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Pentair (PNR) Short Interest Ratio & Short Volume

Pentair logo
$56.56 -0.17 (-0.30%)
Closing price 09/11/2026 03:58 PM Eastern
Extended Trading
$56.52 -0.04 (-0.07%)
As of 09/11/2026 08:00 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 Massive. Learn more.
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Pentair Short Interest Overview

As of August 31, 2026, Pentair (PNR) had a short interest of 8.51 million shares sold short, representing 5.40% of the public float. This marks a 13.31% increase in short interest since the prior report. The short interest ratio (days to cover) is 1.9, meaning it would take 1.9 days of the average trading volume of 3.69 million shares to cover all short positions.

Current Short Interest
8,511,169 shares
Previous Short Interest
7,511,310 shares
Change Vs. Previous Month
13.31%
Dollar Volume Sold Short
$516.88 million
Short Interest Ratio
1.9 Days to Cover
Last Record Date
August 31, 2026
Outstanding Shares
159,638,000 shares
Short Percent of Float
5.40%
Today's Trading Volume
1,991,662 shares
Average Trading Volume
3,686,709 shares
Today's Volume Vs. Average
54%
Short Selling Pentair?
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Short Interest ChartDays to Cover ChartShort Percent of Float Chart

PNR Short Interest Over Time

PNR Days to Cover Over Time

PNR Percentage of Float Shorted Over Time

Pentair 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
8/31/20268,511,169 shares $516.88 million +13.3%5.4%1.86 $60.73
8/14/20267,511,310 shares $496.74 million +12.3%4.8%2.89 $66.13
7/31/20266,688,313 shares $437.82 million +6.7%4.2%1.72 $65.46
7/15/20266,267,759 shares $404.03 million -8.3%3.9%1.93 $64.46
6/30/20266,835,261 shares $524.31 million -3.4%4.3%2.86 $76.71
6/15/20267,077,903 shares $525.04 million +3.7%4.4%3.35 $74.18
5/29/20266,826,000 shares $483.98 million -3.5%4.3%2.66 $70.90
5/15/20267,072,681 shares $513.95 million +11.1%4.4%3.79 $72.67
4/30/20266,369,158 shares $514.48 million +23.8%4.0%2.61 $80.78
4/15/20265,146,511 shares $454.91 million +6.3%3.2%4 $88.39
3/31/20264,843,456 shares $421.84 million -2.5%3.0%3.2 $87.10
3/13/20264,969,458 shares $438.68 million +2.5%3.1%3.07 $88.28
2/27/20264,850,503 shares $480.30 million +8.7%3.0%3.17 $99.02
2/13/20264,462,020 shares $452.59 million +12.1%2.8%1.6 $101.43
1/30/20263,982,173 shares $419.60 million +11.5%2.5%2.54 $105.37
1/15/20263,572,207 shares $381.97 million +7.9%2.2%1.83 $106.93
12/31/20253,311,772 shares $344.99 million -5.4%2.1%3.51 $104.17
12/15/20253,500,256 shares $367.88 million -4.9%2.2%2.97 $105.10
11/28/20253,679,024 shares $387.18 million +11.7%2.3%2.65 $105.24
11/14/20253,292,900 shares $342.84 million -14.1%2.0%3.08 $104.12
10/31/20253,831,947 shares $407.26 million +101.4%2.4%2.58 $106.28
10/15/20251,900,000 shares $209.56 million -21.2%1.2%1.5 $110.29
9/30/20252,410,000 shares $266.88 million -27.6%1.5%1.7 $110.74
9/15/20253,330,000 shares $368.63 million +9.9%2.0%2.2 $110.70
8/31/20253,030,000 shares $325.73 million +6.7%1.9%2 $107.50
8/15/20252,840,000 shares $298.31 million +18.8%1.7%1.9 $105.04
7/31/20252,390,000 shares $244.30 million -10.8%1.5%1.6 $102.22
7/15/20252,680,000 shares $280.76 million -7.9%1.7%1.8 $104.76
6/30/20252,910,000 shares $298.86 million -0.3%1.8%2 $102.70
6/15/20252,920,000 shares $281.87 million +1.0%1.8%2 $96.53
5/31/20252,890,000 shares $286.34 million -1.0%1.8%1.8 $99.08
5/15/20252,920,000 shares $285.52 million -18.9%1.8%1.7 $97.78
4/30/20253,600,000 shares $326.88 million +1.7%2.2%2.1 $90.80
4/15/20253,540,000 shares $291.27 million +10.3%2.2%2 $82.28
3/31/20253,210,000 shares $280.94 million +39.0%2.0%2 $87.52
3/15/20252,310,000 shares $199.07 million No Change1.4%1.6 $86.18
2/28/20252,310,000 shares $217.80 million -7.2%1.4%1.7 $94.29
2/15/20252,490,000 shares $240.80 million -9.5%1.5%2 $96.71
1/31/20252,750,000 shares $285.06 million -2.1%1.7%2.2 $103.66
1/15/20252,810,000 shares $285.64 million +7.7%1.7%2.3 $101.65
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12/31/20242,610,000 shares $262.67 million +15.5%1.6%2 $100.64
12/15/20242,260,000 shares $242.18 million +12.4%1.4%1.6 $107.16
11/30/20242,010,000 shares $219.07 million -16.9%1.2%1.4 $108.99
11/15/20242,420,000 shares $256.33 million -23.2%1.5%1.7 $105.92
10/31/20243,150,000 shares $312.23 million +11.3%1.9%2.2 $99.12
10/15/20242,830,000 shares $278.73 million -16.0%1.7%2 $98.49
9/30/20243,370,000 shares $329.52 million +8.0%2.1%2.2 $97.78
9/15/20243,120,000 shares $285.45 million +9.9%1.9%2 $91.49
