Collin Vierra is a Partner whose nationwide practice focuses on complex trial and appellate litigation, commercial and consumer mass arbitration, and counseling. Collin’s practice touches on a wide range of issues, including data privacy and AI, discrimination, products liability, commercial disputes, antitrust and unfair competition, environmental law, and government regulation. A graduate of the Massachusetts Institute of Technology (MIT), Stanford University, and Stanford Law School with degrees in engineering and economics, clients trust Collin with their most high-stakes and cutting-edge disputes. Among others, his legal acumen has been recognized by Law.com/The Recorder (Lawyer on the Fast Track), Legal 500 (recognizing Collin’s “particular prowess in mass arbitration defense”), Benchmark Litigation (identifying the “best and brightest litigators across the U.S.”), and Top Verdict (identifying Collin as having obtained one of the top verdicts in California in 2024).
Collin chairs Eimer Stahl’s Mass Arbitration Practice Group, and clients call him a “leading lawyer” of mass arbitration defense. His creative solutions to novel arbitration issues have saved his clients tens of millions of dollars in arbitration costs and damages. A featured speaker on mass arbitration issues, he has presented to numerous institutions including the American Bar Association, the Federalist Society, the U.S. Chamber Litigation Center, Stanford Law School, MassArbCon, the Association of Corporate Counsel, and the Data Privacy and Cyber Security ConfEx. Collin has helped companies respond to over 200,000 individual demands for arbitration across numerous industries, including the social networking, consumer hardware, and consumer entertainment industries. He has obtained tens of thousands of dismissals and withdrawals of mass arbitration claims without any settlement payment or judgment to claimants, and has secured hundreds of thousands of dollars in fee-shifting awards for his corporate clients against both claimants and their counsel. Collin has arbitrated before numerous institutions including JAMS, the AAA, and NAM. His expert analysis on mass arbitration issues has been published in Law360.
Collin also co-chairs Eimer Stahl’s Data Privacy and AI Practice Group, in which role he is a trusted resource for clients navigating cutting-edge data privacy, AI, and other technological disputes. He regularly defends and counsels clients on privacy issues relating to web technologies and platforms such as Facebook/Meta Pixel, LinkedIn Insight Tag, X/Twitter Pixel, TikTok Pixel, Google Analytics, TDD/The Trade Desk Universal Pixel, ADNXS/AppNexus, New Relic, DoubleClick, OpenX, LiveRamp, TripleLift, mobile SDKs, and others. He has counseled and/or defended clients in matters involving a garden variety of state and federal data privacy statutes and constitutional claims, including under the Illinois Biometric Information Privacy Act (BIPA), the Texas Capture or Use of Biometric Identifiers Act (CUBI), the California Invasion of Privacy Act (CIPA), the California Consumer Privacy Act (CCPA), the Video Privacy Protection Act (VPPA), the Gramm-Leach-Bliley Act (GLBA), the Children’s Online Privacy Protection Act (COPPA), and others.
Collin also has substantial experience managing high-stakes discovery disputes. On the defense side, he was previously responsible for coordinating discovery in one of the nation’s largest multidistrict litigation (MDL), multistate Attorneys General (AGs), and multiagency actions. In 2024, Tennessee Governor Bill Lee appointed Collin as discovery counsel in State of Tennessee ex rel. Jonathan Skrmetti v. Meta Platforms, Inc., in which the State seeks to hold Meta responsible for the harmful impacts of Instagram on teens. In 2025, Governor Lee also appointed Collin as discovery counsel in Keira v. Tennessee Department of Children’s Services, which concerns the State’s foster care system. Collin’s insights on pressing discovery issues have also been published in Law360.
Collin has ample experience in both state and Article I and III federal court and with all aspects of litigation, including successfully trying claims from complaint to jury verdict. He has defended major public and private companies in consumer class actions, multi-district litigations (MDL), and Judicial Council Coordination Proceedings (JCCP). Collin has also defended these companies in civil and criminal investigations by the U.S. Department of Justice (DOJ), the U.S. Federal Trade Commission (FTC), the Federal Bureau of Investigation (FBI), the U.S. Securities and Exchange Commission (SEC), the U.S. Food and Drug Administration (FDA), the U.S. House of Representatives, the U.S. Senate, and the Attorneys General of more than 45 states and the District of Columbia.
