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Weil is a leader in the marketplace for sophisticated, global legal services. Our pioneering “one-firm” approach, which integrates approximately 1,200 attorneys across three continents and multiple practice areas, allows the Firm to partner with many of the world’s most successful organizations on matters as complex and interconnected as the businesses themselves.
Featuring approximately 350 lawyers in more than a dozen practice areas and areas of specialization, Weil’s global Litigation Department is one of the largest, most diversified, and highly respected in the legal industry. We provide clients with business-oriented solutions to complex, multi-faceted legal challenges, including business disputes, regulatory actions and investigations, financial distress, and other potentially enterprise-changing circumstances.
Our expertise spans a number of substantive areas:
Antitrust: Weil is regularly retained by some of the largest corporations in the world to handle their antitrust litigation matters. Our Antitrust practice advises clients on the interrelationship between antitrust, IP, trade, and unfair competition laws and regulations, and litigates and tries those cutting-edge issues in civil and criminal cases before juries and judges in jurisdictions across the United States. Representative clients include Bridgestone, GrubHub, Hilton Worldwide, Meta Platforms, Panasonic, Paramount Global, Regeneron, Saks Fifth Avenue, Simon & Schuster, and Warner Bros. Discovery.
Appellate: Weil’s Appeals and Strategic Counseling practice covers all of the Firm’s substantive areas of expertise, including employment, securities, copyright and trademark, patent, tax, bankruptcy, antitrust, civil rights, and administrative and constitutional law, among others. With 33 practitioners located across the United States, including former clerks to U.S. Supreme Court justices, over a dozen former clerks to federal appellate judges, a former Assistant Solicitor General for the State of New York, and a former Assistant to the Solicitor General of the United States, we regularly prosecute and defend appeals before the U.S. Supreme Court, all 13 federal circuit courts, and a range of state intermediate and supreme courts. We are regularly called upon to provide essential support before lower courts and regulatory agencies, as well as to assess whether litigation is advisable. Representative clients include BNSF Railway, Comcast, Elanco, Grubhub, Regeneron, Saks Fifth Avenue, Sanofi, Sears Holdings, Speedcast, Washington State University, and many major technology companies.
Bankruptcy: Weil is well-known as the leading restructuring firm in the world. We not only invented much of what is standard today, but we also have been involved in almost every type of consensual and litigated restructuring transaction in the United States since the 1970s. Weil has served as chief debtors’ counsel in the largest U.S. bankruptcy filings in history and has represented clients in numerous complicated international insolvencies. Our experience extends to exchange offers, debt for equity swaps, pre-packaged and prearranged chapter 11 cases, as well as conventional chapter 11 reorganizations.
General Commercial: Weil is a one-stop firm for commercial litigation matters, and has achieved significant victories in high-profile disputes for BNSF Railway, Burger King, eBay, ExxonMobil, Paramount Global, PepsiCo, Repsol, Sanofi, Serta Simmons, and Warner Bros. Discovery, among others. We specialize in trying high-stakes breach of contract, fraud, tortious interference, unfair competition and other business tort claims, class actions, and litigations arising under RICO, the False Claims Act, and numerous other statutes.
Intellectual Property: Weil offers market-leading capabilities in IP litigation, including complex patent, trade secret, copyright, and trademark disputes, as well as counseling. For decades, Weil’s prestigious IP/Media group has been at the forefront of hot-button industry issues. The group’s work in the area of digital media has been trailblazing, touching on multiple areas of commercial significance including artificial intelligence, e-commerce, digital rights management, and digital content licensing. We are also recognized for our expertise in false advertising, music licensing, television/motion picture and other content distribution, and privacy/data protection issues. Representative clients include A&E Television Networks, AIG, Alibaba, eBay, Getty Images, Meta Platforms, Pandora Media, and SiriusXM. Weil’s Patent Litigation group focuses on high-stakes patent and IP disputes, whether they involve winning a key patent infringement action at trial or on appeal before the Federal Circuit, litigating a complex investigation at the ITC, or trying contested IPR proceedings at the PTAB. Our team includes 39 attorneys, many of whom have technical degrees, allowing us to identify critical issues, understand the technology at the forefront of a case, and become trusted advisors to our clients, which include Altria, BeiGene, Bio Rad, Comcast, HP, Illumina, Johnson & Johnson, , Palo Alto Networks, Regeneron, and Sanofi.
International Arbitration: Leading multinationals involved in important international disputes repeatedly turn to Weil for its business oriented approach, understanding of specific cultural issues, extensive government and trade experience, and recognized skill in handling complex investment and commercial arbitrations before all major arbitral institutions, including the ICC, AAA, LCIA, and ICSID.
