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Celldex Therapeutics (CLDX) Short Interest Ratio & Short Volume

Celldex Therapeutics logo
$29.89 +0.59 (+2.01%)
Closing price 10/9/2026 04:00 PM Eastern
Extended Trading
$30.00 +0.11 (+0.37%)
As of 10/9/2026 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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Celldex Therapeutics Short Interest Overview

As of September 30, 2026, Celldex Therapeutics (CLDX) had a short interest of 11.01 million shares sold short, representing 14.78% of the public float. This marks a 22.94% increase in short interest since the prior report. The short interest ratio (days to cover) is 3.8, meaning it would take 3.8 days of the average trading volume of 2.40 million shares to cover all short positions.

Current Short Interest
11,006,720 shares
Previous Short Interest
8,953,127 shares
Change Vs. Previous Month
22.94%
Dollar Volume Sold Short
$357.58 million
Short Interest Ratio
3.8 Days to Cover
Last Record Date
September 30, 2026
Outstanding Shares
78,530,000 shares
Short Percent of Float
14.78%
Today's Trading Volume
992,726 shares
Average Trading Volume
2,400,377 shares
Today's Volume Vs. Average
41%
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Short Interest ChartDays to Cover ChartShort Percent of Float Chart

CLDX Short Interest Over Time

CLDX Days to Cover Over Time

CLDX Percentage of Float Shorted Over Time

Celldex 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
9/30/202611,006,720 shares $357.58 million +22.9%14.8%3.81 $32.49
9/15/20268,953,127 shares $344.78 million +3.6%12.0%13.12 $38.51
8/31/20268,641,597 shares $342.47 million +14.2%11.6%12.23 $39.63
8/14/20267,569,702 shares $317.55 million -0.8%10.2%7.93 $41.95
7/31/20267,627,081 shares $290.29 million -0.5%10.3%7.62 $38.06
7/15/20267,663,191 shares $293.58 million -1.0%10.3%9.14 $38.31
6/30/20267,738,673 shares $287.96 million +6.1%10.4%4.3 $37.21
6/15/20267,295,393 shares $234.33 million +2.1%9.8%9.05 $32.12
5/29/20267,144,877 shares $224.56 million +0.2%9.6%10.73 $31.43
5/15/20267,130,776 shares $223.48 million -6.2%9.6%10.06 $31.34
4/30/20267,599,353 shares $249.87 million -8.5%10.2%9.41 $32.88
4/15/20268,309,099 shares $281.43 million -8.5%11.2%5.54 $33.87
3/31/20269,075,800 shares $287.88 million -1.8%12.2%8.49 $31.72
3/13/20269,237,012 shares $272.58 million +2.6%14.5%9.95 $29.51
2/27/20269,006,071 shares $270.99 million -1.9%12.1%8.44 $30.09
2/13/20269,181,713 shares $211.18 million -0.6%12.3%13.3 $23.00
1/30/20269,237,135 shares $227.23 million +2.2%14.5%19.42 $24.60
1/15/20269,034,401 shares $232.09 million +9.6%14.2%10.84 $25.69
12/31/20258,244,450 shares $223.92 million +20.1%13.0%12.26 $27.16
12/15/20256,865,432 shares $185.98 million -20.9%10.8%7.9 $27.09
11/28/20258,675,509 shares $234.20 million -1.9%13.7%13.27 $27.00
11/14/20258,845,278 shares $226.00 million +17.8%13.9%8.49 $25.55
10/31/20257,509,487 shares $200.73 million +1.5%11.8%10.41 $26.73
10/15/20257,400,000 shares $202.32 million +4.5%11.7%6.1 $27.34
9/30/20257,080,000 shares $183.16 million +7.6%N/A5.9 $25.87
9/15/20256,580,000 shares $161.21 million -8.7%N/A5.2 $24.50
8/31/20257,210,000 shares $159.20 million -1.4%11.4%5.7 $22.08
8/15/20257,310,000 shares $186.41 million -6.0%N/A6.1 $25.50
7/31/20257,780,000 shares $171.00 million -8.2%12.3%7.5 $21.98
7/15/20258,470,000 shares $193.54 million +7.6%N/A8.6 $22.85
6/30/20257,870,000 shares $160.15 million +0.5%12.4%7.9 $20.35
6/15/20257,830,000 shares $166.47 million -6.5%12.3%8.3 $21.26
5/31/20258,370,000 shares $163.13 million -8.3%13.1%9.6 $19.49
5/15/20259,130,000 shares $183.51 million +1.3%14.3%11.3 $20.10
4/30/20259,010,000 shares $187.68 million +2.6%N/A11.6 $20.83
4/15/20258,780,000 shares $161.29 million +5.8%13.8%11 $18.37
3/31/20258,300,000 shares $150.65 million -9.3%13.0%9.3 $18.15
3/15/20259,150,000 shares $186.84 million +3.0%14.3%10.5 $20.42
2/28/20258,880,000 shares $182.66 million -3.4%13.9%9.7 $20.57
2/15/20259,190,000 shares $208.61 million +3.6%14.4%9.8 $22.70
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1/31/20258,870,000 shares $217.23 million +4.6%N/A8.8 $24.49
1/15/20258,480,000 shares $191.82 million +4.8%N/A8.2 $22.62
12/31/20248,090,000 shares $204.43 million +10.7%N/A8 $25.27
12/15/20247,310,000 shares $185.75 million -5.1%N/A6 $25.41
11/30/20247,700,000 shares $211.29 million -1.7%N/A6.5 $27.44
11/15/20247,830,000 shares $184.40 million -5.0%N/A6.8 $23.55
10/31/20248,240,000 shares $214.73 million -1.9%N/A7.7 $26.06
