ACM Research (ACMR) Short Interest Ratio & Short Volume $38.07 -1.61 (-4.06%) Closing price 10/17/2025 04:00 PM EasternExtended Trading$38.12 +0.05 (+0.13%) As of 10/17/2025 07:57 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 ForecastsChartCompetitorsEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock ACM Research Short Interest DataACM Research (ACMR) has a short interest of 5.36 million shares. This marks a 25.23% increase in short interest from the previous month. The short interest ratio (days to cover) is 3.2, indicating that it would take 3.2 days of the average trading volume of 2.26 million shares to cover all short positions.Current Short Interest5,360,000 sharesPrevious Short Interest4,280,000 sharesChange Vs. Previous Month+25.23%Dollar Volume Sold Short$209.74 millionShort Interest Ratio3.2 Days to CoverLast Record DateSeptember 30, 2025Outstanding Shares59,160,000 sharesPercentage of Shares Shorted9.06%Today's Trading Volume1,117,620 sharesAverage Trading Volume2,261,570 sharesToday's Volume Vs. Average49% Short Selling ACM Research? Sign up to receive the latest short interest report for ACM Research and its competitors with MarketBeat's FREE newsletter. Email Address Get Report View SMS TermsBy entering your phone number and clicking the sign-up button, you agree to receive periodic text messages from MarketBeat at the phone number you submitted, including texts that may be sent using an automatic telephone dialing system. Message and data rates may apply. Message frequency will vary. Messages will consist of stock alerts, news stories, and partner advertisements/offers. Consent is not a condition of the purchase of any goods or services. Text HELP for help/customer support. 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Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartACMR Short Interest Over TimeACMR Days to Cover Over TimeACMR Percentage of Float Shorted Over Time ACM Research Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 9/30/20255,360,000 shares $209.74 million +25.2%N/A3.2 $39.13 9/15/20254,280,000 shares $127.67 million +3.9%N/A3 $29.83 8/31/20254,120,000 shares $116.27 million +2.5%9.3%3.6 $28.22 8/15/20254,020,000 shares $100.58 million +28.0%N/A3.7 $25.02 7/31/20253,140,000 shares $95.33 million -2.8%7.1%3 $30.36 7/15/20253,230,000 shares $95.16 million -3.3%N/A3 $29.46 6/30/20253,340,000 shares $86.51 million -11.6%7.6%2.7 $25.90 6/15/20253,780,000 shares $92.12 million +8.6%8.6%2.7 $24.37 5/31/20253,480,000 shares $77.88 million -6.0%8.8%2.3 $22.38 5/15/20253,700,000 shares $90.02 million -18.9%9.3%2.1 $24.33 Get the Latest News and Ratings for ACMR and Related StocksEnter your email address below to receive the latest news and analysts' ratings for ACM Research and its competitors with MarketBeat's FREE daily newsletter. 