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CytomX Therapeutics (CTMX) Short Interest Ratio & Short Volume

CytomX Therapeutics logo
$3.34 -0.11 (-3.04%)
As of 11:52 AM Eastern
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CytomX Therapeutics Short Interest Overview

As of July 31, 2026, CytomX Therapeutics (CTMX) had a short interest of 35.11 million shares sold short, representing 21.45% of the public float. This marks a -12.92% decrease in short interest since the prior report. The short interest ratio (days to cover) is 11.8, meaning it would take 11.8 days of the average trading volume of 4.93 million shares to cover all short positions.

Current Short Interest
35,110,952 shares
Previous Short Interest
40,322,256 shares
Change Vs. Previous Month
-12.92%
Dollar Volume Sold Short
$108.84 million
Short Interest Ratio
11.8 Days to Cover
Last Record Date
July 31, 2026
Outstanding Shares
217,900,000 shares
Short Percent of Float
21.45%
Today's Trading Volume
752,993 shares
Average Trading Volume
4,932,989 shares
Today's Volume Vs. Average
15%
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Short Interest ChartDays to Cover ChartShort Percent of Float Chart

CTMX Short Interest Over Time

CTMX Days to Cover Over Time

CTMX Percentage of Float Shorted Over Time

CytomX 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
7/31/202635,110,952 shares $108.84 million -12.9%21.4%11.78 $3.10
7/15/202640,322,256 shares $148.39 million +13.4%24.6%10.38 $3.68
6/30/202635,567,462 shares $133.38 million +16.2%21.7%4.32 $3.75
6/15/202630,605,562 shares $93.04 million +6.6%18.7%8.65 $3.04
5/29/202628,719,341 shares $103.39 million -7.8%18.1%9.31 $3.60
5/15/202631,133,767 shares $112.39 million +4.7%19.6%10.32 $3.61
4/30/202629,742,798 shares $125.51 million +8.1%18.7%8.44 $4.22
4/15/202627,517,975 shares $125.48 million +24.9%16.8%5.41 $4.56
3/31/202622,031,153 shares $103.55 million +7.9%13.5%1.14 $4.70
3/13/202620,415,174 shares $95.54 million +8.2%12.5%7.1 $4.68
2/27/202618,864,576 shares $101.30 million +11.2%11.5%8.03 $5.37
2/13/202616,961,879 shares $90.24 million +14.5%10.4%4.66 $5.32
1/30/202614,813,750 shares $84.29 million -8.1%9.0%3.33 $5.69
1/15/202616,118,163 shares $68.50 million -32.0%9.8%7.49 $4.25
12/31/202523,696,755 shares $100.95 million +41.3%14.5%6.56 $4.26
12/15/202516,770,738 shares $69.26 million -2.4%10.2%9.2 $4.13
11/28/202517,187,962 shares $72.36 million -41.4%10.5%7.62 $4.21
11/14/202529,319,732 shares $113.76 million +2.1%19.0%5.59 $3.88
10/31/202528,725,162 shares $102.55 million +1.2%18.6%12.11 $3.57
10/15/202528,400,000 shares $96.84 million -9.5%18.4%7.9 $3.41
9/30/202531,370,000 shares $100.07 million +8.3%N/A9.6 $3.19
9/15/202528,960,000 shares $57.63 million +7.4%N/A10.5 $1.99
8/31/202526,970,000 shares $55.02 million +7.3%17.5%10.1 $2.04
8/15/202525,140,000 shares $48.02 million +4.9%N/A9 $1.91
7/31/202523,960,000 shares $52.47 million +0.4%31.8%4.9 $2.19
7/15/202523,870,000 shares $57.29 million +6.6%N/A4.8 $2.40
6/30/202522,390,000 shares $50.83 million +7.7%29.7%4.5 $2.27
6/15/202520,790,000 shares $57.17 million +9.7%27.6%4.3 $2.75
5/31/202518,960,000 shares $47.78 million +6.9%26.1%4.1 $2.52
5/15/202517,730,000 shares $35.46 million +82.0%24.4%3.5 $2.00
4/30/20259,740,000 shares $7.25 million +1.8%N/A4.3 $0.74
4/15/20259,570,000 shares $6.04 million +2.2%13.1%5.4 $0.63
3/31/20259,360,000 shares $5.95 million +4.0%12.9%5.1 $0.64
3/15/20259,000,000 shares $5.85 million +91.5%12.4%5 $0.65
2/28/20254,700,000 shares $3.18 million +6.8%6.5%2.6 $0.68
2/15/20254,400,000 shares $3.50 million -3.3%6.0%3.9 $0.80
1/31/20254,550,000 shares $3.87 million -1.7%N/A3.6 $0.85
1/15/20254,630,000 shares $3.97 million -3.5%N/A3.6 $0.86
12/31/20244,800,000 shares $4.94 million -13.4%N/A3.9 $1.03
12/15/20245,540,000 shares $6.15 million +26.2%N/A4.8 $1.11
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11/30/20244,390,000 shares $4.65 million -1.1%N/A4 $1.06
11/15/20244,440,000 shares $4.04 million -21.7%N/A5.5 $0.91
10/31/20245,670,000 shares $5.65 million -6.6%N/A7.4 $1.00
10/15/20246,070,000 shares $6.80 million -2.9%N/A9.4 $1.12
9/30/20246,250,000 shares $7.38 million -10.5%N/A9.1 $1.18
9/15/20246,980,000 shares $8.59 million -2.4%N/A8.2 $1.23
8/31/20247,150,000 shares $8.44 million -9.2%N/A6.5 $1.18
