Duane Morris

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Duane Morris LLP
Duane Morris
HeadquartersPhiladelphia, Pennsylvania
No. of offices29
No. of attorneys800+
Major practice areasGeneral practice
Key peopleMatthew A. Taylor (Chair)
Charles J. O'Donnell (COO)
RevenueIncrease US$526,230,000 (2021)[1]
Profit per equity partnerUS$1,081,000 (2021)[1]
Date founded1904; 118 years ago (1904)
Company typeLimited liability partnership

Duane Morris LLP is a law firm headquartered in Philadelphia, Pennsylvania. Founded in 1904 as Duane, Morris, Heckscher, & Roberts,[2] the firm has offices in the United States, London, Singapore, Vietnam, Oman, Myanmar, Shanghai, and Taiwan.[3] In addition to legal services, Duane Morris has independent affiliates employing approximately 100 professionals engaged in various other disciplines.

Ranking and recognition[edit]

U.S. News & World Report and Best Lawyers awarded[when?] Duane Morris top-tier national rankings in bankruptcy and creditor debtor rights/insolvency and reorganization law, construction law and litigation, employee benefits (ERISA) law, health care law, immigration, insurance, patent law and venture capital law. In total, 28 Duane Morris practice groups were nationally ranked.[4] Duane Morris was also named Law Firm of the Year for Construction Law.[5]

Chambers USA 2017 edition ranked Duane Morris among the national leaders in Construction, Healthcare, Insurance, and Immigration. Attorneys received 70 citations for excellence, and 21 practices were cited for excellence.[6]

In 2014, the Am Law 100 ranked Duane Morris as the 71st largest law firm in the U.S. based on gross revenue.[7]

In 2007, 2012, 2013, and 2014 Duane Morris was named one of the Working Mother and Flex-Time Lawyers' "50 Best Law Firms for Women" and was cited for its Women's Initiative Program. Duane Morris was featured in the December/January[when?] issue of the magazine and on workingmother.com and flextime lawyers.com.[8] In 2007, Duane Morris was named one of the 20 best companies for working women by Philadelphia[9] and one of the top 50 law firms for women by Working Mother magazine and Flex-Time Lawyers LLC, a national consulting firm focused on the retention and advancement of women.[10]


Under the ten-year leadership of Chair Sheldon Bonovitz from early 1998 to early 2008, Duane Morris grew from a little more than 200 lawyers in 1998 to more than 650 by January 2008. Revenues increased from $70 million to $375 million for 2007.[11] Bonovitz stepped down at the beginning of January 2008, replaced by former Vice Chair John J. Soroko.[12] Harvard Business School completed a case study of the firm's growth entitled "Duane Morris: Balancing Growth and Culture at a Law Firm," which was presented in the curriculum during the 2006–2007 academic year.[13][14]

In 2013, Duane Morris opened an office in Myanmar.[7] Also in 2013, Duane Morris opened an office in Oman.[15] As of 2017, the firm had more than 750 attorneys across 27 offices.[3][16]

In January 2020, Duane Morris LLP announced that it had reached a merger agreement with Satterlee Stephens. The combination expands Duane Morris' presence in New York City.[17]

Notable cases and deals[edit]

