Collin Vierra is a Partner in Eimer Stahl’s Silicon Valley office. His practice focuses on complex trial and appellate litigation, arbitration, and counseling including in the areas of privacy, products liability, commercial disputes, antitrust, environmental law, and regulation.

Collin has ample experience in both state and federal court, before major arbitral tribunals including the ICC, IDCR, AAA, and JAMS, and with all aspects of litigation and arbitration. Collin has defended major public and private companies in consumer class actions, multi-district litigations (MDL), Judicial Council Coordination Proceedings (JCCP), and mass arbitrations (20,000+ individual claims). 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 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 40 states and the District of Columbia. 

Collin brings his strong background in engineering, technology, and economics to bear in representing his clients. Collin holds 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. Collin 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 lives in Carmel, California where he serves as the President and a member of the Board of Directors of the Carmel Highlands Association.


Case Experience


Rojas v. Clearview AI, Inc. (Cal. Super. Ct.; Cal. Ct. App.) – Defending leading facial recognition technology company in action alleging violations of individual privacy rights under California law.

Murphy v. FriendFinder Networks, Inc. (Ill. Cir. Ct.) – Obtained successful dismissal of putative 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 BIPA claims filed as putative class action against cryptocurrency exchange.

Meta Platforms, Inc. Subpoena Enforcement Action (Cal. Super. Ct.; N.Y. Sup. Ct.) – Successfully defended technology company against attempt by defendant in out-of-state enforcement action to enforce subpoena against non-party in California; defending company against renewed attempt by defendant to enforce new subpoena in New York.

Communications Technology Investigations (DOJ) – Defended leading communications technology company in investigations by U.S. Department of Justice (DOJ) into privacy and security practices.

Consumer Application Arbitration (JAMS) – Defending consumer application company in arbitration alleging violations of California Consumer Privacy Act (CCPA).


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.

In re Crop Inputs Antitrust Litigation (MDL) – Defending Canadian agricultural cooperative in multi-district litigation alleging conspiracy to keep certain crop inputs electronic platforms out of the U.S. market.

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.

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, FDA, FTC) – 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.

Commercial Disputes

Chemical Industry Arbitrations (ICC, ICDR) – Representing multinational chemical corporation in series of commercial arbitrations regarding contract disputes at chemical production sites, with claims totaling hundreds of millions of dollars.

Data Arbitration (AAA) – Representing purchaser in commercial arbitration to recover funds for breach of contract for provision of data under New York law.

Pesticide Industry Insurance Arbitration (Ad Hoc) – Defending 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.

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.

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.


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 employes rather than independent contractors.


Consumer Application Mass Arbitrations (JAMS) – Defending consumer application company in mass arbitrations alleging violations of California’s Unruh Civil Rights Act.


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.) – Defending Milwaukee’s largest landlord in state action alleging violations of consumer protection regulations and landlord-tenant laws., 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.

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.


J.D., Stanford Law School 

M.A., Stanford University

B.S., Massachusetts Institute of Technology

  • California
  • Texas
  • U.S. District Court for the Eastern District of California
  • U.S. District Court for the Northern District of California
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