Best Environment Companies in Maryland, United States
The 108 best Environment companies in Maryland, United States in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: X Energy.
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 Maryland
| # | Company | Disclosed funding | Last round | Employees | Founder | Tech stack | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|
| 1 | X Energy Developer of small modular & high temperature gas cooled nuclear reactor 84Patents top 11%Funding top 14%Product top 14%Growth top 17% All 11 signals ▾Patentstop 11% Fundingtop 14% Producttop 14% Growthtop 17% Innovationtop 20% Moattop 32% Techtop 36% Talenttop 38% Markettop 45% Globalbottom 49% Newsbottom 22% Patents: 1,201 patents matched (strict assignee match) · 615 filings since 2022 vs 342 in 2017-21 Funding: Raised $605M across 11 rounds · 11 rounds over 10 yrs (1.1/yr) rank vs industry peers · Fliar Intelligence Index 84/100 | $605M | 6 mo ago | 246 | Kam Ghaffarian Founder | DrupalPHPAmazon Web Services+25 | 1,201 patents Oil & gas extraction and processing, hydraulic fracturing equipment, and uranium recovery power systems | — |
| 2 | Centrus Energy Supplier of uranium fuel | $402M | 19 mo ago | 63 | Daniel Poneman CEO & President | WordPressMySQLMariaDB+21 | — | 1 job opening · 3 partnerships · 2 expansions |
| 3 | Competitive Power Ventures Develops and operates wind assets | $341M | 54 mo ago | 83 | — | WordPress Block EditorWordPressMySQL+24 | — | — |
| 4 | Direct Energy Solar Residential solar installation service provider | $111M | 143 mo ago | 82 | Joshua Goldberg Co-Founder | — | — | — |
| 5 | USALCO Provider of alumina based chemical solutions for water treatment and industrial applications | $37M | 72 mo ago | 190 190 → 267 (+41%) | — | WebflowApple iCloud MailSalesforce+20 | 69 patents Advanced aluminum-based water treatment coagulants and production processes | 1 job opening · 1 partnership |
| 6 | SolarWindow Technologies Developing transparent electricity-generating coatings for glass and plastics | $36M | 90 mo ago | 3 | Jatinder Bhogal Chief Executive Officer | WordPressSentryMySQL+36 | — | — |
| 7 | Renewable Energy Residential solar panel installer | $25M | 105 mo ago | — | Reidar Langmo Founder (ScanWafer) | WordPressMySQLPHP+31 | — | — |
| 8 | Sunstone Credit Developer of solar & wind energy projects | $24M | 40 mo ago | 13 13 → 29 (+123%) | Sumbul Alvi Co-Founder | — | — | — |
| 9 | Standard Solar Scaling renewables through development, funding, ownership, and operation of solar projects | $12M | 179 mo ago | 121 | — | WordPressApple iCloud MailMicrosoft 365+31 | — | — |
| 10 | Newport Partners Provider of consulting services for energy efficient green buildings | $9M | 8 mo ago | 9 | — | — | — | — |
| 11 | Sunlogics Solar panel manufacturer and project developer | $8M | 178 mo ago | — | Satpal Sidhu CEO & President | — | — | — |
| 12 | National Fenestration Rating Council Organization certifies energy performance ratings for windows, doors, and skylights | $6M | 176 mo ago | 26 | — | WordPressMySQLPHP+18 | — | — |
| 13 | Red Bag Solutions Provider of bio-hazardous waste management services | $5M | 178 mo ago | 13 | Don Millard President and CEO | — | — | — |
| 14 | TVIG Developer of wind energy projects | $4M | 178 mo ago | — | Peter De Vos chairman & ceo | — | — | — |
| 15 | Neighborhood Sun Community solar program developers | $3M | 36 mo ago | 37 | — | WordPressMySQLPHP+32 | — | 2 partnerships |
| 16 | Sunairio Developer of wind and solar energy projects | $2M | 18 mo ago | 7 | — | — | — | 1 launch |
