Ballard Power Systems (BLDP) Short Interest Ratio & Short Volume $2.99 +0.07 (+2.40%) Closing price 09/24/2025 04:00 PM EasternExtended Trading$3.02 +0.03 (+1.14%) As of 09/24/2025 07:59 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 Polygon.io. Learn more. Add Compare Share Share Short Interest Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsHeadlinesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock Ballard Power Systems Short Interest DataBallard Power Systems (BLDP) has a short interest of 13.46 million shares, representing 5.38% of the float (the number of shares available for trading by the public). This marks a 2.20% increase in short interest from the previous month. The short interest ratio (days to cover) is 2.0, indicating that it would take 2.0 days of the average trading volume of 5.71 million shares to cover all short positions.Current Short Interest13,460,000 sharesPrevious Short Interest13,170,000 sharesChange Vs. Previous Month+2.20%Dollar Volume Sold Short$27.19 millionShort Interest Ratio2.0 Days to CoverLast Record DateAugust 31, 2025Outstanding Shares300,580,000 sharesFloat Size250,270,000 sharesShort Percent of Float5.38%Today's Trading Volume9,457,197 sharesAverage Trading Volume5,706,761 sharesToday's Volume Vs. Average166% Short Selling Ballard Power Systems? Sign up to receive the latest short interest report for Ballard Power Systems and its competitors with MarketBeat's FREE newsletter. 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Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartBLDP Short Interest Over TimeBLDP Days to Cover Over TimeBLDP Percentage of Float Shorted Over Time Ballard Power Systems Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 8/31/202513,460,000 shares $27.19 million +2.2%5.4%2 $2.02 8/15/202513,170,000 shares $26.34 million -11.8%5.3%1.7 $2.00 7/31/202514,930,000 shares $27.32 million +2.2%6.0%1.8 $1.83 7/15/202514,610,000 shares $27.32 million +1.7%5.9%1.7 $1.87 6/30/202514,360,000 shares $22.83 million +4.2%5.8%1.6 $1.59 6/15/202513,780,000 shares $22.60 million -32.7%5.5%1.5 $1.64 5/31/202520,480,000 shares $27.85 million +15.8%8.2%2.4 $1.36 5/15/202517,690,000 shares $24.24 million +3.5%7.0%2 $1.37 4/30/202517,090,000 shares $20.85 million -8.4%7.0%2 $1.22 4/15/202518,660,000 shares $22.21 million +2.3%7.6%2 $1.19 Get the Latest News and Ratings for BLDP and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Ballard Power Systems and its competitors with MarketBeat's FREE daily newsletter. 3/31/202518,240,000 shares $20.06 million +15.2%7.4%1.8 $1.10 3/15/202515,840,000 shares $20.91 million -6.9%6.4%1.6 $1.32 2/28/202517,020,000 shares $20.93 million +10.4%6.9%1.7 $1.23 2/15/202515,420,000 shares $22.67 million -12.6%6.3%1.7 $1.47 1/31/202517,640,000 shares $23.99 million +10.3%7.2%2.1 $1.36 1/15/202516,000,000 shares $26.08 million +4.6%6.5%2.3 $1.63 12/31/202415,300,000 shares $25.40 million +4.9%6.2%2.5 $1.66 12/15/202414,580,000 shares $23.62 million +15.0%5.9%3 $1.62 11/30/202412,680,000 shares $18.89 million -5.4%5.2%3.1 $1.49 11/15/202413,410,000 shares $17.16 million -2.6%5.5%4 $1.28 10/31/202413,770,000 shares $21.76 million -5.1%5.6%4.3 $1.58 10/15/202414,510,000 shares $23.65 million -5.0%5.9%5.2 $1.63 9/30/202415,270,000 shares $27.49 million -20.1%6.2%5.4 $1.80 9/15/202419,110,000 shares $34.40 million +6.3%7.8%7.2 $1.80 8/31/202417,970,000 shares $33.06 million +3.3%7.3%7 $1.84 