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Stock research / United States / NTRA / Short interest

Natera, Inc. short interest

5.9M shares of Natera were sold short at the 15 October 2026 settlement, near the top of its range over the last year (3.0M to 6.4M). Short sellers would need 3.4 days of normal trading to buy them back.

Shares sold short5.9Mat 15 Oct 2026
Change on the settlement before-7.9%+51% over a year
Days to cover3.43at 1.7M shares a day
Of shares in issue4.07%shares short over shares outstanding
New to this? How to read this page
  1. Short interest is the number of shares investors have borrowed and sold, betting the price will fall, and not yet bought back.
  2. Days to cover is shares short over an average day's trading: how many days it would take short sellers to buy them all back. Above 5 or so is high.
  3. Rising short interest says more investors are betting against the stock. A crowded short can also rise fast if shorts rush to buy back.
  4. Brokers report it twice a month to FINRA, about ten days after each settlement date.
  5. What is short interest?

Short interest, days to cover and the price

Short interest is near the top of its range over the last year (3.0M to 6.4M), and the share price moved +129% over the last year.

Shares sold shortDays to coverShare price

Three charts on one timeline. Top: shares sold short at each settlement. Middle: days to cover, taller meaning shorts would need longer to buy back. Bottom: the share price, so you can see whether shorts added as the price fell or rose.

