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Kaiser Aluminum (KALU) Short Interest Ratio & Short Volume

Kaiser Aluminum logo
$188.69 +2.36 (+1.27%)
As of 02:08 PM Eastern
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Kaiser Aluminum Short Interest Overview

As of May 15, 2026, Kaiser Aluminum (KALU) had a short interest of 562,430 shares sold short, representing 3.49% of the public float. This marks a 10.93% increase in short interest since the prior report. The short interest ratio (days to cover) is 2.5, meaning it would take 2.5 days of the average trading volume of 237,322 shares to cover all short positions.

Current Short Interest
562,430 shares
Previous Short Interest
507,034 shares
Change Vs. Previous Month
10.93%
Dollar Volume Sold Short
$95.21 million
Short Interest Ratio
2.5 Days to Cover
Last Record Date
May 15, 2026
Outstanding Shares
16,341,000 shares
Short Percent of Float
3.49%
Today's Trading Volume
71,009 shares
Average Trading Volume
237,322 shares
Today's Volume Vs. Average
30%
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Short Interest ChartDays to Cover ChartShort Percent of Float Chart

KALU Short Interest Over Time

KALU Days to Cover Over Time

KALU Percentage of Float Shorted Over Time

Kaiser Aluminum 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
5/15/2026562,430 shares $95.21 million +10.9%3.5%2.49 $169.29
4/30/2026507,034 shares $86.41 million +8.1%3.1%1.34 $170.43
4/15/2026468,864 shares $64.72 million -0.3%2.9%2.27 $138.03
3/31/2026470,136 shares $56.66 million -0.9%2.9%1.83 $120.51
3/13/2026474,372 shares $55.77 million -12.2%3.0%2.42 $117.57
2/27/2026540,214 shares $70.30 million -9.8%3.4%2.02 $130.14
2/13/2026599,106 shares $84.12 million +17.9%3.7%2.71 $140.41
1/30/2026508,005 shares $62.29 million +11.6%3.2%3.17 $122.62
1/15/2026455,300 shares $59.74 million -0.7%2.8%2.51 $131.22
12/31/2025458,389 shares $52.65 million -14.6%2.9%2.13 $114.86
12/15/2025536,989 shares $59.02 million +4.6%3.4%2.68 $109.91
11/28/2025513,563 shares $56.45 million -0.2%3.2%3.92 $109.91
11/14/2025514,370 shares $46.92 million +4.7%3.2%3.41 $91.22
10/31/2025491,449 shares $44.49 million -19.5%3.1%1.8 $90.53
10/15/2025610,600 shares $48.85 million -3.0%3.9%4.8 $80.00
9/30/2025629,400 shares $48.56 million +16.2%4.0%5.7 $77.16
9/15/2025541,900 shares $41.92 million -2.8%3.4%4.6 $77.36
8/31/2025557,300 shares $43.40 million +4.6%3.5%4.6 $77.87
8/15/2025532,700 shares $40.11 million +17.0%3.4%4.3 $75.30
7/31/2025455,300 shares $35.20 million -1.5%2.9%3.6 $77.31
7/15/2025462,300 shares $40.50 million +16.7%2.9%3.2 $87.61
6/30/2025396,000 shares $31.64 million +14.4%2.5%2.5 $79.90
6/15/2025346,300 shares $26.41 million -21.6%2.2%2.1 $76.27
5/31/2025441,900 shares $32.16 million +8.9%2.8%2.7 $72.77
5/15/2025405,800 shares $29.09 million -7.1%2.6%2.4 $71.69
4/30/2025436,800 shares $28.16 million +27.8%2.8%2.6 $64.46
4/15/2025341,900 shares $18.67 million -36.1%2.2%2.2 $54.61
3/31/2025535,000 shares $32.43 million -6.9%3.4%4.2 $60.62
3/15/2025574,500 shares $40.40 million +27.4%3.7%5.4 $70.33
2/28/2025450,800 shares $31.90 million -3.2%2.9%4.5 $70.76
2/15/2025465,600 shares $32.71 million +16.7%3.0%4.9 $70.25
1/31/2025399,100 shares $27.94 million -10.3%2.5%4.1 $70.00
1/15/2025444,900 shares $32.66 million +11.4%2.8%3.5 $73.42
12/31/2024399,500 shares $28.07 million -10.4%2.5%2.9 $70.27
12/15/2024446,000 shares $34.01 million -2.3%2.8%3.2 $76.26
11/30/2024456,500 shares $37.10 million -2.5%2.9%3.3 $81.28
11/15/2024468,300 shares $37.76 million -1.4%3.0%3.2 $80.63
10/31/2024474,700 shares $35.25 million +5.7%3.0%3.4 $74.26
10/15/2024449,100 shares $32.14 million +19.2%2.9%3.3 $71.57
