Eos Energy Enterprises

Eos Energy Enterprises (EOSE) is a publicly traded Long-Duration Storage company founded in 2008 and based in Edison, USA.

Eos Energy manufactures zinc-based battery systems for long-duration utility-scale energy storage. Market cap ~$100M; production scaling at Pennsylvania factory; targeting 3–12 hour duration market.

Aqueous zinc chemistry offers low-cost, safe, long-duration storage alternative to lithium for multi-hour applications.

eose.com Long-Duration StorageUSApublic · EOSE

At a glance

Total raised

Undisclosed

no public funding on record

Headcount

501-1k

approximate · public range

Headquarters

Edison

USA

Founded

2008

18 years active

Status

Public

Ticker · EOSE

Latest valuation

$500M

IPO · 2020

Funding history

Total raised

—

Rounds tracked

Latest stage

IPO

Latest valuation

$500M

Date	Stage	Amount	Valuation	Lead investors
Jul 8, 2026	Post-IPO	$75M	—	Hudson Bay Capital Management
Nov 24, 2025	Post-IPO	$458M	—

Eos Energy Enterprises

At a glance

Funding history

Stock performance

In the news

Eos Energy Enterprises wins contract for Golden Dome for America

Eos to provide energy storage for US Department of Defense ‘Golden Dome,’ releases preliminary Q2 financials

Eos Energy adds board member, names new chief legal officer

Eos Energy Enterprises Appoints Cybersecurity and Software Leader Haiyan Song to Board of Directors, Names Marie Martin Chief Legal Officer in Planned Transition

Frontier Power USA picks four sites to deploy 920MWh of Eos zinc hybrid-cathode BESS

Eos Energy Announces a Virtual Investor Presentation for Rights Offering

Leadership

Products

Eos Z3 Battery System

Open roles

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