Axcelis Technologies (ACLS) Institutional Ownership $78.79 +0.10 (+0.13%) Closing price 09/4/2025 04:00 PM EasternExtended Trading$78.76 -0.03 (-0.04%) As of 09/4/2025 07:56 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 Ownership Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestSustainabilityTrendsBuy This Stock Institutional Ownership Changes (13F Filings) for Axcelis Technologies (NASDAQ:ACLS)CurrentInstitutional OwnershipPercentage89.98%Number ofInstitutional Buyers(last 12 months)250TotalInstitutional Inflows(last 12 months)$729.19MNumber ofInstitutional Sellers(last 12 months)134TotalInstitutional Outflows(last 12 months)$451.18M Get ACLS Insider Trade Alerts Want to know when executives and insiders are buying or selling Axcelis Technologies stock? Sign up for InsiderTrades.com's daily newsletter to get the latest insider transactions delivered to your inbox daily. 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Skip Chart & View Institutional Buying and Selling Data ACLS Institutional Buying and Selling by Quarter Axcelis Technologies Major Shareholders & Ownership History Export to ExcelReporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails9/4/2025 Osaic Holdings Inc.2,748$191K0.0%+36.2%0.009% 8/27/2025 Squarepoint Ops LLC100,023$6.97M0.0%+37.0%0.318% 8/26/2025 Thrivent Financial for Lutherans23,626$1.65M0.0%-13.7%0.075% 8/16/2025 Public Sector Pension Investment Board109,575$7.64M0.0%+6.3%0.349% 8/16/2025 Headlands Technologies LLC5,550$387K0.0%+918.3%0.018% 8/15/2025 CANADA LIFE ASSURANCE Co35,550$2.48M0.0%-4.0%0.113% 8/15/2025 Tower Research Capital LLC TRC 4,145$289K0.0%+86.9%0.013% 8/15/2025 State of Tennessee Department of Treasury9,923$692K0.0%-28.6%0.032% 8/15/2025 Vident Advisory LLC16,746$1.17M0.0%-11.7%0.053% 8/15/2025 Paradigm Capital Management Inc. NY88,100$6.14M0.3%-51.6%0.280% Get the Latest News and Ratings for ACLS and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Axcelis Technologies and its competitors with MarketBeat's FREE daily newsletter. 8/15/2025 HRT Financial LP22,275$1.55M0.0%-59.3%0.071% 8/15/2025 Holocene Advisors LP35,798$2.50M0.0%-63.0%0.114% 8/15/2025 BNP Paribas Financial Markets192,188$13.39M0.0%+42.3%0.612% 8/15/2025 Brevan Howard Capital Management LP26,987$1.88M0.0%N/A0.086% 8/15/2025 BlackBarn Capital Partners LP360,000$25.09M1.4%-25.1%1.146% 8/15/2025 Balyasny Asset Management L.P.90,748$6.32M0.0%N/A0.289% 8/15/2025 Bank of America Corp DE703,438$49.02M0.0%-23.5%2.239% 8/15/2025 Ameriprise Financial Inc.122,351$8.53M0.0%+22.6%0.389% 8/14/2025 California State Teachers Retirement System30,130$2.10M0.0%+1.2%0.096% 8/14/2025 Raymond James Financial Inc.16,746$1.17M0.0%-16.1%0.053% 8/14/2025 Canada Pension Plan Investment Board15,600$1.09M0.0%N/A0.050% 8/14/2025 Quantinno Capital Management LP7,592$529K0.0%+65.3%0.024% 8/14/2025 MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.17,672$1.23M0.0%-8.9%0.056% 8/14/2025 Globeflex Capital L P43,512$3.03M0.3%+134.5%0.138% 8/14/2025 The Manufacturers Life Insurance Company 16,736$1.17M0.0%-6.1%0.053% 8/14/2025 Squarepoint Ops LLC100,023$6.97M0.0%+37.0%0.318% 8/14/2025 Sei Investments Co.10,411$726K0.0%-92.8%0.033% 8/14/2025 Nebula Research & Development LLC16,839$1.17M0.1%-14.8%0.054% 8/14/2025 Soviero Asset Management LP48,000$3.35M2.0%N/A0.153% 