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Nautilus Biotechnology (NAUT) Short Interest Ratio & Short Volume

Nautilus Biotechnology logo
$2.32 -0.06 (-2.52%)
Closing price 11/13/2026 04:00 PM Eastern
Extended Trading
$2.27 -0.05 (-2.33%)
As of 11/13/2026 07:58 PM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Massive. Learn more.
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Nautilus Biotechnology Short Interest Overview

As of October 30, 2026, Nautilus Biotechnology (NAUT) had a short interest of 5.84 million shares sold short, representing 7.78% of the public float. This marks a 3.91% increase in short interest since the prior report. The short interest ratio (days to cover) is 0.5, meaning it would take 0.5 days of the average trading volume of 8.70 million shares to cover all short positions.

Current Short Interest
5,839,384 shares
Previous Short Interest
5,619,648 shares
Change Vs. Previous Report
3.91%
Dollar Volume Sold Short
$15.94 million
Short Interest Ratio
0.5 Days to Cover
Last Record Date
October 30, 2026
Outstanding Shares
127,370,000 shares
Short Percent of Float
7.78%
Today's Trading Volume
1,879,554 shares
Average Trading Volume
8,698,966 shares
Today's Volume Vs. Average
22%
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Short Interest ChartDays to Cover ChartShort Percent of Float Chart

