Simin Sun


Education and Clerkships

J.D., University of Pennsylvania Law School, 2011, Asian Pacific American Law School Students Association; East Asia Law Review, Associate Editor

B.B.A., Corporate Finance and Business Honors Program, University of Texas at Austin, 2008

Judicial Intern, The Honorable Judge Lee H. Rosenthal, U.S. District Court for the Southern District of Texas, Summer 2009


Texas, 2011


Chinese (Mandarin)


Simin Sun is an associate in the Mergers and Acquisitions, Capital Markets and Securities, and Energy Practice Groups in the Houston office of Haynes and Boone.

His practice is primarily focused on corporate securities, mergers and acquisitions, securities offerings, corporate governance, cross border transactions, and other corporate matters. He assists clients in various corporate matters including equity financings for privately and publicly held companies, reporting obligations under the Securities Exchange Act of 1934, stock and asset acquisitions, compliance with corporate governance regulations, public and private securities offerings, and other securities transactions.

Selected Publications

  • "Damages Limitations in NDAs and Confidentiality Agreements," co-author with Debra Hatter, January 2012.


Oil and Gas

Haynes and Boone Helps Alta Mesa Close $3.8 Billion Merger

A team of Haynes and Boone lawyers advised Alta Mesa Holdings, LP, which on February 9 completed its $3.8 billion combination with Silver Run Acquisition Corporation II and Kingfisher Midstream LLC.

Mergers and Acquisitions

Human resources

Haynes and Boone Advises KMG in $495 Million Acquisition

Haynes and Boone, LLP Partner Bill Nelson led a team of lawyers who represented client KMG Chemicals Inc. in its acquisition of Flowchem, a leading manufacturer of pipeline performance products, from Arsenal Capital Partners. Haynes and Boone also advised KMG on the related financing of the transaction.

Selected Client Representations

  • Consolidated Graphics, Inc. in a public merger transaction with R.R. Donnelley & Sons Co.
  • A private E&P company in a $250 million Rule 144A note offering and subsequent $250 million tack-on offering
  • A private company in the funeral home business in a $50 million acquisition of assets pursuant to a FTC Ordered Divestiture
  • A large independent energy retailer in a private merger to form one of the largest independent energy retailers in Canada
  • Potentia Energy, LLC in its sale to Verde Energy USA Texas, LLC, which has approximately 300,000 customers and is focused on the residential and small to mid-size commercial power markets
  • A privately held hospitality company in a $250 million senior note Rule 144A tack-on offering
  • A national bank in a Chapter 11 reorganization of a coal mining company
  • A private multinational oil and gas company in a reorganization of its corporate structure
  • A sale of a private fuel lubricants company to a strategic buyer
  • A sale of a medical waste transportation company to a strategic buyer

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