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Live Earnings Conference Call: Arcturus Therapeutics will host a live Q3 2026 earnings call on November 5, 2026 at 5:30PM ET. Follow this link to get details and listen to Arcturus Therapeutics' Q3 2026 earnings call when it goes live. Get details.

Arcturus Therapeutics (ARCT) Short Interest Ratio & Short Volume

Arcturus Therapeutics logo
$9.41 -1.46 (-13.42%)
As of 10:54 AM Eastern
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Arcturus Therapeutics Short Interest Overview

As of October 15, 2026, Arcturus Therapeutics (ARCT) had a short interest of 5.46 million shares sold short, representing 23.37% of the public float. This marks a 1.52% increase in short interest since the prior report. The short interest ratio (days to cover) is 8.4, meaning it would take 8.4 days of the average trading volume of 629,271 shares to cover all short positions.

Current Short Interest
5,459,944 shares
Previous Short Interest
5,378,106 shares
Change Vs. Previous Report
1.52%
Dollar Volume Sold Short
$61.53 million
Short Interest Ratio
8.4 Days to Cover
Last Record Date
October 15, 2026
Outstanding Shares
28,420,000 shares
Short Percent of Float
23.37%
Today's Trading Volume
126,742 shares
Average Trading Volume
629,271 shares
Today's Volume Vs. Average
20%
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Short Interest ChartDays to Cover ChartShort Percent of Float Chart

