SELLAS Life Sciences Group (SLS) Institutional Ownership $1.92 0.00 (0.00%) Closing price 08/29/2025 04:00 PM EasternExtended Trading$1.94 +0.02 (+0.78%) As of 08/29/2025 07:59 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 SELLAS Life Sciences Group (NASDAQ:SLS)CurrentInstitutional OwnershipPercentage17.38%Number ofInstitutional Buyers(last 12 months)22TotalInstitutional Inflows(last 12 months)$20.34MNumber ofInstitutional Sellers(last 12 months)2TotalInstitutional Outflows(last 12 months)$49.34K Get SLS Insider Trade Alerts Want to know when executives and insiders are buying or selling SELLAS Life Sciences Group 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 SLS Institutional Buying and Selling by Quarter SELLAS Life Sciences Group Major Shareholders & Ownership History Export to ExcelReporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails8/15/2025 Great Valley Advisor Group Inc.20,000$44K0.0%N/A0.019% 8/15/2025 Bank of America Corp DE34,579$76K0.0%+5,459.3%0.033% 8/14/2025 MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.52,210$114K0.0%N/A0.052% 8/14/2025 The Manufacturers Life Insurance Company 34,551$76K0.0%N/A0.035% 8/13/2025 Marshall Wace LLP2,715,489$5.95M0.0%+23,550.0%2.721% 8/13/2025 Invesco Ltd.50,166$110K0.0%N/A0.050% 8/13/2025 New York State Common Retirement Fund49,300$108K0.0%N/A0.049% 8/12/2025 XTX Topco Ltd76,900$168K0.0%N/A0.077% 8/12/2025 Rhumbline Advisers135,789$297K0.0%N/A0.136% 8/12/2025 JPMorgan Chase & Co.61,892$136K0.0%N/A0.062% Get the Latest News and Ratings for SLS and Related StocksEnter your email address below to receive the latest news and analysts' ratings for SELLAS Life Sciences Group and its competitors with MarketBeat's FREE daily newsletter. 8/8/2025 Intech Investment Management LLC46,217$101K0.0%N/A0.046% 8/8/2025 Police & Firemen s Retirement System of New Jersey23,351$51K0.0%N/A0.023% 8/8/2025 Geode Capital Management LLC2,200,428$4.82M0.0%+168.2%2.205% 8/7/2025 ProShare Advisors LLC19,571$43K0.0%N/A0.020% 8/4/2025 Simon Quick Advisors LLC20,000$44K0.0%N/A0.020% 7/24/2025 Blair William & Co. IL16,002$35K0.0%N/A0.016% 5/14/2025 Anson Funds Management LP7,579,095$8.19M1.3%+535.7%7.596% 5/12/2025 Virtu Financial LLC53,861$58K0.0%+30.9%0.057% 2/28/2025 Brooklyn FI LLC594,919$677K0.1%N/A0.845% 2/17/2025 Anson Funds Management LP1,192,266$1.24M0.1%+50.2%1.694% 2/14/2025 Northern Trust Corp134,721$140K0.0%+33.6%0.191% 2/13/2025 XTX Topco Ltd53,426$56K0.0%-14.9%0.076% 2/12/2025 Geode Capital Management LLC733,546$763K0.0%+21.2%1.042% 2/11/2025 Virtu Financial LLC41,155$43K0.0%-48.1%0.058% 2/11/2025 Brooklyn FI LLC594,919$677K0.0%N/A0.845% 1/31/2025 Opus Capital Group LLC238,500$248K0.0%+5.5%0.339% 11/20/2024 Virtu Financial LLC79,241$99K0.0%+24.1%0.113% 11/16/2024 Geode Capital Management LLC605,191$757K0.0%+17.1%0.941% 11/15/2024 Anson Funds Management LP793,835$992K0.0%N/A1.234% 11/15/2024 XTX Topco Ltd62,785$78K0.0%N/A0.098% 11/15/2024 State Street Corp174,529$218K0.0%+30.2%0.271% 8/9/2024 Renaissance Technologies LLC32,446$39K0.0%N/A0.056% 5/20/2024 Virtu Financial LLC39,429$40K0.0%-34.2%0.068% 5/14/2024 Anson Funds Management LP4,832,368$4.88M0.3%N/A8.366% 4/26/2024 Opus Capital Group LLC200,600$203K0.0%+48.6%0.356% 2/13/2024 Armistice Capital LLC820,000$869K0.0%N/A2.558% 1/31/2024 Opus Capital Group LLC135,000$143K0.0%+291.3%0.421% 9/12/2023 Prosperity Financial Group Inc.29,800$47K0.0%N/A0.105% 5/11/2023 Highbridge Capital Management LLC1,805,054$2.58M0.0%N/A6.367% 1/18/2023 Opus Capital Group LLC19,672$46K0.0%N/A0.096% This is my Christian duty (Ad)“This land I will give to you…” — a 4,000-year-old line from Genesis may hold the key to unlocking a $150 trillion vault of untapped American wealth. Former CIA advisor Jim Rickards calls it the “Old Testament Wealth Code” — and says it could transform your financial future. He’s revealing everything in a new presentation.Watch Jim Rickards reveal the