---
schema_version: "secwatch.filing_event.v1"
accession: "0001805077-25-000027"
form_type: "8-K"
ticker: "EOSE"
cik: "0001805077"
company_name: "Eos Energy Enterprises, Inc."
filed_at: "2025-03-27T23:59:59+00:00"
generated_at: "2026-05-24T04:08:21.404870+00:00"
event_type: "leadership"
sentiment: "positive"
materiality_score: 0.45
calibrated_materiality_score: 0.45
confidence: "high"
source: SEC EDGAR
---

# Eos Energy appoints former Exelon CFO Joseph Nigro to board of directors

## Summary
- Joseph Nigro, former CFO of Exelon and CEO of Constellation Energy, appointed effective March 26, 2025.
- Nigro will serve as Class II director on Audit and Leadership Development & Compensation Committees.
- Board expands to ten directors; Nigro receives $25k annual cash retainer and $150k equity retainer.
- Nigro currently serves on Talen Energy board and advises Blackstone's energy transition practice.
- Appointment strengthens board expertise as Eos scales zinc-based long-duration energy storage production.

## SEC filing metadata
- accession: 0001805077-25-000027
- form_type: 8-K
- ticker: EOSE
- cik: 0001805077
- company_name: Eos Energy Enterprises, Inc.
- filed_at: 2025-03-27T23:59:59+00:00
- event_type: leadership
- sentiment: positive
- materiality_score: 0.45
- calibrated_materiality_score: 0.45
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1805077/000180507725000027/0001805077-25-000027-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1805077/000180507725000027/eose-20250326.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001805077-25-000027
- JSON: https://secwatch.observer/filing/0001805077-25-000027.json
- Plain text: https://secwatch.observer/filing/0001805077-25-000027.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.