Education:

• Hamilton College
• Fordham University of Law
• Cornell University, Women’s Entrepreneurship

Bar affiliations & court admissions: 

• Bar of the State of New York
• Bar of the State of New Jersey
• U.S. Courts of Appeals for the First, Second, and Third Circuit
• U.S. District Courts for the Southern and Eastern Districts of New York and the District of New Jersey

Ariana J. Tadler joined Kaplan Fox as Of Counsel in July 2025; she is resident in the firm’s New York office. Ariana began her legal career with Kaplan Fox in 1992; she is pleased to have “returned home” to work with the Kaplan Fox team, with whom she has co-counseled noteworthy matters while managing her own firms, including Tadler Law LLP, a WBENC-certified, women-owned boutique law firm, established in 2019.

With 32 years’ experience advocating for consumers, employees, and investors against corporate fraud and abuse while litigating and managing securities, consumer and data breach class actions, and complex litigation and arbitrations, Ariana is one of the leading women litigators in the country. Described by Chambers USA as one who “passionately defends her clients’ interests to the greatest extent possible,” Ariana litigates large, complex, high-profile cases as well as smaller, impactful matters. She is sought after for her unique legal and technological acumen and case management skills.

Ariana is renowned for being “gracious and tenacious.” A tough, solution-driven negotiator with a creative and robust aptitude for resolving disputes, Ariana is regularly retained by clients and appointed by courts to leadership positions in large, complex federal, multi-district, and state coordinated proceedings because of her extensive experience managing complex litigation. Ariana is also recognized as one of the nation’s leading authorities on electronic discovery and pioneered the establishment of an eDiscovery Practice group within a plaintiffs’ firm structure 20+ years ago. Her exceptional skills and knowledge in the field of eDiscovery have distinguished her among her litigation peers. She remains the only plaintiffs’ lawyer to be ranked repeatedly as a Band 1 eDiscovery Practitioner by Chambers and Partners in the Global-USA and USA-Nationwide categories, an unprecedented achievement. In 2024 and 2025, Ariana received a Star Ranking for eDiscovery from Chambers and Partners, making her one of only three people and the only woman to have ever received this distinction. In 2023, Ariana received the 2023 Honorable Shira Scheindlin Lifetime Achievement Award. In 2024, Ariana became the Co-Vice President of Women Owned Law.

Ariana has also been recognized repeatedly by Martindale Hubbell (AV Preeminent Rating); Lawdragon (500 Leading Plaintiff Financial Lawyers); Super Lawyers (Top 50: Women in New York – Metro Super Lawyers; and Top 100: New York – Metro Super Lawyers); Best Lawyers (Mass Tort Litigation/Class Actions – Plaintiffs); and Long Island Lawyer of the Year – Mass Torl Litigation/Class Actions – Plaintiffs) and Who’s Who Legal (Litigation).

Ariana was a Founding Principal and served as a consultant to Meta-e Discovery LLP, an independent data hosting management and consulting company. In March 2023, Repario Data LLC was created and includes the integration of Meta-e Discovery with other service providers to fulfill the EDRM cycle; Ms. Tadler has a limited equity interest in Repario Data and provides certain consulting and business development services from which she may generate income.

In 2017, United States Supreme Court Chief Justice Roberts appointed Ariana to serve on the Federal Civil Rules Advisory Committee. After serving two three-year terms, in July 2023, Chief Justice Roberts renewed Ariana’s appointment to serve for an additional year, which expired in October 2024. By the Committee Chair’s appointment, she served on subcommittees focused on specific aspects of the federal civil rules, including Multidistrict Litigation (MDL) and Discovery.

Ariana is an author and a paid professional and keynote speaker.  She writes and speaks on an array of topics stemming from her decades of experience as a lawyer, entrepreneur, founding partner, business owner, woman in tech, mentor, and mother. Ariana is an active member of the New York City Chapter of the National Speakers’ Association and is currently writing a book on work-life integration based on a philosophy she developed to live an effective, productive, and abundant life geared to mentoring and developing the next generation of leaders.

Ariana is a proud graduate of Hamilton College and Fordham University’s School of Law. An avid learner, Ariana achieved a certificate in Women’s Entrepreneurship from Cornell University in March 2022.