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C4 Therapeutics (CCCC) Short Interest Ratio & Short Volume

C4 Therapeutics logo
$3.16 +0.31 (+10.88%)
Closing price 04:00 PM Eastern
Extended Trading
$3.15 -0.01 (-0.25%)
As of 07:59 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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C4 Therapeutics Short Interest Overview

As of September 30, 2026, C4 Therapeutics (CCCC) had a short interest of 40.40 million shares sold short, representing 34.78% of the public float. This marks a 0.51% increase in short interest since the prior report. The short interest ratio (days to cover) is 17.7, meaning it would take 17.7 days of the average trading volume of 2.19 million shares to cover all short positions.

Current Short Interest
40,395,665 shares
Previous Short Interest
40,189,287 shares
Change Vs. Previous Month
0.51%
Dollar Volume Sold Short
$134.52 million
Short Interest Ratio
17.7 Days to Cover
Last Record Date
September 30, 2026
Outstanding Shares
123,030,000 shares
Short Percent of Float
34.78%
Today's Trading Volume
2,505,784 shares
Average Trading Volume
2,192,271 shares
Today's Volume Vs. Average
114%
Short Selling C4 Therapeutics?
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Short Interest ChartDays to Cover ChartShort Percent of Float Chart

CCCC Short Interest Over Time

CCCC Days to Cover Over Time

CCCC Percentage of Float Shorted Over Time

C4 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
9/30/202640,395,665 shares $134.52 million +0.5%34.8%17.65 $3.33
9/15/202640,189,287 shares $137.85 million +7.4%34.6%22.68 $3.43
8/31/202637,413,259 shares $138.80 million +9.9%32.2%16.74 $3.71
8/14/202634,048,321 shares $144.36 million +11.9%29.3%13.93 $4.24
7/31/202630,427,514 shares $105.89 million +27.8%29.2%11.12 $3.48
7/15/202623,815,010 shares $90.50 million -4.7%22.8%6.65 $3.80
6/30/202624,997,175 shares $116.74 million +12.4%23.9%5.25 $4.67
6/15/202622,246,308 shares $84.98 million +2.8%21.3%9.52 $3.82
5/29/202621,650,001 shares $94.61 million +1.9%20.7%9.43 $4.37
5/15/202621,254,462 shares $75.67 million +1.0%20.4%5.81 $3.56
4/30/202621,055,109 shares $59.59 million +0.1%20.2%10.88 $2.83
4/15/202621,042,260 shares $60.81 million +30.2%20.2%5.05 $2.89
3/31/202616,157,271 shares $42.49 million +19.4%15.5%8.42 $2.63
3/13/202613,534,910 shares $36.81 million +58.8%15.2%3.74 $2.72
2/27/20268,520,947 shares $23.01 million +19.7%8.2%3.4 $2.70
2/13/20267,121,324 shares $13.46 million -1.2%6.8%8.19 $1.89
1/30/20267,207,214 shares $13.69 million -2.3%8.1%3.84 $1.90
1/15/20267,379,826 shares $16.38 million +1.4%8.3%5.79 $2.22
12/31/20257,281,152 shares $13.91 million +1.5%8.2%3.5 $1.91
12/15/20257,172,653 shares $17.43 million +28.4%8.1%4.38 $2.43
11/28/20255,588,028 shares $14.92 million +15.3%6.3%4.84 $2.67
11/14/20254,848,155 shares $11.97 million +0.8%5.5%2.92 $2.47
10/31/20254,811,669 shares $12.56 million +20.7%7.4%1.89 $2.61
10/15/20253,990,000 shares $8.86 million +13.4%6.1%2 $2.22
9/30/20253,520,000 shares $7.81 million -0.6%N/A1.9 $2.22
9/15/20253,540,000 shares $12.64 million -6.4%N/A2.1 $3.57
8/31/20253,780,000 shares $9.83 million -8.9%5.8%2.5 $2.60
8/15/20254,150,000 shares $10.21 million -10.9%N/A2.8 $2.46
7/31/20254,660,000 shares $9.55 million +14.5%7.2%3.2 $2.05
7/15/20254,070,000 shares $8.59 million -17.9%N/A2.9 $2.11
6/30/20254,960,000 shares $7.09 million -22.3%7.7%3.9 $1.43
6/15/20256,380,000 shares $10.72 million +3.4%9.8%5.8 $1.68
5/31/20256,170,000 shares $7.62 million -3.0%9.6%5.8 $1.24
5/15/20256,360,000 shares $8.78 million -0.8%9.9%5.7 $1.38
4/30/20256,410,000 shares $10.51 million -17.1%N/A5.1 $1.64
4/15/20257,730,000 shares $9.20 million -0.4%12.0%5.6 $1.19
3/31/20257,760,000 shares $12.42 million -5.0%12.0%5.4 $1.60
3/15/20258,170,000 shares $16.59 million -4.4%12.7%5 $2.03
2/28/20258,550,000 shares $23.17 million +6.1%13.2%4.7 $2.71
2/15/20258,060,000 shares $25.63 million +8.9%12.5%4.4 $3.18
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1/31/20257,400,000 shares $25.68 million -20.3%N/A4.4 $3.47
1/15/20259,280,000 shares $37.49 million +7.9%N/A6 $4.04
12/31/20248,600,000 shares $30.96 million -3.0%N/A6.4 $3.60
12/15/20248,870,000 shares $38.85 million +11.0%N/A7.3 $4.38
11/30/20247,990,000 shares $36.35 million +8.0%N/A7.3 $4.55
11/15/20247,400,000 shares $31.89 million +26.5%N/A7.3 $4.31
10/31/20245,850,000 shares $31.18 million -12.0%N/A6 $5.33
10/15/20246,650,000 shares $41.90 million -39.6%N/A6.7 $6.30
