Pulmatrix (PULM) Short Interest Ratio & Short Volume $5.40 -0.56 (-9.40%) Closing price 04/4/2025 03:59 PM EasternExtended Trading$5.42 +0.02 (+0.46%) As of 04/4/2025 07:16 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 AnalysisChartCompetitorsEarningsFinancialsHeadlinesOwnershipSEC FilingsShort InterestTrendsBuy This Stock Pulmatrix Short Interest DataPulmatrix (PULM) has a short interest of 37,900 shares, representing 1.04% of the float (the number of shares available for trading by the public). This marks a 9.54% increase in short interest from the previous month. The short interest ratio (days to cover) is 1.1, indicating that it would take 1.1 days of the average trading volume of 132,655 shares to cover all short positions.Current Short Interest37,900 sharesPrevious Short Interest34,600 sharesChange Vs. Previous Month+9.54%Dollar Volume Sold Short$320,634.00Short Interest Ratio1.1 Days to CoverLast Record DateMarch 15, 2025Outstanding Shares3,650,000 sharesFloat Size3,650,000 sharesShort Percent of Float1.04%Today's Trading Volume36,849 sharesAverage Trading Volume132,655 sharesToday's Volume Vs. Average28% Short Selling Pulmatrix? Sign up to receive the latest short interest report for Pulmatrix and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartPULM Short Interest Over TimePULM Days to Cover Over TimePULM Percentage of Float Shorted Over Time Remove Ads Pulmatrix Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 3/15/202537,900 shares $320,634.00 +9.5%1.0%1.1 $8.46 2/28/202534,600 shares $279,568.00 -10.4%1.0%0.7 $8.08 2/15/202538,600 shares $298,378.00 -27.0%1.1%0.5 $7.73 1/31/202552,900 shares $407,330.00 +10.9%1.5%0.1 $7.70 1/15/202547,700 shares $283,338.00 +20.8%1.3%0.1 $5.94 12/31/202439,500 shares $275,710.00 -47.3%1.1%0.1 $6.98 12/15/202474,900 shares $430,675.00 +27.8%2.1%0.2 $5.75 11/30/202458,600 shares $389,104.00 -85.8%1.6%0.1 $6.64 11/15/2024411,600 shares $2.70 million +5,697.2%11.3%1 $6.56 10/31/20247,100 shares $15,620.00 +9.2%0.2%0.6 $2.20 Get the Latest News and Ratings for PULM and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Pulmatrix and its competitors with MarketBeat's FREE daily newsletter. 10/15/20246,500 shares $13,585.00 +27.5%0.2%0.6 $2.09 9/30/20245,100 shares $10,914.00 -20.3%0.1%0.5 $2.14 9/15/20246,400 shares $12,864.00 +25.5%0.2%0.5 $2.01 8/31/20245,100 shares $10,557.00 -37.0%0.1%0.5 $2.07 8/15/20248,100 shares $17,241.66 -31.4%0.2%0.7 $2.13 7/31/202411,800 shares $25,606.00 +126.9%0.3%1.1 $2.17 7/15/20245,200 shares $10,680.80 +372.7%0.1%0.5 $2.05 6/30/20241,100 shares $2,123.00 +120.0%0.0%0.1 $1.93 6/15/2024500 shares $958.85 -77.3%0.0%0 $1.92 5/31/20242,200 shares $4,114.00 +450.0%0.1%0.2 $1.87 5/15/2024400 shares $732.00 -86.2%0.0%0 $1.83 4/30/20242,900 shares $5,510.29 -74.8%0.1%0.2 $1.90 4/15/202411,500 shares $24,035.00 +325.9%0.3%0.7 $2.09 3/31/20242,700 shares $4,725.00 +575.0%0.1%0.2 $1.75 3/15/2024400 shares $672.00 -97.4%0.0%0 $1.68 2/29/202415,300 shares $30,447.00 +91.3%0.4%0.9 $1.99 2/15/20248,000 shares $14,720.00 +27.0%0.2%0.4 $1.84 1/31/20246,300 shares $10,899.00 +350.0%0.2%0.4 $1.73 1/15/20241,400 shares $2,741.20 -68.2%0.0%0.1 $1.96 12/31/20234,400 shares $8,184.00 -44.3%0.1%0.3 $1.86 12/15/20237,900 