Pulmonx (LUNG) Short Interest Ratio & Short Volume $1.71 -0.05 (-2.84%) Closing price 08/29/2025 04:00 PM EasternExtended Trading$1.71 +0.00 (+0.23%) As of 08/29/2025 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 AnalysisAnalyst ForecastsChartCompetitorsEarningsFDA EventsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock Pulmonx Short Interest DataPulmonx (LUNG) has a short interest of 1.37 million shares, representing 3.61% of the float (the number of shares available for trading by the public). This marks a -4.86% decrease in short interest from the previous month. The short interest ratio (days to cover) is 2.6, indicating that it would take 2.6 days of the average trading volume of 856,319 shares to cover all short positions.Current Short Interest1,370,000 sharesPrevious Short Interest1,440,000 sharesChange Vs. Previous Month-4.86%Dollar Volume Sold Short$2.52 millionShort Interest Ratio2.6 Days to CoverLast Record DateJuly 31, 2025Outstanding Shares40,747,000 sharesShort Percent of Float3.61%Today's Trading Volume398,425 sharesAverage Trading Volume856,319 sharesToday's Volume Vs. Average47% Short Selling Pulmonx? Sign up to receive the latest short interest report for Pulmonx and its competitors with MarketBeat's FREE newsletter. Email Address Get Report View SMS TermsBy entering your phone number and clicking the sign-up button, you agree to receive periodic text messages from MarketBeat at the phone number you submitted, including texts that may be sent using an automatic telephone dialing system. Message and data rates may apply. 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Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartLUNG Short Interest Over TimeLUNG Days to Cover Over TimeLUNG Percentage of Float Shorted Over Time Pulmonx Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 7/31/20251,370,000 shares $2.52 million -4.9%3.6%2.6 $1.84 7/15/20251,440,000 shares $3.89 million +9.1%4.1%3.7 $2.70 6/30/20251,320,000 shares $3.42 million -7.0%3.8%3.6 $2.59 6/15/20251,420,000 shares $4.30 million +6.0%4.0%3.8 $3.03 5/31/20251,340,000 shares $4.49 million -14.1%3.8%3.6 $3.35 5/15/20251,560,000 shares $5.34 million +31.1%4.4%4.3 $3.42 4/30/20251,190,000 shares $5.75 million +1.7%3.3%3 $4.83 4/15/20251,170,000 shares $5.76 million -4.9%3.4%3.3 $4.92 3/31/20251,230,000 shares $8.28 million +5.1%3.6%3.6 $6.73 3/15/20251,170,000 shares $8.80 million -6.4%3.4%3.8 $7.52 Get the Latest News and Ratings for LUNG and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Pulmonx and its competitors with MarketBeat's FREE daily newsletter. 2/28/20251,250,000 shares $10.78 million +8.7%3.7%4 $8.62 2/15/20251,150,000 shares $8.02 million -5.7%3.4%3.9 $6.97 1/31/20251,220,000 shares $6.93 million -2.4%N/A5.5 $5.68 1/15/20251,250,000 shares $8.40 million +42.2%N/A5.4 $6.72 12/31/2024878,900 shares $5.97 million +5.7%N/A3.8 $6.79 12/15/2024831,800 shares $5.07 million +2.0%N/A3.9 $6.10 11/30/2024815,600 shares $5.26 million -3.2%N/A3.7 $6.45 11/15/2024842,700 shares $5.34 million -14.5%N/A3.6 $6.34 10/31/2024986,100 shares $6.16 million -44.6%N/A3.9 $6.25 10/15/20241,780,000 shares $12.39 million +6.0%5.0%6.2 $6.96 9/30/20241,680,000 shares $13.93 million -6.7%4.8%5.6 $8.29 9/15/20241,800,000 shares $14.96 million +13.9%5.1%5.6 $8.31 