Eos Energy Enterprises EOSE Institutional Ownership

Updated Oct 11, 2026

Eos Energy Enterprises, Inc. (NASDAQ:EOSE) was reported as a holding by 350 institutional investors in 13F filings for the quarter ended June 30, 2026.

• These investors held 67.07% of outstanding shares in Q2 2026, up from 60.32% the quarter before.
• Total shares held in Eos Energy Enterprises rose 11.26% from Q1 2026, while the number of holders rose 65.09% from Q2 2025.
• Looking at the 350 holders of EOSE individually, 214 added to their positions, 101 reduced their stakes and 35 left their positions unchanged.
• Institutional investors held 227.9Mn shares of Eos Energy Enterprises in total at the end of Q2 2026, up 23.07Mn from the prior quarter and up 101.13Mn from a year earlier.
• As of June 30, 2026, the biggest holder of Eos Energy Enterprises was BlackRock, Inc. with 27.13Mn shares, or 7.98% of shares outstanding.
• Holders that added the most shares of Eos Energy Enterprises in Q2 2026 were Susquehanna International Group, LLP (+3.33Mn shares), BlackRock, Inc. (+3.05Mn shares), Legal & General Group PLC (+2.85Mn shares), Morgan Stanley (+2.35Mn shares) and State Street Corp (+2.14Mn shares).
• Holders that trimmed the most shares of Eos Energy Enterprises in Q2 2026 while keeping a position were Marshall Wace, LLP (-6.24Mn shares), Citadel Advisors LLC (-2.79Mn shares), Marex Group Ltd (-2.03Mn shares), Group One Trading LLC (-1.95Mn shares) and Goldman Sachs Group Inc (-1.89Mn shares).
• Per Business Quant, the top 10 investors in EOSE for the quarter ended June 30, 2026 were BlackRock, Inc. (27.13Mn shares), Vanguard Capital Management LLC (15.02Mn shares), Hudson Bay Capital Management LP (13.68Mn shares), Driehaus Capital Management LLC (13.56Mn shares), Two Sigma Investments, LP (12.78Mn shares), State Street Corp (10.15Mn shares), Susquehanna International Group, LLP (9.68Mn shares), Geode Capital Management, LLC (8.89Mn shares), Electron Capital Partners, LLC (6.68Mn shares) and Morgan Stanley (5.31Mn shares).