Stephanie Yonekura

Stephanie Yonekura

Los Angeles

Email stephanie.yonekura@​

Phone +1 310 785 4668

Fax +1 310 785 4601


Practice groupLitigation, Arbitration, and Employment

Stephanie Yonekura leads our global Investigations, White Collar, and Fraud practice. She is a member of the firm's Crisis Leadership Team and regularly advises clients on corporate compliance issues and policies.

She brings a unique perspective to any internal investigation. Having served as a federal prosecutor for 14 years and as the Acting U.S. Attorney in Los Angeles, Stephanie knows the hot-button issues that are considered in every stage of any government investigation. As the Acting U.S. Attorney of the largest office outside of Washington, D.C., Stephanie was an active participant in the larger U.S. Department of Justice (DOJ) community, serving on nationwide committees on white collar fraud, cybercrime, and intellectual property. Stephanie is a highly accomplished trial attorney, exuding confidence, knowledge, and integrity in the courtroom.

In private practice, Stephanie uses her substantial experience in the trenches, in the courtroom, and as the chief law enforcement officer in Los Angeles to help clients understand the key issues and investigate matters strategically and surgically.

Awards and recognitions


Litigation: White-Collar Crime & Government Investigations (California)
Chambers USA


Leaders of Influence: Top Litigators and Trial Lawyers
Los Angeles Business Journal

Education and admissions


J.D., University of California, Los Angeles School of Law, 1996

B.A. Political Science, magna cum laude, University of California, Los Angeles, 1992


Board Member, Library Foundation of Los Angeles, 2016

Board Member, Japanese American Bar Association, 2015-2016

Member, Los Angeles Police Commission's Advisory Committee

Bar admissions and qualifications


Related knowledge


Representative experience

Represented a tech company in a False Claims Act case and advocated for DOJ and California not to intervene. The court dismissed with prejudice and awarded attorney's fees.

Conducted an internal investigation for a food company involving potential Foreign Corrupt Practices Act (FCPA) violations in Thailand.

Conducted an internal investigation for a Fortune 500 company involving potential FCPA violations in the United Arab Emirates.

Represented a Fortune 500 health care company in arbitration contract dispute. Obtained judgment in client's favor and award of attorney's fees.

Represented a software developer in connection with alleged fraud scheme investigation by DOJ.

Represented a university in connection with a National Science Foundation - Office of Inspector General (NSF-OIG) and DOJ investigation relating to alleged grant fraud.

Conducted an internal investigation for a university relating to alleged health care fraud violations.

Represented a medical device company in a U.S Food and Drug Administration and OIG investigation.

Represented a Fortune 500 life sciences company in connection with a U.S. Securities and Exchange Commission (SEC) insider trading investigation.

Represented a Fortune 50 health care company in connection with DOJ health care fraud investigation.

Represented a private investment firm in connection with an SEC fraud investigation.

Advised media companies on cybersecurity incident response preparation and planning.

Oversaw a DOJ investigation of the hacking of one of the world's largest entertainment companies reportedly by a foreign government.

Supervised a DOJ residential mortgage-backed securities (RMBS) investigation into a major financial institution, resulting in a record billion-dollar settlement.

Oversaw a DOJ investigation of a national rating agency's rating of RMBS and collateralized debt obligations leading to a multimillion-dollar settlement.

Authorized every qui tam intervention decision in Los Angeles as Acting U.S. Attorney and First Assistant U.S. Attorney.

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