8/15/202417,390,000 shares $32.17 million -13.9%7.1%6.8 $1.85 7/31/202420,200,000 shares $46.06 million +1.5%8.2%8.1 $2.28 7/15/202419,900,000 shares $50.55 million -11.9%8.2%7.7 $2.54 6/30/202422,590,000 shares $50.83 million +10.3%9.3%9.2 $2.25 6/15/202420,490,000 shares $52.86 million -5.0%8.5%7.3 $2.58 5/31/202421,570,000 shares $66.65 million +1.1%8.9%7.6 $3.09 5/15/202421,340,000 shares $66.79 million -7.6%8.8%7.1 $3.13 4/30/202423,100,000 shares $60.75 million +3.0%9.5%7.8 $2.63 4/15/202422,420,000 shares $62.55 million -2.5%9.3%7.4 $2.79 3/31/202423,000,000 shares $63.94 million -0.8%9.5%7.2 $2.78 3/15/202423,190,000 shares $64.47 million +1.5%9.6%8.3 $2.78 2/29/202422,850,000 shares $71.75 million -2.8%9.5%7.7 $3.14 2/15/202423,500,000 shares $76.61 million +0.6%9.7%8.6 $3.26 1/31/202423,350,000 shares $76.59 million +0.3%9.7%8.7 $3.28 1/15/202423,280,000 shares $80.08 million +4.1%9.6%9.1 $3.44 12/31/202322,370,000 shares $82.77 million +0.3%9.3%9.3 $3.70 12/15/202322,300,000 shares $82.96 million -1.6%9.2%9.3 $3.72 11/30/202322,660,000 shares $79.54 million +0.5%9.4%10.7 $3.51 11/15/202322,550,000 shares $83.21 million -8.2%9.3%10.7 $3.69 10/31/202324,550,000 shares $81.75 million -11.6%10.2%11.4 $3.33 10/15/202327,780,000 shares $101.12 million +2.6%11.5%11.9 $3.64 9/30/202327,080,000 shares $99.38 million +1.4%11.2%10.8 $3.67 9/15/202326,700,000 shares $112.41 million +0.1%11.1%10.3 $4.21 8/31/202326,670,000 shares $112.01 million -3.3%11.0%8.5 $4.20 8/15/202327,570,000 shares $121.31 million -1.2%11.4%8.2 $4.40 7/31/202327,890,000 shares $131.64 million -13.5%11.6%7.9 $4.72 7/15/202332,240,000 shares $146.05 million +0.8%13.4%9.6 $4.53 6/30/202331,970,000 shares $139.39 million +0.2%13.2%10 $4.36 6/15/202331,920,000 shares $147.79 million -6.2%13.2%10.3 $4.63 5/31/202334,040,000 shares $142.29 million +9.2%14.1%12.2 $4.18 5/15/202331,170,000 shares $140.89 million -2.2%12.9%11.5 $4.52 4/30/202331,880,000 shares $140.91 million +1.4%13.4%12.8 $4.42 4/15/202331,430,000 shares $156.21 million -0.4%13.2%12.7 $4.97 3/31/202331,560,000 shares $175.79 million +7.0%13.2%11.8 $5.57 3/15/202329,500,000 shares $148.39 million -1.5%12.4%10.5 $5.03 2/28/202329,960,000 shares $170.47 million +4.8%12.6%10.9 $5.69 2/15/202328,600,000 shares $185.90 million -1.1%12.0%10.3 $6.50 1/31/202328,930,000 shares $188.91 million -9.8%12.1%9.1 $6.53 1/15/202332,070,000 shares $193.38 million -3.0%13.5%9.5 $6.03 12/30/202233,070,000 shares $158.41 million +10.9%13.9%9.6 $4.79 12/15/202229,830,000 shares $171.22 million +5.9%12.5%8.7 $5.74 11/30/202228,180,000 shares $171.90 million +2.5%11.8%8.4 $6.10 11/15/202227,500,000 shares $176.83 million -5.4%11.5%8.2 $6.43 10/31/202229,060,000 shares $164.77 million -1.7%12.2%8.3 $5.67 10/15/202229,550,000 shares $162.23 million +4.2%12.4%8.1 $5.49 9/30/202228,370,000 shares $173.62 million +1.1%11.9%7.8 $6.12 9/15/202228,070,000 shares $208.28 million +2.2%11.8%7.4 $7.42 8/31/202227,460,000 shares $214.19 million +7.2%11.5%6.9 $7.80 8/15/202225,620,000 shares $224.69 million -0.8%10.8%6.1 $8.77 7/31/202225,830,000 shares $207.41 million +8.2%10.8%5.8 $8.03 7/15/202223,880,000 shares $150.92 million -2.1%10.0%5.6 $6.32 6/30/202224,400,000 shares $153.72 million -2.1%10.3%5.9 $6.30 6/15/202224,930,000 shares $155.81 million -12.3%N/A5.8 $6.25 5/31/202228,420,000 shares $206.61 million -0.1%11.9%6.4 $7.27 5/15/202228,440,000 shares $195.38 million +6.6%12.0%5.9 $6.87 4/30/202226,670,000 shares $221.36 million +1.1%11.2%5.8 $8.30 4/15/202226,380,000 shares $267.76 million +5.1%11.1%5.4 $10.15 3/31/202225,110,000 shares $292.28 million -12.9%10.6%4.9 $11.64 3/15/202228,830,000 shares $296.37 million -4.5%12.7%5.7 $10.28 2/28/202230,200,000 shares $344.88 million -5.4%13.3%6.2 $11.42 2/15/202231,930,000 shares $327.92 million +8.6%14.0%7.2 $10.27 1/31/202229,400,000 shares $305.76 million +12.6%12.9%6.5 $10.40 1/15/202226,120,000 shares $286.80 million +8.0%11.5%6.1 $10.98 12/31/202124,180,000 shares $303.70 million -10.0%10.6%5.7 $12.56 12/15/202126,880,000 shares $341.91 million +13.1%11.8%6.7 $12.72 11/30/202123,770,000 shares $360.35 million -3.6%10.4%6.4 $15.16 11/15/202124,650,000 shares $439.02 million +0.0%10.8%6.7 $17.81 10/29/202124,640,000 shares $446.48 million -3.5%10.4%6.7 $18.12 10/15/202125,530,000 shares $402.61 million +4.4%10.8%7.9 $15.77 9/30/202124,460,000 shares $343.66 million +1.7%10.3%8.3 $14.05 9/15/202124,060,000 shares $365.23 million +3.6%10.1%8 $15.18 8/31/202123,220,000 shares $390.10 million +1.6%9.8%7.6 $16.80 8/13/202122,860,000 shares $345.64 million -2.8%9.6%7.1 $15.12 7/30/202123,520,000 shares $380.32 million +2.4%9.9%6.3 $16.17 7/15/202122,980,000 shares $349.53 million +1.5%9.7%5.2 $15.21 6/30/202122,640,000 shares $410.24 million -5.7%9.5%4.7 $18.12 6/15/202124,000,000 shares $410.64 million -1.2%10.1%4.8 $17.11 5/28/202124,290,000 shares $420.70 million +3.5%10.2%4.4 $17.32 5/14/202123,470,000 shares $324.59 million +12.7%9.9%3.8 $13.83 4/30/202120,820,000 shares $460.75 million +13.7%8.8%3.2 $22.13 4/15/202118,320,000 shares $405.42 million +10.0%7.7%3 $22.13 3/31/202116,650,000 shares $379.45 million -6.3%7.0%2.4 $22.79 3/15/202117,770,000 shares $468.42 million +54.4%7.5%2.5 $26.36 2/26/202111,510,000 shares $313.88 million -0.3%4.9%1.7 $27.27 2/12/202111,540,000 shares $423.29 million +4.5%5.2%1.7 $36.68 1/29/202111,040,000 shares $375.36 million -19.2%5.0%1.8 $34.00 1/15/202113,660,000 shares $471.95 million -13.7%6.2%2.3 $34.55 12/31/202015,820,000 shares $372.72 million +12.0%7.1%3.1 $23.56 12/15/202014,130,000 shares $260.56 million -12.5%6.4%3 $18.44 11/30/202016,150,000 shares $331.40 million -18.9%7.6%3.7 $20.52 11/15/202019,920,000 shares $322.31 million +24.2%10.1%4.6 $16.18 10/30/202016,040,000 shares $237.07 million -7.8%8.7%3.9 $14.78 10/15/202017,390,000 shares $327.98 million +9.2%9.4%4.1 $18.86 9/30/202015,930,000 shares $240.54 million +11.8%8.6%3.5 $15.10 BLDP Short Interest - Frequently Asked Questions What is Ballard Power Systems' current short interest? Short interest is the volume of Ballard Power Systems shares that have been sold short but have not yet been closed out or covered. As of August 31st, investors have sold 13,460,000 shares of BLDP short. 5.38% of Ballard Power Systems' shares are currently sold short. Learn More on Ballard Power Systems' current short interest. What is a good short interest ratio for Ballard Power Systems? 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. BLDP shares currently have a short interest ratio of 2.0. Learn More on Ballard Power Systems's short interest ratio. Which institutional investors are shorting Ballard Power Systems? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Ballard Power Systems: Group One Trading LLC, Walleye Trading LLC, and Simplex Trading LLC. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission. What is a good short interest percentage for Ballard Power Systems? 