Onto Innovation (ONTO) Short Interest Ratio & Short Volume $137.88 -3.04 (-2.16%) As of 09:30 AM Eastern This is a fair market value price provided by Polygon.io. Learn more. Add Compare Share Share Short Interest Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock Onto Innovation Short Interest DataOnto Innovation (ONTO) has a short interest of 1.51 million shares, representing 3.09% of the float (the number of shares available for trading by the public). This marks a 23.77% increase in short interest from the previous month. The short interest ratio (days to cover) is 1.6, indicating that it would take 1.6 days of the average trading volume of 696,982 shares to cover all short positions.Current Short Interest1,510,000 sharesPrevious Short Interest1,220,000 sharesChange Vs. Previous Month+23.77%Dollar Volume Sold Short$219.86 millionShort Interest Ratio1.6 Days to CoverLast Record DateFebruary 28, 2025Outstanding Shares49,270,000 sharesFloat Size48,880,000 sharesShort Percent of Float3.09%Today's Trading Volume603,362 sharesAverage Trading Volume696,982 sharesToday's Volume Vs. Average87% Short Selling Onto Innovation? Sign up to receive the latest short interest report for Onto Innovation and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartONTO Short Interest Over TimeONTO Days to Cover Over TimeONTO Percentage of Float Shorted Over Time Remove Ads Onto Innovation Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 2/28/20251,510,000 shares $219.86 million +23.8%3.1%1.6 $145.60 2/15/20251,220,000 shares $215.55 million -14.1%2.5%1.4 $176.68 1/31/20251,420,000 shares $291.20 million +18.3%2.9%1.7 $205.07 1/15/20251,200,000 shares $246.43 million +3.5%N/A1.5 $205.36 12/31/20241,160,000 shares $193.34 million +30.5%2.4%1.5 $166.67 12/15/2024889,000 shares $148.54 million -7.8%1.8%1.2 $167.09 11/30/2024964,300 shares $158.32 million -5.5%2.0%1.3 $164.18 11/15/20241,020,000 shares $161.65 million -6.4%2.1%1.4 $158.48 10/31/20241,090,000 shares $216.27 million -14.2%2.2%1.7 $198.41 10/15/20241,270,000 shares $259.56 million -5.9%2.6%1.9 $204.38 Get the Latest News and Ratings for ONTO and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Onto Innovation and its competitors with MarketBeat's FREE daily newsletter. 9/30/20241,350,000 shares $280.22 million +39.1%2.8%2.1 $207.57 9/15/2024970,500 shares $191.98 million +19.7%2.0%1.3 $197.82 8/31/2024810,800 shares $172.88 million +14.3%1.7%1.2 $213.22 8/15/2024709,100 shares $149.54 million -0.3%1.5%1 $210.89 7/31/2024710,900 shares $136.00 million -13.1%1.5%1 $191.30 7/15/2024818,400 shares $187.58 million -45.1%1.7%1.3 $229.20 6/30/20241,490,000 shares $327.14 million -8.6%3.1%2.5 $219.56 6/15/20241,630,000 shares $357.70 million +6.5%3.3%3.5 $219.45 5/31/20241,530,000 shares $331.70 million -14.5%3.1%3.4 $216.80 5/15/20241,790,000 shares $418.13 million +2.3%3.7%4.2 $233.59 4/30/20241,750,000 shares $324.52 million +14.4%3.6%3.9 $185.44 4/15/20241,530,000 shares $280.31 million +21.4%3.1%3.6 $183.21 3/31/20241,260,000 shares $228.16 million -6.0%2.6%3 $181.08 3/15/20241,340,000 shares $235.08 million -6.3%2.8%3.3 $175.43 2/29/20241,430,000 shares $263.35 million +3.6%2.9%3.5 $184.16 2/15/20241,380,000 shares $243.68 million -8.6%2.8%3.4 $176.58 1/31/20241,510,000 shares $243.79 million +9.4%3.1%3.9 $161.45 1/15/20241,380,000 shares $199.04 million -13.2%2.8%3.5 $144.23 12/31/20231,590,000 shares $243.11 million -3.6%3.3%2.7 $152.90 12/15/20231,650,000 shares $248.87 million +5.8%3.4%2.8 $150.83 11/30/20231,560,000 