  • Heineken's $4.6B bid for Asia Pacific Breweries: In November 2012, Heineken N.V. closed its S$5.6 billion ($4.6 billion) takeover bid for Asia Pacific Breweries Ltd. (APBL), acquiring an additional 40-percent stake in the joint venture from its partner Fraser & Neave Ltd, a Singapore-based conglomerate. Duane Morris & Selvam, a joint law venture with Duane Morris, acted for Heineken in the transaction, which consolidated a controlling interest in APBL for the Amsterdam-based brewer of approximately 95 percent. The transaction marked one of the largest of its kind in Singapore in 2012. The deal was named Singapore M&A Deal of the Year by the ALB SE Asia Law Awards 2013.[18][19]
  • Lehigh Gas Partners IPO: Duane Morris completed a series of transactions in November 2012 that concluded with the $138 million initial public offering of wholesale motor fuel distributor Lehigh Gas Partners LP (NYSE: LGP).[20]
  • Markman v. Westview Instruments, Inc.: Duane Morris represented the plaintiff Markman in a patent infringement lawsuit.[21] After winning a jury verdict, Markman lost the case in a subsequent directed verdict for the defendant Westview due to questions of patent claims construction. The decision to reverse the jury verdict was affirmed by the Court of Appeals for the Federal Circuit and, later in 1996, the U.S. Supreme Court. The result of this case is that so-called Markman hearings are now routinely conducted in patent infringement lawsuits so that a judge will rule on the legal meaning of patent claims before the lawsuit is argued before a jury.[citation needed]
  • Tobacco Industry Litigation: Along with the Pittsburgh law firm of Buchanan Ingersoll, Duane Morris represented the Commonwealth of Pennsylvania in a 46-state class action lawsuit against the tobacco industry. The litigation concluded in 1998 with a landmark $206 billion global settlement agreement for the 46 suing states.[22][23][24]

Notable alumni[edit]


  1. ^ a b "Duane Morris". Law.com. ALM Global, LLC. Retrieved 17 May 2022.
  2. ^ "Past and Present". Duane Morris. 2013. Retrieved 29 May 2013.
  3. ^ a b "Office List". Duane Morris. 2013. Retrieved 29 May 2013.
  4. ^ "U.S. News - Best Lawyers Best Law Firms". Archived from the original on 2013-02-05. Retrieved 2012-12-17.
  5. ^ "Duane Morris LLP - Duane Morris Named Law Firm of the Year for Litigation-Construction by U.S. News-Best Lawyers". www.duanemorris.com. Retrieved 2022-03-18.
  6. ^ "Duane Morris LLP – Philadelphia – Law Firm Profile - Chambers USA 2014 – Chambers and Partners". www.chambersandpartners.com. Archived from the original on 2015-05-02.
  7. ^ a b "The Am Law 100: Firms Ranked by Gross Revenue | The American Lawyer".
  8. ^ "Farewell and Thank You". Seramount.
  9. ^ "Duane Morris Website" (PDF).
  10. ^ "Duane Morris LLP - Duane Morris Named 2007 Working Mother and Flex-Time Lawyers Best Law Firm For Women". www.duanemorris.com.
  11. ^ Sheldon Bonovitz Steps Down as Duane Morris Chairman, John Soroko Takes Over Law Firm Leadership January 4, 2008, The Legal Intelligencer
  12. ^ "Duane Morris LLP - Sheldon Bonovitz Steps Down as Duane Morris Chairman, John Soroko Takes Over Law Firm Leadership". www.duanemorris.com. Retrieved 2022-03-18.
  13. ^ "Newest Issue - ABA Journal". www.abajournal.com.
  14. ^ "Duane Morris LLP - Harvard Business School Publishes Case Study of Duane Morris". www.duanemorris.com.
  15. ^ "Gross Revenue: A New Number One | The American Lawyer".
  16. ^ "About Duane Morris". Duane Morris. 2013. Retrieved 29 May 2013.
  17. ^ Now, Delaware Business (2020-01-21). "New York law firm to merge with Duane Morris". Delaware Business Now. Retrieved 2020-02-24.
  18. ^ ALB SE Asia website
  19. ^ "Duane Morris LLP - Duane Morris & Selvam Toasts Client Heineken's $4.6 Billion Takeover Bid for Asia Pacific Breweries Ltd". www.duanemorris.com.
  20. ^ "Duane Morris LLP - Duane Morris Teams Complete Complex IPO Deal for Lehigh Gas Partners". www.duanemorris.com.
  21. ^ "Duane Morris LLP - Intellectual Property- Related Matters". Archived from the original on 8 December 2008.
  22. ^ National Association of Attorneys General, Master Settlement Agreement Archived June 25, 2008, at the Wayback Machine, Page 174
  23. ^ PA Bulletin Volume 30
  24. ^ "Duane Morris website". Archived from the original on May 13, 2008.

Further reading[edit]

  • Duane, Morris (1979). Duane, Morris and Heckscher: A History. Philadelphia, Pennsylvania. OCLC 7530000.

External links[edit]