8/14/2025 Qube Research & Technologies Ltd12,268$855K0.0%-33.6%0.039% 8/14/2025 iSAM Funds UK Ltd11,369$792K0.2%+41.1%0.036% 8/14/2025 State Street Corp1,248,708$87.02M0.0%+0.0%3.974% 8/14/2025 WINTON GROUP Ltd54,317$3.79M0.2%-46.4%0.173% 8/14/2025 Cerity Partners LLC5,670$395K0.0%N/A0.018% 8/14/2025 Federated Hermes Inc.221,164$15.41M0.0%+13.9%0.704% 8/13/2025 Amundi5,353$391K0.0%-99.0%0.017% 8/13/2025 First Trust Advisors LP70,034$4.88M0.0%+859.4%0.223% 8/13/2025 Kennedy Capital Management LLC133,206$9.28M0.2%+2.6%0.424% 8/13/2025 Optimize Financial Inc32,021$2.23M1.4%-0.7%0.102% 8/13/2025 EverSource Wealth Advisors LLC451$31K0.0%+145.1%0.001% 8/13/2025 Invesco Ltd.139,796$9.74M0.0%+1.1%0.445% 8/13/2025 Isthmus Partners LLC34,168$2.38M0.3%+8.1%0.109% 8/13/2025 Quantbot Technologies LP35,278$2.46M0.1%-45.8%0.112% 8/13/2025 Edgestream Partners L.P.15,396$1.07M0.0%N/A0.049% 8/13/2025 Lido Advisors LLC3,504$244K0.0%N/A0.011% 8/13/2025 Skandinaviska Enskilda Banken AB publ 2,637$184K0.0%-11.5%0.008% 8/13/2025 Norges Bank62,448$4.35M0.0%N/A0.199% 8/13/2025 Hsbc Holdings PLC14,345$1.01M0.0%N/A0.046% 8/13/2025 Grantham Mayo Van Otterloo & Co. LLC442,065$30.81M0.1%-23.7%1.407% 8/13/2025 Russell Investments Group Ltd.11,365$792K0.0%-4.6%0.036% 8/12/2025 Boston Partners474,043$33.62M0.0%+42.3%1.509% 8/12/2025 Advisors Asset Management Inc.1,825$127K0.0%-7.3%0.006% 8/12/2025Jefferies Financial Group Inc.18,089$1.26M0.0%N/A0.058% 8/12/2025 Prudential Financial Inc.33,415$2.33M0.0%+5.0%0.106% 8/12/2025 American Century Companies Inc.1,659,463$115.65M0.1%+45.5%5.282% 8/12/2025 Rhumbline Advisers94,758$6.60M0.0%-2.0%0.302% 8/12/2025 AXQ Capital LP6,914$482K0.2%N/A0.022% 8/12/2025 Franklin Resources Inc.23,281$1.62M0.0%-1.5%0.074% 8/12/2025 Legal & General Group Plc88,596$6.17M0.0%-15.8%0.282% 8/12/2025 JPMorgan Chase & Co.177,867$12.40M0.0%+4.6%0.566% 8/12/2025 Magnetar Financial LLC5,769$402K0.0%-53.9%0.018% 8/12/2025 Swiss National Bank61,500$4.29M0.0%-2.4%0.196% 8/12/2025 Handelsbanken Fonder AB8,100$564K0.0%-20.6%0.026% 8/12/2025 Bank Julius Baer & Co. Ltd Zurich5,000$348K0.0%-17.8%0.016% 8/12/2025 Dynamic Technology Lab Private Ltd5,610$391K0.1%-52.8%0.018% 8/12/2025 Ensign Peak Advisors Inc9,966$695K0.0%-25.4%0.032% 8/11/2025 Empirical Finance LLC3,300$230K0.0%N/A0.011% 8/11/2025 Primecap Management Co. CA852,296$59.40M0.0%+2.1%2.713% 8/11/2025 Universal Beteiligungs und Servicegesellschaft mbH28,000$1.95M0.0%+98.5%0.089% 8/8/2025 Cetera Investment Advisers3,995$278K0.0%-27.2%0.013% 8/8/2025 Creative Planning67,212$4.68M0.0%+41.7%0.214% 8/8/2025 Commonwealth of Pennsylvania Public School Empls Retrmt SYS8,249$575K0.0%+6.0%0.026% 8/8/2025 ABN Amro Investment Solutions17,390$1.21M0.0%N/A0.055% 8/8/2025 Breed s Hill Capital LLC3,000$209K0.1%N/A0.010% 8/8/2025 Police & Firemen s Retirement System of New Jersey7,465$520K0.0%+7.6%0.024% 8/8/2025 Geode Capital Management LLC925,305$64.49M0.0%0.0%2.945% 8/8/2025 PNC Financial Services Group Inc.2,131$149K0.0%-9.6%0.007% 8/8/2025 KBC Group NV1,069$74K0.0%-31.3%0.003% 8/7/2025 Boston Partners474,043$33.62M0.0%+42.3%1.509% 8/7/2025 CENTRAL TRUST Co1,350$94K0.0%+1,094.7%0.004% 8/7/2025 Vise Technologies Inc.2,870$200K0.0%N/A0.009% 8/7/2025 ProShare Advisors LLC14,363$1.00M0.0%-1.0%0.045% 8/7/2025 Profund Advisors