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Sustainability and ESG Resource Center

Simpson Thacher’s ESG group takes a proactive, holistic and solutions-based approach to helping clients navigate mounting legal risks and regulatory requirements across the ever-shifting ESG landscape. We support our private equity, financial institution and public and private company clients beyond their day-to-day needs by publishing regular alerts, updates and communications, including a monthly sustainability and ESG regulatory update, compiling a global regulatory database to facilitate compliance with applicable legal and regulatory frameworks, and maintaining a 50-state tracking tool covering key pro- and anti-ESG measures.

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ESG Battlegrounds

How the States Are Shaping the Regulatory Landscape in the U.S.
Updated as of February 2025

This alert details developments in U.S. ESG regulation, particularly as individual states have stepped up their lawmaking through drastically different approaches. It further explores these approaches to ESG-focused legislation and offers high-level takeaways on ESG investing and contracting on the state level.

Download the Full Alert >

Download an Overview of ESG State Laws and Policies >

Regulatory Update

This monthly update includes the most significant developments regarding ESG-related laws, regulations, litigation and initiatives during the previous 30 days.


Recent Developments

01.24.25
Implications of President Trump’s Early Executive Orders on DEI

01.13.25
Texas District Court Finds ESG Elements of American Airlines’ 401(k) Plans Violate ERISA Fiduciary Duties

01.09.25
Business and Human Rights Regulation: Where Are We Headed?

12.13.24
Fifth Circuit Vacates SEC’s Approval of Nasdaq Board Diversity Rules

10.29.24
Voluntary Carbon Market Disclosure Requirements Are Coming: What Companies Need to Know About California’s AB 1305

09.30.24
Preparing for California’s Climate Disclosure Laws

09.25.24
Sustainability and ESG: Where Are We Now? Taking Stock of the Latest Legal Developments

07.16.24
CSDDD—EU Delivers Mandatory Sustainability Due Diligence Regime Despite Political Pressure

07.01.24
ESG Litigation: What the Supreme Court’s Loper Bright Decision Means for ESG, and Other Key Trends

06.06.24
DEI Developments: 11th Circuit Blocks the Fearless Fund’s Grant Program for Black Female-Owned Businesses

03.07.24
SEC Finalizes Landmark Climate-Related Disclosure Rules

02.23.24
CSDDD Hangs in the Balance – What’s at Stake?

02.02.24
UPDATED: ESG Battlegrounds: How the States Are Shaping the Regulatory Landscape in the U.S.

12.14.23
Seven Key Trends in ESG for 2023—and What to Expect in 2024

10.31.23
California’s Flurry of ESG Lawmaking

10.24.23
EU Lawmakers Approve European Green Bond Regulation 

10.04.23
EU Corporate Sustainability Reporting Directive (CSRD): 5 Key Considerations for U.S. Companies

09.15.23
California Legislature Passes Far-Reaching Climate Disclosure Bills

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