8/31/20242,840,000 shares $251.88 million -10.7%1.7%1.8 $88.69
8/15/20243,180,000 shares $269.47 million No Change1.9%1.9 $84.74
7/31/20243,180,000 shares $279.43 million +1.6%1.9%2 $87.87
7/15/20243,130,000 shares $250.56 million -39.3%1.9%1.9 $80.05
6/30/20245,160,000 shares $395.62 million +9.1%3.1%3.5 $76.67
6/15/20244,730,000 shares $365.77 million +17.7%2.9%3.3 $77.33
5/31/20244,020,000 shares $327.15 million -9.1%2.4%2.8 $81.38
5/15/20244,420,000 shares $376.05 million +28.9%2.7%3 $85.08
4/30/20243,430,000 shares $271.28 million +3.0%2.1%2.2 $79.09
4/15/20243,330,000 shares $267.53 million -27.0%2.0%2 $80.34
3/31/20244,560,000 shares $389.61 million +4.6%2.8%2.8 $85.44
3/15/20244,360,000 shares $351.55 million -1.6%2.7%2.7 $80.63
2/29/20244,430,000 shares $344.57 million +14.5%2.7%2.8 $77.78
2/15/20243,870,000 shares $291.88 million +6.9%2.4%2.6 $75.42
1/31/20243,620,000 shares $264.88 million +32.6%2.2%2.4 $73.17
1/15/20242,730,000 shares $193.20 million -22.2%1.7%1.9 $70.77
12/31/20233,510,000 shares $255.21 million +17.8%2.1%2.5 $72.71
12/15/20232,980,000 shares $211.37 million +30.7%1.8%2.1 $70.93
11/30/20232,280,000 shares $147.15 million -13.3%1.4%1.8 $64.54
11/15/20232,630,000 shares $168.24 million -8.0%1.6%2.2 $63.97
10/31/20232,860,000 shares $166.17 million +4.4%1.7%2.5 $58.10
10/15/20232,740,000 shares $171.00 million -9.6%1.7%2.4 $62.41
9/30/20233,030,000 shares $196.19 million -6.5%1.8%2.7 $64.75
9/15/20233,240,000 shares $216.63 million -7.7%2.0%2.9 $66.86
8/31/20233,510,000 shares $246.61 million -7.4%2.1%3 $70.26
8/15/20233,790,000 shares $261.62 million +1.3%2.3%3.1 $69.03
7/31/20233,740,000 shares $259.93 million -5.6%2.3%3 $69.50
7/15/20233,960,000 shares $260.85 million +9.7%2.4%3.1 $65.87
6/30/20233,610,000 shares $233.21 million -9.3%2.2%3 $64.60
6/15/20233,980,000 shares $242.82 million +8.5%2.4%3.2 $61.01
5/31/20233,670,000 shares $203.57 million -14.9%2.2%2.7 $55.47
5/15/20234,310,000 shares $254.81 million -21.8%2.6%3.1 $59.12
4/30/20235,510,000 shares $320.02 million -19.4%3.4%3.7 $58.08
4/15/20236,840,000 shares $362.11 million +4.9%4.2%4.3 $52.94
3/31/20236,520,000 shares $360.36 million -12.7%4.0%4 $55.27
3/15/20237,470,000 shares $386.05 million -5.4%4.6%4.5 $51.68
2/28/20237,900,000 shares $441.93 million +7.1%4.8%5 $55.94
2/15/20237,380,000 shares $420.14 million -4.3%4.5%4.9 $56.93
1/31/20237,710,000 shares $426.98 million +6.6%4.7%5.1 $55.38
1/15/20237,230,000 shares $365.26 million +5.2%4.4%4.7 $50.52
12/30/20226,870,000 shares $309.01 million +2.1%4.2%4.4 $44.98
12/15/20226,730,000 shares $299.55 million +1.8%4.1%4.3 $44.51
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11/30/20226,610,000 shares $302.54 million -2.4%4.0%4.2 $45.77
11/15/20226,770,000 shares $316.23 million -5.3%4.1%4.1 $46.71
10/31/20227,150,000 shares $307.09 million +11.5%4.4%4.5 $42.95
10/15/20226,410,000 shares $261.78 million -14.1%3.9%4.2 $40.84
9/30/20227,460,000 shares $303.10 million +2.1%4.6%5.2 $40.63
9/15/20227,310,000 shares $318.72 million +4.0%4.5%5.3 $43.60
8/31/20227,030,000 shares $312.84 million +6.2%4.3%5.2 $44.50
8/15/20226,620,000 shares $336.03 million +49.8%4.0%5.1 $50.76
7/31/20224,420,000 shares $216.09 million -6.0%2.7%3.2 $48.89
7/15/20224,700,000 shares $217.19 million -4.1%N/A3.3 $46.21
6/30/20224,900,000 shares $224.27 million -1.0%N/A3.5 $45.77
6/15/20224,950,000 shares $227.85 million -5.0%N/A3.4 $46.03
5/31/20225,210,000 shares $261.39 million +2.0%3.2%3.4 $50.17
5/15/20225,110,000 shares $255.60 million +1.8%3.1%3.3 $50.02
4/30/20225,020,000 shares $254.77 million -3.1%3.1%3.3 $50.75
4/15/20225,180,000 shares $271.59 million -5.8%3.1%3.4 $52.43
3/31/20225,500,000 shares $298.16 million +10.4%3.4%3.7 $54.21
3/15/20224,980,000 shares $273.10 million +8.7%3.0%3.6 $54.84
2/28/20224,580,000 shares $265.23 million +3.4%2.8%3.4 $57.91
2/15/20224,430,000 shares $263.94 million -20.2%2.7%3.4 $59.58
1/31/20225,550,000 shares $353.54 million +11.0%3.4%4.4 $63.70
1/15/20225,000,000 shares $330.55 million -15.7%3.0%4.2 $66.11
12/31/20215,930,000 shares $433.07 million +0.3%3.6%5.2 $73.03
12/15/20215,910,000 shares $435.74 million +5.2%3.6%5 $73.73
11/30/20215,620,000 shares $414.14 million -9.4%3.4%5 $73.69
11/15/20216,200,000 shares $472.44 million +2.3%3.8%5.4 $76.20
10/29/20216,060,000 shares $448.26 million -8.7%3.7%5.1 $73.97
10/15/20216,640,000 shares $477.28 million +25.8%4.0%5.5 $71.88
9/30/20215,280,000 shares $383.49 million +5.8%3.2%4.6 $72.63
9/15/20214,990,000 shares $388.07 million +18.3%3.0%4.6 $77.77

