Overview
For Molly Arranz, being a lawyer is about being an advocate. Growing up, she witnessed legal challenges her father faced while he ran his own, small business—issues that resulted from his not finding necessary legal assistance for his company’s needs. Her decision to go to law school stemmed from her desire to address this gap and provide legal support for businesses like the one her father owned.
Molly is the chair of Amundsen Davis’s Cybersecurity & Data Privacy Service Group. She is a certified privacy professional (CIPP-US) and a recognized Privacy Law Specialist by the American Bar Association. With two decades-worth of defending companies in consumer privacy class actions and against a backdrop of emerging data privacy laws, Molly advises companies in all industries regarding compliance with a patchwork of privacy laws and regulations, including: consumer privacy and protection regulations; tracking technology disclosures; consumers’ and employees’ rights to access, limit, correct and delete their data; and state and federally mandated notification, disclosure and consent requirements.
She also advises a range of companies on their incident response protocol and serves as a breach coach for companies of all sizes, including multinational and international companies. She has counseled a global telecommunications software and cloud computing company on compliance issues for its cloud services. She reviews and advises on data protection addendums and agreements.
Molly also chairs the firm’s Class Action Service Group. She has defended more than 150 class actions involving a range of legal theories, including privacy violations, consumer fraud, breach of contract, breach of warranty, breach of confidentiality and misrepresentation. She defends clients in claims arising out of the Federal and State Wiretap Act, the Illinois Biometric Information Privacy Act (BIPA), the Computer Fraud and Abuse Act (CFAA), the Fair Credit Reporting Act (FCRA), the Fair Labor Standards Act (FLSA), the Telephone Consumer Protection Act (TCPA), the Chicago Residential Landlord and Tenant Ordinance (RLTO), CERCLA, the Clean Water Act, and RCRA. She represents a wide variety of companies from small family-owned businesses to Fortune 500 companies.
In her career, Molly has also defended more than 75 mass tort cases involving claims arising from allegations of exposure to asbestos, silica and benzene.
Experience
Membership & Involvement
- Amundsen Davis Executive Committee
- Member: International Association of Privacy Professionals; American Bar Association; Wisconsin Bar Association
- Former Co-Chair: Amundsen Davis Committee for Diversity and Inclusion
Court Admissions: Illinois; Wisconsin; U.S. Court of Appeals Seventh Circuit; U.S. Court of Appeals Eleventh Circuit; U.S. District Court, Central District of Illinois; U.S. District Court, Northern District of Illinois; U.S. District Court, Northern District of Indiana; U.S. District Court, Eastern District of Michigan; U.S. District Court, Western District of Michigan; and, U.S. District Court, Eastern District of Wisconsin.
Pro Hac Vice Admissions: Florida; Indiana; Arizona; District of Columbia; U.S. District Court, District of Connecticut; U.S. District Court, Southern District of Florida; U.S. District Court, Eastern District of Missouri; U.S. District Court, Middle District of North Carolina; and, U.S. District Court, Eastern District of Pennsylvania.
Honors
- Selected to the Illinois Super Lawyers list: 2021, 2022, 2025, 2026
- Selected to the Illinois Super Lawyers "Rising Stars" list: 2011, 2013
- Selected to The Best Lawyers in America® in Mass Tort Litigation / Class Actions - Defendants: 2023
- 2024 Burton Award Recipient: Distinguished Legal Writing
Resources & Insights
In the Media
Alerts
Speaking Engagements
Published Works
Blog Posts
Education on Demand
Join partners Molly Arranz and John Williams for a practical Corporate Risk Management Series session on how to identify and manage AI-related risks across your organization and third-party relationships.
As businesses increasingly rely on third-party vendors and new technologies like AI, data privacy and cybersecurity risks continue to evolve. Poor data hygiene, careless AI use, and weak vendor oversight can open the door to regulatory scrutiny, reputational damage, and costly data breaches. By understanding areas of vulnerability, companies can minimize their exposure.
Join Amundsen Davis’s Cybersecurity & Data Privacy Service Group attorneys Molly Arranz, practice group chair, and John Williams, partner, for a timely Cybersecurity Awareness Month discussion on how to keep your organization safe.
During this presentation Molly Arranz and John Ochoa will review data privacy and security concerns for employers, including concerns related to the Biometric Privacy Act and the Genetic Information Privacy Act. They will review best practices and policies employers should have in place to avoid legal pitfalls.
It is not if, but when. Though construction companies—especially smaller ones—may believe it won’t happen to them, more and more companies have suffered or will suffer a “data incident” or cyber-attack in some form. In 2020, alone, small businesses were targeted 43% of the time, and malicious emails are up 600% due to COVID-19.
The Biometric Illinois Privacy Act (BIPA) was enacted over 12 years ago and many questions are still being battled in court as employers and employees continue to navigate this biometric privacy law.
Firm News
- Congratulations to Amundsen Davis's 2026 Illinois Super Lawyers and Rising Stars!
Congratulations to Amundsen Davis's 2026 Illinois Super Lawyers and Rising Stars!We would like to congratulate the Amundsen Davis attorneys who were included on the 2026 Illinois Super Lawyers® and 2026 Illinois Rising StarsSM lists.
- Congratulations to Amundsen Davis Attorneys Included on 2025 Illinois Super Lawyers and Rising Stars Lists
Congratulations to Amundsen Davis Attorneys Included on 2025 Illinois Super Lawyers and Rising Stars ListsWe are proud to announce that 23 Amundsen Davis attorneys have been included on the 2025 Illinois Super Lawyers® and 2025 Illinois Rising StarsSM lists.
- Corporate Risk Management Series: Managing AI Risk - Shadow AI & Third-Party Exposure
Corporate Risk Management Series: Managing AI Risk - Shadow AI & Third-Party ExposureJoin partners Molly Arranz and John Williams for a practical Corporate Risk Management Series session on how to identify and manage AI-related risks across your organization and third-party relationships.
- Wiretap or Trap and Trace: A Common Data Privacy Claim That May Be Coming Your Way
Wiretap or Trap and Trace: A Common Data Privacy Claim That May Be Coming Your WayA growing wave of CIPA lawsuits claims that common website analytics tools unlawfully “eavesdrop” on California consumers by collecting behavioral data without clear disclosure or consent. Any business with a website accessible in California could be at risk. Understanding what triggers these lawsuits and how to tighten up website privacy practices can help companies stay out of the crosshairs.
Services
Education
University of Wisconsin Law School, J.D.
Marquette University, B.A., magna cum laude and Phi Beta Kappa
Certified Privacy Professional (CIPP-US)
Admissions
- Illinois
- Wisconsin