shares $220.24 million -4.3%3.2%2.7 $141.18 11/15/20231,630,000 shares $223.51 million -6.3%3.4%2.7 $137.13 10/31/20231,740,000 shares $195.54 million -9.4%3.6%2.9 $112.38 10/15/20231,920,000 shares $265.15 million +1.1%4.0%3.3 $138.10 9/30/20231,900,000 shares $242.29 million +9.8%3.9%5.1 $127.52 9/15/20231,730,000 shares $215.30 million +14.6%3.6%4.9 $124.45 8/31/20231,510,000 shares $209.78 million +14.4%3.1%4.1 $138.93 8/15/20231,320,000 shares $147.89 million +28.2%2.7%3.7 $112.04 7/31/20231,030,000 shares $128.05 million +7.4%2.1%3 $124.32 7/15/2023959,200 shares $107.22 million +0.2%2.0%3 $111.78New “Trump” currency proposed in DC (Ad)According to one of the most connected men in Washington… A surprising new bill was just introduced in Washington. 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When you see what could happen – I think you’ll be excited. 6/30/2023957,300 shares $111.38 million -22.2%2.0%3.2 $116.35 6/15/20231,230,000 shares $130.20 million -0.8%2.5%4.3 $105.85 5/31/20231,240,000 shares $133.20 million +1.6%2.6%4.9 $107.42 5/15/20231,220,000 shares $114.00 million +8.9%2.5%5.2 $93.44 4/30/20231,120,000 shares $90.70 million +7.7%2.3%5 $80.98 4/15/20231,040,000 shares $85.84 million +6.2%2.2%4.7 $82.54 3/31/2023979,200 shares $86.05 million +3.0%2.0%4.4 $87.88 3/15/2023951,100 shares $80.68 million +11.2%2.0%4 $84.83 2/28/2023855,100 shares $70.52 million +8.2%1.8%3.7 $82.47 2/15/2023790,000 shares $65.16 million -6.4%1.6%3.6 $82.48 1/31/2023844,300 shares $66.40 million -4.3%1.7%3.9 $78.65 1/15/2023881,800 shares $68.36 million +4.6%1.8%3.8 $77.52 12/30/2022842,800 shares $57.39 million +6.3%1.7%3.2 $68.09 12/15/2022792,700 shares $57.42 million -16.3%1.6%2.9 $72.44 11/30/2022946,900 shares $75.70 million -15.5%1.9%3.6 $79.95 11/15/20221,120,000 shares $94.30 million -0.9%2.3%4.2 $84.20 10/31/20221,130,000 shares $75.53 million No ChangeN/A4.1 $66.84 10/15/20221,130,000 shares $66.72 million +17.3%N/A4.2 $59.04 9/30/2022963,100 shares $61.69 million -4.6%N/A3.7 $64.05 9/15/20221,010,000 shares $68.67 million +13.4%N/A3.4 $67.99 8/31/2022890,400 shares $63.21 million 0.0%N/A2.9 $70.99 8/15/2022890,600 shares $73.29 million -21.2%1.8%2.9 $82.29 7/31/20221,130,000 shares $94.07 million No Change2.3%3.6 $83.25 7/15/20221,130,000 shares $80.08 million -2.6%2.3%3.6 $70.87 6/30/20221,160,000 shares $80.90 million -7.9%2.4%3.7 $69.74 6/15/20221,260,000 shares $92.13 million +7.7%2.6%4.3 $73.12 5/31/20221,170,000 shares $94.04 million +37.4%2.4%4.3 $80.38 5/15/2022851,400 shares $61.92 million -2.3%1.7%3 $72.73 4/30/2022871,600 shares $62.01 million +10.0%1.8%3 $71.14 4/15/2022792,400 shares $54.18 million -34.5%1.6%2.6 $68.37 3/31/20221,210,000 shares $105.14 million +13.1%2.5%3.6 $86.89 3/15/20221,070,000 shares $83.33 million +7.0%2.2%3.2 $77.88 2/28/20221,000,000 shares $86.21 million +1.1%2.1%2.9 $86.21 2/15/2022988,800 shares $90.06 million -5.8%2.0%2.8 $91.08 1/31/20221,050,000 shares $96.12 million +21.4%2.2%3 $91.54 1/15/2022865,200 shares $91.68 million -8.9%1.8%2.6 $105.96 12/31/2021950,000 shares $96.17 million +1.7%2.0%3.4 $101.23 12/15/2021934,500 shares $89.71 million +1.4%1.9%3.5 $96.00 11/30/2021921,300 shares $86.75 million -0.1%1.9%3.6 $94.16 11/15/2021921,900 shares $81.37 million -17.7%1.9%3.9 $88.26 10/29/20211,120,000 shares $88.72 million -5.9%2.3%4.7 $79.21 10/15/20211,190,000 shares $85.92 million -8.5%2.5%4.8 $72.20 9/30/20211,300,000 shares $93.93 million +0.8%2.7%5.1 $72.25 9/15/20211,290,000 shares $101.97 million -6.5%2.7%4.9 $79.05 8/31/20211,380,000 shares $102.30 million -8.0%2.8%4.9 $74.13 8/13/20211,500,000 shares $108.29 million +13.6%3.1%5 $72.19 7/30/20211,320,000 shares $92.51 million -4.4%2.7%4.1 $70.08 7/15/20211,380,000 shares $91.22 million -5.5%2.9%4.3 $66.10 6/30/20211,460,000 shares $106.64 million -5.8%3.0%4.4 $73.04 6/15/20211,550,000 shares $115.10 million +4.7%3.2%4.4 $74.26Trump’s Final Plan (Ad)Presidential insider exposes shocking plot to reshape U.S. economy: The 2025 Trump Reset -- Inside Trump’s secret plan to trigger the greatest transfer of wealth since FDR and LBJ – trillions of dollars could be redistributed.Click here for the full story. 5/28/20211,480,000 shares $106.22 million +9.6%3.1%4 $71.77 5/14/20211,350,000 shares $78.58 million +16.4%2.8%3.5 $58.21 4/30/20211,160,000 shares $76.06 million -13.4%2.4%2.9 $65.57 4/15/20211,340,000 shares $93.57 million -5.6%2.8%3.4 $69.83 3/31/20211,420,000 shares $88.42 million +9.2%3.0%3.6 $62.27 3/15/20211,300,000 shares $83.16 million -1.5%2.8%3.3 $63.97 2/26/20211,320,000 shares $81.34 million -5.7%2.8%3.7 $61.62 2/12/20211,400,000 shares $85.86 million -13.6%3.0%4.2 $61.33 1/29/20211,620,000 shares $91.30 million -4.7%3.4%5.2 $56.36 1/15/20211,700,000 shares $96.99 million -0.6%3.6%6.1 $57.05 12/31/20201,710,000 shares $82.39 million -1.7%3.6%6.6 $48.18 12/15/20201,740,000 shares $80.91 million +2.4%3.7%6.9 $46.50 11/30/20201,700,000 shares $76.25 million +5.6%3.6%6.8 $44.85 11/15/20201,610,000 shares $65.19 million -4.7%3.4%6 $40.49 10/30/20201,690,000 shares $55.52 million -16.3%3.6%6.5 $32.85 10/15/20202,020,000 shares $69.25 million -2.4%4.3%7.3 $34.28 9/30/20202,070,000 shares $61.64 million -3.3%4.4%7 $29.78 9/15/20202,140,000 shares $61.76 million +2.9%4.6%6.6 $28.86 8/31/20202,080,000 shares $64.98 million +1.5%4.4%6.2 $31.24 8/14/20202,050,000 shares $71.71 million -11.3%4.4%6 $34.98 7/31/20202,310,000 shares $87.36 million -11.8%4.9%6.6 $37.82 7/15/20202,620,000 shares $91.05 million -7.8%5.6%7.5 $34.75 6/30/20202,840,000 shares $95.68 million -1.1%6.1%8 $33.69 6/15/20202,870,000 shares $96.26 million +5.1%6.1%7.6 $33.54 5/29/20202,730,000 shares $86.43 million +9.6%5.8%7 $31.66 5/15/20202,490,000 shares $78.86 million -16.4%5.3%6.4 $31.67 4/30/20202,980,000 shares $107.10 million -6.6%6.4%7.8 $35.94 4/15/20203,190,000 shares $104.73 million +12.7%6.6%8.7 $32.83 3/31/20202,830,000 shares $91.81 million +53.6%5.8%7.7 $32.44 ONTO Short Interest - Frequently Asked Questions What is Onto Innovation's current short interest? Short interest is the volume of Onto Innovation shares that have been sold short but have not yet been closed out or covered. As of February 28th, traders have sold 1,510,000 shares of ONTO short. 3.09% of Onto Innovation's shares are currently sold short. Learn More on Onto Innovation's current short interest. What is a good short interest ratio for Onto Innovation? 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. ONTO shares currently have a short interest ratio of 2.0. Learn More on Onto Innovation's short interest ratio. Which institutional investors are shorting Onto Innovation? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Onto Innovation: Wolverine Trading LLC, Citadel Advisors LLC, Jane Street Group LLC, Concourse Financial Group Securities Inc., PEAK6 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 Onto Innovation? 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. 