Winston & Strawn

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Professionals (545)
Capabilities (89)
Experience (60)
Insights & News (3,876)
Other Results (103)

Professionals 545 results

Samantha Lerner

Partner

Chicago

+1 312-558-6463

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Partner

Chicago

David Enzminger

Partner

+1 213-615-1780

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Partner

Nimalka Wickramasekera

Partner

+1 213-615-1819

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Partner

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Capabilities 89 results

Practice Area

Patent Litigation

Our Patent Litigation Practice is one of the country’s most active and highly regarded. Our seasoned patent litigators bring extensive courtroom experience to every matter we handle. According to Lex Machina, we are among the top three national patent defense firms in the country for number of appearances and cases filed, and we also were the top national defense firm for number of patent trials in the last five years (2018–2022)....Read more

Practice Area

Insurance Litigation

For decades, Winston has represented a broad array of clients in the insurance industry, including some of the world’s largest and best-known insurers. Our prowess in and understanding of the insurance industry encompasses not only its products, practices, and services, but also the increasing challenges posed by a world increasingly characterized by a fast-evolving technological landscape as well as financial, political, and environmental instability. Accordingly, Winston’s lawyers are among the most sought-after in the industry—not only by companies currently facing high-stakes litigations and investigations, but by those looking to take preventive action now in order to mitigate and manage their risk in the future....Read more

Practice Area

Bankruptcy Litigation & Investigations

Large corporate bankruptcies and companies in financial distress often spawn a complex web of claims by lenders, trustees, debtors, creditors, creditors’ committees, investors, shareholders, and other constituents. Attorneys in Winston & Strawn’s complex commercial litigation group and special situations and restructuring group serve as trusted advisors and resolute advocates to protect clients’ business interests and assets in multifaceted Chapter 11 cases and bankruptcy-related disputes. ...Read more

Experience 60 results

Experience

January 27, 2026

PayPal Successfully Invalidates Asserted Claims of Secure Payment Transaction Patent Under 35 U.S.C. § 101

Winston & Strawn secured a decisive victory for PayPal in an intellectual property dispute brought by Irish non-practicing entity Internet Payment Patents LTD (IPPL). Magistrate Judge Susan van Keulen of the Northern District of California entered final judgment in PayPal’s favor, finding all asserted patent claims ineligible under 35 U.S.C. § 101 and granting PayPal’s motion to dismiss without leave to amend....Read more

Experience

December 11, 2025

Winston Takes the Checkered Flag After “Massive Win” Settlement

Winston squared off in the W.D.N.C. against lawyers for NASCAR in an antitrust lawsuit brought on behalf of racing teams Front Row Motorsports Inc. and 23X1 Racing LLC—the team co-owned by Michael Jordan and driver Denny Hamlin—alleging monopolization of the market for premier stock car racing teams. On December 11, 2025, nine days into trial and the morning after the plaintiffs rested their case, the parties jointly announced a settlement. Jeffrey Kessler, Jeanifer Parsigian, and Danielle Williams were recognized by American Lawyer with its top “Litigator of the Week” honors on December 19, 2025, for this historic settlement....Read more

Experience

September 8, 2025

Winston Wins Ninth Circuit Reversal and Class Certification in Swimmers’ Antitrust Case, Securing a Global-Impact Settlement with World Aquatics

Winston represents a class of professional swimmers alleging World Aquatics (WA) violated antitrust laws by blocking their participation in the competing International Swimming League. After WA won summary judgment, Winston successfully appealed, arguing the court applied improper antitrust standards and wrongly denied certification of a damages class. In September 2024, the Ninth Circuit reversed both rulings, reviving all claims and issuing a landmark ruling on the possible application of the per se rule or quick look review to sports-associations rules. Am Law awarded Winston “Litigator of the Week” Runner-Up recognition for the win. In November 2024, the Ninth Circuit denied rehearing. In April 2025, the district court certified a damages class....Read more

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Insights & News 3,876 results

Recognitions

February 19, 2026

Less Than 1 Min Read

Winston Ranked Among the Top Ten Firms for Patent Litigation by Patexia

Winston & Strawn was recognized among the top ten law firms for patent litigation in Patexia’s 2026 Patent Litigation Report. The ranking is based on both activity and performance....Read more

Client Alert

February 19, 2026

4 Min Read

Upcoming Registration and Reporting Deadlines for VC Funds with CA Nexus

Under California’s Fair Investment Practices by Venture Capital Companies Law (the FIPVCC), venture capital funds with a nexus to California (Covered Entities) will be required to register with the California Department of Financial Protection & Innovation (the DFPI) starting in March 2026 and report demographic information about their portfolio companies to the DFPI starting in April 2026. The purpose of the FIPVCC is to increase transparency regarding the demographics of the founding teams of the portfolio companies in which Covered Entities invest.

Global Trade & Foreign Policy Insights

February 19, 2026

9 Min Read

United States Issues Significant New Sanctions Relief for Venezuela’s Oil & Gas Sector

Although Venezuela remains subject to sanctions targeting the Government of Venezuela (GoV) and entities in which it holds a 50% or greater ownership interest, the U.S. Department of the Treasury’s Office of Foreign Assets Control (OFAC) has issued a series of General Licenses (GLs) representing the broadest easing of Venezuela-related sanctions in years.

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Other Results 103 results

Law Glossary

What Are the Patent Litigation Differences Between the BPCIA and Hatch-Waxman Act?

There are fundamental differences between the abbreviated approval processes to obtain FDA approval for biosimilars and generic drugs as those processes relate to patent litigation....Read more

Law Glossary

What Is the Patent Dance?

Colloquially referred to as the “patent dance,” the BPCIA provides a framework that includes certain steps and a schedule during which the applicant and reference product sponsor exchange confidential information disclosed in the aBLA. During the patent dance, the applicant and sponsor identify the patents that could be litigated in the future during two potential phases of litigation. In the first phase, the sponsor can allege infringement of a subset of the patents identified during the patent dance. The second phase begins after the sponsor receives the Notice of Commercial Marketing from the applicant. During this second phase, the sponsor can assert any remaining patents that were not asserted in the first phase....Read more

Law Glossary

What Is the Patent Trial and Appeal Board?

The Patent Trial and Appeal Board (PTAB) is a tribunal within U.S. Patent and Trademark Office. The PTAB oversees trial proceedings, namely: inter partes review (IPR), post-grant review (PGR), covered business method (CBM) review, and derivation proceedings. The Board also hears appeals from adverse patentability decisions by patent examiners in original applications, reissues, and reexaminations. And, while phasing out since the passage of the America Invents Act (AIA) in 2011, the PTAB is also responsible for deciding interferences. The PTAB was previously referred to as the Board of Patent Appeals and Interferences and was renamed by the AIA....Read more