9/30/202411,010,000 shares $62.76 million -7.6%N/A9 $5.70
9/15/202411,920,000 shares $76.76 million +2.5%N/A8.1 $6.44
8/31/202411,630,000 shares $73.50 million +10.8%N/A7.4 $6.32
8/15/202410,500,000 shares $61.53 million +0.3%N/A6.6 $5.86
7/31/202410,470,000 shares $70.15 million -10.0%N/A6.3 $6.70
7/15/202411,630,000 shares $75.48 million +32.0%N/A7 $6.49
6/30/20248,810,000 shares $40.70 million -39.4%N/A5.7 $4.62
6/15/202414,540,000 shares $63.69 million +9.7%N/A10.2 $4.38
5/31/202413,260,000 shares $66.30 million +16.9%N/A8.4 $5.00
5/15/202411,340,000 shares $69.29 million +11.8%N/A5.9 $6.11
4/30/202410,140,000 shares $63.88 million +6.1%N/A4.5 $6.30
4/15/20249,560,000 shares $65.58 million +4.5%N/A3.7 $6.86
3/31/20249,150,000 shares $74.76 million +73.0%N/A2.4 $8.17
3/15/20245,290,000 shares $47.24 million +78.1%N/A1.1 $8.93
2/29/20242,970,000 shares $32.61 million -6.6%N/A0.2 $10.98
2/15/20243,180,000 shares $25.12 million -5.1%N/A0.2 $7.90
1/31/20243,350,000 shares $20.70 million -39.6%8.7%0.2 $6.18
1/15/20245,550,000 shares $37.74 million +22.3%14.5%0.4 $6.80
12/31/20234,540,000 shares $25.65 million -44.0%10.8%0.3 $5.65
12/15/20238,100,000 shares $40.10 million +330.9%19.3%0.7 $4.95
11/30/20231,880,000 shares $3.06 million -3.6%4.5%3.4 $1.63
11/15/20231,950,000 shares $3.51 million +2.1%4.7%4.1 $1.80
10/31/20231,910,000 shares $2.85 million +4.4%4.6%3.9 $1.49
10/15/20231,830,000 shares $3.64 million -19.0%4.6%3.8 $1.99
9/30/20232,260,000 shares $4.20 million -5.0%5.6%5.2 $1.86
9/15/20232,380,000 shares $5.31 million +14.4%5.9%2.4 $2.23
8/31/20232,080,000 shares $6.03 million +9.5%5.2%1.9 $2.90
8/15/20231,900,000 shares $6.42 million -10.0%4.7%1.6 $3.38
7/31/20232,110,000 shares $8.21 million -5.8%5.3%1.7 $3.89
7/15/20232,240,000 shares $7.50 million -8.9%5.6%1.8 $3.35
6/30/20232,460,000 shares $6.77 million -26.4%6.1%2 $2.75
6/15/20233,340,000 shares $12.06 million +2.8%8.3%5.1 $3.61
5/31/20233,250,000 shares $11.02 million +12.1%8.1%5.4 $3.39
5/15/20232,900,000 shares $9.69 million +0.7%7.2%5.2 $3.34
4/30/20232,880,000 shares $8.70 million +1.8%7.0%5 $3.02
4/15/20232,830,000 shares $9.48 million +7.6%6.9%4.9 $3.35
3/31/20232,630,000 shares $8.26 million -9.9%6.5%4.5 $3.14
3/15/20232,920,000 shares $12.59 million -10.2%7.2%5.1 $4.31
2/28/20233,250,000 shares $17.13 million +0.9%8.0%6.3 $5.27
2/15/20233,220,000 shares $18.58 million -12.5%7.9%6.1 $5.77
1/31/20233,680,000 shares $28.67 million +2.8%9.0%7 $7.79
1/15/20233,580,000 shares $30.57 million +2.0%8.8%7.8 $8.54
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12/30/20223,510,000 shares $20.71 million -3.6%8.6%7.8 $5.90
12/15/20223,640,000 shares $29.48 million +0.3%8.9%8 $8.10
11/30/20223,630,000 shares $31.11 million -8.1%8.9%7.5 $8.57
11/15/20223,950,000 shares $38.39 million -19.1%9.7%8.5 $9.72
10/31/20224,880,000 shares $46.95 million -1.2%11.9%11.4 $9.62
10/15/20224,940,000 shares $39.32 million -2.0%12.9%12.1 $7.96
9/30/20225,040,000 shares $44.20 million +11.0%13.2%11.9 $8.77
9/15/20224,540,000 shares $51.57 million -6.8%11.8%9.8 $11.36
8/31/20224,870,000 shares $49.09 million -5.1%12.7%9.9 $10.08
8/15/20225,130,000 shares $62.23 million -3.2%13.4%9.2 $12.13
7/31/20225,300,000 shares $51.09 million +1.5%13.9%8.2 $9.64
7/15/20225,220,000 shares $52.30 million +2.8%13.7%7.2 $10.02
6/30/20225,080,000 shares $38.30 million +20.7%13.3%4.7 $7.54
6/15/20224,210,000 shares $23.11 million -2.1%11.0%3.7 $5.49
5/31/20224,300,000 shares $31.22 million +10.3%11.3%4.2 $7.26
5/15/20223,900,000 shares $27.89 million -23.7%10.2%3.9 $7.15
4/30/20225,110,000 shares $43.79 million -4.7%13.4%5.4 $8.57
4/15/20225,360,000 shares $47.97 million +4.7%14.0%5.8 $8.95
3/31/20225,120,000 shares $124.21 million +8.5%13.4%7.2 $24.26
3/15/20224,720,000 shares $101.48 million +29.7%12.4%9.8 $21.50
2/28/20223,640,000 shares $81.65 million +8.7%9.5%7.6 $22.43
2/15/20223,350,000 shares $80.03 million +23.2%8.8%7.7 $23.89
1/31/20222,720,000 shares $66.45 million -13.1%7.1%6.7 $24.43
1/15/20223,130,000 shares $86.20 million -1.6%8.1%9.5 $27.54
12/31/20213,180,000 shares $102.40 million +6.0%8.3%10.9 $32.20
12/15/20213,000,000 shares $91.50 million +8.3%7.8%11 $30.50
11/30/20212,770,000 shares $102.82 million +0.4%7.2%10.6 $37.12
11/15/20212,760,000 shares $115.09 million +2.2%7.2%10.3 $41.70
10/29/20212,700,000 shares $119.93 million +1.5%7.0%9.9 $44.42
10/15/20212,660,000 shares $116.75 million No Change6.9%8.7 $43.89

