Chessie Thacher
Tel. (415) 773-6674


Stanford Law School, J.D., 2011

Colorado College, B.A., 2003


Hon. Robert P. Patterson, Jr.
U.S. District Court for the Southern District of New York, 2012-2013

Hon. Sidney R. Thomas
U.S. Court of Appeals for the Ninth Circuit, 2011-2012

Bar Admissions


Chessie Thacher

Ms. Thacher represents individuals and businesses in a range of high-stakes civil litigation and criminal matters. She has tackled thorny cases involving trade secret disputes, breach of contract matters, professional negligence claims, securities issues, and business torts. As part of her active pro bono practice, Ms. Thacher also addresses social justice issues and has authored numerous amicus briefs in the California Supreme Court and the Court of Appeal.

Before joining Keker, Van Nest & Peters, Ms. Thacher clerked at the District Court for the Southern District of New York and at the Court of Appeals for the Ninth Circuit. Ms. Thacher also gained valuable hands-on legal training while a student at Stanford, working for the U.S. Department of Justice, the Stanford Environmental Law Clinic, and the Royal Government of Bhutan. In addition, she regularly volunteered as an instructor at a local juvenile justice facility.

Ms. Thacher was a Henry Luce Scholar and spent one year conducting research in China before attending law school. Prior to that experience, Ms. Thacher worked for a non-profit supporting Yellowstone National Park. 

Cases of Note

SanDisk Corp. v. SK Hynix Inc.: We represented SanDisk in a massive trade secret misappropriation and corporate espionage case. SanDisk, a global leader in flash memory storage solutions, sued competitor SK Hynix for misappropriating approximately ten gigabytes of highly confidential trade secret information and using that information over the course of six years to revamp Hynix’s technology and unfairly compete with SanDisk. We obtained a sweeping preliminary injunction that barred Hynix from any further use or disclosure of stolen SanDisk information, and fought back efforts to dismiss the case, to send it to arbitration, to transfer it overseas, and to remove it from the court that granted the preliminary injunction. Following a series of courtroom victories for our client, the parties reached a confidential settlement and entered into a product supply agreement.

Plaintiff v. Amyris, Inc.: In this putative securities class action, the plaintiff accused our client, a renewable energy company, of knowingly making false and misleading statements over the production of a chemical used in transportation fuels. After we demonstrated the company was simply mistaken in their projections and its statements provided meaningful cautionary warnings, the judge granted our motion to dismiss.

Plaintiff v. Law Firm: We successfully defended in arbitration a top law firm and one of its partners against a multi-million dollar malpractice claim related to estate planning. We were able to get the case dismissed on statute of limitations grounds and also obtained attorneys’ fees on behalf of our client.

In re Alejandro N.: On behalf of the ACLU and other amici, we submitted a brief challenging the San Diego District Attorney’s refusal to offer juveniles the benefit of sentencing reforms made available by Proposition 47. We argued that the DA’s position contravened voter intent and violated juveniles’ equal protection rights. The Court of Appeal for the Fourth District agreed, ruling that Proposition 47 should apply equally to juveniles and adults. The court’s decision is now binding on trial courts across California, and the sentencing relief afforded will help thousands of young people access better opportunities in education, employment, and the military. It also ensures that they face less severe penalties in future criminal or immigration proceedings.

Honors and Awards

Stanford Law School

  • Articles Editor, Stanford Environmental Law Journal
  • Hilmer Oehlmann, Jr. Award for Outstanding Performance in Research and Legal Writing
  • Deborah Rhode Public Interest Award

Henry Luce Scholar, Yunnan Province, China

Colorado College

  • Morris K. Udall Scholar
  • National Science Foundation Research Award
  • Stabler Biology Award
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