Eos Energy Enterprises, Inc.

Eos Energy Enterprises, Inc. traces its public-market debut to B. Riley Principal 150 Merger Corp., a blank-check company sponsored by B. Riley Financial that traded under the ticker BMRG and completed its IPO in 2020 targeting the energy storage sector. The SPAC merged with Eos Energy, a developer of zinc-based long-duration battery storage systems, and the combined company subsequently listed on Nasdaq under the ticker EOSE. The 8-K filed on May 13, 2026, under accession number 0001628280-26-034367, represents a current report from the post-merger operating entity. For full filing history, sponsor data, and deal analytics on BMRG and related SPAC transactions, sign up for complete access on SpacDesk.