8/15/20247,870,000 shares $9.37 million +1.7%N/A6 $1.19
7/31/20247,740,000 shares $10.68 million No ChangeN/A2.5 $1.38
7/15/20247,740,000 shares $10.91 million -3.9%N/A1.2 $1.41
6/30/20248,050,000 shares $9.82 million +3.7%N/A1.2 $1.22
6/15/20247,760,000 shares $10.71 million -1.8%N/A1.2 $1.38
5/31/20247,900,000 shares $13.43 million -9.7%N/A1.2 $1.70
5/15/20248,750,000 shares $17.15 million +143.1%N/A1.4 $1.96
4/30/20243,600,000 shares $5.87 million +0.3%N/A0.6 $1.63
4/15/20243,590,000 shares $7.07 million +8.1%N/A4 $1.97
3/31/20243,320,000 shares $7.24 million -6.0%N/A3.8 $2.18
3/15/20243,530,000 shares $7.31 million +115.2%N/A4.1 $2.07
2/29/20241,640,000 shares $4.02 million +26.2%N/A2.2 $2.45
2/15/20241,300,000 shares $1.95 million +4.0%N/A2.8 $1.50
1/31/20241,250,000 shares $1.91 million -5.3%N/A4.2 $1.53
1/15/20241,320,000 shares $2.28 million -0.8%N/A4.4 $1.73
12/31/20231,330,000 shares $2.06 million +35.5%N/A4.9 $1.55
12/15/2023981,600 shares $1.38 million -26.8%N/A5 $1.41
11/30/20231,340,000 shares $1.86 million +0.8%N/A7.5 $1.39
11/15/20231,330,000 shares $1.72 million +5.6%N/A8 $1.29
10/31/20231,260,000 shares $1.39 million -18.2%N/A7 $1.10
10/15/20231,540,000 shares $1.93 million -9.9%N/A8.5 $1.25
9/30/20231,710,000 shares $2.21 million -23.0%N/A9.5 $1.29
9/15/20232,220,000 shares $3.06 million +2.3%N/A8.2 $1.38
8/31/20232,170,000 shares $3.26 million +5.9%N/A7.5 $1.50
8/15/20232,050,000 shares $3.26 million -21.5%N/A6.5 $1.59
7/31/20232,610,000 shares $4.54 million -3.0%4.0%7 $1.74
7/15/20232,690,000 shares $4.90 million +13.0%4.1%6.8 $1.82
6/30/20232,380,000 shares $4.09 million No Change3.7%5.3 $1.72
6/15/20232,380,000 shares $3.71 million +4.4%3.7%4.5 $1.56
5/31/20232,280,000 shares $3.90 million +7.0%3.5%3.4 $1.71
5/15/20232,130,000 shares $3.88 million -13.4%3.3%2.8 $1.82
4/30/20232,460,000 shares $4.01 million +9.3%3.8%2.8 $1.63
4/15/20232,250,000 shares $3.74 million +40.6%3.5%2 $1.66
3/31/20231,600,000 shares $2.42 million -14.9%2.5%1 $1.51
3/15/20231,880,000 shares $3.82 million +48.0%2.9%0.8 $2.03
2/28/20231,270,000 shares $2.73 million -8.0%2.0%0.5 $2.15
2/15/20231,380,000 shares $3.20 million -13.8%2.1%0.5 $2.32
1/31/20231,600,000 shares $4.32 million -43.3%2.5%0.5 $2.70
1/15/20232,820,000 shares $8.07 million +433.7%4.3%1 $2.86
12/30/2022528,400 shares $845.44 thousand -64.1%0.8%0.2 $1.60
12/15/20221,470,000 shares $2.34 million -26.1%2.3%1.1 $1.59
11/30/20221,990,000 shares $3.46 million +103.7%3.1%1.6 $1.74
11/15/2022977,100 shares $1.16 million -2.0%1.5%0.8 $1.19
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10/31/2022997,400 shares $1.31 million -6.8%1.6%2 $1.31
10/15/20221,070,000 shares $1.52 million -10.8%1.7%1.6 $1.42
9/30/20221,200,000 shares $1.74 million +2.6%1.9%1.3 $1.45
9/15/20221,170,000 shares $1.94 million +30.9%1.9%0.7 $1.66
8/31/2022894,100 shares $1.34 million -14.0%1.4%0.5 $1.50
8/15/20221,040,000 shares $1.80 million -21.2%1.7%0.6 $1.73
7/31/20221,320,000 shares $1.89 million +1.5%2.1%0.7 $1.43
7/15/20221,300,000 shares $1.95 million +10.2%2.1%0.7 $1.50
6/30/20221,180,000 shares $2.16 million -67.7%1.9%0.7 $1.83
6/15/20223,650,000 shares $6.28 million -4.5%5.9%3.2 $1.72
5/31/20223,820,000 shares $6.15 million -5.5%6.1%3.5 $1.61
5/15/20224,040,000 shares $7.11 million +6.3%6.5%3.8 $1.76
4/30/20223,800,000 shares $6.50 million +37.7%6.2%3.9 $1.71
4/15/20222,760,000 shares $6.38 million -29.6%4.5%3.2 $2.31
3/31/20223,920,000 shares $10.47 million +2.6%6.4%4.4 $2.67
3/15/20223,820,000 shares $11.38 million No Change6.3%3.2 $2.98
2/28/20223,820,000 shares $14.63 million -2.1%6.3%3.4 $3.83
2/15/20223,900,000 shares $15.91 million +11.4%6.4%3.2 $4.08
1/31/20223,500,000 shares $16.10 million -5.4%5.6%2.7 $4.60
1/15/20223,700,000 shares $14.62 million +19.4%5.9%2.9 $3.95
12/31/20213,100,000 shares $13.42 million -22.3%5.0%2.6 $4.33
12/15/20213,990,000 shares $26.65 million +9.0%6.4%3.6 $6.68
11/30/20213,660,000 shares $24.19 million -21.8%5.9%5.3 $6.61
11/15/20214,680,000 shares $33.98 million -3.3%7.5%7.6 $7.26
10/29/20214,840,000 shares $28.70 million +7.6%7.7%8.1 $5.93
10/15/20214,500,000 shares $23.13 million -7.4%7.2%8.1 $5.14
9/30/20214,860,000 shares $24.74 million -7.3%7.7%8.1 $5.09
9/15/20215,240,000 shares $26.04 million -11.2%8.3%7.6 $4.97
8/31/20215,900,000 shares $30.21 million -11.7%9.4%8.6 $5.12

