Altair Engineering (ALTR) Short Interest Ratio & Short Volume $111.85 0.00 (0.00%) As of 03/26/2025 Add Compare Share Share Short Interest Stock AnalysisAnalyst ForecastsChartEarningsFinancialsHeadlinesInsider TradesOwnershipSEC FilingsShort InterestSustainabilityTrendsBuy This Stock Altair Engineering Short Interest DataAltair Engineering (ALTR) has a short interest of 5.65 million shares, representing 8.49% of the float (the number of shares available for trading by the public). This marks a 14.84% increase in short interest from the previous month. The short interest ratio (days to cover) is 6.9, indicating that it would take 6.9 days of the average trading volume of 767,758 shares to cover all short positions.Current Short Interest5,650,000 sharesPrevious Short Interest4,920,000 sharesChange Vs. Previous Month+14.84%Dollar Volume Sold Short$629.13 millionShort Interest Ratio6.9 Days to CoverLast Record DateMarch 15, 2025Outstanding Shares85,795,000 sharesShort Percent of Float8.49%Today's Trading Volume0 sharesAverage Trading Volume767,758 sharesToday's Volume Vs. Average0% Short Selling Altair Engineering? Sign up to receive the latest short interest report for Altair Engineering and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartALTR Short Interest Over TimeALTR Days to Cover Over TimeALTR Percentage of Float Shorted Over Time Altair Engineering Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 3/15/20255,650,000 shares $629.13 million +14.8%8.5%6.9 $111.35 2/28/20254,920,000 shares $549.07 million -3.7%7.4%6.3 $111.60 2/15/20255,110,000 shares $566.44 million +25.9%7.7%6.7 $110.85 1/31/20254,060,000 shares $448.02 million +4.1%N/A4.5 $110.35 1/15/20253,900,000 shares $429.90 million +2.6%N/A3.5 $110.23 12/31/20243,800,000 shares $414.62 million +13.4%N/A3.7 $109.11 12/15/20243,350,000 shares $357.28 million +0.9%N/A3.5 $106.65 11/30/20243,320,000 shares $350.63 million +5.4%N/A3.8 $105.61 11/15/20243,150,000 shares $326.81 million -29.7%N/A3.8 $103.75 10/31/20244,480,000 shares $465.88 million -1.5%N/A6.1 $103.99 Get the Latest News and Ratings for ALTR and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Altair Engineering and its competitors with MarketBeat's FREE daily newsletter. 10/15/20244,550,000 shares $428.70 million -7.3%N/A11.1 $94.22 9/30/20244,910,000 shares $468.95 million +1.7%N/A12.6 $95.51 9/15/20244,830,000 shares $425.14 million +3.4%N/A8.7 $88.02 8/31/20244,670,000 shares $421.98 million +6.6%N/A7.4 $90.36 8/15/20244,380,000 shares $400.11 million +4.5%N/A7 $91.35 7/31/20244,190,000 shares $370.23 million -6.1%N/A6.8 $88.36 7/15/20244,460,000 shares $432.49 million +2.1%N/A7.4 $96.97 6/30/20244,370,000 shares $428.61 million +28.2%N/A7.5 $98.08 6/15/20243,410,000 shares $329.44 million -0.3%N/A6.1 $96.61 5/31/20243,420,000 shares $298.67 million -1.7%N/A9 $87.33 5/15/20243,480,000 shares $316.19 million +0.3%N/A8.9 $90.86 4/30/20243,470,000 shares $279.16 million +3.0%N/A8.4 $80.45 4/15/20243,370,000 shares $273.04 million -1.8%N/A8.5 $81.02 3/31/20243,430,000 shares $295.49 million +0.6%N/A8.3 $86.15 3/15/20243,410,000 shares $269.49 million +2.7%N/A7.8 $79.03 2/29/20243,320,000 shares $282.47 million -4.9%N/A7.7 $85.08 2/15/20243,490,000 shares $319.96 million +0.6%N/A8.4 $91.68 1/31/20243,470,000 