Ariana J. Tadler

Phone: 212-946-9453
B.A., Hamilton College, 1989
J.D., Fordham University School of Law, 1992
New Jersey, 1992, New York, 1993
"Working for consumers and investors who have suffered a financial loss or wrong has been very appealing to me. Doing what I can to rectify some of the inequities in the lives of individuals or groups of people is gratifying, particularly in very large, complex cases . . . . I also enjoy cases that are not just about the recovery of monies lost but that also play a role in changing practices that companies engage in that are unfair to consumers and investors.” —Ariana J. Tadler, Lawdragon 500

Ariana Tadler, Managing Partner at Milberg Tadler Phillips Grossman LLP, has 25+ years of experience litigating and managing complex securities and consumer class actions, including high profile, fast-paced cases and, most recently, widely publicized data breach litigations. Ms. Tadler is recognized as one of the nation’s leading authorities on electronic discovery, and pioneered the establishment of an E-Discovery Practice group within a plaintiffs’ firm structure more than 15 years ago. Ms. Tadler was recently appointed by United States Supreme Court Chief Justice Roberts to serve on the Federal Civil Rules Advisory Committee. Additionally, she has been appointed by Committee Chair, Judge John D. Bates, to the subcommittee tasked with reviewing and considering potential civil rules for multidistrict litigation (MDL) cases.

Ms. Tadler is described in Chambers USA 2017 as “a leading light in the plaintiffs’ Bar for e-discovery work, with interviewees labeling her ‘a vigorous opponent and very effective advocate because she has credibility with judges.’” She is frequently called upon for high-stakes litigation matters, with recent experience in a range of data breach, consumer and securities disputes. Sources also reported that “‘she is definitely a thought leader’ who ‘understands the technical issues and the language involved’ and is ‘a good statesman for the plaintiffs’ Bar because she's respected by the defense Bar.’” In 2018, Chambers USA reported: “The ‘very knowledgeable and experienced’ Ariana Tadler is regarded as a luminary of the plaintiffs' Bar. She draws plaudits for her shaping of the wider theoretical boundaries of the e-discovery field, particularly in the capacity of contributor to the Civil Rules Advisory Committee.”

An AV® Preeminent rated (Martindale Hubbell’s highest rating) lawyer, Ms. Tadler continues to be recognized for her litigation prowess by prominent legal industry rating organizations. Ms. Tadler’s recent accolades include Band 1 (highest) recognition by Chambers and Partners for E-Discovery (2017); selection by Super Lawyers 2017 “Top 100 Lawyers in New York Metro Area”; Super Lawyers 2017 “Top 50 Women Lawyers in New York Metro Area”; and Who’s Who Legal Litigation: Leading Practitioner-E-Discovery (2017). The Legal 500 2016 rankings stated: “‘Consummate professional’ Ariana Tadler, who leads the E-Discovery unit [of Milberg LLP], is ‘exceptional, clear and forceful, a giant in her field’ … ‘able to navigate technical discovery issues at a very high level.’”