4/30/20254,560,000 shares $88.78 million +38.2%N/A2.4 $19.47 4/15/20253,300,000 shares $67.65 million -2.1%8.3%1.8 $20.50 3/31/20253,370,000 shares $78.66 million -4.8%8.5%1.9 $23.34 3/15/20253,540,000 shares $103.30 million -10.4%8.9%2.2 $29.18 2/28/20253,950,000 shares $102.46 million -3.9%10.0%2.4 $25.94 2/15/20254,110,000 shares $97.74 million +17.8%10.4%2.6 $23.78 1/31/20253,490,000 shares $71.72 million -16.7%N/A2.4 $20.55 1/15/20254,190,000 shares $74.96 million -6.1%N/A3.2 $17.89 12/31/20244,460,000 shares $67.35 million +3.5%N/A3.3 $15.10 12/15/20244,310,000 shares $67.19 million +10.0%N/A2.7 $15.59 11/30/20243,920,000 shares $67.38 million -1.8%N/A2.5 $17.19 11/15/20243,990,000 shares $73.14 million -12.3%N/A3 $18.33 10/31/20244,550,000 shares $85.52 million -8.1%N/A3.5 $18.80 10/15/20244,950,000 shares $96.87 million +4.7%N/A3.5 $19.57 9/30/20244,730,000 shares $96.02 million -4.6%N/A3.2 $20.30 9/15/20244,960,000 shares $83.33 million +7.8%N/A4 $16.80 8/31/20244,600,000 shares $82.98 million +0.2%N/A3.5 $18.04 8/15/20244,590,000 shares $93.22 million +2.0%N/A3.5 $20.31 7/31/20244,500,000 shares $80.78 million +13.9%N/A3.2 $17.95 7/15/20243,950,000 shares $100.80 million -6.8%N/A3.2 $25.52 6/30/20244,240,000 shares $97.77 million +5.0%N/A3.5 $23.06 6/15/20244,040,000 shares $95.10 million +3.1%N/A3.3 $23.54 5/31/20243,920,000 shares $84.67 million -3.5%N/A3.1 $21.60 5/15/20244,060,000 shares $96.91 million +7.1%N/A2.4 $23.87 4/30/20243,790,000 shares $96.72 million -6.7%N/A2.2 $25.52 4/15/20244,060,000 shares $114.53 million +12.2%N/A2.4 $28.21 3/31/20243,620,000 shares $105.49 million +11.4%N/A2 $29.14 3/15/20243,250,000 shares $88.11 million -32.3%N/A1.9 $27.11 2/29/20244,800,000 shares $148.42 million +33.0%N/A3.1 $30.92 2/15/20243,610,000 shares $72.09 million -2.7%N/A3.2 $19.97 1/31/20243,710,000 shares $63.89 million +4.5%N/A3.6 $17.22 1/15/20243,550,000 shares $77.43 million +14.5%N/A3 $21.81 12/31/20233,100,000 shares $60.57 million -4.3%N/A2.6 $19.54 12/15/20233,240,000 shares $58.00 million +13.3%N/A2.8 $17.90 11/30/20232,860,000 shares $47.59 million -3.4%N/A2.4 $16.64 11/15/20232,960,000 shares $53.99 million +0.7%N/A2.4 $18.24 10/31/20232,940,000 shares $39.98 million +11.8%N/A2.3 $13.60 10/15/20232,630,000 shares $49.97 million +7.8%N/A2.5 $19.00 9/30/20232,440,000 shares $44.18 million +22.6%N/A2.8 $18.11 9/15/20231,990,000 shares $30.88 million +10.6%N/A2.4 $15.52 8/31/20231,800,000 shares $31.61 million -11.3%N/A2.2 $17.56 8/15/20232,030,000 shares $27.30 million +3.6%N/A2.8 $13.45 7/31/20231,960,000 shares $25.68 million No ChangeN/A2.9 $13.10 7/15/20231,960,000 shares $26.13 million -4.4%N/A3.1 $13.33 6/30/20232,050,000 shares $26.81 million -6.8%N/A3.3 $13.08 6/15/20232,200,000 shares $25.12 million +2.3%N/A4 $11.42 5/31/20232,150,000 shares $21.74 million -3.6%N/A3.9 $10.11 5/15/20232,230,000 shares $21.61 million +7.7%N/A3.5 $9.69 4/30/20232,070,000 shares $19.35 million -6.3%N/A3.1 $9.35 4/15/20232,210,000 shares $23.32 million -5.2%N/A3.1 $10.55 3/31/20232,330,000 shares $27.26 million +1.3%N/A3 $11.70 3/15/20232,300,000 shares $28.18 million -3.4%N/A2.6 $12.25 2/28/20232,380,000 shares $24.70 million -17.4%N/A2.6 $10.38 2/15/20232,880,000 shares $40.84 million +5.1%N/A3.5 $14.18 1/31/20232,740,000 shares $34.22 million +0.4%N/A3.2 $12.49 1/15/20232,730,000 shares $29.54 million -4.9%N/A2.7 $10.82 12/30/20222,870,000 shares $22.13 million -42.8%N/A2.5 $7.71 12/15/20225,020,000 shares $45.88 million +3.3%N/A5 $9.14 11/30/20224,860,000 shares $44.03 million +38.5%N/A5.3 $9.06 11/15/20223,510,000 shares $34.05 million -17.6%N/A3.5 $9.70 10/31/20224,260,000 shares $27.26 million -6.0%N/A4.5 $6.40 10/15/20224,530,000 shares $36.15 million -7.9%N/A5.3 $7.98 9/30/20224,920,000 shares $61.30 million -1.2%N/A6.9 $12.46 9/15/20224,980,000 shares $78.09 million -5.3%N/A5.8 $15.68 8/31/20225,260,000 shares $88.84 million -14.3%N/A5.9 $16.89 8/15/20226,140,000 shares $120.41 million -8.9%N/A6.9 $19.61 7/31/20226,740,000 shares $113.77 million -14.0%N/A7.7 $16.88 7/15/20227,840,000 shares $123.09 million +20.4%N/A9.8 $15.70 6/30/20226,510,000 shares $109.56 million +52.1%N/A7.5 $16.83 6/15/20224,280,000 shares $61.85 million -5.7%N/A5 $14.45 5/31/20224,540,000 shares $68.83 million +14.1%N/A4.2 $15.16 5/15/20223,980,000 shares $54.33 million -11.2%N/A3.7 $13.65 4/30/20224,480,000 shares $67.69 million -2.6%N/A4.1 $15.11 4/15/20224,600,000 shares $76.54 million +7.2%N/A4.3 $16.64 3/31/20224,290,000 shares $88.76 million -8.9%N/A4.1 $20.69 3/15/20224,710,000 shares $74.26 million +299.2%N/A4.7 $15.77 2/28/20221,180,000 shares $97.26 million +10.3%8.7%5.1 $82.42 2/15/20221,070,000 shares $90.78 million +1.9%7.9%4.1 $84.84 1/31/20221,050,000 shares $83.63 million -9.5%7.7%3.9 $79.65 1/15/20221,160,000 shares $102.86 million -6.5%8.5%4.2 $88.67 12/31/20211,240,000 shares $105.73 million +1.6%9.1%4.4 $85.27 12/15/20211,220,000 shares $89.35 million -6.2%9.0%4 $73.24 11/30/20211,300,000 shares $113.65 million -15.6%9.6%4.1 $87.42 11/15/20211,540,000 shares $169.85 million -16.8%11.4%4.8 $110.29 10/29/20211,850,000 shares $196.41 million +17.8%13.7%5.5 $106.17 10/15/20211,570,000 shares $165.35 million -4.9%11.7%4.3 $105.32 9/30/20211,650,000 shares $181.50 million -7.8%12.3%4.2 $110.00 9/15/20211,790,000 shares $180.58 million -5.3%13.3%4.7 $100.88 8/31/20211,890,000 shares $168.49 million +35.0%14.2%4.8 $89.15 8/13/20211,400,000 shares $116.73 million +48.5%10.7%3.9 $83.38 7/30/2021943,100 shares $87.58 million -20.8%7.3%2.6 $92.86 7/15/20211,190,000 shares $92.51 million +19.1%9.4%3.7 $77.74 6/30/2021998,800 shares $102.10 million +0.9%7.9%3.1 $102.22 6/15/2021990,400 shares $95.50 million -6.6%7.8%3.4 $96.43 5/28/20211,060,000 shares $80.54 million +7.5%8.4%3.9 $75.98 5/14/2021985,800 shares $63.63 million +4.9%7.8%3.3 $64.55 4/30/2021940,200 shares $75.22 million +2.7%7.5%2.9 $80.00 4/15/2021915,500 shares $74.81 million -12.0%7.3%3 $81.72 3/31/20211,040,000 shares $82.27 million +4.8%8.5%3.1 $79.11 3/15/2021992,200 shares $90.91 million +15.7%8.1%2.8 $91.62 2/26/2021857,800 shares $93.71 million -0.8%7.0%2.5 $109.25 2/12/2021864,500 shares $103.26 million -8.4%7.1%2.8 $119.44 1/29/2021943,600 shares $86.56 million -11.8%7.8%3.3 $91.73 1/15/20211,070,000 shares $108.84 million -1.8%8.8%3.7 $101.72 12/31/20201,090,000 shares $88.07 million +1.9%9.0%3.8 $80.80 12/15/20201,070,000 shares $78.92 million -0.9%9.0%4 $73.76 11/30/20201,080,000 shares $90.42 million -7.7%9.2%3.5 $83.72 11/15/20201,170,000 shares $98.75 million +2.6%10.0%3.5 $84.40 10/30/20201,140,000 shares $86.06 million +6.5%9.7%3.3 $75.49 ACMR Short Interest - Frequently Asked Questions What is ACM Research's current short interest? Short interest is the volume of ACM Research shares that have been sold short but have not yet been covered or closed out. As of September 30th, investors have sold 5,360,000 shares of ACMR short. Learn More on ACM Research's current short interest. What is a good short interest ratio for ACM Research? 