shares $295.02 million +8.1%N/A9.1 $85.02 1/15/20243,210,000 shares $270.38 million +7.4%N/A8.5 $84.23 12/31/20232,990,000 shares $251.61 million +3.8%N/A8.2 $84.15 12/15/20232,880,000 shares $213.64 million -4.0%N/A8.3 $74.18 11/30/20233,000,000 shares $217.38 million -1.0%N/A9.9 $72.46 11/15/20233,030,000 shares $224.10 million +13.5%N/A10.4 $73.96 10/31/20232,670,000 shares $165.86 million -2.6%N/A9.6 $62.12 10/15/20232,740,000 shares $179.66 million +13.2%N/A10.6 $65.57 9/30/20232,420,000 shares $151.40 million +4.3%N/A9.8 $62.56 9/15/20232,320,000 shares $151.77 million -16.9%N/A10.2 $65.42 8/31/20232,790,000 shares $185.48 million +0.7%N/A10.8 $66.48 8/15/20232,770,000 shares $173.40 million +1.5%N/A9.6 $62.60 7/31/20232,730,000 shares $204.59 million -0.7%N/A9.6 $74.94The Robotics Revolution has arrived … and one $7 stock could take off as a result. 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However, it's impact on the US economy and society will be FAR greater than anything we ever imagined.This little-known company holds nearly 100 patents and trades for around $7 7/15/20232,750,000 shares $206.17 million -4.8%N/A9.5 $74.97 6/30/20232,890,000 shares $219.18 million -3.3%N/A9.9 $75.84 6/15/20232,990,000 shares $228.44 million +0.3%N/A9.9 $76.40 5/31/20232,980,000 shares $218.52 million -2.0%N/A9.5 $73.33 5/15/20233,040,000 shares $206.96 million -1.3%N/A9.2 $68.08 4/30/20233,080,000 shares $212.67 million -1.0%N/A9.4 $69.05 4/15/20233,110,000 shares $221.31 million +2.0%N/A9.4 $71.16 3/31/20233,050,000 shares $219.94 million +3.7%N/A9.3 $72.11 3/15/20232,940,000 shares $196.98 million +14.4%N/A9.4 $67.00 2/28/20232,570,000 shares $164.63 million +6.2%N/A8.7 $64.06 2/15/20232,420,000 shares $140.80 million +6.6%N/A8.1 $58.18 1/31/20232,270,000 shares $120.54 million +8.1%N/A7.3 $53.10 1/15/20232,100,000 shares $104.54 million -3.7%N/A6.7 $49.78 12/30/20222,180,000 shares $99.12 million +6.3%N/A6.1 $45.47 12/15/20222,050,000 shares $94.12 million -1.9%N/A5.7 $45.91 11/30/20222,090,000 shares $102.56 million -14.0%N/A6 $49.07 11/15/20222,430,000 shares $121.67 million -5.1%N/A7.2 $50.07 10/31/20222,560,000 shares $125.57 million -0.4%N/A8.7 $49.05 10/15/20222,570,000 shares $112.90 million +1.6%N/A8.8 $43.93 9/30/20222,530,000 shares $111.88 million -3.4%N/A8.6 $44.22 9/15/20222,620,000 shares $125.37 million -6.8%N/A9.5 $47.85 8/31/20222,810,000 shares $146.15 million -0.4%N/A8.7 $52.01 8/15/20222,820,000 shares $161.53 million +2.6%N/A8.4 $57.28 7/31/20222,750,000 shares $162.00 million +0.7%N/A7.3 $58.91 7/15/20222,730,000 shares $140.21 million +3.4%N/A7.2 $51.36 6/30/20222,640,000 shares $138.60 million -2.6%N/A7.3 $52.50 6/15/20222,710,000 shares $139.19 million +3.0%N/A8.3 $51.36 5/31/20222,630,000 shares $144.54 million -10.2%N/A9.9 $54.96 5/15/20222,930,000 shares $155.50 million +9.7%N/A10.8 $53.07 4/30/20222,670,000 shares $145.03 million -1.5%N/A11.4 $54.32 4/15/20222,710,000 shares $156.64 million -1.5%N/A13.4 $57.80 3/31/20222,750,000 shares $177.10 million -6.1%N/A12.8 $64.40 3/15/20222,930,000 shares $174.39 million +5.0%N/A13 $59.52 2/28/20222,790,000 shares $185.31 million +6.9%N/A12.5 $66.42 2/15/20222,610,000 shares $161.27 million +6.1%N/A12.3 $61.79 1/31/20222,460,000 shares $154.78 