Iron Mountain (IRM) Short Interest Ratio & Short Volume $106.20 -0.02 (-0.02%) Closing price 03:59 PM EasternExtended Trading$104.08 -2.12 (-2.00%) As of 07:59 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 InterestSustainabilityTrends Iron Mountain Short Interest DataIron Mountain (IRM) has a short interest of 8.15 million shares. This marks a 8.09% increase in short interest from the previous month. The short interest ratio (days to cover) is 4.8, indicating that it would take 4.8 days of the average trading volume of 1.80 million shares to cover all short positions.Current Short Interest8,150,000 sharesPrevious Short Interest7,540,000 sharesChange Vs. Previous Month+8.09%Dollar Volume Sold Short$863.49 millionShort Interest Ratio4.8 Days to CoverLast Record DateJanuary 15, 2025Outstanding Shares293,460,000 sharesPercentage of Shares Shorted2.78%Today's Trading Volume1,026,386 sharesAverage Trading Volume1,804,792 sharesToday's Volume Vs. Average57% Short Selling Iron Mountain? Sign up to receive the latest short interest report for Iron Mountain and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartIRM Short Interest Over TimeIRM Days to Cover Over TimeIRM Percentage of Float Shorted Over Time Iron Mountain Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 1/15/20258,150,000 shares $863.49 million +8.1%N/A4.8 $105.95 12/31/20247,540,000 shares $792.53 million -5.4%N/A4.7 $105.11 12/15/20247,970,000 shares $891.84 million -4.8%N/A5.2 $111.90 11/30/20248,370,000 shares $1.04 billion +0.2%N/A5.7 $123.67 11/15/20248,350,000 shares $959.16 million -9.9%N/A5.8 $114.87 10/31/20249,270,000 shares $1.15 billion +3.6%N/A6.3 $123.70 10/15/20248,950,000 shares $1.09 billion -10.2%N/A5.6 $122.00 9/30/20249,970,000 shares $1.18 billion -12.2%N/A5.9 $118.83 9/15/202411,360,000 shares $1.33 billion +14.5%N/A6.5 $117.06 8/31/20249,920,000 shares $1.12 billion -13.7%N/A4.9 $113.26 Get the Latest News and Ratings for IRM and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Iron Mountain and its competitors with MarketBeat's FREE daily newsletter. 8/15/202411,490,000 shares $1.25 billion -10.0%N/A5.7 $108.50 7/31/202412,760,000 shares $1.31 billion -13.6%N/A6.4 $102.50 7/15/202414,760,000 shares $1.44 billion +0.3%N/A8.3 $97.83 6/30/202414,720,000 shares $1.32 billion +18.0%N/A8.7 $89.62 6/15/202412,470,000 shares $1.10 billion +17.3%N/A7.7 $88.02 5/31/202410,630,000 shares $857.73 million +6.7%N/A8.2 $80.69 5/15/20249,960,000 shares $820.11 million +0.2%N/A7.1 $82.34 4/30/20249,940,000 shares $770.55 million +1.0%N/A7 $77.52 4/15/20249,840,000 shares $736.43 million +0.4%N/A6.9 $74.84 3/31/20249,800,000 shares $786.06 million -6.8%N/A6.8 $80.21 3/15/202410,520,000 shares $826.98 million -0.9%N/A7.2 $78.61 2/29/202410,620,000 shares $835.16 million -0.2%N/A7.2 $78.64 2/15/202410,640,000 shares $735.65 million +5.8%N/A7.7 $69.14 1/31/202410,060,000 shares $679.15 million -8.9%N/A7.4 $67.51 1/15/202411,040,000 shares $742.22 million +1.4%N/A7.5 $67.23 12/31/202310,890,000 shares $762.08 million -11.3%N/A7.2 $69.98 12/15/202312,270,000 shares $833.26 million +6.8%N/A7.9 $67.91 11/30/202311,490,000 shares $737.08 million +2.7%N/A7.1 $64.15 11/15/202311,190,000 shares $695.91 million -6.8%N/A7.1 $62.19 10/31/202312,000,000 