His academic background includes a Bachelor of Science in Engineering from the Massachusetts Institute of Technology (MIT) where he was a member of the Pi Tau Sigma Mechanical Engineering Honors Society and an engineering apprentice in the Pappalardo Laboratory. He is currently a member of the MIT Free Speech Alliance. He also holds a Master of Arts in Economics from Stanford University where he was a Gregory Terrill Cox Fellow in the John M. Olin Program in Law and Economics. Collin obtained his Juris Doctor from Stanford Law School.
Collin is licensed to practice in California and Texas.
Experience
Case Experience
Privacy
Rojas v. Clearview AI, Inc. (Cal. Super. Ct.; Cal. Ct. App.) – Defending world’s leading facial recognition technology company in action alleging violations of individual privacy rights under California law.
Consumer Hardware Mass Arbitrations (AAA) – Successfully defended consumer hardware company in series of mass arbitrations alleging violations of Video Privacy Protection Act (VPPA) by defeating 100% of claims and receiving six figures in fee-shifting awards for defendant.
Davis v. Walmart Inc. (N.D. Ill.) – Obtained successful dismissal of putative Biometric Information Privacy Act (BIPA) class action for world’s largest retailer.
Roku, Inc. v. Williams, Womble, Bach (Cal. Super. Ct.) – Successfully enforced informal dispute resolution clause, including fee-shifting award for violations of the same, against plaintiff’s law firm for major streaming service.
Murphy v. Confirm ID, Inc. (E.D. Cal.) – Through novel use of YouTube video demonstratives proving assent to arbitration terms, successfully moved to compel individual arbitration of Illinois Biometric Information Privacy Act (BIPA) claims filed as putative class action against ID verification company.
Murphy v. FriendFinder Networks, Inc. (Ill. Cir. Ct.) – Obtained successful dismissal of putative Illinois Biometric Information Privacy Act (BIPA) class action against adult dating site; plaintiff was forced to pay defendant’s costs.
Massel v. Coinbase, Inc. (N.D. Cal.) – Successfully moved to compel individual arbitration of Illinois Biometric Information Privacy Act (BIPA) claims filed as putative class action against cryptocurrency exchange.
Atterbury v. SoundHound, Inc. (N.D. Cal.) – Obtained successful dismissal of putative class action alleging violations of Illinois Biometric Information Privacy Act (BIPA) for voice AI company.
Communications Technology Investigations (DOJ) – Defended leading communications technology company in investigations by U.S. Department of Justice (DOJ) into privacy and security practices.
Web Tracking Mass Arbitration (AAA) – Successfully defended web service provider in mass arbitration alleging violations of California Invasion of Privacy Act (CIPA) and related statutes by obtaining complete withdrawal of claims.
Meta Platforms, Inc. Subpoena Enforcement Action (Cal. Super. Ct.; N.Y. Sup. Ct.) – Successfully defended technology company against successive attempts by Meta to enforce subpoena against non-party in California and New York in connection with out-of-state Texas Capture of Use of Biometric Identifiers Act (CUBI) enforcement action.
Google LLC Subpoena Enforcement Action (N.Y. Sup. Ct.; Tex. Dist. Ct.) – Successfully defended technology company in attempt by Google to enforce subpoena against non-party in connection with Texas Capture of Use of Biometric Identifiers Act (CUBI) enforcement action.
Data Breach Mass Arbitration (AAA) – Successfully defended consumer service company in mass arbitration stemming from alleged data breach by obtaining complete withdrawal of claims.
Social Networking Arbitration (JAMS) – Successfully defended consumer application company in arbitration alleging violations of California Consumer Privacy Act (CCPA).
KYC Federal Investigation (FBI) – Defended identity verification service in connection with Federal Bureau of Investigation (FBI) investigation.
Levens v. For Goodness Sake LLC (N.D. Cal.) – Defended intimacy education website in putative class action alleging violations of Video Privacy Protection Act (VPPA).