million -6.8%N/A11.3 $62.92 1/15/20222,640,000 shares $169.49 million No ChangeN/A12.4 $64.20 12/31/20212,640,000 shares $204.12 million -0.4%N/A13.5 $77.32 12/15/20212,650,000 shares $192.58 million -0.4%N/A13 $72.67 11/30/20212,660,000 shares $198.04 million -21.8%N/A12.6 $74.45 11/15/20213,400,000 shares $265.81 million -6.6%N/A16.2 $78.18 10/29/20213,640,000 shares $283.16 million No ChangeN/A18.2 $77.79 10/15/20213,640,000 shares $264.81 million -24.0%N/A18 $72.75 9/30/20214,790,000 shares $330.22 million -9.6%N/A22.4 $68.94 9/15/20215,300,000 shares $401.05 million -3.3%11.6%24.9 $75.67 8/31/20215,480,000 shares $405.47 million +2.2%12.0%26 $73.99 8/13/20215,360,000 shares $386.51 million +15.8%11.7%23.6 $72.11 7/30/20214,630,000 shares $322.99 million -6.8%10.3%19 $69.76 7/15/20214,970,000 shares $329.51 million +2.9%11.1%18.9 $66.30 6/30/20214,830,000 shares $333.13 million -2.4%10.8%18.4 $68.97“Biggest Social Security Change Ever” (Ad)The Financial Times called this new Trump initiative "a big pot of money for the American people." And The Motley Fool said that it could "pave the way for the biggest Social Security change ever."Click here to see the details because this is also creating an EVEN BIGGER opportunity in the stock 6/15/20214,950,000 shares $319.77 million -1.6%11.0%18.6 $64.60 5/28/20215,030,000 shares $338.87 million -0.2%11.2%18 $67.37 5/14/20215,040,000 shares $319.94 million +4.4%N/A16.2 $63.48 4/30/20214,830,000 shares $324.82 million +0.6%N/A15.4 $67.25 4/15/20214,800,000 shares $307.15 million +2.1%N/A16 $63.99 3/31/20214,700,000 shares $286.56 million -1.3%N/A15.2 $60.97 3/15/20214,760,000 shares $288.60 million -0.4%N/A15.5 $60.63 2/26/20214,780,000 shares $275.66 million +1.9%N/A16 $57.67 2/12/20214,690,000 shares $311.18 million +2.2%N/A16.8 $66.35 1/29/20214,590,000 shares $261.40 million -0.4%N/A15.6 $56.95 1/15/20214,610,000 shares $284.58 million +0.4%N/A17 $61.73 12/31/20204,590,000 shares $267.05 million +6.7%N/A17.9 $58.18 12/15/20204,300,000 shares $244.58 million +0.2%N/A16.3 $56.88 11/30/20204,290,000 shares $228.14 million -1.8%N/A16.4 $53.18 11/15/20204,370,000 shares $214.17 million +0.5%N/A17.9 $49.01 10/30/20204,350,000 shares $196.10 million -1.6%N/A18.9 $45.08 10/15/20204,420,000 shares $204.47 million -0.7%N/A19.1 $46.26 9/30/20204,450,000 shares $186.81 million +0.9%N/A19.1 $41.98 9/15/20204,410,000 shares $175.08 million -5.0%N/A18.7 $39.70 8/31/20204,640,000 shares $194.97 million -6.1%N/A19.2 $42.02 8/14/20204,940,000 shares $197.55 million -2.0%N/A19 $39.99 7/31/20205,040,000 shares $203.11 million -2.1%N/A18.7 $40.30 7/15/20205,150,000 shares $193.07 million -3.6%N/A19.8 $37.49 6/30/20205,340,000 shares $207.14 million +3.3%N/A20 $38.79 6/15/20205,170,000 shares $191.39 million -2.6%N/A17.3 $37.02 ALTR Short Interest - Frequently Asked Questions What is Altair Engineering's current short interest? Short interest is the volume of Altair Engineering shares that have been sold short but have not yet been covered or closed out. As of March 15th, traders have sold 5,650,000 shares of ALTR short. 8.49% of Altair Engineering's shares are currently sold short. Learn More on Altair Engineering's current short interest. What is a good short interest ratio for Altair Engineering? 