Koss (KOSS) Institutional Ownership $6.21 -0.20 (-3.12%) Closing price 08/28/2025 04:00 PM EasternExtended Trading$6.40 +0.19 (+3.00%) As of 07:00 AM 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 AnalysisChartCompetitorsEarningsHeadlinesInsider TradesOwnershipSEC FilingsShort InterestTrendsBuy This Stock Institutional Ownership Changes (13F Filings) for Koss (NASDAQ:KOSS)CurrentInstitutional OwnershipPercentage6.21%Number ofInstitutional Buyers(last 12 months)5TotalInstitutional Inflows(last 12 months)$888.79KNumber ofInstitutional Sellers(last 12 months)1TotalInstitutional Outflows(last 12 months)$11.78K Get KOSS Insider Trade Alerts Want to know when executives and insiders are buying or selling Koss stock? 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Skip Chart & View Institutional Buying and Selling Data KOSS Institutional Buying and Selling by Quarter Koss Major Shareholders & Ownership History Export to ExcelReporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails8/8/2025 Geode Capital Management LLC58,328$298K0.0%-3.8%0.622% 2/17/2025 Citadel Advisors LLC28,725$212K0.0%N/A0.307% 2/14/2025 Jane Street Group LLC16,982$125K0.0%N/A0.182% 2/13/2025 Marshall Wace LLP60,580$447K0.0%N/A0.648% 2/11/2025 Virtu Financial LLC12,399$92K0.0%N/A0.133% 11/16/2024 Geode Capital Management LLC61,211$452K0.0%+2.9%0.655% 8/9/2024 Dimensional Fund Advisors LP145,958$650K0.0%+7.2%1.577% 2/9/2022 Dimensional Fund Advisors LP154,546$1.65M0.0%+5.4%1.691% 2/8/2022 CIBC Private Wealth Group LLC546,528$5.84M0.0%N/A5.981% 11/15/2021 Dimensional Fund Advisors LP146,611$2.40M0.0%+5.4%1.604% 8/17/2021 Millennium Management LLC56,306$1.31M0.0%+140.1%0.661% 8/16/2021 State Street Corp26,574$617K0.0%N/A0.312% 8/16/2021 CIBC Private Wealth Group LLC546,528$12.69M0.0%+5,557.1%6.417% 8/13/2021 Northern Trust Corp12,634$293K0.0%-9.6%0.148% 8/13/2021 LPL Financial LLC14,153$329K0.0%N/A0.166% 8/13/2021 Geode Capital Management LLC36,094$838K0.0%+21.4%0.424% 8/13/2021 Vanguard Group Inc.164,178$3.81M0.0%+248.7%1.928% 8/12/2021 Dimensional Fund Advisors LP139,043$3.23M0.0%-7.6%1.633% (Data available from 1/1/2016 forward) KOSS Institutional Ownership - Frequently Asked Questions Who are the largest shareholders of KOSS shares? During the previous two years, the following institutional investors and hedge funds held shares of Koss shares: Dimensional Fund Advisors LP ($650K), Marshall Wace LLP ($447K), Geode Capital Management LLC ($298K), Citadel Advisors LLC ($212K), and Jane Street Group LLC ($125K), Virtu Financial LLC ($92K).Learn more on Koss' institutional investors. What percentage of Koss' stock is owned by institutional investors? 6.21% of Koss' stock is owned by institutional investors. Learn more on KOSS's institutional investor holdings. Which institutional investors have been buying Koss' stock? The following institutional investors have purchased Koss' stock in the last 24 months: Marshall Wace LLP ($60.58K), Citadel Advisors LLC ($28.73K), Jane Street Group LLC ($16.98K), Virtu Financial LLC ($12.40K), Dimensional Fund Advisors LP ($9.81K), and Geode Capital Management LLC ($1.74K). How much institutional buying is happening at Koss? Institutional investors have bought a total of 120,430 shares in the last 24 months. This purchase volume represents approximately $888.79K in transactions. Which of Koss' major shareholders have been selling company stock? The following institutional investors have sold Koss stock in the last 24 months: Geode Capital Management LLC ($2.31K). How much institutional selling is happening at Koss? Institutional investors have sold a total of 2,310 shares in the last 24 months. This volume of shares sold represents approximately $11.78K in transactions. 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