| 17 | Planet Found Energy Development Manufacturer and supplier of biogas plant to convert poultry litter to electricity and heat | $1M | 82 mo ago | 4 | — | — | — | — |
| 18 | PaverGuide Provides installation services for permeable pavement reservoir | $825K | 86 mo ago | 1 | Charles White Founder & CEO | — | 8 patents Advanced permeable pavement media for phosphorus‑nitrogen removal in contaminated water | — |
| 19 | Antares Group Developer of solar and wind energy projects | $772K | 71 mo ago | 17 | — | — | — | — |
| 20 | Viskon-Aire Manufacturer of disposable air filtration products | $412K | 197 mo ago | 17 | — | — | — | — |
| 21 | Alpha Energy Developers of community scale renewable energy projects | $378K | 170 mo ago | 6 | David Murrin Chairman and Co-Founder | — | — | — |
| 22 | Bahari Energy Innovating wind energy solutions for distributed generation in urban environments | $160K | 129 mo ago | 4 | — | — | — | — |
| 23 | CTRL Systems Manufacturer of acoustic ultrasound technology for condition-based monitoring. | $150K | 52 mo ago | 3 | Robert Roche Founder & CEO | Wix eCommerceWixSentry+17 | — | — |
| 24 | CleanBay Provider of poultry waste treatment and recycling services | $100K | 54 mo ago | 14 | Thomas Spangler Executive Chairman and Founder | — | — | — |
| 25 | Altenera Harness energy using vibrating reeds | $100K | 155 mo ago | — | Morris Kaplan Founder & CTO | — | — | — |
| 26 | US Wind Developer of offshore wind projects | — | 70 mo ago | 15 | — | WordPressMySQLPHP+16 | — | — |
| 27 | GSE Systems Simulation tools for nuclear power plants | — | 97 mo ago | 278 278 → 411 (+48%) | Kyle Loudermilk Chief Executive Officer | WordPressMySQLPHP+26 | — | 3 partnerships |
Top 12 Environment companies in Maryland
#1
Public · Greenbelt, Maryland · founded 2010 · 246 employees$605Mraised▾
Developer of small modular & high temperature gas cooled nuclear reactor. It operates through tri-structural isotropic particle fuel. And also offers pebble bed nuclear reactor, zero emission energy, neutronics, and nuclear engineering services.
- Nov 2025Series D$700M
- Jun 2025Series C$22.8M
- Mar 2025PE—
- Feb 2025Series C$200M
#2
Public · Bethesda, Maryland · founded 1998 · 63 employees$402.5Mraised▾
Supplier of uranium fuel. The company supplies uranium fuel for commercial nuclear power plants and claims to have provided for its utility customers. They are also providers of advanced engineering services and claim to reduce the time, costs, and risks of developing and manufacturing complex engineered products.
- Nov 2024Post IPO$402.5M
- Dec 2010Grant (prize money)—
#3
Funding Raised · Davidsonville, Maryland · founded 2002 · 9 employees$8.8Mraised▾
Provider of consulting services for energy efficient green buildings
- Oct 2025Grant (prize money)$2.6M
- May 2025Grant (prize money)$423K
- May 2025Grant (prize money)$2.6M
- Mar 2025Grant (prize money)$491.1K
#4
Series A · Baltimore, Maryland · founded 2020 · 7 employees$1.8Mraised▾
Developer of wind and solar energy projects
- Dec 2024Series A$6.4M
- Mar 2024Grant (prize money)$275K
- May 2022Seed$1.8M
#5
Acquired · Silver Spring, Maryland · founded 1999 · 83 employees$341Mraised▾
Competitive Power Ventures is an electric power generation, development and asset management company. CPV a development arm of the company develops different wind portfolios across North America. The company's asset management division has operated more than 8,000 MWs of generation since 2001 and currently has 6,100 MWs under management. The company is headquartered in Silver Spring, Maryland, with offices in Braintree, Massachusetts, San Francisco, California, and Ontario, Canada.