Goodman v. Hillsdale College (E.D. Mich.) – Defending university online course service in putative class action alleging violations of Video Privacy Protection Act (VPPA).
Brown v. Walmart Inc. (W.D. Ark.) – Successfully compelled arbitration for world’s largest retailer in putative class action alleging violations of Video Privacy Protection Act (VPPA).
Streaming Service Mass Arbitration (JAMS) – Defended streaming service in mass arbitration alleging violations of Video Privacy Protection Act (VPPA).
Antitrust, Unfair Competition, and False Advertising
In re Crop Inputs Antitrust Litigation (MDL; 8th Cir.) – Successfully moved to dismiss claims against Canadian agricultural cooperative in multi-district litigation alleging conspiracy to keep certain crop inputs electronic platforms out of the U.S. market (currently on appeal).
In re Rail Freight Fuel Surcharge Antitrust Litigation (MDL) – Representing various companies in antitrust action to recover for overpayments made to railroads as a result of price-fixing conspiracy.
Mortgage Industry Arbitration (AAA) – Represented mortgage servicing company in arbitration involving competing claims of anticompetitive conduct in violation of Sherman Act and California Unfair Competition Law.
Gaming Company Mass Arbitration (AAA) – Successfully represented gaming company in mass arbitration alleging use of illegal dark patterns and false price advertising.
Over-the-Counter Sales Arbitration (AAA) – Represented online retailer in mass arbitration alleging false advertising in sale of allegedly ineffective over-the-counter health products.
Apple Inc. v. Epic Games, Inc. (SCOTUS) – Drafted amicus brief for app developer association regarding propriety of nationwide injunctions and market benefits of anti-steering provisions.
Products Liability
In re JUUL Labs, Inc., Marketing, Sales Practices, and Products Liability Litigation (MDL, JCCP) – Defended world’s leading e-cigarette manufacturer in hundreds of putative class actions and related investigations alleging product defects and violations of consumer protection laws.
Consumer Products Investigations (DOJ, FTC, FDA) – Defended consumer products company in investigations by U.S. Department of Justice (DOJ), U.S. Federal Trade Commission (FTC), and U.S. Food and Drug Administration (FDA) into advertising practices.
State of Tennessee ex rel. Skrmetti v. Meta Platforms, Inc. (Tenn. Ch. Ct.) – Representing State of Tennessee in action seeking to hold Meta responsible for the harmful impacts of Instagram on youth.
Commercial Disputes
Chemical Industry Arbitrations (ICC, ICDR) – Represented multinational chemical company in series of commercial arbitrations regarding nine-figure contract disputes at chemical production sites.
Clearview AI, Inc. v. Investigative Consultants, Inc. (AAA; N.Y. Sup. Ct.; S.D.N.Y.) – Successfully represented purchaser in commercial arbitration to recover funds for breach of contract for provision of data under New York law.
Cryptocurrency Arbitrations (AAA) – Defending cryptocurrency company in series of arbitrations alleging responsibility for takeovers of customers’ accounts by scammers.
Arntsen et al. v. Davis et al. (Cal. Super. Ct.; E.D. Cal. Bankr.) – Successfully represented senior citizens and immigrants in month-long jury trial to obtain more than $1.3 million jury verdict including $66,666 in punitive damages for each of the six plaintiffs; successfully moved for summary judgment in bankruptcy court adversary proceeding, which found entirety of jury verdict nondischargeable in bankruptcy.
Royalty Payment Arbitrations (AAA) – Defended company in mass arbitrations alleging failure to pay contractually required royalties.
Reinstatement Arbitration (NAM) – Defending social networking company in arbitration alleging illegality of unilateral termination right.
Pesticide Industry Insurance Arbitration (Ad Hoc) – Defended captive insurance providers in ad hoc arbitration in connection with pesticide liability claims following separation agreement.
Riverbed Technologies, Inc. v. Scottish Equity Partners (Cal. Super. Ct.; Cal. Ct. App.) – Successfully represented information technology company in action to recover restitution for class action judgment overturned on appeal.