Product Liability: Weil’s Product Liability & Mass Tort practice handles nationwide class actions, MDL proceedings, and joint state/federal litigations, among other matters, and has won some of the largest consumer fraud class actions involving alleged product defects in the United States. Our experience extends to a broad range of issues – including product defects, environmental remediation and indemnification, natural disasters, chemical contamination, PFAS (forever chemicals), and crisis management – in sectors that include automotive products, industrial chemicals, medical devices, toys, food and beverage, pharmaceuticals, heavy equipment, and airlines. Notable clients include Alibaba, Dometic, ExxonMobil, Johnson & Johnson, L'Oréal, Nike, PepsiCo, Procter & Gamble, Repsol, and Sanofi.
Securities: Weil’s Securities Litigation practice has handled numerous high-stakes, precedent-setting disputes, including those related to the insolvency or restructuring of major financial institutions, high-profile SEC enforcement proceedings, white-collar securities prosecutions, proxy contests, busted-deal and other M&A litigation, and class action and derivative litigation. The group continues to tackle complex litigation and investigations for clients such as AIG, AMC Entertainment, Brookfield, Digital Currency Group, Elanco, Getty Images, Marathon Digital Holdings, Morgan Stanley, Sanofi, Walgreens, and Warner Bros. Discovery, as well as shareholder suits arising out of large, sophisticated M&A and SPAC transactions.
White Collar Crime: Led by an elite group of highly ranked criminal defense lawyers with extensive government experience, Weil’s White Collar Defense, Regulatory & Investigations practice conducts complex internal investigations and handles an array of criminal, civil, and regulatory investigations and parallel litigation arising out of accounting and securities issues, allegations of insider trading, money laundering, fraud, executive misconduct, and cartelization, and allegations related to U.S. criminal and regulatory laws with international and extra-territorial dimensions, such as the Foreign Corrupt Practices Act.
Featuring approximately 350 lawyers in more than a dozen practice areas and areas of specialization, Weil’s global Litigation Department is one of the largest, most diversified, and highly respected in the legal industry. We provide clients with business-oriented solutions to complex, multi-faceted legal challenges, including business disputes, regulatory actions and investigations, financial distress, and other potentially enterprise-changing circumstances.
Our expertise spans a number of substantive areas:
Antitrust: Weil is regularly retained by some of the largest corporations in the world to handle their antitrust litigation matters. Our Antitrust practice advises clients on the interrelationship between antitrust, IP, trade, and unfair competition laws and regulations, and litigates and tries those cutting-edge issues in civil and criminal cases before juries and judges in jurisdictions across the United States. Representative clients include Bridgestone, GrubHub, Hilton Worldwide, Meta Platforms, Panasonic, Paramount Global, Regeneron, Saks Fifth Avenue, Simon & Schuster, and Warner Bros. Discovery.
Appellate: Weil’s Appeals and Strategic Counseling practice covers all of the Firm’s substantive areas of expertise, including employment, securities, copyright and trademark, patent, tax, bankruptcy, antitrust, civil rights, and administrative and constitutional law, among others. With 33 practitioners located across the United States, including former clerks to U.S. Supreme Court justices, over a dozen former clerks to federal appellate judges, a former Assistant Solicitor General for the State of New York, and a former Assistant to the Solicitor General of the United States, we regularly prosecute and defend appeals before the U.S. Supreme Court, all 13 federal circuit courts, and a range of state intermediate and supreme courts. We are regularly called upon to provide essential support before lower courts and regulatory agencies, as well as to assess whether litigation is advisable. Representative clients include BNSF Railway, Comcast, Elanco, Grubhub, Regeneron, Saks Fifth Avenue, Sanofi, Sears Holdings, Speedcast, Washington State University, and many major technology companies.
Bankruptcy: Weil is well-known as the leading restructuring firm in the world. We not only invented much of what is standard today, but we also have been involved in almost every type of consensual and litigated restructuring transaction in the United States since the 1970s. Weil has served as chief debtors’ counsel in the largest U.S. bankruptcy filings in history and has represented clients in numerous complicated international insolvencies. Our experience extends to exchange offers, debt for equity swaps, pre-packaged and prearranged chapter 11 cases, as well as conventional chapter 11 reorganizations.
General Commercial: Weil is a one-stop firm for commercial litigation matters, and has achieved significant victories in high-profile disputes for BNSF Railway, Burger King, eBay, ExxonMobil, Paramount Global, PepsiCo, Repsol, Sanofi, Serta Simmons, and Warner Bros. Discovery, among others. We specialize in trying high-stakes breach of contract, fraud, tortious interference, unfair competition and other business tort claims, class actions, and litigations arising under RICO, the False Claims Act, and numerous other statutes.
