PubMatic (PUBM) Short Interest Ratio & Short Volume $8.76 +0.23 (+2.70%) Closing price 08/28/2025 04:00 PM EasternExtended Trading$8.78 +0.02 (+0.17%) As of 04:21 AM 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 ForecastsChartCompetitorsEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock PubMatic Short Interest DataPubMatic (PUBM) has a short interest of 1.55 million shares, representing 4.34% of the float (the number of shares available for trading by the public). This marks a -8.28% 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 935,380 shares to cover all short positions.Current Short Interest1,550,000 sharesPrevious Short Interest1,690,000 sharesChange Vs. Previous Month-8.28%Dollar Volume Sold Short$18.62 millionShort Interest Ratio2.6 Days to CoverLast Record DateJuly 31, 2025Outstanding Shares45,720,000 sharesShort Percent of Float4.34%Today's Trading Volume493,473 sharesAverage Trading Volume935,380 sharesToday's Volume Vs. Average53% Short Selling PubMatic? Sign up to receive the latest short interest report for PubMatic 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 ChartPUBM Short Interest Over TimePUBM Days to Cover Over TimePUBM Percentage of Float Shorted Over Time PubMatic Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 7/31/20251,550,000 shares $18.62 million -8.3%4.3%2.6 $12.01 7/15/20251,690,000 shares $20.87 million +5.6%N/A2.9 $12.35 6/30/20251,600,000 shares $19.90 million -16.7%4.5%2.6 $12.44 6/15/20251,920,000 shares $20.56 million +6.7%5.4%3.2 $10.71 5/31/20251,800,000 shares $21.08 million +9.8%3.9%2.9 $11.71 5/15/20251,640,000 shares $18.94 million +3.1%3.5%2.5 $11.55 4/30/20251,590,000 shares $15.53 million +12.0%N/A2.6 $9.77 4/15/20251,420,000 shares $11.79 million -0.7%3.1%2.5 $8.30 3/31/20251,430,000 shares $13.07 million -2.7%3.1%2.8 $9.14 3/15/20251,470,000 shares $13.94 million +34.9%3.2%3.2 $9.48 Get the Latest News and Ratings for PUBM and Related StocksEnter your email address below to receive the latest news and analysts' ratings for PubMatic and its competitors with MarketBeat's FREE daily newsletter. 2/28/20251,090,000 shares $11.59 million +15.0%2.4%2.7 $10.63 2/15/2025947,500 shares $14.88 million -12.3%2.0%3 $15.70 1/31/20251,080,000 shares $16.33 million -2.7%N/A3 $15.12 1/15/20251,110,000 shares $15.98 million +4.7%N/A3.2 $14.40 12/31/20241,060,000 shares $15.57 million +1.0%N/A3.1 $14.69 12/15/20241,050,000 shares $17.12 million -5.4%N/A3 $16.30 11/30/20241,110,000 shares $17.70 million -14.0%N/A3 $15.95 11/15/20241,290,000 shares $19.20 million -5.2%N/A3.3 $14.88 10/31/20241,360,000 shares $20.00 million -2.9%N/A3.1 $14.71 10/15/20241,400,000 shares $21.41 million +2.2%N/A2.8 $15.29 9/30/20241,370,000 shares $20.37 million +2.2%N/A2.7 $14.87 9/15/20241,340,000 shares $19.54 million -3.6%N/A2.5 $14.58 8/31/20241,390,000 shares $21.68 million -8.6%N/A2.5 $15.60 8/15/20241,520,000 shares $21.05 million +0.7%N/A2.7 $13.85 7/31/20241,510,000 shares $33.16 million -10.1%N/A3.1 $21.96 7/15/20241,680,000 shares $35.58 million -2.9%N/A4 $21.18 6/30/20241,730,000 shares $35.14 million -4.4%N/A4.1 $20.31 6/15/20241,810,000 shares $38.41 million +10.4%N/A4.5 $21.22 5/31/20241,640,000 shares $35.92 million -2.4%N/A3.8 $21.90 5/15/20241,680,000 shares $39.13 million +5.0%N/A3.1 $23.29 4/30/20241,600,000 shares $35.90 million -8.1%N/A3.1 $22.44 4/15/20241,740,000 shares $37.71 million +21.7%N/A3.4 $21.67 3/31/20241,430,000 shares $33.92 million +1.4%N/A2.8 $23.72 3/15/20241,410,000 shares $32.29 million +23.7%N/A2.8 $22.90 2/29/20241,140,000 shares $23.87 million -4.2%N/A2.5 $20.94 2/15/20241,190,000 shares $19.44 million +9.2%N/A2.9 $16.34 1/31/20241,090,000 shares $16.55 million -3.5%N/A2.9 $15.18 1/15/20241,130,000 shares $16.89 million -7.4%N/A3.1 $14.95 12/31/20231,220,000 shares $19.90 million -0.8%N/A3.5 $16.31 12/15/20231,230,000 shares $21.41 million +13.9%N/A3.6 $17.41Market Panic: Trump Just Dropped a Bomb on Your Stocks (Ad)tock Market Panic: Trump Just Dropped a Bomb on Your Stocks The market is in freefall—and Trump's new tariffs just lit the fuse. Millions of investors are blindsided as stocks plunge… but