Why Boards Are Now Being Judged on ESG Oversight?

In a survey of nearly 300 corporate leaders conducted between February and April 2026, governance overtook environmental issues as the top perceived reputational risk to business, cited by 45% of respondents compared with 29% two years earlier.

The shift arrives as regulators and investors stop asking whether a board oversees ESG and start asking how. The SEC's climate disclosure rules now require companies to name which board committee holds climate oversight and how climate risk feeds into material decisions. ISS and Glass Lewis have both tightened their ESG governance evaluation criteria for the 2026 proxy season, and BlackRock, Vanguard and State Street escalated votes against directors over inadequate ESG oversight through 2025.

Boards are no longer judged on whether they have a sustainability strategy. They are judged on whether their oversight structure can withstand the same scrutiny applied to financial controls, and most cannot yet meet that bar.

This shift did not happen quickly. It followed several years in which boards responded to sustainability pressure primarily through disclosure: publishing ESG reports, forming committees, adopting climate targets. That response satisfied an earlier stage of scrutiny, in which the main question was whether a company was paying attention to ESG issues at all.

Two forces have since raised the bar. First, mandatory sustainability reporting has replaced voluntary disclosure across major markets, from the EU's Corporate Sustainability Reporting Directive to California's SB 253, whose first Scope 1 and 2 reporting phase begins in 2026 for companies with over a billion dollars in revenue doing business in the state. Mandatory regimes create legal accountability for accuracy that voluntary reports never carried.

Second, the same period has seen more than 100 anti-ESG bills introduced at the US state level, alongside a December 2025 executive order directing federal agencies to scrutinise proxy advisors, creating a governance environment where doing too little and doing too much both carry reputational risk. Boards operating in this environment can no longer rely on the appearance of oversight. They need oversight structures that can be defended under examination, whether that examination comes from a regulator, an activist investor, or a plaintiff's attorney.

The standard boards are now held to has moved from whether ESG appears on the agenda to whether the board's oversight of it could survive independent scrutiny, and the widening gap between claimed and actual expertise suggests most boards have not yet made that adjustment.

Financial performance was never going to be enough on its own, not because ESG has become a parallel priority, but because inadequate oversight of any material risk is now treated, correctly, as a governance failure in its own right.