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Keller Postman LLC


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Keller Postman is a leading complex litigation firm for plaintiffs, specializing in mass actions. We represent clients in class actions, mass torts, and mass arbitrations, at the trial and appellate levels, in federal and state courts.

Our Mission

To aggressively pursue our clients’ claims, en masse, against the entities that have harmed them by driving innovation in the practice of law, devising cutting-edge strategies that don’t follow the standard playbook, conceiving novel arguments, and pursuing unparalleled excellence in everything we do.

Our Approach

Serving hundreds of thousands of clients in litigation and arbitration, Keller Postman has prosecuted high-profile antitrust, privacy, product-liability, employment, and consumer-rights cases and secured substantial settlements for our clients. Our firm also acts as plaintiffs’ counsel in high-stakes public-enforcement actions.Keller Postman seeks out complicated cases and takes on groundbreaking legal challenges where our legal and strategic counsel can add significant value. Our innovative approach combines high-end legal expertise with best practices in business operations and technology to deliver superlative representation for plaintiffs.Our greatest asset is our team of smart, dedicated professionals. Keller Postman lawyers honed their skills at AmLaw 100 law firms, national trial boutiques, corporate in-house legal departments, prestigious government posts, and successful business startups. Every member of our team shares a commitment to client service and a spirit of determination, dedication, creativity, and excellence.

Our Team

Keller Postman is home to one of the most exceptional teams representing plaintiffs in the United States. We’re powered by a talented team with top-notch credentials and real-world experience. Our lawyers have litigated “bet the company” cases for plaintiffs and defendants, studied and taught at some of the top law schools in the country, served at the highest levels of government, and managed more than $1 billion of litigation-related investments.

Client Services & Case management Team: We have established large, in-house client-services and case-management teams to serve our clients from the early stages of litigation to the final moments of settlement distributions. We expertly and efficiently cover all aspects of our cases, including client intake, case workup, and litigation at all levels of the judiciary.

Technology, Data & Analytics Team: Keller Postman operates a dedicated, in-house technology, data, and analytics team, led by an accomplished graduate of the Massachusetts Institute of Technology. Our firm utilizes cutting-edge technology and processes to ensure successful litigation for thousands of claims at once.


Clients First Approach: Our primary goal is always to achieve exceptional results for our clients—we are tireless in our pursuit of justice on their behalf. We move with speed and efficacy. We genuinely care about each individual client, and we demonstrate that by providing outstanding client service.

Fearless Innovation: We drive innovation in the practice of law, sharing an ambition to do things differently—and to do them better. It is not enough merely to advocate for our clients. We prize creativity, develop and harness our own technology, and commit the resources necessary to succeed.

Committed to Excellence: We pursue unparalleled excellence in everything we do. We challenge ourselves to perform at the highest level and deliver outstanding results. At every level of the firm, we take pride in serving as trusted advisors and provide exceptional client service.

Strength to Win: Our team has the skills and resources to go head-to-head with the largest, most well-resourced corporations in the country. Plus, our lawyers have experience on both sides of the courtroom and the negotiating table, allowing us the unique ability to anticipate our opponents’ moves.


Keller Postman LLC is metro ranked in 1 practice areas. Best Law Firms rankings are based on a rigorous evaluation process.

Read how Best Law Firms ranks firms

Metro Rankings

Chicago, IL
Tier 3 for Product Liability Litigation - Plaintiffs


Metro Rankings

Chicago, IL
Tier 3 for Product Liability Litigation - Plaintiffs

Practice Areas

The below are areas of legal specialty volunteered by the firm and do not designate a specialty in which a Best Law Firms ranking is held.
  • Antitrust Law
  • Appellate Practice
  • Arbitration
  • Commercial Litigation
  • Consumer Law
  • Consumer Protection Law
  • Employment Law - Individuals
  • Government Relations Practice
  • Litigation - Antitrust
  • Litigation - Labor and Employment
  • Mass Tort Litigation / Class Actions - Plaintiffs
  • Personal Injury Litigation - Plaintiffs
  • Privacy and Data Security Law
  • Product Liability Litigation - Plaintiffs

Individuals Recognized in The Best Lawyers in America®

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Main Location

Office Locations

Washington, DC
1101 Connecticut Avenue, N.W., Suite 1100
Washington, DC 20036
United States
202-918-1123 Call our Washington, DC location at 202-918-1123 Get Directions Get directions to our Washington, DC location

Management and Personnel

Partner & Co-Founder
Ashley Keller
Zina Bash
Managing Partner
Warren Postman
Chief Executive Officer
Adam Gerchen
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