Intellectual Property: Weil offers market-leading capabilities in IP litigation, including complex patent, trade secret, copyright, and trademark disputes, as well as counseling. For decades, Weil’s prestigious IP/Media group has been at the forefront of hot-button industry issues. The group’s work in the area of digital media has been trailblazing, touching on multiple areas of commercial significance including artificial intelligence, e-commerce, digital rights management, and digital content licensing. We are also recognized for our expertise in false advertising, music licensing, television/motion picture and other content distribution, and privacy/data protection issues. Representative clients include A&E Television Networks, AIG, Alibaba, eBay, Getty Images, Meta Platforms, Pandora Media, and SiriusXM. Weil’s Patent Litigation group focuses on high-stakes patent and IP disputes, whether they involve winning a key patent infringement action at trial or on appeal before the Federal Circuit, litigating a complex investigation at the ITC, or trying contested IPR proceedings at the PTAB. Our team includes 39 attorneys, many of whom have technical degrees, allowing us to identify critical issues, understand the technology at the forefront of a case, and become trusted advisors to our clients, which include Altria, BeiGene, Bio Rad, Comcast, HP, Illumina, Johnson & Johnson, , Palo Alto Networks, Regeneron, and Sanofi.
International Arbitration: Leading multinationals involved in important international disputes repeatedly turn to Weil for its business oriented approach, understanding of specific cultural issues, extensive government and trade experience, and recognized skill in handling complex investment and commercial arbitrations before all major arbitral institutions, including the ICC, AAA, LCIA, and ICSID.
Product Liability: Weil’s Product Liability & Mass Tort practice handles nationwide class actions, MDL proceedings, and joint state/federal litigations, among other matters, and has won some of the largest consumer fraud class actions involving alleged product defects in the United States. Our experience extends to a broad range of issues – including product defects, environmental remediation and indemnification, natural disasters, chemical contamination, PFAS (forever chemicals), and crisis management – in sectors that include automotive products, industrial chemicals, medical devices, toys, food and beverage, pharmaceuticals, heavy equipment, and airlines. Notable clients include Alibaba, Dometic, ExxonMobil, Johnson & Johnson, L'Oréal, Nike, PepsiCo, Procter & Gamble, Repsol, and Sanofi.
Securities: Weil’s Securities Litigation practice has handled numerous high-stakes, precedent-setting disputes, including those related to the insolvency or restructuring of major financial institutions, high-profile SEC enforcement proceedings, white-collar securities prosecutions, proxy contests, busted-deal and other M&A litigation, and class action and derivative litigation. The group continues to tackle complex litigation and investigations for clients such as AIG, AMC Entertainment, Brookfield, Digital Currency Group, Elanco, Getty Images, Marathon Digital Holdings, Morgan Stanley, Sanofi, Walgreens, and Warner Bros. Discovery, as well as shareholder suits arising out of large, sophisticated M&A and SPAC transactions.
White Collar Crime: Led by an elite group of highly ranked criminal defense lawyers with extensive government experience, Weil’s White Collar Defense, Regulatory & Investigations practice conducts complex internal investigations and handles an array of criminal, civil, and regulatory investigations and parallel litigation arising out of accounting and securities issues, allegations of insider trading, money laundering, fraud, executive misconduct, and cartelization, and allegations related to U.S. criminal and regulatory laws with international and extra-territorial dimensions, such as the Foreign Corrupt Practices Act.
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Bunsow De Mory is a leading IP litigation and trial boutique firm based in Silicon Valley with an additional office in northern Virginia. The firm’s recent victories have firmly cemented its position as one of the country’s elite patent trial firms.
Bunsow De Mory succeeds because of its singular focus: unwavering commitment to achieving its client’s goals, even against the odds. Firm lawyers don’t shy away from the most difficult challenges against the biggest technology companies in the world. They thrive on them.
The firm focuses on plaintiff-side patent cases, where clearing the hurdles to get to trial is rare, and winning at trial is even rarer. Yet, Bunsow De Mory continues to defy the odds, securing more than $250 million in verdicts and settlements in the last two years alone.
Bunsow De Mory PTAB’s practice is second to none. Based on empirical studies of PTAB results, Patexia recently ranked Bunsow De Mory as the best performing law firm at the PTAB from July 2020 to June 2025.
The firm works on matters across a range of technologies and industries, including mobile automotive, telecommunications, artificial intelligence, fintech, and life sciences.
Legal experts have recognized the firm’s excellence. In addition to its recognition by Benchmark Litigation, the was also ranked as Highly Recommended for patent disputes by Managing IP and was listed in the Chambers USA guide for intellectual property—patent litigation.
Updated Dec 2025
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Who We Are: Founded in October 2018, Reichman Jorgensen Lehman & Feldberg LLP (RJLF) entered the market as a trial boutique with national reach and a bold ambition to create a new standard for litigation firms. Focusing on high-stakes commercial litigation, intellectual property, and white collar disputes, the firm made national headlines for breaking away from many law firm traditions. RJLF reinvented the practice of law without the billable hour in favor of fee arrangements that align with client interests. The firm also eliminated two other standard law firm features – the partnership track and lockstep compensation – replacing them with systems that encourage attorneys to advance as quickly as their skills allow. Committed to attracting and retaining top talent, RJLF pays above market.