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. ACMR shares currently have a short interest ratio of 3.0. Learn More on ACM Research's short interest ratio. Which institutional investors are shorting ACM Research? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of ACM Research: Squarepoint Ops LLC, Group One Trading LLC, Jane Street Group LLC, Squarepoint Ops LLC, Walleye Capital LLC, Walleye Trading LLC, and JPMorgan Chase & Co.. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission. Is ACM Research's short interest increasing or decreasing? ACM Research saw a increase in short interest during the month of September. As of September 30th, there was short interest totaling 5,360,000 shares, an increase of 25.2% from the previous total of 4,280,000 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 ACM Research's short interest compare to its competitors? Here is how the short interest of companies in the industry of "machinery" compare to ACM Research: SPX Technologies, Inc. (2.07%), Zurn Elkay Water Solutions Cor (3.95%), JBT Marel Corporation (5.57%), ESAB Corporation (1.89%), Gates Industrial Corporation PLC (2.91%), Weatherford International PLC (5.08%), Hayward Holdings, Inc. (5.98%), Hesai Group Sponsored ADR (4.10%), Solaris Energy Infrastructure, Inc. (31.71%), Cactus, Inc. (3.61%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: AppLovin Corporation ($15.71 billion), Robinhood Markets, Inc. ($7.56 billion), Reddit Inc. ($4.55 billion), Coinbase Global, Inc. ($4.53 billion), CoreWeave Inc. ($4.43 billion), Charter Communications, Inc. ($4.07 billion), Seagate Technology Holdings PLC ($3.94 billion), IonQ, Inc. ($3.78 billion), TC Energy Corporation ($3.13 billion), and Live Nation Entertainment, Inc. ($3.12 billion). View all of the most shorted stocks. What does it mean to sell short ACM Research stock? Short selling ACMR is an investing strategy that aims to generate trading profit from ACM Research as its price is falling. ACMR shares are trading down $1.61 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 ACM Research? A short squeeze for ACM Research 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 ACMR, which in turn drives the price of the stock up even further. How often is ACM Research'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 ACMR, twice per month. The most recent reporting period available is September, 30 2025. More Short Interest Resources from MarketBeat Related Companies SPX Technologies Short Interest Data Zurn Elkay Water Solutions Cor Short Interest Data JBT Marel Short Interest Data ESAB Short Interest Data Gates Industrial Short Interest Data Weatherford International Short Interest Data Hayward Short Interest Data Hesai Group Short Interest Data Solaris Energy Infrastructure Short Interest Data Cactus 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:ACMR) was last updated on 10/19/2025 by MarketBeat.com Staff From Our PartnersCapital Gains Tax Strategies for SeniorsCapital gains taxes can take a bite out of your retirement income—unless you have a smart strategy. 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