CCCC Short Interest - Frequently Asked Questions

Short interest is the volume of C4 Therapeutics shares that have been sold short but have not yet been closed out or covered. As of September 15th, traders have sold 40,189,287 shares of CCCC short. 34.61% of C4 Therapeutics' shares are currently sold short. Learn More on C4 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. CCCC shares currently have a short interest ratio of 22.7. Learn More on C4 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. 34.61% of C4 Therapeutics' floating shares are currently sold short.

C4 Therapeutics saw a increase in short interest during the month of September. As of September 15th, there was short interest totaling 40,189,287 shares, an increase of 7.4% from the previous total of 37,413,259 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.

34.61% of C4 Therapeutics' shares are currently sold short. Here is how the short interest of companies in the industry of "biotechnology" compare to C4 Therapeutics: Inhibrx Biosciences, Inc. (28.21%), Kailera Therapeutics, Inc. (4.60%), Nektar Therapeutics (17.23%), Hemab Therapeutics Holdings, Inc. (5.65%), Omeros Corporation (19.28%), Kardigan, Inc. (2.75%), Nanobiotix S.A. - Sponsored ADR (0.36%), Replimune Group, Inc. (25.64%), Oric Pharmaceuticals, Inc. (17.94%), Tyra Biosciences, Inc. (18.92%),

As of the most recent reporting period, the following stocks had the largest short interest positions: SPDR S&P 500 ETF Trust ($75.21 billion), Invesco QQQ ($46.31 billion), iShares Russell 2000 ETF ($27.98 billion), SPDR S&P Biotech ETF ($11.59 billion), Nebius Group N.V. ($9.70 billion), Canadian Natural Resources Limited ($9.42 billion), iShares 20+ Year Treasury Bond ETF ($8.70 billion), iShares iBoxx $ High Yield Corporate Bond ETF ($8.53 billion), iShares iBoxx $ Investment Grade Corporate Bond ETF ($7.79 billion), and Financial Select Sector SPDR Fund ($7.74 billion). View all of the most shorted stocks.

Short selling CCCC is an investing strategy that aims to generate trading profit from C4 Therapeutics as its price is falling. CCCC shares are trading up $0.31 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 C4 Therapeutics 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 CCCC, 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 CCCC, twice per month. The most recent reporting period available is September, 15 2026.

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

  • 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:CCCC is sourced from the Financial Industry Regulatory Authority (FINRA), with the most recent report published on 10/9/2026. FINRA publishes updated short interest twice a month.
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