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Capabilities 77 results

Practice Area

Mergers & Acquisitions

Winston is a leading advisor to public and private companies and investment advisers on corporate transactions. We have experience representing public and private companies, financial sponsors, boards of directors and special committees, financial advisors, and management teams. This perspective enables us to understand the concerns of parties on all sides of the table, protect our clients’ interests, and execute deals....Read more

Practice Area

Antitrust Transactions

   

Practice Area

ERISA Litigation

As a firm of choice for many major businesses, we represent employers, fiduciaries, boards of directors, benefit plans, and plan administrators in all aspects of ERISA litigation, including claims relating to fiduciary liability, plan investments, excessive fees, plan qualification, plan termination, reversion of excess assets, retiree medical benefits, severance and employment contract matters, tax liability matters, and retirement and welfare benefit claims....Read more

Experience 178 results

Experience

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September 9, 2025

Greenland Exploration Limited enters business combination with Pelican Acquisition Corporation and March GL Company

Winston & Strawn LLP represented Greenland Exploration Limited in a landmark business combination with Pelican Acquisition Corporation (NASDAQ: PELI) and March GL Company. The transaction, structured as a merger agreement, will result in the formation of Greenland Energy Company, expected to be publicly listed on NASDAQ under the ticker symbol “GLND.” Winston advised Greenland Exploration on all aspects of the deal, including regulatory strategy, corporate structuring, and negotiation of the merger terms....Read more

Experience

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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

Experience

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April 30, 2025

Federal Circuit Backs PayPal

In December 2022, Winston convinced Judge Albright of the W.D. Tex. to reverse his tentative construction and invalidate four patents based on means-plus-function indefiniteness at claim construction in the district court. Winston also persuaded Judge Albright to deny Fintiv’s motion for reconsideration the next month. Fintiv appealed to the Federal Circuit, which affirmed the district court in a precedential opinion in April 2025. Winston overcame a significant amount of sleight of hand from Fintiv, which continually shifted the purported structure of the “payment handler” term through claim construction, its motion for reconsideration, and appellate briefs, muddying the record. Ultimately the opinion clearly distinguished the factual record from that in Dyfan v. Target, curbing patentees abilities to argue that all code or applications are a “class of structures” and not indefinite under 112(f). The Federal Circuit affirmed four of the five patents Winston invalidated for PayPal, effectively foreclosing Fintiv’s ability to revive these patents for assertion. Winston also invalidated the fifth patent at the PTAB; Fintiv’s appeal of that Final Written Decision is pending....Read more
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Insights & News 1,242 results

Recognitions

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February 12, 2026

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1 Min Read

Winston Recognized in Chambers Global 2026

Winston & Strawn was recognized in Chambers Global 2026. Chambers & Partners is a prominent UK-based publishing organization that ranks lawyers and law firms based on robust editorial research and direct conversations with lawyers and clients....Read more

Client Alert

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February 9, 2026

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4 Min Read

AICPA Proposes Significant Changes to Ethics Rules Governing Private Equity Investments in Accounting Firms

On December 29, 2025, the American Institute of Certified Public Accountants (AICPA) Professional Ethics Executive Committee (PEEC) released an exposure draft proposing substantial revisions to its Code of Professional Conduct governing alternative practice structures (APS), which govern investments in accounting firms by private and public investors. The proposals represent the most significant regulatory development for private equity-backed accounting firms since PEEC first adopted APS guidance in 2000. This exposure draft follows a March 2025 discussion memorandum that resulted in the submission of 36 comment letters and extensive stakeholder engagement from accounting firm executives, state boards of accountancy, insurance liability carriers, accounting firms, academia, professional associations, and legal counsel for private equity sponsors.

In the Media

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February 2, 2026

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1 Min Read

Erin Weber Discusses Supreme Court Review of Pension Withdrawal Liability with Law360

Winston & Strawn partner Erin Weber was quoted in a Law360 article discussing a case that the U.S. Supreme Court will hear addressing how withdrawal liability is calculated when employers exit multiemployer pension plans. The court is reviewing whether actuarial assumptions must be fixed by a certain date when an employer leaves a multiemployer fund, or whether those assumptions can be retroactively adjusted....Read more
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Other Results 25 results

Location

Brussels

Winston & Strawn’s Brussels office further establishes our preeminent EU antitrust/competition practice at the epicenter of European competition law. The office is located on the famous Rue de la Loi or Wetstraat, which connects the Belgium Federal Parliament with the European Commission headquarters—the Berlaymont—and the Justus Lipsius, home to the Council of the European Union....Read more

Site Content

Survey of State Transaction Notification Requirements (Baby HSR)

Site Content

What Is Form 8-K Used For?

Form 8-K is a form required to be filed by registrants with the SEC when certain significant or “material” events occur, such as mergers and acquisitions, changes in management, and director resignations. The form generally must be filed with four business days of the event triggering disclosure....Read more
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