David C. Greenstone

David Greenstone is an experienced trial attorney and a founding shareholder of Simon Greenstone Panatier Bartlett, PC. He has served as the managing shareholder of the firm since its inception in February 2006.

David has extensive experience as a trial attorney, and has obtained numerous significant and ground breaking verdicts and settlements on behalf of his clients. He has tried cases involving toxic torts, dangerous pharmaceuticals, defective products, and other catastrophic injuries in various jurisdictions across the country, including State and Federal Court. David was a principal trial counsel in Winkel v. Colgate-Palmolive Co., which was the first verdict against Colgate-Palmolive Co. for an individual who contracted mesothelioma from exposure to Colgate’s Cashmere Bouquet cosmetic talcum powder. The verdict was noted as one of the top 50 verdicts in California for the year 2015. David is licensed to practice law in Texas, California and New York.

David is a member of the prestigious American Board of Trial Advocates (ABOTA). He is also an invited member of the National Trial Lawyers Top 100 Trial Lawyers. David has been honored as a Texas Super Lawyer for a number of years, and he was honored as a Texas Super Lawyer Rising Star continuously from 2005 through 2012. He has been an invited speaker at attorney seminars for both plaintiff and defense attorneys. David serves as a board member for the Texas Trial Lawyers Association, as well as the Dallas Trial Lawyers Association. He and his fellow shareholders are members of the Leaders Forum for The American Association for Justice. David also serves on the Board of Trustees for the Greenhill School in Dallas, Texas.

Practice Areas

  • Toxic Torts
  • Mesothelioma/Asbestos
  • Pharmaceutical Litigation
  • Products Liability
  • Catastrophic Personal Injury and Wrongful Death


  • The University of Texas School of Law, Austin, Texas, 1998, J.D. Honors: Cum Laude
  • University of Texas, Austin, TX, USA, 1995, B.A. Honors: Summa Cum Laude, Major: Government

Court Admissions

  • State Bar of Texas (1998)
  • USDC, Northern District of Texas (2001)
  • USDC, Southern District of Texas (2007)
  • State Bar of New York (2005)
  • State Bar of California (2006)
  • USCA, 7th Circuit Court of Appeals (2010)

Representative Cases

Coulbourn v. Crane Co. and The William Powell Company, United States District Court, Arizona, CV 13-08141-PCT-SRB

Practice Area: Mesothelioma/Asbestos
Date: Apr 22, 2016
Outcome: Significant verdict for Plaintiff, including compensatory damages and punitive damages against Crane Co. and The William Powell Co.
Description: George Coulbourn contracted mesothelioma and died as a result of exposure to asbestos, including from products sold by Crane Co. and William Powell. Plaintiffs proved that the Defendants knew that asbestos was deadly for decades yet never warned Mr. Coulbourn of the dangers or took any precautions to protect him. The Jury found that both companies were responsible for contributing to cause Mr. Coulbourn’s death, and awarded compensatory and punitive damages.


Winkel v. Colgate-Palmolive Co., Los Angeles Superior Court, No BC549253

Practice Area: Mesothelioma/Asbestos
Date: Apr 28, 2015
Outcome: Significant verdict for Plaintiff
Description: Judith Winkel contracted mesothelioma from exposure to Cashmere Bouquet, a cosmetic talcum powder product made by Colgate. Plaintiffs proved that Colgate’s product contained asbestos and caused Judith Winkel’s cancer. This case was the first trial to go to verdict against Colgate for a cosmetic talcum powder product causing mesothelioma.


Stoute v. John Crane, 18th Judicial District, Parish of Iberville, Louisiana, NO. 71,751

Practice Area: Mesothelioma/Asbestos
Date: May 29, 2013
Outcome: Significant verdict for Plaintiff
Description: Ralph Stoute contracted mesothelioma from exposure to asbestos products, including John Crane Gaskets. Plaintiffs proved that John Crane knew or should have known that asbestos was deadly for decades, but failed to take the proper precautions to protect Mr. Stoute. The jury found that John Crane was negligent, that its products were unreasonably dangerous, and that it failed to warn of asbestos related dangers.

Honors and Distinctions

  • The American Board of Trial Advocates (2014)
  • Texas Super Lawyers honoree (2013 – Present)
  • National Trial Lawyers, Top 100 Trial Lawyers Award (2014 – Present)
  • American Academy of Trial Attorneys, Premier Attorney Award (2015)
  • Texas Super Lawyers Rising Stars honoree (2005 – 2012)
  • Top 50 Verdicts in California Award (2015) – Winkel v. Colgate-Palmolive Co.
We have built this firm on the shared belief that there is nothing more important than fighting for those who are in need. That is the singular value that binds every member of our firm. For me, there is nothing more rewarding than helping someone who had lost hope find some semblance of justice.