Comfort Systems USA (FIX) Short Interest Ratio & Short Volume $487.53 -13.80 (-2.75%) Closing price 06/10/2025 03:59 PM EasternExtended Trading$489.38 +1.84 (+0.38%) As of 06/10/2025 07:55 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 Polygon.io. Learn more. Add Compare Share Share Short Interest Stock AnalysisAnalyst ForecastsChartCompetitorsDividendEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestSustainabilityTrendsBuy This Stock Comfort Systems USA Short Interest DataComfort Systems USA (FIX) has a short interest of 1.11 million shares, representing 3.19% of the float (the number of shares available for trading by the public). This marks a 43.13% increase in short interest from the previous month. The short interest ratio (days to cover) is 2.1, indicating that it would take 2.1 days of the average trading volume of 438,096 shares to cover all short positions.Current Short Interest1,110,000 sharesPrevious Short Interest775,500 sharesChange Vs. Previous Month+43.13%Dollar Volume Sold Short$515.91 millionShort Interest Ratio2.1 Days to CoverLast Record DateMay 15, 2025Outstanding Shares35,275,000 sharesFloat Size34,750,000 sharesShort Percent of Float3.19%Today's Trading Volume502,968 sharesAverage Trading Volume438,096 sharesToday's Volume Vs. Average115% Short Selling Comfort Systems USA? Sign up to receive the latest short interest report for Comfort Systems USA and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartFIX Short Interest Over TimeFIX Days to Cover Over TimeFIX Percentage of Float Shorted Over Time Comfort Systems USA Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 5/15/20251,110,000 shares $515.91 million +43.1%3.2%2.1 $464.78 4/30/2025775,500 shares $308.07 million -6.6%2.2%1.4 $397.25 4/15/2025830,300 shares $296.14 million -3.7%2.4%1.4 $356.66 3/31/2025862,100 shares $278.08 million +18.6%2.5%1.5 $322.56 3/15/2025726,700 shares $248.47 million -29.5%2.1%1.4 $341.92 2/28/20251,030,000 shares $372.88 million +38.9%2.9%2.1 $362.02 2/15/2025741,400 shares $290.18 million +2.5%2.1%1.7 $391.40 1/31/2025723,000 shares $317.18 million +8.8%2.1%1.9 $438.70 1/15/2025664,800 shares $327.82 million -10.7%1.9%1.8 $493.11 12/31/2024744,700 shares $315.80 million +17.4%2.1%2.2 $424.06 Get the Latest News and Ratings for FIX and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Comfort Systems USA and its competitors with MarketBeat's FREE daily newsletter. 12/15/2024634,300 shares $293.26 million -2.8%1.8%2 $462.33 11/30/2024652,600 shares $321.91 million -3.9%1.9%2.1 $493.27 11/15/2024679,100 shares $302.21 million +26.7%1.9%2.1 $445.02 10/31/2024536,200 shares $209.55 million +40.3%1.5%1.7 $390.80 10/15/2024382,300 shares $158.16 million -13.7%1.1%1.2 $413.71 9/30/2024442,900 shares $172.92 million -8.7%1.3%1.3 $390.42 9/15/2024485,300 shares $168.75 million -25.5%1.4%1.1 $347.73 8/31/2024651,000 shares $230.14 million +17.6%1.9%1.4 $353.52 8/15/2024553,600 shares $186.81 million +5.7%1.6%1.2 $337.44 7/31/2024523,800 shares $174.14 million -23.3%1.5%1.1 $332.46 7/15/2024683,000 shares $220.41 million -46.6%1.9%1.5 $322.71 6/30/20241,280,000 shares $389.27 million +16.4%3.6%2.8 $304.12 6/15/20241,100,000 shares $345.24 million -7.6%3.1%3.1 $313.85 5/31/20241,190,000 shares $389.51 million -13.1%3.4%3.2 $327.32 5/15/20241,370,000 shares $464.53 million +17.1%3.9%3.4 $339.07 4/30/20241,170,000 shares $361.94 million -4.9%3.3%3 $309.35 4/15/20241,230,000 shares $373.91 million +13.9%3.5%3.4 $303.99 3/31/20241,080,000 shares $343.13 million No Change3.1%3 $317.71 3/15/20241,080,000 