9/30/2024376,800 shares $27.33 million -13.0%2.4%2.9 $72.52
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9/15/2024432,900 shares $29.82 million +5.0%2.8%3.1 $68.89
8/31/2024412,400 shares $30.74 million -14.6%2.6%3 $74.55
8/15/2024482,800 shares $33.92 million +11.1%3.1%3.4 $70.25
7/31/2024434,600 shares $34.20 million -29.8%2.8%3 $78.69
7/15/2024619,300 shares $59.07 million -5.4%3.9%4.1 $95.38
6/30/2024654,400 shares $57.52 million +22.8%4.2%4.3 $87.90
6/15/2024533,100 shares $47.55 million +2.0%3.4%3.5 $89.20
5/31/2024522,700 shares $51.12 million +13.5%3.3%3.1 $97.80
5/15/2024460,500 shares $46.60 million +10.1%2.9%2.7 $101.20
4/30/2024418,400 shares $37.86 million +9.2%2.7%2.4 $90.49
4/15/2024383,300 shares $34.05 million +9.0%2.5%2.6 $88.83
3/31/2024351,600 shares $31.42 million -36.3%2.3%2.5 $89.36
3/15/2024551,500 shares $43.18 million +29.5%3.5%4.3 $78.30
2/29/2024426,000 shares $30.89 million -3.5%2.7%3.4 $72.52
2/15/2024441,600 shares $28.95 million +2.4%2.8%3.6 $65.55
1/31/2024431,100 shares $27.98 million -3.1%2.7%3.8 $64.90
1/15/2024444,800 shares $28.40 million +6.0%3.5%3.7 $63.85
12/31/2023419,800 shares $29.89 million +8.1%2.7%3.7 $71.19
12/15/2023388,200 shares $26.09 million -0.2%2.5%3.4 $67.22
11/30/2023388,800 shares $22.74 million -4.9%2.5%4.1 $58.48
11/15/2023408,800 shares $25.45 million +2.5%2.6%4.6 $62.26
10/31/2023398,800 shares $22.65 million +5.2%2.5%4.7 $56.80
10/15/2023379,200 shares $25.44 million -7.7%2.4%4.7 $67.08
9/30/2023410,700 shares $30.91 million -13.8%2.6%5 $75.26
9/15/2023476,400 shares $36.84 million +9.1%3.0%5.7 $77.32
8/31/2023436,500 shares $33.14 million -8.0%2.8%5.1 $75.92
8/15/2023474,600 shares $35.41 million -4.1%3.0%5.4 $74.60
7/31/2023494,900 shares $40.19 million -12.7%3.2%5.3 $81.20
7/15/2023566,600 shares $42.76 million +4.3%3.7%5.3 $75.47
6/30/2023543,200 shares $38.91 million -9.9%3.5%4.7 $71.64
6/15/2023602,700 shares $42.83 million -4.4%3.9%4.5 $71.07
5/31/2023630,300 shares $38.07 million +4.7%4.1%4.2 $60.40
5/15/2023602,100 shares $36.96 million +1.7%3.9%3.6 $61.39
4/30/2023592,100 shares $38.91 million +17.3%3.8%3.6 $65.72
4/15/2023504,800 shares $33.25 million +5.3%3.3%3.2 $65.86
3/31/2023479,600 shares $35.79 million +6.0%3.1%3.3 $74.63
3/15/2023452,600 shares $29.65 million +18.1%2.9%3.3 $65.51
2/28/2023383,400 shares $30.41 million -0.2%2.5%2.8 $79.32
2/15/2023384,100 shares $34.53 million +10.3%2.5%3 $89.91
1/31/2023348,300 shares $30.48 million -2.3%2.2%2.8 $87.52
1/15/2023356,300 shares $31.49 million +2.5%2.3%2.7 $88.38
12/30/2022347,600 shares $26.40 million -31.4%2.2%2.5 $75.96
12/15/2022506,400 shares $39.38 million -14.4%3.3%3.4 $77.76
11/30/2022591,600 shares $53.48 million -10.7%3.8%4.4 $90.40
11/15/2022662,400 shares $62.91 million -8.9%4.3%4.9 $94.98
10/31/2022727,100 shares $58.74 million -7.6%4.7%5.2 $80.79
10/15/2022787,100 shares $51.49 million +8.8%5.1%4.9 $65.42
9/30/2022723,500 shares $44.39 million +14.2%4.7%4.4 $61.35
9/15/2022633,400 shares $46.99 million +5.4%4.1%3.7 $74.18
8/31/2022601,200 shares $43.14 million -10.2%3.9%3.6 $71.76
Read this warning immediately (Ad)

Porter Stansberry, founder of one of the world's largest financial research firms, says he's breaking the biggest story of his 26-year career. A famous historian whose books have sold over 45 million copies in 65 languages is warning of a structural shift so large it has only one historical parallel - 1776. One Stanford economist calls it 'the biggest change ever - bigger than electricity, bigger than the steam engine.' Stansberry outlines the stocks to buy, the stocks to sell, and three money moves to position yourself on the right side of this shift.tc pixel

