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Rio Tinto (RIO) Short Interest Ratio & Short Volume

Rio Tinto logo
$104.09 +0.78 (+0.75%)
As of 10:53 AM Eastern
This is a fair market value price provided by Massive. Learn more.
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Rio Tinto Short Interest Overview

As of April 30, 2026, Rio Tinto (RIO) had a short interest of 11.35 million shares sold short, representing 0.90% of the public float. This marks a 12.70% increase in short interest since the prior report. The short interest ratio (days to cover) is 4.7, meaning it would take 4.7 days of the average trading volume of 3.41 million shares to cover all short positions.

Current Short Interest
11,350,954 shares
Previous Short Interest
10,071,976 shares
Change Vs. Previous Month
12.70%
Dollar Volume Sold Short
$1.14 billion
Short Interest Ratio
4.7 Days to Cover
Last Record Date
April 30, 2026
Outstanding Shares
1,254,960,000 shares
Short Percent of Float
0.90%
Today's Trading Volume
454,334 shares
Average Trading Volume
3,409,365 shares
Today's Volume Vs. Average
13%
Short Selling Rio Tinto?
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Short Interest ChartDays to Cover ChartShort Percent of Float Chart

RIO Short Interest Over Time

RIO Days to Cover Over Time

RIO Percentage of Float Shorted Over Time

Rio Tinto Tesla Short Interest History & Recent Changes

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Report DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date
4/30/202611,350,954 shares $1.14 billion +12.7%0.9%4.69 $100.51
4/15/202610,071,976 shares $993.19 million -0.8%0.8%4.05 $98.61
3/31/202610,150,098 shares $945.82 million -15.4%0.8%2.96 $93.18
3/13/202611,998,736 shares $1.05 billion +1.8%1.0%3.39 $87.83
2/27/202611,782,199 shares $1.17 billion -2.0%0.9%3.51 $99.30
2/13/202612,025,661 shares $1.18 billion -3.0%1.0%2.89 $98.03
1/30/202612,400,882 shares $1.13 billion -15.5%1.0%2.8 $91.09
1/15/202614,666,987 shares $1.27 billion -8.5%1.2%2.89 $86.34
12/31/202516,026,618 shares $1.28 billion +6.1%1.3%6.21 $80.03
12/15/202515,103,757 shares $1.15 billion +36.4%1.2%3.96 $75.82
11/28/202511,070,758 shares $798.64 million -11.3%0.9%4.88 $72.14
11/14/202512,475,930 shares $881.56 million +8.7%1.0%4.97 $70.66
10/31/202511,475,504 shares $824.84 million +1.6%0.9%3.32 $71.88
10/15/202511,290,000 shares $777.69 million +20.2%0.9%3.5 $68.88
9/30/20259,390,000 shares $619.65 million +48.1%N/A2.9 $65.99
9/15/20256,340,000 shares $403.54 million -23.2%N/A1.9 $63.65
8/31/20258,260,000 shares $517.89 million -2.5%0.7%2.5 $62.70
8/15/20258,470,000 shares $518.45 million -9.4%N/A2.4 $61.21
7/31/20259,350,000 shares $558.63 million +15.9%0.7%2.6 $59.75
7/15/20258,070,000 shares $472.05 million -10.6%N/A2.4 $58.50
6/30/20259,030,000 shares $526.90 million -7.3%0.7%2.6 $58.35
6/15/20259,740,000 shares $564.48 million +18.2%0.8%3 $57.96
5/31/20258,240,000 shares $489.79 million +4.7%0.7%2.6 $59.44
5/15/20257,870,000 shares $493.53 million +26.3%0.6%2.5 $62.71
4/30/20256,230,000 shares $369.69 million -1.6%N/A2 $59.34
4/15/20256,330,000 shares $361.80 million -15.4%0.5%1.9 $57.16
3/31/20257,480,000 shares $449.60 million -12.8%0.6%2.2 $60.11
3/15/20258,580,000 shares $541.22 million +3.5%0.7%2.8 $63.08
2/28/20258,290,000 shares $501.59 million +9.7%0.7%2.6 $60.51
2/15/20257,560,000 shares $479.12 million -11.5%0.6%2.5 $63.38
1/31/20258,540,000 shares $515.76 million +3.5%N/A2.8 $60.39
1/15/20258,250,000 shares $498.96 million -10.1%N/A2.9 $60.48
12/31/20249,180,000 shares $539.88 million +1.2%N/A3.2 $58.81
12/15/20249,070,000 shares $564.24 million +21.7%N/A3 $62.21
11/30/20247,450,000 shares $468.16 million -17.1%N/A2.6 $62.84
11/15/20248,990,000 shares $548.21 million -2.8%N/A3.2 $60.98
10/31/20249,250,000 shares $600.23 million -3.0%N/A3.3 $64.89
10/15/20249,540,000 shares $634.12 million +1.8%N/A3.3 $66.47
9/30/20249,370,000 shares $666.82 million +7.2%N/A3.3 $71.17
9/15/20248,740,000 shares $546.69 million -1.9%N/A3.4 $62.55
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6/30/20247,860,000 shares $518.21 million +2.5%N/A3.2 $65.93
6/15/20247,670,000 shares $510.13 million -0.1%N/A2.9 $66.51
5/31/20247,680,000 shares $538.21 million +0.3%N/A2.6 $70.08