Discrimination
Social Networking Mass Arbitrations (JAMS) – Defended social networking company in mass arbitrations alleging that women-protective features violated of California’s Unruh Civil Rights Act.
Consumer Website Mass Arbitration (AAA) – Defended consumer website company in mass arbitration alleging that racial and religious profile filters violated of California’s Unruh Civil Rights Act and federal Civil Rights law.
Consumer Hardware Mass Arbitration (JAMS) – Defended consumer hardware company in mass arbitration alleging that targeted advertising violated of California’s Unruh Civil Rights Act.
Streaming Service Mass Arbitration (JAMS) – Defended streaming service in mass arbitration alleging that targeted advertising violated of California’s Unruh Civil Rights Act.
Consumer Entertainment Mass Arbitration (JAMS) – Defended consumer entertainment company in mass arbitration alleging that targeted advertising violated of California’s Unruh Civil Rights Act.
Gaming Mass Arbitration (JAMS) – Defended gaming company in mass arbitration alleging that targeted advertising violated of California’s Unruh Civil Rights Act.
Social Networking Arbitration (JAMS) – Successfully defeated claim and obtained fee-shifting award against claimant in arbitration alleging violations of California’s Unruh Civil Rights Act.
Regulatory
Kiera v. Tennessee Department of Children’s Services (M.D. Tenn.) – Defending Tennessee Department of Children’s Services in action regarding State’s foster care system.
Homeaway.com, Inc. v. Palm Beach County (S.D. Fla.) – Represented vacation rental marketplace in series of challenges to local and state ordinances regulating short-term rental properties.
County of Dane v. Public Service Commission of Wisconsin (SCOWIS) – Successfully appealed to Wisconsin Supreme Court to quash subpoena of former public commissioner; Wisconsin Supreme Court found that alleged “appearance of bias” did not state cognizable claim for Due Process violation under U.S. and Wisconsin Supreme Court precedents.
State v. Berrada Properties Management, Inc. (Wis. Cir. Ct.) – Defended Milwaukee’s largest landlord in state action alleging violations of consumer protection regulations and landlord-tenant laws.
National Retail Federation v. Department of Industrial Relations (Cal. Super. Ct.) – Drafted amicus brief for California vineyard arguing that Cal/OSHA’s “COVID-19 Emergency Temporary Standards” violated California law and California’s constitutional non-delegation doctrine.
Environmental Law
Climate Change Litigation (1st Cir.; 2d Cir.; 3d Cir.; 4th Cir.; 9th Cir.; SCOTUS) – Defending major petroleum refiner, transporter, and marketer in series of government actions seeking to hold certain oil and gas producers liable for alleged effects of climate change.
Green Energy Industry Investigation (DOJ) – Defended leading green energy company in environmental investigation by U.S. Department of Justice (DOJ) into wind farm operations.
Employment
California Business & Industrial Alliance v. Bonta (Cal. Ct. App.) – Drafted amicus brief for U.S. Chamber of Commerce arguing that California’s Private Attorneys General Act (PAGA) violates the separation of powers enshrined in the California Constitution.
People v. Handy (Cal. Super. Ct.) – Drafted amicus brief for U.S. Chamber of Commerce arguing that referral services are exempt from California’s AB5, which classifies certain workers as employees rather than independent contractors.
Securities Litigation
Slack Technologies, Inc. Securities, Shareholder, and Derivative Litigation (Cal. Super. Ct.; Del. Ct. Chancery; D. Del.; N.D. Cal.; 9th Cir.) – Defended leading technology company in first-of-its-kind litigation relating to its direct listing on the New York Stock Exchange (NYSE).
Consumer Products Investigation (SEC) – Defended market-leading consumer products company in investigations by U.S. Securities and Exchange Commission (SEC) into statements made in private offering materials.
Recognitions
Honors & Recognitions
Benchmark Litigation 40 & Under (2024 and 2025)
Top Verdict - Number 1 Verdicts in California (2024)
California Legal Awards Lawyers on the Fast Track - Law.com/The Recorder (2025)
Legal 500 – Recommended Lawyer in General Commercial Disputes (2025)
Best Lawyers: Ones to Watch in America (2026)