How it compares

every company on the site

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    Every settlement since 29 Dec 2017 as a table
    SettlementShares shortChangeAverage daily volumeDays to cover
    15 October 20265.9M-7.9%1.7M3.43
    30 September 20266.4M+32.5%2.0M3.20
    15 September 20264.8M-13.0%1.0M4.70
    31 August 20265.5M+28.4%1.3M4.37
    14 August 20264.3M-1.6%1.6M2.61
    31 July 20264.4M-12.1%932K4.69
    15 July 20265.0M-14.7%1.4M3.61
    30 June 20265.8M+34.9%2.1M2.75
    15 June 20264.3M+19.4%1.1M4.00
    29 May 20263.6M-4.5%1.6M2.23
    15 May 20263.8M-6.0%1.9M2.01
    30 April 20264.0M+6.7%1.2M3.31
    15 April 20263.8M-22.5%1.4M2.72
    31 March 20264.9M+47.2%1.2M4.13
    13 March 20263.3M+10.6%1.3M2.52
    27 February 20263.0M-8.8%1.0M2.85
    13 February 20263.3M-3.7%1.3M2.60
    30 January 20263.4M-1.5%986K3.45
    15 January 20263.5M-27.2%1.2M2.81
    31 December 20254.7M+39.8%1.0M4.63
    15 December 20253.4M-15.5%1.2M2.80
    28 November 20254.0M+7.0%2.0M2.06
    14 November 20253.8M-3.9%1.6M2.33
    31 October 20253.9M+1.1%1.2M3.38
    15 October 20253.9M-29.1%1.1M3.48
    30 September 20255.5M+43.7%1.2M4.65
    15 September 20253.8M+2.3%947K4.00
    29 August 20253.7M-11.1%1.0M3.70
    15 August 20254.2M+5.1%1.9M2.18
    31 July 20254.0M+6.9%1.4M2.86
    15 July 20253.7M-41.4%1.0M3.71
    30 June 20256.3M+1.7%1.5M4.18
    13 June 20256.2M+3.9%1.1M5.86
    30 May 20256.0M+1.7%1.3M4.71
    15 May 20255.9M+0.3%1.6M3.64
    30 April 20255.9M-2.0%802K7.34
    15 April 20256.0M+7.6%1.8M3.40
    31 March 20255.6M+45.1%1.5M3.78
    14 March 20253.8M+33.7%2.4M1.63
    28 February 20252.9M+15.6%2.5M1.15
    14 February 20252.5M-44.2%1.2M2.11
    31 January 20254.5M+5.4%1.5M3.01
    15 January 20254.2M-1.9%1.3M3.32
    31 December 20244.3M+6.8%1.1M3.84
    13 December 20244.0M+0.5%1.0M4.00
    29 November 20244.0M+7.6%1.4M2.78
    15 November 20243.7M+0.3%1.8M2.12
    31 October 20243.7M-1.5%798K4.66
    15 October 20243.8M-48.6%1.1M3.48
    30 September 20247.4M-2.9%1.1M6.55
    13 September 20247.6M+2.4%1.1M6.92
    30 August 20247.4M-2.8%1.2M6.16
    15 August 20247.6M-9.8%1.5M4.92
    31 July 20248.4M+36.9%2.2M3.84
    15 July 20246.2M-3.3%958K6.44
    28 June 20246.4M+15.0%1.2M5.14
    14 June 20245.5M-2.6%913K6.08
    31 May 20245.7M-2.0%879K6.48
    15 May 20245.8M-5.8%1.5M3.93
    30 April 20246.2M+7.2%1.1M5.51
    15 April 20245.8M-7.9%1.2M4.72
    28 March 20246.2M-21.4%1.6M3.85
    15 March 20248.0M-7.0%1.6M4.93
    29 February 20248.5M+9.2%1.6M5.20
    15 February 20247.8M-0.2%1.1M7.12
    31 January 20247.8M+13.6%1.6M4.84
    12 January 20246.9M+6.6%1.5M4.68
    29 December 20236.5M-3.3%1.2M5.51
    15 December 20236.7M-5.4%1.6M4.09
    30 November 20237.1M-3.8%1.0M7.01
    15 November 20237.4M+10.3%1.6M4.65
    31 October 20236.7M+4.1%948K7.04
    13 October 20236.4M-9.7%1.5M4.18
    29 September 20237.1M+1.0%1.2M5.79
    15 September 20237.0M+5.0%1.4M4.90
    31 August 20236.7M-1.7%748K8.96
    15 August 20236.8M-2.9%1.5M4.42
    31 July 20237.0M-5.7%721K9.74
    14 July 20237.4M-2.1%774K9.62
    30 June 20237.6M+6.9%1.3M6.00
    15 June 20237.1M+5.9%976K7.28
    31 May 20236.7M-0.4%909K7.38
    15 May 20236.7M+17.3%1.2M5.61
    28 April 20235.7M+10.7%971K5.92
    14 April 20235.2M-2.8%1.4M3.79
    31 March 20235.3M-11.6%1.2M4.56
    15 March 20236.0M-13.6%1.8M3.31
    28 February 20237.0M-2.4%1.7M4.19
    15 February 20237.2M-6.4%1.1M6.61
    31 January 20237.6M+21.0%1.3M5.97
    13 January 20236.3M+17.6%1.5M4.13
    30 December 20225.4M-0.3%1.6M3.30
    15 December 20225.4M-4.2%1.2M4.35
    30 November 20225.6M+12.2%2.4M2.35
    15 November 20225.0M-12.8%1.9M2.62
    31 October 20225.7M-1.9%804K7.15
    14 October 20225.9M+4.7%1.2M4.73
    30 September 20225.6M+3.6%1.2M4.54
    15 September 20225.4M-7.7%997K5.41
    31 August 20225.8M-3.9%978K5.97
    15 August 20226.1M+5.1%1.7M3.54
    29 July 20225.8M-5.1%1.2M4.90
    15 July 20226.1M-5.2%1.2M5.21
    30 June 20226.4M-9.9%1.3M4.87
    15 June 20227.1M+1.0%1.2M6.06
    31 May 20227.1M-14.9%1.4M5.08
