Top St. Louis, MO Greentech Companies (10)

We're Ameren Corporation (AEE), a St. Louis-based, Fortune 500 company that powers the quality of life for millions of people throughout Illinois and Missouri. Ameren Illinois provides electric distribution and transmission service, as well as natural gas distribution service, while Ameren Missouri provides vertically integrated electric service, with generating capacity of over 10,200 megawatts, and natural gas distribution service. Combined,...

Filtration Group is on a mission to make the world safer, healthier and more productive. With a passionate workforce, global footprint and world class engineering and manufacturing capabilities, we are driving innovation and developing solutions across a broad spectrum of applications in the fast-growing global filtration industry.

TruGreen is the nation's largest lawn care company, providing services such as lawn, tree, and shrub care, as well as mosquito and pest control, focusing on science-based solutions for healthy lawns.

We are a global climate technologies company engineered for sustainability. Today, we are building on our 100-year legacy through industry-leading innovation, putting Copeland at the forefront of positive change. We create sustainable residential, commercial and industrial spaces through HVACR technologies. We maintain the integrity of goods throughout the cold chain. And we bring comfort to people globally.

Redefining Water Infrastructure Modeling and Asset Management through Machine Learning

HDR is an employee-owned design firm specializing in engineering, architecture, environmental and construction services. We’re ranked No. 6 among the world’s design firms and we’re the largest healthcare design firm. Led by the strength of our values and a culture shaped by employee ownership, we network with each other, build on each other’s contributions, and collaborate together to make great...

dClimate is a decentralized climate data marketplace and network designed to standardize, monetize, and distribute climate data, forecasts, and models. Its mission is to build an essential, immutable 'truth layer' for the Earth's climate record on the blockchain, empowering businesses, governments, and individuals to access reliable data to assess risks, monitor natural capital, and build lasting climate resilience.

US Ecology, Inc. is a leading North American provider of environmental services to commercial and government entities. The Company addresses the complex waste management needs of its customers, offering treatment, disposal and recycling of hazardous and radioactive waste, as well as a wide range of complementary field and industrial services. US Ecology’s focus on safety, environmental compliance, and customer service,...

From Upstream, Downstream, Utilities, and Engineered Services, HydroChemPSC has the broadest industrial service line in the industry, bar none.

Progressive Recovery, Inc. (PRI) specializes in the design and manufacture of innovative clean-technology systems, including closed-loop solvent recycling, biowaste sterilization, and industrial filtration. Serving sectors such as pharmaceuticals, printing, and oil and gas, the company focuses on safeguarding the environment and maximizing operational efficiency through its expertise in process management and custom fabrication.