Eos Energy Enterprises, Inc. (EOSE) Insider Ownership

Data spanning the past 90 days through February 19, 2026 reveals that Eos Energy Enterprises's three principal insider shareholders consist of TenPercentOwner Riley Financial, Inc. B. (5.37Mn shares), Director Russell Monoki Stidolph (2.41Mn shares), Chief Executive Officer Joe Mastrangelo (1.40Mn shares).

• The shareholding composition of Eos Energy Enterprises (EOSE) reflects broad market participation, with institutional funds owning 78.15%, executive insider stakes representing 5.70%, with public and others accounting for 16.15%.
• Current insider holdings at Eos Energy Enterprises account for 5.70% of total shares outstanding as of February 19, 2026, totaling roughly 14.40Mn shares from the company's 252.59Mn share base.
• Insider ownership levels at Eos Energy Enterprises decreased 4.38% across the 90-day window ending February 19, 2026, reflecting insider holdings that declining from 15.06Mn shares to 14.40Mn shares.
• Throughout the 90-day period ending February 19, 2026, Director Russell Monoki Stidolph led insider buying activity at Eos Energy Enterprises, acquiring 371.44K shares.
• As of February 19, 2026, Director Russell Monoki Stidolph executed the most significant insider divestiture at Eos Energy Enterprises, disposing of 976.44K shares over the last 90-day period.