Diversity is one of RJLF’s founding principles. We believe our diverse talent brings a variety of thoughts, experiences, and perspectives that inevitably improve decision making and communication with our clients, judges, and juries. The firm is majority women-owned and 30% of our firm’s lawyers are racially and/or LGBTQ+ diverse. As part of the firm’s commitment to diversity, RJLF has achieved Mansfield Certification “Plus” status by Diversity Lab. This signifies not only our adherence to the program’s consideration and transparency standards, but also that we have attained 30% representation of historically underrepresented lawyers in our current leadership roles and pathway activities.
RJLF has been recognized as a “Top Trial Boutique” and awarded “Silicon Valley Firm of the Year” for three consecutive years by Benchmark Litigation and named an “Elite Boutique” by The National Law Journal.
Elite Talent Wins Cases: RJLF’s break from industry traditions obviously resonated with the market, as the firm’s size quickly expanded with marquee talent from several esteemed “Big Law” firms such as Finnegan Henderson; Hughes Hubbard & Reed; Allen & Overy; Morgan Lewis, & Bockius; and White & Case LLP, among many others.
Our attorneys are from the most prestigious clerkships, including the Supreme Court, the D.C. Circuit, the Federal Circuit, the 2nd, 6th, 7th, and 11th Circuits, and District Courts around the country, as well as prestigious law schools such as Harvard, Stanford, Yale, Columbia, Berkeley, NYU, and others.
The firm’s lawyers have undergraduate and advanced technical degrees in diverse fields including electrical engineering, physics, computer science, computer networks, and biotechnology. RJLF’s lawyers have also been recognized as among the most accomplished trial lawyers by The American College of Trial Lawyers, Chambers USA, The Legal 500, The National Law Journal, and Managing IP, among many others.
Recent Achievements: Punching well above its weight, RJLF often goes toe-to-toe with some of the largest law firms in the world, including Skadden Arps, Morrison & Foerster, Gibson Dunn, and Baker Hostetler, among others. Highlights of the firm’s trial prowess and recent significant wins include:
Commercial Litigation: RJLF secured a precedent-setting victory on behalf of the CRA in the “gas ban on stoves” case against the City of Berkeley. The Ninth Circuit reversed the District Court’s ruling and held that Berkeley’s ban on natural gas hook-ups is preempted by federal law and therefore invalid. The case garnered extensive national attention from major news outlets, including The Wall Street Journal, The New York Times, Bloomberg, and Reuters, among others.
Intellectual Property Litigation: RJLF won a landmark $673 million award for Kove IO in a patent infringement case against Amazon Web Services, which involved cloud storage technology. The court upheld a $525 million verdict and added $148 million in interest during post-trial motions. This victory was the largest surviving patent win of 2024, ranked as the ninth highest in the past decade, and recognized as a Top 100 Verdict of 2024 by Law.com’s VerdictSearch.
White Collar Litigation: In an ultrarare price-fixing trial against the Department of Justice (DOJ), the RJLF trial team secured a complete defence verdict after two mistrials. The case stemmed from a high-profile grand jury indictment by the DOJ that charged 10 executives, including RJLF client Roger Austin, a former Vice President of Pilgrim’s Pride, alleging a price-fixing scheme in the $28 billion-per-year broiler chicken industry. The trial win earned the team Global Competition Review’s 2023 Behavioural Matter of the Year (Americas).
Pro Bono: RJLF is deeply committed to public interest litigation. We understand that our privilege of being trial lawyers naturally involves representing those in need, whether it’s high-profile impact litigation or a person who will be evicted from an apartment. We also collaborate and work side-by- side with our clients to develop targeted pro bono and community service programs. Our pro bono activities include handling cases involving civil rights, immigration, prison abuse, indigent defence, homelessness, and veterans’ issues, among others. The firm was honored by The Legal Aid Society as a recipient of the 2025 Pro Bono Publico Awards for its outstanding service to the organization and its clients.
Diversity is one of RJLF’s founding principles. We believe our diverse talent brings a variety of thoughts, experiences, and perspectives that inevitably improve decision making and communication with our clients, judges, and juries. The firm is majority women-owned and 30% of our firm’s lawyers are racially and/or LGBTQ+ diverse. As part of the firm’s commitment to diversity, RJLF has achieved Mansfield Certification “Plus” status by Diversity Lab. This signifies not only our adherence to the program’s consideration and transparency standards, but also that we have attained 30% representation of historically underrepresented lawyers in our current leadership roles and pathway activities.
RJLF has been recognized as a “Top Trial Boutique” and awarded “Silicon Valley Firm of the Year” for three consecutive years by Benchmark Litigation and named an “Elite Boutique” by The National Law Journal.
Elite Talent Wins Cases: RJLF’s break from industry traditions obviously resonated with the market, as the firm’s size quickly expanded with marquee talent from several esteemed “Big Law” firms such as Finnegan Henderson; Hughes Hubbard & Reed; Allen & Overy; Morgan Lewis, & Bockius; and White & Case LLP, among many others.
Our attorneys are from the most prestigious clerkships, including the Supreme Court, the D.C. Circuit, the Federal Circuit, the 2nd, 6th, 7th, and 11th Circuits, and District Courts around the country, as well as prestigious law schools such as Harvard, Stanford, Yale, Columbia, Berkeley, NYU, and others.
