Cozen O’Connor

In Memoriam: Stephen A. Cozen

It is with deep sadness that Cozen O’Connor shares news of the passing of the founder and chairman of this great firm. A true giant in the legal world, he will be mourned as an incomparable advocate, counsellor, business leader, and philanthropist. His storied career spanned more than a half century and he leaves a legacy that extends well beyond the verdicts, rankings, titles, and accolades. His true legacy is the community he built and fostered, and we at Cozen O’Connor intend to honor that legacy now and well into the future.

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925+ Attorneys

Cozen O'Connor has widely recognized national practices in litigation, corporate, intellectual property, real estate and labor & employment and extensive experience in a variety of practice areas. Our talented professionals work collaboratively across disciplines and seamlessly throughout our 33 offices to achieve our clients' business objectives.

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RecentUpdates

Cozen O’Connor Recognized in Best Law Firms – Canada in 8 Practice Areas for 2025

Best Lawyers recognized Cozen O’Connor as a “Best Law Firm” in 1 practice area nationwide and 8 practice areas regionally in its 2025 Best Law Firms – Canada report…

Cozen O'Connor Doubles Down On New York Growth

Law360 Pulse talks about how Cozen O'Connor's New York office has almost doubled in size since moving to 3 World Trade Center in 2021. In the article, Mike Schmidt and Bill Davis highlight the firm's unique approach, elaborating on how Cozen O'Connor, originally based in Philadelphia, is now challenging traditional New York firms…

Important Information Regarding Corporate Transparency Act Which May Require Action in 2024

A new regulation under the federal Corporate Transparency Act (“CTA”) will require disclosure of information about all corporations, limited liability companies and limited partnerships (unless exempt) and…

Cozen O’Connor Expands its New York City Condo/Co-op Practice, Adding Real Estate Attorney Christopher Cobb

With New York City condo and co-op boards facing ever-increasing insurance, financial, tax, and regulatory headwinds, Cozen O’Connor today announced one of the city’s leading real estate litigators, Christopher Cobb, has joined its expanding Condominiums and Cooperatives practice…

Cozen O’Connor Recognized as a “Best Law Firm” in 31 Practice Areas Nationwide, 54 Practice Areas Regionally

Best Lawyers recognized Cozen O’Connor as a 2025 “Best Law Firm” in 31 practice areas nationwide and 54 practice areas regionally. Thirty practice areas were ranked Tier 1…

Cozen O’Connor LLP Represents Aduro Clean Technologies Inc. in its $4 Million U.S. Initial Public Offering and Nasdaq Listing

Cozen O’Connor LLP announced that it represented Aduro Clean Technologies Inc. (NASDAQ: ADUR; CSE: ACT; FSE: 9D5), a clean technology company using the power of chemistry to transform lower value feedstocks, like waste plastics, heavy bitumen, and renewable oils, into resources for the 21st century, in its $4 million U.S. initial public offering and Nasdaq listing…

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About Us

We Thrive On Results

For more than 50 years, we have defined ourselves by our clients’ success. As a full-service law firm, Cozen O'Connor guides and protects countless clients with the comprehensive spectrum of our legal services, including litigation, corporate and regulatory law. Our steadfast dedication makes us one of the top law firms in the country. In an industry built on talk, we’ve made our name by doing.

925+ Attorneys 33 Offices

Ranked among the top 100 law firms in the country, Cozen O’Connor has 925+ attorneys in 32 cities across two continents. We are a full-service firm with nationally recognized practices in litigation, business law, and government relations, and our attorneys have experience operating in all sectors of the economy. Our diverse client list includes global Fortune 500 companies, middle-market firms poised for growth, ambitious startups, and high-profile individuals.

One Victory At A Time

In an industry built on talk, Cozen O’Connor has made its name by doing. We have built our firm one case, one victory at a time. Our attorneys have impeccable academic credentials and are able to combine intellectual rigor with practicality and efficiency. We provide sophisticated, business-minded advice aimed at one simple goal: getting the right result for our clients. No matter how complex, contentious, or critical the undertaking, we persevere until the job is done.