jun 20236.22%+0.35
31 May 20235.87%−0.03
15 May 20235.90%+0.01
28 Apr 20235.89%+0.57
14 Apr 20235.32%−0.15
31 Mar 20235.47%−0.72
15 Mar 20236.19%−0.97
28 Feb 20237.16%−0.17
15 Feb 20237.33%−0.51
31 Jan 20237.84%+1.37
13 Jan 20236.47%+0.97
30 Dec 20225.50%−0.02
15 Dec 20225.52%−0.24
30 Nov 20225.76%+0.63
15 Nov 20225.13%−0.80
31 Oct 20225.93%−0.11
14 Oct 20226.04%+0.27
30 Sep 20225.77%+0.21
15 Sep 20225.56%−0.47
31 Aug 20226.03%−0.24
15 Aug 20226.27%+0.26
29 Jul 20226.01%−0.32
15 Jul 20226.33%−0.35
30 Jun 20226.68%−0.73
15 Jun 20227.41%+0.07
31 May 20227.34%−1.28
13 May 20228.62%−0.21
29 Apr 20228.83%+0.74
14 Apr 20228.09%+0.01
31 Mar 20228.08%+2.77
15 Mar 20225.31%−0.48
28 Feb 20225.79%0.00
15 Feb 20225.79%−0.12
31 Jan 20225.91%+0.92
14 Jan 20224.99%−0.59
31 Dec 20215.58%+0.22
15 Dec 20215.36%−0.12
30 Nov 20215.48%+0.15
15 Nov 20215.33%−0.26
29 Oct 20215.59%−0.25
15 Oct 20215.84%−0.05
30 Sep 20215.89%−0.09
15 Sep 20215.98%−0.25
31 Aug 20216.23%−0.15
13 Aug 20216.38%−0.67
30 Jul 20217.05%−0.13
15 Jul 20217.18%+0.43
30 Jun 20216.75%−1.06
15 Jun 20217.81%+0.18
28 May 20217.63%+0.28
14 May 20217.35%+0.29
30 Apr 20217.06%+0.77
15 Apr 20216.29%−0.37
31 Mar 20216.66%+0.05
15 Mar 20216.61%+0.25
26 Feb 20216.36%+0.66
12 Feb 20215.70%+0.01
29 Jan 20215.69%−0.19
15 Jan 20215.88%−0.04
31 Dec 20205.92%−0.02
15 Dec 20205.94%+0.63
30 Nov 20205.31%−0.37
13 Nov 20205.68%−0.44
30 Oct 20206.12%−0.11
15 Oct 20206.23%−0.30
30 Sep 20206.53%−0.81
15 Sep 20207.34%+0.50
31 Aug 20206.84%−0.20
14 Aug 20207.04%−0.63
31 Jul 20207.67%−0.12
15 Jul 20207.79%+0.35
30 Jun 20207.44%+1.04
15 Jun 20206.40%+0.18
29 May 20206.22%−0.08
15 May 20206.30%−1.17
30 Apr 20207.47%−0.63
15 Apr 20208.10%+1.49
31 Mar 20206.61%+1.26
13 Mar 20205.35%+0.85
28 Feb 20204.50%+0.26
14 Feb 20204.24%−0.41
31 Jan 20204.65%−0.49
15 Jan 20205.14%+0.44
31 Dec 20194.70%+1.10
13 Dec 20193.60%−0.16
29 Nov 20193.76%−0.49
15 Nov 20194.25%+0.05
31 Oct 20194.20%+0.18
15 Oct 20194.02%−0.57
30 Sep 20194.59%+0.67
13 Sep 20193.92%+0.02
30 Aug 20193.90%+0.01
15 Aug 20193.89%−0.52
31 Jul 20194.41%−2.39
15 Jul 20196.80%+1.59
28 Jun 20195.21%+1.20
14 Jun 20194.01%+0.53
31 May 20193.48%−0.46
15 May 20193.94%−0.01
30 Apr 20193.95%+0.82
15 Apr 20193.13%+0.42
29 Mar 20192.71%−0.92
15 Mar 20193.63%+0.03
28 Feb 20193.60%−0.27
15 Feb 20193.87%+0.49
31 Jan 20193.38%+0.23
15 Jan 20193.15%−0.06
31 Dec 20183.21%+0.18
14 Dec 20183.03%−0.17
30 Nov 20183.20%+0.32
15 Nov 20182.88%−0.86
31 Oct 20183.74%+0.18
15 Oct 20183.56%+0.58
28 Sep 20182.98%+1.34
14 Sep 20181.64%+0.16
31 Aug 20181.48%−0.28
15 Aug 20181.76%−0.72
31 Jul 20182.48%−0.51
13 Jul 20182.99%+0.92
29 Jun 20182.07%+0.02
15 Jun 20182.05%+0.02
31 May 20182.03%−0.01
15 May 20182.04%−0.12
30 Apr 20182.16%+0.02
13 Apr 20182.14%−0.12
29 Mar 20182.26%−0.31
15 Mar 20182.57%−0.14
28 Feb 20182.71%−0.16
15 Feb 20182.87%+0.14
31 Jan 20182.73%−0.01
12 Jan 20182.74%+0.16
29 Dec 20172.58%–

Newest first. Scroll inside the table for earlier dates, back to 29 Dec 2017.

Frequently asked questions

How shorted is Natera, Inc. right now?
3.33% of Natera, Inc.'s (NTRA) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 2,341st 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 NTRA'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 NTRA's days to cover?
4.70 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.