5/15/20247,660,000 shares $538.77 million +11.5%N/A2.5 $70.34
4/30/20246,870,000 shares $465.99 million +25.4%N/A2.3 $67.83
4/15/20245,480,000 shares $365.95 million -3.0%N/A1.8 $66.78
3/31/20245,650,000 shares $360.13 million -9.6%N/A1.9 $63.74
3/15/20246,250,000 shares $388.50 million -7.1%N/A2.3 $62.16
2/29/20246,730,000 shares $434.29 million -4.9%N/A2.5 $64.53
2/15/20247,080,000 shares $478.18 million +18.0%N/A2.6 $67.54
1/31/20246,000,000 shares $415.74 million +6.6%N/A2.3 $69.29
1/15/20245,630,000 shares $395.11 million +0.9%N/A2 $70.18
12/31/20235,580,000 shares $415.49 million -10.0%N/A1.9 $74.46
12/15/20236,200,000 shares $449.19 million -5.1%N/A2 $72.45
11/30/20236,530,000 shares $451.16 million -6.2%N/A2.1 $69.09
11/15/20236,960,000 shares $472.34 million -13.4%N/A2.3 $67.87
10/31/20238,040,000 shares $517.29 million -11.3%N/A2.5 $64.34
10/15/20239,060,000 shares $565.16 million -15.3%N/A2.8 $62.38
9/30/202310,700,000 shares $680.95 million -9.3%N/A3.6 $63.64
9/15/202311,790,000 shares $776.37 million +3.8%N/A4.2 $65.85
8/31/202311,360,000 shares $710 million +24.4%N/A4 $62.50
8/15/20239,130,000 shares $536.20 million +19.7%N/A2.9 $58.73
7/31/20237,630,000 shares $507.85 million +2.3%N/A2.5 $66.56
7/15/20237,460,000 shares $511.23 million +0.8%N/A2.3 $68.53
6/30/20237,400,000 shares $472.38 million +5.7%N/A2.3 $63.84
6/15/20237,000,000 shares $478.45 million -3.9%N/A2.1 $68.35
5/31/20237,280,000 shares $429.81 million +13.8%N/A2 $59.04
5/15/20236,400,000 shares $402.62 million -11.0%N/A1.8 $62.91
4/30/20237,190,000 shares $460.09 million -11.2%N/A2.1 $63.99
4/15/20238,100,000 shares $555.50 million +12.3%N/A2.4 $68.58
3/31/20237,210,000 shares $494.61 million -26.8%N/A2.2 $68.60
3/15/20239,850,000 shares $648.82 million -8.9%N/A3.1 $65.87
2/28/202310,810,000 shares $753.78 million +1.3%N/A3.7 $69.73
2/15/202310,670,000 shares $794.17 million -2.7%N/A3.7 $74.43
1/31/202310,970,000 shares $870.47 million -13.9%N/A3.6 $79.35
1/15/202312,740,000 shares $987.99 million +1.0%N/A3.7 $77.55
12/30/202212,610,000 shares $897.83 million -7.8%N/A3.5 $71.20
12/15/202213,670,000 shares $963.05 million +2.2%N/A3.4 $70.45
11/30/202213,370,000 shares $917.72 million -0.8%N/A3.1 $68.64
11/15/202213,480,000 shares $879.97 million +15.7%N/A3.2 $65.28
10/31/202211,650,000 shares $621.53 million -1.4%N/A2.7 $53.35
10/15/202211,820,000 shares $634.85 million +8.2%N/A3 $53.71
9/30/202210,920,000 shares $601.26 million -26.3%N/A2.8 $55.06
9/15/202214,820,000 shares $820.29 million +6.4%N/A4.1 $55.35
8/31/202213,930,000 shares $784.12 million +1.5%N/A3.9 $56.29
8/15/202213,730,000 shares $803.34 million -10.8%N/A3.9 $58.51
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7/31/202215,400,000 shares $939.86 million -2.6%N/A4.5 $61.03
7/15/202215,810,000 shares $876.03 million +8.2%N/A4.4 $55.41
6/30/202214,610,000 shares $891.21 million +11.0%N/A4.1 $61.00
6/15/202213,160,000 shares $914.88 million +1.2%N/A3.9 $69.52
5/31/202213,000,000 shares $954.72 million +8.5%N/A3.4 $73.44
5/15/202211,980,000 shares $788.40 million +15.9%N/A2.7 $65.81
4/30/202210,340,000 shares $735.38 million +7.6%N/A2.3 $71.12
4/15/20229,610,000 shares $786.77 million -12.6%N/A2.1 $81.87
3/31/202211,000,000 shares $884.40 million -6.6%N/A2.2 $80.40
3/15/202211,780,000 shares $813.76 million -10.6%N/A2.4 $69.08
2/28/202213,170,000 shares $1.03 billion -1.1%N/A2.9 $78.58
2/15/202213,320,000 shares $1.03 billion -6.0%N/A3.2 $77.13
1/31/202214,170,000 shares $1.01 billion -3.0%N/A3.5 $71.40
1/15/202214,610,000 shares $1.10 billion +10.4%N/A3.9 $75.40
12/31/202113,230,000 shares $885.62 million -6.2%N/A3.8 $66.94
12/15/202114,110,000 shares $910.80 million +8.7%N/A4 $64.55
11/30/202112,980,000 shares $813.72 million -1.7%N/A3.3 $62.69
11/15/202113,200,000 shares $813.38 million +5.1%N/A3.7 $61.62
10/29/202112,560,000 shares $794.67 million +2.0%N/A3.6 $63.27
10/15/202112,320,000 shares $867.70 million +8.3%N/A3.7 $70.43
9/30/202111,380,000 shares $760.41 million -0.9%N/A3.7 $66.82
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8/31/202111,500,000 shares $863.31 million -9.6%N/A5 $75.07
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5/28/20219,570,000 shares $836.71 million -6.3%N/A3.7 $87.43

