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Nautilus Biotechnology, Inc. short interest

5.6M shares of Nautilus Biotechnology were sold short at the 15 October 2026 settlement, near the top of its range over the last year (180K to 5.8M). Short sellers would need 1.0 days of normal trading to buy them back.

Shares sold short5.6Mat 15 Oct 2026
Change on the settlement before-2.6%+3017% over a year
Days to cover1.00at 12.6M shares a day
Of shares in issue4.41%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 (180K to 5.8M), and the share price moved +149% 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

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    The bar ranks every company on the site from the lowest on the left to the highest on the right, in three equal thirds; the small figures under it are the values where each third starts, and the black tick is the middle company. The orange dot is this company; the grey ticks are the other companies in its industry (hover or tap for names). A hatched block is companies tied at none.

    Every settlement since 15 Jun 2021 as a table
    SettlementShares shortChangeAverage daily volumeDays to cover
    15 October 20265.6M-2.6%12.6M1.00
    30 September 20265.8M+41.4%4.1M1.42
    15 September 20264.1M+7.0%1.3M3.24
    31 August 20263.8M+20.9%592K6.44
    14 August 20263.2M+38.8%860K3.67
    31 July 20262.3M+56.9%836K2.72
    15 July 20261.4M+74.6%1.1M1.30
    30 June 2026830K+53.3%1.3M1.00
    15 June 2026541K-28.8%408K1.33
    29 May 2026760K-7.9%433K1.76
    15 May 2026825K+15.3%391K2.11
    30 April 2026716K+12.0%290K2.47
    15 April 2026639K-5.3%318K2.01
    31 March 2026675K+51.1%503K1.34
    13 March 2026447K+13.9%189K2.36
    27 February 2026392K+14.0%271K1.44
    13 February 2026344K+12.0%157K2.20
    30 January 2026307K-16.6%197K1.56
    15 January 2026369K-17.2%235K1.57
    31 December 2025445K+14.3%182K2.45
    15 December 2025389K-7.5%282K1.38
    28 November 2025421K+7.8%427K1.00
    14 November 2025391K+112.1%655K1.00
    31 October 2025184K+2.1%867K1.00
    15 October 2025180K-4.2%286K1.00
    30 September 2025188K+7.4%476K1.00
    15 September 2025175K-22.2%348K1.00
    29 August 2025225K+0.3%176K1.28
    15 August 2025225K-16.2%214K1.05
    31 July 2025268K+11.2%178K1.51
    15 July 2025241K-18.9%163K1.48
    30 June 2025298K-75.9%954K1.00
    13 June 20251.2M+17.6%193K6.39
    30 May 20251.0M+11.4%135K7.75
    15 May 2025942K+8.6%202K4.65
    30 April 2025867K+58.0%200K4.33
    15 April 2025549K+29.3%180K3.06
    31 March 2025425K+20.5%191K2.22
    14 March 2025352K+20.8%103K3.40
    28 February 2025292K+3.0%142K2.06
    14 February 2025283K+4.1%88K3.23
    31 January 2025272K-68.8%108K2.52
    15 January 2025873K-15.6%146K5.98
    31 December 20241.0M-14.1%189K5.47
    13 December 20241.2M+2.5%150K8.01
    29 November 20241.2M+0.4%115K10.25
    15 November 20241.2M-3.5%152K7.71
    31 October 20241.2M+0.5%78K15.45
    15 October 20241.2M-0.3%44K27.20
    30 September 20241.2M-0.6%117K10.36
    13 September 20241.2M+3.0%59K20.62
    30 August 20241.2M-0.5%56K21.11
    15 August 20241.2M-0.7%69K17.20
    31 July 20241.2M+2.2%72K16.70
    15 July 20241.2M-3.0%58K20.26
    28 June 20241.2M+5.2%116K10.44
    14 June 20241.1M+5.2%55K20.73
    31 May 20241.1M-0.9%71K15.32
    15 May 20241.1M-1.4%64K17.05
    30 April 20241.1M+0.2%67K16.75
    15 April 20241.1M-7.0%65K17.23
    28 March 20241.2M-2.8%63K18.95
    15 March 20241.2M-6.2%124K9.93
    29 February 20241.3M+7.3%66K19.86
    15 February 20241.2M-0.7%84K14.53
    31 January 20241.2M-0.6%59K20.96
    12 January 20241.2M-5.7%94K13.21
    29 December 20231.3M+1.4%123K10.69
    15 December 20231.3M+3.9%105K12.40
    30 November 20231.2M-8.8%64K19.62
    15 November 20231.4M+11.1%107K12.78
    31 October 20231.2M-5.6%124K9.91
    13 October 20231.3M-4.1%78K16.65
    29 September 20231.4M+5.5%57K24.02
    15 September 20231.3M-1.3%88K14.72
    31 August 20231.3M+7.8%50K26.35
    15 August 20231.2M+5.4%69K17.60
    31 July 20231.2M+11.2%72K15.90
    14 July 20231.0M+11.8%142K7.30
    30 June 2023925K+107.0%252K3.67
    15 June 2023447K-24.5%122K3.67
    31 May 2023592K+29.7%74K8.02
    15 May 2023456K+2.8%50K9.13
    28 April 2023444K+1.6%60K7.41
    14 April 2023437K-6.9%70K6.23
    31 March 2023469K-49.7%203K2.31
    15 March 2023932K+4.3%100K9.32
    28 February 2023894K-40.2%95K9.41
    15 February 20231.5M-0.7%90K16.58
    31 January 20231.5M-1.8%130K11.62
    13 January 20231.5M+1.1%166K9.26
    30 December 20221.5M-2.6%221K6.88
    15 December 20221.6M-2.8%140K11.12
    30 November 20221.6M-4.4%134K11.94
    15 November 20221.7M-8.7%143K11.73
    31 October 20221.8M-2.3%139K13.24
    14 October 20221.9M-1.9%125K15.08
    30 September 20221.9M-16.3%177K10.81
    15 September 20222.3M-0.0%161K14.24
    31 August 20222.3M+1.7%297K7.71
    15 August 20222.3M+0.6%270K8.34
    29 July 20222.2M-2.0%148K15.13
    15 July 20222.3M+3.6%235K9.74
    30 June 20222.2M+22.3%933K2.36
    15 June 20221.8M-17.0%334K5.39
    31 May 20222.2M+15.2%247K8.80
    13 May 20221.9M+6.5%341K5.53
    29 April 20221.8M+2.0%233K7.59
    14 April 20221.7M-3.1%207K8.39
    31 March 20221.8M+12.9%379K4.73
    15 March 20221.6M-4.9%167K9.49
    28 February 20221.7M+10.1%243K6.86
    15 February 20221.5M-8.9%285K5.32
    31 January 20221.7M-25.7%508K3.27
    14 January 20222.2M-54.8%300K7.46
    31 December 20214.9M+4.0%619K8.00
    15 December 20214.8M+6.9%557K8.55
    30 November 20214.5M-4.7%408K10.90
    15 November 20214.7M-6.6%389K12.00
    29 October 20215.0M+21.0%412K12.15
    15 October 20214.1M+5.9%320K12.90
    30 September 20213.9M+6.0%563K6.93
    15 September 20213.7M+3.1%566K6.51
    31 August 20213.6M+17.5%356K10.04
    13 August 20213.0M+191.9%3.4M1.00
    30 July 20211.0M+63.6%149K6.98
    15 July 2021637K+23.4%142K4.50
    30 June 2021516K+80.8%227K2.27
    15 June 2021286K339K1.00
    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.