The firm’s lawyers have undergraduate and advanced technical degrees in diverse fields including electrical engineering, physics, computer science, computer networks, and biotechnology. RJLF’s lawyers have also been recognized as among the most accomplished trial lawyers by The American College of Trial Lawyers, Chambers USA, The Legal 500, The National Law Journal, and Managing IP, among many others.
Recent Achievements: Punching well above its weight, RJLF often goes toe-to-toe with some of the largest law firms in the world, including Skadden Arps, Morrison & Foerster, Gibson Dunn, and Baker Hostetler, among others. Highlights of the firm’s trial prowess and recent significant wins include:
Commercial Litigation: RJLF secured a precedent-setting victory on behalf of the CRA in the “gas ban on stoves” case against the City of Berkeley. The Ninth Circuit reversed the District Court’s ruling and held that Berkeley’s ban on natural gas hook-ups is preempted by federal law and therefore invalid. The case garnered extensive national attention from major news outlets, including The Wall Street Journal, The New York Times, Bloomberg, and Reuters, among others.
Intellectual Property Litigation: RJLF won a landmark $673 million award for Kove IO in a patent infringement case against Amazon Web Services, which involved cloud storage technology. The court upheld a $525 million verdict and added $148 million in interest during post-trial motions. This victory was the largest surviving patent win of 2024, ranked as the ninth highest in the past decade, and recognized as a Top 100 Verdict of 2024 by Law.com’s VerdictSearch.
White Collar Litigation: In an ultrarare price-fixing trial against the Department of Justice (DOJ), the RJLF trial team secured a complete defence verdict after two mistrials. The case stemmed from a high-profile grand jury indictment by the DOJ that charged 10 executives, including RJLF client Roger Austin, a former Vice President of Pilgrim’s Pride, alleging a price-fixing scheme in the $28 billion-per-year broiler chicken industry. The trial win earned the team Global Competition Review’s 2023 Behavioural Matter of the Year (Americas).
Pro Bono: RJLF is deeply committed to public interest litigation. We understand that our privilege of being trial lawyers naturally involves representing those in need, whether it’s high-profile impact litigation or a person who will be evicted from an apartment. We also collaborate and work side-by- side with our clients to develop targeted pro bono and community service programs. Our pro bono activities include handling cases involving civil rights, immigration, prison abuse, indigent defence, homelessness, and veterans’ issues, among others. The firm was honored by The Legal Aid Society as a recipient of the 2025 Pro Bono Publico Awards for its outstanding service to the organization and its clients.
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The Litigation & Trial Department leverages a global platform to provide unmatched legal services. With over 1000 top-tier litigators, we bring experience, insight, and determination to every client. Our pragmatic approach ensures favorable results through effective collaboration with local counsel, co-counsel, and government regulators. We develop aggressive and creative litigation strategies, often resolving matters before trial. When necessary, clients can rely on our ability to win at trial, arbitration, regulatory proceedings, and on appeal.
Antitrust & Competition: Our distinguished team comprises highly qualified lawyers adept in both local and international antitrust and competition matters. We provide expert counsel on merger clearance, cartel investigations, competition-related litigation, IP antitrust issues, and compliance training. Our team is committed to delivering exceptional client service in cases involving monopolization challenges, rapid-response merger litigation, and innovative, high-stakes theories.
Complex Commercial Litigation: Our team combines trial-ready capabilities and business fluency to tackle complex challenges. We represent public and private companies, financial institutions, private equity firms, governmental entities, and high net worth individuals in commercial disputes. Over the past decade, we have tried or arbitrated hundreds of cases to verdict with an extraordinary success rate in US federal and state courts and arbitration panels. Our team includes more than 350 former federal law clerks and more than 35 former federal prosecutors, providing invaluable institutional knowledge and courtroom experience.
Connectivity, Privacy & Information: Our firm brings together a global team of lawyers addressing the critical legal issues arising from digital technology and services, in disciplines including communications, data privacy and cybersecurity, internet law, and digital copyright. Our team handles high-profile litigation, regulatory investigations and counseling, internal investigations, and technology transactions for clients in multiple industry sectors. We handle matters requiring extensive experience in particular areas of the law governing digital commerce, as well as matters that cut across legal silos to deliver exceptional results for our clients.
Environmental Litigation: We represent clients in administrative and regulatory proceedings, enforcement, litigation, transactions, and legislative matters. We help clients navigate complex agency rulemakings, secure approvals for energy and infrastructure projects, and resolve environmental investigations and compliance issues. Our wide-ranging expertise and unique government experience set us apart, delivering successful outcomes in groundbreaking matters worldwide.
