America’s Greenest Companies 2027 Methodology Overview

America’s Greenest Companies 2027 recognizes the top 650 U.S. companies for their performance in environmental sustainability. The ranking was developed by Newsweek and Plant-A Insights Group in partnership with GIST Impact, using publicly available sustainability data from both public and private companies.

More than 6,000 companies were included in the review. To be considered, companies were required to maintain a U.S. headquarters and have publicly disclosed sustainability data available as of June 30, 2026. Companies were also screened according to the European Union (EU) Benchmark exclusion criteria, which exclude businesses with significant involvement in activities such as controversial weapons, tobacco, nuclear weapons and energy, coal, oil and gas, and highly carbon-intensive electricity generation. 

Each eligible company was evaluated across more than 25 sustainability parameters organized into four key categories: 

  • Greenhouse Gas (GHG) Emissions 
  • Water Usage 
  • Waste Generation 
  • Commitment & Disclosure 

To ensure a fair comparison regardless of company size, absolute environmental data was first divided by revenue to calculate intensity metrics. Companies were then scored for each parameter based on their percentile position relative to all other evaluated organizations. If a company did not disclose data for a specific metric, it automatically received a score of zero. These individual scores were then combined to calculate the overall category results and determine the final ranking.

The media monitoring platform Critical Mention by Onclusive was utilized to identify whether companies were implicated in environmental wrongdoing, greenwashing or serious ecological misconduct between August 31, 2024, and August 31, 2026. Any company found engaging in these practices was subsequently excluded from the final America’s Greenest Companies 2027 ranking list. Newsweek and Plant-A Insights Group conducted multiple iterations of the media monitoring process to validate all exclusions and ensure the accuracy of the results.

The 650 highest-scoring eligible companies were recognized by Newsweek and Plant-A Insights Group as America’s Greenest Companies 2027.

The exclusion of a company from this list is not a reflection of its performance and is not disputed.

Plant-A Insights Group has a strict no-pay-to-play policy. All awards are based on independent research and unbiased data analysis. No applications.

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Project Disclaimer

Rankings Placement

Placement in the Rankings (defined below) is a positive recognition based on research of publicly available data sources from the time period in question.

Intellectual Property Rights

All content within the rankings (“Rankings”) is the exclusive property of Plant-A Insights Group LLC (“Plant-A”). This work, including all data, analyses, and derived rankings, is copyrighted under United States and international copyright laws. Unauthorized use, including but not limited to the publication, reproduction, modification, distribution, transmission, or display of any material without the prior written consent of Plant-A, is strictly prohibited.

Nature of the Rankings

The Rankings are prepared by Plant-A and reflect an editorial content piece, based on both primary and secondary market research. This includes publicly available data and specific data provided directly to Plant-A. These Rankings are published in conjunction with Newsweek and should be viewed as an editorial work, not as definitive financial or business guidance.

Data Accuracy and Periodicity

The Rankings are generated from data sources deemed reliable and are formed based on a methodological analysis of such data spanning the last 24 months. They are inherently a reflection of historical data and may not include subsequent developments, unforeseen events, or additional data not covered during the research period.

No Endorsement or Quality Assurance

Plant-A, Newsweek and GIST Advisory Switzerland S.A. (“GIST Impact”) do not endorse nor validate the business practices or the standing of the ranked companies. The inclusion or exclusion of any company in the Rankings should not be used as a basis for investment, business, or other decisions. All decisions based on any information presented in the Rankings should be made in conjunction with other available information and independent advice.

Disclaimer of Liability

Plant-A, its subsidiaries, and their respective officers, directors, employees, and agents (collectively, the “Plant-A Parties”) disclaim all liability and responsibility for any errors or omissions in the Rankings or for any actions taken based on the contents of this publication. Neither Plant-A nor Newsweek nor GIST Impact guarantees the completeness or accuracy of the information contained in the Rankings.

By accessing, using, or relying upon the Rankings, you waive all claims and have no recourse against Plant-A Parties for any alleged or actual infringements of any rights of any party, including privacy rights, proprietary rights, intellectual property rights, rights of publicity, rights of credit for material or ideas, or any other rights, including the right to approval of uses such as copy that may be deemed to be distorted, derogatory, or offensive.

This disclaimer is intended to be as broad and inclusive as permitted under the law. If any portion hereof is held invalid or unenforceable, the remainder of the disclaimer shall nonetheless remain in full force and effect. This disclaimer constitutes the entire agreement between you and Plant-A regarding the use of the Rankings.

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America’s Greenest Companies 2025

Plant-A Insights Group and GIST IMPACT have partnered with Newsweek to determine America’s Greenest Companies 2025. “America’s Greenest Companies 2025” recognizes the top 500 companies for their advancements in managing their sustainability footprint. The ranking of America’s Greenest Companies recognizes the top 500 companies in the USA based on environmental sustainability. The list is derived from research and analysis of public data of organizations (both public and private) in the USA, that meet the minimum standards set by the European Union, widely regarded as the most advanced set of standards globally). Only companies with publicly disclosed sustainability data as of July 31, 2024, were considered.
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