10/15/20248,400,000 shares $246.96 million +1.1%N/A8.3 $29.40
9/30/20248,310,000 shares $282.46 million -1.2%N/A8.5 $33.99
9/15/20248,410,000 shares $371.39 million -1.9%N/A11.4 $44.16
8/31/20248,570,000 shares $354.20 million -1.0%N/A12.2 $41.33
8/15/20248,660,000 shares $286.65 million +3.1%N/A12.2 $33.10
7/31/20248,400,000 shares $320.12 million +13.7%N/A12.1 $38.11
7/15/20247,390,000 shares $292.27 million +5.7%N/A11.5 $39.55
6/30/20246,990,000 shares $258.70 million +8.7%N/A10.9 $37.01
6/15/20246,430,000 shares $222.93 million +2.6%N/A10.1 $34.67
5/31/20246,270,000 shares $208.79 million -5.3%N/A9.1 $33.30
5/15/20246,620,000 shares $265.93 million -5.3%N/A7.4 $40.17
4/30/20246,990,000 shares $261.57 million +3.6%N/A7.7 $37.42
4/15/20246,750,000 shares $263.72 million +2.9%N/A7.3 $39.07
3/31/20246,560,000 shares $275.32 million +11.2%N/A6.9 $41.97
3/15/20245,900,000 shares $247.86 million -8.0%N/A6.4 $42.01
2/29/20246,410,000 shares $308.06 million -7.6%N/A7.4 $48.06
2/15/20246,940,000 shares $255.39 million +3.4%N/A9.3 $36.80
1/31/20246,710,000 shares $236.33 million +7.9%N/A8.5 $35.22
1/15/20246,220,000 shares $261.49 million -5.6%N/A7.6 $42.04
12/31/20236,590,000 shares $261.36 million -10.3%N/A8.6 $39.66
12/15/20237,350,000 shares $273.05 million -8.9%N/A9.6 $37.15
11/30/20238,070,000 shares $243.79 million +2.4%N/A11.1 $30.21
11/15/20237,880,000 shares $224.82 million +40.2%N/A11.3 $28.53
10/31/20235,620,000 shares $132.18 million +0.9%N/A9.2 $23.52
10/15/20235,570,000 shares $145.60 million -3.3%N/A12.1 $26.14
9/30/20235,760,000 shares $158.52 million -5.4%N/A13.1 $27.52
9/15/20236,090,000 shares $170.22 million -3.3%N/A14.3 $27.95
8/31/20236,300,000 shares $175.77 million -3.7%N/A13.5 $27.90
8/15/20236,540,000 shares $205.55 million +8.5%N/A14.3 $31.43
7/31/20236,030,000 shares $213.22 million -3.8%N/A13.8 $35.36
7/15/20236,270,000 shares $233.81 million +1.8%N/A13.5 $37.29
6/30/20236,160,000 shares $209.01 million +2.7%N/A11 $33.93
6/15/20236,000,000 shares $221.22 million +3.5%N/A9.8 $36.87
5/31/20235,800,000 shares $184.44 million +7.0%N/A9.3 $31.80
5/15/20235,420,000 shares $185.69 million +1.1%N/A8.4 $34.26
4/30/20235,360,000 shares $168.52 million +3.5%N/A8.4 $31.44
4/15/20235,180,000 shares $156.90 million -1.7%N/A8.6 $30.29
3/31/20235,270,000 shares $189.61 million +38.0%N/A9.9 $35.98
3/15/20233,820,000 shares $167.13 million +5.5%N/A8 $43.75
2/28/20233,620,000 shares $154.90 million +4.3%N/A7.5 $42.79
2/15/20233,470,000 shares $148.79 million +4.5%N/A7.7 $42.88
1/31/20233,320,000 shares $146.28 million -4.3%N/A6.8 $44.06
1/15/20233,470,000 shares $159.69 million +1.8%N/A7 $46.02
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12/30/20223,410,000 shares $151.98 million -17.2%N/A6.8 $44.57
12/15/20224,120,000 shares $182.47 million +1.7%N/A8 $44.29
11/30/20224,050,000 shares $150.21 million -1.9%N/A9 $37.09
11/15/20224,130,000 shares $151.53 million -8.2%N/A9 $36.69
10/31/20224,500,000 shares $158.09 million -0.9%N/A9.7 $35.13
10/15/20224,540,000 shares $142.74 million -1.5%N/A9.3 $31.44
9/30/20224,610,000 shares $129.59 million +2.4%N/A9 $28.11
9/15/20224,500,000 shares $136.40 million +2.3%N/A6.2 $30.31
8/31/20224,400,000 shares $133.76 million +4.0%N/A5.6 $30.40
8/15/20224,230,000 shares $158.92 million +14.3%N/A5.1 $37.57
7/31/20223,700,000 shares $113.66 million -2.9%30.7%4.3 $30.72
7/15/20223,810,000 shares $111.79 million -0.3%31.6%4.5 $29.34
6/30/20223,820,000 shares $102.99 million -18.9%31.7%4.7 $26.96
6/15/20224,710,000 shares $104.99 million +1.5%39.0%7.3 $22.29
5/31/20224,640,000 shares $109.13 million -5.5%N/A8 $23.52
5/15/20224,910,000 shares $147.25 million -1.0%N/A8.7 $29.99
4/30/20224,960,000 shares $151.53 million -9.3%N/A9 $30.55
4/15/20225,470,000 shares $196.04 million -0.2%N/A9.8 $35.84
3/31/20225,480,000 shares $186.65 million -8.7%N/A9.3 $34.06
3/15/20226,000,000 shares $187.26 million +3.3%N/A10.3 $31.21
2/28/20225,810,000 shares $173.72 million +11.7%N/A10 $29.90
2/15/20225,200,000 shares $169.78 million +2.4%N/A9.4 $32.65
1/31/20225,080,000 shares $157.53 million +3.3%N/A9.9 $31.01
1/15/20224,920,000 shares $157.00 million +3.1%N/A0 $31.91
12/31/20214,770,000 shares $184.31 million +9.9%N/A10.6 $38.64
12/15/20214,340,000 shares $166.92 million +6.6%N/A10.1 $38.46
11/30/20214,070,000 shares $155.07 million +12.4%N/A9.7 $38.10
11/15/20213,620,000 shares $155.70 million -2.7%N/A8.2 $43.01
10/29/20213,720,000 shares $158.25 million +25.7%N/A7.9 $42.54
10/15/20212,960,000 shares $136.69 million -0.7%N/A5.7 $46.18

