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Casella Waste Systems (CWST) Short Interest Ratio & Short Volume

Casella Waste Systems logo
$90.72 -0.31 (-0.34%)
Closing price 08/14/2026 04:00 PM Eastern
Extended Trading
$91.50 +0.78 (+0.86%)
As of 08/14/2026 07:37 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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Casella Waste Systems Short Interest Overview

As of July 31, 2026, Casella Waste Systems (CWST) had a short interest of 4.68 million shares sold short, representing 7.65% of the public float. This marks a -4.56% decrease in short interest since the prior report. The short interest ratio (days to cover) is 6.4, meaning it would take 6.4 days of the average trading volume of 659,039 shares to cover all short positions.

Current Short Interest
4,680,761 shares
Previous Short Interest
4,904,523 shares
Change Vs. Previous Month
-4.56%
Dollar Volume Sold Short
$419.91 million
Short Interest Ratio
6.4 Days to Cover
Last Record Date
July 31, 2026
Outstanding Shares
63,640,000 shares
Short Percent of Float
7.65%
Today's Trading Volume
241,944 shares
Average Trading Volume
659,039 shares
Today's Volume Vs. Average
37%
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Short Interest ChartDays to Cover ChartShort Percent of Float Chart

CWST Short Interest Over Time

CWST Days to Cover Over Time

CWST Percentage of Float Shorted Over Time

Casella Waste Systems 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
7/31/20264,680,761 shares $419.91 million -4.6%7.6%6.41 $89.71
7/15/20264,904,523 shares $472.35 million +6.8%8.0%8.04 $96.31
6/30/20264,591,558 shares $445.47 million +3.4%7.5%4.94 $97.02
6/15/20264,442,757 shares $391.41 million -2.5%7.3%7.55 $88.10
5/29/20264,556,388 shares $374.40 million +12.9%7.4%7.48 $82.17
5/15/20264,036,892 shares $343.86 million +1.0%6.6%5.07 $85.18
4/30/20263,995,632 shares $316.65 million -4.3%6.5%4.65 $79.25
4/15/20264,174,053 shares $340.35 million +1.4%6.8%4.82 $81.54
3/31/20264,115,432 shares $326.52 million +0.2%6.7%5.19 $79.34
3/13/20264,106,391 shares $361.73 million +14.0%6.7%4.08 $88.09
2/27/20263,602,775 shares $335.63 million -12.5%5.9%3.88 $93.16
2/13/20264,114,877 shares $426.80 million +3.9%6.7%7.01 $103.72
1/30/20263,961,344 shares $399.62 million -10.1%6.5%6.95 $100.88
1/15/20264,405,712 shares $461.67 million -4.7%7.2%7.07 $104.79
12/31/20254,621,943 shares $452.67 million +27.7%7.6%2.51 $97.94
12/15/20253,619,789 shares $363.68 million +15.2%5.9%3.66 $100.47
11/28/20253,142,507 shares $303.03 million +10.6%5.1%5.5 $96.43
11/14/20252,842,430 shares $253.54 million -3.1%4.7%4.65 $89.20
10/31/20252,931,847 shares $259.67 million -4.8%4.8%4.9 $88.57
10/15/20253,080,000 shares $267.99 million +14.5%5.0%5.5 $87.01
9/30/20252,690,000 shares $254.84 million +3.5%N/A4.9 $94.74
9/15/20252,600,000 shares $234.68 million +3.2%N/A5 $90.26
8/31/20252,520,000 shares $248.37 million +21.7%4.1%5.3 $98.56
8/15/20252,070,000 shares $205.63 million +24.7%N/A4.5 $99.34
7/31/20251,660,000 shares $180.49 million -19.0%2.7%3.6 $108.73
7/15/20252,050,000 shares $225.60 million -7.7%N/A4.7 $110.05
6/30/20252,220,000 shares $256.14 million -3.9%3.6%4.6 $115.38
6/15/20252,310,000 shares $272.05 million -4.2%3.8%4.6 $117.77
5/31/20252,410,000 shares $281.80 million +1.3%4.0%4.7 $116.93
5/15/20252,380,000 shares $270.20 million -4.4%3.9%4.6 $113.53
4/30/20252,490,000 shares $292.45 million +1.6%N/A5 $117.45
4/15/20252,450,000 shares $289.20 million +33.2%4.0%5.2 $118.04
3/31/20251,840,000 shares $205.18 million -0.5%3.0%4.5 $111.51
3/15/20251,850,000 shares $198.88 million +23.3%3.1%5.3 $107.50
2/28/20251,500,000 shares $168.03 million -10.2%2.5%4.4 $112.02
2/15/20251,670,000 shares $185.97 million -7.2%2.8%5.3 $111.36
1/31/20251,800,000 shares $193.57 million +3.5%N/A6 $107.54
1/15/20251,740,000 shares $195.07 million -22.7%N/A5.8 $112.11
12/31/20242,250,000 shares $238.07 million +10.8%N/A7.3 $105.81
12/15/20242,030,000 shares $215.30 million -4.7%N/A6.3 $106.06
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11/30/20242,130,000 shares $241.14 million +7.6%N/A5.6 $113.21
11/15/20241,980,000 shares $210.97 million -1.0%N/A5.3 $106.55
10/31/20242,000,000 shares $195.76 million +11.7%N/A5.7 $97.88
10/15/20241,790,000 shares $185.96 million -19.0%N/A4.8 $103.89
9/30/20242,210,000 shares $219.87 million +0.9%N/A5.8 $99.49
9/15/20242,190,000 shares $236.65 million -0.9%N/A5.8 $108.06
8/31/20242,210,000 shares $238.37 million +0.5%N/A7.4 $107.86
