IO Biotech (IOBT) Institutional Ownership $0.53 +0.03 (+5.80%) Closing price 04:00 PM EasternExtended Trading$0.54 +0.01 (+1.06%) As of 07:58 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 ForecastsChartCompetitorsEarningsFDA EventsHeadlinesInsider TradesOwnershipSEC FilingsShort InterestTrendsBuy This Stock Institutional Ownership Changes (13F Filings) for IO Biotech (NASDAQ:IOBT)CurrentInstitutional OwnershipPercentage54.76%Number ofInstitutional Buyers(last 12 months)9TotalInstitutional Inflows(last 12 months)$1.57MNumber ofInstitutional Sellers(last 12 months)7TotalInstitutional Outflows(last 12 months)$1.38M Get IOBT Insider Trade Alerts Want to know when executives and insiders are buying or selling IO Biotech stock? 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Skip Chart & View Institutional Buying and Selling Data IOBT Institutional Buying and Selling by Quarter IO Biotech Major Shareholders & Ownership History Export to ExcelReporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails8/19/2025Marex Group plc45,000$63K0.0%N/A0.000% 8/15/2025Bank of America Corp DE1,615,074$2.25M0.0%-2.2%0.000% 8/14/2025NewEdge Advisors LLC24,217$34K0.0%N/A0.037% 8/12/2025XTX Topco Ltd29,189$41K0.0%-42.2%0.000% 5/21/2025Acadian Asset Management LLC30,858$33K0.0%-49.1%0.047% 5/19/2025Jane Street Group LLC23,717$26K0.0%N/A0.036% 5/15/2025Landscape Capital Management L.L.C.400,234$436K0.0%-9.5%0.608% 5/8/2025XTX Topco Ltd50,486$55K0.0%+80.0%0.077% 5/7/2025Dauntless Investment Group LLC681,446$743K0.9%-8.9%1.034% 2/17/2025Bridgeway Capital Management LLC174,000$160K0.0%-12.8%0.264% Get the Latest News and Ratings for IOBT and Related StocksEnter your email address below to receive the latest news and analysts' ratings for IO Biotech and its competitors with MarketBeat's FREE daily newsletter. 2/17/2025Citadel Advisors LLC270,504$249K0.0%N/A0.411% 2/14/2025Dauntless Investment Group LLC747,646$688K0.7%N/A1.135% 2/13/2025XTX Topco Ltd28,040$26K0.0%N/A0.043% 2/13/2025Renaissance Technologies LLC118,800$109K0.0%+22.5%0.180% 2/12/2025Landscape Capital Management L.L.C.442,196$407K0.0%N/A0.671% 1/30/2025Vontobel Holding Ltd.32,667$30K0.0%N/A0.050% 10/24/2024Novo Holdings A S3,354,449$3.52M0.2%-24.3%5.092% 8/20/2024Novo Holdings A S4,429,449$5.18M0.3%-12.9%6.723% 8/15/2024Armistice Capital LLC1,545,000$1.81M0.0%-10.4%2.345% 8/12/2024XTX Topco Ltd26,555$31K0.0%+67.4%0.040% 8/9/2024Renaissance Technologies LLC180,800$212K0.0%+8.1%0.274% 2/15/2024PFM Health Sciences LP2,341,107$4.40M0.3%+73.0%3.554% 2/13/2024Stonepine Capital Management LLC1,666,037$3.13M1.4%-15.7%2.529% 2/13/2024Armistice Capital LLC1,924,000$3.62M0.0%-10.4%2.920% 11/15/2023Armistice Capital LLC2,148,000$3.03M0.0%N/A3.260% 11/14/2023Stonepine Capital Management LLC1,975,308$2.79M0.9%N/A2.998% 11/14/2023Pivotal bioVenture Partners Investment Advisor LLC864,197$1.22M0.5%N/A1.312% 11/8/2023Vivo Capital LLC6,173,439$8.71M1.1%+104.7%9.371% 7/25/2023Summit Trail Advisors LLC43,744$86K0.0%N/A0.152% 2/14/2023RA Capital Management L.P.1,127,260$2.59M0.1%-39.3%3.911% 11/14/2022Psagot Value Holdings Ltd. Israel40,846$111K0.0%N/A0.142% 11/2/2022Victory Capital Management Inc.43,741$119K0.0%N/A0.152% 2/15/2022Samsara BioCapital LLC1,120,437$7.17M1.4%N/A3.888% 2/15/2022Capital World Investors1,235,000$8.11M0.0%N/A4.286% 2/14/2022Soleus Capital Management L.P.672,734$4.31M0.4%N/A2.335% 2/14/2022Novo Holdings A S3,277,932$20.98M1.0%N/A11.376% (Data available from 1/1/2016 forward) IOBT Institutional Ownership - Frequently Asked Questions Who are the largest shareholders of IOBT shares? During the previous two years, 18 institutional investors and hedge funds held shares of IO Biotech. The most heavily invested institutionals were Vivo Capital LLC ($8.71M), PFM Health Sciences LP ($4.40M), Novo Holdings A S ($3.52M), Stonepine Capital Management LLC ($3.13M), Bank of America Corp DE ($2.25M), Armistice Capital LLC ($1.81M), and Pivotal bioVenture Partners Investment Advisor LLC ($1.22M).Learn more on IO Biotech's institutional investors. What percentage of IO Biotech's stock is owned by institutional investors? 54.76% of IO Biotech's stock is owned by institutional investors. Learn more on IOBT's institutional investor holdings. Which institutional investors have been buying IO Biotech's stock? Of the 14 institutional investors that purchased IO Biotech's stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: Vivo Capital LLC ($3.16M), Armistice Capital LLC ($2.15M), Stonepine Capital Management LLC ($1.98M), PFM Health Sciences LP ($987.65K), Pivotal bioVenture Partners Investment Advisor LLC ($864.20K), Dauntless Investment Group LLC ($747.65K), and Landscape Capital Management L.L.C. ($442.20K). How much institutional buying is happening at IO Biotech? Institutional investors have bought a total of 1,658,233 shares in the last 24 months. This purchase volume represents approximately $1.57M in transactions. Which of IO Biotech's major shareholders have been selling company stock? The following institutional investors have sold IO Biotech stock in the last 24 months: Novo Holdings A S ($1.08M), Dauntless Investment Group LLC ($66.20K), Landscape Capital Management L.L.C. ($41.96K), Bank of America Corp DE ($36.44K), Acadian Asset Management LLC ($29.79K), Bridgeway Capital Management LLC ($25.62K), and XTX Topco Ltd ($21.30K). How much institutional selling is happening at IO Biotech? Institutional investors have sold a total of 1,296,315 shares in the last 24 months. This volume of shares sold represents approximately $1.38M in transactions. 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