Lauren Kaplan


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Leading companies in highly regulated industries trust Lauren Kaplan to counsel and defend them in bet-the-company litigation and high-stakes investigations.

Lauren works with clients facing inquiries and enforcement actions by state attorneys general as well as complex civil litigation. She has represented companies and individuals at trial and appeal in both state and federal courts and in investigations by state and federal agencies. Lauren is also an active member of O’Melveny’s pro bono practice.



Bar Admissions

  • California

Court Admissions

  • US District Court, Central District of California
  • US Court of Appeals, Ninth Circuit


  • University of California at Irvine, School of Law, J.D.: summa cum laude
  • George Mason University, Master in Education (M.E.D.)
  • University of California at Berkeley, B.A., History: with Honors; Phi Beta Kappa

Professional Activities


  • Justice Raymond J. Ikola, California Court of Appeal, Fourth District


  • Honorable George H. King, US District Court, Central District of California
  • Representing companies across a range of industries on consumer-protection and environmental investigations by state agencies, including the attorneys general of California and other states.
  • Defended Sempra Energy and Southern California Gas Company against more than 36,000 plaintiffs alleging damages from the Aliso Canyon gas leak in Porter Ranch, California.
  • Served as trial counsel for a major medical-device company in litigation brought by the California Attorney General over alleged violations of consumer-protection laws. During the three-month trial, Lauren helped formulate trial strategy, prepared key expert and fact witnesses, and argued evidentiary issues.
  • Resolved claims against a major medical-device company in consumer-protection actions brought by the Washington, Kentucky, Mississippi, and Oregon attorneys general.
  • Member of the team that resolved a multistate investigation involving allegations that a major medical-device company had deceptively marketed transvaginal surgical mesh devices.
  • Representing a major international oil and gas company in multiple pending suits filed by states, cities, and counties across the country—including eight filed in California—seeking to hold oil and gas companies liable for the effects of climate change.
  • Represented a major international oil and gas company in investigations by local, state, and federal agencies resulting from a refinery accident; defeated enforcement of federal subpoenas in related litigation.
  • Won dismissal for a major international oil and gas company in a putative class action over refinery operations after defeating class certification and significantly narrowing claims.