Intellectual Property Litigation: Our litigators have unparalleled experience in IP strategy and disputes, including patent, trademark, copyright, trade dress, and trade secrets. We are actively involved in precedent-setting multijurisdictional litigation on a global scale, including extensive experience across numerous U.S. district courts, as well as proceedings before the Federal Circuit, ITC, and PTAB. Our team is comprised of technically trained lawyers, technical analysts, and dedicated IP paralegals, adept at managing cases in diverse industries across life sciences, technology, and more, including semiconductors, software, biotechnology, pharmaceuticals, medical devices, electric motors, engines, emerging technologies, cloud computing and networking, packaging, building products, and banking technologies, among others.
Securities Litigation & Professional Liability: Our Securities and M&A Litigation team is renowned for its exceptional expertise in handling complex securities class actions, shareholder derivative litigation, and litigation arising from M&A transactions. We have defended more federal securities lawsuits than any other firm in the US in the last five years, and our presence in the Delaware courts is unparalleled among our peer firms (Lex Machina). Recognized as the Securities Group of the Year by Law360 in four of the past five years, and consistently ranked #1 by Chambers and Legal500, our team comprises leading lawyers, former federal prosecutors, and senior SEC staff. We are the go-to firm for Fortune 500 companies, major financial institutions, and the Big Four accounting firms, securing high-profile, precedent-setting victories. We excel at resolving matters before trial through dispositive motions or settlements, and have a proven track record in trial success.
Supreme Court & Appellate: Led by a former U.S. Solicitor General, our Supreme Court and Appellate Practice boasts an outstanding record before the U.S. Supreme Court and other appellate courts. Over the past two decades, our advocates have argued more than 100 cases before the Supreme Court, representing Fortune 100 corporations, state governments, leading educational institutions, and individuals. Recently, we secured certiorari in nearly a dozen cases and have prepared briefs for hundreds of cases in both federal and state appellate courts.
White Collar Defense & Investigations: Our firm is at the forefront of advising on white collar and enforcement matters, offering unparalleled expertise in high-profile, sensitive cases globally. We leverage deep experience with regulators and prosecutors to guide clients through inquiries and investigations, skillfully defending against enforcement actions and prosecutions. Our track record includes avoiding charges and achieving full acquittals, often defeating government prosecutions before trial. We represent clients in actions by the SEC, DOJ, PCAOB, FINRA, CFTC, state attorneys general, Congress, and other global regulators. Our team excels in export controls, economic sanctions, and national security-related work, including CFIUS reviews and FOCI mitigation. Our defense lawyers include former senior prosecutors and government officials from top agencies.
Updated Oct 2025
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Sophisticated clients worldwide entrust us with their formidable disputes for a single reason–our remarkable track record. Clients seek our advice on high-stakes litigation and cross-border disputes, as well as government and internal investigations in the Americas, Europe and Asia.
Anti-Discrimination and DEI Advisory: Our practice is dedicated to providing comprehensive legal counsel and strategic guidance on matters relating to anti-discrimination laws and diversity, equity, and inclusion (DEI) initiatives. Our areas of focus include workplace investigations, litigation, legal compliance, culture and equity reviews, strategic counseling and training and education.
Antitrust and Trade Regulation: Clients turn to us for our record of success in handling high-stakes antitrust disputes, investigations, and achieving regulatory clearance for the largest and most complicated transactions. We advise clients on internal investigations, enforcement matters, and regulatory issues in connection with the OFAC, the Department of State, and the SEC.
Appellate: Our clients appreciate that Simpson Thacher is a formidable force in the appellate arena. They turn to us for our reputation for procuring against the odds, law-defining appellate rulings across a wide range of areas, including class actions, commercial, securities litigation, and pro bono.
Asset Management Litigation: Our team advises the world’s largest and most sophisticated investment managers and advisers on complex, high-stakes disputes and handles fund civil litigation, including litigation in federal and state courts, before arbitration tribunals, and in other forums across the globe. Our clients benefit from our extensive experience in the asset management industry where we take a holistic view in advising clients on their legal, regulatory, and compliance considerations. We also routinely advise on the potential for resolution of out-of-court disputes.
Asset Management Regulatory and Enforcement: Our team includes attorneys with decades of experience in the funds industry, former senior government officials from the SEC, and former U.S. federal prosecutors, who draw upon their deep experience and institutional knowledge to provide sophisticated advice to clients on a broad spectrum of critical regulatory and compliance issues.
Bankruptcy Litigation: Our comprehensive practice covers all aspects of bankruptcy-related litigation–from disputes over plan confirmation to tender liability and equitable subordination claims to issues arising out of insurance disputes and mass tort-related bankruptcies.
ERISA Litigation: Clients benefit from our coordinated advice in closely aligned areas, including securities, bankruptcy, and government investigations, and our ability to present arguments and evidence in the manner best suited to advance business interests and resolve conflicts with minimal disruption to their operations.
False Advertising Litigation: Companies in a broad range of fields, including pharmaceuticals, financial services, consumer products and food and beverage, turn to us for our significant experience in false advertising litigation, including disputes between competitors and consumer class actions, as well as for ongoing regulatory guidance.