  • Plaintiffs’ Executive Committee, In re: Yahoo! Inc. Customer Data Breach Security Litigation. Ms. Tadler is one of five court-appointed members of the Plaintiffs’ Executive Committee in the Yahoo! data breach litigation, a class action arising from a breach affecting more than 3 billion Yahoo! user accounts. The firm’s team, under Ms. Tadler’s direction, is primarily responsible for the massive and complex discovery in the case. To date, the Milberg team has taken the lead in drafting extensive formal requests for Production of Documents, as well as negotiating a series of discovery-related orders entered by the Court, including a protective order, E-Discovery protocol, “Rule 502” order governing the inadvertent production of privileged materials, and ESI Search Protocol. Milberg is supervising the ongoing review of case documents, applying advanced technological tools to facilitate efficient review.
  • Plaintiffs’ Steering Committee, In re Target Corporation Customer Data Security Breach Litigation. Representing consumers in a class action accusing Target Corp. of failing to protect customers from a massive data breach during the holiday shopping season. ($10 million settlement; appeal pending).
  • Plaintiffs’ Executive Committee, In re Intuit Data Litigation. Appointed to the Plaintiffs’ Executive Committee in a class action alleging that Intuit failed to take adequate measures to prevent fraudulent tax return filings through the popular TurboTax program, Ms. Tadler was instrumental in the negotiation of an ESI Protocol and other agreements on the parameters of discovery, and continues to play an influential role in the ongoing litigation.
  • Plaintiffs’ Counsel, Torres, et al., v. Wendy’s International LLC. Representing consumers in a class action accusing Wendy’s of failing to protect customers from a massive data breach occurring via point of sales systems at more than 1,000 of its franchised restaurants.
  • Lead Counsel, In re ConAgra Foods, Inc. and In re General Mills, Inc. Kix Cereal Litigation. Representing classes of consumers in cases involving the alleged misrepresentation of GMO food products as “all natural”; the cases involve front-line legal issues, cutting-edge discovery negotiations and complex disputes and motions.
  • Plaintiffs’ Co-Lead Counsel, In re ARIAD Pharmaceuticals Securities Litigation. Representing investors in a securities fraud class action accusing ARIAD of making materially false and misleading statements regarding the safety and potential success of the company’s proprietary chronic myeloid leukemia drug, despite knowledge that patients in company-sponsored clinical trials were suffering an array of dangerous side effects that risked patient safety and impacted the likelihood that the drug would receive FDA approval. ($3.5 million settlement pending court approval).
  • Lead Counsel, Ener1 v. PricewaterhouseCoopers. Represented an alternative energy company in its claims of negligence against one of the Big 4 accounting firms. Case settled on confidential terms.
  • Special Discovery Counsel, Republic of Colombia, et al. v. Diageo North America, Inc. Represented the government of Colombia, serving as Special Discovery Counsel, in its pursuit of claims alleging smuggling and illegal sales of alcohol by several international companies for violation of United States RICO statutes and other common law claims. Engagement encompassed identifying relevant information responsive to defendants’ requests, confirming and guiding preservation practices, and interviewing and collecting data from more than 100 custodians in 23 Colombian Departments (Colombia’s equivalent to our States in the U.S.). Team also reviewed and produced data in the ongoing litigation, and was tasked with ensuring compliance with the various privacy laws of Colombia and the United States with regard to personal data, controlled data and the transfer of sensitive information — all hot topics in the area of E-Discovery today.
  • Plaintiffs’ Liaison Counsel (court-appointed), Lead Counsel and Executive Committee Member, Initial Public Offering Securities Litigation. Represented investors in 300+ securities class actions alleging a market manipulation scheme involving hundreds of initial public offerings and 55 prominent defendant investment banks. Through aggressive litigation, plaintiffs’ counsel obtained a settlement totaling $586 million. This case is notable for the unique strategies that were employed to manage this mammoth litigation. Milberg was at the forefront of dealing with complex discovery issues and crafted innovative tools to streamline the process. As a member of the court-appointed Plaintiffs’ Executive Committee, and as a court-appointed liaison counsel, Ms. Tadler oversaw the efforts of approximately 60 plaintiffs’ firms in combating some of the most well-respected defense firms in the nation. The case was so large and included such extensive discovery that it required its own off-site headquarters, including approximately 100 personnel from various firms dedicated solely to the prosecution of the matter and supervised and managed, in substantial part, by Milberg personnel.
  • Lead Counsel, In re MicroStrategy Securities Litigation. One of three cases litigated in the Eastern District of Virginia (a/k/a the “Rocket Docket”) in less than four years. Negotiated settlements valued at more than $150 million.

  • Martindale Hubbell AV® Preeminent (highest rating)
  • American Bar Association’s Legal Technology Resource Center’s (LTRC) Women of Legal Tech (2017)
  • Super Lawyers “Top 100 Overall Lawyer in New York City” (2017)
  • Super Lawyers (2010-2017)
  • Chambers USA: Nationwide, Litigation: E-Discovery (2015-2017)
  • Chambers Global Guide: Leading Lawyers in E-Discovery (2015-2016)
  • Who’s Who Legal Litigation: Leading Practitioner-E-Discovery (2015-2016)
  • Benchmark Litigation: Star (2015)
  • Super Lawyers “Top 50 Women Attorneys in New York Metro Area” (2014-2017)
  • Benchmark Top 250 Women Litigators (2014)
  • ALM: 2014 Women Leaders in the Law (2014)
  • Chambers USA: America’s Leading Lawyers for Business (2014)
  • Benchmark Plaintiffs Litigation: New York Litigation Star (2011-2014)
  • Lawdragon 500 (2009-13)
  • Fellow of the Litigation Counsel of America