shares $708.84 million +1.7%N/A7.8 $59.07 10/15/202311,800,000 shares $711.54 million -2.6%N/A8.1 $60.30 9/30/202312,110,000 shares $719.94 million -10.4%N/A8.4 $59.45 9/15/202313,520,000 shares $849.73 million +11.6%N/A9.6 $62.85 8/31/202312,120,000 shares $770.10 million -4.4%N/A9 $63.54 8/15/202312,680,000 shares $756.11 million +0.3%N/A8.6 $59.63 7/31/202312,640,000 shares $776.10 million +1.9%N/A8.7 $61.40 7/15/202312,410,000 shares $738.52 million +5.6%N/A9 $59.51 6/30/202311,750,000 shares $667.52 million -15.4%N/A8.6 $56.81 6/15/202313,890,000 shares $794.09 million +12.2%N/A10.5 $57.17 5/31/202312,380,000 shares $660.78 million -2.0%N/A9.3 $53.38Nvidia > DeepSeek (Ad)Everyone's getting it all wrong … Sure, DeepSeek's reveal caused AI stocks to tumble … But, in the long run … that's a good thing.Click here to see why Nvidia's bad day could end up being a great year. 5/15/202312,630,000 shares $702.99 million +0.1%N/A9.6 $55.66 4/30/202312,620,000 shares $697.13 million -9.1%N/A9.4 $55.24 4/15/202313,890,000 shares $732.84 million +3.6%4.8%9.4 $52.76 3/31/202313,410,000 shares $709.52 million -13.0%4.7%9 $52.91 3/15/202315,410,000 shares $802.40 million +7.7%5.4%10.4 $52.07 2/28/202314,310,000 shares $754.85 million +0.4%5.0%9.7 $52.75 2/15/202314,260,000 shares $759.49 million -6.0%5.0%9.8 $53.26 1/31/202315,170,000 shares $827.98 million -5.0%5.3%10.8 $54.58 1/15/202315,960,000 shares $839.97 million -0.3%5.5%12.3 $52.63 12/30/202216,000,000 shares $797.60 million -15.5%5.6%12.2 $49.85 12/15/202218,930,000 shares $1.03 billion +10.1%6.6%13.5 $54.32 11/30/202217,190,000 shares $933.93 million -1.3%6.0%10.8 $54.33 11/15/202217,410,000 shares $915.42 million -9.0%6.0%10.7 $52.58 10/31/202219,130,000 shares $957.84 million +1.1%6.6%12 $50.07 10/15/202218,920,000 shares $835.13 million +2.1%6.6%10.9 $44.14 9/30/202218,530,000 shares $814.76 million +0.8%6.4%10 $43.97 9/15/202218,390,000 shares $983.87 million +7.2%6.4%10.2 $53.50 8/31/202217,160,000 shares $902.79 million -0.1%6.0%10.5 $52.61 8/15/202217,170,000 shares $936.28 million +0.8%6.0%10.7 $54.53 7/31/202217,040,000 shares $826.27 million -3.3%5.9%9.7 $48.49 7/15/202217,620,000 shares $790.08 million +5.5%6.1%10.4 $44.84 6/30/202216,700,000 shares $813.12 million -5.5%5.8%10.7 $48.69 6/15/202217,670,000 shares $847.63 million -3.9%6.1%10.6 $47.97 5/31/202218,380,000 shares $990.68 million -5.7%6.4%10.8 $53.90 5/15/202219,490,000 shares $1.02 billion -3.8%6.8%10.2 $52.33 4/30/202220,250,000 shares $1.09 billion -1.8%7.0%10.8 $53.73 4/15/202220,620,000 shares $1.14 billion -3.2%7.2%10 $55.42 3/31/202221,310,000 shares $1.18 billion -0.1%7.4%9.1 $55.41 3/15/202221,330,000 shares $1.04 billion -1.3%7.4%9 $48.68 2/28/202221,610,000 shares $1.06 billion -1.5%7.5%9.2 $49.18 2/15/202221,930,000 shares $959.44 million -5.6%7.6%9.7 $43.75 1/31/202223,230,000 shares $1.07 billion -7.3%8.1%10.7 $45.92 1/15/202225,060,000 shares $1.12 billion -4.6%8.7%12.5 $44.77 12/31/202126,260,000 shares $1.37 billion -7.7%9.2%14.4 $52.33 12/15/202128,440,000 shares $1.41 billion -3.5%9.9%17.2 $49.53 11/30/202129,480,000 shares $1.34 billion -1.6%10.3%19.4 $45.44 11/15/202129,950,000 shares $1.47 billion +4.1%10.5%19.7 $48.96 10/29/202128,770,000 shares $1.31 billion -0.9%10.0%19.4 $45.64 10/15/202129,040,000 shares $1.30 billion +0.4%10.1%20.6 $44.88 9/30/202128,940,000 shares $1.26 billion -1.2%10.1%19.6 $43.45 9/15/202129,290,000 shares $1.32 billion +5.6%10.2%18.2 $45.07 8/31/202127,740,000 shares $1.32 billion -1.9%9.7%16.2 $47.75 8/13/202128,270,000 shares $1.30 billion -1.8%9.9%15.2 $46.10 7/30/202128,790,000 shares $1.26 billion +0.7%10.1%13.6 $43.76 7/15/202128,590,000 shares $1.26 billion -5.6%10.0%12.9 $44.05 6/30/202130,280,000 shares $1.28 billion -12.4%10.6%12.9 $42.32 6/15/202134,570,000 shares $1.59 billion +3.6%12.1%15.6 $45.96 5/28/202133,380,000 shares $1.45 billion -4.8%11.7%15 $43.54 5/14/202135,060,000 shares $1.47 billion -3.6%12.3%14.4 $41.88 4/30/202136,380,000 shares $1.47 billion -3.6%12.8%15 $40.29Nvidia > DeepSeek (Ad)Everyone's getting it all wrong … Sure, DeepSeek's reveal caused AI stocks to tumble … But, in the long run … that's a good thing.Click here to see why Nvidia's bad day could end up being a great year. 4/15/202137,720,000 shares $1.43 billion +1.0%13.2%11.5 $37.99 3/31/202137,340,000 shares $1.39 billion -5.8%13.1%10.9 $37.16 3/15/202139,620,000 shares $1.46 billion +8.8%13.9%11 $36.87 2/26/202136,410,000 shares $1.26 billion +4.6%12.8%9.4 $34.60 2/12/202134,810,000 shares $1.16 billion +2.4%12.2%9 $33.24 1/29/202133,980,000 shares $1.14 billion -31.8%12.0%8 $33.41 1/15/202149,800,000 shares $1.50 billion +0.2%17.5%12.6 $30.19 12/31/202049,690,000 shares $1.46 billion -0.8%17.5%15.3 $29.29 12/15/202050,070,000 shares $1.47 billion -6.7%17.6%15.8 $29.27 11/30/202053,690,000 shares $1.43 billion +0.6%18.9%16.9 $26.62 11/15/202053,390,000 shares $1.36 billion +5.5%18.8%18.6 $25.49 10/30/202050,630,000 shares $1.33 billion -5.6%17.8%20.9 $26.33 10/15/202053,650,000 shares $1.48 billion -0.7%18.9%22.5 $27.51 9/30/202054,020,000 shares $1.45 billion -6.4%19.0%21.8 $26.79 9/15/202057,680,000 shares $1.68 billion +3.1%20.3%20.2 $29.07 8/31/202055,930,000 shares $1.68 billion +1.5%19.7%18.2 $30.09 8/14/202055,080,000 shares $1.64 billion -2.5%19.4%16.7 $29.74 7/31/202056,490,000 shares $1.59 billion +1.1%19.9%16.8 $28.19 7/15/202055,900,000 shares $1.53 billion -5.6%19.7%15.8 $27.31 6/30/202059,240,000 shares $1.55 billion +5.7%20.9%16.1 $26.10 6/15/202056,070,000 shares $1.57 billion +3.8%19.8%15.3 $28.02 5/29/202054,040,000 shares $1.39 billion -1.1%19.1%14.5 $25.76 5/15/202054,640,000 shares $1.23 billion +7.4%19.3%14.2 $22.42 4/30/202050,880,000 shares $1.23 billion +6.7%18.0%12.9 $24.18 4/15/202047,680,000 shares $1.17 billion +2.2%16.9%13 $24.61 3/31/202046,650,000 shares $1.10 billion +2.0%16.5%12.9 $23.53 3/13/202045,716,600 shares $1.24 billion +3.2%16.2%15.2 $27.11 2/28/202044,320,000 shares $992.77 million +2.5%15.7%14.7 $22.40 2/14/202043,250,000 shares $1.33 billion +4.2%15.3%16.2 $30.65 IRM Short Interest - Frequently Asked Questions What is Iron Mountain's current short interest? Short interest is the volume of Iron Mountain shares that have been sold short but have not yet been closed out or covered. As of January 15th, traders have sold 8,150,000 shares of IRM short. Learn More on Iron Mountain's current short interest. What is a good short interest ratio for Iron Mountain? 