October 2025
2025 Sustainability Reporting In Focus
Amid Changing ESG Rules, U.S. Companies Continued to Step Up Sustainability Reporting
S&P 500® Reaches 99% Reporting; Russell 1000® Increases to 94%
Governance & Accountability Institute, Inc. (G&A) is pleased to share the 14th annual edition of our research series tracking the sustainability reporting trends of the largest U.S. publicly-traded companies. G&A’s 2025 Sustainability Reporting in Focus research on companies in the S&P 500® Index and the Russell 1000® Index shows substantial increases in sustainability reporting for both large-cap and mid-cap U.S. public companies, as the mandated disclosure requirements for U.S. companies beginning in 2026 in the EU and California.
Key Findings
A record 94% of Russell 1000 companies reported on sustainability in 2024, up from 93% in 2023.
The smaller half by market cap of the Russell 1000 (mid-cap companies with approximately $2 billion-$4 billion in market cap) had the greatest alignment in reporting in 2024 – reaching 90% compared to 87% in 2023.
The larger half by market cap of the Russell 1000 (i.e., the S&P 500) are nearing 100% reporters with a record 99% reporting on sustainability in 2024, compared to 98.6% in 2023.
SASB continued to be the most widely used sustainability standard, with 82% of Russell 1000 reporters aligning with SASB in 2024, compared to 81% in 2023 and only 12% in 2019.
TCFD reporting continued to increase, with 65% of Russell 1000 reporters aligning with TCFD in 2024, compared to 60% in 2023 and only 4% in 2019.
GRI reporters remained consistent among the Russell 1000 with 55% aligning with GRI in 2024 – the same compared to 2023.
Summary
This year’s findings reinforce that sustainability reporting has become a near-universal practice among the largest U.S. public companies. As global reporting requirements expand—particularly under the EU’s CSRD and California’s climate disclosure laws—both large-cap and mid-cap firms are increasing the quality, coverage, and alignment of their ESG disclosures. The inclusion of new frameworks such as ISSB, ESRS, and TNFD signals a significant broadening of the reporting landscape, highlighting a convergence of global standards toward a more consistent and comparable sustainability reporting ecosystem.
What You’ll Learn
The 2025 edition of Sustainability Reporting in Focus provides an in-depth look at the record-setting rise in corporate sustainability reporting and the frameworks shaping the future of ESG disclosure. Readers will learn how reporting practices vary by sector, how alignment with leading standards such as SASB, GRI, and TCFD has evolved, and how emerging frameworks like ISSB, ESRS, and TNFD are influencing corporate transparency. The report also offers valuable insights into how U.S. companies are preparing for the upcoming wave of mandatory disclosure requirements and what these developments mean for the future of sustainability reporting.
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