8/15/20242,200,000 shares $231.84 million -2.7%N/A6.9 $105.38
7/31/20242,260,000 shares $234.05 million -4.2%N/A7 $103.56
7/15/20242,360,000 shares $248.41 million +4.4%N/A8.3 $105.26
6/30/20242,260,000 shares $224.24 million +11.9%N/A8.6 $99.22
6/15/20242,020,000 shares $194.69 million +2.5%N/A7.8 $96.38
5/31/20241,970,000 shares $198.16 million +11.9%N/A7.6 $100.59
5/15/20241,760,000 shares $171.79 million +13.6%N/A6.9 $97.61
4/30/20241,550,000 shares $140.12 million -4.9%N/A5.4 $90.40
4/15/20241,630,000 shares $155.89 million -1.2%N/A5.7 $95.64
3/31/20241,650,000 shares $163.14 million +1.2%N/A5.7 $98.87
3/15/20241,630,000 shares $156.59 million +9.4%N/A5.6 $96.07
2/29/20241,490,000 shares $134.25 million -6.9%N/A5 $90.10
2/15/20241,600,000 shares $148.48 million +0.6%N/A5.5 $92.80
1/31/20241,590,000 shares $135.69 million +1.3%N/A5.9 $85.34
1/15/20241,570,000 shares $134.42 million +2.6%N/A5.6 $85.62
12/31/20231,530,000 shares $130.75 million -5.6%N/A5.4 $85.46
12/15/20231,620,000 shares $140.02 million +10.2%N/A5.6 $86.43
11/30/20231,470,000 shares $118.89 million -3.9%N/A5.1 $80.88
11/15/20231,530,000 shares $125.37 million +4.8%N/A5.4 $81.94
10/31/20231,460,000 shares $110.16 million +4.3%N/A5 $75.45
10/15/20231,400,000 shares $108.14 million No ChangeN/A4.6 $77.24
9/30/20231,400,000 shares $106.82 million +13.8%N/A4.7 $76.30
9/15/20231,230,000 shares $102.53 million -5.4%N/A4.1 $83.36
8/31/20231,300,000 shares $102.40 million +11.1%N/A3.5 $78.77
8/15/20231,170,000 shares $92.98 million +13.6%N/A3.2 $79.47
7/31/20231,030,000 shares $83.11 million +1.0%N/A2.9 $80.69
7/15/20231,020,000 shares $88.67 million -1.0%N/A3.1 $86.93
6/30/20231,030,000 shares $93.16 million -32.2%N/A3.2 $90.45
6/15/20231,520,000 shares $131.89 million +3.4%3.0%5 $86.77
5/31/20231,470,000 shares $132.54 million -7.0%2.9%6.5 $90.16
5/15/20231,580,000 shares $150.91 million +6.8%3.2%6.4 $95.51
4/30/20231,480,000 shares $131.72 million +6.5%3.0%5.5 $89.00
4/15/20231,390,000 shares $117.43 million -0.7%2.8%5.3 $84.48
3/31/20231,400,000 shares $115.72 million +0.7%2.8%5.3 $82.66
3/15/20231,390,000 shares $113.31 million +19.8%2.8%5.4 $81.52
2/28/20231,160,000 shares $90.27 million +6.4%2.3%5.1 $77.82
2/15/20231,090,000 shares $87.91 million -3.5%2.2%5.1 $80.65
1/31/20231,130,000 shares $90.54 million +2.7%2.3%6.3 $80.12
1/15/20231,100,000 shares $85.55 million -5.2%2.2%6.1 $77.77
12/30/20221,160,000 shares $92.00 million -5.7%2.3%6.2 $79.31
12/15/20221,230,000 shares $100.47 million +9.8%2.5%6.1 $81.68
11/30/20221,120,000 shares $96.42 million +0.9%2.2%5.5 $86.09
11/15/20221,110,000 shares $88.66 million -11.9%2.2%5.3 $79.87
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10/31/20221,260,000 shares $103.08 million -12.5%2.5%6.2 $81.81
10/15/20221,440,000 shares $106.56 million +6.7%2.9%7 $74.00
9/30/20221,350,000 shares $103.13 million +6.3%2.7%6.6 $76.39
9/15/20221,270,000 shares $104.71 million +2.4%2.6%6.6 $82.45
8/31/20221,240,000 shares $101.59 million -3.9%2.5%6.1 $81.93
8/15/20221,290,000 shares $110.86 million +5.7%2.6%6.3 $85.94
7/31/20221,220,000 shares $98.76 million +6.1%2.5%5.4 $80.95
7/15/20221,150,000 shares $84.10 million +13.9%2.3%4.9 $73.13
6/30/20221,010,000 shares $73.41 million -9.0%2.0%4.3 $72.68
6/15/20221,110,000 shares $73.59 million +1.8%2.2%4.5 $66.30
5/31/20221,090,000 shares $78.02 million +14.8%2.2%3.6 $71.58
5/15/2022949,200 shares $66.72 million -3.0%1.9%2.6 $70.29
4/30/2022978,700 shares $80.49 million +3.8%2.0%2.7 $82.24
4/15/2022943,100 shares $82.91 million +13.2%1.9%2.7 $87.91
3/31/2022833,200 shares $73.03 million -57.5%1.7%2.4 $87.65
3/15/20221,960,000 shares $172.28 million +206.6%4.0%5.7 $87.90
2/28/2022639,200 shares $48.20 million +6.7%1.3%2.2 $75.40
2/15/2022599,300 shares $44.28 million +26.6%1.2%2.6 $73.89
1/31/2022473,400 shares $35.97 million -13.7%1.0%2.2 $75.98
1/15/2022548,700 shares $41.87 million +10.1%1.1%2.6 $76.31
12/31/2021498,300 shares $42.56 million -14.2%1.0%2.5 $85.42
12/15/2021580,500 shares $48.65 million +6.0%1.2%3 $83.80
11/30/2021547,700 shares $46.43 million -12.4%1.1%2.8 $84.78
11/15/2021625,000 shares $54.29 million -21.1%1.3%3.3 $86.87
10/29/2021792,500 shares $68.73 million -3.4%1.6%4.1 $86.72
10/15/2021820,500 shares $65.64 million -8.0%1.7%4 $80.00
9/30/2021892,200 shares $67.75 million +3.0%1.8%4.4 $75.94
9/15/2021866,300 shares $65.43 million +1.7%1.8%4.3 $75.53
8/31/2021851,500 shares $63.00 million +8.2%1.7%4.5 $73.99

