Best Environment Companies in Wisconsin, United States
The 114 best Environment companies in Wisconsin, United States in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Charter Next Generation.
Our analysis of 90 Environment companies
$38.2b in tracked funding; 89% of the stack-profiled cohort runs cloud-native; funding activity peaked in 2025.
Ranked: Best Environment companies in Wisconsin
| # | Company | Disclosed funding | Last round | Stage | Founder | Founded | Tech stack | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Charter Next Generation Manufacturer of superior-quality coextruded, barrier, and monolayer films | $685M | — | Acquired | Kathy Bolhous CEO | 1998 | WordPressMySQLPHP+29 | — | — |
| 2 | SHINE Technologies Producer of nuclear isotopes using fusion techniques 69Patents top 17%Funding top 18%Innovation top 27%Growth top 34% All 10 signals ▾Patentstop 17% Fundingtop 18% Innovationtop 27% Growthtop 34% Techtop 37% Moattop 41% Talentbottom 49% Marketbottom 47% Globalbottom 42% Newsbottom 37% Patents: 228 patents matched (strict assignee match) · 220 filings since 2022 vs 8 in 2017-21 Funding: Raised $414M across 17 rounds · 17 rounds over 15 yrs (1.1/yr) rank vs industry peers · Fliar Intelligence Index 69/100 | $414M | 3 mo ago | Series D | Greg Piefer Founder & CEO | 2005 | WebflowApple iCloud MailMicrosoft 365+27 | 228 patents Advanced separation and processing of radioactive isotopes, nuclear fuel, and rare earth elements | 2 partnerships |
| 3 | SunVest Solar Turnkey solar solutions provider in the solar energy sector | $113M | 42 mo ago | Funding Raised | Matt Neumann Founder | 2009 | — | — | 1 award |
| 4 | Phoenix Neutron radiography and imaging solutions for aerospace, defense, and industrial sectors | $29M | 74 mo ago | Series B | — | 2005 | — | 208 patents High‑power ion‑beam neutron generators, neutron imaging hardware, and steel co‑product processing technologies. | — |
| 5 | Realta Fusion Developer of nuclear energy projects 37Funding top 30%Growth top 35%Talent top 38%News bottom 47% All 8 signals ▾Fundingtop 30% Growthtop 35% Talenttop 38% Newsbottom 47% Moatbottom 38% Techbottom 30% Globalbottom 29% Marketbottom 21% Funding: Raised $9.0M across 4 rounds · 4 rounds over 3 yrs (1.3/yr) Growth: Fresh capital in last 24 mo rank vs industry peers · Fliar Intelligence Index 37/100 | $9M | 4 mo ago | Series A | Oliver Schmitz Co-Founder | 2021 | Cart FunctionalityWooCommerceWordPress+18 | — | 1 internship · 1 launch · 1 partnership |
| 6 | Aquarius Technologies Provider of waste water and sewage treatment solutions | $8M | 237 mo ago | Acquired | — | 2006 | WordPressMySQLPHP+24 | 8 patents Advanced membrane bioreactors and aeration adapters for multi‑stage wastewater treatment | 2 job openings |
| 7 | AquaMost Developer of water treatment systems | $5M | 135 mo ago | Series A | — | 2006 | — | 37 patents Advanced photoelectrocatalytic water treatment and contaminant removal technologies. | — |
| 8 | Lakeshore Recycling Offers waste recycling services | $4M | 34 mo ago | Acquired | — | 1999 | WordPress Block EditorElementorWordPress+47 | — | — |
| 9 | Gearbox Express Operation and Maintenance provider for gearboxes | $2M | 93 mo ago | Acquired | — | 2010 | — | — | — |
| 10 | Rapid Radicals Sewer overflow and stormwater management company | $574K | 15 mo ago | Seed | Paige Peters Founder and CTO | 2010 | — | — | — |
| 11 | The Water Council Provider of water management services | $172K | 201 mo ago | Funding Raised | — | 2009 | WordPressMySQLPHP+26 | — | — |
| 12 | Kettle View Renewable Energy Provider of solar PV and wind system installation solutions for residential and commercial customers | $17K | 200 mo ago | Funding Raised | Randy Faller Owner | 2008 | — | — | — |
| 13 | A. O. Smith Provider of water heaters, boilers, and treatment products | — | 13 mo ago | Public | Arvinddd Ji Founder & Managing Director | 1874 | DrupalApple iCloud MailPHP+23 | 4,551 patents Residential and commercial water heating systems, storage tanks, and water‑softening plumbing solutions. | 1 launch · 3 awards |
Top 12 Environment companies in Wisconsin
#1
Series D · Janesville, Wisconsin · founded 2005 · 165 employees$413.6Mraised▾
Producer of nuclear isotopes using fusion techniques
- Feb 2026Series D$240M
- Oct 2024Grant (prize money)—
- Oct 2023Series C$70M
- Jul 2023Grant (prize money)$1.1M
#2
Series A · Madison, Wisconsin · founded 2021 · 5 employees$9Mraised▾
Developer of nuclear energy projects
- Feb 2026Conventional Debt$9.5M
- May 2025Series A$36M
- Dec 2024Seed—
- Jun 2023Grant (prize money)$3M
#3
Funding Raised · Pewaukee, Wisconsin · founded 2009 · 68 employees$113Mraised▾
SunVest Solar develops and installs solar PV projects on a residential and commercial scale. Claims to have installed 44k solar panels totalling to 13MW. Has a monitoring portal to monitor the installed systems. Installed a 21kW system for St. Dennis Church, a 158kW system for Madison Gas and Electric and others. Also develops community solar systems.
