Eos Energy Enterprises, Inc.

Eos Energy Enterprises, Inc. emerged from a business combination with B. Riley Principal 150 Merger Corp., a blank-check company that traded under the ticker BMRG and was sponsored by B. Riley Financial. The SPAC completed its initial public offering in 2020, targeting the energy and industrials sector, and closed its merger with Eos Energy — a developer of zinc-based battery storage technology for grid-scale applications — later that year. The post-combination entity filed an 8-K with the SEC on October 17, 2025, constituting a required material corporate disclosure. For full filing details and comprehensive SPAC deal analytics, sign up for SpacDesk.