CWST Short Interest - Frequently Asked Questions

Short interest is the volume of Casella Waste Systems shares that have been sold short but have not yet been covered or closed out. As of July 31st, investors have sold 4,680,761 shares of CWST short. 7.65% of Casella Waste Systems' shares are currently sold short. Learn More on Casella Waste Systems' 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. CWST shares currently have a short interest ratio of 6.4. Learn More on Casella Waste Systems'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. 7.65% of Casella Waste Systems' floating shares are currently sold short.

Casella Waste Systems saw a decline in short interest during the month of July. As of July 31st, there was short interest totaling 4,680,761 shares, a decline of 4.6% from the previous total of 4,904,523 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.

7.65% of Casella Waste Systems' shares are currently sold short. Here is how the short interest of companies in the industry of "commercial services & supplies" compare to Casella Waste Systems: Republic Services, Inc. (1.25%), Waste Connections, Inc. (1.28%), Rollins, Inc. (4.22%), Clean Harbors, Inc. (2.61%), GFL Environmental Inc. (6.15%), Rentokil Initial PLC (0.57%), Tetra Tech, Inc. (4.64%), ABM Industries Incorporated (3.35%), BrightView Holdings, Inc. (4.06%), Enviri Corporation (8.62%),

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 CWST is an investing strategy that aims to generate trading profit from Casella Waste Systems as its price is falling. CWST shares are trading down $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 Casella Waste Systems 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 CWST, 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 CWST, 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 CWST:

  • 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 data for NASDAQ:CWST 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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