ARCT Short Interest Over Time

ARCT Days to Cover Over Time

ARCT Percentage of Float Shorted Over Time

Arcturus Therapeutics 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
10/15/20265,459,944 shares $61.53 million +1.5%23.4%8.36 $11.27
9/30/20265,378,106 shares $73.63 million -1.6%23.0%5.93 $13.69
9/15/20265,467,974 shares $86.61 million -10.3%23.4%6.37 $15.84
8/31/20266,096,901 shares $89.99 million -6.6%26.1%3.06 $14.76
8/14/20266,526,090 shares $53.71 million -9.5%27.9%9.86 $8.23
7/31/20267,206,773 shares $41.51 million +2.9%30.8%16.52 $5.76
7/15/20267,004,482 shares $44.76 million +3.0%30.0%10.71 $6.39
6/30/20266,801,943 shares $45.71 million +1.4%29.1%15.47 $6.72
6/15/20266,708,681 shares $49.17 million -0.3%28.7%17.72 $7.33
5/29/20266,728,068 shares $53.29 million +2.3%28.8%16.38 $7.92
5/15/20266,574,536 shares $49.11 million +2.1%28.1%13.27 $7.47
4/30/20266,441,740 shares $55.53 million +3.0%27.6%20.16 $8.62
4/15/20266,251,989 shares $53.89 million -3.1%26.8%14.33 $8.62
3/31/20266,450,517 shares $49.80 million +8.6%27.6%11.05 $7.72
3/13/20265,938,449 shares $39.67 million -2.4%24.7%10.8 $6.68
2/27/20266,081,175 shares $50.05 million -7.5%26.0%17.51 $8.23
2/13/20266,574,077 shares $47.40 million -4.5%28.1%14.91 $7.21
1/30/20266,882,188 shares $51.41 million -4.3%28.6%16.27 $7.47
1/15/20267,188,672 shares $54.71 million +0.4%29.9%12.59 $7.61
12/31/20257,159,495 shares $43.89 million -7.1%29.7%11.5 $6.13
12/15/20257,706,521 shares $55.87 million -1.3%32.0%9.84 $7.25
11/28/20257,810,428 shares $52.99 million -15.2%32.5%8.25 $6.79
11/14/20259,210,027 shares $66.96 million +32.6%38.3%9.14 $7.27
10/31/20256,948,548 shares $69.28 million +30.9%30.2%2.32 $9.97
10/15/20255,310,000 shares $114.54 million +3.3%21.4%4.9 $21.57
9/30/20255,140,000 shares $94.73 million -13.6%20.7%7.8 $18.43
9/15/20255,950,000 shares $107.87 million +10.0%23.9%10.3 $18.13
8/31/20255,410,000 shares $92.02 million +5.3%21.8%10.1 $17.01
8/15/20255,140,000 shares $100.13 million +17.6%20.7%9.4 $19.48
7/31/20254,370,000 shares $53.36 million -2.5%17.6%9.5 $12.21
7/15/20254,480,000 shares $58.91 million -11.1%18.0%10.1 $13.15
6/30/20255,040,000 shares $65.57 million +1.4%20.3%10.9 $13.01
6/15/20254,970,000 shares $61.53 million -9.6%20.0%11.2 $12.38
5/31/20255,500,000 shares $69.47 million +1.7%22.2%12.3 $12.63
5/15/20255,410,000 shares $62.97 million +5.3%21.8%12.7 $11.64
4/30/20255,140,000 shares $65.84 million +1.4%21.1%12.1 $12.81
4/15/20255,070,000 shares $53.59 million +9.0%20.8%11.7 $10.57
3/31/20254,650,000 shares $49.24 million +5.4%19.1%10.7 $10.59
3/15/20254,410,000 shares $62.09 million +5.3%18.1%10.6 $14.08
2/28/20254,190,000 shares $70.35 million -1.0%17.2%10.1 $16.79
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2/15/20254,230,000 shares $76.35 million -6.8%17.4%10.4 $18.05
1/31/20254,540,000 shares $77.04 million -9.9%18.5%10.6 $16.97
1/15/20255,040,000 shares $84.47 million +4.6%20.5%12.5 $16.76
12/31/20244,820,000 shares $81.80 million +8.6%19.6%12 $16.97
12/15/20244,440,000 shares $76.41 million +1.6%18.1%11.3 $17.21
11/30/20244,370,000 shares $80.15 million -2.5%17.8%11.1 $18.34
11/15/20244,480,000 shares $71.77 million -2.2%18.2%11.4 $16.02
10/31/20244,580,000 shares $81.20 million +3.4%18.5%12.8 $17.73
10/15/20244,430,000 shares $92.90 million -3.7%17.9%12 $20.97
9/30/20244,600,000 shares $106.77 million -12.1%18.6%11.8 $23.21
9/15/20245,230,000 shares $108.52 million -2.8%21.2%11.6 $20.75
8/31/20245,380,000 shares $113.52 million -1.5%21.8%10.5 $21.10
8/15/20245,460,000 shares $110.62 million +1.9%22.1%9.5 $20.26
7/31/20245,360,000 shares $125.75 million +2.9%21.7%9.1 $23.46
7/15/20245,210,000 shares $121.81 million +11.3%21.2%8.7 $23.38
6/30/20244,680,000 shares $113.96 million +6.9%19.0%7.6 $24.35
6/15/20244,380,000 shares $135.78 million +6.6%17.8%7.4 $31.00
5/31/20244,110,000 shares $159.51 million -0.5%16.7%7.4 $38.81
5/15/20244,130,000 shares $119.83 million -16.1%16.8%8.2 $29.02
4/30/20244,920,000 shares $125.80 million +6.7%20.0%9.7 $25.57
4/15/20244,610,000 shares $135.12 million -4.2%18.8%9.7 $29.31
3/31/20244,810,000 shares $162.43 million +14.3%19.6%10.6 $33.77
3/15/20244,210,000 shares $152.87 million -0.2%17.2%10 $36.31
2/29/20244,220,000 shares $163.57 million -6.6%17.3%10.1 $38.76
2/15/20244,520,000 shares $172.62 million +3.4%18.6%11.4 $38.19
1/31/20244,370,000 shares $144.08 million +5.3%18.0%10.3 $32.97
1/15/20244,150,000 shares $137.57 million +0.5%17.1%9.8 $33.15
12/31/20234,130,000 shares $130.22 million -6.8%17.0%10.1 $31.53
12/15/20234,430,000 shares $127.94 million -18.4%18.2%10.9 $28.88
11/30/20235,430,000 shares $129.99 million +7.1%22.3%13.5 $23.94
11/15/20235,070,000 shares $114.18 million +1.6%20.8%13.1 $22.52
10/31/20234,990,000 shares $95.31 million +4.2%20.6%13.6 $19.10
10/15/20234,790,000 shares $109.79 million +3.9%19.8%12.3 $22.92
9/30/20234,610,000 shares $117.79 million +10.0%19.0%10.8 $25.55
9/15/20234,190,000 shares $119.58 million +6.6%17.3%9.4 $28.54
8/31/20233,930,000 shares $119.28 million +0.3%16.2%8.8 $30.35
8/15/20233,920,000 shares $117.36 million +2.1%16.2%8.9 $29.94
7/31/20233,840,000 shares $134.25 million +5.8%15.9%8.6 $34.96
7/15/20233,630,000 shares $128.65 million +9.0%15.0%8.4 $35.44
6/30/20233,330,000 shares $95.50 million -8.0%13.8%7.7 $28.68
6/15/20233,620,000 shares $99.48 million +0.3%15.0%6.8 $27.48
5/31/20233,610,000 shares $98.70 million +8.7%15.0%7 $27.34
5/15/20233,320,000 shares $101.69 million +5.7%13.8%6.4 $30.63
4/30/20233,140,000 shares $83.59 million +11.7%13.7%6.4 $26.62
4/15/20232,810,000 shares $77.47 million +6.0%12.3%5.9 $27.57
3/31/20232,650,000 shares $63.52 million +4.3%11.6%5.8 $23.97
3/15/20232,540,000 shares $40.49 million +8.6%11.1%7.5 $15.94
2/28/20232,340,000 shares $38.03 million +4.9%10.2%5.8 $16.25
2/15/20232,230,000 shares $41.32 million +21.9%9.8%5.5 $18.53
1/31/20231,830,000 shares $38.67 million +9.6%8.0%3.8 $21.13
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1/15/20231,670,000 shares $33.20 million -12.1%7.3%2.9 $19.88
12/30/20221,900,000 shares $32.22 million -27.8%8.3%3.3 $16.96
12/15/20222,630,000 shares $47.97 million -7.4%11.5%4.5 $18.24
11/30/20222,840,000 shares $52.37 million +9.2%12.4%5.2 $18.44
11/15/20222,600,000 shares $46.80 million -10.0%11.4%4.8 $18.00
10/31/20222,890,000 shares $51.15 million +9.5%12.6%5.6 $17.70
10/15/20222,640,000 shares $37.75 million +6.0%11.5%6.2 $14.30
9/30/20222,490,000 shares $36.90 million +9.7%10.9%5.7 $14.82
9/15/20222,270,000 shares $37.18 million +1.3%9.9%4.9 $16.38
8/31/20222,240,000 shares $31.45 million -14.2%9.8%4.1 $14.04
8/15/20222,610,000 shares $56.56 million -7.8%11.4%4.4 $21.67
7/31/20222,830,000 shares $49.67 million -2.1%12.4%4.5 $17.55
7/15/20222,890,000 shares $48.41 million -2.7%12.7%4.4 $16.75
6/30/20222,970,000 shares $46.75 million -12.1%13.1%4 $15.74
6/15/20223,380,000 shares $44.99 million +1.2%14.9%4.6 $13.31
5/31/20223,340,000 shares $66.40 million +8.1%14.7%5 $19.88
5/15/20223,090,000 shares $52.47 million +1.3%13.6%4.8 $16.98
4/30/20223,050,000 shares $59.11 million +24.0%13.4%5.1 $19.38
4/15/20222,460,000 shares $65.21 million -5.0%10.8%4 $26.51
3/31/20222,590,000 shares $69.83 million +9.8%11.4%5 $26.96
3/15/20222,360,000 shares $43.80 million -4.5%10.4%4.4 $18.56
2/28/20222,470,000 shares $59.21 million -4.6%10.9%4.3 $23.97
2/15/20222,590,000 shares $64.36 million -1.9%11.4%4.4 $24.85
1/31/20222,640,000 shares $68.98 million +17.3%11.6%4.2 $26.13
1/15/20222,250,000 shares $75.33 million -4.3%9.9%3.7 $33.48
12/31/20212,350,000 shares $86.97 million +10.9%10.4%4.1 $37.01
12/15/20212,120,000 shares $75.30 million -15.2%9.3%3.6 $35.52
11/30/20212,500,000 shares $99.38 million +12.1%11.0%5 $39.75
11/15/20212,230,000 shares $79.23 million +9.9%9.8%4.6 $35.53