- Dec 2021PE—
- May 2015PE—
- Aug 2014Conventional Debt$550M
- Sep 2013Conventional Debt$842M
#6
Series A · Baltimore, Maryland · founded 2021 · 13 employees$24.5Mraised▾
Developer of solar & wind energy projects
- Jan 2023Series A$20M
- Feb 2022Seed$4.5M
- Series A—
#7
Series B · Annapolis, Maryland · founded 2008 · 82 employees$110.5Mraised▾
Direct Energy Solar offers solar installation services mainly in the residential space. 'Direct Energy' acquired Astrum Solar for $54m in July 2014 and renamed the company as 'Direct Energy Solar'. The company received a $500k grant form Howdy County in April 2015. Astrum Solar was founded in 2008 by Vadim Polikov, Joshua Goldberg & Benjamin Davis.
- Jul 2014PE$100M
- Nov 2013Series B$7.5M
- May 2011Series A$3M
#8
Acquired · Columbia, Maryland · founded 2003 · 3 employees$35.6Mraised▾
Developing transparent electricity-generating coatings for glass and plastics. The company focuses on creating innovative products that generate clean electricity and reward customers while benefiting the environment. Their core technology involves applying ultra-thin coatings to glass and plastic surfaces, transforming them into electricity-generating photovoltaic devices. This technology has applications in architecture, automotive, agrivoltaics, and transportation. The company aims to outperform traditional rooftop solar solutions by utilizing abundant materials and a liquid coating process suitable for high-speed production. The technology works in natural, shaded, low-light, and indoor light conditions. The company's team includes experts in business leadership, science, research, and engineering, with expertise in solar photovoltaics, manufacturing methods, reliability testing, and durability. The company is involved in B2B and B2C business model, and it is a tech company.
- Nov 2018Post IPO$25M
- Oct 2017Post IPO$2.6M
- Jun 2016Post IPO$3M
- Mar 2016Post IPO$1.4M
#9
Series A · Silver Spring, Maryland · founded 2016 · 37 employees$2.5Mraised▾
Neighborhood Sun is a social enterprise that develops community solar systems for providing cost-effective solar power to communities. The company handles the entire engineering, procurement, development, and maintenance of the solar power plants and handles customer acquisition as well.
- May 2023Series A$1.5M
- Jan 2022Conventional Debt$1.3M
- Mar 2020Series A$350K
- Aug 2018Series A$275K
#10
Late Stage · Baltimore, Maryland · founded 1979 · 190 employees$37Mraised▾
Provider of alumina based chemical solutions for water treatment and industrial applications
#11
Series B · Lutherville Timonium, Maryland · founded 2009$25Mraised▾
Residential solar panel installer
- Sep 2017Series B$25M
#12
Acquired · Rockville, Maryland · founded 2004 · 121 employees$12Mraised▾
Scaling renewables through development, funding, ownership, and operation of solar projects. The company is a nationally recognized leader dedicated to expanding renewable energy access. They develop, deliver, fund, and operate commercial and community solar projects. Their integrated approach leverages technical expertise as a developer, EPC, long-term asset owner-operator, and funding source. They offer development and EPC consulting, long-term asset ownership, funding, and community solar services. They focus on reducing complexities through collaborative development, in-house funding, and engineering expertise. They serve various sectors, including commercial, community, education, public sector, and utilities. The company pioneers progress by breaking down barriers to development and expanding access to renewable energy. They offer solar project development, long-term owner-operator services, funding, asset management, and community solar services.
- Jun 2011Series A$2.6M
- Oct 2008Series A$8.5M
- Mar 2008Series A$3.5M
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 Maryland researches in environmental monitoring
University of Maryland institutions dominate Maryland's environmental-monitoring research, focusing on air quality and atmospheric chemistry with a cautiously optimistic yet contested tone (mean stance 0.26).
- University of Maryland, College Park13
- University of Maryland Center for Environmental Science6
- University of Maryland, Baltimore County5
- Maryland Department of Natural Resources1
- Virginia–Maryland College of Veterinary Medicine1
Common questions
Riya reads income statements for fun. She covers the real money in a sector — revenue, growth, who actually earns — and never met a vague claim she didn't want a number for.