    13 May 20228.3M-0.6%2.0M4.24
    29 April 20228.4M+9.2%1.7M4.82
    14 April 20227.6M+0.1%1.4M5.57
    31 March 20227.6M+52.1%2.5M3.11
    15 March 20225.0M-8.2%7.5M1.00
    28 February 20225.5M+0.1%1.0M5.39
    15 February 20225.5M-2.1%784K6.98
    31 January 20225.6M+18.6%1.5M3.77
    14 January 20224.7M-10.6%1.6M3.00
    31 December 20215.3M+4.0%595K8.87
    15 December 20215.1M-2.1%867K5.85
    30 November 20215.2M+2.8%836K6.20
    15 November 20215.0M-3.8%748K6.74
    29 October 20215.2M-4.4%410K12.78
    15 October 20215.5M-0.8%475K11.53
    30 September 20215.5M-1.5%686K8.05
    15 September 20215.6M-4.0%507K11.06
    31 August 20215.8M-2.3%583K10.02
    13 August 20216.0M-3.5%754K7.94
    30 July 20216.2M-1.8%1.3M4.91
    15 July 20216.3M+6.4%978K6.46
    30 June 20215.9M-13.5%2.2M2.71
    15 June 20216.9M+2.3%899K7.64
    28 May 20216.7M+3.8%837K8.02
    14 May 20216.5M+7.2%1.0M6.28
    30 April 20216.0M+12.2%619K9.74
    15 April 20215.4M-5.5%560K9.58
    31 March 20215.7M+0.7%807K7.05
    15 March 20215.6M+3.9%1.1M5.37
    26 February 20215.4M+11.5%681K7.97
    12 February 20214.9M+0.3%515K9.46
    29 January 20214.9M-3.2%933K5.20
    15 January 20215.0M-0.8%809K6.20
    31 December 20205.1M-0.3%808K6.25
    15 December 20205.1M+11.9%677K7.49
    30 November 20204.5M-6.5%386K11.75
    13 November 20204.8M-0.9%619K7.83
    30 October 20204.9M-1.8%330K14.83
    15 October 20205.0M-4.6%547K9.11
    30 September 20205.2M-11.0%919K5.68
    15 September 20205.9M+7.3%913K6.43
    31 August 20205.5M-2.8%665K8.22
    14 August 20205.6M-6.9%664K8.48
    31 July 20206.0M-1.5%546K11.07
    15 July 20206.1M+4.7%582K10.53
    30 June 20205.9M+16.2%890K6.58
    15 June 20205.0M+2.9%605K8.33
    29 May 20204.9M-1.2%533K9.20
    15 May 20205.0M-14.3%1.2M4.29
    30 April 20205.8M-7.8%751K7.71
    15 April 20206.3M+22.5%1.6M4.00
    31 March 20205.1M+23.6%1.3M3.94
    13 March 20204.1M+19.0%986K4.21
    28 February 20203.5M+6.1%854K4.08
    14 February 20203.3M-8.9%507K6.47
    31 January 20203.6M-9.6%555K6.50
    15 January 20204.0M+9.5%614K6.50
    31 December 20193.6M+30.4%850K4.29
    13 December 20192.8M-4.3%747K3.74
    29 November 20192.9M-11.4%638K4.57
    15 November 20193.3M+1.1%523K6.30
    31 October 20193.3M+15.6%937K3.48
    15 October 20192.8M-12.5%598K4.72
    30 September 20193.2M+17.1%638K5.05
    13 September 20192.8M+0.6%667K4.13
    30 August 20192.7M+0.2%578K4.73
    15 August 20192.7M-11.8%1,000K2.73
    31 July 20193.1M-27.5%446K6.94
    15 July 20194.3M+30.4%380K11.24
    28 June 20193.3M+29.9%1.2M2.71
    14 June 20192.5M+15.3%698K3.61
    31 May 20192.2M-11.6%506K4.32
    15 May 20192.5M-0.3%896K2.76
    30 April 20192.5M+26.3%921K2.69
    15 April 20192.0M+15.5%472K4.16
    29 March 20191.7M-25.3%639K2.66
    15 March 20192.3M+0.9%904K2.52
    28 February 20192.3M-5.7%413K5.46
    15 February 20192.4M+14.5%412K5.81
    31 January 20192.1M+7.4%596K3.51
    15 January 20191.9M-2.1%807K2.41
    31 December 20182.0M+6.0%637K3.12
    14 December 20181.9M-5.4%563K3.33
    30 November 20182.0M+11.4%533K3.72
    15 November 20181.8M-23.1%850K2.09
    31 October 20182.3M+6.4%407K5.68
    15 October 20182.2M+19.7%744K2.92
    28 September 20181.8M+81.4%1.1M1.64
    14 September 20181.0M+10.7%896K1.12
    31 August 2018903K-15.9%658K1.37
    15 August 20181.1M-28.8%598K1.80
    31 July 20181.5M-6.7%542K2.79
    13 July 20181.6M+44.0%1.1M1.46
    29 June 20181.1M+1.1%849K1.32
    15 June 20181.1M+1.0%264K4.21
    31 May 20181.1M-0.4%155K7.10
    15 May 20181.1M-5.7%217K5.08
    30 April 20181.2M+1.0%94K12.47
    13 April 20181.2M-5.0%142K8.17
    29 March 20181.2M-12.2%151K8.07
    15 March 20181.4M-5.3%173K8.05
    28 February 20181.5M-4.9%98K14.99
    15 February 20181.5M+5.3%138K11.19
    31 January 20181.5M-0.4%120K12.27
    12 January 20181.5M+6.1%101K14.52
    29 December 20171.4M95K14.62
    Shares in millions (M) or thousands (K); hold the pointer on a figure for the exact count. FINRA publishes consolidated short interest twice a month, about ten days after each settlement.