RIO Short Interest - Frequently Asked Questions

Short interest is the volume of Rio Tinto shares that have been sold short but have not yet been closed out or covered. As of April 30th, investors have sold 11,350,954 shares of RIO short. 0.90% of Rio Tinto's shares are currently sold short. Learn More on Rio Tinto's current short interest.

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. RIO shares currently have a short interest ratio of 4.7. Learn More on Rio Tinto's short interest ratio.

As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Rio Tinto: Hsbc Holdings PLC. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission.

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. 0.90% of Rio Tinto's floating shares are currently sold short.

Rio Tinto saw a increase in short interest in the month of April. As of April 30th, there was short interest totaling 11,350,954 shares, an increase of 12.7% from the previous total of 10,071,976 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.

0.90% of Rio Tinto's shares are currently sold short. Here is how the short interest of companies in the sector of "basic materials" compare to Rio Tinto: Buenaventura Mining Company Inc. (2.55%), BHP Group Limited Sponsored ADR (0.62%), Wheaton Precious Metals Corp. (0.86%), Cameco Corporation (1.34%), Teck Resources Ltd (1.60%), Reliance, Inc. (1.78%), MP Materials Corp. (16.45%), HudBay Minerals Inc (2.19%), Sibanye Gold Limited (1.43%), NexGen Energy (6.99%),

As of the most recent reporting period, the following stocks had the largest short interest positions: SPDR S&P 500 ETF Trust ($86.09 billion), Invesco QQQ ($39.89 billion), iShares Russell 2000 ETF ($26.13 billion), Western Digital Corporation ($12.66 billion), Salesforce Inc. ($12.29 billion), Sandisk Corporation ($11.87 billion), SPDR S&P Biotech ETF ($9.82 billion), Lumentum Holdings Inc. ($8.51 billion), iShares 20+ Year Treasury Bond ETF ($7.76 billion), and Bloom Energy Corporation ($7.40 billion). View all of the most shorted stocks.

Short selling RIO is an investing strategy that aims to generate trading profit from Rio Tinto as its price is falling. RIO shares are trading up $2.33 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.

A short squeeze for Rio Tinto 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 RIO, which in turn drives the price of the stock up even further.

Short interest is typically published by a stock exchange once per month. However, NASDAQ publishes a report for U.S. stocks, including RIO, twice per month. The most recent reporting period available is April, 30 2026.

Understanding short interest metrics can help you assess how traders are positioning around a stock like RIO:

  • Shares Sold Short: The total number of shares that have been sold by short sellers but have not yet been covered or closed out. A high number may indicate bearish sentiment.
  • Short Float: The percentage of a company’s publicly available shares (or "float") that are sold short. A higher short float suggests a greater portion of the stock is being bet against.
  • Days to Cover (Short Interest Ratio): This estimates how many days it would take short sellers to cover their positions, based on average daily trading volume. Higher values can signal potential for a short squeeze if buying pressure increases.

These metrics are often used by traders to gauge sentiment, volatility risk, and the potential for price movements based on short covering activity.


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This page (NYSE:RIO) was last updated on 5/21/2026 by MarketBeat.com Staff.
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