8/31/20241,580,000 shares $11.57 million +9.0%4.5%4.5 $7.32 8/15/20241,450,000 shares $8.77 million -8.2%4.1%3.9 $6.05 7/31/20241,580,000 shares $10.92 million +22.5%4.5%4.3 $6.91 7/15/20241,290,000 shares $10.01 million +7.5%3.7%3.3 $7.76 6/30/20241,200,000 shares $7.61 million -14.3%3.4%2.7 $6.34 6/15/20241,400,000 shares $8.08 million -11.4%4.0%2.8 $5.77 5/31/20241,580,000 shares $11.46 million +1.3%4.5%3.1 $7.25 5/15/20241,560,000 shares $14.54 million +10.6%4.5%2.8 $9.32 4/30/20241,410,000 shares $10.73 million -18.5%4.0%2.3 $7.61 4/15/20241,730,000 shares $12.92 million +53.1%5.0%3.1 $7.47 3/31/20241,130,000 shares $10.48 million +8.7%3.2%2.2 $9.27 3/15/20241,040,000 shares $9.31 million -17.5%3.0%2.3 $8.95 2/29/20241,260,000 shares $11.62 million No Change3.6%3.2 $9.22 2/15/20241,260,000 shares $18.37 million -18.7%3.6%3.6 $14.58 1/31/20241,550,000 shares $20.58 million -0.6%4.6%5.6 $13.28 1/15/20241,560,000 shares $19.86 million +7.6%4.6%6 $12.73 12/31/20231,450,000 shares $18.49 million +2.8%4.5%5.7 $12.75 12/15/20231,410,000 shares $17.34 million -1.4%4.4%5.8 $12.30Forget Tesla — This Tiny AI Stock Is Musk’s Real Play (Ad)While Wall Street focused on Tesla’s earnings, Elon Musk was quietly building a supercomputer so powerful it could transform warfare, robotics, and the global economy. 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Hedge funds are already loading up, but most investors haven’t noticed yet.See the full details on this “backdoor” Musk bet here 11/30/20231,430,000 shares $15.59 million +6.7%4.5%6 $10.90 11/15/20231,340,000 shares $14.49 million +3.1%4.2%5.9 $10.81 10/31/20231,300,000 shares $11.43 million +5.7%4.1%6.6 $8.79 10/15/20231,230,000 shares $9.83 million -3.2%3.9%5.9 $7.99 9/30/20231,270,000 shares $13.12 million +3.3%4.0%6.3 $10.33 9/15/20231,230,000 shares $12.76 million -2.4%3.9%5.8 $10.37 8/31/20231,260,000 shares $13.18 million -25.9%3.8%5.5 $10.46 8/15/20231,700,000 shares $18.97 million -16.3%5.2%7.2 $11.16 7/31/20232,030,000 shares $28.42 million +23.8%6.3%8.5 $14.00 7/15/20231,640,000 shares $22.11 million -5.2%5.1%6.5 $13.48 6/30/20231,730,000 shares $22.68 million -39.5%5.4%6.1 $13.11 6/15/20232,860,000 shares $36.64 million +19.2%8.9%9 $12.81 5/31/20232,400,000 shares $28.82 million -7.0%7.5%7 $12.01 5/15/20232,580,000 shares $33.88 million -3.0%8.0%5.5 $13.13 4/30/20232,660,000 shares $31.26 million -6.3%8.3%5.4 $11.75 4/15/20232,840,000 shares $30.96 million -7.8%8.9%5.5 $10.90 3/31/20233,080,000 shares $34.43 million +18.5%10.1%6.1 $11.18 3/15/20232,600,000 shares $29.07 million +10.2%8.5%4.8 $11.18 2/28/20232,360,000 shares $26.50 million -16.6%7.7%4.5 $11.23 2/15/20232,830,000 shares $26.43 million -7.5%9.2%5.9 $9.34 1/31/20233,060,000 shares $27.20 million +3.7%9.4%5.1 $8.89 1/15/20232,950,000 shares $26.31 million +4.6%9.1%4.3 $8.92 12/30/20222,820,000 shares $23.77 million -4.1%8.7%4.2 $8.43 12/15/20222,940,000 shares $20.99 million +2.8%9.1%4.6 $7.14 11/30/20222,860,000 shares $17.22 million +17.7%8.8%5 $6.02 11/15/20222,430,000 shares $14.68 million -25.2%7.5%4.4 $6.04 10/31/20223,250,000 shares $43.42 million -12.9%10.1%6.8 $13.36 10/15/20223,730,000 shares $51.51 million +6.9%11.5%12.1 $13.81 9/30/20223,490,000 shares $58.14 million +4.8%10.8%11.3 $16.66 9/15/20223,330,000 shares $65.77 million +5.4%10.7%9.7 $19.75 8/31/20223,160,000 shares $58.05 million +7.9%10.1%7.5 $18.37 8/15/20222,930,000 shares $65.81 million -13.1%9.4%6.3 $22.46 7/31/20223,370,000 shares $57.42 million +23.9%10.8%6.7 $17.04 7/15/20222,720,000 shares $43.41 million -6.9%8.8%5.2 $15.96 6/30/20222,920,000 shares $42.98 million +11.9%9.4%5.2 $14.72 6/15/20222,610,000 shares $39.10 million -3.3%8.4%4.8 $14.98 5/31/20222,700,000 shares $49.30 million -20.1%8.7%5.8 $18.26 5/15/20223,380,000 shares $63.24 million +9.7%10.8%6.9 $18.71 4/30/20223,080,000 shares $74.23 million +15.4%11.0%6.6 $24.10 4/15/20222,670,000 shares $72.78 million No Change9.5%6.3 $27.26 3/31/20222,670,000 shares $66.24 million -4.3%9.6%6.4 $24.81 3/15/20222,790,000 shares $59.85 million -5.1%10.0%6.6 $21.45 2/28/20222,940,000 shares $77.20 million +13.1%10.5%7.1 $26.26 2/15/20222,600,000 shares $73.68 million +6.6%9.3%6.2 $28.34 1/31/20222,440,000 shares $59.41 million +40.2%8.8%6.2 $24.35 1/15/20221,740,000 shares $48.35 million +8.8%6.6%4.5 $27.79 12/31/20211,600,000 shares $51.31 million -18.8%6.1%4.7 $32.07 12/15/20211,970,000 shares $63.41 million +16.6%7.5%5.8 $32.19 11/30/20211,690,000 shares $54.59 million +15.0%6.4%4.6 $32.30 11/15/20211,470,000 shares $56.02 million -5.2%5.6%4.3 $38.11Retire Comfortably with These New Monthly Income ETFs? 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This strategy was once reserved for the ultra-wealthy, but it’s now available to everyday investors.Click here to watch the free presentation and learn how to calculate your personal Freedom Number—an 10/29/20211,550,000 shares $60.34 million +9.9%5.9%4.6 $38.93 10/15/20211,410,000 shares $56.13 million -2.1%5.3%4.4 $39.81 9/30/20211,440,000 shares $51.81 million +21.0%5.4%4.1 $35.98 9/15/20211,190,000 shares $46.40 million -9.9%4.5%3.1 $38.99 8/31/20211,320,000 shares $53.05 million +10.0%5.0%3.6 $40.19 8/13/20211,200,000 shares $44.09 million +7.1%4.6%3.1 $36.74 7/30/20211,120,000 shares $44.42 million +2.8%4.7%2.7 $39.66 7/15/20211,090,000 shares $41.83 million -10.7%4.5%2.4 $38.38 6/30/20211,220,000 shares $53.83 million +26.0%5.7%2.6 $44.12 6/15/2021968,000 shares $42.47 million +1.1%4.5%2 $43.87 5/28/2021957,900 shares $41.11 million -7.9%4.4%2.1 $42.92 5/14/20211,040,000 shares $39.54 million +30.2%4.9%2.4 $38.02 4/30/2021798,600 shares $37.58 million -6.3%3.8%2.1 $47.06 4/15/2021851,900 shares $37.17 million -57.0%4.1%2.9 $43.63 3/31/20211,980,000 shares $87.12 million +72.2%10.3%7.8 $44.00 3/15/20211,150,000 shares $69.51 million +18.7%6.4%5.3 $60.44 2/26/2021969,000 shares $52.33 million +5.1%5.4%4.3 $54.00 2/12/2021921,700 shares $54.80 million -32.2%5.1%4.3 $59.45 1/29/20211,360,000 shares $81.84 million -0.7%7.6%6.1 $60.18 1/15/20211,370,000 shares $81.88 million No Change7.7%6 $59.77 LUNG Short Interest - Frequently Asked Questions What is Pulmonx's current short interest? Short interest is the volume of Pulmonx shares that have been sold short but have not yet been closed out or covered. As of July 31st, investors have sold 1,370,000 shares of LUNG short. 3.61% of Pulmonx's shares are currently sold short. Learn More on Pulmonx's current short interest. What is a good short interest ratio for Pulmonx? 