CTMX Short Interest - Frequently Asked Questions

Short interest is the volume of CytomX Therapeutics shares that have been sold short but have not yet been covered or closed out. As of July 31st, traders have sold 35,110,952 shares of CTMX short. 21.45% of CytomX Therapeutics' shares are currently sold short. Learn More on CytomX 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. CTMX shares currently have a short interest ratio of 11.8. Learn More on CytomX 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. 21.45% of CytomX Therapeutics' floating shares are currently sold short.

CytomX Therapeutics saw a drop in short interest in the month of July. As of July 31st, there was short interest totaling 35,110,952 shares, a drop of 12.9% from the previous total of 40,322,256 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.

21.45% of CytomX Therapeutics' shares are currently sold short. Here is how the short interest of companies in the industry of "biotechnology" compare to CytomX Therapeutics: Hemab Therapeutics Holdings, Inc. (4.36%), Vericel Corporation (9.37%), Sionna Therapeutics, Inc. (9.79%), Nuvation Bio Inc. (21.95%), Pharvaris N.V. (1.82%), Palvella Therapeutics, Inc. (17.34%), ADMA Biologics Inc (9.84%), Biohaven Ltd. (14.01%), AbCellera Biologics Inc. (22.01%), Stoke Therapeutics, Inc. (27.10%),

As of the most recent reporting period, the following stocks had the largest short interest positions: SPDR S&P 500 ETF Trust ($70.50 billion), Invesco QQQ ($50.36 billion), iShares Russell 2000 ETF ($21.20 billion), Western Digital Corporation ($13.40 billion), SPDR S&P Biotech ETF ($11.59 billion), Nebius Group N.V. ($11.46 billion), iShares 20+ Year Treasury Bond ETF ($7.84 billion), iShares iBoxx $ High Yield Corporate Bond ETF ($7.51 billion), iShares Semiconductor ETF ($6.37 billion), and Financial Select Sector SPDR Fund ($6.34 billion). View all of the most shorted stocks.

Short selling CTMX is an investing strategy that aims to generate trading profit from CytomX Therapeutics as its price is falling. CTMX shares are trading up $0.09 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 CytomX 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 CTMX, 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 CTMX, twice per month. The most recent reporting period available is July, 31 2026.

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

  • 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:CTMX is sourced from the Financial Industry Regulatory Authority (FINRA), with the most recent report published on 8/11/2026. FINRA publishes updated short interest twice a month.
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