NAUT Short Interest Over Time

NAUT Days to Cover Over Time

NAUT Percentage of Float Shorted Over Time

Nautilus Biotechnology Tesla Short Interest History & Recent Changes

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Report DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date
10/30/20265,839,384 shares $15.94 million +3.9%7.8%0.5 $2.73
10/15/20265,619,648 shares $12.14 million -2.6%7.5%0.45 $2.16
9/30/20265,771,054 shares $8.19 million +41.4%7.7%1.42 $1.42
9/15/20264,082,014 shares $3.64 million +7.0%5.4%3.24 $0.89
8/31/20263,814,029 shares $3.71 million +20.9%5.1%6.44 $0.97
8/14/20263,154,786 shares $2.81 million +38.8%4.2%3.67 $0.89
7/31/20262,273,103 shares $2.22 million +56.9%3.0%2.72 $0.98
7/15/20261,448,757 shares $2.52 million +74.7%1.9%1.3 $1.74
6/30/2026829,522 shares $1.55 million +53.3%1.1%0.62 $1.87
6/15/2026541,139 shares $1.22 million -28.8%0.7%1.33 $2.25
5/29/2026760,157 shares $2.08 million -7.9%1.0%1.76 $2.74
5/15/2026825,026 shares $2.07 million +15.3%1.1%2.11 $2.51
4/30/2026715,637 shares $1.88 million +12.0%1.0%2.47 $2.63
4/15/2026638,943 shares $2.08 million -5.3%0.9%2.01 $3.25
3/31/2026674,952 shares $2.62 million +51.1%0.9%1.34 $3.88
3/13/2026446,652 shares $1.04 million +13.9%0.6%2.36 $2.33
2/27/2026392,211 shares $949.15 thousand +14.0%0.5%1.44 $2.42
2/13/2026344,071 shares $753.52 thousand +12.0%0.5%2.2 $2.19
1/30/2026307,305 shares $599.24 thousand -16.6%0.4%1.56 $1.95
1/15/2026368,545 shares $674.44 thousand -17.2%0.5%1.57 $1.83
12/31/2025445,221 shares $868.18 thousand +14.3%0.6%2.45 $1.95
12/15/2025389,399 shares $739.86 thousand -7.5%0.5%1.38 $1.90
11/28/2025420,880 shares $946.98 thousand +7.8%0.6%0.99 $2.25
11/14/2025390,590 shares $703.06 thousand +112.1%0.5%0.6 $1.80
10/31/2025184,156 shares $244.93 thousand +2.1%0.2%0.21 $1.33
10/15/2025180,300 shares $198.33 thousand -4.2%0.3%0.5 $1.10
9/30/2025188,200 shares $159.01 thousand +7.4%0.3%0.7 $0.84
9/15/2025175,200 shares $135.67 thousand -22.2%0.3%0.5 $0.77
8/31/2025225,300 shares $153.20 thousand +0.3%0.4%0.7 $0.68
8/15/2025224,700 shares $160.12 thousand -16.2%0.4%0.7 $0.71
7/31/2025268,200 shares $203.83 thousand +11.2%0.5%0.9 $0.76
7/15/2025241,300 shares $173.74 thousand -18.9%0.4%0.8 $0.72
6/30/2025297,600 shares $215.73 thousand -75.8%0.5%1 $0.72
6/15/20251,230,000 shares $862.23 thousand +17.1%2.1%5.9 $0.70
5/31/20251,050,000 shares $782.36 thousand +11.4%1.8%5.9 $0.75
5/15/2025942,200 shares $815.85 thousand +8.6%1.6%5.4 $0.87
4/30/2025867,400 shares $597.29 thousand +58.0%1.5%5.5 $0.69
4/15/2025548,900 shares $422.71 thousand +29.3%1.0%3.8 $0.77
3/31/2025424,500 shares $365.49 thousand +20.5%0.7%3.1 $0.86
3/15/2025352,300 shares $391.05 thousand +20.8%0.6%2.5 $1.11
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2/28/2025291,600 shares $379.08 thousand +3.0%0.5%2.2 $1.30
2/15/2025283,200 shares $484.27 thousand +4.1%0.5%2.2 $1.71
1/31/2025272,000 shares $465.12 thousand -68.8%0.5%1.9 $1.71
1/15/2025872,900 shares $1.69 million -15.3%1.5%6.1 $1.94
12/31/20241,030,000 shares $1.73 million -14.2%1.8%7.9 $1.68
12/15/20241,200,000 shares $2.34 million +2.6%2.1%10.2 $1.95
11/30/20241,170,000 shares $2.62 million No Change2.0%11 $2.24
11/15/20241,170,000 shares $2.69 million -3.3%2.0%12.9 $2.30
10/31/20241,210,000 shares $3.15 million No Change1.6%14.8 $2.60
10/15/20241,210,000 shares $3.44 million No Change1.6%16.7 $2.84
9/30/20241,210,000 shares $3.45 million -0.8%1.6%16.8 $2.85
9/15/20241,220,000 shares $3.54 million +3.4%1.6%15.8 $2.90
8/31/20241,180,000 shares $3.07 million -0.8%1.6%16.8 $2.60
8/15/20241,190,000 shares $2.75 million -0.8%1.6%16.1 $2.31
7/31/20241,200,000 shares $3.25 million +2.6%1.6%16.2 $2.71
7/15/20241,170,000 shares $3.05 million -3.3%1.6%16.4 $2.61
6/30/20241,210,000 shares $2.83 million +5.2%1.6%17.3 $2.34