this is only Phase 1. If you're still holding the wrong assets, you could lose 30% or more in the coming weeks.Don't wait for the next drop to wipe you out. Get the FREE Guide Before Markets Open Tomorrow 11/30/20231,080,000 shares $18.05 million +6.9%N/A3.2 $16.71 11/15/20231,010,000 shares $16.15 million -4.7%N/A2.9 $15.99 10/31/20231,060,000 shares $11.95 million -7.0%N/A2.6 $11.27 10/15/20231,140,000 shares $13.69 million -21.4%N/A2.9 $12.01 9/30/20231,450,000 shares $17.55 million +5.1%N/A3.7 $12.10 9/15/20231,380,000 shares $17.29 million -14.8%N/A3.5 $12.53 8/31/20231,620,000 shares $22.52 million +8.0%N/A3.9 $13.90 8/15/20231,500,000 shares $19.28 million +26.1%N/A3.5 $12.85 7/31/20231,190,000 shares $23.79 million -9.2%N/A2.6 $19.99 7/15/20231,310,000 shares $25.15 million -5.1%N/A2.9 $19.20 6/30/20231,380,000 shares $25.23 million -1.4%N/A3 $18.28 6/15/20231,400,000 shares $27.01 million +7.7%N/A3 $19.29 5/31/20231,300,000 shares $22.82 million -26.1%N/A2.8 $17.55 5/15/20231,760,000 shares $26.19 million +1.2%N/A3.4 $14.88 4/30/20231,740,000 shares $23.77 million -13.9%N/A3.7 $13.66 4/15/20232,020,000 shares $28.79 million +6.3%N/A4.6 $14.25 3/31/20231,900,000 shares $26.26 million -7.3%N/A4.3 $13.82 3/15/20232,050,000 shares $27.16 million +2.5%N/A4.3 $13.25 2/28/20232,000,000 shares $30.36 million +1.0%N/A4 $15.18 2/15/20231,980,000 shares $33.54 million +0.5%N/A4.5 $16.94 1/31/20231,970,000 shares $30.20 million -3.0%N/A4.1 $15.33 1/15/20232,030,000 shares $28.81 million -2.4%N/A4 $14.19 12/30/20222,080,000 shares $26.64 million -8.0%N/A4.1 $12.81 12/15/20222,260,000 shares $29.40 million -2.6%N/A4.2 $13.01 11/30/20222,320,000 shares $36.35 million -4.5%N/A4.2 $15.67 11/15/20222,430,000 shares $39.78 million -2.8%N/A4.3 $16.37 10/31/20222,500,000 shares $43.50 million -0.4%N/A4.2 $17.40 10/15/20222,510,000 shares $41.87 million +6.8%N/A4 $16.68 9/30/20222,350,000 shares $39.08 million -12.0%N/A3.5 $16.63 9/15/20222,670,000 shares $48.59 million -16.6%N/A3.4 $18.20 8/31/20223,200,000 shares $62.62 million -7.5%N/A3.8 $19.57 8/15/20223,460,000 shares $78.47 million -16.6%N/A3.9 $22.68 7/31/20224,150,000 shares $68.85 million -12.1%N/A4.2 $16.59 7/15/20224,720,000 shares $73.35 million -5.8%N/A5 $15.54 6/30/20225,010,000 shares $79.61 million +53.7%N/A5.2 $15.89 6/15/20223,260,000 shares $61.68 million +14.8%N/A3.4 $18.92 5/31/20222,840,000 shares $56.63 million +10.5%N/A3.3 $19.94 5/15/20222,570,000 shares $57.26 million No ChangeN/A2.7 $22.28 4/30/20222,570,000 shares $58.00 million +14.2%N/A2.7 $22.57 4/15/20222,250,000 shares $54.97 million -5.5%N/A2.3 $24.43 3/31/20222,380,000 shares $62.17 million +10.2%N/A2.3 $26.12 3/15/20222,160,000 shares $41.93 million +1.4%N/A2 $19.41 2/28/20222,130,000 shares $65.18 million +10.4%N/A1.9 $30.60 2/15/20221,930,000 shares $61.35 million +12.9%N/A1.6 $31.79 1/31/20221,710,000 shares $41.98 million +13.3%N/A1.1 $24.55 1/15/20221,510,000 shares $39.56 million +14.4%N/A1 $26.20 12/31/20211,320,000 shares $44.95 million -36.5%N/A0.8 $34.05 12/15/20212,080,000 shares $73.09 million -14.1%N/A1.3 $35.14 11/30/20212,420,000 shares $95.28 million +3.0%N/A1.6 $39.37 11/15/20212,350,000 shares $90.01 million +2.6%N/A1.7 $38.30Market Panic: Trump Just Dropped a Bomb on Your Stocks (Ad)tock Market Panic: Trump Just Dropped a Bomb on Your Stocks The market is in freefall—and Trump's new tariffs just lit the fuse. Millions of investors are blindsided as stocks plunge… but this is only Phase 1. If you're still holding the wrong assets, you could lose 30% or more in the coming weeks.Don't wait for the next drop to wipe you out. Get the FREE Guide Before Markets Open Tomorrow 10/29/20212,290,000 shares $65.45 million +2.2%N/A2.2 $28.58 10/15/20212,240,000 shares $65.27 million -20.9%N/A2.2 $29.14 9/30/20212,830,000 shares $74.57 million +18.9%N/A2.9 $26.35 9/15/20212,380,000 shares $68.00 million -5.9%N/A2.3 $28.57 8/31/20212,530,000 shares $73.75 million -9.3%N/A2.2 $29.15 8/13/20212,790,000 shares $82.75 million +3.3%N/A2 $29.66 7/30/20212,700,000 shares $80.22 million +3.1%39.3%2.1 $29.71 7/15/20212,620,000 shares $79.78 million +0.8%36.7%2.2 $30.45 6/30/20212,600,000 shares $101.58 million -9.1%36.4%2.2 $39.07 6/15/20212,860,000 shares $96.32 million -24.3%41.6%2.7 $33.68 5/28/20213,780,000 shares $111.77 million +9.6%55.0%4.3 $29.57 5/14/20213,450,000 shares $118.40 million +6.5%N/A4.9 $34.32 4/30/20213,240,000 shares $174.77 million +10.6%50.4%4.8 $53.94 4/15/20212,930,000 shares $155.58 million -2.3%45.6%4.3 $53.10 3/31/20213,000,000 shares $148.17 million +23.5%49.6%4 $49.39 3/15/20212,430,000 shares $139.29 million +23.4%40.6%3.2 $57.32 2/26/20211,970,000 shares $128.90 million +4.2%32.9%2.1 $65.43 2/12/20211,890,000 shares $87.24 million +25.2%80.4%2.1 $46.16 1/29/20211,510,000 shares $54.74 million +11.0%70.2%1.6 $36.25 1/15/20211,360,000 shares $40.79 million No Change63.3%1.4 $29.99 PUBM Short Interest - Frequently Asked Questions What is PubMatic's current short interest? Short interest is the volume of PubMatic shares that have been sold short but have not yet been covered or closed out. As of July 31st, investors have sold 1,550,000 shares of PUBM short. 4.34% of PubMatic's shares are currently sold short. Learn More on PubMatic's current short interest. What is a good short interest ratio for PubMatic? 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. PUBM shares currently have a short interest ratio of 3.0. Learn More on PubMatic's short interest ratio. Which institutional investors are shorting PubMatic? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of PubMatic: Group One Trading LLC, Jane Street Group LLC, Walleye Capital LLC, and Walleye Trading LLC. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission. What is a good short interest percentage for PubMatic? 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. 4.34% of PubMatic's floating shares are currently sold short. Is PubMatic's short interest increasing or decreasing? PubMatic saw a drop in short interest in the month of July. As of July 31st, there was short interest totaling 1,550,000 shares, a drop of 8.3% from the previous total of 1,690,000 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 PubMatic's short interest compare to its competitors? 4.34% of PubMatic's shares are currently sold short. Here is how the short interest of companies in the industry of "computer software" compare to PubMatic: Magnite, Inc. (11.11%), Nayax Ltd. (0.18%), Integral Ad Science Holding Corp. (10.59%), Opera Limited Sponsored ADR (15.86%), Karooooo Ltd. (0.53%), N-able, Inc. (3.76%), MeridianLink, Inc. (4.99%), PagerDuty (12.55%), Rapid7, Inc. (5.03%), Couchbase, Inc. (7.97%), 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 PubMatic stock? Short selling PUBM is an investing strategy that aims to generate trading profit from PubMatic as its price is falling. PUBM shares are trading up $0.23 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 PubMatic? A short squeeze for PubMatic 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 PUBM, which in turn drives the price of the stock up even further. How often is PubMatic'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 PUBM, twice per month. The most recent reporting period available is July, 31 2025. More Short Interest Resources from MarketBeat Related Companies Magnite Short Interest Nayax Short Interest Integral Ad Science Short Interest Opera Short Interest Karooooo Short Interest N-able Short Interest MeridianLink Short Interest PagerDuty Short Interest Rapid7 Short Interest Couchbase 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:PUBM) was last updated on 8/29/2025 by MarketBeat.com Staff From Our PartnersMusk’s Project Colossus could mint millionairesI predict this single breakthrough could make Elon the world’s first trillionaire — and mint more new milliona...Brownstone Research | SponsoredINVESTOR ALERT: Tiny “$3 AI Wonder Stock” on the Verge of Blasting OffRight now, we’re witnessing a monumental shift in the world.Traders Agency | SponsoredBONUS GUIDE - Ben Stein Prepares For the Next Financial CrisisWith inflation high, debt soaring, and global tensions rising, a financial storm may be brewing. 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