A lawsuit filed by shareholder advocate As You Sow against insurer Chubb is fast becoming a defining test of shareholder rights in the US proxy system, highlighting how climate governance disputes are shifting from regulators to the courts.
Filed in March 2026 in federal court in Washington DC, the case challenges Chubb’s decision to exclude a shareholder proposal from its AGM. The proposal asked investors to vote on whether the company should commission a report examining the potential to recover climate-related losses from responsible third parties, including fossil fuel producers
On one level, the dispute is technical, focused on the interpretation of Rule 14a-8 under the Securities Exchange Act. Chubb argued that the proposal could be excluded under the ‘ordinary business’ exemption, a long-standing basis for omitting shareholder resolutions.
However, the broader governance implications are far more significant. As You Sow’s central argument is that the proposal addresses a ‘significant policy issue’ that goes beyond day-to-day operations and directly affects the company’s long-term financial sustainability. The group points to the growing strain on the US homeowner insurance market, where climate-related losses are increasing in frequency and severity, driving up premiums and reducing availability of coverage.
The proposal itself is notable for its focus on subrogation, a standard insurance practice that allows companies to recover costs from responsible parties. In this case, the question is whether insurers should apply that principle to climate change, potentially seeking compensation from high-emitting companies to offset mounting losses.
For governance professionals, the case raises a fundamental question: when does a shareholder proposal cross the line from operational interference into legitimate oversight of strategy and risk?
The legal framing of the lawsuit makes that tension explicit. As You Sow is seeking a court order requiring Chubb to include the proposal in its proxy materials, arguing that excluding it violates federal securities law. The complaint also reflects a wider concern among investors that companies are using procedural arguments to avoid votes on contentious ESG topics.
‘Homeowners are not responsible for the climate crisis, yet they are the ones bearing the cost,’ said Danielle Fugere, president and chief counsel of As You Sow. ‘Insurance companies are raising rates and dropping coverage because of climate-related disasters, but the parties most responsible – the major fossil fuel producers – are not being held accountable.
‘Our proposal simply asks Chubb to evaluate whether recovering costs from responsible parties could help keep insurance affordable for the families and communities that depend on it.’
The case also goes to the heart of shareholder democracy. Nicolas Sansone, an attorney representing the group, said: ‘This case also implicates the right of a company’s shareholders to have their voices heard on matters of great significance to long-term corporate strategy.’
What makes this dispute particularly important is the timing: it comes in the wake of the SEC’s decision in late 2025 to scale back its role in reviewing no-action requests. That change has effectively removed the primary administrative mechanism for resolving disagreements over proposal exclusions, forcing investors to turn to litigation instead.
The Chubb lawsuit is part of a growing wave of cases, alongside disputes involving companies such as AT&T and Axon, where shareholders have challenged exclusion decisions in court. In some instances, companies have reversed course and agreed to include proposals rather than face prolonged legal battles.
For boards, this shift introduces a new layer of risk. Excluding a proposal is no longer just a procedural judgment, but becomes a decision that may need to be defended before a judge. This raises the stakes for internal governance processes, particularly around how companies assess materiality and document their reasoning.
The Chubb case also underscores the growing importance of climate risk within core governance frameworks. The proposal links climate change directly to financial performance, underwriting strategy and long-term market stability. By framing the issue in terms of cost recovery and insurance affordability, it moves beyond disclosure into the realm of strategic decision-making.
At the same time, companies remain wary of opening the door to shareholder influence over complex operational questions. Determining whether to pursue subrogation claims against fossil fuel producers would involve legal, financial and reputational considerations that boards may view as squarely within their remit.
This tension is unlikely to be resolved quickly. Court decisions may provide some clarity, but they could also produce inconsistent outcomes, particularly if different jurisdictions interpret the rules differently.
In the near term, the more immediate impact may be behavioral. Faced with the prospect of litigation, some companies may choose to include borderline proposals rather than exclude them. Others may invest more heavily in shareholder engagement to defuse potential conflicts before they escalate.
Ultimately, the As You Sow and Chubb case is not just about a single climate proposal. It is a test of how far shareholders can push boards on emerging systemic risks, and how companies respond when regulatory guardrails are removed.
As the proxy system adapts to this new reality, one thing is becoming clear: the question of who controls the corporate ballot in the US is no longer being settled in Washington, but in the courts.