Government and Internal Investigations: Large and small companies and their boards, audit and special committees, officers and directors, and other individuals regularly turn to us for advice on a wide range of criminal, regulatory, congressional and other sensitive government inquiries and internal investigations.
Insurance and Reinsurance: Clients benefit from our experience as the leading firm representing the interests of both ceding companies and reinsurers in litigations and arbitrations throughout the United States, the United Kingdom and Bermuda. Major insurance groups, including Travelers, AIG, Berkshire Hathaway, Lloyd’s of London and CNA have trusted us on their most significant matters.
Intellectual Property Litigation: Understanding and protecting IP is crucial to the long-term success of many businesses. Clients seek our advice in high-stakes, “make it or break it” disputes and rely on our broad array of substantive experience in both litigation and transactional matters to help them protect their interests. We unite sophisticated litigation skills with a deep understanding of all types of intellectual property, including patents, copyrights, trade secrets and proprietary data, software, and trademarks.
International Disputes and Arbitration: We handle high-stakes international disputes and commercial crises, where the outcome is uncertain and our clients need the highest quality of service. Our collaborative team operates worldwide from the Firm’s London office. The scope of our practice from the London office reaches across all of North and South America, Europe, the Middle East and Asia-Pacific.
International Regulatory and Compliance: With increased activism and cross-border cooperation between enforcement and regulatory agencies, we represent the interests of a wide array of clients operating in multiple jurisdictions and have advised on issues in China, India, Eastern Europe, the Middle East, Latin America and Africa.
Mergers and Acquisitions Litigation: Clients seek our market-leading advice in all aspects of M&A litigation—where we excel at defending challenges to the largest and most complex mergers and acquisitions. They appreciate our extensive experience defeating efforts to enjoin transactions prior to closing; resolving claims through reasonable settlements pre-closing; and litigating claims for damages post-closing.
Privacy and Cybersecurity: Our multidisciplinary Privacy and Cybersecurity team advises global companies facing heightened regulatory, contractual and consumer obligations surrounding the management of data, including personal data and use of AI.
Product Liability and Mass Tort: Since the 1970s, clients have relied on our advice as a leader in the development of product liability and mass tort law in the United States. We have taken countless product liability and mass tort cases to jury trial in state and federal courts over the years, amassing invaluable courtroom experience.
Securities: For decades, clients have relied on our securities litigators in the most complex, high-profile, high-stakes securities matters of the day. The country’s most respected Fortune 500 corporations and financial institutions turn to us to help defend against headline-making allegations.
Whistleblower and False Claims Act: Companies and their boards have relied on us to respond to allegations by whistleblowers and to help them devise and implement corporate whistleblower policies. Clients seek our counsel on whistleblower matters in a broad range of sectors—including defense, healthcare, technology and financial services.
Anti-Discrimination and DEI Advisory: Our practice is dedicated to providing comprehensive legal counsel and strategic guidance on matters relating to anti-discrimination laws and diversity, equity, and inclusion (DEI) initiatives. Our areas of focus include workplace investigations, litigation, legal compliance, culture and equity reviews, strategic counseling and training and education.
Antitrust and Trade Regulation: Clients turn to us for our record of success in handling high-stakes antitrust disputes, investigations, and achieving regulatory clearance for the largest and most complicated transactions. We advise clients on internal investigations, enforcement matters, and regulatory issues in connection with the OFAC, the Department of State, and the SEC.
Appellate: Our clients appreciate that Simpson Thacher is a formidable force in the appellate arena. They turn to us for our reputation for procuring against the odds, law-defining appellate rulings across a wide range of areas, including class actions, commercial, securities litigation, and pro bono.
Asset Management Litigation: Our team advises the world’s largest and most sophisticated investment managers and advisers on complex, high-stakes disputes and handles fund civil litigation, including litigation in federal and state courts, before arbitration tribunals, and in other forums across the globe. Our clients benefit from our extensive experience in the asset management industry where we take a holistic view in advising clients on their legal, regulatory, and compliance considerations. We also routinely advise on the potential for resolution of out-of-court disputes.
Asset Management Regulatory and Enforcement: Our team includes attorneys with decades of experience in the funds industry, former senior government officials from the SEC, and former U.S. federal prosecutors, who draw upon their deep experience and institutional knowledge to provide sophisticated advice to clients on a broad spectrum of critical regulatory and compliance issues.
Bankruptcy Litigation: Our comprehensive practice covers all aspects of bankruptcy-related litigation–from disputes over plan confirmation to tender liability and equitable subordination claims to issues arising out of insurance disputes and mass tort-related bankruptcies.
ERISA Litigation: Clients benefit from our coordinated advice in closely aligned areas, including securities, bankruptcy, and government investigations, and our ability to present arguments and evidence in the manner best suited to advance business interests and resolve conflicts with minimal disruption to their operations.
False Advertising Litigation: Companies in a broad range of fields, including pharmaceuticals, financial services, consumer products and food and beverage, turn to us for our significant experience in false advertising litigation, including disputes between competitors and consumer class actions, as well as for ongoing regulatory guidance.
