Synlogic (SYBX) Institutional Ownership $1.36 -0.02 (-1.38%) Closing price 08/7/2025 03:55 PM EasternExtended Trading$1.38 +0.02 (+1.77%) As of 08/7/2025 07:26 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 AnalysisChartCompetitorsEarningsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock Institutional Ownership Changes (13F Filings) for Synlogic (NASDAQ:SYBX)CurrentInstitutional OwnershipPercentage63.40%Number ofInstitutional Buyers(last 12 months)0Number ofInstitutional Sellers(last 12 months)2TotalInstitutional Outflows(last 12 months)$190.92K Get SYBX Insider Trade Alerts Want to know when executives and insiders are buying or selling Synlogic stock? 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Email Address Skip Chart & View Institutional Buying and Selling Data SYBX Institutional Buying and Selling by Quarter Synlogic Major Shareholders & Ownership History Export to ExcelReporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails2/13/2025Renaissance Technologies LLC22,310$31K0.0%-69.0%0.191% 11/13/2024FMR LLC166,724$248K0.0%-27.6%1.425% 8/9/2024Renaissance Technologies LLC100,530$151K0.0%-15.1%0.859% 2/13/2024Armistice Capital LLC1,055,000$4.06M0.1%+75.9%11.480% 1/8/2024 Harbor Capital Advisors Inc.30,685$118K0.0%+43.4%0.334% 11/15/2023Armistice Capital LLC599,874$1.69M0.0%N/A13.098% 11/13/2023WINTON GROUP Ltd12,401$35K0.0%N/A0.271% 10/20/2023 Harbor Capital Advisors Inc.21,403$60K0.0%-92.6%0.467% 7/31/2023PVG Asset Management Corp68,455$29K0.1%-31.7%0.100% 7/11/2023 Harbor Capital Advisors Inc.290,605$125K0.0%+10.1%0.426% Get the Latest News and Ratings for SYBX and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Synlogic and its competitors with MarketBeat's FREE daily newsletter. 4/26/2023 Harbor Capital Advisors Inc.264,026$167K0.0%-15.3%0.387% 1/13/2023 Flagship Harbor Advisors LLC40,000$30K0.0%-28.6%0.057% 11/14/2022RA Capital Management L.P.4,618,415$4.39M0.1%-20.7%6.576% 11/14/2022UBS Oconnor LLC465,741$442K0.0%-14.2%0.663% 10/28/2022 Harbor Capital Advisors Inc.318,309$302K0.3%-10.0%0.453% 8/12/2022Ikarian Capital LLC474,360$545K0.1%-8.7%0.675% 8/4/2022Royce & Associates LP434,041$499K0.0%-10.3%0.618% 5/5/2022 UMA Financial Services Inc.17,302$30K0.0%N/A0.025% 4/28/2022 Harbor Capital Advisors Inc.354,998$852K0.4%-18.9%0.509% 2/15/2022Stonepine Capital Management LLC1,064,135$2.58M1.2%+6.4%1.527% 2/14/2022Opaleye Management Inc.850,000$2.06M0.4%N/A1.219% 2/14/2022LMR Partners LLP550,000$1.33M0.0%+10.0%0.789% 2/10/2022Acadian Asset Management LLC77,655$186K0.0%+796.3%0.111% 2/10/2022Connor Clark & Lunn Investment Management Ltd.32,161$78K0.0%N/A0.046% 2/9/2022Dimensional Fund Advisors LP632,168$1.53M0.0%-11.4%0.907% 2/4/2022 Harbor Capital Advisors Inc.437,550$1.06M0.4%N/A0.628% 11/16/2021Suvretta Capital Management LLC60,000$183K0.0%N/A0.115% 11/16/2021Two Sigma Advisers LP402,900$1.23M0.0%-41.4%0.769% 11/16/2021Two Sigma Investments LP447,650$1.37M0.0%-32.9%0.855% 11/16/2021Laurion Capital Management LP80,100$244K0.0%N/A0.153% 11/15/2021RA Capital Management L.P.6,666,666$20.33M0.3%N/A12.729% 11/15/2021Caas Capital Management LP50,000$153K0.0%N/A0.095% 11/15/2021Dimensional Fund Advisors LP713,889$2.18M0.0%-25.1%1.363% 11/15/2021Franklin Resources Inc.101,700$310K0.0%N/A0.194% 11/12/2021Renaissance Technologies