Read Porter Stansberry's full breakdown and protect your wealth now
8/15/2022669,800 shares $52.31 million +10.4%4.3%4 $78.10
7/31/2022607,000 shares $45.99 million +1.9%3.9%3.5 $75.77
7/15/2022595,800 shares $44.56 million +0.3%3.8%3.5 $74.79
6/30/2022594,100 shares $46.99 million -9.5%3.8%4 $79.09
6/15/2022656,700 shares $56.25 million +9.4%4.2%4.7 $85.66
5/31/2022600,200 shares $61.32 million +13.7%3.9%4.9 $102.17
5/15/2022527,800 shares $50.32 million +19.2%3.4%4.2 $95.34
4/30/2022442,900 shares $42.74 million +21.9%2.9%3.9 $96.50
4/15/2022363,200 shares $36.50 million -11.4%2.3%3.3 $100.49
3/31/2022410,000 shares $38.61 million +5.5%2.7%3.8 $94.16
3/15/2022388,700 shares $33.86 million -4.9%2.5%3.5 $87.12
2/28/2022408,600 shares $39.43 million +1.8%2.6%3.6 $96.50
2/15/2022401,300 shares $41.55 million +21.5%2.6%3.6 $103.53
1/31/2022330,400 shares $31.64 million +12.6%2.1%3 $95.75
1/15/2022293,400 shares $31.04 million -5.1%1.9%2.6 $105.80
12/31/2021309,200 shares $29.05 million -23.1%2.0%2.7 $93.94
12/15/2021402,200 shares $37.32 million +13.4%2.6%3.7 $92.78
11/30/2021354,600 shares $31.64 million +43.5%2.3%3.4 $89.23
11/15/2021247,200 shares $26.38 million -11.3%1.6%2.5 $106.70
10/29/2021278,800 shares $27.08 million -18.5%1.8%3 $97.14
10/15/2021342,100 shares $40.03 million +8.4%2.2%3.8 $117.00
9/30/2021315,700 shares $34.40 million -35.1%2.0%3.6 $108.96
9/15/2021486,300 shares $58.34 million -5.4%3.1%4.9 $119.97
8/31/2021514,000 shares $64.90 million +0.4%3.3%4.9 $126.26
8/13/2021511,900 shares $65.23 million +6.8%3.3%4.7 $127.43
7/30/2021479,400 shares $58.33 million -3.7%3.1%4.1 $121.68
7/15/2021497,800 shares $57.98 million +38.1%3.2%3.9 $116.47
6/30/2021360,400 shares $44.51 million -19.3%2.3%3.1 $123.49
6/15/2021446,300 shares $58.88 million +23.0%2.9%4.1 $131.92

KALU Short Interest - Frequently Asked Questions

Short interest is the volume of Kaiser Aluminum shares that have been sold short but have not yet been covered or closed out. As of May 15th, investors have sold 562,430 shares of KALU short. 3.49% of Kaiser Aluminum's shares are currently sold short. Learn More on Kaiser Aluminum'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. KALU shares currently have a short interest ratio of 2.5. Learn More on Kaiser Aluminum'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. 3.49% of Kaiser Aluminum's floating shares are currently sold short.

Kaiser Aluminum saw a increase in short interest in the month of May. As of May 15th, there was short interest totaling 562,430 shares, an increase of 10.9% from the previous total of 507,034 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.

3.49% of Kaiser Aluminum's shares are currently sold short. Here is how the short interest of companies compare to Kaiser Aluminum: Steel Dynamics, Inc. (2.74%), Alcoa (2.25%), Commercial Metals Company (5.88%), Constellium SE (4.52%), Century Aluminum Company (8.34%), ESAB Corporation (4.60%), Ardagh Metal Packaging S.A. (1.15%), TriMas Corporation (14.84%), NWPX Infrastructure, Inc. (3.38%), GrafTech International Ltd. (2.28%),

As of the most recent reporting period, the following stocks had the largest short interest positions: SPDR S&P 500 ETF Trust ($80.71 billion), Invesco QQQ ($47.96 billion), iShares Russell 2000 ETF ($22.13 billion), Western Digital Corporation ($14.35 billion), Sandisk Corporation ($12.86 billion), Salesforce Inc. ($10.89 billion), Nebius Group N.V. ($9.92 billion), SPDR S&P Biotech ETF ($9.72 billion), Lumentum Holdings Inc. ($8.89 billion), and iShares 20+ Year Treasury Bond ETF ($8.18 billion). View all of the most shorted stocks.

Short selling KALU is an investing strategy that aims to generate trading profit from Kaiser Aluminum as its price is falling. KALU shares are trading up $1.18 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 Kaiser Aluminum 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 KALU, 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 KALU, twice per month. The most recent reporting period available is May, 15 2026.

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

  • 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 (NASDAQ:KALU) was last updated on 6/4/2026 by MarketBeat.com Staff.
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