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2.20.26
Wilson Sonsini Prevails in Blockbuster U.S. Supreme Court Case: V.O.S. Selections, Inc. v. Trump
In a case closely watched by corporate America and indeed the entire world, the U.S. Supreme Court affirmed a Federal Circuit ruling in favor of five small business clients, confirming that the International Economic Emergency Powers Act (IEEPA) does not authorize the President of the United States to impose the “Liberation Day” trade deficit tariffs announced in April 2025 and since revised on multiple occasions.
News Articles
9.04.25
Wilson Sonsini Named 2025 Appellate Hot List Finalist by The National Law Journal
On September 4, 2025, Wilson Sonsini was selected among the finalists for the “Appellate Hot List” during The National Law Journal’s 2025 Legal Awards, which highlight the top litigation and appellate work from the previous year. All of the honorees and finalists will be celebrated at an awards dinner in D.C. on November 5.
Alerts
6.11.25
Labcorp v. Davis Challenge Regarding Uninjured Class Members Dismissed as Improvidently Granted
In a closely watched case with major implications for class action litigation, the U.S. Supreme Court sidestepped a long-simmering legal question: Can a class be certified if it includes members who suffered no injury? On June 5, 2025, by a vote of 8-1, the Court dismissed Labcorp v. Davis as improvidently granted, leaving unresolved a longstanding circuit split on the issue. But while the dismissal frustrates those hoping for clarity, both the oral argument and Justice Brett Kavanaugh’s pointed dissent reveal a Court still keenly interested in the issue—and likely waiting for a cleaner vehicle to address it.
News Articles
10.23.24
Mark Yohalem Elected to the American Academy of Appellate Lawyers
Wilson Sonsini litigation partner Mark Yohalem was elected as a member of the American Academy of Appellate Lawyers at the Academy’s recent board of directors meeting.
The American Academy of Appellate Lawyers was founded in 1990 to recognize outstanding appellate lawyers and promote the improvement of appellate advocacy and the administration of the appellate courts. Academy membership is limited to 500 members in the United States and is open only to those who possess a reputation of recognized distinction as an appellate lawyer. Candidates for membership must be nominated and seconded by current Academy Fellows, reviewed and recommended by a Membership Screening Committee, and elected at an Academy board of directors meeting.
Mark’s reputation as an appellate specialist has previously been recognized by the California Academy of Appellate Lawyers (to which he was inducted in 2022) and Chambers USA, in which he is highly ranked. Clients surveyed by Chambers recognized that Mark “truly excels in storytelling and advocacy” and is “wonderful strategically” and “incredibly smart,” with “the rare ability to convert brilliant analysis of extremely complex business cases into clear and simply stated briefs and oral arguments.” He has argued more than 50 appeals in federal and state court, twice before en banc panels of the Ninth Circuit. Before entering private practice, he served as the Deputy Chief of Appeals at the U.S. Attorney’s Office for the Central District of California, and as a law clerk to Justice Anthony M. Kennedy of the U.S. Supreme Court and Judge Pamela Ann Rymer of the Ninth Circuit.
For more information about the American Academy of Appellate Lawyers, please click here.
The American Academy of Appellate Lawyers was founded in 1990 to recognize outstanding appellate lawyers and promote the improvement of appellate advocacy and the administration of the appellate courts. Academy membership is limited to 500 members in the United States and is open only to those who possess a reputation of recognized distinction as an appellate lawyer. Candidates for membership must be nominated and seconded by current Academy Fellows, reviewed and recommended by a Membership Screening Committee, and elected at an Academy board of directors meeting.
Mark’s reputation as an appellate specialist has previously been recognized by the California Academy of Appellate Lawyers (to which he was inducted in 2022) and Chambers USA, in which he is highly ranked. Clients surveyed by Chambers recognized that Mark “truly excels in storytelling and advocacy” and is “wonderful strategically” and “incredibly smart,” with “the rare ability to convert brilliant analysis of extremely complex business cases into clear and simply stated briefs and oral arguments.” He has argued more than 50 appeals in federal and state court, twice before en banc panels of the Ninth Circuit. Before entering private practice, he served as the Deputy Chief of Appeals at the U.S. Attorney’s Office for the Central District of California, and as a law clerk to Justice Anthony M. Kennedy of the U.S. Supreme Court and Judge Pamela Ann Rymer of the Ninth Circuit.
For more information about the American Academy of Appellate Lawyers, please click here.