LLC188,672$575K0.0%-28.6%0.360% 11/12/2021Stonepine Capital Management LLC1,000,000$3.05M1.4%N/A1.909% 11/12/2021Magnetar Financial LLC32,881$100K0.0%N/A0.063% 11/9/2021BlackRock Inc.372,959$1.14M0.0%+1.6%0.712% 11/9/2021Monashee Investment Management LLC150,000$458K0.1%N/A0.286% 11/2/2021Raymond James & Associates11,000$34K0.0%N/A0.021% Trump’s national nightmare is here (Ad)Porter Stansberry and Jeff Brown say a new U.S. national emergency is already underway — and it could trigger the biggest forced rotation of capital since World War II. They reveal why Trump is mobilizing America’s tech giants… and name the two stocks most likely to soar as trillions shift behind the scenes.Watch the National Emergency broadcast here10/29/2021 Janney Montgomery Scott LLC11,000$34K0.0%-53.2%0.021% 9/22/2021Nan Fung Group Holdings Ltd68,634$267K0.1%N/A0.131% 9/17/2021Virtu Financial LLC56,307$219K0.0%N/A0.108% 8/18/2021Ikarian Capital LLC848,354$3.30M0.3%-43.2%1.620% 8/17/2021Bridgeway Capital Management LLC253,000$984K0.0%+11.7%0.483% 8/16/2021Squarepoint Ops LLC41,599$162K0.0%-67.3%0.079% 8/16/2021LMR Partners LLP300,000$1.17M0.0%N/A0.573% 8/16/2021Alyeska Investment Group L.P.800,000$3.11M0.0%N/A1.528% 8/16/2021Maven Securities LTD100,000$403K0.0%N/A0.191% 8/16/2021Charles Schwab Investment Management Inc.17,418$68K0.0%N/A0.033% 8/16/2021State Street Corp75,056$292K0.0%N/A0.143% 8/13/2021Renaissance Technologies LLC264,091$1.03M0.0%-15.8%0.504% 8/13/2021Northern Trust Corp68,865$268K0.0%+81.2%0.131% 8/13/2021Geode Capital Management LLC257,061$999K0.0%+45.1%0.491% 8/13/2021Vanguard Group Inc.1,727,371$6.72M0.0%+105.8%3.298% 8/13/2021FMR LLC7,855,233$30.56M0.0%N/A14.999% 8/12/2021Dimensional Fund Advisors LP952,835$3.71M0.0%-1.9%1.819% 8/11/2021 Bank of New York Mellon Corp68,580$267K0.0%-13.7%0.131% 5/19/2021Squarepoint Ops LLC127,313$456K0.0%N/A0.312% 5/18/2021D. E. Shaw & Co. Inc.14,167$51K0.0%-92.4%0.035% (Data available from 1/1/2016 forward) SYBX Institutional Ownership - Frequently Asked Questions Who are the largest shareholders of SYBX shares? During the previous two years, the following institutional investors and hedge funds held shares of Synlogic shares: Armistice Capital LLC ($4.06M), FMR LLC ($248K), Harbor Capital Advisors Inc. ($118K), and WINTON GROUP Ltd ($35K), Renaissance Technologies LLC ($31K).Learn more on Synlogic's institutional investors. What percentage of Synlogic's stock is owned by institutional investors? 63.40% of Synlogic's stock is owned by institutional investors. Learn more on SYBX's institutional investor holdings. Which institutional investors have been buying Synlogic's stock? The following institutional investors have purchased Synlogic's stock in the last 24 months: Armistice Capital LLC ($1.06M), WINTON GROUP Ltd ($12.40K), and Harbor Capital Advisors Inc. ($9.28K). Which of Synlogic's major shareholders have been selling company stock? The following institutional investors have sold Synlogic stock in the last 24 months: Renaissance Technologies LLC ($67.52K), and FMR LLC ($63.49K). How much institutional selling is happening at Synlogic? Institutional investors have sold a total of 131,008 shares in the last 24 months. This volume of shares sold represents approximately $190.92K in transactions. 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