6/15/20241,150,000 shares $2.94 million +5.5%1.5%16.4 $2.56
5/31/20241,090,000 shares $2.99 million -0.9%1.5%14.8 $2.74
5/15/20241,100,000 shares $3.16 million -1.8%1.5%14.6 $2.87
4/30/20241,120,000 shares $2.84 million +0.9%2.0%14.5 $2.54
4/15/20241,110,000 shares $2.73 million -7.5%2.0%14.5 $2.46
3/31/20241,200,000 shares $3.53 million -2.4%2.1%15.4 $2.94
3/15/20241,230,000 shares $3.15 million -6.1%2.2%14.5 $2.56
2/29/20241,310,000 shares $3.52 million +6.5%2.1%14.5 $2.69
2/15/20241,230,000 shares $3.76 million No Change2.3%14.6 $3.06
1/31/20241,230,000 shares $3.42 million -0.8%2.3%13.7 $2.78
1/15/20241,240,000 shares $3.86 million -6.1%2.3%12.7 $3.11
12/31/20231,320,000 shares $3.95 million +1.5%2.5%12.7 $2.99
12/15/20231,300,000 shares $4.13 million +4.0%2.5%13.4 $3.18
11/30/20231,250,000 shares $3.44 million -8.8%2.4%14.1 $2.75
11/15/20231,370,000 shares $4.11 million +11.4%2.0%15.7 $3.00
10/31/20231,230,000 shares $3.15 million -6.1%2.3%15.3 $2.56
10/15/20231,310,000 shares $3.75 million -3.7%2.5%16.9 $2.86
9/30/20231,360,000 shares $4.30 million +5.4%2.0%18.8 $3.16
9/15/20231,290,000 shares $5.08 million -1.5%1.9%15 $3.94
8/31/20231,310,000 shares $4.23 million +8.3%1.9%12.2 $3.23
8/15/20231,210,000 shares $3.74 million +5.2%1.8%10.6 $3.09
7/31/20231,150,000 shares $3.78 million +11.7%1.7%9.9 $3.29
7/15/20231,030,000 shares $3.52 million +11.3%2.3%9.1 $3.42
6/30/2023925,100 shares $3.58 million +107.1%2.0%8.5 $3.87
6/15/2023446,800 shares $1.77 million -24.5%1.0%4.3 $3.97
5/31/2023591,700 shares $1.69 million +29.7%1.3%6 $2.86
5/15/2023456,200 shares $1.16 million +2.8%1.0%4.7 $2.55
4/30/2023443,800 shares $1.15 million +1.6%1.0%4.4 $2.58
4/15/2023436,900 shares $1.24 million -6.9%1.0%3.8 $2.83
3/31/2023469,300 shares $1.30 million -49.7%1.0%3.7 $2.77
3/15/2023932,300 shares $2.06 million +4.3%2.1%6.6 $2.21
2/28/2023894,200 shares $1.90 million -40.4%1.8%6.5 $2.12
2/15/20231,500,000 shares $3.09 million -0.7%3.0%10.9 $2.06
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1/31/20231,510,000 shares $2.96 million -1.3%3.1%9.9 $1.96
1/15/20231,530,000 shares $3.15 million +0.7%3.1%9.7 $2.06
12/30/20221,520,000 shares $2.74 million -2.6%3.4%10.1 $1.80
12/15/20221,560,000 shares $2.45 million -2.5%3.5%10.4 $1.57
11/30/20221,600,000 shares $2.90 million -4.8%3.6%10.9 $1.81
11/15/20221,680,000 shares $3.38 million -8.7%3.8%11.3 $2.01
10/31/20221,840,000 shares $4.54 million -2.1%4.2%9.9 $2.47
10/15/20221,880,000 shares $3.84 million -2.1%4.3%9.5 $2.04
9/30/20221,920,000 shares $4.07 million -16.2%4.3%9.4 $2.12
9/15/20222,290,000 shares $5.06 million No Change5.2%7.5 $2.21
8/31/20222,290,000 shares $5.06 million +1.8%5.2%6.6 $2.21
8/15/20222,250,000 shares $6.35 million +0.5%5.1%6 $2.82
7/31/20222,240,000 shares $6.52 million -1.8%5.1%6.2 $2.91
7/15/20222,280,000 shares $6.22 million +3.6%5.2%6.1 $2.73
6/30/20222,200,000 shares $5.92 million +22.2%5.0%5.8 $2.69
6/15/20221,800,000 shares $4.86 million -17.1%4.1%4.8 $2.70
5/31/20222,170,000 shares $7.94 million +15.4%4.9%7.9 $3.66
5/15/20221,880,000 shares $7.03 million +6.2%4.3%7.2 $3.74
4/30/20221,770,000 shares $8.27 million +2.3%3.2%7 $4.67
4/15/20221,730,000 shares $7.01 million -3.4%3.1%6 $4.05
3/31/20221,790,000 shares $7.77 million +12.6%3.2%6 $4.34
3/15/20221,590,000 shares $5.84 million -4.8%2.8%4.4 $3.67
2/28/20221,670,000 shares $6.68 million +10.6%3.0%4.2 $4.00
2/15/20221,510,000 shares $6.10 million -9.0%3.2%3.5 $4.04
1/31/20221,660,000 shares $6.51 million -25.9%5.1%3.6 $3.92
1/15/20222,240,000 shares $9.92 million -54.8%6.7%5 $4.43
12/31/20214,950,000 shares $25.64 million +4.0%14.8%11 $5.18
12/15/20214,760,000 shares $25.09 million +7.0%14.3%10.8 $5.27
11/30/20214,450,000 shares $21.58 million -4.7%13.1%10.2 $4.85
11/15/20214,670,000 shares $25.03 million -6.6%13.7%10.8 $5.36