CLDX Short Interest - Frequently Asked Questions

Short interest is the volume of Celldex Therapeutics shares that have been sold short but have not yet been closed out or covered. As of September 30th, investors have sold 11,006,720 shares of CLDX short. 14.78% of Celldex Therapeutics' shares are currently sold short. Learn More on Celldex 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. CLDX shares currently have a short interest ratio of 3.8. Learn More on Celldex 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. 14.78% of Celldex Therapeutics' floating shares are currently sold short.

Celldex Therapeutics saw a increase in short interest in September. As of September 30th, there was short interest totaling 11,006,720 shares, an increase of 22.9% from the previous total of 8,953,127 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.

14.78% of Celldex Therapeutics' shares are currently sold short. Here is how the short interest of companies in the industry of "biotechnology" compare to Celldex Therapeutics: ImmunityBio, Inc. (34.54%), Protagonist Therapeutics, Inc. (15.23%), Kymera Therapeutics, Inc. (14.18%), Arrowhead Pharmaceuticals, Inc. (7.92%), Vaxcyte, Inc. (12.02%), TG Therapeutics, Inc. (21.96%), Apogee Therapeutics Inc. (8.93%), Abivax SA Sponsored ADR (8.90%), Cytokinetics, Incorporated (15.95%), Praxis Precision Medicines, Inc. (15.46%),

As of the most recent reporting period, the following stocks had the largest short interest positions: SPDR S&P 500 ETF Trust ($75.10 billion), Invesco QQQ ($52.12 billion), iShares Russell 2000 ETF ($25.28 billion), SPDR S&P Biotech ETF ($11.70 billion), Nebius Group N.V. ($10.54 billion), iShares iBoxx $ Investment Grade Corporate Bond ETF ($9.69 billion), iShares iBoxx $ High Yield Corporate Bond ETF ($9.22 billion), iShares 20+ Year Treasury Bond ETF ($8.80 billion), Financial Select Sector SPDR Fund ($7.65 billion), and Lumentum Holdings Inc. ($7.23 billion). View all of the most shorted stocks.

Short selling CLDX is an investing strategy that aims to generate trading profit from Celldex Therapeutics as its price is falling. CLDX shares are trading up $0.59 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 Celldex 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 CLDX, 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 CLDX, twice per month. The most recent reporting period available is September, 30 2026.

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

  • 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:CLDX 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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