PNR Short Interest - Frequently Asked Questions

Short interest is the volume of Pentair shares that have been sold short but have not yet been closed out or covered. As of August 31st, traders have sold 8,511,169 shares of PNR short. 5.40% of Pentair's shares are currently sold short. Learn More on Pentair'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. PNR shares currently have a short interest ratio of 1.9. Learn More on Pentair's short interest ratio.

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. 5.40% of Pentair's floating shares are currently sold short.

Pentair saw a increase in short interest in the month of August. As of August 31st, there was short interest totaling 8,511,169 shares, an increase of 13.3% from the previous total of 7,511,310 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.

5.40% of Pentair's shares are currently sold short. Here is how the short interest of companies compare to Pentair: Pool Corporation (9.80%), Dover Corporation (3.79%), Greif, Inc. (2.64%), Graco Inc. (4.06%), Hayward Holdings, Inc. (4.47%), Ingersoll Rand Inc. (3.43%), Illinois Tool Works Inc. (3.10%), Masco Corporation (4.22%), Parker-Hannifin Corporation (1.05%), Stanley Black & Decker, Inc. (4.67%),

As of the most recent reporting period, the following stocks had the largest short interest positions: SPDR S&P 500 ETF Trust ($62.68 billion), Invesco QQQ ($47.06 billion), iShares Russell 2000 ETF ($23.54 billion), SPDR S&P Biotech ETF ($12.10 billion), Nebius Group N.V. ($9.34 billion), Western Digital Corporation ($8.96 billion), Financial Select Sector SPDR Fund ($8.16 billion), iShares 20+ Year Treasury Bond ETF ($7.98 billion), iShares iBoxx $ High Yield Corporate Bond ETF ($7.52 billion), and VanEck Semiconductor ETF ($7.39 billion). View all of the most shorted stocks.

Short selling PNR is an investing strategy that aims to generate trading profit from Pentair as its price is falling. PNR shares are trading down $0.17 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 Pentair 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 PNR, 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 PNR, twice per month. The most recent reporting period available is August, 31 2026.

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

  • 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.


Related Companies
Short Interest Tools

Short interest data for NYSE:PNR is sourced from the Financial Industry Regulatory Authority (FINRA), with the most recent report published on 9/10/2026. FINRA publishes updated short interest twice a month.
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