News Articles
8.28.24
Firm Named 2024 Appellate Hot List Finalist by The National Law Journal
On August 22, 2024, Wilson Sonsini was named among the 2024 Appellate Hot List finalists for The National Law Journal Legal Awards, highlighting the top litigation and appellate work from the previous year. The law firms and attorneys recognized this year are noted for their work guiding clients through high-stakes litigation, their cutting-edge approaches to environmental, social, and corporate governance issues, as well as their diversity and inclusion initiatives. Over the past year, our litigation department has secured important victories for entertainment, technology, and life sciences clients, including Fox Corporation, Google, Hulu and Disney+, iRhythm Technologies, Pinterest, Roblox, and Standard BioTools. Winners will be announced during an awards event in Washington, D.C., in October.
Alerts
7.08.24
"Chevron is overruled": How Loper Bright Will Change the Regulatory Law Landscape
In a decision with far-ranging implications for federal administrative law, the United States Supreme Court issued its long-awaited ruling in Loper Bright Enterprises v. Raimondo (Loper Bright).1 The Supreme Court’s six-Justice majority held that the Administrative Procedure Act (APA) requires courts interpreting agency regulations to determine independently whether the agencies have acted within their statutory authority, even where the statute at issue is ambiguous. In so holding, the Court overruled its 1984 decision in Chevron USA v. Natural Resources Defense Council, which for the last four decades had governed thousands of cases involving federal agency interpretations of ambiguous laws.
Client Highlights
7.08.24
Wilson Sonsini Advises Computer & Communications Industry Association in Landmark Case Impacting Internet Free Speech Rights
On July 1, 2024, the U.S. Supreme Court decided Moody v. NetChoice, LLC and NetChoice, LLC v. Paxton, marking a significant development in the realm of internet regulation and reinforcing the application of longstanding First Amendment principles to the online world. The cases centered around state laws enacted in 2021 by Florida and Texas, both of which target large social media platforms and internet companies. The laws aim to limit platforms' control over content moderation, including filtering and labeling user-generated content, and mandated detailed explanations for content removal or alteration.
Client Highlights
8.18.23
Firm Secures Federal Circuit Affirmance of PTAB Victory for Palette Life Sciences
On August 16, 2023, the U.S. Court of Appeals for the Federal Circuit affirmed a Wilson Sonsini Goodrich & Rosati victory for Palette Life Sciences, Inc. against two medical-device patents. Palette provides injectable, biodegradable spacers for protecting non-target organs from radiation treatments. Wilson Sonsini successfully challenged the two broad Incept LLC patents at the Patent Trial and Appeal Board (PTAB) on both anticipation and obviousness grounds. Incept appealed both decisions, challenging the anticipation and obviousness analyses, including arguments on teaching away and commercial success. At the Federal Circuit, Judge Schall (joined by Judge Taranto) affirmed the PTAB’s decisions, with a partial dissent from Judge Newman, who would have remanded some of the claims for further consideration by the PTAB. With this win, more cancer patients will have access to this important protective technology.
Wilson Sonsini partner T.O. Kong argued the case at the PTAB and the Federal Circuit, with support from Tasha Thomas, Lori Westin, Rick Torczon, Kathryn Robinson, and Robyn Moriarty.
Wilson Sonsini partner T.O. Kong argued the case at the PTAB and the Federal Circuit, with support from Tasha Thomas, Lori Westin, Rick Torczon, Kathryn Robinson, and Robyn Moriarty.
Client Highlights
3.03.23
Wilson Sonsini Secures Fourth Circuit Securities Litigation Victory for MacroGenics and Its Executives
On March 2, 2023, the Fourth Circuit affirmed dismissal of a securities class action filed against Wilson Sonsini clients MacroGenics, Inc. and its CEO and CFO. The complaint concerned statements made by the defendants regarding the results of MacroGenics’ Phase III clinical trial of a therapeutic used to treat patients with late-stage metastatic breast cancer. The plaintiff alleged that the defendants made misleading statements by disclosing that the clinical trial met one of its primary endpoints (“progression free survival”), but not simultaneously disclosing data regarding another still accruing endpoint (“overall survival”) and stating that overall survival showed a “preliminary positive trend.” In September 2021, Judge Hazel of the U.S. District Court for the District of Maryland dismissed the complaint with prejudice, finding that the plaintiff failed to plead any actionable misrepresentation or omission and the allegations failed to raise a strong inference of scienter.
Press Releases
11.18.22
Constandinos (Deno) Himonas Inducted Into the Warren E. Burger Society
The National Center for State Courts (NCSC) has inducted Wilson Sonsini Goodrich & Rosati partner Constandinos (Deno) Himonas into the organization’s Warren E. Burger Society. The society is designed to honor individuals who have used their time, talent, and support to advance the organization in exceptional ways.