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Iron Mountain (IRM) Short Interest Ratio & Short Volume

Iron Mountain logo
$84.41 +0.97 (+1.16%)
Closing price 04/14/2025 03:59 PM Eastern
Extended Trading
$85.18 +0.77 (+0.91%)
As of 08:09 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.
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Iron Mountain Short Interest Data

Iron Mountain (IRM) has a short interest of 9.66 million shares, representing 3.36% of the float (the number of shares available for trading by the public). This marks a 11.68% increase in short interest from the previous month. The short interest ratio (days to cover) is 4.4, indicating that it would take 4.4 days of the average trading volume of 1.81 million shares to cover all short positions.

Current Short Interest
9,660,000 shares
Previous Short Interest
8,650,000 shares
Change Vs. Previous Month
+11.68%
Dollar Volume Sold Short
$832.10 million
Short Interest Ratio
4.4 Days to Cover
Last Record Date
March 31, 2025
Outstanding Shares
293,741,000 shares
Short Percent of Float
3.36%
Today's Trading Volume
1,528,613 shares
Average Trading Volume
1,813,988 shares
Today's Volume Vs. Average
84%
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Short Interest ChartDays to Cover ChartShort Percent of Float Chart

IRM Short Interest Over Time

IRM Days to Cover Over Time

IRM Percentage of Float Shorted Over Time

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Iron Mountain Short Interest History

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Report DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date
3/31/20259,660,000 shares $832.10 million +11.7%3.4%4.4 $86.14
3/15/20258,650,000 shares $749.76 million -4.2%3.0%3.9 $86.68
2/28/20259,030,000 shares $841.14 million +4.0%3.1%4.2 $93.15
2/15/20258,680,000 shares $827.59 million +8.0%3.0%4.5 $95.34
1/31/20258,040,000 shares $814.97 million -1.4%N/A4.6 $101.37
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
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
Warning: “DOGE Collapse” imminent (Ad)

Elon Strikes Back You may already sense that the tide is turning against Elon Musk and DOGE. Just this week, President Trump promised to buy a Tesla to help support Musk in the face of a boycott against his company. But according to one research group, with connections to the Pentagon and the U.S. government, Elon's preparing to strike back in a much bigger way in the days ahead.

Click here to see what they’re predicting now.
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 $53.38
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
Warning: “DOGE Collapse” imminent (Ad)

Elon Strikes Back You may already sense that the tide is turning against Elon Musk and DOGE. Just this week, President Trump promised to buy a Tesla to help support Musk in the face of a boycott against his company. But according to one research group, with connections to the Pentagon and the U.S. government, Elon's preparing to strike back in a much bigger way in the days ahead.

Click here to see what they’re predicting now.
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 $40.29
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

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 March 31st, traders have sold 9,660,000 shares of IRM short. 3.36% of Iron Mountain's shares are currently sold 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 4.0. 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: IMC Chicago LLC, DigitalBridge Group Inc., GTS Securities LLC, Wolverine Trading LLC, Squarepoint Ops LLC, Royal Bank of Canada, Millennium Management LLC, Group One Trading LLC, First Sabrepoint Capital Management LP, D. E. Shaw & Co. Inc., DigitalBridge Group Inc., Capstone Investment Advisors LLC, Citadel Advisors LLC, Bank of America Corp DE, Jane Street Group LLC, Paloma Partners Management Co, Tudor Investment Corp ET AL, Parallax Volatility Advisers L.P., Two Sigma Securities LLC, Susquehanna International Group LLP, Concourse Financial Group Securities Inc., Marshall Wace LLP, Walleye Trading LLC, Walleye Capital LLC, Covestor Ltd, Capital Fund Management S.A., Bank of Montreal Can, Simplex Trading LLC, HighTower Advisors LLC, Wolverine Asset Management LLC, IMC Chicago LLC, and Caas Capital Management LP. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission.

What is a good short interest percentage for Iron Mountain?

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. 3.36% of Iron Mountain's floating shares are currently sold short.

Is Iron Mountain's short interest increasing or decreasing?

Iron Mountain saw a increase in short interest during the month of March. As of March 31st, there was short interest totaling 9,660,000 shares, an increase of 11.7% from the previous total of 8,650,000 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?

3.36% of Iron Mountain's shares are currently sold short. Here is how the short interest of companies compare to Iron Mountain: Cintas Co. (1.21%), Copart, Inc. (1.98%), UniFirst Co. (0.74%), McGrath RentCorp (1.53%), OPENLANE, Inc. (3.91%), Healthcare Services Group, Inc. (4.33%), Welltower Inc. (1.40%), Prologis, Inc. (1.47%), Equinix, Inc. (1.82%), Public Storage (2.05%),

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 ($21.93 billion), iShares 20+ Year Treasury Bond ETF ($9.31 billion), Strategy Incorporated ($8.42 billion), Charter Communications, Inc. ($4.52 billion), Apollo Global Management, Inc. ($4.26 billion), Super Micro Computer, Inc. ($3.98 billion), Capital One Financial Co. ($3.79 billion), TC Energy Co. ($3.43 billion), AppLovin Co. ($2.91 billion), and Schlumberger Limited ($2.89 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 up $0.97 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 March, 31 2025.



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This page (NYSE:IRM) was last updated on 4/15/2025 by MarketBeat.com Staff
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