Government and Internal Investigations: Large and small companies and their boards, audit and special committees, officers and directors, and other individuals regularly turn to us for advice on a wide range of criminal, regulatory, congressional and other sensitive government inquiries and internal investigations.
Insurance and Reinsurance: Clients benefit from our experience as the leading firm representing the interests of both ceding companies and reinsurers in litigations and arbitrations throughout the United States, the United Kingdom and Bermuda. Major insurance groups, including Travelers, AIG, Berkshire Hathaway, Lloyd’s of London and CNA have trusted us on their most significant matters.
Intellectual Property Litigation: Understanding and protecting IP is crucial to the long-term success of many businesses. Clients seek our advice in high-stakes, “make it or break it” disputes and rely on our broad array of substantive experience in both litigation and transactional matters to help them protect their interests. We unite sophisticated litigation skills with a deep understanding of all types of intellectual property, including patents, copyrights, trade secrets and proprietary data, software, and trademarks.
International Disputes and Arbitration: We handle high-stakes international disputes and commercial crises, where the outcome is uncertain and our clients need the highest quality of service. Our collaborative team operates worldwide from the Firm’s London office. The scope of our practice from the London office reaches across all of North and South America, Europe, the Middle East and Asia-Pacific.
International Regulatory and Compliance: With increased activism and cross-border cooperation between enforcement and regulatory agencies, we represent the interests of a wide array of clients operating in multiple jurisdictions and have advised on issues in China, India, Eastern Europe, the Middle East, Latin America and Africa.
Mergers and Acquisitions Litigation: Clients seek our market-leading advice in all aspects of M&A litigation—where we excel at defending challenges to the largest and most complex mergers and acquisitions. They appreciate our extensive experience defeating efforts to enjoin transactions prior to closing; resolving claims through reasonable settlements pre-closing; and litigating claims for damages post-closing.
Privacy and Cybersecurity: Our multidisciplinary Privacy and Cybersecurity team advises global companies facing heightened regulatory, contractual and consumer obligations surrounding the management of data, including personal data and use of AI.
Product Liability and Mass Tort: Since the 1970s, clients have relied on our advice as a leader in the development of product liability and mass tort law in the United States. We have taken countless product liability and mass tort cases to jury trial in state and federal courts over the years, amassing invaluable courtroom experience.
Securities: For decades, clients have relied on our securities litigators in the most complex, high-profile, high-stakes securities matters of the day. The country’s most respected Fortune 500 corporations and financial institutions turn to us to help defend against headline-making allegations.
Whistleblower and False Claims Act: Companies and their boards have relied on us to respond to allegations by whistleblowers and to help them devise and implement corporate whistleblower policies. Clients seek our counsel on whistleblower matters in a broad range of sectors—including defense, healthcare, technology and financial services.
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WilmerHale is a leading, full-service international law firm with more than 1,200 lawyers located throughout 12 offices in the United States and Europe. The firm's lawyers work at the intersection of government, technology and business, and are committed to guiding principles of:
Our lawyers have played an integral role in many of the most significant cases across the globe over the past several years, including internal and governmental investigations; patent, copyright and trademark cases; regulatory, government and public policy disputes; securities class action lawsuits; and federal and state appellate cases. Clients rely on our strong understanding of their industries and business goals, pragmatic and clear advice—even in the midst of complicated issues, complex legal and regulatory regimes, and high-stakes decisions—and ability to deliver practical solutions to real-world problems. Our cases and achievements cut across the litigation spectrum, and we have experience across industries, including aviation; bankruptcy and commercial; communications; defense and national security; government contracts; energy, environment and natural resources; financial institutions; labor and employment; technology; and trade. Learn more about our litigation practices at https://www.wilmerhale.com/en/solutions/litigation.
- providing quality, world-class legal and client services;
- promoting a culture of opportunity and inclusiveness;
- fostering an environment that promotes an entrepreneurial spirit, collaboration and collegiality by drawing on the exceptional talents and varied experience of our lawyers;
- encouraging lawyers and staff to perform public service and give back to the community through pro bono work, government service, service to the bar, teaching, and supporting public institutions and charitable organizations; and
- hiring and retaining exceptionally talented lawyers who possess the common trait of outstanding academic and personal achievements.
Our lawyers have played an integral role in many of the most significant cases across the globe over the past several years, including internal and governmental investigations; patent, copyright and trademark cases; regulatory, government and public policy disputes; securities class action lawsuits; and federal and state appellate cases. Clients rely on our strong understanding of their industries and business goals, pragmatic and clear advice—even in the midst of complicated issues, complex legal and regulatory regimes, and high-stakes decisions—and ability to deliver practical solutions to real-world problems. Our cases and achievements cut across the litigation spectrum, and we have experience across industries, including aviation; bankruptcy and commercial; communications; defense and national security; government contracts; energy, environment and natural resources; financial institutions; labor and employment; technology; and trade. Learn more about our litigation practices at https://www.wilmerhale.com/en/solutions/litigation.
