National Grid Transco (NGG) Short Interest Ratio & Short Volume $71.67 +1.06 (+1.49%) As of 07/3/2025 03:44 PM Eastern This is a fair market value price provided by Polygon.io. Learn more. Add Compare Share Share Short Interest Stock AnalysisAnalyst ForecastsChartCompetitorsDividendFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock National Grid Transco Short Interest DataNational Grid Transco (NGG) has a short interest of 1.58 million shares, representing 0.16% of the float (the number of shares available for trading by the public). This marks a -32.77% decrease in short interest from the previous month. The short interest ratio (days to cover) is 1.5, indicating that it would take 1.5 days of the average trading volume of 763,153 shares to cover all short positions.Current Short Interest1,580,000 sharesPrevious Short Interest2,350,000 sharesChange Vs. Previous Month-32.77%Dollar Volume Sold Short$114.77 millionShort Interest Ratio1.5 Days to CoverLast Record DateJune 15, 2025Outstanding Shares978,450,000 sharesShort Percent of Float0.16%Today's Trading Volume808,722 sharesAverage Trading Volume763,153 sharesToday's Volume Vs. Average106% Short Selling National Grid Transco? Sign up to receive the latest short interest report for National Grid Transco and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartNGG Short Interest Over TimeNGG Days to Cover Over TimeNGG Percentage of Float Shorted Over Time National Grid Transco Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 6/15/20251,580,000 shares $114.77 million -32.8%0.2%1.5 $72.64 5/31/20252,350,000 shares $167.79 million +16.9%0.2%2.4 $71.40 5/15/20252,010,000 shares $140.88 million -13.0%0.2%2.2 $70.09 4/30/20252,310,000 shares $168.63 million +27.6%N/A3 $73.00 4/15/20251,810,000 shares $128.65 million +64.6%0.2%2.4 $71.08 3/31/20251,100,000 shares $72.23 million +6.8%0.1%1.5 $65.66 3/15/20251,030,000 shares $65.15 million -29.5%0.1%1.5 $63.25 2/28/20251,460,000 shares $90.65 million -1.4%0.1%2.1 $62.09 2/15/20251,480,000 shares $89.88 million +14.7%0.2%2.1 $60.73 1/31/20251,290,000 shares $79.15 million +183.8%N/A1.8 $61.35 Get the Latest News and Ratings for NGG and Related StocksEnter your email address below to receive the latest news and analysts' ratings for National Grid Transco and its competitors with MarketBeat's FREE daily newsletter. 1/15/2025454,500 shares $26.20 million +37.1%N/A0.7 $57.64 12/31/2024331,500 shares $19.70 million -66.7%N/A0.6 $59.42 12/15/2024995,700 shares $59.37 million -1.4%N/A1.9 $59.63 11/30/20241,010,000 shares $64.32 million +63.5%N/A2 $63.68 11/15/2024617,900 shares $38.78 million +16.5%N/A1.3 $62.76 10/31/2024530,200 shares $33.74 million -36.8%N/A1.3 $63.63 10/15/2024839,100 shares $56.35 million -6.7%N/A1.7 $67.16 9/30/2024899,700 shares $62.68 million -25.6%N/A1.6 $69.67 9/15/20241,210,000 shares $84.22 million +4.3%N/A1.9 $69.60 8/31/20241,160,000 shares $77.26 million -0.9%N/A1.6 $66.60 8/15/20241,170,000 shares $75.28 million +7.3%N/A1.4 $64.34 7/31/20241,090,000 shares $70.25 million +0.9%N/A1.3 $64.45 7/15/20241,080,000 shares $65.66 million +25.9%N/A1.5 $60.80 6/30/2024858,000 shares $48.73 million +2.4%N/A1.3 $56.80 6/15/2024838,300 shares $47.41 million -72.3%N/A1.5 $56.55 5/31/20243,030,000 shares $175.29 million +1.0%N/A7 $57.85 5/15/20243,000,000 shares $218.40 million +10.3%N/A9.1 $72.80 