Fourth State

Private

Ann Arbor, MichiganEnergy & Sustainabilityhttps://www.fourthstatetech.com/

Last Round

Grant

Apr 8, 2026

Total Funding Raised

$2.57M

Company Overview

Fourth State is a clean technology company that develops modular plasma reactor technology for the destruction of PFAS and other persistent contaminants in water.

Sector

Energy & Sustainability

Verticals

Water Treatment, Clean Manufacturing

Business Model

B2B

Customer Profile

Government Contracts, Hardware Sales

AI Layer

Non-AI

Keywords

PFAS destructionplasma water treatmentforever chemicalswater purificationmodular plasma reactorindustrial water treatmentwastewater treatmentPFAS remediationchemical-free waterenvironmental techwater techclean water tech

Historical Pricing

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Fourth State Comps

Public and private peers based on sector, stage, and business model.

Fourth State comps — public and private peers by sector, stage, and business model
Company	Status	Est. Valuation	Rev Multiple
OpenAI	Private	$86.0B	~40x
Cohere	Private	$5.0B	--
Competitor 1	Public	$XX.XB	XXx
Competitor 2	Public	$XX.XB	XXx

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Fourth State Funding Rounds

Historical fundraising activity

Data table
Round	Date	Amount Raised	Valuation	Investors	Sources
Grant	Apr 8, 2026
Grant	Oct 29, 2025
Accelerator	Jul 14, 2025
Seed	Jan 10, 2022
Grant	Feb 10, 2021
Grant	Jan 22, 2020

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Key People

Founding team and executive leadership

Joseph Groele

CEO & Co-Founder

Founding Team

Fourth State Investors

Notable investors and investment history

Fourth State investors
Investor	Rounds
Cyclotron Road	Accelerator
U.S. Department of War	Grant
California Energy Commission	Grant
Activate	Accelerator
Department of Energy	Accelerator, Grant

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Fourth State Filings

SEC and related filings with document metadata.

Data table
Typed	Date	Amount Offered	Amount Sold	Filling	Pages	Download
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Fourth State Filings

SEC and related filings with document metadata.

Frequently Asked Questions

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Firmographic Details

HeadquartersAnn Arbor, Michigan

Employee Range3

Year FoundedN/A

Last FundingApr 8, 2026

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