ARIANA J. TADLER is the founding partner of Tadler Law LLP, a WBENC-certified, women-owned boutique law firm that offers an array of litigation and legal counseling services. With over 30 years of experience advocating for consumers, employees, and investors in high-stakes litigation against corporate fraud and abuse, Ariana is a nationally recognized leader in complex litigation. She has successfully litigated and managed securities, consumer, and data breach class actions and applies her strategic advocacy in both litigation and arbitration, earning a reputation as one of the country’s top women litigators. 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 managing teams and 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. 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 continues to earn top recognition as a Band 1 eDiscovery Practitioner by Chambers and Partners in both the Global-USA and USA-Nationwide categories, a remarkable achievement. In 2024 and 2025, Ariana received a Star Ranking for eDiscovery from Chambers and Partners in their Global Guide, 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.

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 was established and includes the integration of Meta-e Discovery with several other service providers.