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  1. Professionals

Michelle D. Tuma

Associate

New York

+1 212-294-3284

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  • Overview
  • Experience
  • Credentials
  • Insights & News

Michelle is a senior litigation associate with significant experience handling high stakes federal securities class actions, M&A related disputes, and other complex commercial litigation.

Michelle is a member of the Firm’s Chambers‑USA–ranked Securities Litigation Group. Her practice focuses on the defense of public companies across a range of industries in securities class actions, as well as advising clients in pre‑ and post‑closing M&A disputes, shareholder derivative actions, board‑level investigations, and other corporate governance matters. She regularly represents clients through all phases of litigation, including case initiation, discovery, class certification, dispositive motion practice, and trial—at both the state and federal level.

In addition to her commercial litigation practice, Michelle maintains an active pro bono practice. She is a member of the Firm’s Pro Bono Committee and is the recipient of the Legal Aid Society’s Pro Bono Publico Award. This focus is exemplified by her role on the Orellana trial team, which recently secured a multi‑million‑dollar jury verdict in a federal civil rights action. Michelle served as trial counsel in that matter and argued critical motions before both the district court and at the Second Circuit.

Michelle serves as the associate liaison for WinstonPride and the Women’s Leadership Initiative for the New York office.

During law school, Michelle interned for both the Hon. Paul G. Gardephe of the U.S. District Court for the Southern District of New York and the Hon. Cathy L. Waldor of the U.S. District Court for the District of New Jersey. She also worked in the Cybercrimes & Identity Theft Bureau of the Manhattan District Attorney's Office.

Prior to law school, Michelle worked at the Illinois Innocence Project for four years.

Recent Experience

Precision Aviation Group - Acquisition of Helicopter Engine Repair Overhaul Services
Representing Chuy’s Holdings in its US$605M Sale to Darden Restaurants
Winston Wins Unanimous Supreme Court Case Clarifying Securities Fraud Liability
Secured Settlement for Fox on Brink of Trial in High-Profile Defamation Litigation Brought by US Dominion Voting Systems
Stellex Capital Management's Acquisition of Go To Logistics
Stellex Capital Management Acquisition of Country Fresh

  • The Best Lawyers: Ones to Watch®in America—Recognized for Antitrust Litigation (2026) and Securities Litigation (2025-2026)

 

Capabilities

Antitrust/Competition
White Collar & Government Investigations
Securities, M&A & Corporate Governance Litigation
Cryptocurrencies, Digital Assets & Blockchain Technology
Financial Services

Recent Experience

Precision Aviation Group - Acquisition of Helicopter Engine Repair Overhaul Services
Representing Chuy’s Holdings in its US$605M Sale to Darden Restaurants
Winston Wins Unanimous Supreme Court Case Clarifying Securities Fraud Liability
Secured Settlement for Fox on Brink of Trial in High-Profile Defamation Litigation Brought by US Dominion Voting Systems
Stellex Capital Management's Acquisition of Go To Logistics
Stellex Capital Management Acquisition of Country Fresh

Credentials

Education

Michelle received her J.D., magna cum laude, from Fordham University School of Law and her B.A., summa cum laude, in political science & legal studies, from the University of Illinois-Springfield.

    Admissions
    • New Jersey
    • New York

    Related Insights & News

    • "Race, Crime, and the Public's Sentencing Preferences," Public Opinion Quarterly, Co-author, June 2022
    • "Stare Decisis and the Electoral Connection: Do Retention Systems Affect Judges' Deference to Precedent?," State Politics and Policy Quarterly, Co-author, Nov. 2019
    • "Revisiting Roll-Off in Alerted Optical Scan Precincts: Evidence from Illinois General Elections," Election Law Journal, Co-author, Oct. 2015
    Recognitions

    Winston Pro Bono Team Recognized in Litigator of the Week Column by The Am Law Litigation Daily

    November 14, 2025

    Pro Bono In Action
    Winston Wins $112 Million Verdict for Immigrants Unlawfully Held by Suffolk County Sheriff’s Office

    November 12, 2025

    Recognitions
    Winston Attorneys Recognized in Best Lawyers: Ones to Watch® in America 2026

    August 21, 2025

    Pro Bono In Action
    Winston Rebuffs Appeal & Will Pursue Damages for Immigrants Unlawfully Held by Suffolk County

    July 24, 2025

    Pro Bono In Action
    Winston Wins Class Certification for Disabled New Yorkers Unlawfully Subjected to Solitary Confinement

    June 23, 2025

    Recognitions
    Winston Pro Bono Team Led by Aldo Badini Recognized in Litigator of the Week Column

    January 10, 2025

    Pro Bono In Action
    E.D.N.Y. Grants Summary Judgment for Class of Immigrants Unlawfully Held by Suffolk County

    January 6, 2025

    Pro Bono In Action
    Husband and Wife Who Fled Political Persecution in Angola Receive Asylum After 10-Year Legal Battle

    December 17, 2024

    Blog
    Winston Kicks Off Sixth Cohort of D&I Associate Sponsorship Program and Graduates the Class of 2023-2024

    November 25, 2024

    Recognitions

    Winston Attorneys Recognized in Best Lawyers: Ones to Watch® in America 2025

    August 15, 2024

    Blog
    Google Agrees to Scrub Users’ “Incognito” Browsing Data, But is Left with More Litigation

    May 7, 2024

    News
    Winston Team Wipes Out Pure Omission Liability With Unanimous Supreme Court Ruling

    April 15, 2024

    View All Insights & News

    Capabilities

    Antitrust/Competition
    White Collar & Government Investigations
    Securities, M&A & Corporate Governance Litigation
    Cryptocurrencies, Digital Assets & Blockchain Technology
    Financial Services
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