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. ALTR shares currently have a short interest ratio of 7.0. Learn More on Altair Engineering's short interest ratio. Which institutional investors are shorting Altair Engineering? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Altair Engineering: Parallax Volatility Advisers L.P., Twin Tree Management LP, Walleye Trading LLC, Walleye Capital 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 Altair Engineering? 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. 8.49% of Altair Engineering's floating shares are currently sold short. Is Altair Engineering's short interest increasing or decreasing? Altair Engineering saw a increase in short interest in the month of March. As of March 15th, there was short interest totaling 5,650,000 shares, an increase of 14.8% from the previous total of 4,920,000 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 Altair Engineering's short interest compare to its competitors? 8.49% of Altair Engineering's shares are currently sold short. Here is how the short interest of companies compare to Altair Engineering: Microchip Technology Incorporated (5.80%), Monolithic Power Systems, Inc. (5.22%), First Solar, Inc. (11.67%), Skyworks Solutions, Inc. (11.16%), MACOM Technology Solutions Holdings, Inc. (3.39%), Lattice Semiconductor Co. (8.16%), Rambus Inc. (3.57%), Cirrus Logic, Inc. (2.61%), Silicon Laboratories Inc. (5.70%), Semtech Co. (9.70%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: Invesco QQQ ($26.28 billion), iShares 20+ Year Treasury Bond ETF ($9.53 billion), Strategy Incorporated ($8.50 billion), Apollo Global Management, Inc. ($4.86 billion), Super Micro Computer, Inc. ($4.85 billion), Charter Communications, Inc. ($4.28 billion), Capital One Financial Co. ($4.08 billion), AppLovin Co. ($3.82 billion), Canadian Natural Resources Limited ($3.78 billion), and Schlumberger Limited ($2.87 billion). View all of the most shorted stocks. What does it mean to sell short Altair Engineering stock? Short selling ALTR is an investing strategy that aims to generate trading profit from Altair Engineering as its price is falling. 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 Altair Engineering? A short squeeze for Altair Engineering 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 ALTR, which in turn drives the price of the stock up even further. How often is Altair Engineering'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 ALTR, twice per month. The most recent reporting period available is March, 15 2025. More Short Interest Resources from MarketBeat Related Companies Microchip Technology Short Interest Data Monolithic Power Systems Short Interest Data First Solar Short Interest Data Skyworks Solutions Short Interest Data MACOM Technology Solutions Short Interest Data Lattice Semiconductor Short Interest Data Rambus Short Interest Data Cirrus Logic Short Interest Data Silicon Laboratories Short Interest Data Semtech 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:ALTR) was last updated on 6/10/2025 by MarketBeat.com Staff From Our PartnersBanks aren’t ready for this altcoin—are you?While everyone's distracted by Bitcoin's moves, a stealth revolution is underway. 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