- Dec 2022Conventional Debt$113M
#4
Seed · Milwaukee, Wisconsin · founded 2010 · 5 employees$574Kraised▾
Developer of a decentralized, high-rate wastewater treatment technology designed to address combined sewer overflows for municipal sewerage districts. The company's fully automated technology combines rapid solids removal with a proprietary advanced oxidation process, it offers a range of applications from municipal wastewater rapid treatment to industrial high-strength wastes as well as emergency situations such as mobile or small footprint applications, enabling clients to reliably and cost-effectively manage water for a more resilient future.
- Feb 2025Grant (prize money)$174.5K
- Aug 2024Grant (prize money)$174.5K
- Jul 2019Grant (prize money)$225K
- Mar 2019Seed—
#5
Acquired · Milton, Wisconsin · founded 1998 · 875 employees$685Mraised▾
Manufacturer of superior-quality coextruded, barrier, and monolayer films. Its product line includes plastic, extruded, blown, cast films, and flexible packaging.
- Conventional Debt$685M
#6
Series B · Madison, Wisconsin · founded 2005 · 118 employees$28.8Mraised▾
Neutron radiography and imaging solutions for aerospace, defense, and industrial sectors. They provide nondestructive testing services using neutron imaging, a technique that reveals the internal structure of components without damage. This is crucial for quality assurance, failure analysis, and research and development. They offer a reliable alternative to reactor-based facilities, providing high-resolution imaging with greater flexibility and reduced overhead. Their services support manufacturers in delivering safe, high-quality products across various industries. They are certified and compliant with industry standards, including AS9100D and ITAR, ensuring quality and security. They empower reliable, agile suppliers of safe, high-performing products.
- Mar 2020Series B$999.8K
- Dec 2018Series B$15M
- Oct 2017Series A$12M
- Oct 2017Series A$1.7M
#7
Acquired · Oconomowoc, Wisconsin · founded 1999 · 2300 employees$4.5Mraised▾
Offers waste recycling services
- Aug 2023Series B$3M
- Dec 2017Series B—
- Mar 2016Series A$1.5M
#8
Series A · Madison, Wisconsin · founded 2006 · 12 employees$4.9Mraised▾
Provider of an innovative water purification technology intended to provide chemical-free water treatment services. The company's innovative water purification technology uses ultraviolet light and a patented, light-activated catalyst to destroy a wide variety of chemical and microbial contaminants in water, including benzene, MTBE, pharmaceuticals, personal care products, viruses and bacteria, enabling users to remediate the water right on site, so that it can be used again in the fracking process.
- Feb 2015Series A$168.2K
- Jan 2014Series A$1.3M
- Nov 2012Series A$620.5K
- Dec 2011Series A$1.8M
#9
Acquired · Saukville, Wisconsin · founded 2006 · 12 employees$7.5Mraised▾
Provider of waste water and sewage treatment solutions
- Sep 2006Series A$7.5M
#10
Acquired · Milwaukee, Wisconsin · founded 2010 · 37 employees$2.5Mraised▾
Gearbox Express develops down-tower, wind gearbox remanufacturing solutions. The company is a remanufacturer and GBXchange exchange inventory of gearboxes, its ancillary equipment, main shafts, and bearing. They also have a 3.1 MW regenerative test stand for simulating real world situations.
- Sep 2018Conventional Debt$5M
- Jul 2016Seed$450K
- Jul 2013Seed$200K
- Jun 2011Seed$1.8M
#11
Funding Raised · Milwaukee, Wisconsin · founded 2009 · 11 employees$172.5Kraised▾
Provider of water management services
- Sep 2009Grant (prize money)$172.5K
#12
Funding Raised · Rhinelander, Wisconsin · founded 2008$17.4Kraised▾
Kettle View Renewable Energy is a company specializing in solar PV and wind system installations for residential, commercial, and industrial customers, including schools, farms, and municipalities. The company offers expertise in renewable energy solutions and has a physical presence in Wisconsin. Kettle View Renewable Energy has ties with various industry organizations and partners.
- Sep 2009Grant (prize money)$17.4K
Funding & investor landscape
Notable founders
Market landscape — 10 sub-themes by coverage
Share of Environment coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
What Wisconsin researches in environmental monitoring
University of Wisconsin–Madison and partners lead Wisconsin's environmental-monitoring research, predominantly advancing air quality and health-impact monitoring with a cautiously optimistic tone.
- University of Wisconsin–Madison17
- University of Wisconsin–Milwaukee5
- Wisconsin Department of Natural Resources3
- Medical College of Wisconsin2
- University of Wisconsin–Extension2
Common questions
Rohit lives in the feed. He covers what's moving right now — the funding rounds, launches and shifts breaking across the trade press — and ties them back to where the sector is heading.