Eos Energy Enterprises, Inc.

Eos Energy Enterprises, Inc. originated as B. Riley Principal 150 Merger Corp. (Nasdaq: BMRG), a blank-check company sponsored by B. Riley Principal Investments, LLC that completed its initial public offering in 2020. The vehicle targeted the energy storage sector and closed its business combination with Eos Energy Enterprises in November 2020, bringing the zinc-based long-duration battery storage company to the public markets; the combined entity subsequently traded on Nasdaq under the ticker EOSE. Eos filed an 8-K current report with the SEC on August 5, 2026, disclosing a material corporate event. For full filing details, historical SPAC data, and deal analytics, sign up at SpacDesk.