John A. Neuwirth

Chambers USA describes John as an “excellent securities litigator with deep experience in the subject matter” and “a pragmatic and efficient approach,” who “has tremendous judgment,” is “super smart,” “really understands his client’s needs” and “how to achieve the best results,” and as a go-to advisor “not only on strictly legal issues but also highly strategic matters.” Legal 500 ranks John as a “Hall of Fame” lawyer nationwide for both Securities Litigation and M&A Litigation, with clients describing him as “brilliant, the best in the business,” “as good as they come,” “a national leader,” and “at the top of the list for securities cases no matter how big or complicated.” In 2026, John was named by Crain’s as a Notable Leader in Accounting, Consulting & Law. In 2017, he was selected by the National Law Journal as one of 25 “Litigation Trailblazers” nationwide. He is also recognized as one of America’s leading securities litigators by Benchmark Litigation and Best Lawyers in America, and as a “Leading Global Litigator,” “Leading Global Investigations Lawyer,” and “Leading Litigator in America” by Lawdragon 500. Additionally, since 2016, John has been recognized as a “Life Sciences Star” by LMG Life Sciences Guide.

John has litigated many seminal securities, M&A, fiduciary duty, and other corporate disputes that have resulted in judicial decisions that have set or overturned precedent, and has secured his clients complete trial and appellate victories in cases collectively implicating billions of dollars. Some of John’s recent experience includes the representation of:

• Brookfield Asset Management and Brookfield Renewable and their directors and officers in Delaware Court of Chancery and Delaware Supreme Court stockholder class and derivative litigation arising out of Brookfield’s acquisition of TerraForm Power.
• Brookfield Asset Management and its directors and officers in Delaware Court of Chancery and Delaware Supreme Court stockholder class action litigation arising out of Brookfield’s acquisition of GGP.
• Brookfield Asset Management and its directors and officers in Delaware Court of Chancery stockholder class action and appraisal litigation arising out of Brookfield’s acquisition of Rouse.
• AMC Entertainment and its directors and officers in multiple securities class actions, derivative actions, and stockholder class actions in federal district courts, state courts, the Delaware Court of Chancery, and the Delaware Supreme Court.
• Neogen Corporation and its directors and officers in securities class and derivative actions in Michigan federal court, and a securities class action in Minnesota state court.
• Six Flags Entertainment Corporation and its directors and officers in securities class and derivative actions in Ohio federal court.
• The Kroger Co. and its directors and officers in a stockholder derivative action in Ohio state court.
• Dun & Bradstreet and its directors and officers in a Delaware Court of Chancery stockholder class action arising out of its acquisition by Clearlake.
• Willis Towers Watson, Newfront Insurance Holdings, and Newfront’s directors and officers in a Delaware Court of Chancery stockholder class action arising out of Willis Towers Watson’s acquisition of Newfront.
• Willis Towers Watson and its directors and officers in a federal securities class action in Virginia federal court and the Fourth Circuit Court of Appeals, and in a Delaware Court of Chancery stockholder class action.
• Sanofi in multiple federal securities class actions in New York federal court and the Second Circuit Court of Appeals.
• Sanofi in a complex breach of contract action in New York federal court arising out of Sanofi’s acquisition of Genzyme.
• Sanofi and its directors and officers in multiple stockholder class actions in the Delaware Court of Chancery. 
• The Campbell’s Company in a securities class action in New Jersey federal court, and a stockholder class action in New Jersey state court.
• Gores Group SPACs and their directors and officers in multiple stockholder class actions in the Delaware Court of Chancery.
• Churchill Capital Corp. SPACs and their directors and officers in multiple stockholder class actions in the Delaware Court of Chancery.
• Tripadvisor in stockholder class action litigation in the Delaware Court of Chancery and the Delaware Supreme Court.
• Telos Corporation in a federal securities class action in Virginia federal court.
• Voxx International in a federal securities class action in New York federal court.
• American Securities in a stockholder class action in the Delaware Court of Chancery arising out of its acquisition of Foundation Building Materials.
• American Securities in Delaware Court of Chancery appraisal litigation arising out of its acquisition of Air Methods.
• Evercore in a RICO action in New Jersey federal court.
• Fidelity National Financial in an appraisal trial in the Delaware Court of Chancery arising out its acquisition of Lender Processing Services.
• Fidelity National Financial and its directors and officers in a stockholder derivative action in the Delaware Court of Chancery.
• Cannae Holdings and its directors and officers in a stockholder derivative action in the Delaware Court of Chancery.
• Members of a special committee of the board of directors of Agiliti in a stockholder class action in the Delaware Court of Chancery arising out of Agiliti’s acquisition by THL Partners.
• Members of a conflicts committee of the board of directors of Apollo Global Management in a stockholder derivative action in the Delaware Court of Chancery.
• ATI Physical Therapy and its directors and officers in securities class and derivative actions in Illinois federal court.  
• Gentiva Health Services and its directors and officers in securities class and derivative actions in New York federal court and Georgia federal and state court.  

John is graduate of Hamilton College and New York University School of Law, and is a member of the Board of Advisors of the NYU School of Law Institute for Corporate Governance & Finance.