Century Aluminum (CENX) Short Interest Ratio & Short Volume $15.80 -0.37 (-2.29%) Closing price 05/21/2025 04:00 PM EasternExtended Trading$15.75 -0.05 (-0.32%) As of 04:00 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. Add Compare Share Share Short Interest Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestSustainabilityTrendsBuy This Stock Century Aluminum Short Interest DataCentury Aluminum (CENX) has a short interest of 5.18 million shares, representing 10.09% of the float (the number of shares available for trading by the public). This marks a -11.00% decrease in short interest from the previous month. The short interest ratio (days to cover) is 2.7, indicating that it would take 2.7 days of the average trading volume of 1.40 million shares to cover all short positions.Current Short Interest5,180,000 sharesPrevious Short Interest5,820,000 sharesChange Vs. Previous Month-11.00%Dollar Volume Sold Short$85.00 millionShort Interest Ratio2.7 Days to CoverLast Record DateApril 30, 2025Outstanding Shares93,303,000 sharesFloat Size51,360,000 sharesShort Percent of Float10.09%Today's Trading Volume1,134,021 sharesAverage Trading Volume1,401,780 sharesToday's Volume Vs. Average81% Short Selling Century Aluminum? Sign up to receive the latest short interest report for Century Aluminum and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartCENX Short Interest Over TimeCENX Days to Cover Over TimeCENX Percentage of Float Shorted Over Time Century Aluminum Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 4/30/20255,180,000 shares $85.00 million -11.0%10.1%2.7 $16.41 4/15/20255,820,000 shares $91.55 million +9.2%11.5%3 $15.73 3/31/20255,330,000 shares $98.92 million +14.9%10.5%2.9 $18.56 3/15/20254,640,000 shares $92.57 million -9.2%9.1%2.8 $19.95 2/28/20255,110,000 shares $96.83 million +6.2%10.1%3.4 $18.95 2/15/20254,810,000 shares $100.72 million +11.9%9.4%3.4 $20.94 1/31/20254,300,000 shares $78.60 million -12.8%8.4%3.5 $18.28 1/15/20254,930,000 shares $100.52 million +4.2%9.7%4.3 $20.39 12/31/20244,730,000 shares $86.18 million +0.6%9.3%4.3 $18.22 12/15/20244,700,000 shares $98.09 million +11.1%9.1%4.4 $20.87 Get the Latest News and Ratings for CENX and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Century Aluminum and its competitors with MarketBeat's FREE daily newsletter. 11/30/20244,230,000 shares $96.57 million -11.9%8.2%3.9 $22.83 11/15/20244,800,000 shares $108.58 million +1.5%9.3%4.4 $22.62 10/31/20244,730,000 shares $83.48 million -13.7%9.2%4.4 $17.65 10/15/20245,480,000 shares $95.30 million -4.7%10.6%5.1 $17.39 9/30/20245,750,000 shares $93.32 million +2.9%11.2%4.7 $16.23 9/15/20245,590,000 shares $76.25 million -4.0%10.9%4.2 $13.64 8/31/20245,820,000 shares $83.58 million +10.0%11.3%4.2 $14.36 8/15/20245,290,000 shares $71.73 million +11.4%10.3%3.8 $13.56 7/31/20244,750,000 shares $71.77 million -16.1%9.2%3.3 $15.11 7/15/20245,660,000 shares $109.24 million +6.0%11.0%4 $19.30 6/30/20245,340,000 shares $89.45 million -28.5%10.4%3.8 $16.75 6/15/20247,470,000 shares $113.84 million +9.5%14.5%5.2 $15.24 5/31/20246,820,000 shares $125.01 million -8.3%13.3%4.9 $18.33 5/15/20247,440,000 shares $130.72 million -3.9%14.5%5.2 $17.57 4/30/20247,740,000 shares $134.29 million +7.4%15.1%5.3 $17.35 4/15/20247,210,000 shares $127.98 million -1.0%14.1%5.1 $17.75 3/31/20247,280,000 shares $112.04 million +3.6%14.3%5.1 $15.39 3/15/20247,030,000 shares $84.78 million +2.3%13.8%4.9 $12.06 2/29/20246,870,000 