Greenwich LifeSciences GLSI Institutional Ownership

Updated Oct 10, 2026

Greenwich LifeSciences, Inc. (NASDAQ:GLSI) was reported as a holding by 59 institutional investors in 13F filings for the quarter ended June 30, 2026.

• These investors held 11.49% of outstanding shares in Q2 2026, down from 11.69% the quarter before.
• Total shares held in Greenwich LifeSciences fell 1.62% from Q1 2026, while the number of holders rose 22.92% from Q2 2025.
• Looking at the 59 holders of GLSI individually, 32 added to their positions, 15 reduced their stakes and 12 left their positions unchanged.
• In total, institutional investors held 1.69Mn shares of Greenwich LifeSciences at the end of Q2 2026, down 27.82K from the prior quarter and up 481.07K from a year earlier.
• As of June 30, 2026, the biggest holder of Greenwich LifeSciences was BlackRock, Inc. with 485.85K shares, or 3.31% of shares outstanding.
• The biggest increases in GLSI positions during Q2 2026 came from BlackRock, Inc. (+51.99K shares), Vanguard Portfolio Management LLC (+21.95K shares), Morgan Stanley (+13.62K shares), Geode Capital Management, LLC (+12.71K shares) and State Street Corp (+9.21K shares).
• The largest position reductions in GLSI for Q2 2026 were by Ancora Advisors LLC (-26.76K shares), Vanguard Capital Management LLC (-20.08K shares), Russell Investments Group, Ltd. (-5.34K shares), EverSource Wealth Advisors, LLC (-1.98K shares) and Raymond James Financial Inc (-700 shares).
• Per Business Quant data, the 10 largest holders of Greenwich LifeSciences at the end of Q2 2026 were BlackRock, Inc. (485.85K shares), Vanguard Capital Management LLC (278.19K shares), Geode Capital Management, LLC (168.18K shares), State Street Corp (143.09K shares), Vanguard Portfolio Management LLC (80.86K shares), Northern Trust Corp (80.23K shares), Bank of New York Mellon Corp (47.9K shares), Vanguard Fiduciary Trust Co (45.97K shares), Morgan Stanley (43.45K shares) and Goldman Sachs Group Inc (39.33K shares).