4/30/20242,720,000 shares $181.26 million +2.6%N/A8.2 $66.64 4/15/20242,650,000 shares $170.95 million -4.7%N/A6.4 $64.51 3/31/20242,780,000 shares $189.65 million -0.4%N/A6.8 $68.22 3/15/20242,790,000 shares $189.41 million -11.2%N/A6.8 $67.89 2/29/20243,140,000 shares $209.31 million -14.0%N/A7.1 $66.66 2/15/20243,650,000 shares $236.48 million -11.2%N/A7.9 $64.79 1/31/20244,110,000 shares $277.55 million +37.9%N/A8.3 $67.53 1/15/20242,980,000 shares $204.67 million +21.6%N/A6.5 $68.68 12/31/20232,450,000 shares $166.58 million -5.8%N/A5.6 $67.99 12/15/20232,600,000 shares $176.31 million +11.1%N/A5.8 $67.81 11/30/20232,340,000 shares $154.46 million +30.0%N/A5.5 $66.01 11/15/20231,800,000 shares $111.56 million +0.6%N/A4.5 $61.98 10/31/20231,790,000 shares $107.67 million -13.9%N/A5.1 $60.15Elon’s BIGGEST warning yet? (Ad)Tesla's About to Prove Everyone Wrong... Again Back in 2018, when Jeff Brown told everyone to buy Tesla… The "experts" said Elon was finished and Tesla was headed for bankruptcy. Now they're saying the same thing, but Jeff has uncovered Tesla's next breakthrough. Click here to see why Tesla's about to prove everyone wrong... again. 10/15/20232,080,000 shares $125.44 million +8.3%N/A6.1 $60.31 9/30/20231,920,000 shares $116.41 million +5.5%N/A5.8 $60.63 9/15/20231,820,000 shares $116.90 million -1.1%N/A6 $64.23 8/31/20231,840,000 shares $116.31 million -9.8%N/A5.9 $63.21 8/15/20232,040,000 shares $125.93 million -7.3%N/A6.2 $61.73 7/31/20232,200,000 shares $148.24 million +10.6%N/A5.8 $67.38 7/15/20231,990,000 shares $135.18 million +15.7%N/A5.5 $67.93 6/30/20231,720,000 shares $115.81 million +19.4%N/A4.8 $67.33 6/15/20231,440,000 shares $96.84 million +14.3%N/A3.9 $67.25 5/31/20231,260,000 shares $87.33 million +1.6%N/A3.3 $69.31 5/15/20231,240,000 shares $91.20 million +64.4%N/A3.5 $73.55 4/30/2023754,400 shares $54.05 million -10.6%N/A2.5 $71.65 4/15/2023843,800 shares $58.74 million +7.4%N/A2.8 $69.61 3/31/2023785,500 shares $53.41 million -10.3%N/A2.6 $67.99 3/15/2023876,100 shares $55.70 million +30.7%N/A2.8 $63.58 2/28/2023670,500 shares $42.18 million +13.4%N/A2.2 $62.91 2/15/2023591,200 shares $37.62 million +3.3%N/A1.8 $63.64 1/31/2023572,400 shares $36.50 million +3.2%N/A1.6 $63.77 1/15/2023554,700 shares $35.03 million +2.5%N/A1.4 $63.15 12/30/2022541,200 shares $32.65 million -15.0%N/A1.1 $60.32 12/15/2022636,800 shares $39.60 million -14.3%N/A1.2 $62.19 11/30/2022743,100 shares $45.77 million +17.1%N/A1.3 $61.60 11/15/2022634,600 shares $37.63 million +13.2%N/A1.1 $59.30 10/31/2022560,700 shares $30.63 million +56.9%N/A1 $54.62 10/15/2022357,300 shares $17.38 million -53.7%N/A0.7 $48.65 9/30/2022771,100 shares $39.73 million -18.7%N/A1.7 $51.53 9/15/2022948,400 shares $56.74 million -7.0%N/A2.4 $59.83 8/31/20221,020,000 shares $64.45 million +35.5%N/A2.5 $63.19 8/15/2022753,000 shares $53.21 million +13.9%N/A1.9 $70.67 7/31/2022660,900 shares $46.01 million +18.7%N/A1.6 $69.61 7/15/2022556,600 shares $36.90 million -13.8%N/A1.3 $66.29 6/30/2022646,000 shares $41.79 million -22.3%N/A1.5 $64.69 6/15/2022831,100 shares $53.86 million -15.5%N/A2 $64.81 5/31/2022983,700 shares $73.17 million +27.8%N/A2.5 $74.38 5/15/2022769,900 shares $57.75 million -3.5%N/A1.9 $75.01 4/30/2022797,400 shares $59.14 million -13.8%N/A2 $74.16 4/15/2022925,000 shares $71.68 million +38.1%N/A2.3 $77.49 