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. LUNG shares currently have a short interest ratio of 3.0. Learn More on Pulmonx's short interest ratio. Which institutional investors are shorting Pulmonx? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Pulmonx: Group One Trading LLC, 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 Pulmonx? 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. 3.61% of Pulmonx's floating shares are currently sold short. Is Pulmonx's short interest increasing or decreasing? Pulmonx saw a decrease in short interest in the month of July. As of July 31st, there was short interest totaling 1,370,000 shares, a decrease of 4.9% from the previous total of 1,440,000 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. How does Pulmonx's short interest compare to its competitors? 3.61% of Pulmonx's shares are currently sold short. Here is how the short interest of companies in the industry of "medical equipment" compare to Pulmonx: Alpha Tau Medical Ltd. (0.15%), Perspective Therapeutics, Inc. (11.29%), Outset Medical, Inc. (12.72%), TriSalus Life Sciences, Inc. (3.88%), Nano-X Imaging Ltd. (11.26%), Neuronetics, Inc. (7.87%), Sight Sciences, Inc. (3.95%), Monogram Orthopaedics Inc. (1.62%), Nyxoah SA (0.94%), Inogen, Inc (3.35%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: SPDR S&P 500 ETF Trust ($70.87 billion), Invesco QQQ ($30.12 billion), iShares Russell 2000 ETF ($19.85 billion), iShares 20+ Year Treasury Bond ETF ($10.34 billion), Strategy Inc ($8.98 billion), iShares iBoxx $ Investment Grade Corporate Bond ETF ($7.61 billion), SPDR S&P Biotech ETF ($6.81 billion), Invesco S&P 500 Equal Weight ETF ($6.14 billion), Palo Alto Networks, Inc. ($5.97 billion), and Super Micro Computer, Inc. ($5.28 billion). View all of the most shorted stocks. What does it mean to sell short Pulmonx stock? Short selling LUNG is an investing strategy that aims to generate trading profit from Pulmonx as its price is falling. LUNG shares are trading down $0.05 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 Pulmonx? A short squeeze for Pulmonx 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 LUNG, which in turn drives the price of the stock up even further. How often is Pulmonx'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 LUNG, twice per month. The most recent reporting period available is July, 31 2025. More Short Interest Resources from MarketBeat Related Companies DRTS Short Interest CATX Short Interest OM Short Interest TLSI Short Interest NNOX Short Interest STIM Short Interest SGHT Short Interest MGRM Short Interest NYXH Short Interest INGN Short Interest Short Interest Tools Stocks to Short Largest Short Interest Positions Short Interest Increases Short Interest Decreases Short Interest Reporting Dates This page (NASDAQ:LUNG) was last updated on 9/1/2025 by MarketBeat.com Staff From Our PartnersRetire Comfortably with These New Monthly Income ETFs?Too many retirees lie awake at night, worried their savings won’t last. Traditional advice and tiny returns ju...Investors Alley | SponsoredForget Tesla — This Tiny AI Stock Is Musk’s Real PlayWhile Wall Street focused on Tesla’s earnings, Elon Musk was quietly building a supercomputer so powerful it c...Behind the Markets | SponsoredOut of 18,347 Cryptocurrencies... 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