Bing (Sunny) Sun

Bing "Sunny" Sun

Associate
San Francisco
About

Bing "Sunny" Sun advises multinational companies in high-stakes disputes, government investigations and inquiries, internal investigations, as well as compliance matters.

Sunny has extensive experience in commercial litigation on complex claims regarding fraud, breach of contract, unfair competition, and violations of state and federal statutes. Her experience encompasses cases in both federal and state courts through all phases of trial, arbitration, and mediation.

Sunny has represented companies and individuals before the Securities and Exchange Commission (SEC), Department of Justice (DOJ), and other federal and state enforcement authorities on matters related to the Foreign Corrupt Practices Act (FCPA), accounting and securities fraud, and other civil and criminal matters. Further, Sunny regularly provides regulatory and compliance advice to clients. 

Sunny has represented corporations, executives, and board members across a wide range of industries, including consumer goods, technology, media, pharmaceutical, finance, telecom, healthcare, investment management, energy, insurance, and manufacturing. 

 
Areas of FocusLitigation, Arbitration and Investigations
Bar admissionsCalifornia
CourtsUnited States Court of Appeals for the Ninth CircuitUnited States District Court for the Northern District of CaliforniaUnited States District Court for the Southern District of CaliforniaUnited States District Court for the Eastern District of CaliforniaUnited States District Court for the Central District of California

EXPERIENCE

  • Successfully defended HP, Inc. and HPI Federal LLC in litigation of claims for over $500 million in the Northern District of California relating to the US government’s termination of a procurement contract award, securing the dismissal of all claims and an award of more than $1.75 million in attorney’s fees and costs under California’s anti-SLAPP statute
  • Successfully resolved in principle more than 25 lawsuits and civil government prosecutions for global telecommunications company facing its first litigation arising out of a major California wildfire
  • Successfully defended energy company in class action alleging deceptive pricing and consumer marketing practices, obtaining the dismissal of all claims
  • Represented Plaintiff-Seller in expedited litigation in Delaware Chancery Court against Defendant-Buyer in earnout dispute, resulting in favorable settlement for client a week before trial
  • Represented a Chinese internet technology company in an internal investigation regarding an allegation that an employee had engaged in a scheme to defraud the company
  • Represented a Chinese consumer product company in an internal investigation regarding whistleblower allegations against a C-level executive relating to business and management misconduct
  • Represented a public US financial company in an internal investigation of its compliance with Federal Deposit Insurance Corporation requirements
  • Represented the audit committee of a public US food distribution company in an SEC investigation of alleged securities violations
 
Languages
  • Chinese (Mandarin)
Education
  • J.D., Harvard Law School
  • B.A., University of Michigan

Publications

  • Co-Author, "Don't get burned: How to lower litigation risk during fire season," Daily Journal, August 7, 2025
  • Assisting Georgia with Climate Change Negotiations, 05 July 2022

Seminars

  • Presentation to the Delegation of Entrepreneurs and Industrial Investors from the Sichuan Province of China on Entering the U.S. Market, Product Liability & Environmental Litigation and Global Compliance & Investigations. DLA Piper’s Palo Alto office, December 19, 2019

My latest insights

News

DLA Piper secures motion to dismiss and anti-SLAPP victory on behalf of HP, Inc.

22 May 2025 .2 minute read

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Phone

+1 415 836 2522
(Work, San Francisco)