shares $14,931.00 +27.4%0.2%0.6 $1.89 11/30/20236,200 shares $12,772.00 +195.2%0.2%0.6 $2.06 11/15/20232,100 shares $3,780.00 -38.2%0.1%0.2 $1.80 10/31/20233,400 shares $6,426.00 -12.8%0.1%0.3 $1.89 10/15/20233,900 shares $7,927.92 -20.4%0.1%0.3 $2.03 9/30/20234,900 shares $9,947.00 +14.0%0.1%0.4 $2.03 9/15/20234,300 shares $9,847.00 +59.3%0.1%0.3 $2.29 8/31/20232,700 shares $6,345.00 -20.6%0.1%0.2 $2.35 8/15/20233,400 shares $8,551.00 +88.9%0.1%0.2 $2.52 7/31/20231,800 shares $4,770.00 -45.5%0.1%0.1 $2.65Elon Musk Confirms: Tesla’s Optimus is Replacing Workers… and Heading to Mars (Ad)Musk confirmed that SpaceX's Starship will carry Optimus to Mars in 2026 as part of an autonomous mission to help build human colonies on the Red Planet. And here on Earth? Optimus is about to change everything.There's no time to waste. As far as I can tell, the best way to profit from this project is to make 7/15/20233,300 shares $8,943.00 -41.1%0.1%0.2 $2.71 6/30/20235,600 shares $15,008.00 -47.2%0.2%0.4 $2.68 6/15/202310,600 shares $29,362.00 +120.8%0.3%0.7 $2.77 5/31/20234,800 shares $13,102.56 +29.7%0.1%0.3 $2.73 5/15/20233,700 shares $9,953.00 +184.6%0.1%0.2 $2.69 4/30/20231,300 shares $3,821.22 -55.2%0.0%0.1 $2.94 4/15/20232,900 shares $8,613.00 No Change0.1%0.1 $2.97 3/31/20232,900 shares $8,468.00 -64.2%0.1%0.1 $2.92 3/15/20238,100 shares $25,272.00 -13.8%0.2%0.2 $3.12 2/28/20239,400 shares $32,427.18 -36.5%0.3%0.2 $3.45 2/15/202314,800 shares $55,500.00 -56.7%0.4%0.4 $3.75 1/31/202334,200 shares $137,826.00 -24.7%0.9%0.9 $4.03 1/15/202345,400 shares $196,582.00 +17.0%1.3%1.2 $4.33 12/30/202238,800 shares $150,544.00 -7.2%1.1%1 $3.88 12/15/202241,800 shares $156,332.00 +3.0%1.2%2 $3.74 11/30/202240,600 shares $151,844.00 -21.2%1.1%1.7 $3.74 11/15/202251,500 shares $201,880.00 -1.9%1.4%0.6 $3.92 10/31/202252,500 shares $180,600.00 -19.9%1.6%0.6 $3.44 10/15/202265,500 shares $235,145.00 -24.2%1.9%0.5 $3.59 9/30/202286,400 shares $308,448.00 -17.2%2.6%0.7 $3.57 9/15/2022104,400 shares $463,536.00 -28.4%3.1%0.8 $4.44 8/31/2022145,700 shares $643,994.00 +840.0%4.3%1.2 $4.42 8/15/202215,500 shares $73,625.00 -1.3%0.5%0.2 $4.75 7/31/202215,700 shares $69,080.00 +36.5%0.5%0.3 $4.40 7/15/202211,500 shares $52,440.00 +6.5%0.3%0.7 $4.56 6/30/202210,800 shares $49,572.00 -44.0%0.3%0.7 $4.59 6/15/202219,300 shares $85,692.00 +10.3%0.6%1 $4.44 5/31/202217,500 shares $94,500.00 -23.3%0.5%0.6 $5.40 5/15/202222,800 shares $117,192.00 -17.7%0.7%0.5 $5.14 4/30/202227,700 shares $141,547.00 -74.4%0.8%0.6 $5.11 4/15/2022108,000 shares $640,440.00 -20.0%3.3%2.1 $5.93 3/31/2022135,000 shares $922,050.00 +40.5%4.1%2.5 $6.83 3/15/202296,100 shares $580,444.00 +359.8%3.0%1.4 $6.04 2/28/202220,900 shares $129,162.00 -92.1%0.6%0.3 $6.18 2/15/2022265,900 shares $96,787.60 -20.7%N/A0.2 $0.36 1/31/2022335,400 shares $132,483.00 -23.1%N/A0.3 $0.40 1/15/2022436,400 shares $174,123.60 -80.6%0.8%0.4 $0.40 12/31/20212,250,000 shares $985,500.00 +162.2%4.1%2 $0.44 12/15/2021858,100 shares $416,178.50 -16.7%1.6%0.9 $0.49 11/30/20211,030,000 shares $687,010.00 -20.2%1.9%1.9 $0.67 11/15/20211,290,000 shares $1.05 million +1.6%2.3%2.5 $0.81 10/29/20211,270,000 shares $1.10 million +9.5%2.3%2.7 $0.87 10/15/20211,160,000 shares $842,160.00 -4.9%2.1%4.3 $0.73 9/30/20211,220,000 shares $976,000.00 +6.1%2.2%4 $0.80 9/15/20211,150,000 shares $888,950.00 +9.5%2.1%3.5 $0.77 8/31/20211,050,000 shares $860,895.00 +13.8%1.9%2.8 $0.82 8/13/2021922,900 shares $719,862.00 +13.7%1.7%2 $0.78 7/30/2021811,900 shares $685,893.12 +28.4%1.5%1.5 $0.84 7/15/2021632,500 shares $548,567.25 -14.3%1.1%1 $0.87 6/30/2021737,600 shares $767,104.00 -2.1%1.3%0.9 $1.04Elon Musk Confirms: Tesla’s Optimus is Replacing Workers… and Heading to Mars (Ad)Musk confirmed that SpaceX's Starship will carry Optimus to Mars in 2026 as part of an autonomous mission to help build human colonies on the Red Planet. And here on Earth? Optimus is about to change everything.There's no time to waste. As far as I can tell, the best way to profit from this project is to make 6/15/2021753,400 shares $768,468.00 -9.3%1.4%0.9 $1.02 5/28/2021830,600 shares $772,873.30 -17.8%1.5%0.8 $0.93 5/14/20211,010,000 shares $839,108.00 -8.2%N/A0.7 $0.83 4/30/20211,100,000 shares $1.11 million +39.4%N/A0.4 $1.01 4/15/2021788,900 shares $812,567.00 -37.9%N/A0.3 $1.03 3/31/20211,270,000 shares $1.65 million -8.6%N/A0.5 $1.30 3/15/20211,390,000 shares $2.10 million +3.7%N/A0.5 $1.51 2/26/20211,340,000 shares $2.18 million +28.9%N/A0.6 $1.63 2/12/20211,040,000 shares $2.09 million +1,014.7%N/A0.5 $2.01 1/29/202193,300 shares $137,151.00 +148.1%N/A0.1 $1.47 1/15/202137,600 shares $47,752.00 -83.7%N/A0.1 $1.27 12/31/2020230,900 shares $277,080.00 +162.4%N/A0.4 $1.20 12/15/202088,000 shares $116,160.00 -66.3%N/A0.2 $1.32 11/30/2020261,400 shares $334,592.00 +187.9%N/A0.6 $1.28 11/15/202090,800 shares $103,512.00 -73.9%N/A0.2 $1.14 10/30/2020348,100 shares $362,024.00 +56.7%N/A0.8 $1.04 10/15/2020222,100 shares $257,636.00 +87.7%N/A0.4 $1.16 9/30/2020118,300 shares $140,777.00 +20.8%N/A0.2 $1.19 9/15/202097,900 shares $116,501.00 -6.1%N/A0.1 $1.19 8/31/2020104,300 shares $111,601.00 -53.7%N/A0.1 $1.07 8/14/2020225,100 shares $263,367.00 -59.7%N/A0.3 $1.17 7/31/2020558,800 shares $737,616.00 +61.7%N/A0.6 $1.32 7/15/2020345,600 shares $463,104.00 -79.4%N/A0.3 $1.34 6/30/20201,680,000 shares $2.89 million +22.6%N/A1.4 $1.72 6/15/20201,370,000 shares $2.11 million -8.7%N/A1.2 $1.54 5/29/20201,500,000 shares $2.57 million -20.6%N/A1.4 $1.71 5/15/20201,890,000 shares $2.87 million +43.2%N/A1.7 $1.52 4/30/20201,320,000 shares $1.82 million -19.0%7.1%1.3 $1.38 4/15/20201,630,000 shares $2.72 million +52.3%N/A1.7 $1.67 PULM Short Interest - Frequently Asked Questions What is Pulmatrix's current short interest? Short interest is the volume of Pulmatrix shares that have been sold short but have not yet been closed out or covered. As of March 15th, traders have sold 37,900 shares of PULM short. 1.04% of Pulmatrix's shares are currently sold short. Learn More on Pulmatrix's current short interest. What is a good short interest ratio for Pulmatrix? 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. PULM shares currently have a short interest ratio of 1.0. Learn More on Pulmatrix's short interest ratio. Which institutional investors are shorting Pulmatrix? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Pulmatrix: Concourse Financial Group Securities Inc.. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission. What is a good short interest percentage for Pulmatrix? 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. 1.04% of Pulmatrix's floating shares are currently sold short. Is Pulmatrix's short interest increasing or decreasing? Pulmatrix saw a increase in short interest in the month of March. As of March 15th, there was short interest totaling 37,900 shares, an increase of 9.5% from the previous total of 34,600 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 Pulmatrix's float size? Pulmatrix currently has issued a total of 3,650,000 shares. Some of Pulmatrix'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. Pulmatrix currently has a public float of 3,650,000 shares. How does Pulmatrix's short interest compare to its competitors? 1.04% of Pulmatrix's shares are currently sold short. Here is how the short interest of companies in the industry of "pharmaceutical products" compare to Pulmatrix: Editas Medicine, Inc. (16.24%), Telomir Pharmaceuticals, Inc. (11.30%), Coherus BioSciences, Inc. (30.41%), Vaxart, Inc. (5.52%), OptiNose, Inc. (3.44%), Anixa Biosciences, Inc. (1.29%), Adverum Biotechnologies, Inc. (11.52%), Fate Therapeutics, Inc. (13.47%), Black Diamond Therapeutics, Inc. (13.89%), OncoCyte Co. (2.53%), 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 ($26.28 billion), iShares 20+ Year Treasury Bond ETF ($9.53 billion), MicroStrategy Incorporated ($8.50 billion), Apollo Global Management, Inc. ($4.86 billion), Super Micro Computer, Inc. ($4.85 billion), Charter Communications, Inc. ($4.28 billion), Capital One Financial Co. ($4.08 billion), AppLovin Co. ($3.82 billion), Canadian Natural Resources Limited ($3.78 billion), and Schlumberger Limited ($2.87 billion). View all of the most shorted stocks. What does it mean to sell short Pulmatrix stock? Short selling PULM is an investing strategy that aims to generate trading profit from Pulmatrix as its price is falling. PULM shares are trading down $0.56 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 Pulmatrix? A short squeeze for Pulmatrix 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 PULM, which in turn drives the price of the stock up even further. How often is Pulmatrix'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 PULM, twice per month. The most recent reporting period available is March, 15 2025. More Short Interest Resources from MarketBeat Related Companies EDIT Short Interest Data TELO Short Interest Data CHRS Short Interest Data VXRT Short Interest Data OPTN Short Interest Data ANIX Short Interest Data ADVM Short Interest Data FATE Short Interest Data BDTX Short Interest Data OCX Short Interest Data Short Interest Tools Stocks to Short Largest Short Interest Positions Short Interest Increases Short Interest Decreases Short Interest Reporting Dates This page (NASDAQ:PULM) was last updated on 4/6/2025 by MarketBeat.com Staff From Our PartnersFeds Just Admitted It—They Can Take Your CashThe Government Just Said Your Money Isn't Yours That's right—According to the DOJ, YOUR hard-earned money i...Priority Gold | SponsoredYour Retirement Is Caught in the CrossfireWhen Trump took office in 2017, gold was just $1,100 an ounce. 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