shares $333.46 million -16.3%3.1%3.1 $308.76 2/29/20241,290,000 shares $393.57 million +12.2%3.7%3 $305.09 2/15/20241,150,000 shares $290.96 million +15.0%3.3%2.9 $253.01 1/31/2024999,800 shares $217.19 million +1.1%2.9%2.5 $217.23 1/15/2024988,800 shares $201.05 million -10.1%2.8%2.4 $203.33 12/31/20231,100,000 shares $226.24 million -9.1%3.1%2.7 $205.67 12/15/20231,210,000 shares $246.14 million -6.2%3.5%2.9 $203.42 11/30/20231,290,000 shares $249.72 million -1.5%3.7%4 $193.58 11/15/20231,310,000 shares $261.10 million +6.5%3.7%4.2 $199.31 10/31/20231,230,000 shares $223.68 million +35.4%3.5%4.2 $181.85 10/15/2023908,300 shares $144.27 million +4.1%2.6%3.5 $158.84 9/30/2023872,700 shares $148.72 million -1.0%2.5%3.7 $170.41The End of Elon Musk…? 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According to his research, if you listen to the media and miss out on Elon's newest breakthrough, it's going to cost you the fortune of a lifetime.Click here to see why the "End of Elon" crowd is about to be wrong again. 9/15/2023881,300 shares $165.47 million +10.5%2.5%3.9 $187.76 8/31/2023797,500 shares $147.19 million +36.3%2.3%3.5 $184.57 8/15/2023585,100 shares $104.69 million -2.9%1.7%2.6 $178.93 7/31/2023602,500 shares $104.77 million -5.3%1.7%2.7 $173.89 7/15/2023636,300 shares $104.21 million -2.5%1.8%2.5 $163.78 6/30/2023652,700 shares $107.12 million -4.5%1.9%2.5 $164.12 6/15/2023683,500 shares $111.16 million -13.0%2.0%2.5 $162.64 5/31/2023785,300 shares $116.21 million +9.6%2.2%2.8 $147.98 5/15/2023716,800 shares $108.56 million -5.3%2.1%2.4 $151.45 4/30/2023757,200 shares $113.19 million -11.5%2.2%2.6 $149.49 4/15/2023855,400 shares $112.04 million +20.3%2.5%3.3 $130.98 3/31/2023710,800 shares $103.75 million +11.7%2.0%2.7 $145.96 3/15/2023636,100 shares $86.59 million +12.1%1.8%2.7 $136.12 2/28/2023567,600 shares $82.55 million +13.3%1.6%2.6 $145.44 2/15/2023500,800 shares $62.34 million -2.9%1.4%2.5 $124.48 1/31/2023515,800 shares $62.43 million +8.5%1.5%2.7 $121.04 1/15/2023475,600 shares $59.08 million -9.0%1.4%2.3 $124.23 12/30/2022522,500 shares $60.13 million +15.4%1.5%2.6 $115.08 12/15/2022452,900 shares $53.23 million -2.7%1.3%2.2 $117.53 11/30/2022465,500 shares $59.01 million -26.3%1.3%2.3 $126.76 11/15/2022632,000 shares $76.67 million -17.1%1.8%3.3 $121.31 10/31/2022762,600 shares $94.01 million -13.2%2.2%4.3 $123.28 10/15/2022878,700 shares $89.03 million +4.6%2.5%5.2 $101.32 9/30/2022839,900 shares $81.75 million +5.0%2.4%5.3 $97.33 9/15/2022800,000 shares $79.27 million +1.9%2.3%5.2 $99.09 8/31/2022784,800 shares $78.75 million +8.4%2.3%5.1 $100.34 8/15/2022723,800 shares $78.37 million -19.6%2.1%4.6 $108.27 7/31/2022900,700 shares $95.17 million +2.4%2.6%5.7 $105.66 7/15/2022879,700 shares $75.00 million +6.9%2.5%6 $85.26 6/30/2022822,800 shares $68.42 million +30.4%2.3%5.5 $83.15 6/15/2022630,900 shares $52.91 million +9.6%1.8%4.3 $83.87 5/31/2022575,800 shares $51.66 million -14.5%1.6%4 $89.72 5/15/2022673,600 shares $56.65 million +20.1%1.9%4.4 $84.10 4/30/2022560,800 shares $47.34 million -17.2%1.6%3.7 $84.42 4/15/2022677,400 shares $60.00 million +6.7%1.9%4.1 $88.57 3/31/2022635,100 shares $56.53 million -10.5%1.8%3.6 $89.01 3/15/2022709,600 shares $64.66 million +8.9%2.0%4.2 $91.12 2/28/2022651,600 shares $56.02 million +8.0%1.9%3.8 $85.98 2/15/2022603,300 shares $54.03 million -1.1%1.7%3.6 $89.55 1/31/2022609,800 shares $54.75 million +18.5%1.7%3.9 $89.78 1/15/2022514,800 shares $49.90 million -12.8%1.5%3.4 $96.94 12/31/2021590,200 shares $58.39 million -5.1%1.7%4.2 $98.94 12/15/2021622,000 shares $61.40 million +19.4%1.8%4.3 $98.72 11/30/2021521,100 shares $49.44 million -16.8%1.5%3.8 $94.87 11/15/2021626,300 shares $63.04 million -12.7%1.8%4.7 $100.65 10/29/2021717,600 shares $65.64 million -2.0%2.1%5.4 $91.47 10/15/2021732,000 shares $58.84 million +2.9%2.1%5.5 $80.38 9/30/2021711,200 shares $50.72 million -5.0%2.0%5.5 $71.32 9/15/2021748,500 shares $52.75 million +2.5%2.1%5.1 $70.48 8/31/2021730,300 shares $55.49 million +3.1%2.1%4.8 $75.98Elon’s backup plan for AI (Ad)Elon knows the future isn’t about smarter AI — it’s about powering it. And this new technology is quietly becoming one of the most profitable stories of the year.Chris Rowe just shared the full details in a live presentation… Watch it here before it comes down. 8/13/2021708,100 shares $54.01 million +14.6%2.0%4.2 $76.28 7/30/2021617,900 shares $46.19 million +0.7%1.8%3.5 $74.75 7/15/2021613,800 shares $46.23 million +17.4%1.7%3.4 $75.32 6/30/2021522,800 shares $41.19 million -23.6%1.5%2.7 $78.79 6/15/2021684,000 shares $57.19 million +15.4%1.9%3.7 $83.61 5/28/2021592,900 shares $49.15 million -17.6%1.7%3.2 $82.90 5/14/2021719,300 shares $59.06 million +16.6%2.0%3.4 $82.11 4/30/2021617,000 shares $50.71 million -1.9%1.8%2.8 $82.19 4/15/2021628,700 shares $50.30 million -3.9%1.8%2.7 $80.01 3/31/2021654,300 shares $49.20 million -23.2%1.9%2.7 $75.20 3/15/2021852,400 shares $63.64 million -14.8%2.4%3.4 $74.66 2/26/20211,000,000 shares $62.62 million -1.0%2.8%4.2 $62.62 2/12/20211,010,000 shares $64.70 million -9.8%2.9%4.5 $64.06 1/29/20211,120,000 shares $63.25 million +17.1%3.2%4.8 $56.47 1/15/2021956,600 shares $52.84 million -5.3%2.7%3.8 $55.24 12/31/20201,010,000 shares $53.22 million +24.1%2.9%4.2 $52.69 12/15/2020814,100 shares $41.80 million +48.8%2.3%3.3 $51.34 11/30/2020547,100 shares $28.13 million -25.5%1.5%2.1 $51.42 11/15/2020734,000 shares $36.95 million +4.1%2.1%2.7 $50.34 10/30/2020705,300 shares $31.51 million +2.5%2.0%2.6 $44.68 10/15/2020687,900 shares $38.36 million -3.5%1.9%2.5 $55.77 9/30/2020712,700 shares $36.71 million -6.8%2.0%2.6 $51.51 9/15/2020765,000 shares $38.98 million -2.9%2.2%2.7 $50.96 8/31/2020787,500 shares $39.90 million -2.7%2.2%2.8 $50.67 8/14/2020809,700 shares $42.94 million -5.9%2.3%2.9 $53.03 7/31/2020860,100 shares $42.76 million -4.5%2.4%3 $49.71 7/15/2020901,000 shares $36.54 million -0.1%2.5%3.3 $40.56 6/30/2020902,000 shares $36.10 million -1.7%2.5%3 $40.02 6/15/2020917,100 shares $34.60 million +8.8%2.6%2.9 $37.73 FIX Short Interest - Frequently Asked Questions What is Comfort Systems USA's current short interest? Short interest is the volume of Comfort Systems USA shares that have been sold short but have not yet been closed out or covered. As of May 15th, investors have sold 1,110,000 shares of FIX short. 3.19% of Comfort Systems USA's shares are currently sold short. Learn More on Comfort Systems USA's current short interest. What is a good short interest ratio for Comfort Systems USA? 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. FIX shares currently have a short interest ratio of 2.0. Learn More on Comfort Systems USA's short interest ratio. Which institutional investors are shorting Comfort Systems USA? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Comfort Systems USA: Quaker Wealth Management LLC, Jane Street Group LLC, Cubist Systematic Strategies LLC, Twin Tree Management LP, PEAK6 LLC, Jane Street Group LLC, Walleye Trading LLC, Walleye Capital LLC, Arrowpoint Investment Partners Singapore Pte. Ltd., and Simplex Trading LLC. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission. What is a good short interest percentage for Comfort Systems USA? 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. 3.19% of Comfort Systems USA's floating shares are currently sold short. Is Comfort Systems USA's short interest increasing or decreasing? Comfort Systems USA saw a increase in short interest in May. As of May 15th, there was short interest totaling 1,110,000 shares, an increase of 43.1% from the previous total of 775,500 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. What is Comfort Systems USA's float size? Comfort Systems USA currently has issued a total of 35,275,000 shares. Some of Comfort Systems USA's outstanding shares are available for trading, while others are subject to various restrictions. The public float, also referred to as floating shares or "the float", are shares that publicly owned, unrestricted and available to trade on the open market. Comfort Systems USA currently has a public float of 34,750,000 shares. How does Comfort Systems USA's short interest compare to its competitors? 3.19% of Comfort Systems USA's shares are currently sold short. Here is how the short interest of companies compare to Comfort Systems USA: Quanta Services, Inc. (3.52%), EMCOR Group, Inc. (3.17%), AECOM (2.10%), MasTec, Inc. (2.39%), Fluor Co. (5.53%), KBR, Inc. (2.84%), Dycom Industries, Inc. (2.91%), Sterling Infrastructure, Inc. (10.45%), Primoris Services Co. (5.65%), Granite Construction Incorporated (9.91%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: Invesco QQQ ($29.20 billion), Strategy Incorporated ($10.88 billion), iShares 20+ Year Treasury Bond ETF ($10.04 billion), Capital One Financial Co. ($5.51 billion), Charter Communications, Inc. ($5.00 billion), Super Micro Computer, Inc. ($4.43 billion), Apollo Global Management, Inc. ($4.02 billion), Hims & Hers Health, Inc. ($3.65 billion), VanEck Semiconductor ETF ($3.27 billion), and Coinbase Global, Inc. ($3.10 billion). View all of the most shorted stocks. What does it mean to sell short Comfort Systems USA stock? Short selling FIX is an investing strategy that aims to generate trading profit from Comfort Systems USA as its price is falling. FIX shares are trading down $13.80 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. How does a short squeeze work against Comfort Systems USA? A short squeeze for Comfort Systems USA 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 FIX, which in turn drives the price of the stock up even further. How often is Comfort Systems USA's short interest reported? Short interest is typically published by a stock exchange once per month. However, NASDAQ publishes a report for U.S. stocks, including FIX, twice per month. The most recent reporting period available is May, 15 2025. More Short Interest Resources from MarketBeat Related Companies PWR Short Squeeze EME Short Squeeze ACM Short Squeeze MTZ Short Squeeze FLR Short Squeeze KBR Short Squeeze DY Short Squeeze STRL Short Squeeze PRIM Short Squeeze GVA Short Squeeze Short Interest Tools Stocks to Short Largest Short Interest Positions Short Interest Increases Short Interest Decreases Short Interest Reporting Dates This page (NYSE:FIX) was last updated on 6/11/2025 by MarketBeat.com Staff From Our PartnersTrump wipes out trillions overnight…Is there anybody more powerful than Donald Trump right now? In a single tariff announcement, he wiped out n...Porter & Company | SponsoredElon’s NEXT Big IPO?Cancel your internet TODAY!? 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