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Luke Sosnicki


Los Angeles
310 282 2538 310 282 2538 direct

Luke is an experienced commercial litigator who solves complicated business problems for  financial services, telecommunications, manufacturing, and retailer clients.

Luke defends clients in consumer class actions alleging unfair and deceptive practices and false advertising relating to customer agreements and disclosures, product labeling, print and media advertising, and online sales. The damages at issue in these lawsuits has ranged from hundreds of thousands to tens of millions of dollars.

Luke represents clients in commercial disputes, including breaches of contract, leasing, negligence, intentional and negligent misrepresentation, and trade-secret theft, among others. In both litigation and arbitration, Luke uses effective and efficient strategies to further his clients' business needs and goals.

As an experienced financial services litigator, Luke also defends financial institutions in lawsuits across the country brought under various state and federal consumer protection statutes.  These lawsuits have challenged financial institutions' practices relating to account and loan fees, loan origination, servicing, debt collection, foreclosure, and unfair and deceptive lending practices.

Luke is also found at the forefront of data and cybersecurity issues. He holds a CIPP/US certification from the International Association of Privacy Professionals, and provides comprehensive advice on litigation risks related to federal and state data privacy laws, including the California Consumer Privacy Act (CCPA).

Commercial Litigation

Representation of financial services company in lawsuit alleging tortious interference with plaintiff's factoring agreement with an entity in which the company had a significant investment. Obtained complete summary judgment on claims seeking over $11 million. Affirmed on appeal.

Representation of real estate development company in lawsuit alleging breach of fiduciary duty relating to misappropriation of key assets.

Representation of introducing broker in negligence and breach of duty claims arising from alleged account liquidation.

Representation of global manufacturing solutions company in numerous seven-figure arbitrations with customers and suppliers.

Representation of clothing manufacturer in U.S. proceedings arising from alleged foreign trademark infringement.

Representation of manufacturer of laboratory equipment in contract dispute with supplier.

Representation of advertising technology company in contract dispute with third-party software developer.

Representation of real estate development company in lawsuit alleging trade-secret theft.

Consumer Litigation

Representation of major mortgage servicers and lenders in individual and putative class action lawsuits alleging various lending violations, origination fraud, loan-servicing errors, premises liability, and title issues.

Representation of major telecommunications company in putative class action alleging false advertising and unfair competition claims relating to telecommunications services.

Representation of major telecommunications company in putative class action under the Telephone Consumer Protection Act.

Representation of community bank in putative class action alleging improperly-assessed and collected overdraft fees.

Representation of retail restaurant chain in putative class action alleging false advertising and unfair competition claims relating to food-delivery fees.

Representation of food manufacturer in putative class action alleging false advertising and unfair competition claims relating to food labeling.

Representation of online retailer in claims involving online presentation of discounted pricing.

Consumer Data Privacy and Security

Advising major sales and marketing company on California privacy laws as applied to significant California marketing campaign.

Advising major consultancy firm on the privacy and security aspects of its contracting processes with its customers that collect consumer information.

Advising insurance client on California privacy laws as applied to its California-based operations.


Fifteen Attorneys General Ask Congress Not to Replace State Privacy Laws With Federal Law

California AG Announces Second Settlement Under the California Consumer Privacy Act

California Chamber Seeks State Supreme Court Review of Privacy Act Enforcement

CPPA’s Deputy Director of Enforcement Promises Vigorous Action by Expanded Enforcement Staff

FTC issues fine to GoodRx over information sharing

Transportation Security Administration releases security directive on railroad cybersecurity mitigation actions and testing

California issues first fine under CCPA

FTC solicits feedback on advance notice of proposed rulemaking related to commercial surveillance and data security practices

Utah and Connecticut enact comprehensive data privacy laws

Numerous privacy bills introduced in California legislature


How Privacy Requirements Impact AI

Countdown to CPRA

10 Ways To Avoid Cyber & Privacy Lawsuits

Complying with the Revised FTC Safeguards Rule: Lessons from the New York Experience

The Revised FTC Safeguards Rule - What It Means and Why It Is More Important Than You Might Think

California Privacy: CCPA and Beyond

Election Day Impacts for Cyber and Privacy

Protecting the Ever-Increasing Endpoints in Higher Education

In the Cyber Cross-hairs: Protecting High-Profile Targets

CCPA for Financial Institutions

Using GDPR to Prepare for CCPA, and Vice-Versa

Preparing for the California Consumer Privacy Act: Practical Ways to Mitigate Risk and Develop Litigation Defenses

Thompson Coburn Publications

California urges Ninth Circuit to set a higher bar for dismissing false advertising claims at the pleadings stage

Federal court rules that bank doesn’t have to reimburse fraudulent Zelle transfers


Author, "Court Challenges to Web Tracking Tools Raise Crucial Questions'
Bloomberg Law, December 8, 2023

Author, "New California Agency Sets Enforcement Priorities for Privacy,"
Bloomberg Law, August 25, 2023

"On Compliance: Should Your Credit Union Be A Plaintiff In A Data Breach Class Action Suit?,"
Credit Union Management, publication of the Credit Union Executives Society (CUES), July 2019

Chapter 19,
Consumer Financial Services Answer Book, 2022