Collin Vierra is a highly sought after litigator and counselor 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, commercial disputes, antitrust and unfair competition, discrimination, products liability, environmental law, and government regulation. Collin represents companies across many industries, including technology and AI, retail, consumer hardware, energy, automotive, cryptocurrency, healthcare, social media and online dating, adult education and entertainment, gaming, video streaming, higher and online education, gig economy, media and politics, and more. 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 Legal 500 (recognizing Collin’s “particular prowess in mass arbitration defense”), Law360 (Cybersecurity & Privacy Rising Star), Top Verdict (identifying Collin as having obtained one of the top verdicts in California), Benchmark Litigation (identifying the “best and brightest litigators across the U.S.”), and Law.com/The Recorder (Lawyer on the Fast Track).
Mass Arbitration: 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 hundreds of millions of dollars in arbitration costs and damages. A featured speaker on mass arbitration issues, he has presented to a wide range of 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 hundreds of thousands of individual demands for arbitration across diverse industries. He has obtained numerous dismissals and withdrawals of mass arbitration claims without any settlement payment or judgment to claimants, and has secured groundbreaking fee-shifting awards for his corporate clients against both claimants and their counsel. Collin has arbitrated before many institutions including JAMS, the AAA, and NAM, and is frequently called upon as an expert in arbitration reform.
Cybersecurity, Data Privacy, and AI: 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, data breach, cybersecurity, 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 California Invasion of Privacy Act (CIPA), the Illinois Biometric Information Privacy Act (BIPA), the Automated License Plate Reader Law (ALPR), the Texas Capture or Use of Biometric Identifiers Act (CUBI), the California Consumer Privacy Act (CCPA), the Video Privacy Protection Act (VPPA), the Gramm-Leach-Bliley Act (GLBA), the Genetic Information Privacy Act (GIPA), the Florida Security of Communications Act (FSCA), the Children’s Online Privacy Protection Act (COPPA), the My Health My Data Act (MHMDA), and others.
Mass and Class Consumer Claims: Outside the privacy space, Collin also regularly defends clients against high-stakes consumer claims, especially those involving the threat of hefty statutory damages. Among others, Collin defends and counsels clients regarding claims over IEEPA tariff pass-throughs and refunds, deceptive emails including under the California Anti-Spam Law and the Washington Commercial Electronic Mail Act (CEMA), the Telephone Consumer Protection Act (TCPA), autorenewal laws (ARL), the Restore Online Shoppers’ Confidence Act (ROSCA), deceptive advertising, algorithmic pricing, dark patterns, junk fees and drip pricing, and more.
Google Ads Monopolization Claims: Collin currently represents clients bringing individual arbitration claims against Google from Google’s alleged monopolization of the online open-web display and search text ad markets. Stemming from the DOJ’s monopolization findings against Google, the arbitrations seek private recovery from ad spend overcharges, treble damages, and attorney’s fees and costs.
Complex Discovery and State Representation: Collin 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 been published in Law360. Collin also works on discovery issues with Lawyers for Civil Justice.
MDLs, JCCPs, and Investigations: 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. Collin has also overseen high-stakes internal investigations and implemented curative reforms for companies facing potentially significant exposure.
Collin’s 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, Texas, and Tennessee (Practice Pending Admission, Rule 7, § 10.07).
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.
Brown v. Walmart Inc. (W.D. Ark.) – Successfully defended world’s largest retailer in putative class action alleging violations of Video Privacy Protection Act (VPPA).
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.
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.
Automotive Mass Arbitration (AAA) – Defending automotive company against mass arbitration claims alleging improper collection, use, and disclosure of driver data.
Plaintiffs v. Walmart Inc. (N.D. Ill., S.D. Ill.) – Representing leading retailer in putative class actions alleging use of biometrics in connection with customer service phone calls.
Plaintiffs v. Walmart Inc. (Cal. Super. Ct., E.D. Cal, C.D. Cal.) – Representing leading retailer in putative class actions alleging improper disclosures in connection with alleged use of automatic license plate readers.
R.C. v. Walmart Inc. (C.D. Cal., CA9) – Representing world’s largest retailer in putative class action alleging improper disclosure of health information on online website.
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.
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 Investigations (FBI) – Defended identity verification service in connection with Federal Bureau of Investigation (FBI) investigations.
Levens v. For Goodness Sake LLC (N.D. Cal.) – Defended adult intimacy education website in putative class action alleging violations of Video Privacy Protection Act (VPPA).
Goodman v. Hillsdale College (E.D. Mich.) – Defended university online course service 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
Google Ads Claims (AAA) – Representing major companies pursuing antitrust claims against Google for alleged monopolization of the online open-web display and search text ad markets, seeking to recover for ad spend overcharges, treble damages, and attorney’s fees and costs.
Online Shopping Mass Arbitrations (AAA) – Defending online shopping company against mass arbitration claims alleging unlawful surveillance, algorithmic, drip, and other pricing practices.
Online Entertainment Litigation and Mass Arbitration (AG, AAA) – Represented online entertainment company in actions alleging use of illegal dark patterns and deceptive advertising to lure, retain, and profit from users.
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.
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.
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
Kennedy v. Lyft, Inc. (Cal. Super. Ct.) – Successfully defended rideshare company in action alleging that feature allowing women to express a preference for matching with other women violated California’s Unruh Civil Rights Act by successfully compelling individual arbitration of claims over argument that rideshare company’s bellwether process was unconscionable.
Streaming Service Mass Arbitrations (JAMS, AAA) – Defended multiple streaming services in mass arbitrations alleging that targeted advertising violated California’s Unruh Civil Rights Act; successfully obtained dismissals of tens of thousands of claims via threshold dispositive motion.
Social Networking Mass Arbitrations (JAMS) – Defended social networking company in mass arbitrations alleging that women-protective features violated 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 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 California’s Unruh Civil Rights Act.
Consumer Entertainment Mass Arbitration (JAMS) – Defended consumer entertainment company in mass arbitration alleging that targeted advertising violated California’s Unruh Civil Rights Act.
Gaming Mass Arbitration (JAMS) – Defended gaming company in mass arbitration alleging that targeted advertising violated 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.
Employment
SemiAnalysis, LLC v. Zhou (Cal. Super. Ct., JAMS) – Representing leading AI research publication in dispute with former employee over termination and alleged pre- and post-termination misconduct.
Zerohash LLC v. Grout (N.D. Ill., AAA) – Representing former employee of technology company in dispute over scope of non-compete agreement.
Confidential Post-Employment Dispute – Representing multiple entities in dispute with former employee relating to alleged trade secret theft.
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.
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.
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.
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.
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.
Confidential Investigation – Managed internal investigation regarding alleged violations of federal trading laws.
Recognitions
Honors & Recognitions
Law360 Rising Star – Cybersecurity & Privacy (2026)
Best Lawyers: Ones to Watch in America (2026)
Legal 500 – Recommended Lawyer in General Commercial Disputes (2025)
Law.com/The Recorder – California Legal Awards Lawyers on the Fast Track (2025)
Benchmark Litigation 40 & Under (2024-2026)
Top Verdict - Number 1 Verdicts in California (2024)