3.09% of Onto Innovation's floating shares are currently sold short. Is Onto Innovation's short interest increasing or decreasing? Onto Innovation saw a increase in short interest during the month of February. As of February 28th, there was short interest totaling 1,510,000 shares, an increase of 23.8% from the previous total of 1,220,000 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 Onto Innovation's float size? Onto Innovation currently has issued a total of 49,270,000 shares. Some of Onto Innovation'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. Onto Innovation currently has a public float of 48,880,000 shares. How does Onto Innovation's short interest compare to its competitors? 3.09% of Onto Innovation's shares are currently sold short. Here is how the short interest of companies compare to Onto Innovation: Entegris, Inc. (5.26%), MKS Instruments, Inc. (4.73%), Amkor Technology, Inc. (5.47%), Advanced Energy Industries, Inc. (6.00%), FormFactor, Inc. (4.73%), Axcelis Technologies, Inc. (14.16%), Photronics, Inc. (4.15%), Veeco Instruments Inc. (9.60%), Ultra Clean Holdings, Inc. (2.24%), PDF Solutions, Inc. (1.83%), 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 ($23.74 billion), iShares 20+ Year Treasury Bond ETF ($10.75 billion), MicroStrategy Incorporated ($6.56 billion), Apollo Global Management, Inc. ($5.40 billion), Charter Communications, Inc. ($4.57 billion), AppLovin Co. ($4.45 billion), Capital One Financial Co. ($4.33 billion), Super Micro Computer, Inc. ($4.23 billion), Schlumberger Limited ($3.22 billion), and Royal Caribbean Cruises Ltd. ($3.06 billion). View all of the most shorted stocks. What does it mean to sell short Onto Innovation stock? Short selling ONTO is an investing strategy that aims to generate trading profit from Onto Innovation as its price is falling. ONTO shares are trading down $3.04 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 Onto Innovation? A short squeeze for Onto Innovation 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 ONTO, which in turn drives the price of the stock up even further. How often is Onto Innovation'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 ONTO, twice per month. The most recent reporting period available is February, 28 2025. More Short Interest Resources from MarketBeat Related Companies Entegris Short Interest MKS Instruments Short Interest Amkor Technology Short Interest Advanced Energy Industries Short Interest FormFactor Short Interest Axcelis Technologies Short Interest Photronics Short Interest Veeco Instruments Short Interest Ultra Clean Short Interest PDF Solutions 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:ONTO) was last updated on 3/26/2025 by MarketBeat.com Staff From Our PartnersTrump’s Final Plan Presidential insider exposes shocking plot to reshape U.S. economy: The 2025 Trump Reset -- Inside Trump’...Porter & Company | SponsoredDOGE could send 6 AI stocks through the roofStay alert for Elon Musk and the Department of Government Efficiency's next move … Expect an announcement f...Weiss Ratings | SponsoredNew “Trump” currency proposed in DCAccording to one of the most connected men in Washington… A surprising new bill was just introduced in Wash...Paradigm Press | SponsoredWhy Elon put $51 million into thisWhy Elon Musk Just Invested $51 Million Into Brand New “Miracle Metal” Developed by MIT ScientistsTrue Market Insiders | SponsoredURGENT: Someone's Moving Gold Out of London...People who don’t understand the gold market are about to lose a lot of money. 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