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. IRM shares currently have a short interest ratio of 5.0. Learn More on Iron Mountain's short interest ratio. Which institutional investors are shorting Iron Mountain? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Iron Mountain: Simplex Trading LLC, HighTower Advisors LLC, Wolverine Asset Management LLC, IMC Chicago LLC, Caas Capital Management LP, First Sabrepoint Capital Management LP, Jane Street Group LLC, Wolverine Trading LLC, Paloma Partners Management Co, Verition Fund Management LLC, Capstone Investment Advisors LLC, Walleye Trading LLC, Walleye Capital LLC, and Bank of Montreal Can. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission. Is Iron Mountain's short interest increasing or decreasing? Iron Mountain saw a increase in short interest in January. As of January 15th, there was short interest totaling 8,150,000 shares, an increase of 8.1% from the previous total of 7,540,000 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 Iron Mountain's short interest compare to its competitors? Here is how the short interest of companies compare to Iron Mountain: Cintas Co. (1.15%), Copart, Inc. (1.18%), UniFirst Co. (0.97%), McGrath RentCorp (2.12%), OPENLANE, Inc. (4.32%), Viad Corp (0.84%), Healthcare Services Group, Inc. (4.09%), Prologis, Inc. (1.05%), Equinix, Inc. (1.87%), Welltower Inc. (1.52%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: AppLovin Co. ($4.18 billion), Charter Communications, Inc. ($3.91 billion), Reddit, Inc. ($3.16 billion), The Kroger Co. ($2.75 billion), International Paper ($2.57 billion), Cencora, Inc. ($2.06 billion), SoFi Technologies, Inc. ($2.06 billion), Rivian Automotive, Inc. ($2.00 billion), Live Nation Entertainment, Inc. ($1.63 billion), and Hims & Hers Health, Inc. ($1.57 billion). View all of the most shorted stocks. What does it mean to sell short Iron Mountain stock? Short selling IRM is an investing strategy that aims to generate trading profit from Iron Mountain as its price is falling. IRM shares are trading down $0.02 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 Iron Mountain? A short squeeze for Iron Mountain 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 IRM, which in turn drives the price of the stock up even further. How often is Iron Mountain'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 IRM, twice per month. The most recent reporting period available is January, 15 2025. More Short Interest Resources from MarketBeat Related Companies CTAS Short Squeeze CPRT Short Squeeze UNF Short Squeeze MGRC Short Squeeze KAR Short Squeeze VVI Short Squeeze HCSG Short Squeeze PLD Short Squeeze EQIX Short Squeeze WELL 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:IRM) was last updated on 2/11/2025 by MarketBeat.com Staff From Our PartnersCollect $7k per month from Tesla’s SECRET dividendTesla doesn't pay a traditional dividend.... But I just discovered a secret backdoor to collect a secret 69...Investors Alley | SponsoredNVDA Crash UpdateAn overseas AI rival sent shockwaves through the U.S. tech market last week... Leaving millions of investor...Chaikin Analytics | Sponsored$2 Trillion Disappears Because of Fed's Secretive New Move$2 trillion has disappeared from the US government's books. 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