3/31/2022669,700 shares $51.48 million -18.1%N/A1.6 $76.87 3/15/2022817,700 shares $61.82 million -5.7%N/A2 $75.60 2/28/2022866,700 shares $65.51 million +11.4%N/A2.2 $75.58 2/15/2022777,900 shares $56.39 million +28.8%N/A2.1 $72.49 1/31/2022603,800 shares $44.19 million -22.8%N/A1.8 $73.19 1/15/2022781,700 shares $57.57 million -17.4%N/A2.4 $73.65 12/31/2021946,000 shares $68.41 million +27.7%N/A3.3 $72.32 12/15/2021740,900 shares $52.04 million +6.9%N/A2.4 $70.24 11/30/2021693,200 shares $45.80 million +63.0%N/A2.3 $66.07 11/15/2021425,400 shares $28.04 million -20.2%N/A1.4 $65.92 10/29/2021533,200 shares $34.17 million +7.6%N/A1.8 $64.08 10/15/2021495,500 shares $30.53 million +72.9%N/A1.8 $61.61 9/30/2021286,600 shares $17.09 million -32.8%N/A1 $59.63Elon’s BIGGEST warning yet? (Ad)Tesla's About to Prove Everyone Wrong... Again Back in 2018, when Jeff Brown told everyone to buy Tesla… The "experts" said Elon was finished and Tesla was headed for bankruptcy. Now they're saying the same thing, but Jeff has uncovered Tesla's next breakthrough. Click here to see why Tesla's about to prove everyone wrong... again. 9/15/2021426,700 shares $28.33 million +35.9%N/A1.5 $66.39 8/31/2021314,100 shares $20.38 million +16.6%N/A1.1 $64.89 8/13/2021269,400 shares $17.88 million -7.1%N/A0.9 $66.37 7/30/2021289,900 shares $18.65 million -12.2%0.0%0.9 $64.32 7/15/2021330,300 shares $21.46 million -0.4%0.1%1 $64.96 6/30/2021331,700 shares $21.21 million -11.7%0.1%1.1 $63.94 6/15/2021375,800 shares $24.71 million -25.1%0.1%1.1 $65.76 5/28/2021501,600 shares $33.54 million +23.9%0.1%1.4 $66.87 5/14/2021405,000 shares $26.29 million +7.0%N/A1.1 $64.92 4/30/2021378,400 shares $23.53 million +25.1%N/A1 $62.18 4/15/2021302,600 shares $18.52 million -2.0%N/A0.8 $61.21 3/31/2021308,900 shares $18.23 million -22.9%N/A0.8 $59.01 3/15/2021400,600 shares $23.60 million +3.7%N/A1.2 $58.92 2/26/2021386,300 shares $22.34 million +61.8%N/A1.1 $57.83 2/12/2021238,700 shares $14.11 million -19.9%N/A0.7 $59.13 1/29/2021297,900 shares $17.60 million -1.0%N/A0.9 $59.08 1/15/2021301,000 shares $17.97 million -13.8%N/A0.9 $59.70 12/31/2020349,300 shares $20.59 million -6.5%N/A1 $58.96 12/15/2020373,400 shares $21.76 million -66.4%N/A1 $58.28 11/30/20201,110,000 shares $64.94 million +126.1%N/A2.9 $58.50 11/15/2020490,900 shares $30.90 million -30.4%N/A1.4 $62.94 10/30/2020705,100 shares $42.28 million -12.6%N/A2.1 $59.96 10/15/2020807,100 shares $49.43 million +21.1%N/A2.4 $61.25 9/30/2020666,500 shares $38.52 million +23.6%N/A1.8 $57.79 9/15/2020539,200 shares $29.44 million -50.1%N/A1.3 $54.60 8/31/20201,080,000 shares $61.00 million +16.5%N/A2.3 $56.48 8/14/2020927,400 shares $54.11 million -5.8%N/A1.9 $58.35 7/31/2020984,700 shares $58.21 million +29.5%N/A1.9 $59.11 7/15/2020760,400 shares $42.08 million -28.9%N/A1.4 $55.34 NGG Short Interest - Frequently Asked Questions What is National Grid Transco's current short interest? Short interest is the volume of National Grid Transco shares that have been sold short but have not yet been closed out or covered. As of June 15th, traders have sold 1,580,000 shares of NGG short. 0.16% of National Grid Transco's shares are currently sold short. Learn More on National Grid Transco's current short interest. What is a good short interest ratio for National Grid Transco? 