Stephen W. Armstrong

Senior Counsel
123 South Broad St.
Philadelphia, PA 19109
Phone:  215-772-7552
Fax:  215-731-3706
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Practice Areas:
Alternative Dispute Resolution, Antitrust, Franchising and Distribution, Intellectual Property, Pharmaceutical / Life Sciences, Commercial Litigation
Chemical Manufacturing, Computer Software, Distributors, Retailers
Admitted to Practice:
Philadelphia, PA
Law School:
Georgetown University Law Center
Undergraduate School:
Brown University

Professional Experience:

Stephen W. Armstrong is chair of the Antitrust practice group at Montgomery McCracken.  His experience of over thirty years in antitrust matters covers the range of issues and problems faced by business clients, from traditional manufacturing and distribution issues, such as price fixing and restrictions on wholesalers and retailers, to emerging issues involving the application of antitrust and economics principles to computer technology, joint venture arrangements and nonprofit organizations.

He has specific knowledge in the chemical, computer manufacturing, software licensing, retail camera and photography, paper distribution, petroleum, pharmaceutical, and health care industries.  His clients have included a broad spectrum of types of businesses engaged in very different strategies and markets, which present unique legal issues: industrial and manufacturing firms, distribution companies, service industries, retailers, computer hardware and software producers, and trade associations.  Recent clients include AmerisourceBergen Corporation, Air Products and Chemicals, Inc., Brenntag North America, Rohm and Haas Corporation, the International Cemetery and Funeral Association, and Kohler Co.

His trial experience in antitrust cases includes claims of refusal to deal, tying arrangements, group boycotts, and monopolization.  He also has represented companies, and their officers or managers, in grand jury criminal pricing fixing investigations and government civil investigations that involved a wide variety of industries and problems.

In non-litigation matters, he has broad experience in providing advice on distribution arrangements, sales and pricing practices, price discrimination and promotional assistance, licensing agreements, dealer terminations, joint ventures, and partnering arrangements.  He has counseled trade associations or professional and their members on issues that include standards setting and certification, information exchange programs, membership issues, and antitrust compliance policies.  He also has represented associations in antitrust litigation and at trial.

Recent representations he has handled include government investigations into possible price fixing in certain industries; litigation raising claims of price fixing involving manufacturing, chemical, and computer industry products; and counseling on tying arrangements and refusals to deal, price discrimination, joint venture arrangements; joint cooperative activities in certain healthcare and manufacturing markets; and trade association antitrust compliance programs.

Mr. Armstrong's experience in intellectual property matters includes exposure to a broad range of issues and industries.  Among these matters, he has handled patent infringement litigation involving electronic article surveillance systems, high density memory storage systems, and electronic scoring software; trademark infringement litigation involving television signal scramblers; copyright issues concerning software operating systems, billing programs and administrative management systems, and contract disputes over network routing software and nationwide distribution and management enterprise programs.

Significant Antitrust Decisions:

Mr. Armstrong has participated in several litigated cases that produced significant developments in antitrust law, notably: Baxley-DeLamar Monuments, Inc. v. American Cemetery Ass'n, 938 F.2d 846 (8th Cir. 1991), 843 F.2d 1154 (8th Cir. 1988); Alan's of Atlanta, Inc. v. Minolta Corporation, 903 F.2d 1414 (11th Cir. 1990); Monument Builders of Greater Kansas City, Inc. v. American Cemetery Ass'n, 629 F. Supp. 1002 (D. Kan.), 891 F.2d 1473 (10th Cir. 1989); International Raw Materials, Inc. v. American Natural Soda Ash Corp., 716 F. Supp. 188 (E.D.Pa. 1989) (Hannum, J.), aff'd 898 F.2d 946 (3d Cir. 1990); 767 F. Supp. 687 (E.D. Pa. 1991) (Pollak, J.);  Bogosian v. Gulf Oil Corp., 561 F.2d 434 (3d Cir. 1977), 783 F.2d 587 (3d Cir. 1984);  Structure Probe, Inc. v. The Franklin Institute, 450 F. Supp. 1272 (E.D. Pa. 1978), aff'd 595 F.2d 1214 (3d Cir. 1979); Venzie Corp. v. United States Mineral Products Co., 521 F.2d 1309 (3d Cir. 1975).

Professional Associations:

Throughout his career Mr. Armstrong has contributed to the leadership of the American Bar Association Antitrust Section.  Currently he is Co-Chair of the Advocacy Committee and a Member of the Antitrust Section Advisory Review Board on Reserves.  Previously, he served as a member of the Antitrust Section Council, 2002-2005; chair and vice chair of the Trade Associations Committee 1998-2002; vice chair of the Spring Meeting Committee, 1996-97; chair of the Monograph Committee, 1985-86; chair of the Publications Committee, 1983-84; and chair of the Antitrust Law Journal, 1978-1982.  From 1986 to 1990 he was chair of the Antitrust Law Committee of the Philadelphia Bar Association Business Section.


Mr. Armstrong has authored several publications on antitrust including Trade Associations: Threatening or Promoting Competition? Antitrust Law Developments 1998-2000, The Antitrust Review of the Americas 2001; Communications and Associations Among Competitors: Price Fixing and Boycotts, The Antitrust Review of the Americas 2000; and Trade Association Recent Developments: Anti-Competitive Practices and Promoting Competition, The United States Antitrust Review 1998.  Mr. Armstrong has organized and led a variety of programs on antitrust topics including European Competition Law and Trade Associations, ABA Antitrust Section Spring Meeting, April 2002; Government Use of Trade Association Information and Activities, ABA Antitrust Section Spring Meeting, May 2001; What is the State of Association Codes of Conduct After California Dental?  What Rules Can Associations Adopt that Affect Price Advertising?, ABA Antitrust Section Spring Meeting, March 2001; Competitor Collaborations: Joint Ventures, Strategic Alliances, and Trade Associations, ABA Antitrust Section Annual Meeting, August 1999.

Special Recognition:

Mr. Armstrong was selected for inclusion in Super Lawyers - Alternative Dispute Resolution, 2012 for Pennsylvania.

Community Activities:

 In his community Mr. Armstrong has served as Counselor, Director, and Secretary of The St. Andrew's Society of Philadelphia, Director, Secretary, Vice President, and President of the Wynnewood Civic Association from 1972-86.  He also is a member of the Men's Garden Club of Philadelphia and the Brown Rowing Association.  He is a registered Republican and has supported local candidates for Congress and state offices.

Admitted to Practice:

Mr. Armstrong is admitted to practice in Pennsylvania.


A graduate of Brown University, Mr. Armstrong received an A.B. degree in 1965 with a concentration in History.  He received a J.D. in 1972 from Georgetown University Law Center, where he was a lead articles editor of the journal Law & Policy in International Business.