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. 5.38% of Ballard Power Systems' floating shares are currently sold short. Is Ballard Power Systems' short interest increasing or decreasing? Ballard Power Systems saw a increase in short interest in the month of August. As of August 31st, there was short interest totaling 13,460,000 shares, an increase of 2.2% from the previous total of 13,170,000 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 Ballard Power Systems' float size? Ballard Power Systems currently has issued a total of 300,580,000 shares. Some of Ballard Power Systems' 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. Ballard Power Systems currently has a public float of 250,270,000 shares. How does Ballard Power Systems' short interest compare to its competitors? 5.38% of Ballard Power Systems' shares are currently sold short. Here is how the short interest of companies compare to Ballard Power Systems: Blink Charging Co. (18.37%), FuelCell Energy, Inc. (12.37%), Plug Power, Inc. (30.66%), Sunrun Inc. (25.85%), ChargePoint Holdings, Inc. (17.20%), Eos Energy Enterprises, Inc. (32.42%), Atkore Inc. (4.81%), Energizer Holdings, Inc. (8.67%), Enovix Corporation (27.98%), Fluence Energy, Inc. (9.16%), 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 ($73.23 billion), Invesco QQQ ($29.52 billion), iShares Russell 2000 ETF ($20.82 billion), iShares 20+ Year Treasury Bond ETF ($10.76 billion), Palo Alto Networks, Inc. ($9.37 billion), Strategy Inc ($7.58 billion), Invesco S&P 500 Equal Weight ETF ($6.78 billion), SPDR S&P Biotech ETF ($6.72 billion), AppLovin Corporation ($6.37 billion), and iShares iBoxx $ Investment Grade Corporate Bond ETF ($6.29 billion). View all of the most shorted stocks. What does it mean to sell short Ballard Power Systems stock? Short selling BLDP is an investing strategy that aims to generate trading profit from Ballard Power Systems as its price is falling. BLDP shares are trading up $0.07 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 Ballard Power Systems? A short squeeze for Ballard Power Systems 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 BLDP, which in turn drives the price of the stock up even further. How often is Ballard Power Systems' 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 BLDP, twice per month. The most recent reporting period available is August, 31 2025. More Short Interest Resources from MarketBeat Related Companies Blink Charging Short Interest Data FuelCell Energy Short Interest Data Plug Power Short Interest Data Sunrun Short Interest Data ChargePoint Short Interest Data Eos Energy Enterprises Short Interest Data Atkore Short Interest Data Energizer Short Interest Data Enovix Short Interest Data Fluence Energy Short Interest Data Short Interest Tools Stocks to Short Largest Short Interest Positions Short Interest Increases Short Interest Decreases Short Interest Reporting Dates This page (NASDAQ:BLDP) was last updated on 9/25/2025 by MarketBeat.com Staff From Our PartnersTrump’s national nightmare is herePorter Stansberry and Jeff Brown say a new U.S. national emergency is already underway — and it could trigger ...Porter & Company | SponsoredHe Called Nvidia at $1.10. Now, He Says THIS Stock Will…The original Magnificent Seven returned 16,894%—turning $7K into $1.18 million. 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