When was Eos founded?

Eos was founded in 2008 and raised its 1st funding round 1 year after it was founded.

Where is Eos located?

Eos is headquartered in Edison, United States.

Who is the current CEO of Eos?

Michael Oster and Joe Mastrangelo s of Eos.

How many employees does Eos have?

As of Aug 31, 2026, the latest employee count at Eos is 480.

Is Eos a funded company?

Eos is a funded company, having raised a total of $65M across 11 funding rounds to date. The company's 1st funding round was a $***** Seed round, raised on Jul 08, 2009.

When was the latest funding round of Eos?

Eos' latest funding was a $***** Post IPO round on Nov 28, 2025, with participation from 0 investor.

What is the annual revenue of Eos?

Annual revenue of Eos is between $100M and $500M as on Dec 31, 2025

Where does Eos rank among its competitors?

Eos ranks 2nd amongst 14 active competitors, of which 4 are funded. It stands 2nd in terms of total funding among its competitors. The most recent competitor to raise funding was Voya Energy, which secured $35M in Aug, 2026.

Who are the top competitors of Eos?

Eos' top competitors include Form Energy, Sthyr Energy and e-Zinc. Among them, Voya Energy secured the most recent funding round in August, 2026.

Eos - 2026 Company Profile, Team, Funding, Competitors & Financials

Eos is a public company based in Edison (United States), founded in 2008 by Michael Oster. It operates as a Provider of zinc based energy storage solutions. Eos has raised $65M in funding from investors like Fisher Brothers, NRG Energy and AltEnergy. The company has 14 active competitors, including 4 funded and 2 that have exited. Its top competitors include companies like Form Energy, Sthyr Energy and e-Zinc.

Company Details

Provider of zinc based energy storage solutions. It provides solutions for energy storage using aqueous zinc technology. It offers safe, scalable, efficient, and sustainable zinc-based energy storage systems for utility and commercial customers.

Website: www.eose.com/
Social
Email ID: *****@eose.com

Key Metrics

Founded Year

2008

Location

Edison, United States

Stage

Public

Total Funding

$65M in 11 rounds

Latest Funding Round

Post IPO, Nov 28, 2025, $*****

Investors

Fisher Brothers & 10 more

Ranked

2^nd among 14 active competitors

Annual Revenue

$100M - $500M as on Dec 31, 2025

Employee Count

480 as on Aug 31, 2026

Similar Companies

Sthyr Energy & 6 more

Exit Details

Public

View Eos' full profile

Eos is associated with 2 legal entities given below:

Legal Entity Name	Date of Incorporation	Revenue	Latest Employee Count	Documents
Eos Energy Storage Llc CIN: 20231037736 , United States, Active	Jan 10, 2023	-	-	-
EOS ENERGY ENTERPRISES, INC. CIN: 1805077 , United States, Active	Jun 02, 2019	$100M - $500M (As on Dec 31, 2025)	-	-

Eos got listed on Jun 03, 2020.

Click here to take a look at Eos's IPO in detail

Eos has raised a total funding of $65M over 11 rounds. Its first funding round was on Jul 08, 2009. Eos has 11 institutional investors.

Here is the list of recent funding rounds of Eos:

Filter this list

Date of Funding	Funding Amount	Round Name	Post-Money Valuation	Revenue Multiple	Lead Investors	Other Investors
Nov 28, 2025	6738663	Post IPO	9839439	6453651	3918133	6558950
Jan 19, 2023	4457213	Post IPO	4588795	6036961	9642736	Clear Creek Investments & 2 more
Jul 08, 2021	1730309	Post IPO	8813365	3956016	3768475	Koch Industries

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View details of Eos's funding rounds and investors

The founders of Eos is Michael Oster. Joe Mastrangelo is the CEO of Eos.

Here are the details of Eos' key team members:

Michael Oster: Co-Founder & CEO of Eos and founder of 1 other company.
Joe Mastrangelo: CEO of Eos.
Contact Info: 1 email address

View details of Eos's Founder profiles and Board Members

Eos' employee count trend

Eos has 480 employees as of Aug 26. Here is Eos's employee count trend over the years:

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Top competitors of Eos include Form Energy, Sthyr Energy and e-Zinc. Here is the list of Top 10 competitors of Eos, ranked by Tracxn score:

Rank	Company Details	Short Description	Total Funding	Investors	Tracxn Score
1st	Form Energy 2017, Somerville (United States), Series G	Clean energy technology platform developing long-duration iron-air battery systems	$2B	T. Rowe Price, ArcelorMittal & 45 others	69/100
2nd	Eos 2008, Edison (United States), Public	Provider of zinc based energy storage solutions	$65M	Trinity Capital, NRG Energy & 9 others	68/100
3rd	Sthyr Energy 2024, Chennai (India), Seed	Developer of zinc-air battery technology for long-duration energy storage solutions	$1M	Speciale Invest, Antares Ventures	47/100
4th	e-Zinc 2012, Toronto (Canada), Series A	Provider of rechargeable zinc batteries	$61.8M	Energy Foundry, Evok Innovations & 22 others	45/100
5th	Abound 2012, Vancouver (Canada), Public	Provider of battery technology for energy solution	-	Canadian Space Agency, Sustainable Development Technology Canada ... & 1 others	45/100
6th	Voya Energy 2025, Hayward (United States), Series A	Developer of energy generation devices utilizing recycled metal fuel sources	$35M	Energy Impact Partners, StepStone Group & 5 others	38/100
7th	NantEnergy 2006, Culver City (United States), Funding Raised	Manufacturer of the zinc-air energy storage system	-	OSTI	26/100
8th	ESI Asia Pacific Maryborough (Australia), Funding Raised	Provider of renewable energy storage battery solutions	-	Queensland Government	21/100
9th	Zincnyx Energy 2015, New York (United States), Funding Raised	Developer of energy storage solutions utilizing zinc-air battery technology	-	-	21/100
10th	ReZilient 2023, Trondheim (Norway), Unfunded	Developer of zinc-air flow battery technology for long-duration energy storage	-	-	16/100