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. NGG shares currently have a short interest ratio of 2.0. Learn More on National Grid Transco's short interest ratio. Which institutional investors are shorting National Grid Transco? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of National Grid Transco: Twin Tree Management LP, 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 National Grid Transco? 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. 0.16% of National Grid Transco's floating shares are currently sold short. Is National Grid Transco's short interest increasing or decreasing? National Grid Transco saw a decrease in short interest in June. As of June 15th, there was short interest totaling 1,580,000 shares, a decrease of 32.8% from the previous total of 2,350,000 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. How does National Grid Transco's short interest compare to its competitors? 0.16% of National Grid Transco's shares are currently sold short. Here is how the short interest of companies in the industry of "utilities" compare to National Grid Transco: Constellation Energy Corporation (2.38%), Enterprise Products Partners L.P. (1.81%), Vistra Corp. (1.96%), Energy Transfer LP (0.83%), American Electric Power Company, Inc. (3.93%), TC Energy Corporation (2.00%), Exelon Corporation (1.83%), Xcel Energy Inc. (1.47%), Cheniere Energy Partners, L.P. (0.37%), Fortis (1.74%), 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 ($69.26 billion), Invesco QQQ ($25.22 billion), iShares Russell 2000 ETF ($20.33 billion), iShares 20+ Year Treasury Bond ETF ($9.99 billion), MicroStrategy Incorporated ($9.12 billion), Canadian Natural Resources Limited ($6.73 billion), SPDR S&P Biotech ETF ($6.52 billion), Invesco S&P 500 Equal Weight ETF ($5.60 billion), Financial Select Sector SPDR Fund ($4.64 billion), and iShares iBoxx $ Investment Grade Corporate Bond ETF ($4.59 billion). View all of the most shorted stocks. What does it mean to sell short National Grid Transco stock? Short selling NGG is an investing strategy that aims to generate trading profit from National Grid Transco as its price is falling. NGG shares are trading up $1.06 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 National Grid Transco? A short squeeze for National Grid Transco 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 NGG, which in turn drives the price of the stock up even further. How often is National Grid Transco'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 NGG, twice per month. The most recent reporting period available is June, 15 2025. More Short Interest Resources from MarketBeat Related Companies Constellation Energy Short Interest Enterprise Products Partners Short Interest Vistra Short Interest Energy Transfer Short Interest American Electric Power Short Interest TC Energy Short Interest Exelon Short Interest Xcel Energy Short Interest Cheniere Energy Partners Short Interest Fortis Short Interest Short Interest Tools Stocks to Short Largest Short Interest Positions Short Interest Increases Short Interest Decreases Short Interest Reporting Dates This page (NYSE:NGG) was last updated on 7/5/2025 by MarketBeat.com Staff From Our PartnersTrump’s New Order Could Boost Social Security Benefits by 400%If you collect—or plan to collect—Social Security, you need to see this. 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