Constellium (CSTM) Short Interest Ratio & Short Volume $14.20 -0.24 (-1.66%) As of 03:00 PM Eastern This is a fair market value price provided by Polygon.io. Learn more. Add Compare Share Share Short Interest Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFinancialsHeadlinesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock Constellium Short Interest DataConstellium (CSTM) has a short interest of 3.80 million shares, representing 3.03% of the float (the number of shares available for trading by the public). This marks a -10.80% decrease in short interest from the previous month. The short interest ratio (days to cover) is 2.4, indicating that it would take 2.4 days of the average trading volume of 1.60 million shares to cover all short positions.Current Short Interest3,800,000 sharesPrevious Short Interest4,260,000 sharesChange Vs. Previous Month-10.80%Dollar Volume Sold Short$52.02 millionShort Interest Ratio2.4 Days to CoverLast Record DateJuly 31, 2025Outstanding Shares139,539,000 sharesFloat Size125,370,000 sharesShort Percent of Float3.03%Today's Trading Volume360,013 sharesAverage Trading Volume1,596,984 sharesToday's Volume Vs. Average23% Short Selling Constellium? Sign up to receive the latest short interest report for Constellium and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartCSTM Short Interest Over TimeCSTM Days to Cover Over TimeCSTM Percentage of Float Shorted Over Time Constellium Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 7/31/20253,800,000 shares $52.02 million -10.8%3.0%2.4 $13.69 7/15/20254,260,000 shares $58.19 million +19.0%3.3%2.6 $13.66 6/30/20253,580,000 shares $47.65 million -7.5%2.8%2 $13.31 6/15/20253,870,000 shares $52.86 million +28.6%3.0%2.2 $13.66 5/31/20253,010,000 shares $36.57 million +49.0%2.3%1.7 $12.15 5/15/20252,020,000 shares $24.24 million +25.5%1.6%1.2 $12.00 4/30/20251,610,000 shares $16.45 million -5.9%1.3%0.9 $10.22 4/15/20251,710,000 shares $14.34 million +3.6%1.3%1 $8.39 3/31/20251,650,000 shares $16.67 million -13.2%1.3%1.1 $10.11 3/15/20251,900,000 shares $23.17 million +24.2%1.5%1.3 $12.20 Get the Latest News and Ratings for CSTM and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Constellium and its competitors with MarketBeat's FREE daily newsletter. 2/28/20251,530,000 shares $17.42 million -22.7%1.2%1.1 $11.38 2/15/20251,980,000 shares $18.48 million -15.4%1.5%1.6 $9.34 1/31/20252,340,000 shares $23.24 million -13.7%1.8%2 $9.93 1/15/20252,710,000 shares $29.35 million -0.4%2.1%1.8 $10.83 12/31/20242,720,000 shares $27.93 million +3.0%2.1%1.8 $10.27 12/15/20242,640,000 shares $29.46 million +16.8%2.0%1.7 $11.16 11/30/20242,260,000 shares $27.71 million -22.6%1.7%1.5 $12.26 11/15/20242,920,000 shares $33.46 million +24.8%2.2%1.9 $11.46 10/31/20242,340,000 shares $25.97 million -5.3%1.8%1.6 $11.10 10/15/20242,470,000 shares $35.86 million -5.4%1.9%1.9 $14.52 9/30/20242,610,000 shares $42.44 million -14.4%2.0%2.2 $16.26 9/15/20243,050,000 shares $50.54 million -0.3%2.3%2.7 $16.57 8/31/20243,060,000 shares $51.32 million -12.3%2.3%2.6 $16.77 8/15/20243,490,000 shares $55.94 million -6.2%2.6%2.9 $16.03 7/31/20243,720,000 shares $66.27 million +15.2%2.8%3 $17.82 7/15/20243,230,000 shares $62.11 million +8.0%2.5%2.7 $19.23 6/30/20242,990,000 shares $56.36 million -8.3%2.3%2.9 $18.85 6/15/20243,260,000 shares $64.61 million +67.2%2.5%3.5 $19.82 5/31/20241,950,000 shares $42.27 million +7.7%1.5%2.2 $21.68 5/15/20241,810,000 shares $36.54 million -27.6%1.4%2.3 $20.19 4/30/20242,500,000 shares $49.23 million +15.7%2.0%3.1 $19.69 4/15/20242,160,000 shares $45.36 million +16.8%1.7%2.8 $21.00 3/31/20241,850,000 shares $40.90 million +6.3%1.5%2.7 $22.11 3/15/20241,740,000 shares $34.48 million +8.8%1.4%2.6 $19.82 2/29/20241,600,000 shares $31.02 million +3.2%1.3%2.4 $19.39 2/15/20241,550,000 shares $29.79 million +14.0%1.2%2.4 $19.22 1/31/20241,360,000 shares $25.51 million -8.1%1.1%2.2 $18.76 1/15/20241,480,000 shares $27.00 million -5.1%1.2%2 $18.24 12/31/20231,560,000 shares $31.14 million -3.7%1.3%2.1 $19.96 12/15/20231,620,000 shares $30.70 million +7.3%1.3%2 $18.95Musk’s Project Colossus could mint millionaires (Ad)I predict this single breakthrough could make Elon the world’s first trillionaire — and mint more new millionaires than any tech advance in history. And for a limited time, you have the chance to claim a stake in this project, even though it’s housed inside Elon’s private company, xAI.All the details are waiting for you now — but you need to act before the September 1st funding windo 11/30/20231,510,000 shares $26.29 million -20.5%1.2%1.9 $17.41 11/15/20231,900,000 shares $34.12 million -8.2%1.5%2.4 $17.96 10/31/20232,070,000 shares $32.71 million +54.5%1.7%2.7 $15.80 10/15/20231,340,000 shares $22.30 million -20.7%1.1%2 $16.64 9/30/20231,690,000 shares $30.76 million +10.5%1.4%2.6 $18.20 9/15/20231,530,000 shares $26.82 million -2.6%1.2%2.6 $17.53 8/31/20231,570,000 shares $28.26 million +0.6%1.3%2.6 $18.00 8/15/20231,560,000 shares $26.68 million -9.8%1.3%2.5 $17.11 7/31/20231,730,000 shares $33.03 million -4.4%1.4%2.5 $19.09 7/15/20231,810,000 shares $32.18 million -3.2%1.4%2.4 $17.78 6/30/20231,870,000 shares $32.16 million -23.7%1.5%2.3 $17.20 6/15/20232,450,000 shares $41.11 million -6.1%2.0%3 $16.78 5/31/20232,610,000 shares $38.90 million +0.4%2.1%3 $14.91 5/15/20232,600,000 shares $40.17 million -1.1%2.1%2.7 $15.45 4/30/20232,630,000 shares $39.06 million +28.3%2.1%2.7 $14.85 4/15/20232,050,000 shares $29.73 million -20.5%1.6%2 $14.50 3/31/20232,580,000 shares $39.42 million +2.4%2.1%2.5 $15.28 3/15/20232,520,000 shares $34.95 million -6.7%2.0%2.6 $13.87 2/28/20232,700,000 shares $43.17 million +17.9%2.2%2.6 $15.99 2/15/20232,290,000 shares $33.37 million -11.6%1.9%2.3 $14.57 1/31/20232,590,000 shares $37.63 million +49.7%2.1%2.8 $14.53 1/15/20231,730,000 shares $23.44 million -9.4%1.4%1.8 $13.55 12/30/20221,910,000 shares $22.60 million -10.8%1.6%2 $11.83 12/15/20222,140,000 shares $24.48 million -13.7%1.7%2.2 $11.44 11/30/20222,480,000 shares $30.88 million -14.5%2.0%2.6 $12.45 11/15/20222,900,000 shares $36.22 million -17.6%2.4%3.2 $12.49 10/31/20223,520,000 shares $38.79 million +0.9%2.9%4 $11.02 10/15/20223,490,000 shares $38.29 million +2.7%2.8%4.3 $10.97 9/30/20223,400,000 shares $34.48 million -1.2%3.2%4.3 $10.14 9/15/20223,440,000 shares $41.66 million -2.0%2.8%4 $12.11 8/31/20223,510,000 shares $46.75 million -2.5%2.9%3.9 $13.32 8/15/20223,600,000 shares $53.46 million -9.8%2.9%4 $14.85 7/31/20223,990,000 shares $58.37 million +9.9%3.2%4.2 $14.63 7/15/20223,630,000 shares $47.81 million -5.7%3.0%3.7 $13.17 6/30/20223,850,000 shares $50.86 million +3.5%3.1%4 $13.21 6/15/20223,720,000 shares $53.01 million -5.1%3.0%3.8 $14.25 5/31/20223,920,000 shares $66.21 million -21.9%3.2%4.5 $16.89 5/15/20225,020,000 shares $78.56 million +22.1%4.1%5.1 $15.65 4/30/20224,110,000 shares $68.60 million +17.8%3.3%4.3 $16.69 4/15/20223,490,000 shares $60.17 million +3.3%2.8%4 $17.24 3/31/20223,380,000 shares $60.84 million +12.3%2.7%4 $18.00 3/15/20223,010,000 shares $49.70 million +12.7%2.4%4 $16.51 2/28/20222,670,000 shares $51.88 million +6.4%2.2%3.7 $19.43 2/15/20222,510,000 shares $47.94 million +13.1%2.1%3.8 $19.10 1/31/20222,220,000 shares $38.83 million +0.5%1.8%3.5 $17.49 1/15/20222,210,000 shares $43.32 million +4.7%1.8%3 $19.60 12/31/20212,110,000 shares $37.79 million -15.9%1.7%2.7 $17.91 12/15/20212,510,000 shares $43.00 million -12.2%2.1%2.9 $17.13 11/30/20212,860,000 shares $50.25 million -24.9%2.4%3.3 $17.57 11/15/20213,810,000 shares $74.10 million -13.0%3.1%4.1 $19.45Musk’s Project Colossus could mint millionaires (Ad)I predict this single breakthrough could make Elon the world’s first trillionaire — and mint more new millionaires than any tech advance in history. And for a limited time, you have the chance to claim a stake in this project, even though it’s housed inside Elon’s private company, xAI.All the details are waiting for you now — but you need to act before the September 1st funding windo 10/29/20214,380,000 shares $80.64 million +9.0%3.6%4.5 $18.41 10/15/20214,020,000 shares $76.94 million +5.5%3.3%4.1 $19.14 9/30/20213,810,000 shares $71.55 million -0.5%3.1%3.8 $18.78 9/15/20213,830,000 shares $79.89 million -14.3%3.2%3.1 $20.86 8/31/20214,470,000 shares $90.38 million -2.2%3.7%3.5 $20.22 8/13/20214,570,000 shares $91.45 million +3.2%3.8%3.4 $20.01 7/30/20214,430,000 shares $83.59 million +2.3%3.7%3.4 $18.87 7/15/20214,330,000 shares $79.37 million -6.7%3.6%3.3 $18.33 6/30/20214,640,000 shares $87.93 million +102.6%3.8%3.6 $18.95 6/15/20212,290,000 shares $45.78 million +11.7%1.9%2.2 $19.99 5/28/20212,050,000 shares $36.61 million -5.1%1.7%1.8 $17.86 5/14/20212,160,000 shares $35.83 million -16.9%1.8%2 $16.59 4/30/20212,600,000 shares $41.24 million -3.4%2.1%2.4 $15.86 4/15/20212,690,000 shares $40.54 million +25.1%2.2%2.7 $15.07 3/31/20212,150,000 shares $31.65 million -19.8%1.8%2.2 $14.72 3/15/20212,680,000 shares $45.02 million +155.2%2.2%2.8 $16.80 2/26/20211,050,000 shares $14.27 million +1.0%0.9%1.3 $13.59 2/12/20211,040,000 shares $14.85 million -6.3%0.9%1.4 $14.28 1/29/20211,110,000 shares $14.32 million +33.1%0.9%1.4 $12.90 1/15/2021833,800 shares $12.17 million -57.5%0.7%1 $14.60 12/31/20201,960,000 shares $27.09 million -0.5%1.6%2.3 $13.82 12/15/20201,970,000 shares $26.10 million +19.4%1.6%2.2 $13.25 11/30/20201,650,000 shares $21.27 million -7.3%1.4%1.7 $12.89 11/15/20201,780,000 shares $20.11 million -9.6%1.5%1.8 $11.30 10/30/20201,970,000 shares $18.30 million +10.7%1.6%2.1 $9.29 10/15/20201,780,000 shares $15.50 million -11.4%1.5%2 $8.71 9/30/20202,010,000 shares $15.78 million +21.1%1.7%2.1 $7.85 9/15/20201,660,000 shares $14.56 million -1.8%1.4%1.6 $8.77 8/31/20201,690,000 shares $13.54 million -2.9%1.4%1.5 $8.01 CSTM Short Interest - Frequently Asked Questions What is Constellium's current short interest? Short interest is the volume of Constellium shares that have been sold short but have not yet been closed out or covered. As of July 31st, investors have sold 3,800,000 shares of CSTM short. 3.03% of Constellium's shares are currently sold short. Learn More on Constellium's current short interest. What is a good short interest ratio for Constellium? 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. CSTM shares currently have a short interest ratio of 2.0. Learn More on Constellium's short interest ratio. Which institutional investors are shorting Constellium? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Constellium: Group One Trading LLC, Jane Street Group LLC, Walleye Capital LLC, and Walleye Trading LLC. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission. What is a good short interest percentage for Constellium? 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. 3.03% of Constellium's floating shares are currently sold short. Is Constellium's short interest increasing or decreasing? Constellium saw a decline in short interest in July. As of July 31st, there was short interest totaling 3,800,000 shares, a decline of 10.8% from the previous total of 4,260,000 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. What is Constellium's float size? Constellium currently has issued a total of 139,539,000 shares. Some of Constellium's outstanding shares are available for trading, while others are subject to various restrictions. The public float, also referred to as floating shares or "the float", are shares that publicly owned, unrestricted and available to trade on the open market. Constellium currently has a public float of 125,370,000 shares. How does Constellium's short interest compare to its competitors? 3.03% of Constellium's shares are currently sold short. Here is how the short interest of companies compare to Constellium: Kaiser Aluminum Corporation (2.88%), Ternium S.A. (0.58%), Gerdau S.A. (1.47%), National Steel Company (0.62%), Worthington Steel, Inc. (2.30%), Steel Partners Holdings L.P. (0.01%), Insteel Industries, Inc. (1.97%), Metallus Inc. (5.73%), Algoma Steel Group Inc. (3.85%), United States Antimony Co. (14.19%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: SPDR S&P 500 ETF Trust ($70.87 billion), Invesco QQQ ($30.12 billion), iShares Russell 2000 ETF ($19.85 billion), iShares 20+ Year Treasury Bond ETF ($10.34 billion), MicroStrategy Incorporated ($8.98 billion), iShares iBoxx $ Investment Grade Corporate Bond ETF ($7.61 billion), SPDR S&P Biotech ETF ($6.81 billion), Invesco S&P 500 Equal Weight ETF ($6.14 billion), Palo Alto Networks, Inc. ($5.97 billion), and Super Micro Computer, Inc. ($5.28 billion). View all of the most shorted stocks. What does it mean to sell short Constellium stock? Short selling CSTM is an investing strategy that aims to generate trading profit from Constellium as its price is falling. CSTM shares are trading up $0.34 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 Constellium? A short squeeze for Constellium 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 CSTM, which in turn drives the price of the stock up even further. How often is Constellium'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 CSTM, twice per month. The most recent reporting period available is July, 31 2025. More Short Interest Resources from MarketBeat Related Companies KALU Short Squeeze TX Short Squeeze GGB Short Squeeze SID Short Squeeze WS Short Squeeze SPLP Short Squeeze IIIN Short Squeeze MTUS Short Squeeze ASTL Short Squeeze UAMY 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:CSTM) was last updated on 8/18/2025 by MarketBeat.com Staff From Our PartnersBiotech Alert: With news on MPox, RSV, and more, this tiny firm could disrupt a $3B marketA small biotech is stepping into the spotlight with a first-in-class antiviral platform—and it could be one of...Smallcaps Daily | SponsoredFormer CIA Officer Reveals How Gold Saved His Life This isn’t just another gold investing book—it’s a survival playbook written by a former CIA officer trained...Advantage Gold | SponsoredGENIUS Act: Cancel Your Money?A new law called the GENIUS Act could quietly trigger the most radical shift in American finance in decades. 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