  • American Association for Justice, Leaders Forum
  • American Bar Association, Member
  • American Bar Foundation, Life Fellow
  • American Constitution Society for Law and Policy, Member
  • Bloomberg Law Litigation Innovation Board, Member
  • Federal Bar Council, Member
  • Fordham Law Small to Midsize Law Firm, Advisory Council
  • Georgetown University Law Center Advanced E-Discovery Institute, Advisory Board Member
  • MFY Legal Services Inc., Past Chair (2008-2010), Board Member
  • National Association of Consumer Advocates, Working Member
  • The National Association of Consumer Advocates, Member
  • New York State Bar Association, Member
  • New York Women’s Bar Association, Member
  • Pound Civil Justice Institute, Member Fellow
  • Seventh Circuit, Electronic Discovery Pilot Program
  • The New York Inn of Court, Vice President (term 2016-2019)
  • The Sedona Conference® (the leading “think-tank” on e-discovery), Board of Directors (2013-2017); Chair Emeritus (and Past Chair, 2007-2012), Steering Committee for Working Group 1 on Electronic Document Retention and Production
  • Women's Bar Association of the State of New York, Member
  • Women To Know, Advisory Board

  • Presenter, “The Great Debate: In re Fried Chicken, Order of Special Master Regarding ESI Search Methodologies,” Georgetown Law CLE: 2018 Advanced eDiscovery Institute (“AEDI”), November 15, 2018.
  • Presenter, “Crafting the 30(b)(6) Notice,” AAJ: Advanced 30(b) Seminar: The Most Powerful and Underutilized Tool, November 7, 2018.
  • Presenter, “Big Challenges in the City of Big Shoulders.” Electronic Discovery’s Rise to Prominence,” American Bar Association: 2018 National Institute on Class Actions Agenda, October 18, 2018.
  • Presenter, “Discovery in the Digital Age,” Advocacy Track: Using Critical Thinking to Develop Your Discovery Plan, AAJ 2018 Annual Convention, July 2018.
  • Presenter, “May it Please the Court: Winning Arguments Before a Judge With Little or no ESI Experience,” e-Discovery for Trial Lawyers, State Bar of Georgia, June 2018.
  • Presenter, “If You Must: Getting the Most from Search Terms While Preventing the Opposition From Hiding the Ball,” e-Discovery for Trial Lawyers, State Bar of Georgia, June 2018.
  • Presenter, “The Critical Importance of the Rule 26 Conference or its Equivalent: What You Must Do,” e-Discovery for Trial Lawyers, State Bar of Georgia, June 2018.
  • Presenter, “They’ve Been Served: What Should Go Out with Your Complaint and How to Handle the Initial Stages of Your Lawsuit,” e-Discovery for Trial Lawyers, State Bar of Georgia, June 2018
  • Presenter, “The Importance of e-Discovery in Your Practice,” e-Discovery for Trial Lawyers, State Bar of Georgia, June 20128.
  • Presenter, “Current Defense Tactics to Challenge Class Representatives and Class Counsel,” Consumer Attorneys of California: Class Actions and Mass Torts, June 2018.
  • Presenter, “30(b)(6) Corporate Depositions,” American Association for Justice: New Lawyers’ Division, May 2018.
  • Presenter, “Discovery Under (26)(b)(1): Proportionality,” HB Litigation: Class Action Mastery, May 2018.
  • Presenter, “Best Practices for Handling Massive Troves of Sensitive Data,” Mass Torts Judicial Forum with the Hon. Marina Corodemus (ret.) - Cybersecurity in Mass Tort Cases, April 2018.
  • Presenter, Electronic Discovery for the Plaintiffs’ Class Action Lawyer,” 360 Advocacy: Class Action Roundtable, April 2018.
  • Presenter, “Theories for Presenting Class Actions in the Opioid Litigation,” Harris Martin: Opioid Conference, March 2018.
  • Presenter, “Current Class Action Landscape in Opioids Multidistrict Litigation,” HB Litigation: Opioid Crisis – Claims, Damages & Science, January 2018.
  • Presenter, “Class Treatment: Can These Claims be Resolved as a Class Action?” American Association for Justice: Opioid Litigation Seminar, September 2017.
  • Presenter, “Are You Going to Eat That? Issues, Hurdles and Opportunities in Food and Supplement Litigation,” 26th Annual Spring CLE Meeting for the American Bar Association Tort and Insurance Practice Section (TIPS), Toxic Torts and Environmental Law Committee, April 2017.