shares $71.93 million -9.8%13.4%4.3 $10.47 2/15/20247,620,000 shares $81.38 million -7.6%14.9%4.7 $10.68 1/31/20248,250,000 shares $91.99 million -9.4%16.1%5.2 $11.15 1/15/20249,110,000 shares $99.21 million -8.7%17.8%5.7 $10.89 12/31/20239,980,000 shares $121.16 million -8.9%19.5%6.6 $12.14 12/15/202310,950,000 shares $106.65 million +5.8%21.1%7.9 $9.74 11/30/202310,350,000 shares $81.35 million +4.6%20.0%8.8 $7.86 11/15/20239,900,000 shares $74.94 million -1.2%19.1%8.7 $7.57 10/31/202310,020,000 shares $66.23 million +1.8%19.4%9 $6.61 10/15/20239,840,000 shares $64.06 million +4.7%19.0%9.5 $6.51 9/30/20239,400,000 shares $67.59 million +26.3%18.2%8.3 $7.19 9/15/20237,440,000 shares $55.95 million +12.2%9.4%6.6 $7.52The Secret Map of America, Declassified… (Ad)Locked inside a Maryland man’s private safe is a map. But not just any map, mind you… This map shows a “secret America” — an America first envisioned by President Harry Truman in 1946, and then classified by the government for decades. Click here to view the secret map now >> 8/31/20236,630,000 shares $49.33 million -3.9%8.4%5.5 $7.44 8/15/20236,900,000 shares $53.82 million +9.4%8.7%5.8 $7.80 7/31/20236,310,000 shares $58.68 million -6.5%8.0%5.1 $9.30 7/15/20236,750,000 shares $58.93 million +5.0%8.6%5.2 $8.73 6/30/20236,430,000 shares $56.07 million -12.2%8.2%5.1 $8.72 6/15/20237,320,000 shares $71.88 million -5.2%9.3%5.8 $9.82 5/31/20237,720,000 shares $60.52 million -1.3%9.8%5.7 $7.84 5/15/20237,820,000 shares $59.74 million +7.9%9.9%5.2 $7.64 4/30/20237,250,000 shares $62.28 million +14.4%9.2%4.5 $8.59 4/15/20236,340,000 shares $59.91 million -3.9%8.1%3.6 $9.45 3/31/20236,600,000 shares $66 million +5.8%8.4%3.6 $10.00 3/15/20236,240,000 shares $56.53 million +6.3%7.9%3.2 $9.06 2/28/20235,870,000 shares $70.85 million +3.2%7.5%3 $12.07 2/15/20235,690,000 shares $61.28 million +4.0%7.3%3 $10.77 1/31/20235,470,000 shares $61.48 million +1.5%7.0%2.7 $11.24 1/15/20235,390,000 shares $53.95 million +8.5%6.9%2.8 $10.01 12/30/20224,970,000 shares $40.65 million -15.2%6.4%2.4 $8.18 12/15/20225,860,000 shares $43.07 million +12.9%7.5%2.6 $7.35 11/30/20225,190,000 shares $46.76 million -15.9%10.2%2.4 $9.01 11/15/20226,170,000 shares $56.58 million -10.7%12.1%2.8 $9.17 10/31/20226,910,000 shares $49.82 million +15.9%13.5%3.2 $7.21 10/15/20225,960,000 shares $34.33 million +5.3%11.8%2.9 $5.76 9/30/20225,660,000 shares $29.88 million +7.4%11.2%2.9 $5.28 9/15/20225,270,000 shares $39.00 million -2.2%10.4%2.6 $7.40 8/31/20225,390,000 shares $41.61 million -4.9%10.7%2.4 $7.72 8/15/20225,670,000 shares $50.41 million -19.7%11.2%2.4 $8.89 7/31/20227,060,000 shares $55.70 million -4.9%14.0%2.9 $7.89 7/15/20227,420,000 shares $53.28 million +4.5%14.7%2.9 $7.18 6/30/20227,100,000 shares $52.33 million +20.8%14.1%2.8 $7.37 6/15/20225,880,000 shares $62.27 million +3.3%11.7%2.4 $10.59 5/31/20225,690,000 shares $67.14 million +18.1%11.3%2.6 $11.80 5/15/20224,820,000 shares $61.65 million +15.9%9.6%2.1 $12.79 4/30/20224,160,000 shares $70.18 million -9.0%8.3%1.9 $16.87 4/15/20224,570,000 shares $125.26 million -9.9%9.1%2.2 $27.41 3/31/20225,070,000 shares $133.39 million -28.4%10.2%2.7 $26.31 3/15/20227,080,000 shares $159.94 million +8.9%14.2%3.9 $22.59 2/28/20226,500,000 shares $153.53 million +9.2%13.0%3.9 $23.62 2/15/20225,950,000 shares $121.08 million +21.4%12.1%4.3 $20.35 1/31/20224,900,000 shares $75.17 million +16.4%10.0%3.8 $15.34 1/15/20224,210,000 shares $71.06 million +4.2%8.6%3.2 $16.88 12/31/20214,040,000 shares $66.90 million -1.2%8.2%3 $16.56 12/15/20214,090,000 shares $54.36 million -2.4%8.2%2.9 $13.29 11/30/20214,190,000 shares $55.43 million +2.4%8.4%2.8 $13.23 11/15/20214,090,000 shares $62.74 million -9.1%8.2%2.6 $15.34 10/29/20214,500,000 shares $59.45 million +0.7%9.0%2.9 $13.21 10/15/20214,470,000 shares $77.11 million -2.6%9.0%2.8 $17.25 9/30/20214,590,000 shares $61.74 million -20.2%9.2%2.9 $13.45 9/15/20215,750,000 shares $77.97 million -0.4%11.5%3.8 $13.56 8/31/20215,770,000 shares $73.97 million +11.0%11.6%3.7 $12.82 8/13/20215,200,000 shares $63.86 million -7.5%10.4%3.2 $12.28Warning: Prepare to Be Shocked by These Payouts (Ad)There's a strategy out there paying up to 70% on tech stocks like Amazon, Tesla, and Microsoft—stocks that don't even pay dividends. It's fast, it's legal, and most people have no clue it exists.Click here to see how much you could be collecting each month → 7/30/20215,620,000 shares $81.83 million -3.8%11.3%3.1 $14.56 7/15/20215,840,000 shares $69.55 million -1.0%11.7%3.2 $11.91 6/30/20215,900,000 shares $76.05 million +35.0%11.8%3.2 $12.89 6/15/20214,370,000 shares $58.65 million -3.7%8.7%2.3 $13.42 5/28/20214,540,000 shares $61.79 million +5.6%9.1%2.5 $13.61 5/14/20214,300,000 shares $64.33 million +21.8%8.6%2.4 $14.96 4/30/20213,530,000 shares $56.52 million -3.3%7.1%2.1 $16.01 4/15/20213,650,000 shares $58.77 million +70.6%7.3%2.5 $16.10 3/31/20212,140,000 shares $37.02 million -26.5%4.3%1.6 $17.30 3/15/20212,910,000 shares $52.35 million -6.1%5.8%2.3 $17.99 2/26/20213,100,000 shares $45.91 million +2.0%6.2%2.7 $14.81 2/12/20213,040,000 shares $44.87 million +4.1%6.1%2.9 $14.76 1/29/20212,920,000 shares $30.05 million +6.2%5.9%2.9 $10.29 1/15/20212,750,000 shares $37.54 million -1.8%5.6%2.9 $13.65 12/31/20202,800,000 shares $30.06 million +8.5%5.7%2.9 $10.74 12/15/20202,580,000 shares $27.66 million +13.2%5.2%2.7 $10.72 11/30/20202,280,000 shares $23.71 million -8.4%4.6%2.1 $10.40 11/15/20202,490,000 shares $22.11 million -1.2%5.0%2.3 $8.88 10/30/20202,520,000 shares $17.67 million -12.2%5.1%2.5 $7.01 10/15/20202,870,000 shares $22.90 million -27.3%5.8%2.4 $7.98 9/30/20203,950,000 shares $28.12 million +20.8%7.9%3.3 $7.12 9/15/20203,270,000 shares $30.51 million +22.5%6.6%2.6 $9.33 8/31/20202,670,000 shares $26.35 million -5.0%5.4%2.3 $9.87 8/14/20202,810,000 shares $27.93 million +1.1%5.6%2.2 $9.94 7/31/20202,780,000 shares $24.21 million -11.8%5.6%2.1 $8.71 7/15/20203,150,000 shares $23.50 million -5.1%6.3%2.5 $7.46 6/30/20203,320,000 shares $23.07 million +7.1%6.7%2.6 $6.95 6/15/20203,100,000 shares $20.74 million +1.6%6.2%2.3 $6.69 5/29/20203,050,000 shares $17.96 million -18.7%6.1%2 $5.89 CENX Short Interest - Frequently Asked Questions What is Century Aluminum's current short interest? Short interest is the volume of Century Aluminum shares that have been sold short but have not yet been closed out or covered. As of April 30th, traders have sold 5,180,000 shares of CENX short. 10.09% of Century Aluminum's shares are currently sold short. Learn More on Century Aluminum's current short interest. What is a good short interest ratio for Century Aluminum? 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. CENX shares currently have a short interest ratio of 3.0. Learn More on Century Aluminum's short interest ratio. Which institutional investors are shorting Century Aluminum? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Century Aluminum: Jane Street Group LLC, Walleye Trading LLC, and Walleye Capital LLC. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission. What is a good short interest percentage for Century Aluminum? 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. 10.09% of Century Aluminum's floating shares are currently sold short. Is Century Aluminum's short interest increasing or decreasing? Century Aluminum saw a decline in short interest in the month of April. As of April 30th, there was short interest totaling 5,180,000 shares, a decline of 11.0% from the previous total of 5,820,000 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 Century Aluminum's float size? Century Aluminum currently has issued a total of 93,303,000 shares. Some of Century Aluminum'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. Century Aluminum currently has a public float of 51,360,000 shares. How does Century Aluminum's short interest compare to its competitors? 10.09% of Century Aluminum's shares are currently sold short. Here is how the short interest of companies in the sector of "industrials" compare to Century Aluminum: Kaiser Aluminum Co. (2.79%), Alcoa Co. (4.73%), Valmont Industries, Inc. (1.54%), MSA Safety Incorporated (2.04%), Zurn Elkay Water Solutions Co. (3.44%), Silgan Holdings Inc. (3.21%), SiteOne Landscape Supply, Inc. (5.51%), Gates Industrial Corp PLC (2.50%), Sealed Air Co. (4.16%), ESCO Technologies Inc. (1.28%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: Spotify Technology S.A. ($4.67 billion), Charter Communications, Inc. ($4.58 billion), Capital One Financial Co. ($4.47 billion), The Kroger Co. ($2.56 billion), Reddit, Inc. ($2.23 billion), Rivian Automotive, Inc. ($2.16 billion), Live Nation Entertainment, Inc. ($1.90 billion), SoFi Technologies, Inc. ($1.85 billion), Zscaler, Inc. ($1.75 billion), and Omnicom Group Inc. ($1.75 billion). View all of the most shorted stocks. What does it mean to sell short Century Aluminum stock? Short selling CENX is an investing strategy that aims to generate trading profit from Century Aluminum as its price is falling. CENX shares are trading down $0.37 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 Century Aluminum? A short squeeze for Century 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 CENX, which in turn drives the price of the stock up even further. How often is Century Aluminum'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 CENX, twice per month. The most recent reporting period available is April, 30 2025. More Short Interest Resources from MarketBeat Related Companies Kaiser Aluminum Short Squeeze Alcoa Short Squeeze Valmont Industries Short Squeeze MSA Safety Short Squeeze Zurn Elkay Water Solutions Short Squeeze Silgan Short Squeeze SiteOne Landscape Supply Short Squeeze Gates Industrial Short Squeeze Sealed Air Short Squeeze ESCO Technologies Short Squeeze Short Interest Tools Stocks to Short Largest Short Interest Positions Short Interest Increases Short Interest Decreases Short Interest Reporting Dates This page (NASDAQ:CENX) was last updated on 5/22/2025 by MarketBeat.com Staff From Our PartnersJuly 2025 Rule Change to Impact Retirement InvestorsThere's a massive change from a new rule going into effect this July. And it's one the Big Banks are alread...Premier Gold Co | SponsoredCollect $7k per month from Tesla’s SECRET dividendTesla doesn't pay a traditional dividend.... 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