NAUT Short Interest - Frequently Asked Questions

Short interest is the volume of Nautilus Biotechnology shares that have been sold short but have not yet been covered or closed out. As of October 30th, investors have sold 5,839,384 shares of NAUT short. 7.78% of Nautilus Biotechnology's shares are currently sold short. Learn More on Nautilus Biotechnology's current short interest.

The short interest ratio, also known as the "days to cover ratio", is calculated by dividing the number of shares of a stock sold short divided by its average trading volume. A short interest ratio ranging between 1 and 4 generally indicates strong positive sentiment about a stock and a lack of short sellers. A short interest ratio of 10 or greater indicates strong pessimism about a stock. NAUT shares currently have a short interest ratio of 0.5. Learn More on Nautilus Biotechnology's short interest ratio.

Companies that have a short interest as a percentage of float below 10% indicates positive investor sentiment and few short sellers. Stocks with a short interest percentage above 10% is considered high, suggesting some investors are pessimistic about the stock. Companies with a short interest percentage of 20% or more indicates widespread negative sentiment. 7.78% of Nautilus Biotechnology's floating shares are currently sold short.

Nautilus Biotechnology saw an increase in short interest since the prior report. As of October 30th, there was short interest totaling 5,839,384 shares, an increase of 3.9% from the previous total of 5,619,648 shares. Changes in short volume can be used to identify positive and negative investor sentiment. Investors that short sell a stock are betting that its price will decline in the future. An increase in short sale volume suggests bearish (negative) sentiment among investors. A decrease on short sale volume suggests bullish (positive) sentiment.

7.78% of Nautilus Biotechnology's shares are currently sold short. Here is how the short interest of companies in the industry of "life sciences tools & services" compare to Nautilus Biotechnology: CryoPort, Inc. (7.59%), Cytek Biosciences, Inc. (3.50%), OmniAb, Inc. (6.08%), Pacific Biosciences of California, Inc. (17.93%), Mesa Laboratories, Inc. (6.93%), Ginkgo Bioworks Holdings, Inc. (16.14%), Evotec AG (0.02%), Alpha Teknova, Inc. (2.82%), Simulations Plus, Inc. (17.60%), Quantum-Si Incorporated (7.44%),

As of the most recent reporting period, the following stocks had the largest short interest positions: SPDR S&P 500 ETF Trust ($77.66 billion), Invesco QQQ ($57.17 billion), iShares Russell 2000 ETF ($21.91 billion), SPDR S&P Biotech ETF ($10.53 billion), Union Pacific Corporation ($9.26 billion), iShares iBoxx $ High Yield Corporate Bond ETF ($9.05 billion), Nebius Group N.V. ($7.85 billion), iShares 20+ Year Treasury Bond ETF ($7.81 billion), Moderna, Inc. ($7.36 billion), and iShares iBoxx $ Investment Grade Corporate Bond ETF ($7.20 billion). View all of the most shorted stocks.

Short selling NAUT is an investing strategy that aims to generate trading profit from Nautilus Biotechnology as its price is falling. NAUT shares are trading down $0.06 today. To short a stock, an investor borrows shares, sells them and buys the shares back on the public market later to return it to the lender. Short sellers are betting that a stock will decline in price. If the stock does drop after selling, the short seller buys it back at a lower price and returns it to the lender. The difference between the sell price and the buy price is the trader's profit.

A short squeeze for Nautilus Biotechnology occurs when it has a large amount of short interest and its stock appreciates in price. This forces short sellers to cover their short interest positions by buying actual shares of NAUT, which in turn drives the price of the stock up even further.

Short interest is typically published by a stock exchange once per month. However, NASDAQ publishes a report for U.S. stocks, including NAUT, twice per month. The most recent reporting period available is October, 30 2026.

Understanding short interest metrics can help you assess how traders are positioning around a stock like NAUT:

  • Shares Sold Short: The total number of shares that have been sold by short sellers but have not yet been covered or closed out. A high number may indicate bearish sentiment.
  • Short Float: The percentage of a company’s publicly available shares (or "float") that are sold short. A higher short float suggests a greater portion of the stock is being bet against.
  • Days to Cover (Short Interest Ratio): This estimates how many days it would take short sellers to cover their positions, based on average daily trading volume. Higher values can signal potential for a short squeeze if buying pressure increases.

These metrics are often used by traders to gauge sentiment, volatility risk, and the potential for price movements based on short covering activity.


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Short Interest Tools

Short interest data for NASDAQ:NAUT is sourced from the Financial Industry Regulatory Authority (FINRA), with the most recent report published on 11/10/2026. FINRA publishes updated short interest twice a month.
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