Old Testament Wealth Code11/15/2022Empery Asset Management LP308,466$623K3.7%-66.8%1.501% 2/14/2022 GSA Capital Partners LLP10,447$58K0.0%N/A0.066% 2/11/2022 Equitable Holdings Inc.102,000$564K0.0%+2.0%0.642% 11/12/2021 Jump Financial LLC14,627$134K0.0%N/A0.092% 11/12/2021 Equitable Holdings Inc.100,000$916K0.0%+6.0%0.630% 11/12/2021 Geode Capital Management LLC133,801$1.23M0.0%+32.0%0.843% 8/25/2021 Marshall Wace LLP84,544$938K0.0%+63.0%0.533% 8/17/2021 Price T Rowe Associates Inc. MD15,500$172K0.0%-42.8%0.103% 8/16/2021 Morgan Stanley15,499$172K0.0%+297.4%0.103% 8/16/2021Pinz Capital Management LP10,700$119K0.0%-18.3%0.071% 8/16/2021 State Street Corp37,468$416K0.0%N/A0.248% 8/16/2021 Marshall Wace LLP84,544$938K0.0%+63.0%0.560% 8/13/2021 Northern Trust Corp24,605$273K0.0%+35.9%0.163% 8/13/2021 Geode Capital Management LLC101,337$1.12M0.0%+6.8%0.672% 8/13/2021 Vanguard Group Inc.618,534$6.87M0.0%+31.6%4.100% 8/12/2021 Dimensional Fund Advisors LP20,320$226K0.0%+31.9%0.135% 8/12/2021 Bank of Montreal Can109,282$1.43M0.0%N/A0.724% 8/11/2021 Bank of New York Mellon Corp20,332$226K0.0%+30.3%0.135% (Data available from 1/1/2016 forward) SLS Institutional Ownership - Frequently Asked Questions Who are the largest shareholders of SLS shares? During the previous two years, 25 institutional investors and hedge funds held shares of SELLAS Life Sciences Group. The most heavily invested institutionals were Anson Funds Management LP ($8.19M), Marshall Wace LLP ($5.95M), Geode Capital Management LLC ($4.82M), Armistice Capital LLC ($869K), Brooklyn FI LLC ($677K), Rhumbline Advisers ($297K), and Opus Capital Group LLC ($248K).Learn more on SELLAS Life Sciences Group's institutional investors. What percentage of SELLAS Life Sciences Group's stock is owned by institutional investors? 17.38% of SELLAS Life Sciences Group's stock is owned by institutional investors. Learn more on SLS's institutional investor holdings. Which institutional investors have been buying SELLAS Life Sciences Group's stock? Of the 25 institutional investors that purchased SELLAS Life Sciences Group's stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: Anson Funds Management LP ($12.41M), Marshall Wace LLP ($2.70M), Geode Capital Management LLC ($1.60M), Brooklyn FI LLC ($1.19M), Armistice Capital LLC ($820K), Opus Capital Group LLC ($178.50K), and XTX Topco Ltd ($139.69K). How much institutional buying is happening at SELLAS Life Sciences Group? Institutional investors have bought a total of 13,887,039 shares in the last 24 months. This purchase volume represents approximately $20.34M in transactions. Which of SELLAS Life Sciences Group's major shareholders have been selling company stock? The following institutional investors have sold SELLAS Life Sciences Group stock in the last 24 months: Virtu Financial LLC ($38.09K), and XTX Topco Ltd ($9.36K). How much institutional selling is happening at SELLAS Life Sciences Group? Institutional investors have sold a total of 47,445 shares in the last 24 months. This volume of shares sold represents approximately $49.34K in transactions. Related Companies Dianthus Therapeutics Major Shareholders GH Research Major Shareholders Maravai LifeSciences Major Shareholders Theravance Biopharma Major Shareholders Upexi Major Shareholders MeiraGTx Major Shareholders Arbutus Biopharma Major Shareholders KalVista Pharmaceuticals Major Shareholders Kura Oncology Major Shareholders Bicara Therapeutics Major Shareholders This page (NASDAQ:SLS) was last updated on 8/31/2025 by MarketBeat.com Staff From Our PartnersINVESTOR ALERT: Tiny “$3 AI Wonder Stock” on the Verge of Blasting OffRight now, we’re witnessing a monumental shift in the world.Traders Agency | SponsoredBONUS GUIDE - Ben Stein Prepares For the Next Financial CrisisWith inflation high, debt soaring, and global tensions rising, a financial storm may be brewing. 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