ARCT Short Interest - Frequently Asked Questions

Short interest is the volume of Arcturus Therapeutics shares that have been sold short but have not yet been closed out or covered. As of October 15th, traders have sold 5,459,944 shares of ARCT short. 23.37% of Arcturus Therapeutics' shares are currently sold short. Learn More on Arcturus Therapeutics' 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. ARCT shares currently have a short interest ratio of 8.4. Learn More on Arcturus Therapeutics'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. 23.37% of Arcturus Therapeutics' floating shares are currently sold short.

Arcturus Therapeutics saw an increase in short interest since the prior report. As of October 15th, there was short interest totaling 5,459,944 shares, an increase of 1.5% from the previous total of 5,378,106 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.

23.37% of Arcturus Therapeutics' shares are currently sold short. Here is how the short interest of companies in the industry of "biotechnology" compare to Arcturus Therapeutics: Vor Biopharma Inc. (12.62%), Replimune Group, Inc. (26.11%), ArriVent BioPharma, Inc. (15.10%), MannKind Corporation (8.14%), Janux Therapeutics, Inc. (9.46%), MoonLake Immunotherapeutics (10.27%), Immatics N.V. (2.74%), Odyssey Therapeutics, Inc. (6.83%), Jade Biosciences, Inc. (22.91%), Monte Rosa Therapeutics, Inc. (25.87%),

As of the most recent reporting period, the following stocks had the largest short interest positions: SPDR S&P 500 ETF Trust ($71.77 billion), Invesco QQQ ($59.70 billion), iShares Russell 2000 ETF ($23.54 billion), Medtronic PLC ($13.33 billion), SPDR S&P Biotech ETF ($10.47 billion), iShares iBoxx $ High Yield Corporate Bond ETF ($10.36 billion), Nebius Group N.V. ($8.98 billion), iShares 20+ Year Treasury Bond ETF ($8.92 billion), iShares iBoxx $ Investment Grade Corporate Bond ETF ($8.10 billion), and iShares Semiconductor ETF ($7.74 billion). View all of the most shorted stocks.

Short selling ARCT is an investing strategy that aims to generate trading profit from Arcturus Therapeutics as its price is falling. ARCT shares are trading up $1.33 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 Arcturus Therapeutics occurs when it has a large amount of short interest and its stock increases in price. This forces short sellers to cover their short interest positions by buying actual shares of ARCT, 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 ARCT, twice per month. The most recent reporting period available is October, 15 2026.

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

  • 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.


Related Companies
Short Interest Tools

Short interest data for NASDAQ:ARCT is sourced from the Financial Industry Regulatory Authority (FINRA), with the most recent report published on 10/26/2026. FINRA publishes updated short interest twice a month.
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