The SEC's Final Rule: A Guide to Mandatory Climate Disclosures, Materiality Filters, and the Future of US ESG Reporting

For two years, the U.S. corporate world braced for a seismic shift in environmental reporting. In March 2024, the Securities and Exchange Commission adopted a landmark rule requiring public companies to disclose their greenhouse gas emissions and climate-related financial risks. It was hailed as the dawn of standardized ESG (Environmental, Social, and Governance) reporting in the United States. Today, that framework is effectively dead. On May 29, 2026, the SEC formally proposed to rescind the rule in its entirety, capping off a turbulent legal saga and signaling a profound pivot in federal regulatory philosophy.[1][2]

The reversal leaves corporate compliance officers and investors navigating a complex new reality. The SEC's retreat does not mean climate reporting is vanishing; rather, the regulatory center of gravity is fracturing. With the federal government stepping back, a patchwork of state-level mandates—led by California—and strict international directives are rushing in to fill the vacuum. For multinational corporations, the compliance burden has not disappeared; it has simply decentralized.

To understand the future of U.S. ESG reporting, one must look at how the SEC's ambitious mandate unraveled. Almost immediately after the rule's 2024 adoption, it faced a barrage of lawsuits from industry groups and Republican-led states. They argued the agency had vastly exceeded its statutory authority by forcing companies to disclose non-financial environmental data. In April 2024, the SEC voluntarily stayed the rule. By March 2025, the agency withdrew its legal defense entirely, leaving the mandate in indefinite limbo before the Eighth Circuit Court of Appeals.[2]

The final blow came in late May 2026, when the SEC—now under the leadership of Chairman Paul Atkins—issued a formal proposal to wipe the rule from the books. The agency cited "independent, compelling reasons" to abandon the mandate, arguing that a prescriptive, one-size-fits-all climate reporting framework is unnecessary and legally perilous. The 60-day public comment period for the rescission ends on August 3, 2026, after which a final vote is expected to officially bury the regulation.[1][2]

Had it survived, the SEC rule would have fundamentally altered corporate disclosures. It mandated that large accelerated filers report their Scope 1 (direct) and Scope 2 (indirect from purchased energy) greenhouse gas emissions. It also required companies to detail climate-related risks in their financial statement footnotes, specifically triggering disclosure if severe weather events caused losses exceeding 1 percent of pretax income. These granular requirements were designed to give investors comparable, standardized data across all public equities.[1][2]

Instead, the SEC is returning to a strict "materiality filter." Materiality is the bedrock principle of U.S. securities law, dictating that companies only need to disclose information if there is a substantial likelihood that a reasonable investor would consider it important when making an investment decision. Under the current SEC's interpretation, climate risks only warrant disclosure if they pose a direct, quantifiable threat to a company's financial bottom line, relying on older guidance issued in 2010 rather than a new prescriptive checklist.[1]

Industry groups have largely cheered the pivot. The Retail Industry Leaders Association (RILA) and the U.S. Chamber of Commerce argue that the rescission gives businesses the flexibility to focus on genuine operational risks rather than generating "regulatory noise." By stripping away the mandatory emissions reporting, companies avoid the massive compliance costs associated with auditing and verifying carbon footprints for federal filings.

However, the death of the SEC rule does not mean companies can dismantle their climate-data infrastructure. Legal experts and compliance advisors warn that a fragmented landscape is often more difficult to navigate than a unified federal standard. While the SEC steps back, individual states are aggressively stepping forward, effectively becoming the de facto climate regulators for the American economy.

California is the undisputed heavyweight in this new era. In 2023, the state passed the Climate Corporate Data Accountability Act (SB 253), which applies to any public or private company doing business in California with annual revenues exceeding $1 billion. Unlike the SEC rule, which only applied to publicly traded companies, California's net captures a vast swath of the private sector. The law requires comprehensive Scope 1 and Scope 2 emissions reporting, and state regulators have held firm on the implementation timeline.

The first major compliance deadline for California's SB 253 is rapidly approaching on August 10, 2026. Companies must submit their emissions data to a state-contracted reporting organization. Because of California's massive market size, the law effectively functions as a national standard; very few billion-dollar enterprises can afford to simply stop doing business in the state to avoid the mandate.

California's companion law, SB 261, focuses on climate-related financial risk reporting for companies with over $500 million in revenue. While SB 253 is moving forward, SB 261 is currently stayed pending an appeal before the Ninth Circuit Court of Appeals. This split status forces corporate legal teams to maintain a state of constant readiness, preparing risk disclosures while waiting for judicial clarity. Meanwhile, states like New York, Illinois, and Colorado are advancing their own similar legislative packages.

Beyond state borders, U.S. multinationals face an even stricter regime in Europe. The European Union's Corporate Sustainability Reporting Directive (CSRD) is already in effect, featuring broad extraterritorial reach. The CSRD requires companies to report on a concept known as "double materiality"—meaning they must disclose not only how climate change impacts their business financially, but also how their business operations impact the environment and society at large.

For a U.S. company with significant European operations, the SEC's rescission offers little practical relief. The data architecture required to satisfy the EU's CSRD and California's SB 253 is largely the same as what the SEC would have demanded. Consequently, law firms like Duane Morris are advising clients not to pause their implementation work. The internal controls, data owners, and assurance-readiness protocols developed over the last two years remain essential for surviving the global regulatory web.

Ultimately, the future of U.S. ESG reporting is defined by decentralization. The dream of a single, standardized federal climate filing has been replaced by a complex matrix of state laws, international directives, and voluntary investor frameworks like the International Sustainability Standards Board (ISSB). Companies will still disclose their climate risks and emissions, but they will do so to satisfy Sacramento and Brussels, rather than Washington.[3]