LLC3,019$210K0.0%N/A0.009% 8/7/2025 Mitsubishi UFJ Asset Management Co. Ltd.54,521$3.80M0.0%+62.6%0.170% 8/7/2025 Jackson Square Partners LLC35,049$2.44M0.9%-83.3%0.109% 8/7/2025 Parkside Financial Bank & Trust1,105$77K0.0%+48.5%0.003% 8/7/2025Aviva PLC7,530$525K0.0%-26.1%0.023% 8/6/2025 Fox Run Management L.L.C.27,543$1.92M0.3%N/A0.086% 8/6/2025 First Eagle Investment Management LLC73,000$5.09M0.0%N/A0.227% 8/6/2025 Savant Capital LLC4,064$283K0.0%N/A0.013% 8/6/2025 Andra AP fonden17,990$1.25M0.0%-10.0%0.056% 8/6/2025 Moors & Cabot Inc.7,630$532K0.0%-2.6%0.024% 8/5/2025 Bank of New York Mellon Corp226,063$15.75M0.0%+6.4%0.704% 8/5/2025 Bank of Montreal Can5,864$409K0.0%-2.4%0.018% 8/5/2025 Wakefield Asset Management LLLP18,067$1.26M0.4%N/A0.056% 8/1/2025 James Investment Research Inc.3,976$277K0.0%N/A0.012% 8/1/2025 Mizuho Markets Cayman LP42,420$2.96M0.2%N/A0.132% 8/1/2025 Envestnet Asset Management Inc.38,260$2.67M0.0%+52.7%0.119% 7/31/2025 Nisa Investment Advisors LLC3,002$209K0.0%+277.1%0.009% 7/31/2025 Oppenheimer Asset Management Inc.6,972$486K0.0%+11.2%0.022% (Data available from 1/1/2016 forward) ACLS Institutional Ownership - Frequently Asked Questions Who are the largest shareholders of ACLS shares? During the previous two years, 439 institutional investors and hedge funds held shares of Axcelis Technologies. The most heavily invested institutionals were Vanguard Group Inc. ($220.53M), American Century Companies Inc. ($115.65M), Reinhart Partners LLC. ($105.83M), State Street Corp ($87.02M), Geode Capital Management LLC ($64.49M), Primecap Management Co. CA ($59.40M), and Boston Trust Walden Corp ($58.95M).Learn more on Axcelis Technologies' institutional investors. What percentage of Axcelis Technologies' stock is owned by institutional investors? 89.98% of Axcelis Technologies' stock is owned by institutional investors. Learn more on ACLS's institutional investor holdings. Which institutional investors have been buying Axcelis Technologies' stock? Of the 368 institutional investors that purchased Axcelis Technologies' stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: Reinhart Partners LLC. ($1.52M), Norges Bank ($1.02M), American Century Companies Inc. ($951.92K), Boston Trust Walden Corp ($845.91K), Pacer Advisors Inc. ($781.15K), Boston Partners ($561.72K), and Jackson Square Partners LLC ($516.52K). How much institutional buying is happening at Axcelis Technologies? Institutional investors have bought a total of 10,266,756 shares in the last 24 months. This purchase volume represents approximately $728.74M in transactions. Which of Axcelis Technologies' major shareholders have been selling company stock? Of the 134 institutional investors that sold Axcelis Technologies' stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: Senvest Management LLC ($660.69K), Pacer Advisors Inc. ($620.67K), Amundi ($545.69K), Ameriprise Financial Inc. ($505.85K), Paradigm Capital Management Inc. NY ($417K), Jackson Square Partners LLC ($232.05K), and Bank of America Corp DE ($215.97K). How much institutional selling is happening at Axcelis Technologies? Institutional investors have sold a total of 6,232,823 shares in the last 24 months. This volume of shares sold represents approximately $451.18M in transactions. 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