Graydon Sommer PLLC

Graydon Sommer PLLC is a boutique civil litigation firm focused on high-stakes matters that affect lives, industries, and ecosystems. We serve individuals, whistleblowers, founders, and communities navigating systemic legal challenges — from corporate misconduct and environmental harm to financial wrongdoing and civil rights violations. Our mission is to pursue justice where it’s most urgently needed by challenging powerful interests and contributing to a more sustainable and equitable future. We focus on matters where strategic litigation may help drive meaningful legal or societal outcomes for people and the planet. Whether supporting whistleblower actions under the False Claims Act, addressing anticompetitive conduct, engaging in climate-related litigation, or advising on data rights in an AI-driven world, we approach complex legal challenges with thoughtful analysis and purpose-driven advocacy. With deep respect for our clients' courage and goals, our approach to litigation is intentional — selective in our cases, precise in our strategies, and focused on outcomes that contribute to broader accountability and lasting impact. Core Practice Areas: • Whistleblower and False Claims Act (FCA) litigation • Environmental and climate-related litigation • Securities fraud and complex financial disputes • Civil rights and disability justice under federal and state law • Sexual abuse litigation with a focus on institutional accountability • ESG litigation and corporate misconduct • AI risk, data privacy breaches, and antitrust violations • High-stakes and socially significant class actions Based in Boston, we represent clients across Massachusetts.